Fresh Air Calibration
Zero calibration sets the baseline for the sensor and is
done in normal fresh air or other clean air source.
•
Enter fresh air calibration:
•
Config Mode Calibration Fresh Air Calib.
•
Select sensors to be zeroed in the same manner
as described for Bump testing.
•
Start fresh air zero:
•
Press the Left key and a count-down timer starts.
When the count-down is finished, “Pass” or “Fail”
will be displayed. To abort the zero calibration use
the Left key during count down.
•
The Oxygen sensor is set to 20.9% during Fresh
Air calibration and can be zeroed using the
Nitrogen Calib menu.
Span Calibration
•
Span calibration uses known concentrations of
gas to define the response of the sensor(s) to
the gas(es). Multiple sensors can be calibrated
simultaneously using a gas mixture. Use a fixed-
flow regulator providing about 0.5 LPM. For
pumped units a demand-flow regulator can also
be used.
•
To Set Span Value:
•
Config Mode Calibration Menu Span Value
•
Press Right to highlight a sensor, Left to select
and Left [+/OK] again to increase or decrease that
sensor’s span concentration. Repeat with other
sensors as needed.
