American Magnetics 188CPS Point-Sensing Instrument - Manual (Page 22)

21
Operation
Sensor contamination
Cold sensors exposed to humidified air can show erroneous readings due to the fact
that the air contains moisture which can condense between the cold sensing plates. A
small film of water can cause a shorted or partially shorted condition, which results in
false readings. As the sensor warms, the moisture may evaporate and the sensor will
again read correctly. This is a physical phenomenon and does not indicate any
problem with your AMI level equipment. Limit or eliminate exposure of cold sensors
to humidified air to avoid this condition.
If a sensor should require cleaning, flushing with alcohol is recommended. The sensor
should not be used again until all the alcohol has been evaporated. Under no
circumstances should the sensor be disassembled.