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Thank you for purchasing a 3401 or 3402 Temperature/RH Pen. In
addition to temperature and RH, the 3402 also displays dew point
and wet bulb temperatures. Please read this manual thoroughly
before using your meter.
Specifications
Temperature range
14 to 140°F (-10 to 60°C)
Temperature accuracy
±1°F (±0.6°C)
Humidity range
5 to 95% RH
Humidity accuracy
±3% RH
Power Supply
CR2032 battery
Power ON/OFF
Power on the meter by pressing the ON/OFF button. All segments
on the display will appear for one second ("DP","WB" will appear on
the screen, although they are only operational for the 3402 model).
The meter will begin measuring temperature and humidity,
displaying both readings at the same time. “AIR” shows that the
current temperature and RH are being displayed.
Note:
Be sure to rotate the sensor cap to open it.
Selecting Temperature units (C/F)
Press the F/C CAL button to alternate between temperature units.
Data Hold
Press the HOLD button until “HLD” appears on the display. The
current reading will be displayed until the HOLD button is pressed
again to release the hold.
Operation