MSA ALTAIR 5X PID Operating Manual page 47

US
After the SPAN calibration is completed, the device
displays either
"SPAN CALIBRATION PASS"
or
"SPAN CALIBRATION FAIL"
The device returns to Measuring mode.
If a sensor is nearing its end-of-life, the "PASS" display is followed by the Sensor Life indicator ♥display.
• While the sensor is still fully functional, this warning gives the user time to plan for a replacement sensor to minimize
downtime.
• The ♥ indicator blinks as the device returns to Measure mode.
• After 15 seconds, the blinking stops, but the ♥ indicator continues to display during ongoing operations as a reminder of
a sensor's pending end-of-life.
If a span calibration fails:
• The Sensor Life Indicator ♥ blinks to show a sensor has reached its end-of-life and should be replaced.
• The device remains in the Sensor Life alarm condition until the p button is pressed.
• After the alarm is cleared, the device enters Measure mode and the Sensor Life indicator ♥ blinks during ongoing
operations until the sensor is replaced and/or successfully calibrated.
Span calibration can fail for reasons other than a sensor at the end of its life. If a span calibration failure occurs, verify items
such as:
• sufficient gas remaining in the calibration cylinder
• gas expiration date
• integrity of calibration tubing/fittings, etc.
Reattempt the span calibration before replacing the sensor.
5.10.3 Finishing Successful Calibration
1. Remove the calibration tube from pump inlet.
The calibration procedure adjusts the span value for any sensor that passes the calibration test. Sensors that fail calibration
are left unchanged.
On the display, each successfully calibrated sensor temporarily shows a √ symbol at its gas reading.
These √ symbols remain visible for a few moments and are then replaced by the present gas reading.
47 ALTAIR 5X PID
5 Operation