Vaisala HMDW80 - Manual (Page 44)

User's Guide _______________________________________________________________________
42 ___________________________________________________________________ M211510EN-C
Analog Output Error State
HMDW80 series transmitters set the output channel(s) into a defined
error level instead of the measured result in two situations:
- Transmitter detects a measurement malfunction. This means an actual
measurement problem, such as sensor damage or unsuitable
environmental conditions.
- Measured value(s) are well outside the scaled output range. For a
more detailed explanation, see section Analog Output Overrange
Behavior on page 16.
The error level depends on the output type:
- For 0 ... 10 V output, the error level is 11 V.
HMW83 and TMW83 are an exception to this, their error level is 0 V.
- For 4 ... 20 mA output, the error level is 3.6 mA.
The transmitter resumes normal operation of the analog output(s) when
the cause of the error state is removed.
Error Messages on the Display
Table 8 Error Messages on the Display
Error Message Possible Cause and Solution
INTERNAL 1
INTERNAL 2
INTERNAL 3
Internal problem with the transmitter. Restart the
transmitter to see if the problem remains. Contact Vaisala
technical support if unable to remove the problem.
ERROR HUM Humidity measurement failed. Check if the humidity
sensor is damaged or missing.
ERROR T Temperature measurement failed. Check if the
temperature sensor is damaged or missing.