MO250 Datasheet, PDF (4/6 Pages) Extech Instruments Corporation. – Moisture Meter

4. Carefully push the electrode pins a minimum of 0.07” (2mm) into the material under
test. Note that the pins should be
inserted into wood perpendicular
to the wood’s fiber structure. For
high moisture readings, it may
take several minutes for the
0.07” (2mm)
meter reading to stabilize.
5. Take several readings in several
locations on the material for the
best representation of the
amount of moisture present.
6. Read the measurement values
on the LCD digital display or the LED bar graph (see bargraph diagram)
7. Replace the protective cap when finished.
1. Material 1 (non-wood) moisture scale 13-100%
2. Material 2 (wood) moisture scale 6-40%
3. LED bargraph reading
4. Color code for material 2 (High Moisture)
5. Color code for material 2 (Medium Moisture)
6. Color code for material 2 (Low Moisture)
7. Color code for material 1 (High Moisture
when LEDs reach darker color)
Data Hold feature
The Data Hold function freezes the reading in the display. Press the HOLD key
momentarily to activate the Data Hold function. The reading will freezee and the ‘HOLD’
display icon will appear. Press the HOLD key again to exit the Data Hold function (the
HOLD display icon will switch off).
Max/Min Memory feature
The meter’s Max/Min feature allows the user to take multiple readings while storing the
highest (Max) and lowest (Min) readings.
1. Press the REC MAX/MIN key to activate the MAX/MIN recording mode. The
display icon ‘REC’ will appear. Now begin taking measurements.
2. To view the MAX reading, press the REC MAX/MIN key again. The display icon
‘MAX’ and the maximum recorded value will appear on the display. The meter will
now display and hold the maximum reading. To return back to the MAX/MIN
recording mode, press the ‘HOLD’ key. It will update only when a new ‘Max’
occurs.
3. To view the stored Min reading, press the REC MAX/MIN key again. The display
icon ‘REC MIN’ and the minimum value will appear on the display. The meter will
display and hold the minimum reading. To return back to the MAX/MIN recording
mode, press the HOLD key. It will update only when a new ‘Min’ occurs.
4. To exit MAX/MIN mode press and hold the REC MAX/MIN key for 2 seconds then
release. The display icon ‘REC’ will switch off.
4
MO250 V2.1 6/06