Span Calibration

To skip the Span calibration procedure, push the p button.

NOTE: If the SPAN calibration of the combustible sensor is skipped after a successful ZERO calibration, the combustible sensor reading may be replaced with a moving display of “PLEASE WAIT” for a few moments. This is normal, and the device is fully operational once a combustible gas reading reappears.

If no button is pushed for 30 seconds, span calibration is skipped.

Because of the different possible combinations of gases that are possible, skipping a Span calibration could advance the user to the Span calibration of another installed sensor, or back to Measuring mode.

When calibrating with combustible gases > 100 % LEL, select the "Yes" option to prompt "Span Calibration?" BEFORE applying gas to the device.

1. Connect one end of tubing to the cylinder regulator (supplied in the calibration kit).
2. Connect the other end of the tubing to the pump inlet.

3. Press the q button to calibrate (span) the device.
○ “SPAN CALIBRATION“ flashes
○ SPAN calibration starts.
○ A progress bar shows the user how much of the calibration has already been completed.

NOTE: After the SPAN calibration is completed, the device displays either

• “SPAN CALIBRATION PASS”

or

• “SPAN CALIBRATION FAIL”

NOTE: 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.
4. Reattempt the span calibration before replacing the sensor.