PT-400 User Manual

Introduction

Thank you for purchasing a PT-400 series pressure transmitter from APG. This manual provides information to familiarize users with the PT-400. The PT-400 series offers reliability in a wide range of pressures and harsh industrial and hazardous locations. It is certified intrinsically safe for hazardous areas in the US, Canada, Europe, and internationally by CSA, ATEX, and IECEx for Class 1, Zone 0 environments. Its features include small size, integrated electronics, a wide operating temperature range, and durability, making it suitable for static and dynamic pressure measurements with an amplified output signal.

Reading Your Label

Each APG instrument includes a label with the model number, part number, serial number, and a wiring pinout table. Ensure these match your order. Electrical ratings and approvals are also listed on the label; refer to the Certificate of Compliance for details.

Electrical Ratings

General Input/Output: 9 to 28 Volts DC; Outputs: 4-20mA / 0-5VDC / 0-10VDC (per order).

Hazardous Location Certifications:

• US/Canada (CSA): Exia Class I Division 2; Groups C, D T4; Class I, Zone 2, Group IIB; AEx nC IIB T4 / Ex nL IIB T4: Ta: -40°C to 85°C. Maximum Working Pressure: 10,000 PSI.
• PT-400-L1 (4-20mA): Entity parameters: Vmax Ui= 28VDC, Imax Ii = 110mA, Pmax Pi = 0.77W, Ci = 0.055µF, Li = 7.95µH. Installation per drawing 9002794, sheet 2.
• PT-400-L3/L10 (0-5V/0-10V): Entity parameters: Vmax Ui= 28VDC, Imax Ii = 110mA, Pmax Pi = 0.77W, Ci = 0µF, Li = 0µH. Installation per drawing 9002794, sheets 3 & 4.
• US/Canada (CSA): Exia Class I Division 1; Groups C, D T4; Class I, Zone 0, Group IIB; AEx ia IIB T4 / Ex ia IIB T4: Ta: -40°C to 85°C. Maximum Working Pressure: 10,000 PSI. Entity parameters: Vmax Ui= 28VDC, Imax Ii = 110mA, Pmax Pi = 0.77W, Ci = 0.055µF, Li = 7.95µH. Installation per drawing 9002794, sheet 1.

⚠️ IMPORTANT: Installation must follow drawing 9002794 (Intrinsically Safe or Non-Incendive Wiring Diagrams) to meet approvals. Faulty installation invalidates safety approvals and ratings.

Warranty Statement

This product is covered by APG's warranty for 24 months against defects in material and workmanship under normal use. For full details, visit www.apgsensors.com/resources/warranty-certifications/warranty-returns/. Contact Technical Support for a Return Material Authorization (RMA) before shipping.

Chapter 1: Specifications and Options

Dimensions

The PT-400 is available in several configurations, with dimensions detailed below:

• PT-400 with Pigtail and male NPT: Features a coiled cable (pigtail) and male NPT process connection. Total height: 5.80 inches (147.32 mm). Width: 1.50 inches (38.10 mm).
• PT-400 with DIN 43650 and L-Bracket and male NPT: Includes a DIN connector, an L-bracket, and a male NPT process connection. Total height: 4.45 inches (113.03 mm). Width: 1.50 inches (38.10 mm).
• PT-400 with 4 or 6 pin Bayonet on Long Can and female NPT: Features a bayonet connector, a longer cylindrical housing, and a female NPT process connection. Total height: 4.50 inches (114.30 mm). Width: 1.50 inches (38.10 mm).
• PT-400 with 4 or 6 pin Bayonet on Short Can and female NPT: Features a bayonet connector, a shorter cylindrical housing, and a female NPT process connection. Total height: 3.50 inches (88.90 mm). Width: 1.50 inches (38.10 mm).

Specifications

Performance:

• Pressure Ranges: 0 to 30,000 psi
• Analog Output: 4-20mA, 0-5VDC, 0.5-4.5VDC, 1-5VDC, 0-10VDC
• Over Pressure: 2X Full Scale or limit of fitting, whichever is less
• Burst Pressure: 3.0X Full Scale or limit of fitting, whichever is less

Accuracy:

• Linearity, Hysteresis & Repeatability: ±0.25% of Full Scale (BFSL) (1% for pressure ≤ 1 psi)
• Thermal Zero Shift: [±0.036% FSO/°C (±0.02% FSO/°F)]
• Thermal Span Shift: [±0.036% FSO/°C (±0.02% FSO/°F)]

Environmental:

• Operating Temperature: -40°C to 85°C (-40°F to 185°F)
• Compensated Temperature: Varies by pressure range (e.g., 0° - 60°C for ≤ 5 psi; -10° - 70°C for 5 < x ≤ 1000 psi; -17° - 54°C for > 1000 psi)
• Enclosure Protection: IP67

Electrical:

• Supply Voltage (at sensor): 9-28 VDC (varies slightly by output type)
• Output Signal @ 21°C / 70°F: 4-20 mA (3-30 mA max), 0-5 VDC (7mA max), 0-10 VDC (14mA max)

Materials of Construction:

• Wetted Materials: 316L Stainless Steel (≤ 1,000 psi), 17-4 Stainless Steel (> 1,000 psi), Incoloy (10,000 - 30,000 psi)
• Enclosure: 316L Stainless Steel

Mechanical:

• Pressure Connection: See model number configurator
• Weight: 283g (10 oz.)
• Zero & Span Protective Set Screws Torque: 28 oz-in

Model Number Configurator

The PT-400 model number is constructed using the following selections:

A. Operation / Output

• L1: 4-20 mA output
• L3: 0-5 VDC output
• L10: 0-10 VDC output
• L12: 1-5 VDC output
• L20: 0.5-4.5 VDC output

Modbus

• L5: RS-485 (Modbus/RTU), 4-wire (Pressure reading only)
• L31: RS-485 (Modbus/RTU), 4-wire (Level calculations, tank volume)

B. Common Pressure Ranges - PSI

(Ranges: 5, 15, 30, 50, 60, 100, 200, 300, 500, 1000, 2000, 5000, 10000, 30000 psi. Other ranges available.)

C. Units of Measure

(psi, bar, kPa, inH2O, mmH2O, inHG)

D. Pressure Type

• A: Absolute (10 - 200 psi)
• S: Sealed (200 psi - 30,000 psi)
• G: Gauge (≤ 500 psi)
• CG: Compound Gauge (-1 - 1 psi or -15 - 15 psi)

E. Electrical Connection

• E3: 4 pin bayonet (PT 1H-8-4P or equiv.)
• E4: 4 pin M12 micro connector
• E5: Pigtail with cable (specify cable length)
• E6: 4 pin per DIN 43650, short can (mating connector included)
• E17: 6 pin bayonet (PT02E-10-6P)
• E19: 1/2 in male NPT with cable, short can
• E34: Junction Box
• E36: 1/2 in male NPT with 6 in flying leads, long can
• E40: 3 pin bayonet
• E41: Blue Junction Box
• E45: 4 pin minifast Turck
• (Other connectors available; consult factory)

F. Electrical Cable Length

Specify length in 1-ft increments for E5 and E19 options (e.g., E5-10 for 10 ft cable).

G. Process Connection

• P0: 1/4 - 18 male NPT (≤ 10,000 psi)
• P1: 1/2 - 14 male NPT (≤ 10,000 psi)
• P5: 1/4 - 18 female NPT (≤ 15,000 psi)
• P6: 1/2 female NPT (≤ 10,000 psi)
• P38: 1 1/2 in. tri-clover with 3/4 in. diaphragm (≤ 1,000 psi)
• P52: 1 1/2 in. male NPT (≤ 1,000 psi)
• P54: 7/16 - 20 UNJF-3A Male w/ Cone (≤ 1,000 psi)
• P56: F250C High Pressure (10,000 psi - 30,000 psi)
• P57: F562-C40 High Pressure (10,000 psi - 30,000 psi)

H. Accuracy

• 1-5,000 PSI: N0* ±0.25% (1% for pressure ≤ 1 psi); N1* ±0.25% with NIST; N2 ±0.1% with NIST. (*±0.25% available at 10,000 psi for 4-20 mA output only)
• 10,000 PSI: N12 ±0.5%; N13 ±0.5% with NIST

I. Materials

• M1: 316L SS (≤ 1,000 psi)
• M2: 17-4 SS (> 1000 psi)
• M7: Incoloy (10,000 psi - 30,000 psi; P56/P57 only)

J. Compensated Temperature Range

• S0: -17° - 54°C / 0° - 130°F (> 1000 psi)
• S1: -40° - 82°C / -40° - 180°F (> 1,000 psi)
• S3: -34° - 77°C / -30° - 170°F (> 1,000 psi)
• S9: 0° - 60°C / 32° - 140°F (5 < x ≤ 10 psi)
• S10: -10° - 70°C / 14° - 158°F (10 < x ≤ 1000 psi)
• S11: No Temperature Specification (≤ 5 psi) (This option is standard)

Notes: Modbus output requires a long can. Not available with L5/L31 Modbus Output. L1 4-20 mA Output only.

Electrical Connectors, Pinout Table, and Supply Power Table

PT-400 Series Pin Out Table: Describes pin functions for various connectors (6-pin Bayonet, 4-pin Bayonet, 4-pin DIN, 4-pin M12) and wiring types (Cable, Flying Leads) across different output signals (4-20mA, 0-5VDC, 0-10VDC, RS-485). Key pin assignments include +Excitation, -Excitation, Output, N/C, Tx+, Tx-, and Case Ground.

PT-400 Series Supply Power Table: Lists required power supply voltages for each output type: 9-28 VDC for 4-20mA, 0-5/0.5-4.5/1-5 VDC; 12.5-28 VDC for 0-10 VDC; and 9-28 VDC for RS-485.

Chapter 2: Installation and Removal Procedures and Notes

Tools Needed

• Wrench sized appropriately for the PT-400's process connection.
• Thread tape or sealant compound for threaded connections.

Physical Installation Notes

The PT-400 should be installed in an area (indoors or outdoors) meeting these conditions:

• Ambient temperature: -40°C to 85°C (-40°F to +185°F)
• Relative humidity: up to 100%
• Altitude: up to 2000 meters (6560 feet)
• IEC-664-1 Conductive Pollution Degree: 1 or 2
• IEC 61010-1 Measurement Category: II
• Environment free from chemicals corrosive to stainless steel (e.g., NH3, SO2, Cl2).
• Ample space for maintenance and inspection.
• Class II power supply.

Mounting Instructions

1. Ensure the sensor's fitting matches the tank/vessel/pipe fitting. If mismatched, do not install and contact the factory.
2. Avoid over-tightening the sensor, as this can compress the diaphragm and affect pressure response. Tighten only enough to create an adequate seal. For straight threads, tighten until the o-ring compresses, avoiding damage or extrusion.
3. Use thread tape or sealant compound on tapered threads, wrapping in the opposite direction of the threads to prevent unraveling. For straight threads, use an o-ring.
4. Start screwing the sensor by hand to prevent cross-threading.

Electrical Installation

• Verify the PT-400's pinout table matches your order.
• Ensure your electrical system wiring matches the PT-400's pinout table.
• For instruments with connectors, make the connection. For others, attach wires to the terminal strip.

Removal Instructions

? DANGER: Removing the PT-400 Pressure Transmitter while there is still pressure in the line could result in injury or death.

• Ensure pressure is completely removed from the line or vessel. Follow all procedures for safely isolating any contained media.
• Remove the sensor using an appropriately sized wrench.
• Clean the sensor's fitting and diaphragm of debris (see General Care) and inspect for damage.
• Store the sensor in a dry place at a temperature between -40°C and 82°C (-40°F to 180°F).

Chapter 3: Maintenance

General Care

The PT-400 requires low maintenance. General care includes:

• Keeping the transmitter and surrounding area clean.
• Avoiding applications outside its design parameters (e.g., extreme temperatures, incompatible chemicals).
• Inspecting threads when removing or relocating the transmitter.
• Avoiding touching the diaphragm, as contact can shift output and affect accuracy.
• Cleaning the diaphragm or bore with extreme care, ensuring any tool used does not touch the diaphragm.

Zero Trimming

To perform zero trimming:

• Remove protective screw(s) using a 5/64 allen wrench.
• Ensure the transmitter is at 0 psig or 0 psia (vacuum if absolute).
• Adjust the "Z" pot with a jeweler's screwdriver or suitable instrument until the output is 4 mA, 0 V, 0.5 V, or 1 V, depending on the model.
• Replace protective screw(s).

⚠️ IMPORTANT: Do not adjust the "S" (Span) pot during zero trimming. Span adjustment should only be done during recalibration with a known pressure source.

Figure 3.1 shows the Zero & Span adjustment pots.

? DANGER: Protective screws must be replaced using 28 oz-in of torque to create a seal.

Re-Calibration

This procedure requires a pressure source with at least ±0.1% accuracy.

• Ensure the transmitter is at 0 psig or 0 psia (vacuum if absolute) and adjust zero as per zero trimming instructions.
• Apply full scale pressure to the port and adjust the "S" (Span) pot until the full scale signal is reached.
• Re-check zero and re-adjust if necessary.
• Repeat the previous two steps until no further adjustment is required.

? NOTE: The PT-400 can also be returned to the factory for repair and/or adjustment.

Repair and Returns

For service, contact APG via phone, email, or online chat. A Return Material Authorization (RMA) number and instructions will be provided.

• Phone: 888-525-7300
• Email: sales@apgsensors.com
• Online chat: www.apgsensors.com

Have your PT-400's part number and serial number ready. Refer to the Warranty Statement for more information.

Chapter 4: Hazardous Location Installation and Certification

Intrinsically Safe Wiring Diagram (4-20mA Output)

This diagram illustrates the intrinsically safe wiring for installation in Class I, Div. 1, Groups C, D / Class I, Zone 0, Group IIB environments. It details connections between non-hazardous and hazardous areas, typically involving an intrinsically safe barrier. Key parameters for the PT-400 L1 (4-20mA) are listed: Vmax, Ui = 28 Vdc; Imax, Ii = 110mA; Pmax, Pi = 0.77W; Ci = 55nF; Li = 7.95µH. Installation must comply with relevant electrical codes (NEC, ANSI/ISA RP12.6, Canadian Electrical Code).

Non-Incendive Wiring Diagrams

These diagrams show non-incendive wiring for installation in Class I, Division 2, Groups C and D / Class I, Zone 2, Group IIB environments.

• Non-Incendive Wiring Diagram (4-20mA Output): Similar to intrinsically safe setup but for non-incendive classification. Parameters listed are Vmax, Ui = 28 Vdc; Imax, Ii = 110mA; Pmax, Pi = 0.77W; Ci = 55nF; Li = 7.95µH.
• Non-Incendive Wiring Diagram (0-5VDC Output): Parameters listed are Vmax, Ui = 28 Vdc; Imax, Ii = 110mA; Pmax, Pi = 0.77W; Ci = 0µF; Li = 0µH.
• Non-Incendive Wiring Diagram (0-10VDC Output): Parameters listed are Vmax, Ui = 28 Vdc; Imax, Ii = 110mA; Pmax, Pi = 0.77W; Ci = 0µF; Li = 0µH.

All non-incendive installations require connection to suitably certified apparatus and must comply with electrical codes.

CSA Certificate of Compliance

Certificates confirm compliance for APG products, including the PT-400 series, with various hazardous location standards (e.g., Class 2258 03, 2258 83, 2258 04, 2258 84). Specific models like PT-400-L1xxxx and PT-400-L3/L10xxxx are certified for Intrinsically Safe and Non-Incendive systems. The certificates list entity parameters (Vmax, Imax, Pmax, Ci, Li) and conditions of acceptability, such as connection to certified safety barriers or power supplies, and proper conduit sealing.