ROTRONIC HygroLab - Manual (Page 25)

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 25 of 51
© 2006; Rotronic AG IN-E-HyLab-V4_11
6.7 PROBE
Definition
This function displays the version number and serial number of any ROTRONIC HygroClip digital
probe connected to the instrument.
Procedure
Prior to entering the function, select the probe to be displayed (this is the same as the probe that
was last displayed).
When entering the function, the version number of the probe is displayed first. Use the ▼ or ▲ key
to display the serial number of the probe.
6.8 SETTINGS
Definition
This function is used to do the following:
• Turn the trend indicators on or off
• change the symbol used for relative humidity or display humidity as Water Activity (aw)
• adjust the fixed value of barometric pressure used in some psychrometric computations
(except HygroLab 1)
• select between the Metric or English unit system
Procedure
Trend: use the ▼ or ▲ key to enable or disable the trend indicators.
The trend of humidity and temperature is shown on the display by an arrow (up or down) to the left
of the measured value. Both arrows are shown to indicate stable conditions. Stable conditions are
defined as rate of change of less than 0.02 %RH / min or
°C / min.
Signal stability is first evaluated after 60 seconds into the measurement and is updated every 30
seconds.
Note: when the trend indicator is enabled, the symbol for the calculated parameter (e.g. Dp for dew
point) is no longer displayed to the left of the numerical value.
Humi Unit: use the ▼ or ▲ key to change the symbol used for relative humidity (depends on
country and language) or to display humidity as water activity.
Press. Const. (except HygroLab 1) : use the DOWN arrow key to select the digit to be changed.
Use the UP arrow key to change the value of the digit.
Units: use the ▼ or ▲ arrow key to toggle between Metric and English.