5. Preparation for use of Resitest-400M
a. How to insert the sponge into the Wenner sensor.
The sponge of the Wenner sensor should always be kept clean
condition
to
get
accurate
results.
Before
and
after
every
measurement, the sponge need to be cleaned, using Bath Tub
(water container), which is supplied with the instrument during
measurement.
Soak the sponges in water and insert them to the rings. After use,
take out the sponges to wash in tap water or clean water.
From time to time you should wash them, using bath tub.
b. How to connect the Wenner sensor to the main body.
After connecting the cable to the sensor, connect the cable to
the socket in the main body. If the main body is turned before
connecting the cable to the main body, the main body may be
damaged during connecting the cable so that it is advisable to turn
the instrument after connecting cables.
c. Concrete Surface
If the concrete surface is dry or wet, this can cause significant error.
Also when the concrete surface is stained, it can not be measured
and may cause significant error. If possible, therefore, it is advisable
to keep the concrete surface as the best condition. In case of the
concrete surface coated with oil paint, it is impossible to measure
the electrical resistivity. Likewise in the event of the concrete
surface coated with water paint, measurement may be incorrect.
Should be drilled 2 - 3 mm hole into the concrete in order to get
the best results.
Resitest 400M-June-2011-mkc-8/28
