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Absolute humidity:
shows the contained amount of water in gramme per cubic metre of air. The
absolute humidity is a direct degree for the amount of water vapour
contained in a certain air volume. It shows how much moisture can
maximally condense or how much water has to be evaporated to receive a
certain desired air humidity.
Relative air humidity:
indicates the relation between the current water vapour pressure and the
maximal possible water vapour pressure (called saturation vapour pressure).
The relative humidity shows the degree the air is saturated with water
vapour. For example:
50% relative humidity indicates that at the current temperature and the
current pressure the air is saturated with water vapour for half of its value,
100 % relative humidity means that the air is totally saturated. When the air
has more than 100 % of relative humidity, the excessive moisture would
condense or form fog.
Operating the instrument
Switching on:
Press
for three seconds.
Changing the calibration curve:
or .
Menu:
Switch on the instrument pressing the key and immediately, during
showing the start logo, press both arrow keys
and
and keep them
pressed until the main menu appears.
Setting date and time:
Menu -
Options
–
date / time
Set date and time using the button
, according to the format indicated
(JJ.MM.TT). After entering the year, press the button
for entering the
month and again for entering the day. For changing from date to time also
press the button . After finishing, press
for saving the entered data.
risk level
% relative humidity
no
< 65
little
65% - 72%
Luftfeuchte
increased
72% - 80%
high
80% - 90%
very high
> 90%