Delmhorst Instrument TechCheck - Manual (Page 10)

Copyright  2008, Delmhorst Instrument Co.
Page 10 of 15
If the meter still indicates a “dry” condition, the floor is ready for covering. Tests should
be made at several points, especially when the slab is thick (4” or more) and air
circulation is poor. Make tests only in newly drilled holes.
When evaluating a slab for readiness, always consider its age, thickness, whether the
slab is on grade or suspended, whether a vapor barrier is present and the drainage
condition of the ground.
TESTING INSULATION:
To take a reading, attach a 21-E electrode with 4” insulated contact pins to the meter. Push the
contact pins through the Sheetrock® into the insulation behind it. Remember that when used on
materials other than wood, the meter’s PIN mode will give relative readings only. Establish a
baseline reading by taking a reading in an area you know to be unaffected, then take a reading in
the affected area and compare the two readings.
TESTING DRYWALL
To take a reading, firmly press the back of the meter onto the material to be tested while in
SCAN mode. This will display a relative reading that ranges between 0 and 300. Remember to
establish a baseline reading by taking a reading in an area you know to be unaffected, then take
a reading in the affected area and compare the two readings.