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2.2.1 Using Auxiliary Moisture Probes in Measure Mode
To take sub-surface readings in masonry,
the Deep Wall Probes should be used
instead of the standard Moisture Probe.
To use the deep wall probes, drill two
1/4" (6 mm) diameter clearance holes,
spaced 2-3 in. (50-75 mm) apart, to the
required depth (see figure at right). Push
the two Deep Wall Probes into the holes
and press and hold the tips firmly
against the bottom of the holes. Ensure
that the probes are connected to socket
JC and measure the %WME value as
described in section 2.2.
Note: The most convenient way to take sub-surface readings in wood is by
using an optional Hammer Electrode.
2.2.2 Detecting Hygroscopic Salts
The Protimeter MMS instrument can be used as a basic salts detector when
used with the Moisture Probe, filter papers and distilled water (not included).
Moisten the filter paper with the water and take a reference reading across it
with the Moisture Probe. Then place the moistened filter paper against the
surface of interest and hold in place for 30 seconds. Remove the paper and
place the pins of the Moisture Probe across the paper again and observe the
reading. Compare this reading with the original reference reading. If the
difference is more than 20 points, there is significant salts contamination that
may warrant further investigation.
2.3 Hygrometer Mode - Selection and Use
To use the Protimeter MMS as a hygrometer, connect the Hygrostick or
Humistick probe into socket EC1 either directly or indirectly with the
extension lead. Turn the MMS ON by pressing
. Then, select the
repeatedly until the word HYGROMETER is
hygrometer mode by pressing
visible in the top left corner of the LCD. Then press
to select relative
humidity (%rh), ambient temperature (T
), dew point temperature (T
), or
AIR
DEW
specific humidity (g.Lb or AbS) as required. Temperature values can be
displayed in °C or °F (see section 2.5 for instructions).
Page 8
Protimeter MMS Moisture Measurement System
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