Maintaining the product 17
Maintaining the product
Changing batteries:
1 To open the battery compartment, push the battery cover
down.
2 Remove used batteries and insert new batteries
(2x 1.5 V type AAA). Observe the polarity!
3 To close the battery compartment, push the battery cover
back on.
Cleaning the housing:
> Clean the housing with a moist cloth (soap suds) if it is dirty.
Do not use aggressive cleaning agents or solvents!
Questions and answers
Question Possible causes/solutions
Hi or Lo · Readings outside the measuring range (too high,
too low): Readings outside the measuring range
(too high, too low): for materials that have not been
specially dried or moistened, the measurement
results should always be within the 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.
The material‘s measured moisture content is relative to the dry
weight (0% moisture) of the relevant material. The stored material
characteristic curves were determined using the Darr (wet and dry
weighing) method. The specified measuring ranges are derived
from this.
Conversion to percent by weight
Percent by weight = (wet weight-dry weight) × 100 / dry weight
Example
Wet weight: 180 g
Dry weight: 150 g
Percent by weight: (180 - 150) × 100 / 150 = 20%
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