17
Tips and assistance
Questions and answers
Question Possible causes/solutions
Hi or Lo · Readings outside the measuring range (too high, too
low): Keep to the permitted measuring range.
· Residual capacity <10 min: Change batteries.
Testing the instrument
function: Test: ok does
not light up · Clean sensing electrodes and contacts on the top
of the protection cap.
· If the error message appears again, send the
instrument to Testo Customer Service.
Meas. electrodes defective/
worn · Send instrument to Testo customer service.
Typical values for equilibrium moisture (Air dryness in building
materials
1
):
Material Char. curve Material moisture
Anhydrite screed 4 <0.5 % by weight
Concrete 3 <2.2 % by weight
Plaster 3 <0.8 % by weight
Lime mortar 6 <2.0 % by weight
Brick, fireded
without hole 7 <1.0 % by weight
Cement screed 3 <3.0 % by weight
Cement mortar 5 <3.0 % by weight
1
In ambient conditions of 20 °C and 65 % RH
Guideline values for the installation moisture of wood, which sets
in as an average after a certain period in use-status (DIN 1052-1
(4/88) Para. 4.2.1.):
Char. curve Application area Wood humidity in % by weight
1 or 2 buildings closed on all sides with heating 9 ± 3
1 or 2 buildings closed on all sides without heating 12 ± 3
1 or 2 roofed open buildings 15 ± 3
1 or 2 constructions which are open to the weather on all sides 18 ± 6
If we could not answer your question, please contact your dealer
or Testo Customer Service.
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Tips and assistance
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