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Protimeter MMS Moisture Measurement System
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
hygrometer mode
by pressing
XX
repeatedly until the word
HYGROMETER
is
visible in the top left corner of the LCD. Then press
X
to select
relative
humidity
(%rh),
ambient temperature
(T
AIR
),
dew point temperature
(T
DEW
), or
specific humidity
(g.Lb or AbS) as required. Temperature values can be
displayed in °C or °F (see section 2.5 for instructions).
