Delmhorst Instrument BD-10 - Manual (Page 11)

hApply the other pin to various parts of the wall where you suspect
the leak originates. If the meter indicates red or “wet”, the material
is wet between the points of contact. If the meter reads green or
“dry”, the material along this line is not in the path of a leak.
To confirm if a brick wall is waterproof:
Perform the following procedure after storms to verify if a brick wall
is waterproof, or if waterproofing repairs have been properly performed:
hDrive pairs of nails into the brick wherever it is necessary to
make the tests and leave them in place until after all the tests are
completed.
hTake readings after each storm, and record the readings. The
pattern of these readings will indicate if the brick is gradually
drying out or is moistened again by each storm.
Detecting Moisture in Insulation:
Use the BD-10 with the #21-E Electrode and #608 insulated
pins to detect moisture in insulation. These pins are insulated,
except at the tips. Only the uninsulated tips make contact
with the material, providing information as to the depth at
which moisture is present.
Procedure:
hDrill two 3/16” diameter holes, one inch apart through
the siding.
hUsing the #21-E, insert the #608 contact pins into
the holes so that you make contact with the insulation.
hPress the read button
!
and read the reference scale
$
.
Take readings at various depths of penetration to determine
the location of moisture.
hFill holes with putty at the conclusion of the test.
Meters are not calibrated to read the percentage of moisture
content in the insulation. Instead, meter readings provide
a qualitative indication of the presence of moisture. The
meter may also help identify the pattern of distribution to
help you determine if moisture is due to condensation or
leakage.
The presence of moisture in insulating material greatly
reduces its insulating properties. If the insulating material
absorbs moisture, water will displace the air in the material.
Water also transmits heat at a faster rate than air, thus
reducing the efficiency of the insulation.
10