7
AQUALAB TDL/TDL 2
Perform the following steps to take a reading.
1. Ensure the AQUALAB TDL is plugged in and turned on.
The splash screen will appear, followed by the main Measurement tab (
).
2. Open the sample chamber by moving the lever to the OPEN position.
3. Verify cleanliness (
), and sample preparation
4. Check the top lip and outside surfaces of the sample cup to ensure they are free from
sample residue and confirm the sample cup is not overfilled.
NOTE: Overfilling the sample cup may contaminate the chamber sensors.
The sample cup lid must be removed for correct functionality.
5. Place the prepared sample cup in the chamber.
6. Close the chamber lid.
7. Move the lever to the READ position to seal the chamber. The reading will automatically
start.
In 1 to 2 min, the first measurement will display on the screen (this is an intermediate
reading). Length of read times may vary depending on temperature differences between
the chamber and the sample as well as on other properties of the sample (
).
The default AQUALAB TDL reading cycle continues until the rates of change of three
consecutive intermediate readings are <0.0005
a
w
of each other.
When the instrument has finished its read cycle, results will display, including water
activity and read time. The
SAVE icon replaces the spinning measurement icon, and, if
enabled, a series of beeps sounds (
).
NOTE: Autosave only saves the moisture content value of the model selected at the end of the reading. Overwrite
the autosave by selecting the correct model using the UP and DOWN buttons and selecting SAVE.
Figure 3 Completed test results with both water activity and moisture content
8. Autosave (default setting) retains the data without any annotation (
).
To add an annotation, select
SAVE, add desired letters, and select SAVE again (
).
