Decagon Devices AquaLab 4TE Operator's Manual page 60

AquaLab
9. Taking a Reading
chamber if they have a high water activity. It is best to remove the
sample from the instrument, place a lid on the cup and allow the
sample to cool before reading.
• The physical temperature of the instrument should be between
15 - 50°C. Between these ambient temperatures, AquaLab will
measure samples of similar temperature quickly and accurately.
The AquaLab Series 4TE and 4TEV have temperature control
capabilities that enable them to read samples at temperatures
different from ambient temperature, but no higher than 50°C.
• If a sample has a water activity lower than about 0.03, AquaLab
will display the < symbol (see below) notifying you that your
sample is too dry to be accurately measured by the AquaLab.
• If you know that your sample's water activity is above what the
screen is telling you, your instrument's sensors may have been
contaminated and will need to be cleaned (see Chapter 6) or
serviced (see Chapter 13).
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