KANOMAX 2211 Handheld IAQ Monitor - Manual (Page 44)

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8.2 Calibration Procedure – ZERO Calibration
Display Procedure
Connect ZERO gas tank and IAQ Monitor.
Press
Use
to select [7.CALIBRATION]
Press .
Use to select sensor (1.CO2 or 2.CO).
Press . (CO2 is selected in the example.)
Use to select [ZERO].
Press .
Use to select [1.ZERO], press .
…… Currently calibrating sensor （CO or CO2）
…… The value before calibration