d. Main body
The Resitest-400M consumes the battery quite much so that you
would better take the instruments with full charged.
Before going on site, turn on the instrument and check whether
the instrument is operated well. Check if the measurement is O.K
with reference block.
While
there
is
no
pre-defined
minimum
spacing
between
measurements on the surface of the concrete member, it is of little
value to take two measurements from virtually the same point,
Conversely,
measurements
taken
with
very
wide
spacing
may
neither detect corrosion activity that is present nor result in the
appropriate accumulation of data for evaluation. The spacing shall
therefore be consistent with the member being investigated and
the intended end use of the measurements. Generally, a spacing of
50 cm has been used on site. But in case of the place where the
probability of corrosion is high, smaller spacing is recommended.
When measuring at a certain place, it is better to keep the Wenner
sensor as far as possible from the reinforced bars.
Resitest 400M-June-2011-mkc-9/28
