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Chapter 1. Installation and Wiring
1.6.2 Oxygen Sample Systems
Oxygen sample systems are required and can be ordered from GE for bench or wall mounting. You can also build your
own sample system by using the following guidelines.
IMPORTANT:
The GE warranty will be voided if the sample system does not have a relief valve.
The basic sample system requirements are as follows (see Figure 2 below):
•
The oxygen cell requires a sample gas flow of 0.5 to 1 LPM (1 to 2 SCFH).
•
The gas pressure in the sample cell must be between 0.0 and 1.0 psig. The pressure must not exceed 1.0 psig.
•
A 10 psig pressure relief valve installed upstream of the oxygen cell is required to prevent over-pressure.
•
A flow meter is required to measure the flow.
•
A pressure gauge is required to measure the pressure.
•
A flow regulating or needle valve is required and should be located upstream of the sample cell.
•
A pressure regulator is required for sample gas supplies of 50 psig or greater.
If a sample pump is required to draw a sample to the oxygen cell, the pump should be installed downstream from the
oxygen cell. You must also install a vacuum relief valve set at 1.0 psig between the oxygen cell and the pump.
Note:
The actual sample system design is dependent on the application requirements.
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Figure 2: A Typical Oxygen Cell Sample System
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moisture.IQ User's Guide
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