Delmhorst Instrument TechCheck PLUS - Manual (Page 11)

Copyright  2009, Delmhorst Instrument Co.
Page 11 of 33
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 Drywall 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
USING PIN MODE
To take a reading, set the meter scale for drywall and push the contact pins into their full
penetration, if possible.
Press the SELECT button and read the moisture content on the meter scale. The meter
displays the %MC for two seconds.
USING SCAN MODE
You can also take a reference reading on drywall using the meter’s SCAN mode. 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.