6. Press [+], and this screen appears:
7. Start the gas flow.
8. Press [+]. A countdown screen is shown as the calibration is
performed:
Note: You may abort the calibration during the countdown by
pressing [-]. If you stop the calibration, the process stops and
this screen is displayed before the menu screen is shown:
9. Once the calibration is complete, this screen is shown:
10. If the calibration is not successful, and you see the “Span
Low Failed!” message, check that the inlet is not blocked,
the sensor or lamp are not fouled or damaged, and there are
no other problems before retrying.