Chapter 8. Maintenance and Troubleshooting
160
Model PM880 Portable Hygrometer User’s Manual
8.13Replacing and Recalibrating the Moisture Probes
Note:
Remove the probe cable by pulling back the spring-loaded sleeve and
pulling the cable out of the connector.
For maximum accuracy you should send moisture probes back to the
factory for recalibration every six months to one year, depending on the
application. Under severe conditions you should send the probes back for
recalibration more frequently; in milder applications you do not need to
recalibrate probes as often. Contact a GE applications engineer for the
recommended calibration frequency for your application.
Note:
You can program the PM880 to remind you when it is time to send the
probes back for recalibration. Refer to
Setting a Probe Calibration
Reminder on
When you receive new or recalibrated probes, be sure to follow the
instructions in Chapter 1,
Getting Started
, to install, connect and enter
calibration data for the probe(s). Note that each probe has its own
Calibration Data Sheet with the corresponding probe serial number printed
on it.
You do not have to enter calibration data for the MISP2 Probe or for the
Moisture Image Series (MIS) Probe if you returned both the sensor and the
electronics module to the factory for recalibration. However, you should
verify that the calibration data entered at the factory is correct (see
Entering
Setup Data
on page 7). If you sent only the sensor part of the MIS Probe to
the factory without the module, you must enter the calibration data
manually.
