We recommend carrying out regular periodical controlling check measurements, as different local circumstances
might need different material adjustments. (recommendation: controlling measurements by oven
Screed Moisture Measuring:
For accurate determination of moisture in different kind of screed we reccomend the instrument G812 together
with the test module PE05. On intrest, please contact:
DNS-Denzel Natursteinschutz GmbH
•
Am Wasserturm 5
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73104 Börtlingen; Germany Tel: +49 (0) 7161 959
336
•
Fax: +49 (0) 7161 959 337
•
•
www.dns-denzel.de The DM4A can be used for
measuring moisture differences
1.
1.
the measurements are non damaging
2.
2.
the measurements are very quickly done
3.
3.
if the measured values are too high time sensitive exact measurements e.g. the oven drying
method, are superfluous.
Even in one room great differences of the moisture in the fooring are possible. Therefore non damaging
measurements are necessary to find out the critical places for an exact time sensitive measurement as e.g. the
oven drying method.
The number of such damaging measurements are then minimised.
The result of our capacitive moisture meter depends on differences in density, mixtures and surface roughness. It
depends also from the moisture profile. The influence to the moisture gets smaller for higher depth. The measuring
result is an average moisture value.
With our moisture meter it’s possible to observe the drying process. If at the same place after several days the
moisture result does not change, the moisture is in balance with the air humidity. In this case also at high
moisture readings an exact comparing measurement e.g. with the oven drying method is recommended.
Oven Drying Method:
The oven drying method is the most acurate way to measure the material moisture in
wood (ISO 3130-1975), building materials and paper (DIN ISO 287).
We recommend this for testing and calibrating of all electronic moisture meters.
Short description:
1.
1.
For measuring the weights we recommend a balance with an measuring range of 200g and an
accuracy of 0,01g
2.
2.
For drying you need an oven with adjustable temperatures of 40, 100 and 104°C
3.
3.
Take a probe from wood with a sharp saw, avoid edge parts. For building materials take a probe
with a with a sharp chisel to a depth of approx 3cm. the probe should be at least 20g
4.
4.
It is very important to take the weight of the first probe immediately, as air humidity may change
the moisture content. Name of the first weight: wet weight (WW)
5.
5.
The probe must be dryed in the oven until the weight is constant. The maximum drying
temperatures: for wood: 104 °C (ISO 3130-1975) for paper 100°C (DIN ISO 287) for e.g. concrete flooring:100 °C
for anhydride flooring: 40°C
6.
7.
The name of the dry weight is DW.
7.
8. The moisture content is calculated with the formulas:
Summary of Contents for DM 4 A
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