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CONFIGURATION & FIELD CALIBRATION
2.3 ZERO ALL RANGES
All sensors must be zeroed before the calibration can
commence. Make sure that the instrument is in clean air.
Fig. 2.9 Before Zeroing
To zero all ranges:
• Press ZERO .
Note: If an oxygen sensor is fitted, the sensor
is zeroed to 20.9% Oxygen.
Fig. 2.10 After Zeroing
To move to the calibration screen:
• Press OK .