CAISSON VI-D4 Bedienungsanleitung Seite 7

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. ~ Carbide Method 0-4% H
Carbide scale shows concrete humidity according to the carbide method.
3.
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. ~ Caisson Scale
Caisson scale works in a similar way as the Relative scale and can be used alongside meters with the
same scale, which ranges between 0.3 and 15.3.
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.
Auto turn-off.
In order to maximize batteries lifetime, the meter automatically turns off after 12 minutes. This
function is always active and can't be switched off.
0-6% H O
2
O
2
0-100%
m
0.3-15.3