8. Troubleshooting
8.1 Problem Situations
If you experience problems when using the transmitter, check the following table before
contacting Vaisala. If the problem you have is not listed in the table, or if the proposed solution
does not fix the problem, contact a Vaisala Service Center. For contact information, see
.
Problem
Likely Cause
Possible Solution
Analog output reading
is unchanging and
appears incorrect.
Analog output is in
error state.
Remove the cause of the error state and the
analog output will recover its normal function.
Probe outputs stars
"****" on serial line
instead of
measurement data.
Humidity sensor is wet. Wait for the humidity sensor to dry, or remove
the filter and gently dry the sensors and the
filter with clean instrument air.
Sensor damage.
Remove the filter and visually check the sensors
for damage. Contact a Vaisala Service Center if
repair is needed.
Note that you can also replace the humidity
sensor yourself. Refer to instructions in
Replacing HUMICAP Sensor on HMD110/112 and
HMW110/112 (page 65)
and
Sensor on HMS110/112 (page 67)
.
Unsuitable operating
environment.
Verify that the operating environment is within
specified operating limits.
Cannot connect to
transmitter using
service port.
You are not using the
right connection cable.
Check that you are using the specified cables:
• MI70 connection cable (219980SP)
• Vaisala USB cable for computer connection
(219690)
Transmitter is
connected to RDP100
remote display panel.
Unplug the screw terminals as instructed in
Connecting to Service Port (page 31)
.
Chapter 8 – Troubleshooting
69
Содержание hmdw110 series
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