Setra 231RS Operating Manual

Model 231RS Multi-Sense®

Wet-to-Wet Pressure Transducer

with Remote Sensors

Installation and Operating Instructions

CE

RoHS

978-263-1400; 800-257-3872

www.setra.com; [e-mail]

Contents

1.0 GENERAL INFORMATION........................................................................3

2.0 MECHANICAL INSTALLATION ...............................................................3

2.1 Media compatibility .........................................................................3

2.2 Environment .......................................................................................3

2.3 Pressure Fittings ................................................................................4

2.4 Mounting .............................................................................................4

2.5 Installation Procedures ...................................................................4

3.0 ELECTRICAL INSTALLATION ..................................................................7

3.1 Electrical Termination

Wiring: 2-Wire , 4 to 20 mA and Remote Zero ..............................7

3.2 Electrical Termination

Wiring: 3-Wire, 0 to 5, 0 to 10, 1-5 VDC and Remote Zero ........8

3.3 Remote Sensors Installation...... ....................................................9

4.0 CONFIGURATION ................................................................................... 11

5.0 RETURNING PRODUCTS FOR REPAIR ........................................... 12

6.0 WARRANTY AND LIMITATION OF LIABILITY ..............................12

2

Model 231RS Remote Sensors

Installation and Operating Instructions

Multi-Sense® Model 231RS Series

Wet-to-Wet Dierential Pressure Transducers

Your 231RS w/Conduit or 231RS w/Cable is shipped with the following:

Conduit Version
(231GRSX3MX)

Item Qty Item Qty

Housing 1 Housing 1

Pressure Transducers 2 Pressure Transducers

User Manual 1 Cable Assemblies

1.0 GENERAL INFORMATION

Every Model 231RS has been calibrated and tested before shipment to

guarantee performance of all pressure ranges.

The Model 231RS has eld selectable unidirectional and bidirectional pres­sure ranges, congurable 0 to 5 VDC, 0 to 10 VDC , and 1 to 5 VDC output, true
two-wire 4 to 20 mA output, and auto-zero capability. Each unit is factory cali­brated to the highest pressure range. The range label on the side of the units
indicates the factory calibrated range. (Reminder: Your application’s high-

est line pressure should be ≤ to the highest pressure range of the 231RS
range code you selected when you purchased the 231RS, see Range Codes
in table below, [range codes also listed inside housing cover.).

Model 231RS pressure transducers sense wet-to-wet dierential pressure and
convert this dierence in pressure to a proportional high level analog output.

(231GRSX4MXXX)

User Manual

Cable Version

2

2

1

Your Multi-Sense® Model 231RS pressure transducer has been ordered in one
of the following versions:

Range Code Unidirectional Bidirectional

RS1 5, 10, 25, 50 psid ±5, ±10, ±25, ±50 psid

RS2 7.5, 15, 37.5, 75 psid ±7.5, ±15, ±37.5, ±75 psid
RS3 10, 20, 50, 100 psid ±10, ±20, ±50, ±100 psid
RS4 15, 30, 75, 150 psid ±15, ±30, ±75, ±150 psid
RS5 25, 50, 125, 250 psid ±25, ±50, ±125, ±250 psid

2.0 MECHANICAL INSTALLATION

2.1 Media Compatibility

Model 231RS transducers are designed to be used with any gas or liquid
compatible with 17-4 PH stainless steel. Never totally submerge the unit in
any liquid.

2.2 Environment

The operating temperature limits of the Model 231RS are as follows:
Compensated Temperature Range °F (°C) +32 to +130 (0 to +54)
Operating Temperature Range °F (°C) -4 to +185 (-20 to +85)
Storage Temperature Range °F (°C) -4 to +185 (-20 to +85)

3

2.3 Pressure Fittings

Standard pipe ttings and installation procedures should be used.

Model 231RS have 1/4” -18 NPT male ttings. The high pressure port and low
pressure connections are located on the bottom of the unit, labeled “HI(+)”
and “LO(-)” respectively.

Important:

Each remote sensor is labeled “HIGH PRESSURE SENSOR” or “LOW PRESSURE
SENSOR”. Match up the high pressure sensor to the high pressure electri­cal terminals, and the low pressure sensor to the low pressure electrical
terminals. Otherwise, the performance may not meet the product linearity
specications.

Moisture Precautions

The Model 231RS is provided with a 0.875” DIA. conduit opening for electri­cal termination, intended for a 1/2” I.D. conduit connection. This opening
must be sealed according to standard industry practices in order to prevent
moisture ingress into the Model 231RS.

2.4 Mounting

The Model 231RS can be easily mounted using the two mounting tabs located
on the side of the unit.

2.5 Installation Procedures

For dierential pressure measurements, it is recommended that the pressure
sensor be installed with a valve in each line.

.

Important: The maximum line pressure cannot exceed the maximum
dierential pressure of the sensor.

Valve A*

High

High Pressure

Remote Sensor

Valve A = High Side Valve
Valve B = Low Side Valve

Pipe

*Valves not included.

Model 231RS

Figure 1

4

Low Pressure

Remote Sensor

Pipe

Valve B*

Low