Span Calibration
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To skip the Span procedure, push the p button.
If no button is pushed for 30 seconds, the device returns to Normal Operation mode.
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1.
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Once the Zero is set, the SPAN CAL? screen displays. |
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2.
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Connect the regulator to the calibration check gas cylinder. |
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3.
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Connect the appropriate calibration gas to the device. |
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5.
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Open the pressure reducer valve on test gas cylinder. |
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6.
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Press the  button to calibrate (span) the device. |
SPAN calibration starts.
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7.
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Close the valve after SPAN calibration. |
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After the SPAN calibration completes, the device momentarily displays “SPAN PASS” or “SPAN ERR” along with the label of any sensor that failed then returns to Normal Operation mode. |
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If a sensor is nearing its end of life, this "SPAN PASS" indication will be followed by the end of sensor life warning (© symbol). The © symbol, and the gas type of the sensor nearing its end of life, will blink for 15 seconds when the device returns to Normal Operation mode. When in Normal Operation mode, the © symbol is continuously displayed.
Finishing Calibration
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1.
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Close the valve on the regulator. |
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2.
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Remove the calibration cap. |
The calibration procedure adjusts the span value for any sensor that passes the ca-libration test; sensors that fail calibration are left unchanged. Since residual gas may be present, the device may briefly go into an exposure alarm after the ca-libration sequence is completed.
Autocalibration Failure
If the span calibration is unsuccessful:
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If the device cannot calibrate one or more sensor(s), it goes to the SPAN ERR page and remains in alarm until the p button is pressed. |
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A sensor life indicator is displayed (Alarm symbol and © symbol) to show the sensor has reached its end of life and should be replaced. |
This occurs if the span calibration is unsuccessful twice.
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The device will remain in alarm state until the p button is pressed. |
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The Alarm symbol and © symbol will remain on the display until a successful calibration or sensor in question is replaced. |
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A span calibration can fail for many reasons besides sensor at the end of his life. If a span calibration 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.
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