Sper scientific 800019, Instruction Manual

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MEASUREMENT PROCEDURES
1. Turn the meter on/off by pressing the
POWER button.
2. RH (Relative Humidity) will appear in large
digits on the lower display and temperature
in smaller digits on the upper display.
3. Hold the red button down for 2 seconds to
toggle between temperature readings in
°C and °F.
4. Press the red button to toggle between
WB (Wet Bulb), DP (Dew Point) and
ambient temperature.
BACKLIGHT
Press for 2 seconds to turn the illuminated
display on/off.
HOLD FUNCTION
With the meter on, press the HOLD button