Decagon Devices AquaLab 4TE Operator's Manual page 88

AquaLab
12. Troubleshooting
Diagnostic Screen
If, after cleaning your instrument and reading the other trouble-
shooting hints, you have reason to believe that one of the compo-
nents of your AquaLab may be causing measurement error, you
may access a screen that will display values for component perfor-
mance. Th is is done by navigating to the Confi guration tab and
then by scrolling down to the diagnostics option. Press enter and
you will be given a list of components and their values.
Th is screen shows typical values for the dew point method. Lid,
base and sample temperatures may fl uctuate but should not change
more than 0.03 degrees. Typical ranges for the lid, base and sample
temperatures is between 24.5 and 25.5 degrees.
If the mirror temperature is at lid temperature, the cooler has failed
and must be replaced. If the mirror is below the lid temperature or
appears to be random, the thermocouple wire is broken and must
be repaired.
A typical optical range is between 500 mV and 2900 mV .
For capacitance mode, not shown here, the RH percentage should
always be between 0 and 100%.
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