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VI. Operation instructions
1. Functional buttons
The following table shows the buttons functions in different modes.
Modes
Long press: turn on/off the meter
OFF
Long press: enter calibration mode
Short press: turn on/off the backlight
Short press to switch temperature unit ˚C/˚F
Long press to turn on/off audio alarm
Measure
Short press: cycle switch between HOLD/MAX/MIN/AVG/TWA/STEL
Long press: reset to zero
Long press: calibrate the CO2 concentration (outdoor fresh air)
Short press: increase the value
Short press : next parameter (double press to enter date/time
calibration)
Long press: save
Short press: decrease the value
Short press: previous parameter
Long press: exit calibration
Calibration
Functions
Buttons
+
MODE
+MODE
MODE
+MODE
+
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