User's Guide _______________________________________________________________________
132 ______________________________________________________________________________
Changing the Sensor
The user can change the HUMICAP180, HUMICAP180L2, and
HUMICAP180R sensors. If the transmitter has the chemical purge
and/or warmed probe option (which utilize the HUMICAP180C or
HUMICAP180RC sensor), the sensor cannot be changed by the user.
Changing the sensor should be considered corrective maintenance,
and it is not necessary in normal operation. If the accuracy of the
transmitter does not seem to be within specification, it is more likely
that the transmitter is in need of calibration and adjustment, and not
sensor replacement. Refer to chapter Calibration and Adjustment on
page 137.
NOTE
When replacing the sensor, the new sensor must be of the same type
as the old sensor (for example, HUMICAP180R). The sensor type
can only be changed at a JUMO Service Center.
1.
Remove the filter from the probe. See the instructions in section
Changing the Probe Filter on page 131.
2.
Remove the damaged sensor and insert a new one. Handle the
new sensor by the plastic socket. DO NOT TOUCH THE
SENSOR PLATE.
3.
Perform a calibration and adjustment as instructed in section
Relative Humidity Adjustment after Sensor Change
on page
4.
Attach a new filter on the probe. When using the stainless steel
filter, take care to tighten the filter properly (recommended force
5 Nm).
0508-079
Figure 66
Changing the Sensor
The following numbers refer to Figure 66 oben:
1
=
Pull out the sensor
2
=
Plastic socket
