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3.
Preparation of the surface before measuring:
All concrete heating/drying equipment should be switched off at least 96 hours before taking the final
measurements. Otherwise the outcome may not reflect the actual humidity level or displacement of humidity
in tested material.
Before the measurement may be taken, the analyzed surface should be cleaned- there should not be any
foreign substances like plastic films, dust etc. In case of measuring concrete floors all covering materials like:
concrete additives, primers, paints, etc., should be removed in order to reveal pure concrete that is going to
be measured. All cleaning and cover-removing works should be finished at least 48 hours before taking the
measurement. VI-D4 meter should not be used to measure concrete on which there is water in a liquid state.
Measurements should be avoided in areas exposed to direct sunlight or other sources of heat.
Available scales:
1 Concrete
Concrete scale may be used only for concrete surfaces. It shows the relation between weight of pure
water contained in the tested material with its dry weight. The scale range varies between 0 and 6% as
6% is about maximal physically possible content of water in the concrete. The obtained results should not be
confused with moisture emission or any other humidity measurement methods.
2. Cement Screed
This scale is used to measure the moisture content of cement screed. The content of water is expressed as
a percentage of weight.
3. CM Cement
This scale is used to measure the moisture content of cement screed. The displayed value is an approximate
value that can be also determined using the Carbide Method (CM).
4. Anhydrite Screed
This scale is meant for moisture measurements in anhydrite floors. The displayed value is an approximation
of a value that normally would be indicated using a CM-measurement device.
5. Anhydrite Screed
This scale is used to measure the moisture content of Ascreed. The displayed value is an approximate value
that can be also determined using the Carbide Method (CM).
6. 15.3 Scale
Scale works in a similar way as the Relative with a range from 0.3 til 15.3m
7. Relative Scale
Relative scale may be used in humidity level comparison of various materials. Obtained results should not be
interpreted as percentage content of water in tested surfaces. There is no linear correlation between the
outcomes and relative humidity. The scale should be used only as comparison technique. Scale may be
used on the surfaces where direct contact with pure concrete is impossible because of some layer/covering.
4.
Modes & Functions:
Normal Mode.
The main measuring method of VI-D4 meter is Normal mode. In this setting the measured value is
refreshed continuously.
Max. Hold mode.
If the measured area is not easily reachable and it is impossible to read the value while measuring,
the Max. Hold mode may be used. After choosing that mode the measured value is not refreshed
continuously. The meter will show only the highest value gained from numerous measurements.
!
Caution: Even single touching of sensor plate or electrodes during this mode will cause a highly
inaccurate outcome. That in turn will result in the need of repeating the whole measurement process.
The measurement in that set may be repeated by switching the mode into Normal and then into Max.
Hold again
WOLFF GmbH & Co. KG | D-74360 Ilsfeld | Ungerhalde 1 | Tel. +49 (0)7062-91556-0 | Fax +49 (0)7062-91556-10 | E-Mail
(0-6% H
O)
2
(0-6%H
O)
2
(0-4% CM)
(0-3.5% H
O)
2
(0-1.9% CM)
(0.3-15.3m)
(0-100%)
info@wolff-tools.com | Internet www.wolff-tools.de
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