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INTRODUCTION
Thank you for purchasing General Tools & Instruments' MP905
Deep Wall Moisture Probe for General's MMD900, MMD950 or
MMD950W Deep Sensing Moisture Meter. Please read this user's
manual carefully and thoroughly before using the product.
The MP905 extends the measurement depth of the instruments to
5 inches—the length of the MP905's twin probes. Like the pins on
any pin-type moisture meter, the twin probes sense the resistance
between them and convert that resistance to a voltage. Circuits
inside the Deep Sensing Moisture Meter read that voltage as a
proxy for the moisture level of the underlying wood or building
material.
OPERATING INSTRUCTIONS
1. Drill two 1/4 in. (6mm) diameter holes 3/4 in. (18mm) apart and up
to 5 in. (127mm) deep into the wall or baseboard (left figure below).
2. Remove the small rubber yellow plug from the External Probe
jack on the right side of the MMD900, MMD950 or MMD950W.
3. Insert the white plug at the end of the MP905 cable into the jack.
4. Push the twin probes into the drilled holes as deeply as required
(right figure below)
5. While firmly holding the probes, read the moisture level on the
LCD of the meter.
3/4 in.
(18mm)
1/4 in.
(6mm)
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