Chapter 5 _________________________________________________________ Theory of Operation
VAISALA _______________________________________________________________________ 113
Rperi4:main receiver saturated
failure
Measurement Unit receiver saturated due
to reflections of an obstacle or wrong
Measurement Unit orientation
Rperi8:main receiver signal offset
drift failure
Measurement Unit: receiver, CPU or
internal cable failure
RwinCon1:backscatter high
Backscatter signal level increased due to
some disturbance in the light path
(Measurement Unit receiver).
Clean windows immediately.
RwinCon2:backscatter
measurement failure
Backscatter measurement failure
(Measurement Unit receiver)
RwinCon4:total reflection
measurement failure
Total reflection measurement failure
(Measurement Unit receiver)
Txer1: Transmitter failure
Summarization of Measurement Unit
Transmitter failure
Txer2: Transmitter failure
Txer4: Transmitter failure
Summarization of Measurement Unit
Receiver failure
Table 17 Interface Unit Event Messages
Conf0:VIS measurement only
The interface unit is configured to handle a
measurement unit sensor but no
background luminance sensor.
Conf1:ALS measurement only
The interface unit is configured to handle a
background luminance sensor but no
Conf2:VIS+ALS measurement
The interface unit is configured to handle a
measurement unit and a background
Conf8:configuration failure
The interface unit is configured to handle
neither a measurement unit nor a
background luminance sensor.
InCo1:VIS sensor not responding
Measurement unit is not responding.
InCo2:ALS sensor not
responding
Background luminance sensor is not
responding.
No mains input voltage available, working
on battery.
No mains input voltage available, working
on battery.
Battery voltage is low, system will shut
CPU1:+12V output disconnected
A short circuit has been detected at the
+12 V output. The output has been shut
down.
Check connected device for short circuit.
To bring the +12 V output back into
operation, the interface unit needs a reset.
Interface unit CPU detected a memory
failure.
If the failure persists after power-resets of