APG PT-500-P30 User manual

APG

Doc #9003999

Part #200245

Rev C, 07/19

PT-500 Modbus Series

User Manual

ii Tel: 1/888/525-7300 • Fax: 1/435/753-7490 • www.apgsensors.com • [email protected]

Table of Contents

Introduction ................................................................................................................ iii

Warranty and Warranty Restrictions.................................................................... iv

Chapter 1: Specications and Options..................................................................... 1

Dimensions ........................................................................................................................................1

Specications ................................................................................................................................... 2

Model Number Congurator.......................................................................................................... 3

Electrical Pinout Table, Power Supply Table, and System Wiring Diagrams..................... 4

Chapter 2: Installation and Removal Procedures and Notes..............................5

Tools Needed..................................................................................................................................... 5

Mounting Instructions ................................................................................................................... 5

Electrical Installation ..................................................................................................................... 5

Removal Instructions ..................................................................................................................... 6

Chapter 3: Programming ............................................................................................6

Modbus Programming .................................................................................................................... 6

Modbus Programming with RST-6001 and APG Modbus Software ...................................... 6

PT-500 Modbus Register Lists .................................................................................................. 7-9

PT-500 Modbus Sensor Parameters - L5 pressure series...................................................... 10

PT-500 Modbus Sensor Parameters - L31 level series ........................................................... 10

PT-500 Modbus Application Parameters - L31 level series ............................................. 11-15

Chapter 4: Maintenance ...........................................................................................16

General Care.................................................................................................................................... 16

Vent Tube Drying......................................................................................................................16-17

Repair and Returns........................................................................................................................ 17

NOTE: Wiring information in this User Manual is specic to the Modbus Series of the

PT-500. If you have a 0-5V, mV/V, or 4-20 mA Series sensor, please consult the factory at

1-888-525-7300, or our website at www.apgsensors.com/support, for the appropriate

manual for your sensor.

iii

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Introduction

Thank you for purchasing a PT-500 modbus series submersible pressure transmitter from APG. We

appreciate your business! Please take a few minutes to familiarize yourself with your PT-500 and this

manual.

PT-500 submersible pressure transmitters oer reliability in harsh industrial conditions. The small size,

integrated electronics, wide operating temperature range, and durability make the PT-500 the perfect

instrument for static and dynamic pressure measurement.

Reading your label

Every APG instrument comes with a label that includes the instrument’s model number, part number, serial

number, and a wiring pinout table. Please ensure that the part number and pinout table on your label

match your order.

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Warranty and Warranty Restrictions

This product is covered by APG’s warranty to be free from defects in material and workmanship under

normal use and service of the product for 24 months. For a full explanation of our Warranty, please visit

https://www.apgsensors.com/about-us/terms-conditions. Contact Technical Support to receive a Return

Material Authorization before shipping your product back.

Scan the QR code below to read the full explanation of our Warranty on your tablet or smartphone.

Tel: 1/888/525-7300 • Fax: 1/435/753-7490 • www.apgsensors.com • [email protected]

Chapter 1: Specications and Options

• Dimensions

PT-500 with Reusable Cage

PT-500 with Removable Plastic

Nose Cone

PT-500 with Tri-clover

Sanitary Fitting

PT-500 with Welded Anti-snag Cage

1.00"

[25.4mm]

Ø.188" THRU

PROTECTIVE

NOSE CONE

7.25"

[184.2mm]

1.44"

[36.6mm]

4.93"

[125.2mm]

0.89"

[22.5mm]

1.00"

[25.4mm]

0.99"

[25.1mm]

1/2" NPTM

REMOVABLE

SENSOR CAGE

ASSEMBLY

3.60"

[91.4mm]

1.67"

[42.4mm]

6.47"

[164.4mm]

0.89"

[22.5mm]

7.36"

[186.9mm]

0.99"

[25.1mm]

1/2" NPT

1.00"

[25.4mm]

NON-REMOVABLE

CAGE ASSEMBLY

1.65"

[41.9mm]

7.19"

[182.5mm]

3.60"

[91.4mm]

0.95"

[24.1mm]

1.00"

[25.4mm]

1/2" NPTM

6.30"

[160.0mm]

0.89"

[22.5mm]

1.98"

[50.3mm]

0.31"

[8.0mm]

5.08"

[129.0mm]

0.89"

[22.5mm]

0.99"

[25.1mm]

1.00"

[25.4mm]

1/2" NPTM

5.96"

[151.5mm]

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Performance

Pressure Ranges 0 to 250 PSI

Digital Output Modbus RTU, 4-wire RS-485

Over Pressure 2X FSO

Burst Pressure 3.0X FSO

1 Year Stability 0.75% FSO

Accuracy

Linearity, Hystereses & Repeatability ±0.25% of Full Scale (BFSL) up to ±0.1% of Full Scale

±1.0% for ≤ 1 psi

Thermal Zero Shift @ 70 °F ±0.045% FSO/°C (±0.025% FSO/°F)

Thermal Span Shift @ 70 °F ±0.045% FSO/°C (±0.025% FSO/°F)

Environmental

Operating Temperature -40 to 85°C / -40 to 185°F

Compensated Temperature

≤ 10 psi: 0º - 60ºC / 32º - 140ºF

> 10 psi: -10º - 70ºC / 14º - 158ºF

Maximum Submersible Depth 575 ft / 175.25 m / 250 psi

Electrical

Supply Voltage (at sensor) 5-28 VDC

Current Draw 2 mA max.

Protection Reverse Polarity and Surge (per IEC 61000-4-5)

Load Limitation R(max) = ((Vs-12V)/0.02A)-(0.042Ω per ft. of cable)

Startup Time 200 ms

Materials of Construction

Wetted Materials 316L Stainless Steel

Anti-snag Cage 316L Stainless Steel

Cable Urethane, PVC, or Hytrel

Protective Nose Cone Delrin

Seal Viton ETP-s

Mechanical

Pressure Connection See model number congurator for complete list

Cable Tensile Strength Up to 200 pounds

Patents

US Patent No. 7,787,330

• Specications

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• Model Number Congurator

Model Number: PT-500_____ - _____ - _____ - _____ - _____ - _____ - _____ - _____ - _____

A B C D E F G H I

A. Cable Type

□ -▲Urethane - Blue

□B Hytrel .31” Ø - Black

□C PVC - Black

□D Hytrel .25” Ø - Black

B. Pressure Range

□Specify range in desired unit of measure

__________ Max Water Depth

575 ft. (175.25 m), 250 psi

C. Standard Units of Measure

□PSI □FTH2O

□INH2O □MMH2O

D. Pressure Type (Venting) Range

□G Gauge (open vent tube) -- 0 - 250 psi

□A Absolute (sealed vent tube) -- 10 - 200 psi

□S Sealed (sealed vent tube) -- 4 - 20 psi

E. Output

□L1▲ 4-20 mA, 2-wire

□L3 0-5V, 4-wire*

□L9 10 mV/V, 4-wire*

□L12 1-5V, 4-wire*

□L21 1-10V, 4-wire*

□L5 Modbus RTU, 4-wire RS-485*†

Pressure reading only

□L31 Modbus RTU, 4-wire RS-485 *†

Level calculations, tank volume

Note: *Indicates this option does not yet have CSA

Approvals.

Note: †Indicates Field Adjustable Zero feature is not

included.

F. NPTM

□E0▲ 1/2” NPTM tting for conduit,with pigtail

□E5 Pigtail without conduit connection

G. Process Connection

□P1▲ 1/2” NPTM with removable plastic nose cone

□P5 1/4” NPTF

□P37 Welded Cage (anti-snag 1 piece tting)

□P38 1-1/2” tri-clover with 3/4” diaphragm

□P39 Reusable Cage (includes P38 tting)

H. Accuracy

Greater than 1 PSI

□N0▲ ±0.25%

□N1 ±0.25% with NIST certication

□N2 ±0.1% with NIST certication

1 PSI and Below

□N3 ±1%

□N4 ±1% with NIST certication

I. Cable Length

□(specify length of cable needed in feet)

Note: ▲Indicates this option is standard.

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• Electrical Pinout Table, Supply Power Table, and System Wiring Diagrams

Pigtail

Modbus

Red + Power

Black - Power

Green B (TX-)

White A (TX+)

Shield Case Gnd

Modbus

Power Supply 5-28 VDC

Power

Supply

+5-28 Vdc

GND Use Shielded Cable

120 Ω

terminating

resistor

120 Ω terminating

resistor at last sensor

V+

B (TX-)

A (TX+)

Sensor 1

GND

V+

B (TX-)

A (TX+)

Sensor 2

GND

V+

B (TX-)

A (TX+)

Sensor 3

GND

Master

Device

RS-485 A (TX+)

RS-485 B (TX-)

PT-500 modbus

series sensor

PT-500 modbus

series sensor

PT-500 modbus

series sensor

Note: PT-500 modbus sensors use

reversed TX+/TX- pins. When connecting

to your system, ensure continuity

of TX- to TX- and TX+ to TX+, rather than

A to A and B to B.

Power

Supply

+5-28 Vdc

GND Use Shielded Cable

Equivalent 120 Ω

terminating resistor

internal to RST-6001

120 Ω terminating

resistor at last sensor

USB to computer

with APG Modbus

software

RST-6001

Modbus

Controller

V+

Sensor 1

GND

V+

Sensor 2

GND

V+

Sensor 3

GND

-5V

PT-500 modbus

series sensor

+5V

PT-500 modbus

series sensor

PT-500 modbus

series sensor

Note: An independent +5-28 Vdc

power supply is required when using

an RST-6001 Modbus Controller. The

RST-6001 can only supply ±5 Vdc, not

the +5-28 Vdc required by the modbus

series PT-500.

Modbus System Wiring with RST-6001

Modbus System Wiring

PT-500 Modbus Series Pinout Table PT-500 Modbus Series Supply Power Table

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Chapter 2: Installation and Removal Procedures and Notes

• Mounting Instructions

Your PT-500 can be mounted in three ways: via NPT process connection, free-hanging suspension, or con-

duit mounted. Mounting your pressure transducer is easy if you follow a few simple steps:

• Never over-tighten the sensor. In all cases, tighten the sensor as little as possible to create an adequate

seal.

• Always use thread tape or sealant compound on tapered threads. Wrap thread tape in the opposite

direction of the threads so it does not unravel as you screw the sensor into place. Unraveling can cause

uneven distribution and seal failure.

• Always start screwing in your sensor by hand to avoid cross-threading. Thread failure can be a problem

if you damage threads by over-tightening them or by crossing threads.

• For suspension mounting the PT-500, drill a 3/16” hole into the 1/2” NPTF to 1/2” NPTF hex coupler

(P/N 511414) and secure it to the 1/2” NPTM coupler tting of the PT-500. Attach a .060” diameter 316L

SS cable of desired length to the hex coupler and secure the steel cable according to your application

requirements.

• Wrench sized appropriately for your PT-500’s process or conduit connection.

• Thread tape or sealant compound for threaded connections.

• Tools Needed

• Attach the wires of your PT-500 to your control system according to the pinout table above.

• Electrical Installation

IMPORTANT: APG modbus equipment uses reversed TX+/TX- pins. When making

connections between APG equipment, ensure continuity of A to A and B to B pins. When

connecting APG modbus equipment to other systems, ensure continuity of TX+ to TX+

and TX- to TX-.

NOTE: If your PT-500 has a vent tube, do not seal, cover, or close the vent tube with

anything other than an APG-provided venting cap or desiccant drying cartridge (See Fig-

ure 4.1 and 4.2). Unapproved seals or covers will prevent proper sensor operation.

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Removing your PT-500 from service must be done with care. It’s easy to create an unsafe situation, or

damage your sensor, if you are not careful to follow these guidelines:

• For sensors installed via NPT process connection, make sure the pressure is completely removed from

the line or vessel. Follow any and all procedures for safely isolating any media contained inside the line

or vessel.

• Remove the sensor with an appropriately sized wrench (per your process connection).

• For suspended sensors, retrieve the sensor from the vessel. Follow any and all procedures for safely

isolating any media contained inside the line or vessel.

• Carefully clean the sensor’s tting and diaphragm of any debris (see General Care) and inspect for

damage.

• Store your sensor in a dry place, at a temperature between -40° F and 180° F.

• Removal Instructions

DANGER: Removing your process connected PT-500 Pressure Transmitter while there

is still pressure in the line could result in injury or death.

PT-500 L5/L31 modbus series sensors use standard Modbus RTU protocol (RS-485). The sensors can only op-

erate as slave devices. Sensor default transmission settings are 9600 Baud, 8 Bits, 1 Stop Bit, No Parity, and

require a minimum delay of 300 ms between transactions to return the contents of all registers. Commands

returning fewer registers will require shorter delays. See PT-500 Modbus Register Lists on pages 7 - 9.

Chapter 3: Programming

• Modbus Programming

NOTE: For more information about Modbus RTU, please visit www.modbus.org.

IMPORTANT: Any contact with the diaphragm can permanently damage the sensor.

Use extreme caution.

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