Wohler RF 220 Mode D'emploi page 16

3.2.1 ON/OFF key
Press the ON/OFF key to turn the Wöhler RF 220 on and off.
3.2.2 BKLT-key (Back light key)
Press this key to turn on the back light of the display for 10 seconds.
3.2.3 F/C CAL+ key
In normal mode, press this key to switch between the units C° and F.
In calibration mode, press this key more than one second to stop the calibration
manually.
3.2.4 HOLD key
Press this key to hold the current reading. Press this key again to unlock.
3.2.5 DP/WB-key (Dew Point/Wet Bulb temperature key)
Press this key to switch between dew point – wet bulb – temperature and relative
humidity).
3.2.6 RST/MN/MX key
Press this key to switch the display of min., max and the current value.
Press the key for more than one second to reset the min. and max value.
3.3 Printout
Via an infrared interface, the measured values can be transmitted to a thermo
printer.
To start the infrared transmission on RF 220, press the backlight key (light bulb
icon) for 2 seconds.
The LCD display blinks and transmission is in process. After the transmission it
will stop blinking.
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Wöhler RF 220