General Tools and Instruments MMD900 - 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.)
You can use the meter immediately to measure moisture levels using the
factory-set defaults for beeper and backlight operation and auto power off
activation time. By default:
• The beeper is enabled, and beeps faster the higher the readout above
17%WME in pin measurement mode (17 in REL mode).
• The auto power off function is disabled.
• The backlight is off.
To change the default settings for the beeper, backlight or auto power
function, follow the Advanced Setup Instructions beginning on p. 10. At a
minimum, General recommends changing the default for the auto power off
function to “enabled”. If you leave the auto power off function disabled, you run
the risk of discharging the meter’s battery if you forget to power the meter off
when you are finished using it.
MEASURING MOISTURE LEVELS
Surface moisture levels should be measured by the test pins if the surface
being tested can tolerate pinholes. If it cannot, use the meter’s pinless sensor.
Internal moisture levels can be gauged by the pinless sensor for comparison
purposes.
The first step in measuring the surface moisture level of a material is to decide
whether to use the test pins on top of the meter or the test pins at the end of
the remote probe. Choose the remote probe if:
• Access to the target surface is limited (for example, if the surface is in
close quarters or a corner; the remote probe is slightly narrower than
the meter).
• You need to make one or more measurements above shoulder height,
near floor level, around a corner, or at any angle that makes it hard or
impossible to read the display. In situations like these, it’s easier to use
the meter by cradling it in your off hand, with the display facing you,
while using your dominant hand to position the remote probe.
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