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STT40 / STT70
Maintenance 5-6
5.2.3. Servicing the Dew Point Monitor
The accuracy of the dew point monitor on mini dryer systems depends on proper operation of the
dew point sensor and the control board. The dew point sensor is in the process air stream and is
therefore susceptible to contamination.
Dew point sensor life depends on:
• Air temperature and flow passing over the sensor.
• The amount of fines (dust) in the process air.
• The amount of plasticizer vapor in the process air.
Once every six months, the dryer operator should monitor the initial dew point sensor readings
and establish a periodic replacement schedule as needed.
• Do not attempt to check the continuity or resistance of the dew
point sensor.
The sensor will be destroyed!