MO290 Datasheet, PDF (5/8 Pages) Extech Instruments Corporation. – Pinless Moisture/Humidity Meter + IR

Infrared Temperature Measurements
1. Press the power button to turn the meter on.
2. Press the IRT button to enable the IR thermometer and the laser pointer. The laser
pointer icon will flash while the mode is active.
3. Press the up or down arrow button to change the temperature units
4. Aim the laser pointer at the surface to be measured and read the surface temperature
in the secondary display.
5. Release the IRT button. The last temperature measured and the laser icon will remain
on the display for approximately 10 seconds before returning to ambient temperature
measurement.
IRT MAX MIN display:
The meter can be set to display only the maximum or minimum temperature measured
during an IR scan.
1. With the meter in the IR hold mode, press the MODE button. “MIN” will appear in
the display.
2. Press the IRT button to enable the IR thermometer. The meter will display the
minimum temperature measured and will update only when a lower temperature is
measured.
3. Press the MODE button twice to enable the MAX mode and proceed as stated
above for the maximum temperature.
4. The MAX or MIN temperature is not stored when the function is exited.
IR Field of View
Ensure that the desired target is larger than the spot size. As the distance from an object
increases, the spot size of the area measured by the meter becomes larger. The meter’s
field of view ratio is 8:1, meaning that if the meter is 8 inches (cm) from the target, the
diameter (spot) of the object under test must be at least 1 inch (cm). Refer below to the
field of view diagram.
2” @ 16”
1” @ 8”
20mm @ 160mm
40mm @ 320mm
WARNING: Do not directly view or direct the laser pointer at an eye. Low power
visible lasers do not normally present a hazard, but may present some potential for
hazard if viewed directly for extended periods of time.
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MO290 V3.0 03/09