DewPro MMR101 User’s Manual
23
Chapter 4. Troubleshooting
Chapter 4. Troubleshooting
Table 9:
Failure
Possible Cause
Remedy
Current
signal
outside 4 to
20 mA range
The sensor circuit has
measured a value which
lies outside the
calibration table range.
This may be caused by
very dry process
conditions (current < 4
mA) or by condensation
effects on the sensor
(current > 20 mA).
Check the display diagram
on instruments equipped
with the optional display
module.
If
the signal arrows on either
side are lit or error code 201
or 202 is displayed in pos. V9
H0, this means that the
measuring range has been
exceeded. Remove the
sensor from the process and
expose it to ambient air or
another air source with a
relative humidity between 10
and 90%.
Contact GE Sensing if the
measured value does not
return to the 10 to 90% range.
The dew point or another
operand is outside the
permissible range.
All operands are limited by
specific output ranges. The
signal arrows on the display
module only light up when
the relative humidity lies
outside the calibration
range. The computed
quantity, e.g. for the dew
point, may be outside the
operating range for several
combinations of
temperature and relative
humidity
Operation outside these
ranges does not damage
the instrument.
