General Tools and Instruments MMH800 - Manual (Page 8)

OPERATING INSTRUCTIONS
To power on the meter, press the button and hold it for at least three
seconds.
(To power off the meter, follow the same instruction.)
MEASURING MOISTURE LEVEL
To measure the moisture level of wood or a building material, first make
sure that its icon appears on the left side of the display. If it does not, press the
button briefly to toggle between wood and building materials. Next,
decide which sensor to use (the meter’s pins or pad) after considering
their pros and cons presented in the introduction. Either 1) Gently press or push
the pins at the top of the meter on or into the material or 2) Press the split pad
sensor on the back against a flat area of the material, making sure that both
sides of the pad touch the surface being measured.
The MMH800 provides three indications of a material’s measured moisture content:
1. A percentage reading on the upper display.
2. One, two or three droplet icons ( ) on the left side of the upper display
to indicate whether the reading is low, medium or high for the material.
The moisture-level range for each category is different for wood/paper
and building materials; see the Specifications section for the exact
percentages.
3. If enabled (the factory default), the meter’s repeating beeper will sound
at one of three rates (slow, medium or fast) corresponding to the
measured moisture level (low, medium or high). The audible changes
make it very easy to pinpoint areas of peak wetness.
To hold a measurement, press the button briefly. This “freezes” the
display and makes the
(lock) icon appear at the right of the reading. This
feature makes it possible to make a measurement in a dark place, hold the
reading, and display it later in a better-lighted area. To release the lock, press
the button briefly again. This makes the
icon disappear.
The meter’s beeper is enabled by default. To disable the beeper, press the
button and hold it for at least three seconds. This makes the icon
at the lower left of the display disappear. To re-enable the beeper, press and
hold the button again for at least three seconds. Each time the meter is
powered on, the unit reverts to the default state: beeper enabled.
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