General MM1E Guia Del Usuario página 7

To check the calibration of the MM1E, remove the
protective cap from the top of the meter, taking care not to
stab yourself with the two sharp pins beneath the cap. Then
turn the cap over and place its two holes over the two pins.
If the meter is calibrated, an LED at the 20%, 21% or 22%
position on the HIGH scale will illuminate.
To measure the moisture level of a material, place the test
pins on it. If the material has a moisture level between 16%
and 35%, one of the LEDs will light. The number at its right
indicates the moisture level in %WME.
If the moisture level is higher than 35%, the bottom LED will
light. This indicates that the material's moisture level is
beyond the range of the MM1E. If the material's moisture
level is less than 16%, no LED will light.
To determine whether the material's moisture level is
between 16% and 35%, slide the Power/Scale switch on the
back of the meter to the LOW position. If one LED lights, the
number at its left indicates the moisture level in %WME. If no
LED lights, the material's moisture level is less than 16% and
beyond the measurement range of the MM1E.
Some measurement tips:
1. To locate the source of a leak behind wood, plaster, drywall
or a ceiling, make measurements at different locations. The
leak is located when the meter displays the highest
reading.
2. Never use force to drive the pins into a hard surface.
3. When measuring the moisture level of soil, surface
readings will be lower than readings with the test pins
deep in the soil.
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