APG PT-500 Operating Manual

APG

PT-500 Modbus Series

User Manual

Doc #9003999

R

Part #200245

Rev C, 07/19

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.

ii

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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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iii

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.

iv

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Chapter 1: Specications and Options

[91.4mm]

[8.0mm]

• Dimensions

0.99"

[25.1mm]

1/2" NPT

1.00"

[25.4mm]

REMOVABLE

SENSOR CAGE

ASSEMBLY

1.67"

[42.4mm]

3.60"

PT-500 with Reusable Cage

0.99"

[25.1mm]

1/2" NPTM

0.89"

[22.5mm]

0.89"

[22.5mm]

6.47"

[164.4mm]

7.36"

[186.9mm]

0.95"

[24.1mm]

0.89"

[22.5mm]

6.30"

[160.0mm]

7.19"

[182.5mm]

NON-REMOVABLE

CAGE ASSEMBLY

1.65"

[41.9mm]

1/2" NPTM

1.00"

[25.4mm]

3.60"

[91.4mm]

PT-500 with Welded Anti-snag Cage

0.99"

[25.1mm]

0.89"

[22.5mm]

1/2" NPTM

1.00"

[25.4mm]

0.31"

1.98"

[50.3mm]

PT-500 with Tri-clover

Sanitary Fitting

1.00"

[25.4mm]

1/2" NPTM

Ø.188" THRU

PROTECTIVE
NOSE CONE

1.00"

[25.4mm]

5.08"

[129.0mm]

5.96"

[151.5mm]

PT-500 with Removable Plastic

Nose Cone

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4.93"

[125.2mm]

1.44"

[36.6mm]

7.25"

[184.2mm]

1

• Specications

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
Startup Time 200 ms

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

(max)

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

2

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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

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

E. Output

▲

□ L1

□ 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.

4-20 mA, 2-wire

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I. Cable Length

□ (specify length of cable needed in feet)

Note: ▲Indicates this option is standard.

3

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

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

Modbus

Red + Power

Black - Power

Pigtail

Green B (TX-)

White A (TX+)

Shield Case Gnd

Modbus System Wiring

Power
Supply

Master
Device

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.

+5-28 Vdc

GND

RS-485 A (TX+)

RS-485 B (TX-)

120 Ω

terminating
resistor

Use Shielded Cable

PT-500 modbus
series sensor

Sensor 1

V+

B (TX-)

A (TX+)

GND

Modbus

Power Supply 5-28 VDC

PT-500 modbus
series sensor

Sensor 2

V+

B (TX-)

A (TX+)

GND

PT-500 modbus
series sensor

Sensor 3

V+

B (TX-)

A (TX+)

GND

120 Ω terminating

resistor at last sensor

Modbus System Wiring with RST-6001

Modbus

+5-28 Vdc

GND

A

B

-5V

+5V

Equivalent 120 Ω

terminating resistor
internal to RST-6001

PT-500 modbus
series sensor

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USB to computer
with APG Modbus
software

4

Power
Supply

RST-6001

Controller

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.

Sensor 1

V+

B
A

GND

Use Shielded Cable

PT-500 modbus
series sensor

Sensor 2

V+

B

A

GND

PT-500 modbus
series sensor

Sensor 3

V+

B
A

GND

120 Ω terminating

resistor at last sensor

Chapter 2: Installation and Removal Procedures and Notes

• Tools Needed

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

• Thread tape or sealant compound for threaded connections.

• Mounting Instructions

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

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

• Electrical Installation

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



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-.

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5

• Removal Instructions

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.

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



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

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

Use extreme caution.

Chapter 3: Programming

• Modbus Programming

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

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

6

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• Modbus Programming with RST-6001 and APG Modbus Software

APG RST-6001 Modbus Controller can be used in tandem with APG Modbus to program and control up to 20
PT-500 L5 or PT-500 L31 sensors. Through APG Modbus, you can monitor the raw readings from the sensor,
including level or pressure, temperature and battery voltage, or congure the sensor. See PT-500 Modbus
Register Lists on pages 7 - 9.

 NOTE: For APG Modbus programming instructions, or to download APG Modbus soft-

ware, please visit www.apgsensors.com/support.

• PT-500 Modbus Register Lists

Input Registers (0x04)

Register Returned Data

30299 Model Type
30300 Pressure (L5 - PSI; L31 - mmH2O)

30301 N/A

30302 Temperature Reading (in 0C, signed)
30303-30304 Calculated (raw)
30305-30306 N/A

30307 N/A

30308 Battery Voltage
30309 Trip 1 Status

30310 Trip 2 Status

 NOTE: The Calculated Readings will be returned without a decimal place. In order to

obtain the true result, the Decimal Place setting must be taken into account.

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7

Holding Registers (0x03) - PT-500 L5 pressure series

Register Function Value Range

40400 Device Address 1 to 247

40401 Units 0-16
40402 Application Type 0 or 8

40403 N/A

40404 Decimal (Calculated) 0 - 3
40405 Max Pressure *0 - 32,000 PSI
40406 Full Pressure 0 - 32,000 PSI
40407 Zero Oset -15,000 - 30,000 PSI
40408 Pressure Decimal 0 - 3
40409 A/D Gain *1, 2, 4, 8, 16, 32, 64, 128

40410 N/A

40411 Parameter Default 0 = No; 1 = Restore Defaults

40412 Averaging 0 - 10

40413 Calibration Value *-32,767 - 32,767
40414 Calibration Flag *0 - 300

40415 Sample Rate 10 to 1000 milliseconds

40416 Scale *0 - 65,535
40417 Oset -20,000 - 20,000
40418 Voltage Oset -20 - 20
40419 Baud Rate 0 - 3 (2400, 9600, 19200)
40420 Parity 0 - 2 (none, even, odd)
40421 Stop Bit 0 - 1 (0 = 1 stop bit; 1 = 2 stop bits)
40422-40423 Pressure X^3 *N/A
40424-40425 Pressure X^2 *N/A
40426-40427 Pressure X^1 *N/A
40428-40429 Pressure X^0 *N/A
40430 Trip 1 Pressure -15,000 - 30,000 PSI
40431 Trip 1 Window 0 - 30,00 PSI
40432 Trip 1 Type 0 - 29
40433 Trip 2 Pressure -15,000 - 30,000 PSI
40434 Trip 2 Window 0 - 30,00 PSI
40435 Trip 2 Type 0 - 29
40436-40437 Multiplier 0.0010 - 99.9999 (oat)
40438-40439 Description A - Z, 0 - 9, /.-,+* (16 char)
40446 Temperature Oset -20 - 20
40447-40448 Temperature X^3 *N/A
40449-40450 Temperature X^2 *N/A
40451-40452 Temperature X^1 *N/A
40453-40454 Temperature X^0 *N/A

*Setting is factory calibrated. Do not adjust.

8

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Holding Registers (0x03) - PT-500 L31 level series

Register Function Value Range

40400 Device Address 1 to 247

40401 Units 1 = Feet, 2 = Inches, 3 = Meters

40402 Application Type 0 - 11
40403 Volume Units 1 - 7

40404 Decimal (Calculated) 0 - 3
40405 Max Level *0 - 65,535 mm
40406 Full Level 0 - 65,535 mm
40407 Zero Oset 0 - 610 mm
40408 N/A
40409 A/D Gain *1, 2, 4, 8, 16, 32, 64, 128
40410 Specic Gravity 1 - 2,000
40411 Parameter Default 0 = No; 1 = Restore Defaults

40412 Averaging 0 - 10

40413 Calibration Value *0 - 65,535
40414 Calibration Flag *0 - 300

40415 Sample Rate 10 to 1000 milliseconds

40416 Scale *0 - 65,535
40417 Oset -20,000 - 20,000
40418 Voltage Oset -20 - 20
40419 Baud Rate 0 - 3 (2400, 9600, 19200)
40420 Parity 0 - 2 (none, even, odd)
40421 Stop Bit 0 - 1 (0 = 1 stop bit; 1 = 2 stop bits)
40422-40423 Pressure X^3 *N/A
40424-40425 Pressure X^2 *N/A
40426-40427 Pressure X^1 *N/A
40428-40429 Pressure X^0 *N/A
40430 Trip 1 Level 0 - 65,535 (mm)
40431 Trip 1 Window 0 - 65,535 (mm)
40432 Trip 1 Type 0 - 29
40433 Trip 2 Level 0 - 65,535 (mm)
40434 Trip 2 Window 0 - 65,535 (mm)
40435 Trip 2 Type 0 - 29
40436-40437 Parameter 1 0 - 1,000,000 (mm)
40438-40439 Parameter 2 0 - 1,000,000 (mm)
40440-40441 Parameter 3 0 - 1,000,000 (mm)
40442-40443 Parameter 4 0 - 1,000,000 (mm)
40444-40445 Parameter 5 0 - 1,000,000 (mm)
40446 Temperature Oset -20 - 20
40447-40448 Temperature X^3 *N/A
40449-40450 Temperature X^2 *N/A
40451-40452 Temperature X^1 *N/A
40453-40454 Temperature X^0 *N/A

*Setting is factory calibrated. Do not adjust.

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9

• PT-500 Modbus Sensor Parameters - L5 pressure series

40401 - Units

Determines the units of measure for the calculated reading.

0 = PSI 5 = mmH2O† 10 = mmHG‡ 14 = inSW
1 = BAR 6 = cmH2O† 11 = cmHG‡ 15 = ftSW
2 = mBAR 7 = mH2O† 12 = inHG‡ 16 = mSW
3 = kPa 8 = inH2O† 13 = kg/cm
4 = MPa 9 = ftH2O†

†

All H2O pressure measurements @ 20° C.

‡

All HG pressure measurements @ 0° C.

40402 - Application Type

Determines the units of measure for the calculated reading.

0 = Standard (units selected in 40401 are displayed)
8 = Custom (units selected in 40401 and multiplier in 40436-40437 are used to compute desired

units; description in 40438-40439 is label for measurement)

2

• PT-500 Modbus Sensor Parameters - L31 level series

40401 - Units

Determines the units of measure for the calculated reading when Application Type is set to 0, 1, or 7.

1 = Feet 2 = Inches 3 = Meters

40402 - Application Type

Determines the type of calculated reading performed by the sensor.
0 = Distance
1 = Level

2 = Standing Cylindrical Tank with or without Hemispherical Bottom

3 = Standing Cylindrical Tank with or without Conical Bottom
4 = Standing Rectangular Tank with or without Chute Bottom

5 = Horizontal Cylindrical Tank with or without Spherical Ends
6 = Spherical Tank
7 = Pounds (Linear Scaling)
8 = N/A
9 = Vertical Oval Tank
10 = Horizontal Oval Tank

11 = Strapping Chart

10

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40403 - Volume Units

Bottom
Radius

Determines the units of measure for the calculated reading when Application Type is set to 2 - 6 or 9 -11.

1 = Feet3 5 = Liters
2 = Million Feet3 6 = Inches3
3 = Gallons 7 = Barrels
4 = Meters3

• PT-500 Modbus Application Parameters - L31 level series

Application 0 - Distance

Register Function Value Range

40400 Device Address 1 to 247

40401 Units 1 = Feet, 2 = Inches, 3 = Meters

40402 Application Type 0
40403 Volume Units --

40404 Decimal (Calculated) 0 - 3

Application 1 - Level

Register Function Value Range

40400 Device Address 1 to 247

40401 Units 1 = Feet, 2 = Inches, 3 = Meters

40402 Application Type 1
40403 Volume Units --

40404 Decimal (Calculated) 0 - 3

Application 2 - Volume of Standing Cylindrical Tank ± Hemispherical Bottom

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --
40402 Application Type 2
40403 Volume Units 1 - 7

40404 Decimal (Calculated) 0 - 3
40405 Max Level (factory set)
40406 Full Level 0 - 65,535 mm

Full

Level

Diameter

40436-40437 Tank Diameter 0 - 1,000,000 (mm)
40438-40439 Radius of Bottom Hemisphere 0 - 1,000,000 (mm)

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or

11

Application 3 - Volume of Standing Cylindrical Tank ± Conical Bottom

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --
40402 Application Type 3
40403 Volume Units 1 - 7

40404 Decimal (Calculated) 0 - 3
40405 Max Level (factory set)
40406 Full Level 0 - 65,535 mm

40436-40437 Tank Diameter 0 - 1,000,000 (mm)
40438-40439 Cone Diameter (at bottom of cone) 0 - 1,000,000 (mm)
40440-40441 Length (height) of Cone 0 - 1,000,000 (mm)

Application 4 - Volume of Standing Rectangular Tank ± Chute Bottom

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --
40402 Application Type 4
40403 Volume Units 1 - 7

40404 Decimal (Calculated) 0 - 3
40405 Max Level (factory set)
40406 Full Level 0 - 65,535 mm

Full

Level

Full

Level

Tank X

Diameter

Cone

Diameter

Cone

Length

40436-40437 Tank X Dimension 0 - 1,000,000 (mm)
40438-40439 Tank Y Dimension 0 - 1,000,000 (mm)
40440-40441 Chute X Dimension 0 - 1,000,000 (mm)
40442-40443 Chute Y Dimension 0 - 1,000,000 (mm)
40444-40445 Length (height) of Chute 0 - 1,000,000 (mm)

12

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or

Chute
Length

Chute X

Tank Y

Chute Y

Application 5 - Volume of Horizontal Cylindrical Tank ± Hemispherical Ends

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --
40402 Application Type 5
40403 Volume Units 1 - 7

40404 Decimal (Calculated) 0 - 3
40405 Max Level (factory set)
40406 Full Level 0 - 65,535 mm

40436-40437 Tank Length 0 - 1,000,000 (mm)
40438-40439 Tank Diameter 0 - 1,000,000 (mm)
40440-40441 Radius of End Hemispheres 0 - 1,000,000 (mm)

Diameter

End
Radius

Length

Application 6 - Volume of Spherical Tank

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --

40402 Application Type 6

40403 Volume Units 1 - 7

40404 Decimal (Calculated) 0 - 3
40405 Max Level (factory set)
40406 Full Level 0 - 65,535 mm

40436-40437 Tank Diameter 0 - 1,000,000 (mm)

Full

Level

Full

Level

Diameter

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13

Application 7 - Pounds (Linear Scaling)

Register Function Value Range

40400 Device Address 1 to 247

40401 Units 1 = Feet, 2 = Inches, 3 = Meters

40402 Application Type 7
40403 Volume Units --

40404 Decimal (Calculated) 0 - 3
40405 Max Level (factory set)
40406 Full Level 0 - 65,535 mm

40436-40437 Multiplier (linear scalar) 0 - 1,000,000 (1000 = 1.000)

Application 9 - Volume of Vertical Oval Tank

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --

40402 Application Type 9

40403 Volume Units 1 - 7

40404 Decimal (Calculated) 0 - 3
40405 Max Level (factory set)
40406 Full Level 0 - 65,535 mm

40436-40437 Tank Length 0 - 1,000,000 (mm)
40438-40439 Tank Depth 0 - 1,000,000 (mm)
40440-40441 Tank Width 0 - 1,000,000 (mm)

Full

Level

Width

Depth

Length

14

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Application 10 - Volume of Horizontal Oval Tank

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --
40402 Application Type 10
40403 Volume Units 1 - 7

40404 Decimal (Calculated) 0 - 3
40405 Max Level (factory set)
40406 Full Level 0 - 65,535 mm

40436-40437 Tank Length 0 - 1,000,000 (mm)
40438-40439 Tank Depth 0 - 1,000,000 (mm)
40440-40441 Tank Width 0 - 1,000,000 (mm)

Full

Level

Depth

Width

Length

Application 11 - Strapping Chart (Polynomial Values)

Register Function Value Range

40400 Device Address 1 to 247

40401 Units 1 = Feet, 2 = Inches, 3 = Meters

40402 Application Type 11
40403 Volume Units 1 - 7

40404 Decimal (Calculated) 0 - 3
40405 Max Level (factory set)
40406 Full Level 0 - 65,535 mm

40436-40437 X^3 Coecient 0 - 1,000,000
40438-40439 X^2 Coecient 0 - 1,000,000
40440-40441 X^1 Coecient 0 - 1,000,000
40442-40443 X^0 Coecient 0 - 1,000,000

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15

Chapter 4: Maintenance

• General Care

Your PT-500 series pressure transmitter is very low maintenance and will need little care as long as it is

installed correctly. However, in general, you should:

• For process connected sensors, keep the transmitter and the area around it generally clean.

• Avoid applications for which the transmitter was not designed, such as extreme temperatures, contact

with incompatible corrosive chemicals, or other damaging environments.

• Inspect the threads whenever you remove the transmitter from duty or change its location.

• Avoid touching the diaphragm. Contact with the diaphragm, especially with a tool, could permanently

shift the output and ruin accuracy.

• Clean the diaphragm or the diaphragm bore with extreme care. If using a tool is required, make sure it

does not touch the diaphragm.

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



Use extreme caution.

• Vent Tube Drying

Condensation in the vent tube can damage the electronics in your sensor, resulting in unreliable readings.
APG oers two methods of preventing vent tube condensation: a venting cap, and a desiccant drying

cartridge.

The venting cap is a PVC tube with a hydrophobic patch that allows moisture to pass out of the tube without

allowing water in (See Figure 4.1). The cap is sealed by an o-ring, and is easily installed in the eld.

The desiccant drying cartridge with vent tube adapter absorbs any moisture in the vent tube to keep vapor

from condensing (See Figure 4.2). The installation of the desiccant drying cartridge is quick and easy.
Common installation methods are cable tie, Velcro, and cable clamps.

 IMPORTANT: Do NOT use desiccant cartridge in the presence of vapors or liquids con-

taining phosphate esters, synthetic lubricants, hydrocarbon solvents, methanol, acetone,
lacquer solvents, or other organics.

16

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Figure 4.1

Figure 4.2

 NOTE: Desiccant crystals change from blue to pink as they become saturated. Car-

tridge must be replaced when all crystals have saturated.

• Repair and Returns

Should your PT-500 series pressure transmitter require service, please contact the factory via phone, email,
or online chat. We will issue you a Return Material Authorization (RMA) number with instructions.

• Phone: [phone]

• Email: [e-mail]

• Online chat at www.apgsensors.com

Please have your PT-500’s part number and serial number available. See Warranty and Warranty
Restrictions for more information.

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17

APG

R

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Automation Products Group, Inc.