53
Calibration and Bump
ALTAIR io360
US
Span Calibration
Span calibration immediately follows a Zero calibration.
Once the Cal RFID tag is read, a Zero calibration will initiate Screen will
display 'Zero Test' and LEDs will flash blue.
NOTE:
Do not install the Calibration Cap during Zero Calibration!
After Zero calibration completes, the detector will:
Pass:
Check mark and 'Install Cap' text are displayed.
Fail:
• Beep
• Display red LEDs
• Display 'X' and 'Zero Fail' text
During zero calibration the O
2
sensor is also span calibrated to 20.8 % O
2
fresh air,
adjusting the calibration curve as needed. During span calibration, the O
2
sensor's accuracy
is checked against a known oxygen gas concentration without adjusting the calibration
curve.
A span calibration can fail for many reasons besides sensor at the end of his life. If a span cali-
bration failure occurs, items such as remaining gas in the calibration cylinder, gas expiration date,
security of the Calibration Cap, etc. should be verified and calibration should be repeated prior to
replacing the sensor.
(1) Snap the Calibration Cap onto the detector.
(2) Insert tab on Calibration Cap into slots on detector.
(3) Press Calibration Cap as shown until it seats onto detector.
a) If needed, connect one end of the tubing to the Calibration Cap.
b) If needed, connect other end of tubing to the cylinder regulator.
The detector will show blue LEDs and display 'Apply Gas'.