CAI 700 NDIR, Operator'S Manual

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700 NDIR Analyzer 6-20-2017
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4. Span Range 1 Purging – Allows time for the span gas to flush out any residual
zero gas that may still be present in the detection path.
5. Span Range 1 Calibrating – The calculated span is set as the new gain value, as
long as it is within the Maximum Calibration Error limits.
6. Span Range 1 Verifying – The analyzer verifies that the calibrated span value
has not deviated outside the operator-set allowable Maximum Verifying Error .
7. Purging With Sample – Introduces sample gas back into the analyzer and clears
out any remaining gases so the current measurements will not be affected by any
residual calibration gases.
After these steps, if the calibration is successful, the display will briefly indicate
Calibration Finished in place of Calibration in Progress at the top of the screen. After a
successful calibration is completed, the analyzer will return to the Measure Screen.
If the calibration is unsuccessful, the display will briefly indicate Could Not Calibrate in
the Current Status line. At the same time, you will be alerted to whether an error occurred
in the zero or span portion of the calibration (for example, Span Gas Deviation Error!).
The analyzer will then return to the Measure Screen and will revert to the last successful
calibration values. A calibration error is set and will remain until cleared by a successful
calibration.
To view the verifying zero or span deviations, go to the
AutoCal Deviations menu under
Calibration Factors. To view or change the maximum allowable calibration tolerances,
see Deviation Limits.