Decagon Devices AquaLab 4TE Operator's Manual page 28

AquaLab
5. Menus
Mode:
Users may choose between single, continuous, or custom mode by
pushing the save button.
Single Mode
Single mode reads the sample once, after which the instrument noti-
fi es you that it is fi nished and the water activity and temperature are
displayed on the screen.
Continuous Mode
Continuous mode reads your sample until you open the chamber
lid or stop the test using the stop button. AquaLab reads the sample,
displays the water activity and temperature, then begins another read
cycle without further input from the user. Between samples, the ma-
chine will signal you with beeps. Th is mode eliminates the possibility
of moisture exchange with the environment outside the chamber in
between readings. A time on the bottom left of the screen tracks the
cumulative read time. All readings taken during continuous mode
are saved on the instrument's memory if the autosave feature is se-
lected (see Auto Save below). If AquaLab is connected to a computer
using AquaLink RG (See Chapter 11), all readings taken during con-
tinuous mode will be downloaded to the AquaLink RG software.
Custom Mode
Custom mode allows a sample to be read multiple times until a de-
sired level of stability is achieved. Th e user determines how many
consecutive tests they want to be within a given water activity sta-
bility setting. For instance, the customer can choose to have 4 con-
secutive tests be within +/- 0.001a . Th e instrument will continue
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to run tests until it records 4 consecutive tests that are within +/-
0.001a and then will stop and report the value of the fi nal test. If
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autosave is turned on, all test readings will be saved to the instru-
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