Moisture/Temperature Probe Considerations; Temperature Range; Moisture Condensation - GE Moisture Image Series 1 Startup Manual

June 2004
Moisture/Temperature
Probe Considerations

Temperature Range

Moisture Condensation

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The M Series, TF Series, and Moisture Image Series probes consist of
an aluminum oxide sensor mounted on a connector head. Standard
probe mounts include a protective stainless steel shield.
The probe sensor materials and housing maximize durability and
insure a minimum of water absorbing surfaces in the vicinity of the
aluminum oxide surface. A sintered stainless steel shield is used to
protect the sensor from high flow rates and particulate matter. The
end cap should not be removed except upon advice from GE
Panametrics.
The sensor has been designed to withstand normal shock and
vibration. You should make sure that the active sensor surface is
never touched or allowed to come into direct contact with foreign
objects, since this may adversely affect performance.
Observing these few simple precautions will result in a long and
useful probe life. GE Panametrics recommends that probe calibration
be checked routinely, at 12-month intervals, or as recommended by
our applications engineers for your particular application.
The probe will measure the water vapor pressure in its immediate
vicinity; therefore, readings will be influenced by its proximity to the
system walls, materials of construction, and other environmental
factors.The sensor can be operated under vacuum or pressure, flowing
or static conditions.
Observe the following environmental precautions.
The standard probe is operable from -110°C to +70°C
(-166°F to 158°F).
Be sure the temperature is at least 10°C higher than the dew/frost
point temperature. If this condition is not maintained, moisture
condensation could occur on the sensor or in the sample system,
which will cause reading errors. If this happens, dry out the probe
following the procedures outlined in Appendix A, Application of the
Hygrometer, in the Service Manual.
Installation