Vaisala HMT360 - Manual (Page 75)

Chapter 8 ___________________________________________________________ Troubleshooting
VAISALA_______________________________________________________________________ 73
CHAPTER 8
TROUBLESHOOTING
This chapter describes common problems, their probable causes and
remedies, and contact information.
Diagnostics
Operation Errors
The following symptoms indicate an operation error of the HMT360:
- The analog output(s) current drops below 4 mA.
- Transmitters with display: Display shows an error code; see Table 7
on page 74 .
- Transmitters without display: The LED on the cover is lit when no
calibration is going on.
- Serial command ERRS reports an error; see Table 7 on page 74 .
- Serial port outputs asterisks "*" instead of measurement readings.
In the case of error:
- Check that the probe is undamaged.
- Check that the probe module is connected properly. If it is not,
reconnect the probe module and reset the transmitter.
- Check that the humidity and temperature sensors are undamaged and
dry. If there is condensed water on the sensors, let it dry.
In case of constant error, contact the Vaisala Helpdesk. See section
Technical Support on page 74 for contact information.