Mechanical Installation; Media Compatibility; Environment; Pressure.fitting - Setra Systems 231RS Operating Instructions Manual

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)
Operating temperature range °F(°C)
Storage temperature range °F(°C)
2.3 Pressure fitting
Typically standard pipe fittings and installation procedures should be used.
Model 231RS have 1/4" -18" NPT male fittings. 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 specifications.
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 screws located on the side
of the unit.

2.5 Installation procedures

For differential pressure measurements at high line pressure, it is recommended that the
pressure sensor be installed with a valve in each line, plus a shunt valve across the high and
low (reference) pressure ports as shown.
Important:
Do not exceed maximum range pressure with the total of differential pressure and line
pressure.
±30 to +130 (0 to +54)
-4 to +185 (-20 to +85)
-4 to +185 (-20 to +85)
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