Vaisala HMP110 - Manual (Page 63)

Chapter 6 ___________________________________________________________ Troubleshooting
VAISALA _______________________________________________________________________ 61
CHAPTER 6
TROUBLESHOOTING
This chapter describes common problems, their probable causes and
remedies, and contact information for technical support.
Solving Typical Problems
You can check the error message via the serial interface by using the
ERRS command. If you are unable to remove the errors, contact Vaisala
technical support. See section Technical Support on page 62.
Table 9 Troubleshooting Table
Problem or Message Likely Causes and Solutions
Measurement not working.
any of the following errors
active:
- T meas error
- RH meas error
- Sensor(s) damaged or missing. Open the filter
and check.
- Check the supply voltage of the probe.
- Check the output mode of the probe using serial
line.
Humidity measurement
appears to be wrong. - Check for condensation on the probe and
sensor.
- Use the L command to check the currently
applied calibration correction.
- Calibrate and adjust the probe (HMP110).
- Calibrate the probe and change the sensor if
necessary (HMP60).
The probe is not responding
to any serial commands. - Disconnect the USB cable from the probe and
retry. If your probe is in the analog output mode,
press ENTER a few times immediately after
connecting the USB cable.
- Try the ?? command in case the probe is in
POLL mode, open the line using OPEN
command if necessary.
- Check your serial line settings and cable
connections.
The following error is active:
- Voltage error
- Operating voltage out of range. Correct voltage
and reset probe.