humimeter RH2 Operating Manual
Page 34
Relative humidity
Indicates the relationship between the current water vapour pressure and the maxi-
mum possible, the so-called saturation vapour pressure.
The relative humidity shows the degree the air is saturated with water vapour.
Examples:
50% relative humidity: At the current temperature and pressure, the air is half satura-
ted with water vapour. 100% relative humidity means that the air is totally saturated
with water vapour. If the air has more than 100% humidity, the excessive humidity
would condense or precipitate as mist.
EMC wood
Shows the wood equilibrium moisture content (for wood stored under these condi-
tions) in % wood moisture and the temperature in the selected unit (°C or °F).
EMC POM
Shows the POM granulate equilibrium moisture content (for granulate stored under
these conditions) in % moisture content and the temperature in the selected unit
(°C or °F).
Water activity
Water activity (Activity of water) is described as free, not cellularly bound water in
products such as food. It is defined as the quotient of the water vapour pressure of a
material to the water vapour pressure of pure water at a given temperature.
Free calibration curves
There are free calibration curves in the measuring device, which can be used for mea-
suring special products.
On request Schaller Messtechnik GmbH can develop customer-specific calibration cur-
ves for your special product.
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