Solving typical problems - HMP110 - HMP113 - HMP60 - HMP63

HMP60 and HMP110 Series User Guide

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User guide

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. For contact information, see Technical support.

Table 1. 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.

Any check sum error is active. For example:

  • Program flash check sum error
  • Parameter flash check sum error
Internal error. Perform the following steps:
  1. Return the probe to factory settings using the FRESTORE command. Check again.
  2. If the error is still active, contact Vaisala.
The following error is active: Frequency measurement outside the permissible value range

Check for condensation on the probe and sensor. Allow the probe and sensor to dry.

If the error is still active, there may be a problem with the electronics. Contact Vaisala.