See Flow configuration or Square Root of DP Configuration for defaults when configuring with the LOI. Configuration. Reference Manual. May 2024. 00809-0300-4101.
Reference Manual 00809-0300-4101, Rev BC May 2024 RosemountTM 2051 Pressure Transmitter with PROFIBUS® PA Protocol Safety messages This guide provides basic guidelines for the Rosemount 2051 Pressure Transmitter. It does not provide instructions for configuration, diagnostics, maintenance, service, troubleshooting, explosion-proof, flameproof, or intrinsically safe (IS) installations. WARNING Explosions could result in death or serious injury. Installation of this transmitter in an explosive environment must be in accordance with the appropriate local, national, and international standards, codes, and practices. Review the approvals section of the Quick Start Guide for any restrictions associated with a safe installation. Before connecting a handheld communicator in an explosive atmosphere, ensure that the instruments in the loop are installed in accordance with intrinsically safe or non-incendive field wiring practices. In an explosion-proof/flameproof installation, do not remove the transmitter covers when power is applied to the transmitter. WARNING Process leaks could result in death or serious injury. Install and tighten process connectors before applying pressure. Do not attempt to loosen or remove flange bolts while the transmitter is in service. WARNING Electrical shock can result in death or serious injury. Avoid contact with the leads and terminals. High voltage that may be present on leads can cause electrical shock. Before connecting a handheld communicator in an explosive atmosphere, ensure that the instruments in the loop are installed in accordance with intrinsically safe or non-incendive field wiring practices. In an explosion-proof/flameproof installation, do not remove the transmitter covers when power is applied to the transmitter. WARNING Physical access Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end users' equipment. This could be intentional or unintentional and needs to be protected against. Physical security is an important part of any security program and fundamental in protecting your system. Restrict physical access by unauthorized personnel to protect end users' assets. This is true for all systems used within the facility. WARNING Replacement equipment or spare parts not approved by Emerson for use as spare parts could reduce the pressure retaining capabilities of the transmitter and may render the instrument dangerous. Use only bolts supplied or sold by Emerson as spare parts. 2 WARNING Improper assembly of manifolds to traditional flange can damage sensor module. For safe assembly of manifold to traditional flange, bolts must break back plane of flange web (bolt hole) but must not contact sensor module housing. CAUTION Improper assembly of manifolds to traditional flange can damage sensor module. For safe assembly of manifold to traditional flange, bolts must break back plane of flange web (i.e., bolt hole) but must not contact sensor module housing. NOTICE The products described in this document are NOT designed for nuclear-qualified applications. Using non-nuclear qualified products in applications that require nuclear-qualified hardware or products may cause inaccurate readings. For information on Rosemount nuclear-qualified products, contact your local Emerson Sales Representative. 3 4 Reference Manual 00809-0300-4101 Contents May 2024 Contents Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Introduction...............................................................................................................................7 1.1Overview....................................................................................................................................... 7 1.2Models covered............................................................................................................................7 1.3Device revisions........................................................................................................................... 8 1.4Transmitter overview.................................................................................................................. 8 1.5Product recycling/disposal......................................................................................................... 8 Configuration............................................................................................................................ 9 2.1Hazardous locations certifications............................................................................................ 9 2.2Configuration guidelines............................................................................................................ 9 2.3Basic setup tasks....................................................................................................................... 10 2.4Detailed setup tasks..................................................................................................................12 Hardware installation.............................................................................................................19 3.1Overview..................................................................................................................................... 19 3.2Installation considerations.......................................................................................................19 3.3Installation procedures............................................................................................................ 20 3.4Rosemount 304, 305, and 306 Manifolds............................................................................... 32 3.5Liquid level measurement........................................................................................................40 Electrical installation..............................................................................................................45 4.1Overview..................................................................................................................................... 45 4.2LCD display.................................................................................................................................45 4.3LCD display with local operator interface (LOI)..................................................................... 46 4.4Configuring security and simulation...................................................................................... 46 4.5Electrical considerations...........................................................................................................48 Calibration............................................................................................................................... 57 5.1Overview..................................................................................................................................... 57 5.2Calibration overview................................................................................................................. 57 5.3Determine calibration frequency............................................................................................ 58 5.4Zero trim.....................................................................................................................................59 5.5Sensor trim.................................................................................................................................59 5.6Recall factory trim..................................................................................................................... 60 5.7Compensating for line pressure .............................................................................................61 Troubleshooting...................................................................................................................... 63 6.1Overview..................................................................................................................................... 63 6.2Diagnostics identification and recommended action...........................................................63 6.3PlantwebTM and NE107 diagnostics.......................................................................................... 68 6.4Alert messages and fail safe type selection........................................................................... 68 6.5Disassembly procedures.......................................................................................................... 69 6.6Reassembly procedures........................................................................................................... 71 Reference data........................................................................................................................ 75 7.1Ordering information, specifications, and drawings............................................................75 2051 Pressure Transmitter 5 Contents May 2024 Reference Manual 00809-0300-4101 Appendix A Appendix B 7.2Product certifications................................................................................................................75 Local operator interface (LOI) menu.................................................................................... 77 A.1LOI Menu....................................................................................................................................77 PROFIBUS® PA Block Information.........................................................................................79 B.1PROFIBUS® block parameters................................................................................................. 79 B.2Condensed status..................................................................................................................... 84 6 Emerson.com/Rosemount Reference Manual 00809-0300-4101 1 1.1 Introduction Overview Figure 1-1: Commissioning and Installation Flowchart Introduction May 2024 1.2 Models covered The following Rosemount 2051 Transmitters are covered by this manual: · Rosemount 2051C CoplanarTM Pressure Transmitter · Rosemount 2051T In-Line Pressure Transmitter -- Measures gauge/absolute pressure up to 10,000 psi (689.5 bar). · Rosemount 2051L Level Transmitter -- Measures level and specific gravity up to 300 psi (20.7 bar). · Rosemount 2051CF Series Flow Meter -- Measures flow in line sizes from ½-in. (15 mm) to 96 in. (2400 mm). 2051 Pressure Transmitter 7 Introduction May 2024 Reference Manual 00809-0300-4101 1.3 1.4 1.5 Device revisions Table 1-1: Device Revisions Date 10/16 Software revision 2.6.1 PROFIBUS profile 3.02 Compatible files 2051 GSD: rmt3333.gsd Profile 3.02 GSD: pa139700.gsd DD: ROPA3__TP_2051.ddl DTM: Pressure_Profibus_3.02_DTM_v1.0.8.exe Manual revision BB Transmitter overview The Rosemount 2051C Coplanar design is offered for Differential Pressure (DP), Gauge Pressure (GP) and Absolute Pressure (AP) measurements. The Rosemount 2051C utilizes Emerson capacitance sensor technology for DP and GP measurements. Piezoresistive sensor technology is utilized in the Rosemount 2051T. The major components of the Rosemount 2051 are the sensor module and the electronics housing. The sensor module contains the oil filled sensor system (isolating diaphragms, oil fill system, and sensor) and the sensor electronics. The sensor electronics are installed within the sensor module and include a temperature sensor (RTD), a memory module, and the capacitance to digital signal converter (C/D converter). The electrical signals from the sensor module are transmitted to the output electronics in the electronics housing. The electronics housing contains the output electronics board, the optional Local Operator Interface (LOI) buttons, and the terminal block. For the Rosemount 2051C, design pressure is applied to the isolating diaphragms. The oil deflects the center diaphragm, which then changes the capacitance. This capacitance signal is then changed to a digital signal in the C/D converter. The microprocessor then takes the signals from the RTD and C/D converter calculates the correct output of the transmitter. Product recycling/disposal Consider recycling equipment and packaging. Dispose of the product and packaging in accordance with local and national legislation. 8 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Configuration May 2024 2 2.1 2.2 2.2.1 2.2.2 2.2.3 Configuration Hazardous locations certifications Individual transmitters are clearly marked with a tag indicating the approvals they carry. Transmitters must be installed in accordance with all applicable codes and standards to maintain these certified ratings. Refer to the Rosemount 2051 Profibus® Quick Start Guide for information on these approvals. Configuration guidelines The Rosemount 2051 can be configured either before or after installation. Configuring the transmitter on the bench using the LOI or Class 2 Master ensures that all transmitter components are in working order prior to installation. To configure on the bench, required equipment includes a power supply, an LOI (option M4) or a Class 2 Master with DP/PA coupler, proper cable and terminators. Verify the security hardware jumper is set to the OFF position in order to proceed with configuration. See Figure 4-2 for jumper location. Profile 3.02 identification number adaptation mode Rosemount 2051 PROFIBUS® Profile 3.02 devices are set to identification number adaptation mode (0127) when shipped from the factory. This mode allows the transmitter to communicate with any PROFIBUS Class 1 Master with either the generic profile GSD (9700) or Rosemount 2051 specific GSD (3333). Block modes When configuring a device with the LOI, the output status will change to Good Function Check to alert hosts that the transmitter is not in standard operation mode. When configuring a device with a Class 2 Master, blocks must be set to Out of Service (OOS) in order to download parameters that could affect the output. This prevents the Class 1 Master from seeing a jump in output without a status change. Setting the blocks OOS and back into Auto might be done automatically using the Class 2 Master when using the Rosemount 2051 DD or DTM, if no additional action is required when configuring the device. Verify the block mode is set back to Auto. Configuration tools The Rosemount 2051 can be configured using two tools: LOI and/or Class 2 Master. The LOI requires option code M4 to be ordered. To activate the LOI, push either configuration button located under the top tag of the transmitter. See Table 2-1 and Figure 2-1 for operation and menu information. See Local operator interface (LOI) menu for a complete LOI menu tree. Class 2 Masters require either DD or DTM files for configuration. These files can be found at EmersonProcess.com/Rosemount or by contacting your local Emerson representative. Some configurations steps may need to be completed in offline mode or using the LOI. 2051 Pressure Transmitter 9 Configuration May 2024 Reference Manual 00809-0300-4101 2.3 2.3.1 2.3.2 The remainder of this section will cover the configuration tasks using the applicable configuration tool. Note Instructions in this section use the language found in the Class 2 Master or LOI. See PROFIBUS® PA Block Information to cross reference parameters between the Class 2 Master, LOI and PROFIBUS specification. Basic setup tasks The following tasks are recommended for initial configuration of the Rosemount 2051 PROFIBUS® device. Assign address The Rosemount 2051 is shipped with a temporary address of 126. This must be changed to a unique value between 0 and 125 in order to establish communication with the Class 1 Master. Usually, addresses 02 are reserved for masters, therefore transmitter addresses between 3 and 125 are recommended for the device. Address can be set using either: · LOI: See Table 2-1 and Figure 2-1. · Class 2 Master: See respective Class 2 Master manual for setting instrument addresses. Pressure configuration The Rosemount 2051 ships with the following settings: · Measurement type: Pressure · Engineering units: Inches H2O · Linearization: None · Scaling: None Each of these parameters can be set using: · LOI: See Table 2-1 and Figure 2-1. · Class 2 Master Pressure unit parameters The LOI was designed to automatically set the following parameters when selecting a pressure unit: · Measurement type: Pressure · Linearization (Transducer Block): None · Scaling: None See Flow configuration or Square Root of DP Configuration for defaults when configuring with the LOI. 10 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Configuration May 2024 Table 2-1: LOI Operation Button Action Scroll Navigation Moves down menu categories Character entry Changes character value(1) Save? Changes between Save and Cancel Enter Select menu category Enters character and advances Saves (1) Characters flash when they can be changed. Figure 2-1: LOI Menu A. SCROLL down list B. ENTER into menu Note See Local operator interface (LOI) menu for a more detailed LOI menu and unit list. Pressure configuration using Class 2 Master Procedure 1. From the Basic Setup > Units > Primary Value > Primary Value Type dropdown, select Pressure. 2. Select Units. Note Pressure units in steps Step 3, 3.a, and 3.b must match. 3. From the Basic Setup > Units > Primary Value > Scale In (Transducer Block) > Unit (Secondary Value 1) dropdown, select Engineering Unit. a) From the Basic Setup > Units > Primary Value > Unit (PV) dropdown, select Engineering unit. b) From the Basic Setup > Units > Output Signal (Analog Input Block) > Unit (Out Scale) dropdown, select Engineering Unit. 4. Enter scaling. 2051 Pressure Transmitter 11 Configuration May 2024 Reference Manual 00809-0300-4101 2.4 2.4.1 12 Note Scaling is done in the Transducer Block. 5. In the Basic Setup > Units > Primary Value > Scale In (Transducer Block) field, enter upper and lower values (this value should correspond to the unit selected in step Step 3). a) In the Basic Setup > Units > Primary Value > Scale Out (Transducer Block) field, enter upper and lower values (this value should correspond to the unit selected in step 3.a). 6. Verify Analog Input (AI) Block. Note Scaling should not be repeated in the AI Block. To ensure no additional scaling is being done on the Al Block, set the lower values in steps Step 7 and 7.a to 0 and the upper values to 100. 7. In the Basic Setup > Units > Process Value Scale (Analog Input Block) field, enter upper and lower values (this value should correspond to the unit selected in step 3.a). a) In the Basic Setup > Units > Output Signal (Analog Input Block) field, enter upper and lower values (this value should correspond to the unit selected in step 3.b). b) From the Basic Setup > Units > Output Signal (Analog Input Block) > Linearization Type dropdown, select No Linearization. Detailed setup tasks The following tasks explain how to configure the Rosemount 2051 for Flow or Level measurement and how to configure additional parameters found in the device. Flow configuration LOI To configure the Rosemount 2051 for flow measurement with the LOI, select UNITS > FLOW. When configuring flow units, the following parameters are set: · Measurement type: Flow · Linearization (Transducer Block): Square Root During unit configuration, the user defines scaling, units and low flow cutoff per the application requirements. See Local operator interface (LOI) menu for detailed menu for further scaling help. Note The LOI assumes a zero based scaling (minimum pressure = minimum flow = zero) for Flow applications in order to improve configuration efficiency. Class 2 Masters can be used if non-zero based scaling is required. Low Flow Cutoff has a default value of 5.0%. Low Flow Cutoff can be set to 0% if required. Class 2 Master To configure the transmitter for a flow application, use the flow output in the Transducer Block. Emerson.com/Rosemount Reference Manual 00809-0300-4101 Configuration May 2024 2.4.2 Flow configuration using Class 2 Master: Procedure 1. From the Basic Setup > Units > Primary Value > Primary Value Type dropdown, select Flow. 2. Select Units. Note Flow units in steps 3.a and 3.b must match. 3. From the Basic Setup > Units > Primary Value > Scale In (Transducer Block) > Unit (Secondary Value 1) dropdown, select Engineering Unit. a) From the Basic Setup > Units > Primary Value > Unit (PV) dropdown, select Engineering Unit. b) From the Basic Setup > Units > Output Signal (Analog Input Block) > Unit (Out Scale) dropdown, select Engineering Unit. 4. Enter scaling. Note Scaling is done in the Transducer Block. 5. In the Basic Setup > Units > Primary Value > Scale In (Transducer Block) field, enter upper and lower values (this value should correspond to the unit selected in step Step 3). a) In the Basic Setup > Units > Primary Value > Scale Out (Transducer Block) field, enter upper and lower values (this value should correspond to the unit selected in step 3.a). 6. Verify Analog Input (AI) Block. Note Scaling should always be done in the Transducer Block. Ensure the AI Block is always set to no linearization for flow applications. To ensure no additional scaling is being done on the AI Block, set the lower values in steps Step 7 and 7.a to 0 and the upper values to 100. 7. In the Basic Setup > Units > Process Value Scale (Analog Input Block) field, enter upper and lower values (this value should correspond to the unit selected in step 3.a). a) In the Basic Setup > Units > Output Signal (Analog Input Block) field, enter upper and lower values (this value should correspond to the unit selected in Step 3.b). b) From the Basic Setup > Units > Output Signal (Analog Input Block) > Linearization Type dropdown, select No Linearization. Square Root of DP Configuration The Rosemount 2051 has two Pressure output settings: Linear and Square Root. Activate the Square Root output option to make output proportional to flow. To configure the transmitter to output square root of differential pressure, a Class 2 Master must be used. Square Root configuration using Class 2 Master: 2051 Pressure Transmitter 13 Configuration May 2024 Reference Manual 00809-0300-4101 2.4.3 Procedure 1. From the Basic Setup > Units > Primary Value > Primary Value Type dropdown menu, select Pressure. 2. Select Units. Note Pressure units in steps Step 3, 3.a, and 3.b must match. 3. From the Basic Setup > Units > Primary Value > Scale In (Transducer Block) > Unit (Secondary Value 1) dropdown, select Engineering Unit. a) From the Basic Setup > Units > Primary Value > Unit (PV) dropdown, select Engineering Unit. b) From the Basic Setup > Units > Output Signal (Analog Input Block) > Unit (Out Scale) dropdown, select Engineering Unit. 4. Enter scaling. Note Scaling is done in the Transducer Block. No scaling required for pressure measurement. 5. In the Basic Setup > Units > Primary Value > Scale In (Transducer Block) field, enter upper and lower values (this value should correspond to the unit selected in step Step 3). a) In the Basic Setup > Units > Primary Value > Scale Out (Transducer Block) field, enter upper and lower values (this value should correspond to the unit selected in step 3.a). 6. Verify Analog Input (AI) Block. Note Scaling should not be repeated in the Analog Input Block. To ensure no additional scaling is being done on the Al Block, set the lower values in steps Step 7 and 7.a to 0 and the upper values to 100. 7. In the Basic Setup > Units > Process Value Scale (Analog Input Block) field, enter upper and lower values (this value should correspond to the unit selected in step 3.a). a) In the Basic Setup > Units > Output Signal (Analog Input Block) field, enter upper and lower values (this value should correspond to the unit selected in step 3.b). b) From the Basic Setup > Units > Output Signal (Analog Input Block) > Linearization Type dropdown, select Square Root. Level configuration LOI To configure the Rosemount 2051 for Level measurement with the LOI, select UNITS > LEVEL. When configuring level units, the following parameters are set: · Measurement type: Level · Linearization (Transducer Block): None 14 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Configuration May 2024 During unit configuration, the user defines scaling and units per the application requirements. See Local operator interface (LOI) menu for detailed menu for further scaling help. Level configuration using Class 2 Master To configure the transmitter for a level application, use the level output in the Transducer Block. Procedure 1. From the Basic Setup > Units > Primary Value > Primary Value Type dropdown, select Level. 2. Select units. Note Level units in steps 3.a and 3.b must match. 3. From the Basic Setup > Units > Primary Value > Scale In (Transducer Block) > Unit (Secondary Value 1) dropdown, select Engineering Unit. a) From the Basic Setup > Units > Primary Value > Unit (PV) dropdown, select Engineering Unit. b) From the Basic Setup > Units > Output Signal (Analog Input Block) > Unit (Out Scale) dropdown, select Engineering Unit. 4. Enter scaling. Note Scaling is done in the Transducer Block. 5. In the Basic Setup > Units > Primary Value > Scale In (Transducer Block) field, enter upper and lower values (this value should correspond to the unit selected in step Step 3). a) In the Basic Setup > Units > Primary Value > Scale Out (Transducer Block) field, enter upper and lower values (this value should correspond to the unit selected in step 3.a). 6. Verify Analog Input (AI) Block. Note Scaling should not be repeated in the AI Block. To ensure no additional scaling is being done on the AI Block, set the lower values in steps Step 7 and 7.a to 0 and the upper values to 100. 7. In the Basic Setup > Units > Process Value Scale (Analog Input Block) field, enter upper and lower values (this value should correspond to the unit selected in step 3.a). a) In the Basic Setup > Units > Output Signal (Analog Input Block) field, enter upper and lower values (this value should correspond to the unit selected in step 3.b). b) From the Basic Setup > Units > Output Signal (Analog Input Block) > Linearization Type dropdown, select No Linearization. 2051 Pressure Transmitter 15 Configuration May 2024 Reference Manual 00809-0300-4101 2.4.4 2.4.5 Damping User-selected damping will affect the transmitters ability to respond to changes in the applied process. The Rosemount 2051 has a default damping value of 0.0 seconds applied in the AI Block. Damping can be set using: · LOI See Table 2-1 and Figure 2-1. · Class 2 Master See Damping configuration using Class 2 Master. Damping configuration using Class 2 Master Procedure In the Basic Setup > Damping > Filter Time Const field, enter value (in seconds). Process alerts Process alerts activate an output alert status when the configured alert point is exceeded. A process alert will be transmitted continuously if the output set points are exceeded. The alert will reset once the value returns within range. Process alert parameters are defined as follows: · Upper alarm: Changes Output Status to Good Critical Alarm Hi Limit · Upper warning: Changes Output Status to Good Advisory Alarm Hi Limit · Lower warning: Changes Output Status to Good Advisory Alarm Lo Limit · Lower alarm: Changes Output Status to Good Critical Alarm Lo Limit · Alarm hysteresis: Amount the output value must pass back into range before alarm is cleared. Upper alarm = 100 psi. Alarm Hysteresis = 0.5%. After activation at 100 psi, the alarm will clear once the output goes below 99.5 psi = 100 0.5 psi. Process alerts can be set using a Class 2 Master. Process alert configuration using Class 2 Master Procedure Enter process alerts: a) In the Basic Setup > Output > Output Limits > Upper Limit Alarm Limits field, enter upper alarm value. b) In the Basic Setup > Output > Output Limits > Upper Limit Warning Limits field, enter upper warning value. c) In the Basic Setup > Output > Output Limits > Lower Limit Alarm Limits field, enter lower alarm value. d) In the Basic Setup > Output > Output Limits > Lower Limit Warning Limits field, enter lower warning value. e) In the Basic Setup > Output > Output Limits > Limit Hysteresis field, enter a percent of range value. 16 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Configuration May 2024 2.4.6 2.4.7 2.4.8 2.4.9 LCD display The LCD display connects directly to the electronics board which maintains direct access to the signal terminals. A display cover is provided to accommodate the display. The display always indicates the transmitter output (Pressure, Flow, or Level) as well as abbreviated diagnostic status when applicable. Sensor temperature and pressure are optional variables that can be configured using LOI or Class 2 Master. When turned on, the display will alternate between the selected variables. For LCD display configuration using: · LOI See Table 2-1 and Figure 2-1. · Class 2 Master See LCD display configuration using Class 2 Master. LCD display configuration using Class 2 Master In Basic Setup > Display Variables > Local Operator Interface (LOI) > Display Selection, select the process variables to be shown on the local display. Security The Rosemount 2051 has a hierarchy of security features. The security jumper on the electronics board (or optional LCD display) provides the highest level of security. With the jumper in the ON position, all writes to the transmitter will be disabled (including writes from the LOI or a Class 2 Master). See Figure 4-2 for details on jumper configuration. LOI security To prevent unauthorized changes, either set the security jumper to ON and/or set an LOI password (Refer to Configuring security and simulation). The LOI password requires a user to enter a non-zero four digit password at the transmitter in order to operate the LOI. These parameters can be set using a Class 2 Master. LOI security configuration using Class 2 Master Procedure 1. To turn on the LOI password, enter value in the Basic Setup > Display Variables > Local Operator Interface (LOI) > Password field. 2. To turn off the LOI password, enter 0 in the Basic Setup > Display Variables > Local Operator Interface (LOI) > Password field. Note Security jumper must be in the Off position for the LOI to operate. The password appears after the LOI is activated using the local configuration buttons. Simulation The Rosemount 2051 has a simulation jumper located on the electronics board (or optional LCD display) that must be set to the ON position in order to simulate. With the AI block simulation enabled, the actual measurement value has no impact on the OUT value or the status. 2051 Pressure Transmitter 17 Configuration May 2024 Reference Manual 00809-0300-4101 Simulation configuration using Class 2 Master Procedure 1. Set the simulation jumper to On. 2. To enable simulation, select the following in Basic Setup > Simulation: a) Select Enabled. b) Enter Simulation Value. c) Select Simulation Status. d) Select Transfer. 3. To disable simulation, select the following in Basic Setup > Simulation: a) Select Disabled. b) Select Transfer. 4. Set the simulation jumper to Off. 18 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Hardware installation May 2024 3 3.1 3.2 3.2.1 Hardware installation Overview The information in this section covers installation considerations for the Rosemount 2051 with protocols. A Quick Start Guide (document number 00825-0200-4101) is shipped with every transmitter to describe recommended pipe-fitting and wiring procedures for initial installation. For dimensional drawing information, refer to the Dimensional Drawings section of the Rosemount 2051 Product Data Sheet. Note For transmitter disassembly and reassembly refer to the Dimensional Drawings section of the Rosemount 2051 Product Data Sheet and Reassembly procedures. Installation considerations Measurement accuracy depends upon proper installation of the transmitter and impulse piping. Mount the transmitter close to the process and use a minimum of piping to achieve best accuracy. Keep in mind the need for easy access, personnel safety, practical field calibration, and a suitable transmitter environment. Install the transmitter to minimize vibration, shock, and temperature fluctuation. NOTICE Install the enclosed pipe plug in unused conduit opening. Engage a minimum of five threads to comply with explosion-proof requirements. For tapered threads, install the plug wrench tight. For material compatibility considerations, see Material Selection and Compatibility Considerations for Rosemount Pressure Transmitter Technical Note. Mechanical considerations Steam service NOTICE For steam service or for applications with process temperatures greater than the limits of the transmitter, do not blow down impulse piping through the transmitter. Flush lines with the blocking valves closed and refill lines with water before resuming measurement. Side mounted When the transmitter is mounted on its side, position the CoplanarTM flange to ensure proper venting or draining. Keep drain/vent connections on the bottom for gas service and on the top for liquid service. 2051 Pressure Transmitter 19 Hardware installation May 2024 Reference Manual 00809-0300-4101 3.2.2 3.3 3.3.1 Environmental considerations Best practice is to mount the transmitter in an environment that has minimal ambient temperature change. The transmitter electronics temperature operating limits are 40 to 185 °F (40 to 85 °C). Mount the transmitter so that it is not susceptible to vibration and mechanical shock and does not have external contact with corrosive materials. Installation procedures Mounting the transmitter For dimensional drawing information refer to the Dimensional Drawings section of the Rosemount 2051 Product Data Sheet. Process flange orientation Mount the process flanges with sufficient clearance for process connections. For safety reasons, place the drain/vent valves so the process fluid is directed away from possible human contact when the vents are used. In addition, consider the need for a testing or calibration input. Rotate housing You can rotate the electronics housing up to 180 degrees in either direction to improve field access to wiring or to better view the optional LCD display. Procedure 1. Loosen the housing rotation set screw using a 5/64-inch hex wrench. Figure 3-1: Housing rotation A A. Housing rotation set screw (5/64-in.) 2. Rotate the housing clockwise to the desired location. 3. If the desired location cannot be achieved due to thread limitation, rotate the housing counterclockwise to the desired location (up to 360° from thread limit). 4. Retighten the housing rotation set screw to no more than 7 in.-lbs. when desired location is reached. 20 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Hardware installation May 2024 Terminal side of electronics housing Mount the transmitter so the terminal side is accessible. Clearance of 0.75-in. (19 mm) is required for cover removal. Use a conduit plug on the unused side of the conduit opening. Circuit side of electronics housing Provide 0.75-in. (19 mm) of clearance for units without an LCD display. Provide 3-in. (76 mm) of clearance for units installed with LCD display. Conduit entry threads For NEMA® 4X, IP66, and IP68 requirements, use thread seal (PTFE) tape or paste on male threads to provide a watertight seal. Environmental seal for housing Thread sealing (PTFE) tape or paste on male threads of conduit is required to provide a water/dust tight conduit seal and meets requirements of NEMA Type 4X, IP66, and IP68. Consult factory if other ingress protection ratings are required. For M20 threads, install conduit plugs to full thread engagement or until mechanical resistance is met. Always ensure a proper seal by installing electronics housing cover(s) so that metal contacts metal. Use Rosemount O-rings. Mounting brackets Transmitters may be panel-mounted or pipe-mounted through an optional mounting bracket. Refer to Table 3-1 for the complete offering and see Figure 3-2 through Figure 3-5 for dimensions and mounting configurations. Table 3-1: Mounting Brackets 2051 brackets Option code Process connections Coplanar In-line B4 B1 N/A N/A B2 N/A N/A B3 N/A N/A B7 N/A N/A B8 N/A N/A B9 N/A N/A BA N/A N/A BC N/A N/A Traditional N/A Mounting Pipe mount Panel mount N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Flat panel mount N/A N/A N/A N/A N/A Materials CS bracket SST bracket N/A N/A N/A N/A N/A N/A N/A N/A N/A CS SST bolts bolts N/A N/A N/A N/A N/A N/A N/A N/A N/A 2051 Pressure Transmitter 21 Hardware installation May 2024 Figure 3-2: Mounting Bracket Option Code B4 Reference Manual 00809-0300-4101 A. Pipe mounting B. Panel mounting C. 2-in. U-Bolt for pipe mounting (clamp shown) D. ¼ x 1 ¼ Bolts for transmitter mounting (not supplied) E. ¼ x 1 ¼ Bolts for transmitt mounting (not supplied) F. 5/16 x 1 ½ Bolts for panel mounting (not supplied) Note Dimensions are in inches (millimeters). 22 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Figure 3-3: Mounting Bracket Option Code B4 Hardware installation May 2024 A. Pipe mounting B. Panel mounting C. 2-in. U-Bolt for pipe mounting (clamp shown) D. ¼ x 1 ¼ Bolts for transmitter mounting (not supplied) E. ¼ x 1 ¼ Bolts for transmitt mounting (not supplied) F. 5/16 x 1 ½ Bolts for panel mounting (not supplied) Note Dimensions are in inches (millimeters). 2051 Pressure Transmitter 23 Hardware installation May 2024 Figure 3-4: Mounting Bracket Option Code B4 Reference Manual 00809-0300-4101 A. Pipe mounting B. Panel mounting C. 2-in. U-Bolt for pipe mounting (clamp shown) D. ¼ x 1 ¼ Bolts for transmitter mounting (not supplied) E. ¼ x 1 ¼ Bolts for transmitt mounting (not supplied) F. 5/16 x 1 ½ Bolts for panel mounting (not supplied) Note Dimensions are in inches (millimeters). Figure 3-5: Head Markings * The last digit in the F593 heading marking may be any letter between A and M. A. Carbon Steel (CS) Head Markings B. Stainless Steel (SST) Head Markings C. Alloy K-500 Head Markings Flange bolts The 2051 is shipped with a coplanar flange installed with four 1.75-in. (44 mm) flange bolts. See Figure 3-6 and Figure 3-8. Stainless steel bolts are coated with a lubricant to ease 24 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Hardware installation May 2024 installation. Carbon steel bolts do not require lubrication. No additional lubricant should be applied when installing either type of bolt. Bolts are identified by their head markings: Bolt installation Only use bolts supplied with the 2051 or provided by Emerson as spare parts. When installing the transmitter to one of the optional mounting brackets, torque the bolts to 125 in-lb. (0,9 N-m). Use the following bolt installation procedure: Procedure 1. Finger-tighten the bolts. 2. Torque the bolts to the initial torque value using a crossing pattern. 3. Torque the bolts to the final torque value using the same crossing pattern. Example Torque values for the flange and manifold adapter bolts are as follows: Table 3-2: Bolt Installation Torque Values Bolt material CS-ASTM-A449 Standard 316 SST--Option L4 ASTM-A-193-B7M--Option L5 ASTM-A-193 Class 2, Grade B8M--Option L8 Initial torque value 300 in-lb. (34 N-m) 150 in-lb. (17 N-m) 300 in-lb. (34 N-m) 150 in-lb. (17 N-m) Final torque value 650 in-lb. (73 N-m) 300 in-lb. (34 N-m) 650 in-lb. (73 N-m) 300 in-lb. (34 N-m) 2051 Pressure Transmitter 25 Hardware installation May 2024 Reference Manual 00809-0300-4101 Figure 3-6: Traditional Flange Bolt Configurations - Differential transmitter A. Drain/vent Figure 3-7: Traditional Flange Bolt Configurations - Gauge transmitter A. Drain/vent B. Plug Note Dimensions are in inches (millimeters). 26 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Hardware installation May 2024 Figure 3-8: Mounting Bolts and Bolt Configurations for Coplanar Flange 3.3.2 A. Transmitter with Flange Bolts B. Transmitter with Flange Adapters a Flange/Adapter Bolts Note Dimensions are in inches (millimeters). Table 3-3: Description Flange bolts Flange/adapter bolts Manifold/flange bolts Size in inches (mm) 1.75 (44) 2.88 (73) 2.25 (57) Note Rosemount 2051T transmitters are direct mount and do not require bolts for process connection. Impulse piping The piping between the process and the transmitter must accurately transfer the pressure to obtain accurate measurements. There are six possible sources of impulse piping error: · Pressure transfer · Leaks · Friction loss (particularly if purging is used) · Trapped gas in a liquid line · Liquid in a gas line · Density variations between the legs The best location for the transmitter in relation to the process pipe is dependent on the process. Use the following guidelines to determine transmitter location and placement of impulse piping: · Keep impulse piping as short as possible. 2051 Pressure Transmitter 27 Hardware installation May 2024 Reference Manual 00809-0300-4101 · For liquid service, slope the impulse piping at least 1 in./foot (8 cm/m) upward from the transmitter toward the process connection. · For gas service, slope the impulse piping at least 1 in./foot (8 cm/m) downward from the transmitter toward the process connection. · Avoid high points in liquid lines and low points in gas lines. · Ensure both impulse legs are the same temperature. · Use impulse piping large enough to avoid friction effects and blockage. · Vent all gas from liquid piping legs. · When using a sealing fluid, fill both piping legs to the same level. · When purging, make the purge connection close to the process taps and purge through equal lengths of the same size pipe. Avoid purging through the transmitter. · Keep corrosive or hot (above 250 °F [121 °C]) process material out of direct contact with the sensor module and flanges. · Prevent sediment deposits in the impulse piping. · Maintain equal leg of head pressure on both legs of the impulse piping. · Avoid conditions that might allow process fluid to freeze within the process flange. Mounting requirements Impulse piping configurations depend on specific measurement conditions. Refer to Figure 3-9 for examples of the following mounting configurations: Liquid flow measurement · Place taps to the side of the line to prevent sediment deposits on the process isolators. · Mount the transmitter beside or below the taps so gases vent into the process line. · Mount drain/vent valve upward to allow gases to vent. Gas flow measurement · Place taps in the top or side of the line. · Mount the transmitter beside or above the taps so to drain liquid into the process line. Steam flow measurement · Place taps to the side of the line. · Mount the transmitter below the taps to ensure that impulse piping will remain filled with condensate. · In steam service above +250 °F (+121 °C), fill impulse lines with water to prevent steam from contacting the transmitter directly and to ensure accurate measurement startup. NOTICE For steam or other elevated temperature services, it is important that temperatures at the process connection do not exceed the transmitter's process temperature limits. See Temperature Limits in the 2051 Pressure Transmitter Product Data Sheet for details. 28 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Figure 3-9: Liquid applications installation example Hardware installation May 2024 Figure 3-10: Gas applications installation example Figure 3-11: Steam applications installation example 2051 Pressure Transmitter 29 Hardware installation May 2024 Figure 3-12: Installation examples Liquid service Gas service Reference Manual 00809-0300-4101 Steam service 3.3.3 30 A. Flow Process connections Coplanar or traditional process connection NOTICE Install and tighten all four flange bolts before applying pressure, or process leakage will result. When properly installed, the flange bolts will protrude through the top of the sensor module housing. CAUTION Do not attempt to loosen or remove the flange bolts while the transmitter is in service. Install flange adapters Rosemount 2051DP and GP process connections on the transmitter flanges are ¼18 NPT. Flange adapters are available with standard ½14 NPT Class 2 connections. Use the flange adapters to disconnect from the process by removing the flange adapter bolts. WARNING Process leaks Process leaks could result in death or serious injury. Install and tighten all four flange bolts before applying pressure. Do not attempt to loosen or remove flange bolts while the transmitter is in service. Emerson.com/Rosemount Reference Manual 00809-0300-4101 Hardware installation May 2024 Use plant-approved lubricant or sealant when making the process connections. This distance may be varied ± in. (3.2 mm) by rotating one or both of the flange adapters. To install adapters to a coplanar flange: Procedure 1. Remove the flange bolts. Whenever you remove flanges or adapters, visually inspect the PTFE O-rings. If there are any signs of damage, such as nicks or cuts, replace the O-rings with O-rings designed for Rosemount transmitters. You may reuse undamaged O-rings. If you replace the O-rings, retorque the flange bolts after installation to compensate for cold flow. 2. Leaving the flange in place, move the adapters into position with the O-rings installed. 3. Clamp the adapters and the coplanar flange to the transmitter sensor module using the larger of the bolts supplied. 4. Tighten the bolts. Refer to Flange bolts for torque specifications. O-rings The two styles of Rosemount flange adapters (Rosemount 3051/2051/2024/3095) each require a unique O-ring (see Figure 3-13). Use only the O-ring designed for the corresponding flange adapter. WARNING Failure to install proper flange adapter O-rings may cause process leaks, which can result in death or serious injury. The two flange adapters are distinguished by unique O-ring grooves. Only use the O-ring that is designed for its specific flange adapter, as shown in Figure 3-13. When compressed, PTFE O-rings tend to cold flow, which aids in their sealing capabilities. Figure 3-13: O-rings A. Flange adapter B. O-ring C. PFTE based D. Elastomer NOTICE Replace PTFE O-rings if you remove the flange adapter. 2051 Pressure Transmitter 31 Hardware installation May 2024 Reference Manual 00809-0300-4101 3.3.4 Inline process connection NOTICE Do not apply torque directly to the sensor module. Rotation between the sensor module and the process connection can damage the electronics. To avoid damage, apply torque only to the hex-shaped process connection. A. Sensor module B. Process connection Inline gauge transmitter orientation The low side pressure port on the inline gauge transmitter is located in the neck of the transmitter, behind the housing. The vent path is 360 degrees around the transmitter between the housing and sensor. See Figure 3-14. Keep the vent path free of any obstruction, such as paint, dust, and lubrication, by mounting the transmitter so that the process can drain away. Figure 3-14: Inline gauge low side pressure port A 3.4 32 A. Low side pressure port (atmospheric reference) Rosemount 304, 305, and 306 Manifolds The 305 Integral Manifold is available in two designs: Traditional and Coplanar. You can mount the traditional 305 Integral Manifold to most primary elements with mounting adapters in the market today. The 306 Integral Manifold is used with the 2051T Emerson.com/Rosemount Reference Manual 00809-0300-4101 Hardware installation May 2024 In-Line Transmitters to provide block-and-bleed valve capabilities of up to 10,000 psi (690 bar). Figure 3-15: Manifolds 3.4.1 A. 2051C and 304 Conventional B. 2051C and 305 Integral Coplanar C. 2051C and 305 Integral Traditional D. 2051T and 306 In-Line Install 305 Integral Manifold Procedure 1. Inspect the PTFE sensor module O-rings. You may reuse undamaged O-rings. If the O-rings are damaged (if they have nicks or cuts, for example), replace with O-rings designed for Rosemount transmitters. NOTICE If replacing the O-rings, take care not to scratch or deface the O-ring grooves or the surface of the isolating diaphragm while you remove the damaged O-rings. 2. Install the integral manifold on the sensor module. Use the four 2¼-inch (57 mm) manifold bolts for alignment. Finger tighten the bolts; then tighten the bolts incrementally in a cross pattern to final torque value. 3. If you have replaced the PTFE sensor module O-rings, re-tighten the flange bolts after installation to compensate for cold flow of the O-rings. NOTICE Always perform a zero trim on the transmitter/manifold assembly after installation to eliminate mounting effects. 2051 Pressure Transmitter 33 Hardware installation May 2024 Reference Manual 00809-0300-4101 3.4.2 3.4.3 3.4.4 Install Rosemount 306 Integral Manifold The 306 Manifold is for use only with in-line pressure transmitters, such as the 3051T and 2051T. Assemble the 306 Manifold to the in-line transmitters with a thread sealant. Install 304 Conventional Manifold Procedure 1. Align the conventional manifold with the transmitter flange. Use the four manifold bolts for alignment. 2. Finger tighten the bolts; then tighten the bolts incrementally in a cross pattern to the final torque value. When fully tightened, the bolts extend through the top of the sensor module housing. 3. Leak-check assembly to maximum pressure range of transmitter. Integral manifold operation Perform a zero trim on 3 and 5-valve manifolds Perform zero trim at static line pressure. In normal operation, the two isolate (block) valves between the process ports and the transmitter will be open, and the equalize valve will be closed. A. High B. Low C. Drain/vent valve D. Isolate (open) E. Equalize (closed) F. Process 34 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Hardware installation May 2024 Procedure 1. To zero trim the transmitter, close the isolate valve on the low side (downstream) side of the transmitter. A. High B. Low C. Drain/vent valve D. Isolate (open) E. Equalize (closed) F. Process G. Isolate (closed) 2. Open the equalize valve to equalize the pressure on both sides of the transmitter. The manifold is now in the proper configuration for performing a zero trim on the transmitter. A. High B. Low C. Drain/vent valve D. Isolate (open) E. Equalize (open) F. Process G. Isolate (closed) 2051 Pressure Transmitter 35 Hardware installation May 2024 3. After zeroing the transmitter, close the equalize valve. Reference Manual 00809-0300-4101 A. High B. Low C. Drain/vent valve D. Isolate (open) E. Equalize (closed) F. Process G. Isolate (closed) 4. Finally, to return the transmitter to service, open the low side isolate valve. A. High B. Low C. Drain/vent valve D. Isolate (open) E. Equalize (closed) F. Process Zero a five-valve natural gas manifold Perform zero trim at static line pressure. In normal operation, the two isolate (block) valves between the process ports and the transmitter will be open, and the equalize valves will be closed. Vent valves may be open or closed. 36 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Hardware installation May 2024 A. High B. Low C. Plugged D. Isolate (open) E. Process F. Equalize (closed) G. Drain vent (closed) Procedure 1. To zero trim the transmitter, first close the isolate valve on the low pressure (downstream) side of the transmitter and the vent valve. A. High B. Low C. Plugged D. Isolate (open) E. Process F. Equalize (closed) G. Drain vent (closed) H. Isolate (closed) 2051 Pressure Transmitter 37 Hardware installation May 2024 Reference Manual 00809-0300-4101 2. Open the equalize valve on the high pressure (upstream) side of the transmitter. A. High B. Low C. Plugged D. Isolate (open) E. Process F. Equalize (open) G. Equalize (closed) H. Drain vent (closed) I. Isolate (closed) 3. Open the equalize valve on the low pressure (downstream) side of the transmitter. The manifold is now in the proper configuration for zeroing the transmitter. A. High B. Low C. Plugged D. Isolate (open) E. Process F. Equalize (open) G. Drain vent (closed) H. Isolate (closed) 38 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Hardware installation May 2024 4. After zeroing the transmitter, close the equalize valve on the low pressure (downstream) side of the transmitter. A. High B. Low C. Plugged D. Isolate (open) E. Process F. Equalize (open) G. Equalize (closed) H. Drain vent (closed) I. Isolate (closed) 5. Close the equalize valve on the high pressure (upstream) side. A. High B. Low C. Plugged D. Isolate (open) E. Process F. Equalize (closed) G. Drain vent (closed) H. Isolate (closed) 2051 Pressure Transmitter 39 Hardware installation May 2024 Reference Manual 00809-0300-4101 6. Finally, to return the transmitter to service, open the low side isolate valve and vent valve. The vent valve can remain open or closed during operation. 3.5 3.5.1 3.5.2 40 A. High B. Low C. Plugged D. Isolate (open) E. Process F. Equalize (closed) G. Drain vent (closed) Liquid level measurement Differential pressure transmitters used for liquid level applications measure hydrostatic pressure head. Liquid level and specific gravity of a liquid are factors in determining pressure head. This pressure is equal to the liquid height above the tap multiplied by the specific gravity of the liquid. Pressure head is independent of volume or vessel shape. Open vessels A pressure transmitter mounted near a tank bottom measures the pressure of the liquid above. Make a connection to the high pressure side of the transmitter and vent the low pressure side to the atmosphere. Pressure head equals the liquid's specific gravity multiplied by the liquid height above the tap. Zero range suppression is required if the transmitter lies below the zero point of the desired level range. Figure 3-16 shows a liquid level measurement example. Closed vessels Pressure above a liquid affects the pressure measured at the bottom of a closed vessel. The liquid specific gravity multiplied by the liquid height plus the vessel pressure equals the pressure at the bottom of the vessel. To measure true level, the vessel pressure must be subtracted from the vessel bottom pressure. To do this, make a pressure tap at the top of the vessel and connect this to the low side of the transmitter. Vessel pressure is then equally applied to both the high and low sides of the transmitter. The resulting differential pressure is proportional to liquid height multiplied by the liquid specific gravity. Dry leg condition Low-side transmitter piping will remain empty if gas above the liquid does not condense. This is a dry leg condition. Range determination calculations are the same as those described for bottom-mounted transmitters in open vessels, as shown in Figure 3-16. Emerson.com/Rosemount Reference Manual 00809-0300-4101 Figure 3-16: Liquid Level Measurement Example Hardware installation May 2024 A. Hi B. Zero C. Suppression D. Range E. Lo F. inH20 Let X equal the vertical distance between the minimum and maximum measurable levels (500 in. [12700 mm]). Let Y equal the vertical distance between the transmitter datum line and the minimum measurable level (100 in. [2540 mm]). Let SG equal the specific gravity of the fluid (0.9). Let h equal the maximum head pressure to be measured in inches of water. Let e equal head pressure produced by Y expressed in inches of water. Let Range equal e to e + h. Then h = (X)(SG) = 500 x 0.9 = 450 inH2O e = (Y)(SG) = 100 x 0.9 = 90 inH2O Range = 90 to 540 inH2O Wet leg condition Condensation of the gas above the liquid slowly causes the low side of the transmitter piping to fill with liquid. The pipe is purposely filled with a convenient reference fluid to eliminate this potential error. This is a wet leg condition. The reference fluid will exert a head pressure on the low side of the transmitter. You must then make zero elevation of the range. 2051 Pressure Transmitter 41 Hardware installation May 2024 Figure 3-17: Wet Leg Example Reference Manual 00809-0300-4101 Let X equal the vertical distance between the minimum and maximum measurable levels (500 in. [12700 mm]). Let Y equal the vertical distance between the transmitter datum line and the minimum measurable level (50 in. [1270 mm]). Let z equal the vertical distance between the top of the liquid in the wet leg and the transmitter datum line (600 in. [15240 mm]). Let SG1 equal the specific gravity of the fluid (1.0). Let SG2 equal the specific gravity of the fluid in the wet leg (1.1). Let h equal the maximum head pressure to be measured in inches of water. Let e equal the head pressure produced by Y expressed in inches of water. Let s equal head pressure produced by z expressed in inches of water. Let Range equal e s to h + e s. Then h = (X)(SG1) = 500 x 1.0 = 500 in H2O e = (Y)(SG1) = 50 x 1.0 = 50 in H2O s = (z)(SG2) = 600 x 1.1 = 660 in H20 Range = e s to h + e s. = 50 660 to 500 + 50 660 = 610 to 110 in H20 42 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Hardware installation May 2024 A. Zero elevation B. inH20 C. mA DC Bubbler system in open vessel A bubbler system that has a top-mounted pressure transmitter can be used in open vessels. This system consists of an air supply, pressure regulator, constant flow meter, pressure transmitter, and a tube that extends down into the vessel. Bubble air through the tube at a constant flow rate. The pressure required to maintain flow equals the liquid's specific gravity multiplied by the vertical height of the liquid above the tube opening. Figure 3-18 shows a bubbler liquid level measurement example. Figure 3-18: Bubbler Liquid Level Measurement Example A. Air Let X equal the vertical distance between the minimum and maximum measurable levels (100 in. [2540 mm]). Let SG equal the specific gravity of the fluid (1.1). Let h equal the maximum head pressure to be measured in inches of water. Let Range equal zero to h. Then h = (X)(SG) 2051 Pressure Transmitter 43 Hardware installation May 2024 = 100 x 1.1 = 110 inH2O Range = 0 to 110 inH2O A. mA DC B. inH20 Reference Manual 00809-0300-4101 44 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Electrical installation May 2024 4 4.1 4.2 Electrical installation Overview The information in this section covers installation considerations for the Rosemount 2051. A Quick Start Guide is shipped with every transmitter to describe pipe-fitting, wiring procedures and basic configuration for initial installation. Note For transmitter disassembly and reassembly refer to sections Disassembly procedures, and Reassembly procedures. LCD display Transmitters ordered with the LCD display option (M5) are shipped with the display installed. Installing the display on an existing 2051 Transmitter requires a small instrument screwdriver. Carefully align the desired display connector with the electronics board connector. If connectors don't align, the display and electronics board are not compatible. Figure 4-1: LCD Display Assembly A. LCD display B. Extended Cover C. Captive Screws 2051 Pressure Transmitter 45 Electrical installation May 2024 Reference Manual 00809-0300-4101 4.3 4.4 LCD display with local operator interface (LOI) Transmitters ordered with the LCD display with LOI option (M4) are shipped with the display and local configuration buttons installed. The configuration buttons are located under the top tag as indicated by the sticker. See Table 2-1 for LOI operation. Upgrading to an LOI transmitter requires installation of a new electronics board, configuration buttons and LCD display (if not previously ordered). Configuring security and simulation The Rosemount 2051 has four security methods: · Security switch · HART lock · Configuration buttons lock · Local operator interface (LOI) password Figure 4-2: 420 mA electronics board Without LCD display With LCD display 4.4.1 A. Alarm B. Security Note 1-5 Vdc alarm and security switches are located in the same location as 4-20 mA output boards. Set Security switch Use the Security switch to prevent changes to the transmitter configuration data. If the Security switch is set to the locked ( ) location, the transmitter will reject any transmitter configuration requests sent via HART®, the local operator interface (LOI), or local configuration buttons, and the transmitter configuration data will not be modified. Reference Figure 4-2 for the location of the security switch. To enable the Security switch: 46 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Electrical installation May 2024 4.4.2 4.4.3 4.4.4 Procedure 1. Set loop to Manual and remove power. 2. Remove transmitter housing cover. 3. Use a small screwdriver to slide the switch to the locked ( ) position. 4. Replace transmitter housing cover. WARNING Cover must be fully engaged to comply with explosion-proof requirements. HART® Lock The HART Lock prevents changes to the transmitter configuration from all sources; the transmitter will reject all changes requested via HART, the Local Operator Interface (LOI), and local configuration buttons. You can only set the HART Lock via HART communication, and the HART Lock is only available in HART Revision 7 mode. Use a communication device or AMS Device Manager to enable or disable the HART Lock. Configure HART® Lock using a communication device Procedure From the HOME screen, enter the fast key sequence: Fast keys 2, 2, 6, 4 Configuration Button lock The configuration button lock disables all local button functionality. Changes to the transmitter configuration from the LOI and local buttons will be rejected. Local external keys can be locked via HART® communication only. Configure Configuration Button Lock using a communication device Procedure From the HOME screen, enter the fast key sequence: Fast keys 2, 2, 6, 3 Local operator interface (LOI) password You can enter and enable an LOI password to prevent review and modification of device configuration via the LOI. This does not prevent configuration from HART® or external keys (analog Zero and Span; Digital Zero Trim). The LOI password is a 4 digit code that is to be set by the user. If the password is lost or forgotten the master password is "9307". The LOI password can be configured and enabled/disabled by HART Communication via a communication device, AMS Device Manager, or the LOI. 2051 Pressure Transmitter 47 Electrical installation May 2024 Reference Manual 00809-0300-4101 4.5 4.5.1 Electrical considerations WARNING Ensure all electrical installation is in accordance with national and local code requirements. WARNING Electrical shock Electrical shock can result in death or serious injury. Do not run signal wiring in conduit or open trays with power wiring or near heavy electrical equipment. Conduit installation NOTICE If all connections are not sealed, excess moisture accumulation can damage the transmitter. Mount the transmitter with the electrical housing positioned downward for drainage. To avoid moisture accumulation in the housing, install wiring with a drip loop, and ensure the bottom of the drip loop is mounted lower than the conduit connections of the transmitter housing. Figure 4-3 shows recommended conduit connections. Figure 4-3: Conduit installation diagrams A. Possible conduit line positions B. Sealing compound 48 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Figure 4-4: Incorrect conduit installation Electrical installation May 2024 4.5.2 4.5.3 Power supply The DC power supply should provide power with less than two percent ripple. The transmitter requires between 9 and 32 Vdc (between 9 and 17.5 Vdc for FISCO) at the terminals to operate and provide complete functionality. Wiring the transmitter NOTICE Incorrect wiring can damage the circuit. Do not connect the power signal wiring to the test terminals. Note Use shielded twisted pairs to yield best results. To ensure proper communication, use 24 AWG or larger wire and do not exceed 5000 ft. (1500 m). For 15 V 500 ft. (150 m) maximum, Emerson recommends unpaired three conductors or two twisted pairs. 2051 Pressure Transmitter 49 Electrical installation May 2024 Figure 4-5: Wiring the transmitter (420 mA HART®) Reference Manual 00809-0300-4101 B A A. Dc power supply B. RL 250 (necessary for HART communication only) Figure 4-6: Wiring the transmitter (15 Vdc low power) A B A. Dc power supply B. Voltmeter To connect wiring: Procedure 1. Remove the housing cover on terminal compartment side. Signal wiring supplies all power to the transmitter. WARNING Do not remove the cover in explosive atmospheres when the circuit is live. 2. Connect the leads. 50 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Electrical installation May 2024 4.5.4 NOTICE Power could damage the test diode. Do not connect the powered signal wiring to the test terminals. · For 420 mA HART output, connect the positive lead to the terminal marked (pwr/comm+) and the negative lead to the terminal marked (pwr/comm). · For 15 Vdc HART output, connect the positive lead to (PWR+) and the negative to the (PWR). 3. Plug and seal unused conduit connection on the transmitter housing to avoid moisture accumulation in the terminal side. Grounding the transmitter Ground signal cable shield Figure 4-7 summarizes signal cable shield grounding. Trim and insulate the signal cable shield and unused shield drain wire to ensure that the signal cable shield and drain wire do not come in contact with the transmitter case. To correctly ground the signal cable shield: Procedure 1. Remove the field terminals housing cover. 2. Connect the signal wire pair at the field terminals as indicated in Figure 4-5. 3. At the field terminals, trim the cable shield and shield drain wire closely and insulate them from the transmitter housing. 4. Reattach the field terminals housing cover. WARNING Cover must be fully engaged to comply with explosion-proof requirements. 5. At terminations outside the transmitter housing, make sure the cable shield drain wire is continuously connected. a) Prior to the termination point, insulate any exposed shield drain wire as shown in Figure 4-6 (B). 6. Properly terminate the signal cable shield drain wire to an earth ground at or near the power supply. 2051 Pressure Transmitter 51 Electrical installation May 2024 Figure 4-7: Wiring pair and ground A Reference Manual 00809-0300-4101 DP C B A. Insulate shield and shield drain wire B. Insulate exposed shield drain wire C. Terminate cable shield drain wire to earth ground Transmitter case grounding Always ground the transmitter case in accordance with national and local electrical codes. The most effective transmitter case grounding method is a direct connection to earth ground with minimal impedance. Methods for grounding the transmitter case include: · Internal ground connection: The internal ground connection screw is inside the FIELD TERMINALS side of the electronics housing. This screw is identified by a ground symbol ( ). The ground connection screw is standard on all Rosemount 2051 Transmitters. Refer to Figure 4-8. · External ground connection: The external ground connection is located on the exterior of the transmitter housing. Refer to Figure 4-9. This connection is only available with option V5 and T1. 52 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Figure 4-8: Internal Ground Connection A Electrical installation May 2024 A. Internal ground location 2051 Pressure Transmitter 53 Electrical installation May 2024 Figure 4-9: External Ground Connection (Option V5 or T1) Reference Manual 00809-0300-4101 A A. External ground location Note Grounding the transmitter case via threaded conduit connection may not provide sufficient ground continuity. Transient protection terminal block grounding The transmitter can withstand electrical transients of the energy level usually encountered in static discharges or induced switching transients. However, high-energy transients, such as those induced in wiring from nearby lightning strikes, can damage the transmitter. The transient protection terminal block can be ordered as an installed option (Option Code T1) or as a spare part to retrofit existing 2051 Transmitters in the field. See for part numbers. The lightning bolt symbol shown in Figure 4-10 identifies the transient protection terminal block. 54 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Electrical installation May 2024 Figure 4-10: Transient Protection Terminal Block A B A. External ground connection location B. Lightning bolt location Note The transient protection terminal block does not provide transient protection unless the transmitter case is properly grounded. Use the guidelines to ground the transmitter case. Refer to Figure 4-10. 2051 Pressure Transmitter 55 Electrical installation May 2024 Reference Manual 00809-0300-4101 56 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Calibration May 2024 5 5.1 5.2 Calibration Overview This section contains information on calibrating the RosemountTM 2051 Pressure Transmitter with PROFIBUS® PA Protocol using either the local operator interface (LOI) or a Class 2 Master. Calibration overview Calibration is defined as the process required to optimize transmitter accuracy over a specific range by adjusting the factory sensor characterization curve located in the micro- processor. This is done by performing one of the following procedures, Zero trim A single-point offset adjustment. It is useful for compensating for mounting position effects and is most effective when performed with the transmitter installed in its final mounting position. When performing a zero trim with a manifold, refer to Integral manifold operation. Note Do not perform a zero trim on absolute pressure transmitters. Zero trim is zero based, and absolute pressure transmitters reference absolute zero. To correct mounting position effects on absolute pressure transmitters, perform a lower trim within the sensor trim function. The lower trim function provides an offset correction similar to the zero trim function, but it does not require zero-based input. Sensor trim A two-point sensor calibration where two end-point pressures are applied, and all output is linearized between them. Always adjust the lower trim value first to establish the correct offset. Adjustment of the upper trim value provides a slope correction to the characterization curve based on the lower trim value. The trim values allow you to optimize performance over your specified measuring range at the calibration temperature. Sensor trimming requires an accurate pressure input at least four times more accurate than the transmitter in order to optimize performance over a specific pressure range. Note The Rosemount 2051 has been carefully calibrated at the factory. Trimming adjusts the position of the factory characterization curve. It is possible to degrade performance of the transmitter if any trim is done improperly or with inaccurate equipment. Note Rosemount 2051C Range 4 and Range 5 Transmitters require a special calibration procedure when used in differential pressure applications under high static line pressure. See Compensating for line pressure . Recall factory trim A command that allows the restoration of the as-shipped factory settings of the sensor trim. This command can be useful for recovering from an inadvertent zero trim of an absolute pressure unit or inaccurate pressure source. 2051 Pressure Transmitter 57 Calibration May 2024 Reference Manual 00809-0300-4101 5.3 5.3.1 Determine calibration frequency Calibration frequency can vary greatly depending on the application, performance requirements, and process conditions. To determine the calibration frequency that meets the needs of your application: Procedure 1. Determine the performance required for your application. 2. Determine the operating conditions. 3. Calculate the Total Probable Error (TPE). 4. Calculate the stability per month. 5. Calculate the calibration frequency. Sample calculation for a standard Rosemount 2051C 1. Determine the performance required for your application. Required performance: 0.30% of span 2. Determine the operating conditions. Transmitter: Calibrated span: Rosemount 2051CD, Range 2 (URL= 250 inH2O [623 mbar]) 150 inH2O (374 mbar) Ambient temperature change: ±50 °F (28 °C) Line pressure: 500 psig (34,5 bar) 3. Calculate Total Probable Error (TPE). TPE = = 0.189% of span Where: Reference accuracy = ± 0.065% of span Ambient temperature effect = Span static pressure effect(1) = 0.1% reading per 1000 psi (69 bar) = ±0.05% of span at maximum span 4. Calculate the stability per month. Stability = % of span for 3 years = ±0.0046% span per month 5. Calculate calibration frequency. (1) Zero static pressure effect removed by zero trimming at line pressure. 58 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Calibration May 2024 5.4 5.4.1 5.4.2 5.5 5.5.1 Zero trim Note The transmitter PV at zero pressure must be within 10% × Upper Sensor Limit (USL) of zero in order to calibrate using the zero trim function. LOI Procedure Enter Calibration > Zero. a) Verify measurement is within 10% × USL of zero. b) Save. Class 2 Master Procedure 1. To set the Transducer Block to Out of Service, select the following: a) From the Basic Setup > Mode > Transducer Block > Target dropdown, select Out of Service. b) Select Transfer. 2. To calibrate the sensor, select the following in Basic Setup > Calibration: a) In the Lower Calibration Point field, enter 0. b) Adjust pressure source to zero pressure. c) Verify Pressure Trimmed Value is stable and within 10% × LSL of zero. d) Select Transfer. 3. To set Transducer Block to Auto, select the following: a) From the Basic Setup > Mode > Transducer Block > Target dropdown, select Auto. b) Select Transfer. Sensor trim Note Use a pressure input source that is at least four times more accurate than the transmitter, and allow the input pressure to stabilize for ten seconds before entering any values. LOI Procedure 1. Enter Calibration > Lower menu. a) Enter trim unit and value. b) Verify measurement is stable. 2051 Pressure Transmitter 59 Calibration May 2024 Reference Manual 00809-0300-4101 5.5.2 5.6 5.6.1 c) Save. 2. Enter Calibration > Upper menu. a) Enter trim unit and value. b) Verify measurement is stable. c) Save. Class 2 Master Procedure 1. To set the Transducer Block to Out of Service, select the following: a) From the Basic Setup > Mode > Transducer Block > Target Mode dropdown, select Out of Service. b) Select Transfer. 2. Set the lower sensor calibration, select the following in Basic Setup > Calibration: a) In the Lower Calibration Point field, enter value. b) Adjust pressure source to desired pressure. c) Verify Pressure Trimmed Value is stable. d) Select Transfer. 3. Set the upper sensor calibration, select the following in Basic Setup > Calibration: a) In the Upper Calibration Point field, enter value. b) Adjust pressure source to desired pressure. c) Verify Pressure Trimmed Value is stable. d) Select Transfer. 4. To set Transducer Block to Auto, select the following: a) From the Basic Setup > Mode > Transducer Block > Target Mode dropdown, select Auto. b) Select Transfer. Recall factory trim LOI Procedure 1. Enter Calibration > Reset. 2. Save. 60 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Calibration May 2024 5.6.2 5.7 5.7.1 5.7.2 Class 2 Master Procedure 1. To set the Transducer Block to Out of Service, select the following: a) From the Basic Setup > Mode > Transducer Block > Target dropdown, select Out of Service. b) Select Transfer. 2. To Recall the Factory Trim, select the following in Basic Setup > Calibration > Factory Recall: a) Select Factory Settings. b) Select Transfer. 3. To set Transducer Block to AUTO, select the following: a) From the Basic Setup > Mode > Transducer Block > Target dropdown, select Auto. b) Select Transfer. Compensating for line pressure Range 2 and 3 The following specifications show the static pressure effect for the Rosemount 2051 Range 2 and 3 Pressure Transmitters used in differential pressure applications where line pressure exceeds 2000 psi (138 bar). Zero effect ±0.1% of the upper range limit plus an additional ±0.1% of upper range limit error for each 1000 psi (69 bar) of line pressure above 2000 psi (138 bar). Example Line pressure is 3000 psi (207 bar). Zero effect error calculation: ±(0.01 + 0.1 × [3 kpsi 2 kpsi]) = ±0.2% of the upper range limit Span effect Refer to Range 4 and 5. Range 4 and 5 Rosemount 2051 Range 4 and 5 Pressure Transmitters require a special calibration procedure when used in differential pressure applications. The purpose of this procedure is to optimize transmitter performance by reducing the effect of static line pressure in these applications. The Rosemount 2051 Differential Pressure Transmitters (Ranges 1, 2, and 3) do not require this procedure because optimization occurs in the sensor. Applying high static pressure to Rosemount 2051 Range 4 and 5 Pressure Transmitters causes a systematic shift in the output. This shift is linear with static pressure; correct it by performing the Sensor trim. The following specifications show the static pressure effect for Rosemount 2051 Range 4 and 5 Transmitters used in differential pressure applications: 2051 Pressure Transmitter 61 Calibration May 2024 Reference Manual 00809-0300-4101 Zero effect ±0.1% of the upper range limit per 1000 psi (69 bar) for line pressures from 0 to 2000 psi (0 to 138 bar) For line pressures above 2000 psi (138 bar), the zero effect error is ±0.2% of the upper range limit plus an additional ±0.2% of upper range limit error for each 1000 psi (69 bar) of line pressure above 2000 psi (138 bar). Example Line pressure is 3000 psi (3 kpsi). Zero effect error calculation: ±(0.2 + 0.2 × [3 kpsi 2 kpsi]) = ±0.4% of the upper range limit Span effect Correctable to ±0.2% of reading per 1000 psi (69 bar) for line pressures from 0 to 3626 psi (0 to 250 bar) The systematic span shift caused by the application of static line pressure is 1.00% of reading per 1000 psi (69 bar) for Range 4 transmitters, and 1.25% of reading per 1000 psi (69 bar) for Range 5 transmitters. 62 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Troubleshooting May 2024 6 6.1 6.2 6.2.1 6.2.2 Troubleshooting Overview This section contains information on how to troubleshoot the Rosemount 2051 Pressure Transmitter with PROFIBUS® PA Protocol. Diagnostics identification and recommended action The Rosemount 2051 PROFIBUS® device diagnostics can be used to warn a user about a potential transmitter error. There is a transmitter error if the Output Status reads anything but Good or Good - Function Check, or the LCD display reads SNSR or ELECT. Use Diagnostics identification and recommended action to identify what diagnostic condition exists based on the combination of errors under the How to Identify columns. Start with the Physical block diagnostic extension and use Primary value and Temperature status to identify the diagnostic condition. If a box is blank, it is not necessary to identify that diagnostic condition. Once condition is identified, use the Recommended actions to remedy the error. PV Simulation Enabled How to identify Class 1 or 2 Master Physical block diagnostic extension Simulate Active Class 2 Master N/A Primary value status Temperature N/A status Recommended actions 1. Check the simulation switch. 2. Replace the electronics. Pressure beyond sensor limit How to identify Class 1 or 2 Master Physical block diagnostic extension Sensor Transducer Block Error 2051 Pressure Transmitter 63 Troubleshooting May 2024 Reference Manual 00809-0300-4101 6.2.3 6.2.4 Class 2 Master Primary value status Bad, sensor failure, underflow/ overflow Temperature N/A status Recommended actions 1. Verify the applied pressure is within the range of the pressure sensor. 2. Check for impulse line plugging or leaks. 3. Replace the sensor module. Module Temperature Beyond limits How to identify Class 1 or 2 Master Physical block diagnostic extension Sensor Transducer Block Error Class 2 Master N/A Primary value status Temperature status Uncertain Recommended actions 1. Verify the sensor temperature is between -49 and 194 °F (-45 and 90 °C). 2. Replace the sensor module. Sensor Module Memory Failure How to identify Class 1 or 2 Master Physical block diagnostic extension Sensor Transducer Block Error Class 2 Master Primary value status Bad, Out of Service (OOS) Temperature N/A status Recommended actions Replace the sensor module. 64 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Troubleshooting May 2024 6.2.5 6.2.6 6.2.7 No Sensor Module Pressure Updates How to identify Class 1 or 2 Master Physical block diagnostic extension Sensor Transducer Block Error Class 2 Master Primary value status Bad, sensor failure, constant Temperature N/A status Recommended actions 1. Check cable connection between sensor module and electronics. 2. Replace electronics. 3. Replace the sensor module. No Device Temperature Updates How to identify Class 1 or 2 Master Physical block diagnostic extension Sensor Transducer Block Error Class 2 Master N/A Primary value status Temperature status Bad Recommended actions 1. Check cable connection between sensor module and electronics. 2. Replace electronics. 3. Replace the sensor module. Circuit Board Memory Failure How to identify Class 1 or 2 Master Physical block diagnostic extension Memory Failure Non Volatile Memory Integrity Error 2051 Pressure Transmitter 65 Troubleshooting May 2024 Reference Manual 00809-0300-4101 6.2.8 6.2.9 Class 2 Master N/A Primary value status Temperature N/A status Recommended actions Replace electronics. LOI button stuck How to identify Class 1 or 2 Master Physical block diagnostic extension LOI Button Malfunction Class 2 Master N/A Primary value status Temperature N/A status Recommended actions 1. Check if button is stuck under housing. 2. Replace buttons. 3. Replace electronics. Extended diagnostics identification with Class 1 Master If using a Class 1 Master to identify Physical Block Diagnostic Extensions, see Figure 6-1 and Figure 6-2 for diagnostic bit information. Table 6-1 and Table 6-2 list the diagnostic description for each bit. Note A Class 2 Master will automatically decode bits and provide diagnostic names. Figure 6-1: Extended Diagnostics Identification Standard Diagnostic Response 6 Bytes Extended Diagnostic Data Device Related Header byte 0 0 x x x x x x Status, Slot Number, Status Specifier 3 Bytes Diagnosis 4 Bytes Extended Diagnosis (Vendor Specific) 3 Bytes 66 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Troubleshooting May 2024 Figure 6-2: Diagnoses and Extended Diagnoses Bit Identification Diagnosis Byte 1 Byte 2 Bit 765432107654321 0 Unit_Diag_Bit(1) 31 30 29 28 27 26 25 24 39 38 37 36 35 34 33 32 Byte 3 Byte 4 765432107654321 0 47 46 45 44 43 42 41 40 55 54 53 52 51 50 49 48 Extended Diagnosis Byte 1 Byte 2 Bit 765432107654321 0 Unit_Diag_Bit(1) 63 62 61 60 59 58 57 56 71 70 69 68 67 66 65 64 Byte 3 76543210 79 78 77 76 75 74 73 72 (1) Unit_Diag_Bit is located in GSD file. Table 6-1: Diagnosis Descriptions Device related diagnosis Byte-bit 2-4 2-3 3-2 3-0 4-7 Unit_Diag_Bit (1) 36 35 42 40 55 (1) Unit_Diag_Bit is located in GSD file. Table 6-2: Extended Diagnosis Descriptions Diagnostic extension Byte-Bit Byte-bit Unit_Diag_Bit (1) 1-4 28 1-7 63 2-0 64 2-1 65 2-2 66 2-4 68 2-5 69 Diagnostic description Cold Start Warm Start Function Check Maintenance Alarm More Information Available Diagnostic description Simulate Active Other Out-of-Service Power-Up Device Needs Maintenance now Lost NV Data Lost Static Data 2051 Pressure Transmitter 67 Troubleshooting May 2024 Reference Manual 00809-0300-4101 6.3 6.4 Table 6-2: Extended Diagnosis Descriptions (continued) Diagnostic extension Byte-Bit Byte-bit Unit_Diag_Bit (1) 2-6 70 3-1 73 3-3 75 3-4 76 3-5 77 3-6 78 3-7 79 Diagnostic description Memory Failure ROM Integrity Error Non-Volatile Memory Integrity Error Hardware/Software Incompatible Manufacturing Block Integrity Error Sensor Transducer Block Error LOI Button Malfunction is detected (1) Unit_Diag_Bit is located in GSD file. PlantwebTM and NE107 diagnostics Table 6-3 describes the recommended status of each diagnostic condition based on Plantweb and NAMUR NE107 recommendations. Table 6-3: Output Status Name PlantWeb alert category NE107 category PV Simulation Enabled LOI button pressed Pressure beyond sensor limits Module Temperature Beyond limits Advisory Advisory Maintenance Maintenance Check Good Failure Out of spec Sensor Module Memory Failure No Sensor Module Pressure Updates No Device Temperature Updates Circuit Board Memory Failure Failure Failure Failure Failure Failure Failure Out of spec Failure LOI button stuck Failure Failure Alert messages and fail safe type selection Table 6-4 defines the output status and LCD display messages that will be driven by a diagnostic condition. This table can be used to determine what type of fail safe value setting is preferred. Fail safe type can be set with a Class 2 Master under Fail Safe > Fail Safe Mode. Table 6-4: Alert Messages Diagnostic Name PV Simulation Enabled Output status (based on fail safe type) Use fail safe value Use last good value Use wrong calculated value Depends on simulated value/ status Depends on simulated value/ status Depends on simulated value/status LCD display status N/A 68 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Troubleshooting May 2024 6.5 Table 6-4: Alert Messages (continued) Diagnostic Name Output status (based on fail safe type) Use fail safe value Use last good value Use wrong calculated value LCD display status LOI button pressed Good, function check Good, function check Good, function check N/A Pressure beyond Uncertain, sensor limits substitute set Uncertain, substitute set Bad, process related, maintenance alarm SNSR Module Temperature Beyond limits Uncertain, substitute set Uncertain, process related, no maintenance Uncertain, process SNSR related, no maintenance Sensor Module Memory Failure Bad, passivated Uncertain, substitute set Bad, maintenance alarm SNSR No Sensor Module Uncertain, Pressure Updates substitute set Uncertain, substitute set Bad, process related, maintenance alarm SNSR No Device Temperature Updates Uncertain, process related, no maintenance Uncertain, process related, no maintenance Uncertain, process SNSR related, no maintenance Circuit Board Memory Failure Bad, passivated Bad, passivated Bad, passivated ELECT LOI button stuck Bad, passivated Bad, passivated Bad, passivated ELECT Table 6-5: Output Status Bit Definition Description Bad - passivated HEX 0x23 Bad, maintenance alarm, more diagnostics available Bad, process related - no maintenance Uncertain, substitute set Uncertain, process related, no maintenance 0x24 0x28 0x4B 0x78 Good, ok Good, update event Good, advisory alarm, low limit Good, advisory alarm, high limit 0x80 0x84 0x89 0x8A Good, critical alarm, low limit Good, critical alarm, high limit Good, function check 0x8D 0x8E 0xBC DECIMAL 35 36 40 75 120 128 132 137 138 141 142 188 Disassembly procedures WARNING Do not remove the instrument cover in explosive atmospheres when the circuit is live. 2051 Pressure Transmitter 69 Troubleshooting May 2024 Reference Manual 00809-0300-4101 6.5.1 6.5.2 6.5.3 70 Removing from service Procedure 1. Follow all plant safety rules and procedures. 2. Power down device. 3. Isolate and vent the process from the transmitter before removing the transmitter from service. 4. Remove all electrical leads and disconnect conduit. 5. Remove the transmitter from the process connection. a) The Rosemount 2051 Transmitter is attached to the process connection by four bolts and two cap screws. Remove the bolts and screws and separate the transmitter from the process connection. Leave the process connection in place and ready for re-installation. Reference Installation procedures for coplanar flange. b) The Rosemount 2051 Transmitter is attached to the process by a single hex nut process connection. Loosen the hex nut to separate the transmitter from the process. Do not wrench on neck of transmitter. See warning in Inline process connection. NOTICE Do not wrench on neck of transmitter. 6. Clean isolating diaphragms with a soft rag and a mild cleaning solution, and rinse with clear water. Do not scratch, puncture, or depress the isolating diaphragms. 7. For the 2051C, whenever you remove the process flange or flange adapters, visually inspect the PTFE O-rings. Replace the O-rings if they show any signs of damage, such as nicks or cuts. Undamaged O-rings may be reused. Removing terminal block Electrical connections are located on the terminal block in the compartment labeled FIELD TERMINALS. Procedure 1. Remove the housing cover from the field terminal side. 2. Loosen the two small screws located on the assembly in the 9 o'clock and 5 o'clock positions relative to the top of the transmitter. 3. Pull the entire terminal block out to remove it. Removing electronics board The transmitter electronics board is located in the compartment opposite the terminal side. To remove the electronics board, see Figure 4-2 and perform following procedure: Procedure 1. Remove the housing cover opposite the field terminal side. 2. If you are disassembling a transmitter with a LCD display, loosen the two captive screws that are visible (See Overview for screw locations) on the front of the meter Emerson.com/Rosemount Reference Manual 00809-0300-4101 Troubleshooting May 2024 6.5.4 6.6 display. The two screws anchor the LCD display to the electronics board and the electronics board to the housing. NOTICE The electronics board is electrostatically sensitive; observe handling precautions for static-sensitive components 3. Using the two captive screws, slowly pull the electronics board out of the housing. The sensor module ribbon cable holds the electronics board to the housing. Disengage the ribbon cable by pushing the connector release. NOTICE If an LOI/LCD display is installed, use caution as there is an electronic pin connector that interfaces between the LOI/LCD display and electronics board. Removing sensor module from the electronics housing Procedure 1. Remove the electronics board. Refer to Removing electronics board. NOTICE To prevent damage to the sensor module ribbon cable, disconnect it from the electronics board before you remove the sensor module from the electrical housing. 2. Carefully tuck the cable connector completely inside of the internal black cap. NOTICE Do not remove the housing until after you tuck the cable connector completely inside of the internal black cap. The black cap protects the ribbon cable from damage that can occur when you rotate the housing. 3. Using a 5/64-inch hex wrench, loosen the housing rotation set screw one full turn. 4. Unscrew the module from the housing. Ensure that the black cap on the sensor module and sensor cable do not catch on the housing. Reassembly procedures Procedure 1. Inspect all cover and housing (non-process wetted) O-rings and replace if necessary. Lightly grease with silicone lubricant to ensure a good seal. 2. Carefully tuck the cable connector completely inside the internal black cap. To do so, turn the black cap and cable counterclockwise one rotation to tighten the cable. 3. Lower the electronics housing onto the module. Guide the internal black cap and cable on the sensor module through the housing and into the external black cap. 4. Turn the module clockwise into the housing. 2051 Pressure Transmitter 71 Troubleshooting May 2024 Reference Manual 00809-0300-4101 6.6.1 6.6.2 6.6.3 NOTICE Ensure the sensor ribbon cable and internal black cap remain completely free of the housing as you rotate it. Damage can occur to the cable if the internal black cap and ribbon cable become hung up and rotate with the housing. 5. Thread the housing completely onto the sensor module. The housing must be no more than one full turn from flush with the sensor module to comply with explosion proof requirements. 6. Tighten the housing rotation set screw to no more than 7 in-lbs when desired location is reached. Attaching electronics board Procedure 1. Remove the cable connector from its position inside of the internal black cap and attach it to the electronics board. 2. Using the two captive screws as handles, insert the electronics board into the housing. Ensure the power posts from the electronics housing properly engage the receptacles on the electronics board. NOTICE Do not force. The electronics board will slide gently onto the connections. 3. Tighten the captive mounting screws. 4. Replace the housing cover. Emerson recommends tightening the cover until there is no gap between the cover and the housing. Installing terminal block Procedure 1. Gently slide the terminal block into place, ensuring the two power posts from the electronics housing properly engage the receptacles on the terminal block. 2. Tighten the captive screws. 3. Replace the electronics housing cover. WARNING The transmitter covers must be fully engaged to meet explosion-proof requirements. Reassembling the 2051C process flange Procedure 1. Inspect the sensor module PTFE O-rings. 72 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Troubleshooting May 2024 Note Undamaged O-rings may be reused. Replace O-rings that show any signs of damage, such as nicks, cuts, or general wear. If you are replacing the O-rings, be careful not to scratch the O-ring grooves or the surface of the isolating diaphragm when removing the damaged O-rings. 2. Install the process connection. Possible options include: a) Coplanar process flange: · Hold the process flange in place by installing the two alignment screws to finger tightness (screws are not pressure retaining). NOTICE Do not over-tighten as this will affect module-to-flange alignment. · Install the four 1.75-in. flange bolts by finger tightening them to the flange. b) Coplanar process flange with flange adapters: · Hold the process flange in place by installing the two alignment screws to finger tightness (screws are not pressure retaining). NOTICE Do not over-tighten as this will affect module-to-flange alignment. · Hold the flange adapters and adapter O-rings in place while installing (in the desired of the four possible process connection spacing configurations) using four 2.88-inch bolts to mount securely to the coplanar flange. For gauge pressure configurations, use two 2.88-inch bolts and two 1.75-inch bolts. a) Manifold: · Contact the manifold manufacturer for the appropriate bolts and procedures. 3. Tighten the bolts to the initial torque value using a crossed pattern. See Table 6-6 for appropriate torque values. 4. Using same cross pattern, tighten bolts to final torque values seen in Table 6-6. Table 6-6: Bolt Installation Torque Values Bolt material CS-ASTM-A445 Standard 316 SST--Option L4 ASTM-A-19 B7M--Option L5 ASTM-A-193 Class 2, Grade B8M--Option L8 Initial torque value 300 in-lb. (34 N-m) 150 in-lb. (17 N-m) 300 in-lb. (34 N-m) 150 in.-lb (17 N-m) Final torque value 650 in-lb. (73 N-m) 300 in-lb. (34 N-m) 650 in-lb. (73 N-m) 300 in.-lb (34 N-m) Note If you replaced the PTFE sensor module O-rings, re-torque the flange bolts after installation to compensate for cold flow of the O-ring material. 2051 Pressure Transmitter 73 Troubleshooting May 2024 Reference Manual 00809-0300-4101 6.6.4 For Range 1 transmitters: after replacing O-rings and re-installing the process flange, expose the transmitter to a temperature of 185 °F (85 °C) for two hours. Then re-tighten the flange bolts in a cross pattern, and again expose the transmitter to a temperature of 185 °F (85 °C) for two hours before calibration. Installing drain/vent valve Procedure 1. Apply sealing tape to the threads on the seat. Starting at the base of the valve with the threaded end pointing toward the installer, apply five clockwise turns of sealing tape. 2. Tighten the drain/vent valve to 250 in-lb. (28.25 N-m). CAUTION Take care to place the opening on the valve so that process fluid will drain toward the ground and away from human contact when the valve is opened. 74 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Reference data May 2024 7 7.1 7.2 Reference data Ordering information, specifications, and drawings To view current Rosemount 2051 Pressure Transmitter ordering information, specifications, and drawings: Procedure 1. Go to the Rosemount 2051 CoplanarTM Pressure Transmitter Product Detail Page. 2. Scroll as needed to the green menu bar and click Documents & Drawings. 3. For installation drawings, click Drawings & Schematics and select the appropriate document. 4. For ordering information, specifications, and dimensional drawings, click Data Sheets & Bulletins and select the appropriate Product Data Sheet. Product certifications To view current Rosemount 2051 Pressure Transmitter product certifications: Procedure 1. Go to the Rosemount 2051 CoplanarTM Pressure Transmitter Product Detail Page. 2. Scroll as needed to the green menu bar and click Documents & Drawings. 3. Click Manuals & Guides. 4. Select the appropriate Quick Start Guide. 2051 Pressure Transmitter 75 Reference data May 2024 Reference Manual 00809-0300-4101 76 Emerson.com/Rosemount Reference Manual 00809-0300-4101 Local operator interface (LOI) menu May 2024 A A.1 Local operator interface (LOI) menu LOI Menu Figure A-1: Detailed LOI Menu Either button or PASSWORD ON? Password protection is default out of the factory as off. The customer will need a configuration tool to set it. Display mode TRUE CODE CORRECT? FALSE DROP OUT OF LOI DISPLAY-PV DISPLAY-PV UNITS see page 2 UNITS see page 2 EXCEEDS LIMIT NO YES UNITS see page 2 DISPLAY-PV DISPLAY-PV UNITS see page 2 DISPLAY-PV DISPLAY-PV EXCEEDS LIMIT NO YES EXCEEDS LIMIT NO YES UNITS see page 2 UNITS see page 2 UNITS see page 2 UNITS see page 2 see page 2 Go To Save/Cancl UNITS UNITS see page 2 Go To Save/Cancl see page 2 Go To Save/Cancl CURRENT VALUE see page 2 2051 Pressure Transmitter 77 Local operator interface (LOI) menu May 2024 Reference Manual 00809-0300-4101 Either button or PASSWORD ON? Password protection is default out of the factory as off. The customer will need a configuration tool to set it. Display mode TRUE CODE CORRECT? FALSE DROP OUT OF LOI DISPLAY-PV DISPLAY-PV UNITS see page 2 UNITS see page 2 EXCEEDS LIMIT NO YES UNITS see page 2 DISPLAY-PV DISPLAY-PV UNITS see page 2 DISPLAY-PV DISPLAY-PV EXCEEDS LIMIT NO YES EXCEEDS LIMIT NO YES UNITS see page 2 UNITS see page 2 UNITS see page 2 UNITS see page 2 see page 2 Go To Save/Cancl UNITS UNITS see page 2 Go To Save/Cancl see page 2 Go To Save/Cancl CURRENT VALUE see page 2 78 Emerson.com/Rosemount Reference Manual 00809-0300-4101 PROFIBUS® PA Block Information May 2024 B PROFIBUS® PA Block Information B.1 PROFIBUS® block parameters Table B-1 through Table B-3 can be used to cross reference parameters from the PROFIBUS® specification, Class 2 Master, and Local Operator Interface (LOI). Table B-1: Physical Block Parameters Index Parameter name DTMTM name LOI Definition location(1) 0 BLOCK OBJECT Block Object N/A N/A 1 ST_REV Static Revision N/A No. The revision level of the static data associated with block; the revision value will be incremented each time a static parameter value in the block is changed. 2 TAG_DESC Tag N/A The user description of the intended block application. 3 STRATEGY Strategy N/A Grouping of function blocks. 4 ALERT_KEY Alert Key N/A The identification number of the plant unit. This information may be used in the host for sorting alarms, etc. 5 TARGET_MODE Target Mode N/A Contains desired mode of the block normally set by the operator or a control specification. 6 MODE_BLK Actual Mode N/A Contains the actual, permitted, and normal modes of the block. 7 ALARM_SUM N/A N/A Contains the current states of the block alarms 8 SOFTWARE REVISION Software N/A Revision Software revision, includes a major, minor, and build revision. 9 HARDWARE_REVISION Hardware N/A Revision Hardware revision 10 DEVICE_MAN_ID Manufacturer N/A Identification code of the manufacturer of the field device 11 DEVICE_ID Device ID N/A Identification of the device (Rosemount 2051) 12 DEVICE_SER_NUM Device Serial N/A Num Serial number of the device (output board serial number). 13 DIAGNOSIS Diagnosis N/A Detailed information of the device bitwise coded. MSB (bit 31) represents more information available in Diagnosis extension. 14 DIAGNOSIS_EXTENSION Diagnosis N/A Extension Additional manufacturer diagnoses information (See DIAGNOSIS_EXTENSION table below). 15 DIAGNOSIS_MASK N/A N/A Definition of supported DIAGNOSIS information bits 2051 Pressure Transmitter 79 PROFIBUS® PA Block Information May 2024 Reference Manual 00809-0300-4101 Table B-1: Physical Block Parameters (continued) Index Parameter name 16 DIAGNOSIS_MASK_EXTENSION 18 WRITE_LOCKING 19 FACTORY_RESET 20 DESCRIPTOR 21 DEVICE_MESSAGE 22 DEVICE_INSTAL_DATE 23 LOCAL_OP_ENA 24 IDENT_NUMBER_SELECTOR 25 HW_WRITE_PROTECTION 26 FEATURE 27 COND_STATUS_DIAG 33 FINAL_ASSEMBLY_NUM 34 DOWNLOAD_MODE 35 PASSCODE_LOI 36 LOI_DISPLAY_SELECTION 37 LOI_BUTTON_STATE 38 VENDOR_IDENT_NUMBER 39 LOI_PRESENT 40 HW_SIMULATE_PROTECTION DTMTM name N/A LOI location(1) N/A Write Locking N/A Factory Reset N/A Descriptor N/A Message N/A Installation Date LOI Enable Ident Number Selector N/A N/A IDENT HW Write N/A Protection Optional Device N/A Features N/A N/A Final Assembly Number Factory Upgrade Password Display Selection Button State Vendor Ident Number LOI Present N/A N/A PSSWD DISP N/A IDENT N/A HW Simulation N/A Protection Definition Definition of supported DIAGNOSIS_EXTENSION information bits Software write protection Command for restarting device User-definable text to describe the device. User-definable message to the device or application in plant. Date of installation of the device. Disable/enable the optional LOI Specifies the cyclic behavior of a device which is described in the corresponding GSD file Status of the security jumper Indicates optional features implemented in the device Indicates the mode of a device that can be configured for status and diagnostic behavior The same final assembly number placed on the neck label Puts the device into a manufacturer mode for upgrading the device Password for the LOI Indicates process variables shown on the local display Status of the optional LOI buttons 0x3333 Parameter written during manufacturing to indicate if an optional LOI is present Status of hardware simulation jumper (1) If blank, parameter is not applicable to LOI. Table B-2: Transducer Block Parameters Index Parameter name DTM name 1 ST_REV Static Revision No. LOI Definition location(1) N/A The revision level of the static data associated with block; the revision value will be incremented each time a static parameter value in the block is changed. 80 Emerson.com/Rosemount Reference Manual 00809-0300-4101 PROFIBUS® PA Block Information May 2024 Table B-2: Transducer Block Parameters (continued) Index Parameter name DTM name LOI Definition location(1) 2 TAG_DESC 3 STRATEGY Tag Strategy N/A The user description of the intended block application. N/A Grouping of function blocks. 4 ALERT_KEY Alert Key N/A The identification number of the plant unit. This information may be used in the host for sorting alarms, etc. 5 TARGET_MODE 6 MODE_BLK Target Mode N/A Actual Mode N/A Contains desired mode of the block normally set by the operator or a control specification. Contains the actual, permitted, and normal modes of the block. 7 ALARM_SUM N/A N/A Contains the current states of the block alarms 8 SENSOR_VALUE 9 SENSOR_HI_LIM Pressure raw N/A value Upper Sensor N/A Limit Raw sensor value, untrimmed, in SENSOR_UNIT Upper sensor range value, in SENSOR_UNIT 10 SENSOR_LO_LIM Lower Sensor N/A Limit Lower sensor range value, in SENSOR_UNIT 11 CAL_POINT_HI 12 CAL_POINT_LO Upper CALIB-> Calibration Point UPPER Lower CALIB-> Calibration Point LOWER The value of the sensor measurement used for the high calibration point. Unit is derived from SENSOR_UNIT. The value of the sensor measurement used for the low calibration point. Unit is derived from SENSOR_UNIT. 13 CAL_MIN_SPAN Calibration Min N/A Span The minimum span that is allowed between the calibration high and low points. 14 SENSOR_UNIT 15 TRIMMED_VALUE Sensor Unit UNITS Pressure UNITS Trimmed Value Engineering units for the calibration values Contains the sensor value after the trim processing. Unit is derived from SENSOR_UNIT. 16 SENSOR_TYPE Sensor Type N/A Sensor type (capacitance, strain gauge) 18 SENSOR_SERIAL_NUMBER 19 PRIMARY_VALUE Sensor Serial N/A Number Primary Value N/A Sensor serial number Measured value and status available to the Function Block. The unit of PRIMARY_VALUE is the PRIMARY_VALUE_UNIT. 20 PRIMARY_VALUE_UNIT Unit (PV) N/A Engineering units for the primary value 21 PRIMARY_VALUE_TYPE Primary Value N/A Type 22 SENSOR_DIAPHRAGM_MATERIAL Isolator Material N/A Type of pressure application (pressure, flow, level) Type of material of the sensor isolator 23 SENSOR_FILL_FLUID Module Fill Fluid N/A Type of fill fluid used in sensor 2051 Pressure Transmitter 81 PROFIBUS® PA Block Information May 2024 Reference Manual 00809-0300-4101 Table B-2: Transducer Block Parameters (continued) Index Parameter name 24 SENSOR_O_RING_MATERIAL 25 PROCESS_CONNECTION_TYPE 26 PROCESS_CONNECTION_MATERIAL 27 TEMPERATURE 28 TEMPERATURE_UNIT 29 SECONDARY_VALUE_1 30 SECONDARY_VALUE_1_UNIT 31 SECONDARY_VALUE_2 33 LIN_TYPE 34 SCALE_IN 35 SCALE_OUT 36 LOW_FLOW_CUT_OFF 59 FACT_CAL_RECALL 60 SENSOR_CAL_METHOD 61 SENSOR_VALUE_TYPE DTM name LOI Definition location(1) O-ring Material N/A Type of material of the flange O-rings Process N/A Connection Type Type of flange that is attached to the device Process N/A Connection Material Type of material of the flange Temperature N/A Sensor temperature, in TEMPERATURE_UNIT Temperature Unit UNITS Engineering units of the sensor temperature Secondary Value UNITS 1 Trimmed pressure value, unscaled, in SECONDARY_VALUE_1_UNIT Unit (Secondary UNITS Value 1) Engineering unit of SECONDARY_VALUE_1 Secondary Value UNITS 2 Measured value after input scaling Characterization UNITS type Linearization type Scale in UNITS Input scaling in SECONDARY_VALUE_1_UNIT Scale out UNITS Output scaling in PRIMARY_VALUE_UNIT Low Flow Cut Off UNITS-> FLOW This is the point in percent of flow until the output of the flow function is set to zero. It is used for suppressing low flow values Restore Calibration Factory CALIB-> RESET Recalls the sensor calibration set at the factory Sensor N/A Calibration Factor The method of last sensor calibration. Transmitter Type N/A Type of pressure measurement (differential, absolute, gauge) (1) If blank, parameter is not applicable to LOI. Table B-3: Analog Input Block Parameters Index Parameter name DTM name 1 ST_REV Static Revision No. 2 TAG_DESC 3 STRATEGY Tag Strategy LOI Definition location(1) N/A The revision level of the static data associated with block; the revision value will be incremented each time a static parameter value in the block is changed. N/A The user description of the intended block application. N/A Grouping of function blocks. 82 Emerson.com/Rosemount Reference Manual 00809-0300-4101 PROFIBUS® PA Block Information May 2024 Table B-3: Analog Input Block Parameters (continued) Index Parameter name DTM name LOI Definition location(1) 4 ALERT_KEY 5 TARGET_MODE Alert Key N/A Target Mode N/A The identification number of the plant unit. This information may be used in the host for sorting alarms, etc. Contains desired mode of the block normally set by the operator or a control specification. 6 MODE_BLK Actual Mode N/A Contains the actual, permitted, and normal modes of the block. 7 ALARM_SUM 8 BATCH Alarm Summary N/A Batch N/A Information Contains the current states of the block alarms Used in Batch applications according to IEC 61512-1 10 OUT Value (Output) N/A Value and status of the block output. 11 PV_SCALE 12 OUT_SCALE PV Scale N/A Output Scale N/A Conversion of the Process Variable into percent using the high and low scale value, in TB.PRIMARY_VALUE_UNIT The high and low scale values, units code, and number of digits to the right of the decimal point associated with OUT. 13 LIN_TYPE Characterization N/A Type Linearization type 14 CHANNEL 16 PV_FTIME Channel N/A Filter Time Const DAMP Used to select the Transducer Block measurement value. Always 0x112. The time constant of the first order PV filter. Time required for a 63% change in the input value (seconds). 17 FSAFE_TYPE Fail Safe Mode N/A Defines the reaction of the device, if a fault is detected 18 FSAFE_VALUE 19 ALARM_HYS Fail Safe Default N/A Value Limit Hysteresis N/A Default value for the OUT parameter, in OUT_SCALE units, if a sensor or sensor electronic fault is detected The amount the alarm value must return within the alarm limit before the associated active alarm condition clears. 21 HI_HI_LIM Upper Limit N/A Alarm Limits The setting of the alarm limit used to detect the HI_HI alarm condition. 23 HI_LIM 25 LO_LIM Upper Limit N/A Warning Limits Lower Limit N/A Warning Limits The setting of the alarm limit used to detect the HI alarm condition. The setting of the alarm limit used to detect the LO alarm condition. 27 LO_LO_LIM Lower Limit N/A Alarm Limits The setting of the alarm limit used to detect the LO_LO alarm condition. 30 HI_HI_ALM 31 HI_ALM Upper Limit N/A Alarm Upper Limit N/A Warning The HI_HI alarm data. The HI alarm data 2051 Pressure Transmitter 83 PROFIBUS® PA Block Information May 2024 Reference Manual 00809-0300-4101 Table B-3: Analog Input Block Parameters (continued) Index Parameter name DTM name 32 LO_ALM 33 LO_LO_ALM 34 SIMULATE Lower Limit Warning Lower Limit Alarm Simulation (1) If blank, parameter is not applicable to LOI. LOI Definition location(1) N/A The LO alarm data. N/A The LO_LO alarm data. N/A A group of data that contains the simulated transducer value and status, and the enable/disable bit. B.2 Condensed status The Rosemount 2051 device utilizes condensed status as recommended by the Profile 3.02 specification and NE 107. Condensed status has some additional bits and changed bit assignments from classic status. Confirm bit assignment using Table B-4 and Table B-5. Table B-4: Diagnosis Descriptions Device related diagnosis Byte-bit Unit_Diag_Bit Diagnostic description 2-4 36 2-3 35 3-2 42 3-0 40 Cold Start Warm Start Function Check Maintenance Alarm 4-7 55 More Information Available Table B-5: Output Status Bit Definition Description Bad - passivated Bad, maintenance alarm, more diagnostics available Bad, process related - no maintenance Uncertain, substitute set Uncertain, process related, no maintenance Good, ok Good, update event Good, advisory alarm, low limit Good, advisory alarm, high limit Good, critical alarm, low limit Good, critical alarm, high limit Good, function check HEX 0x23 0x24 0x28 0x4B 0x78 0x80 0x84 0x89 0x8A 0x8D 0x8E 0xBC DECIMAL 35 36 40 75 120 128 132 137 138 141 142 188 84 Emerson.com/Rosemount Reference Manual 00809-0300-4101 May 2024 2051 Pressure Transmitter 85 00809-0300-4101 Rev. BC 2024 For more information: www.emerson.com ©2024 Emerson. All rights reserved. Emerson Terms and Conditions of Sale are available upon request. The Emerson logo is a trademark and service mark of Emerson Electric Co. Rosemount is a mark of one of the Emerson family of companies. All other marks are the property of their respective owners.Antenna House PDF Output Library 7.3.1863