AquaLab 4TE Series User Manual

8 SAMPLE PREPARATION AquaLab
lizes. When the temperature stabilizes within an optimal one or two
degrees of the chamber temperature, you can proceed with normal
measurements.
High-water activity samples that are warmer than the chamber tem-
perature can cause condensation inside the measuring chamber, which
will adversely affect subsequent readings. A warning message ap-
pears (Sample too hot) if the sample temperature is more than 4
◦
C
above chamber temperature. If this message appears, immediately
remove the sample from the instrument, place a lid on the cup, and
allow the sample to cool to within 4
◦
C of the instrument before
measuring.
Samples that are lower than 4
◦
C of the instrument temperature
will cause long read times. The sample temperature must be within
one or two degrees of the chamber temperature before you can take
fast and accurate readings.
Note: The device fan can blow powdery substances, so be sure not
to overfill the sample cup and verify the cleanliness of the sample
chamber before reading a new sample.
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AquaLab 4TE Series Specifications

General

Accuracy	±0.003 aw
Temperature Control	15 to 50 °C
Measurement Time	5 minutes
Measurement Principle	Chilled Mirror Dewpoint
Resolution	0.0001 aw
Temperature Accuracy	±0.1 °C
Communication	USB, RS-232
Display	LCD
Measurement Range	0.03 to 1.00 aw
Operating Temperature	4-50 °C (39-122 °F)
Data Storage	8000 readings
Power Supply	50/60 Hz
Storage Temperature	-20 to 50 °C