Mode (hygrolab 3), In-e-hylab-v4_11 – ROTRONIC HygroLab User Manual
Page 18
IN-E-HyLab-V4_11
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
Instruction Manual
Document Type
HygroLab bench top indicator version 4:
instruction manual
Document title
Page 18 of 51
© 2006; Rotronic AG IN-E-HyLab-V4_11
6.2 MODE (HygroLab 3)
Definition
This function is used to set the operating mode of the HygroLab 3
Selections
Standard
: normal operating mode (relative humidity, temperature, dew point, etc.)
Q AwQuick
: water activity measurement with the AwQuick algorithm for measurements in
typically 5 minutes.
E AwE
: conventional water activity measurement with automatic detection of equilibrium
conditions.
Note:
The operating mode selection applies to all probe inputs. Upon start up, the HygroLab 3
remembers in which mode it was before being turned off
● Standard Mode:
This mode is the default mode of the HygroLab 3. Upon powering the HygroLab 3, the instrument
automatically defaults to the standard mode.
In the standard mode, the HygroLab 3 displays the humidity and temperature measured by the
selected probe. Trend indicators appear one minute after powering up the instrument (▲ or ▼
arrow to the left of the water activity and temperature values). These indicators are used to detect
equilibrium conditions as required for example during probe calibration. The probe is at equilibrium
when both the up and down arrow are displayed at the same time.
● AwE mode:
This mode is essentially the same as the standard mode with the difference that the HygroLab 3
automatically detects equilibrium conditions and ends the measurement at that time by freezing the
display.
● AwQuick mode:
This mode accelerates the measurement of water activity and provides a result in typically 5
minutes. When temperature conditions are stable (both at the product and probe), the
measurement obtained with the AwQuick mode is generally within ± 0.005 aw of the measurement
that would be obtained by waiting for full equilibration of the product and probe.
Depending on the mode that was selected, proceed as follows