Dew Point Sensor Failure - Decagon Devices AquaLab 4TE Operator's Manual

SOLUTIONS:
1) Th e sample is too dry for the instrument to read accurately.
If your sample has a water activity that is less than below the
detection limits of the instrument, this message will come up.
Essentially, it means that there is not enough sample mois-
ture to condense on the mirror and provide a reading.
2) Th e mirror may be dirty. Try cleaning the mirror and cham-
ber and measuring the sample again.
6. PROBLEM:
Message on screen displaying dew point sensor failure.
SOLUTION:
Th e Cooler is damaged and will need to be serviced by Decagon.
See Chapter 12 for detailed instructions.
12. Troubleshooting
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AquaLab