DeFelsko PosiTector DPM v.3.1 Full Manual - Manual (Page 33)

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Troubleshooting Troubleshooting
Most conditions can be cleared with a Hard Reset (pg. 11).
If not, visit our Service & Support page for information on sending
your Gage to us for a no charge evaluation.
See: http://www.defelsko.com/service
When the surface temperature probe is not on a surface, Air
Temperature and Surface Temperature appear to be different
Under normal conditions with the surface probe in air Ta and Ts
should be within the combined tolerance of each sensor (typically
1°C each). It is possible for the difference to be larger if the
surface probe has recently been in contact with surfaces that are
at a different temperature than air.
RH value is slow to stabilize
If the probe is exposed to very low humidity for an extended time
period and then placed in a high humidity environment, the
displayed Relative Humidity (RH) may appear to respond slowly.
Allow the probe to stabilize 30 minutes for a change of RH greater
than 50%. It may take longer if the probe was left at low RH for
several months. To increase response time soak the sensor in a
damp face cloth overnight to recondition the RH sensor.
Surface Temperature reads much higher than expected
The probe tip may be dirty or damaged. Clean the probe tip by
soaking in water or solvent. If Ts continues to read high then return
the probe for service.
Surface temperature value does not agree with expected
surface temperature or surface temperature probe is slow to
respond
In some cases the surface being measured is very rough and a
good thermal connection from the probe tip to the surface is not
possible. If possible place a small drop of water on the surface
and then place the probe tip into the water drop. Quick and
accurate results can be obtained in this manner.
Gage displayed an image of a triangle containing and
exclamation point ( ! ) and powered down
This image appears if the memory of the Gage has become
corrupt. This can occur if the Gage batteries were removed while