Zero Calibration; Span Calibration - WatchGas NEO Quick Start Manual

Zero Calibration

Zero calibration sets the baseline for the sensor and is
done in normal fresh air or other clean air source.
• To enter fresh air calibration:
Config Mode › Calibration › Zero Calib.
• To start fresh air calibration:
Press the Right Key and a count-down timer
starts. When the count-down is finished, "Pass" or
"Fail" will be displayed. To abort the zero calibrati-
on use the Left Key during count down.

Span Calibration

Span calibration defines the response of the sensor to
the gas. It is done with a known concentration gas.
• To enter span calibration:
Config Mode › Calibration › Span Calib
• To start span calibration:
Apply Gas › Start Calibration ›Wait Count-down
Finish › Get Result.