MO290 Datasheet, PDF (4/8 Pages) Extech Instruments Corporation. – Pinless Moisture/Humidity Meter + IR

Operation
Powering the meter
1. Remove the RH sensor protective cap before use.
2. Press the power button to turn the meter on.
3. If the symbol appears or the meter does not turn on, replace the battery.
Humidity (Dew point, GPP, g/kg) Measurements
1. Press the power button to turn the meter on.
2. Press the RH button
3. Relative Humidity will be displayed in the primary display and the temperature will be
displayed in the secondary display.
4. Press the up or down arrow button to change the temperature units.
5. Press the MODE button to display the DEW point.
6. Press the MODE button to display GPP (°F) or g/kg (°C)
Pinless Moisture Measurements
1. Press the power button to turn the meter on.
2. Press the MOIST button to select Moisture measurement.” MOIST”, and “INT”
(internal pinless sensor) will appear in the display.
3. Hold the meter so that the rear sensor is away from any surface or your hand. The
reading should be near 0.0. If not, press and hold the ZERO button for more than 2
second and the ZERO icon appears.
4. Place the rear sensor on the surface of the material to be tested and read the relative
moisture content.
Pin Type Moisture Measurements
1. Connect the external pin probe to the jack on the bottom of the meter.
2. Press the power button to turn the meter on.
3. Press the MOIST button twice to select Moisture measurement.” MOIST”, and “EXT”
(external pin probe) will appear in the display.
4. Press the probe pins into the material and read the % moisture content in the display.
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MO290 V3.0 03/09