User`s guide

User’s Guide ______________________________________________________________________
196 __________________________________________________________________M210662EN-A
Air Temperature and Relative Humidity Sensor
Present Weather Detector
If the Present Weather Detector is not working properly:
1. The lenses may be excessively contaminated.
- Clean the lenses.
2. One of the hoods has been filled with snow, leaves or other things.
- Clean the hoods.
3. Check that there are no foreign objects in the sample volume.
- Tree branches, loose cables, or any other moving objects in
the sample volume may cause sudden changes in the scatter
signal.
4. Check the power supply voltage.
5. Check that all the connectors are properly inserted.
6. Check the power cable and connections.
7. Check that there are no flashing lights close to sensor.
- Flashing lights may cause sensor to detect peaks in the optical
signal.
For more information, refer to Present Weather Detector User's Guide.
Table 38 Troubleshooting the Air Temperature and Relative
Humidity Sensor
Problem Probable Cause Remedy
You receive no data. Cable is not connected. Check the cable connection.
The data seems to be
incorrect.
The installation site is not correct. Select a new location according to
the installation instructions.
The probe requires calibration. Calibrate the probe according to the
separate instructions.