Voltage Supply; Humidity Measurement Procedure - testo 616 Bedienungsanleitung

22 3. Product description

3.2 Voltage supply

Voltage is supplied by means of a 9 V monobloc battery
(included in delivery) or rechargeable battery. It is not
possible to run the instrument from the mains supply or
charge a rechargeable battery in the instrument.
3.3 Humidity measurement
procedure
The non-destructive stray field measurement uses the
ability of water molecules to dampen and thus change
electromagnetic fields. The electric field penetrates the
material via the contact plates and creates a measuring
field with a depth of approx. 5 cm (2").
The following factors can influence the measurement result:
Factors
Measurement depth
Material surface
Material properties
Moisture distribution
Metals and electric fields
Ideal condition
Material thickness > 5 cm (> 2
layers of the material influence the measurement result
more than the deeper layers.
As level as possible as contact plates should lay flat
against it.
As homogeneous as possible with no air pockets.
As even as possible.
None, if possible.
"
). Caution: The upper