Wohler RF 220 Mode D'emploi page 13

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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
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.
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Wöhler RF 220
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