Dwyer SN Vane In-Line Variable Area Flowmeter Control Boxes with Transmitters
Specifications
- Series: SN/SM/SH, MN/MM/MH, LN/LE, XHF
- Type: Standard Vane In-Line Variable Area Flowmeter Control Boxes with Transmitters
Installation
- Ensure the area where the flowmeter will be installed is clean and free from any obstructions.
- Identify the appropriate model from the series mentioned in the specifications.
- Follow the detailed installation guidelines provided in the manual for the specific model.
Operation
- Once installed, connect the flowmeter to the power source as per the provided instructions.
- Turn on the device and follow the calibration steps outlined in the manual to ensure accurate readings.
- Monitor the flow readings displayed on the transmitter and take necessary actions based on the data.
FAQ
Q: How do I calibrate the flowmeter?
A: Calibration instructions are provided in the manual specific to your model. Follow those guidelines carefully to calibrate the flowmeter accurately.
SERIES SN/SM/SH, MN/MM/MH, LN/LE, XHF
STANDARD VANE
IN-LINE VARIABLE AREA FLOWMETER CONTROL BOXES WITH TRANSMITTERS
Installation and Operation Manual
General Vane Piston Switch Manual
Installation and Operation Manual for series: LL, LP, LH, SN, SM, SH, MN, MM ,MH, SX and MX for A, L or Z control boxes with 0, 1 or 2 switches.
NAMEPLATES AND PRODUCT ID
This manual applies to all vane/piston meters that have one of the designators in the model codes shown in the table shown below. This can be seen on the name plate example.
Table 1: Model code designations for zero, one, two switches
| A0 | L0 | Z0 |
| A1 | L1 | Z1 |
| A1B | L1B | Z1B |
| A3 | L3 | Z3 |
| A61 | L61 | Z61 |
| A71 | L71 | Z71 |
| A3 | L3 | Z3 |
| A4 | L4 | Z4 |
| A62 | L62 | Z62 |
| A72 | L72 | Z72 |
| A2 | L2 | Z2 |
WARNING: This instrument was made for the specific use stated at the time of order. Any other use may cause injury. Read instructions before using the device.
Supply Connections—Wire Sizes: Wire used to connect any Switches included must be in accordance with all local and national codes. Wire size and insulation ratings should support actual loads. See also Switch Ratings below. In all cases, wire must be, as a minimum, 20 AWG Teflon insulated rated at 600V and 200°C. It is recommended to include a disconnect switch or circuit breaker near this equipment.
Electrical Switch Ratings:
| Switch Identification | Switch Description | Electrical Ratings |
| Model Code Designator: 1 or 2 | SPDT – (3 wire)
(1 or 2 switches may be provided) |
15A – 125VAC, 250VAC, 480VAC; ⅛HP – 125VAC, ¼HP – 250VAC |
| Model Code Designator: 1B or 2B | SPDT – (3 wire) High Vibration | 20A – 125VAC, 250VAC, 480VAC; ½A –
125VDC, ¼A -250VDC; 1HP – 125VAC, 2HP – 250VAC |
| Model Code Designator: 61 or 62 | SPDT –
High Temperature |
15A – 125VAC, 250VAC, 480VAC; ½A –
125VDC, ¼A -250VDC; ⅛HP – 125VAC, ¼HP – 250VAC |
| Model Code Designator: 71 or 72 | SPDT –
Gold Contact |
15A – 125VAC, 250VAC, 480VAC; ⅛HP –
125VAC, ¼HP – 250VAC |
| Model Code Designator: 3 or 4 | SPDT – (4 wire) Single-Break Form Z | 15A – 125VAC, 250VAC, 480VAC; 1A –
125VDC, ½A -250VDC; ¼HP – 125VAC, ½HP – 250VAC |
Installation
For best results, the meters may be installed in any position as long as proper piping installation requirements are observed. This includes sufficient support of adjacent piping to minimize the system’s inherent vibration. Unions of the same pipe size and full port isolation ball valves may be installed for ease of removal and servicing of equipment, if necessary.
If Teflon® tape or pipe sealant is used, the user must ensure that no loose parts become wrapped around the bluff or the flow sensor when the flow starts.
Vane/Piston AX/H
Installation and Operation Manual Series: LL, LP, LH, SN, SM, SH, MN, MM, MH, SX and MX Used with control boxes: A, L, or Z with 4-20 mA
Maximum Dimensions
Quick Set Up
Wiring Using Pre-Installed Wires:
Complete the loop circuit using the 2 pre-installed 18”, 22AWG wires provided.
IMPORTANT: Observe polarity—The red wire is positive (+), and the black wire is negative (-).
Wiring Removing Pre-Installed Wires:
Open cover and remove pre-installed wires. Connect a twisted wire pair (not provided) to the terminals observing the polarity marked on the PC board. The units are shipped with a red wire connected to the positive (+) terminal, and a black wire connected to the negative (-) terminal. The wire may be up to AWG 14 size, but no smaller than AWG22.
Introduction to HART® Field Device Specifications
Scope
The Universal Flow Monitors water flow transmitter, model ME Transmitter complies with HART Protocol Revision 7.0. This document specifies all the device-specific features and documents HART Protocol implementation details (e.g., the Engineering Unit Codes supported). The functionality of this Field Device is described sufficiently to allow its proper application in a process and its complete support in HART capable Host Applications.
Purpose
This specification is designed to complement other documentation (e.g., the installation manuals specific to SN/SM/SH, MN/MM/MH/, LL/LP/LH, LN/LE and XHF model flow meters) by providing a complete, unambiguous description of this Field Device from a HART Communication perspective
Who Should Use this Document?
The specification is designed to be a technical reference for HART capable Host Application Developers, System Integrators and knowledgeable End Users. It also provides functional specifications (e.g., commands, enumerations and performance requirements) used during Field Device development, maintenance and testing. This document assumes the reader is familiar with HART Protocol requirements and terminology.
Abbreviations and Definitions
- ADC Analog to Digital Converter
- CPU Central Processing Unit (of microprocessor)
- DAC Digital to Analog Converter
- EEPROM Electrically-Erasable Read-Only Memory
- ROM Read-Only Memory
- PV Primary Variable
- SV Secondary Variable
- HCF HART Communication Foundation
- FSK Frequency Shift Keying Physical Layer
Process Interface
Magnetic Sensors
There are two built-in hall-effect sensors measuring the rotation of a permanent magnet that is mounted onto the flowmeter shaft. As the shaft rotates with flow, the sensors provide analog readings that are in turn converted to a digital value by and A/D converter. The digital values are then processed by the microcontroller and linearized, and subsequently converted to a scaled analog output via a D/A converter in the range of 4 to 20 mA.
Host Interface Analog Output 1: Process Flow
The two-wire 4-20mA current loop is connected to two terminals on the transmitter circuit board. Depending on the product used, one of the two configurations are offered for field wiring.
The first option allows the user to directly connect the loop wires to the terminals on the PCB. The correct polarity is shown in the pictures below, where the red wire is connected to the (+) terminal and the black wire is connected to the (–) terminal.
Dynamic Variables
Two Dynamic Variables are implemented.
Table 3: Dynamic Variables table
| Meaning | Units | |
| PV | Volumetric Flow Reading | GPM, CMH,
LPM |
| SV | Totalizer Value based on PV | Follows PV Units |
The PV is derived using a calibrated linearization table applied to A/D converter readings of hall-effect sensors.
The SV is based on a 5ms timer and is updated based on the current reading of flow.
Both PV and SV values are smoothed.
Status Information
Table 4: Device Status table
| Bit Mask | Definition | Conditions to set bit |
| 0x80(bit 7) | Device Malfunction | None |
| 0x40(bit 6) | Configuration Changed | Any change in device configuration |
| 0x20(bit 5) | Cold start | Set any time power is cycled |
| 0x10(bit 4) | More Status Available | Triggers when either alarm is active |
| 0x08(bit 3) | Loop Current Fixed | None |
| 0x04(bit 2) | Loop Current Saturated | Occurs when loop current reaches upper limit |
| 0x02(bit 1) | Non-Primary Variable out of limits | None |
| 0x01(bit 0) | Primary Variable Out of limits | Occurs when PV is being limited due to exceeding calibrated limitations |
When Bit 4 is set, Host should send Command 48 to determine which alarm is active.
Additional Device Status (Command #48)
Command #48 returns 9 bytes of data, with the following status information:
Table 5: Device Specific Status Byte 0 table
| Bit Mask | Description | Conditions |
| 0x80 | Undefined | NA |
| 0x40 | Undefined | NA |
| 0x20 | Undefined | NA |
| 0x10 | Undefined | NA |
| 0x08 | Undefined | NA |
| 0x04 | Undefined | NA |
| 0x02 | High Alarm | High Alarm is active if set |
| 0x01 | Low Alarm | Low Alarm is active if set |
Burst Mode
This Field Device does not support Burst Mode.
Catch Device Variable
This Field Device does not support Catch Device Variable.
Device-Specific Commands
The following device-specific commands are implemented:
- 128 Read Alarm Setpoints
- 129 Write Low Alarm Setpoint
- 130 Write High Alarm Setpoint
- 131 Reset Totalizer
Command #128: Read Alarm Setpoints
Reads the High and Low Alarm Setpoints. If zero, the alarm is disabled.
Request Data Bytes
Table 6: Request Data Bytes table
| Byte Format Description |
| None |
Response Data Bytes
Table 7: Response Data Bytes table
| Byte | Format | Description |
| 0 | Enum | PV Unit value |
| 1-4 | Float | High Alarm Setpoint |
| 5-8 | Float | Value of High Alarm Setpoint |
Command #129: Write Low Alarm Setpoint
Writes the setpoint for the Low Alarm.
Request Data Bytes
Command #131: Reset Totalizer
Resets the totalizer to zero.
Request Data Bytes
Table 11: Request Data Bytes table
| Byte | Format | Description | |
| 0-3 | Float | Low Alarm Setpoint | |
Response Data Bytes
Table 12: Response Data Bytes table
| Byte Format Description |
| None |
Command-Specific Response Codes
Table 13: Command-Specific Response Codes table
| Code | Class | Description |
| 0 | Success | No Command-Specific Errors |
| 1-15 | Undefined | |
| 16 | Error | Access Restricted |
| 17-31 | Undefined | |
| 32 | Error | Busy |
| 33-127 | Undefined |
Performance
Sampling Rates
Typical sampling rates are shown in the following table.
Table 14: Sampling Rates table
| PV digital value calculation | 10 per second |
| SV digital value calculation | 10 per second |
| Analog output update | 10 per second |
Power-Up
The device is typically ready within 1 second of power-up. Totalizer is initialized to zero.
Reset
Command 42 (“Device Reset”) causes the device to reset its microcontroller. The resulting restart is identical to the normal power up sequence.
Self-Test
Self-Test is not supported.
Command Response Times
Table 15: Command Response Times table
| Minimum | 20ms |
| Typical | 50ms |
| Maximum | 100ms |
Annex A: Capability Checklist
| Manufacturer, model and revision | Universal Flow, ME Transmitter, Rev1 |
| Device type | Transmitter |
| HART revision | 7.0 |
| Device Description available | No |
| Number and type of sensors | 2 internal |
| Number and type of actuators | 0 |
| Number and type of host side signals | 1: 4 – 20mA analog |
| Number of Device Variables | 4 |
| Number of Dynamic Variables | 2 |
| Mappable Dynamic Variables? | No |
| Number of common-practice commands | 5 |
| Number of device-specific commands | 4 |
| Bits of additional device status | 2 |
| Alternative operating modes? | No |
| Burst mode? | No |
| Write-protection? | No |
Vane/Piston AXØ
Installation and Operation Manual Series: LL, LP, LH, SN, SM, SH, MN, MM ,MH, SX and MX for A, L or Z control boxes with transmitter.
Maximum Dimensions
Nameplates and Product ID
This manual applies to all vane/piston meters that have the designator “AX0”, “LX0” or “ZX0” in the model code. This can be seen on the name plate as shown below. 
Vane/Piston RX/H
Installation and Operation Manual Series: LL, LP, LH, SN, SM, SH, MN, MM, MH, SX, MX, LN, LE and XHF Used with R control boxes with 4-20 mA transmitter or HART and optional mechanical switches.
Maximum Dimensions
Installation
For best results, the meters may be installed in any position as long as proper piping installation requirements are observed. This includes sufficient support of adjacent piping to minimize the system’s inherent vibration. Unions of the same pipe size and full port isolation ball valves may be installed for ease of removal and servicing of equipment, if necessary.
References
HART Smart Communications Protocol Specification. HCF_SPEC-12. Available from the HCF. Installation manuals specific to SN/SM/SH, MN/MM/MH/LL/LP/LH,LN/LE and XHF model flow meters as manufactured by Universal Flow Monitors, Inc.
Device Identification
Product Overview
The ME Transmitter is a two-wire loop-powered flow transmitter, with a 4-to-20mA output. This transmitter uses a non-contact magnetic encoder for measuring the displacement of the shaft/pointer on standard UFM flowmeters. It is an add-on feature to SN/SM/SH,MN/MM/MH,LL/LP/LH,LN/LE and XHF model flow meters as manufactured by Universal Flow Monitors, Inc. The ME Transmitter replaces the earlier models Digital Transmitters that utilized a potentiometer, providing improved accuracy while maintaining 100% compatibility. The analog output of this device is linear with flow over the working range of all supported flowmeters.
Process Interface
Magnetic Sensors
There are two built-in hall-effect sensors measuring the rotation of a permanent magnet that is mounted onto the flowmeter shaft. As the shaft rotates with flow, the sensors provide analog readings that are in turn converted to a digital value by and A/D converter. The digital values are then processed by the microcontroller and linearized, and subsequently converted to a scaled analog output via a D/A converter in the range of 4 to 20 mA.
Host Interface: Process Flow
The two-wire 4-20mA current loop is connected to two terminals on the transmitter circuit board. Depending on the product used, one of the two configurations are offered for field wiring.
A secondary terminal strip away from the PCB (mounted in a separate compartment of the flowmeter) and is marked L+ and L-. The red wire connects the (+) terminal on the PCB to L+ and the black wire connects the (–) terminal on the PCB to L-.
This is the only output from this transmitter, representing the process flow measurement, linearized and scaled according to the configured range of the instrument. This output corresponds to the Primary Variable. HART Communication is supported on this loop.
A guaranteed linear over-range is provided. The up-scale current of 24mA can indicate device malfunction. Current values are shown in the table below.
Table 17: Current Values table
| Direction | Values (percent of range) | Values (mA or V) | |
|
Linear over-range |
Down | 0% ± 0.5% | 3.92 to 4.08 mA |
| Up | +106.25% ± 0.1% | 20.84 mA to 21.16 mA | |
| Device malfunction indication | Down | N/A | N/A |
| Up | +125.0% ± 0.1% | 23.98 mA to 24.02 mA | |
| Maximum current | +106.25% ± 1% | 20.84 mA to 21.16 mA | |
| Multi-Drop current draw | 4.0 mA | ||
| Lift-off voltage | 10.5 V | ||
Status Information
| Bit Mask | Definition | Conditions to set bit |
| 0x80(bit 7) | Device Malfunction | None |
| 0x40(bit 6) | Configuration Changed | Any change in device configuration |
| 0x20(bit 5) | Cold start | Set any time power is cycled |
| 0x10(bit 4) | More Status Available | Triggers when either alarm is active |
| 0x08(bit 3) | Loop Current Fixed | None |
| 0x04(bit 2) | Loop Current Saturated | Occurs when loop current reaches upper limit |
| 0x02(bit 1) | Non-Primary Variable out of limits | None |
| 0x01(bit 0) | Primary Variable Out of limits | Occurs when PV is being limited due to exceeding calibrated limitations |
When Bit 4 is set, Host should send Command 48 to determine which alarm is active.
Extended Device Status
The Field Device cannot predict, in advance, when the maintenance will be required. Extended Device Status is unused.
Table 19: Command 48-Byte Data
| Byte | Description | Data |
| 0-5 | Device Specific Status | Only Byte 0 is used |
| 6 | Extended Device Status | Bit 1 will be set when an alarm condition is active. |
| 7 | Device Operating Mode | 0 |
| 8 | Standard Status 0 | Not used |
“Not used” bits are always set to 0.
Device does not support extended device status, all device status activity is included in the device status byte.
Universal Commands
All Universal Commands are supported as specified in the HART Universal Command Specification.
Common-Practice Supported Commands
The following common-practice commands are implemented:
- 33 Read Device Variables
- 35 Write Range Values
- 42 Perform Master Reset
- 44 Write PV Units
- 54 Read Device Variable Information
In command 54 the acquisition period is unused. Values are typically updated every 100ms.
Command-Specific Response Codes
Table 20: Command-Specific Response Codes
| Code | Class | Description |
| 0 | Success | No Command-Specific Errors |
| 1-15 | Undefined | |
| 16 | Error | Access Restricted |
| 17-31 | Undefined | |
| 32 | Error | Busy |
| 33-127 | Undefined |
Command #130: Write High Alarm Setpoint
Writes the setpoint for the High Alarm.
Request Data Bytes
Table 21: Request Data Bytes table
| Byte | Format | Description | |
| 0-3 | Float | High Alarm Setpoint | |
Response Data Bytes
Table 22: Response Data Bytes table
| Byte | Format | Description | |
| 0 | Enum | PV Unit value | |
| 1-4 | Float | High Alarm Setpoint | |
Command-Specific Response Codes
Table 23: Command-Specific Response Codes table
| Code | Class | Description |
| 0 | Success | No Command-Specific Errors |
| 1-15 | Undefined | |
| 16 | Error | Access Restricted |
| 17-31 | Undefined | |
| 32 | Error | Busy |
| 33-127 | Undefined |
Tables
Flow Unit Codes
Subset of HART Common Unit Codes
Table 24: Flow Unit Codes table
| 16 | Gallons Per Minute (GPM) |
| 17 | Liters Per Minute (LPM) |
| 19 | Cubic Meters Per Hour (CMH) |
Unit Conversion
Internally, the transmitter uses Gallons per Minute. Conversions are made using a floating point factor. Values are directly converted from GPM when possible, however Alarm values changed between units are converted from stored unit value:
Table 25: Unit Conversion table
| New Unit | Previous Unit | Factor |
| GPM | LPM | 0.2642 |
| CMH | 4.403 | |
| LPM | GPM | 3.785 |
| CMH | 16.666 | |
| CMH | GPM | 0.2271 |
| LPM | 0.06 |
Performance
Busy and Delayed-Response
Device busy is not used. Delayed-response is not used.
Long Messages
The largest data field used is in the response to Command 21: 34 bytes including the two status bytes.
Non-Volatile Memory
EEPROM is used to hold the device’s configuration parameters. New data is written within 100ms of command receipt.
Modes
Fixed current mode is not implemented.
Write Protection
Write-protection is not implemented.
Damping
Damping is not implemented.
Annex b. Default Configuration
Default configuration is based on a unit-by-unit basis.
ane/Piston TX/H
Installation and Operation Manual Series: LL, LP, LH, SN, SM, SH, MN, MM, MH, SX, MX, LN, LE and XHF Used with T control boxes with 4-20 mA transmitter or HART and optional mechanical switches.
Maximum Dimensions
Installation
For best results, the meters may be installed in any position as long as proper piping installation requirements are observed. This includes sufficient support of adjacent piping to minimize the system’s inherent vibration. Unions of the same pipe size and full port isolation ball valves may be installed for ease of removal and servicing of equipment, if necessary.
Device Identification
Product Overview
The ME Transmitter is a two-wire loop-powered flow transmitter, with a 4-to-20mA output. This transmitter uses a non-contact magnetic encoder for measuring the displacement of the shaft/pointer on standard UFM flowmeters. It is an add-on feature to SN/SM/SH,MN/MM/MH,LL/LP/LH,LN/LE and XHF model flow meters as manufactured by Universal Flow Monitors, Inc. The ME Transmitter replaces the earlier models Digital Transmitters that utilized a potentiometer, providing improved accuracy while maintaining 100% compatibility. The analog output of this device is linear with flow over the working range of all supported flowmeters.
Process Interface
- Magnetic Sensors
There are two built-in hall-effect sensors measuring the rotation of a permanent magnet that is mounted onto the flowmeter shaft. As the shaft rotates with flow, the sensors provide analog readings that are in turn converted to a digital value by and A/D converter. The digital values are then processed by the microcontroller and linearized, and subsequently converted to a scaled analog output via a D/A converter in the range of 4 to 20 mA. - Host Interface: Process Flow
The two-wire 4-20mA current loop is connected to two terminals on the transmitter circuit board. Depending on the product used, one of the two configurations are offered for field wiring.
A secondary terminal strip away from the PCB (mounted in a separate compartment of the flowmeter) and is marked L+ and L-. The red wire connects the (+) terminal on the PCB to L+ and the black wire connects the (–) terminal on the PCB to L-.
This is the only output from this transmitter, representing the process flow measurement, linearized and scaled according to the configured range of the instrument. This output corresponds to the Primary Variable. HART Communication is supported on this loop.
A guaranteed linear over-range is provided. The up-scale current of 24mA can indicate device malfunction. Current values are shown in the table below.
Table 26: Current Values table
| Direction | Values (percent of range) | Values (mA or V) | |
|
Linear over-range |
Down | 0% ± 0.5% | 3.92 to 4.08 mA |
| Up | +106.25% ± 0.1% | 20.84 mA to 21.16 mA | |
| Device malfunction indication | Down | N/A | N/A |
| Up | +125.0% ± 0.1% | 23.98 mA to 24.02 mA | |
| Maximum current | +106.25% ± 1% | 20.84 mA to 21.16 mA | |
| Multi-Drop current draw | 4.0 mA | ||
| Lift-off voltage | 10.5 V | ||
Status Information
Table 27: Device Status table
| Bit Mask | Definition | Conditions to set bit |
| 0x80(bit 7) | Device Malfunction | None |
| 0x40(bit 6) | Configuration Changed | Any change in device configuration |
| 0x20(bit 5) | Cold start | Set any time power is cycled |
| 0x10(bit 4) | More Status Available | Triggers when either alarm is active |
| 0x08(bit 3) | Loop Current Fixed | None |
| 0x04(bit 2) | Loop Current Saturated | Occurs when loop current reaches upper limit |
| 0x02(bit 1) | Non-Primary Variable out of limits | None |
| 0x01(bit 0) | Primary Variable Out of limits | Occurs when PV is being limited due to exceeding calibrated limitations |
When Bit 4 is set, Host should send Command 48 to determine which alarm is active.
Extended Device Status
The Field Device cannot predict, in advance, when the maintenance will be required. Extended Device Status is unused.
Table 28: Command 48-Byte Data
| Byte | Description | Data |
| 0-5 | Device Specific Status | Only Byte 0 is used |
| 6 | Extended Device Status | Bit 1 will be set when an alarm condition is active. |
| 7 | Device Operating Mode | 0 |
| 8 | Standard Status 0 | Not used |
“Not used” bits are always set to 0.
Device does not support extended device status, all device status activity is included in the device status byte.
Universal Commands
All Universal Commands are supported as specified in the HART Universal Command Specification.
Common-Practice Supported Commands
The following common-practice commands are implemented:
- 33 Read Device Variables
- 35 Write Range Values
- 42 Perform Master Reset
- 44 Write PV Units
- 54 Read Device Variable Information
- In command 54 the acquisition period is unused. Values are typically updated every 100ms.
Burst Mode
This Field Device does not support Burst Mode.
Catch Device Variable
This Field Device does not support Catch Device Variable.
Device-Specific Commands
The following device-specific commands are implemented:
- 128 Read Alarm Setpoints
- 129 Write Low Alarm Setpoint
- 130 Write High Alarm Setpoint
- 131 Reset Totalizer
Command #129: Write Low Alarm Setpoint
Writes the Setpoint for the Low Alarm.
Request Data Bytes
Table 29: Request Data Bytes table
| Byte | Format | Description |
| 0-3 | Float | Low Alarm Setpoint |
Response Data Bytes
Table 30: Response Data Bytes table
| Byte | Format | Description |
| 0 | Enum | PV Unit value |
| 1-4 | Float | Low Alarm Setpoint |
Command-Specific Response Codes
Table 31: Command-Specific Response Codes table
| Code | Class | Description |
| 0 | Success | No Command-Specific Errors |
| 1-15 | Undefined | |
| 16 | Error | Access Restricted |
| 17-31 | Undefined | |
| 32 | Error | Busy |
| 33-127 | Undefined |
Command #131: Reset Totalizer
Resets the totalizer to zero.
Request Data Bytes
Table 32: Request Data Bytes table
| Byte Format Description |
| None |
Response Data Bytes
Table 33: Response Data Bytes table
| Byte Format Description |
| None |
Command-Specific Response Codes
Table 34: Command-Specific Response Codes table
| Code | Class | Description |
| 0 | Success | No Command-Specific Errors |
| 1-15 | Undefined | |
| 16 | Error | Access Restricted |
| 17-31 | Undefined | |
| 32 | Error | Busy |
| 33-127 | Undefined |
Performance
Sampling Rates
Typical sampling rates are shown in the following table.
Table 35: Sampling Rates table
| PV digital value calculation | 10 per second |
| SV digital value calculation | 10 per second |
| Analog output update | 10 per second |
Power-Up
The device is typically ready within 1 second of power-up. Totalizer is initialized to zero.
Reset
Command 42 (“Device Reset”) causes the device to reset its microcontroller. The resulting restart is identical to the normal power up sequence. (See Section 5.7.2.)
Self-Test
Self-Test is not supported.
Command Response Times
Table 36: Command Response Times table
| Minimum | 20ms |
| Typical | 50ms |
| Maximum | 100ms |
Annex A: Capability Checklist
Table 37: Capability Checklist table
| Manufacturer, model and revision | Universal Flow, ME Transmitter, Rev1 |
| Device type | Transmitter |
| HART revision | 7.0 |
| Device Description available | No |
| Number and type of sensors | 2 internal |
| Number and type of actuators | 0 |
| Number and type of host side signals | 1: 4 – 20mA analog |
| Number of Device Variables | 4 |
| Number of Dynamic Variables | 2 |
| Mappable Dynamic Variables? | No |
| Number of common-practice commands | 5 |
| Number of device-specific commands | 4 |
| Bits of additional device status | 2 |
| Alternative operating modes? | No |
| Burst mode? | No |
| Write-protection? | No |
Vane/Piston TX/TXL
Installation and Operation Manual Series: LL, LP, LH, PI, SN, SM, SH, MN, MM, MH, SX and MX
Nameplates and Product ID
This manual applies to all vane/piston meters that have the designator “TX0,1,2,3,4 or 61” or “TXL0,1,3,
in the model code. This can be seen on the name plate as shown below.
Figure 32: Terminal Strip for Power and 4-20 mA Signal
A typical 4-20mA wiring diagram is shown below
A guaranteed linear over-range is provided. Device malfunction can be indicated by the up-scale current of 24mA. Current values are shown in the table below.
Table 38: Current Values table
| Direction | Values (percent of range) | Values (mA or V) | |
| Linear over-range | Down | 0% ± 0.5% | 3.92 to 4.08 mA |
| Up | +106.25% ± 0.1% | 20.84 mA to 21.16 mA | |
| Device malfunction indication | Down | N/A | N/A |
| Up | +125.0% ± 0.1% | 23.98 mA to 24.02 mA | |
| Maximum current | +106.25% ± 1% | 20.84 mA to 21.16 mA | |
| Multi-Drop current draw | 4.0 mA | ||
| Lift-off voltage | 10.5 V | ||
- After the last digit is set, continue holding A2 until “SEt” is displayed. If you want to change the first digit again, do not hold A2. Momentarily press and release A2 and the first digit starts blinking again.
- When finished recording the new setpoint (“SEt” is displayed), release A2.
- Note 1: Valid setpoint range is 0-100% of full-scale flow. If the alarm value is set higher than full-scale, it is clamped at full-scale upon exiting this menu.
- Note 2: To disable the alarm, set its value to zero.
- Note 3: The red ALARM 1 LED comes on when flow exceeds this setpoint. This LED is in series with the drive circuit for the high-alarm open-collector output, meaning that the output transistor is active whenever this LED is on. Some models do not have any external wiring that connects to the alarm transistor (see Model Codes).
In this example, the high alarm had been set for 80.0; therefore, the red LED was activated when flow reached 80.1.
The LED turns off when flow < (setpoint – hysteresis). Hysteresis is 5% of full-scale.
Set Low Flow Alarm
- Press A2 until “LFLo” is displayed, then release A2.
UNRESTRICTED
Documents / Resources
 |
Dwyer SN Vane In-Line Variable Area Flowmeter Control Boxes with Transmitters [pdf] Instruction Manual SN Vane In-Line Variable Area Flowmeter Control Boxes with Transmitters, SN, Vane In-Line Variable Area Flowmeter Control Boxes with Transmitters, Variable Area Flowmeter Control Boxes with Transmitters, Area Flowmeter Control Boxes with Transmitters, Flowmeter Control Boxes with Transmitters, Control Boxes with Transmitters, Boxes with Transmitters, Transmitters |
