Kerbl FSK Mode D'emploi page 21

If the battery symbol appears in the measuring window resp. if a critical charge of
battery is shown in the status, the batteries have to be changed IMMEDIATELY.
Also remove the batteries if you do not use your device for a longer period. For
eventual resulting damages we
cannot provide any warranty.
Determination of the material reference moisture
The measuring device determines the water content that means the moisture is cal-
culated in relation to the total mass:
Mn - Mt
% F =
Mn
Mn: Mass with average moisture content
Mt : Mass of the dried sample
%F: Calculated moisture content (corresponding to norm EN ISO712)
x 100
20