Setra 231 Operating Manual
Model 231 Multi-Sense®
Wet-to-Wet Pressure Transducer
978-263-1400; 800-257-3872
www.setra.com; sales@setra.com
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Contents
1.0 GENERAL INFORMATION...................................................................... 4
2.0 MECHANICAL INSTALLATION ............................................................. 4
2.1 Media compatibility........................................................................ 4
2.2 Environment...................................................................................... 4
2.3 Pressure Fittings............................................................................... 5
2.4 Mounting............................................................................................ 5
2.5 Installation Procedures.................................................................. 5
3.0 OPTIONAL 3-VALVE MANIFOLD PROCEDURE............................... 6
4.0 ELECTRICAL INSTALLATION................................................................. 8
4.1 Electrical Termination
Wiring: 2-Wire , 4 to 20 mA and Remote Zero............................. 8
4.2 Electrical Termination
Wiring: 3-Wire, 0 to 5, 0 to 10, 1-5 VDC and Remote Zero........ 9
5.0 OPERATION..............................................................................................10
6.0 RETURNING PRODUCTS FOR REPAIR..............................................11
7.0 WARRANTY AND LIMITATION OF LIABILITY.................................11
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Model 231
Installation Guide
Multi-Sense® Model 231 Series
Wet-to-Wet Differential Pressure Transducers
1.0 GENERAL INFORMATION
Every Model 231 has been calibrated and tested before shipment to guarantee
performance of all pressure ranges.
The Model 231 has field selectable unidirectional and bidirectional pressure
ranges, configurable 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. The Model 231 is factory
calibrated to the highest pressure range. The range label on the side of the unit
indicates the factory calibrated range.
Setra Systems 231 pressure transducers sense differential pressure and convert
this difference in pressure to a proportional high level analog output for unidirectional and bidirectional pressure ranges.
Your Model 231 Multi-Sense pressure transducer has been ordered in one of the
following versions:
Version Unidirectional Bidirectional
MS1 5, 10, 20, 50 psid ±5, ±10, ±20, ±50 psid
MS2 10, 20, 50, 100 psid ±10, ±20, ±50, ±100 psid
MS3 25, 50, 125, 250 psid ±25, ±50, ±125, ±250 psid
2.0 MECHANICAL INSTALLATION
2.1 Media compatibility
Model 231 transducers are designed to be used with any gas or liquid compatible with 17-4 PH stainless steel, The optional 3-valve manifold assembly is
designed to be used with gases or liquids compatible with 360 Brass, Acetal plug
valves and Nitrile O-Rings. Never totally submerge the unit in any liquid.
2.2 Environment
The operating temperature limits of the 231 are as follows:
Compensated T emperature Range °F (°C) +32 to +130 (0 to +54)
Operating Temperature Range °F (°C) -4 to +185 (-20 to +85)
Storage T emperature Range °F (°C) -4 to +185 (-20 to +85)
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