GANN HYDROMETTE HB 30, Operating Instructions Manual

Page: 39 / 65

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Instructions For Non-Destructive Measurement of Structural Moisture
Using the Active Electrodes MB 35, B 50 and B 60
Set selector switch (4) to position »M«.
Connect electrode to meter socket (2) and apply it as described hereinafter.
Press measuring key (5) and read result displayed by LCD readout (3).
Active Electrode MB 35
The active electrode MB 35 has specially been developed for surface moisture measurement
on concrete and sub-floorings and are suitable particularly for moisture checks prior to coating
or gluing.
The measuring range extends from 2.0 to 8.0 % of dry weight (according to oven test). The
reading is displayed direct in per cent of moisture.
The electrode is fitted, as standard equipment, with the surface measuring caps M 20-OF 15
with elastic contact pads of conductive plastic material. The pads are glued on their support
which in turn are screwed on the electrode handle. Make sure that the measuring caps are
properly screwed down. Exchange the elastic measuring pads in case of wear or damage. Fix
the new pads on the support plate by means of a commercially available instant adhesive on
cyanate basis.
Use of active electrode MB 35
Connect electrode to the meter and press the measuring pads firmly on the concrete. Press
measuring key and read off result in per cent of dry weight. The surface of the concrete
should be cleaned from dust and separating agents or other contaminations to ensure correct
measuring results. Measurements should be taken only after lapse of about 48 hours, if de-
humidifiers or hot air blowers have been used to speed up the drying process.