CAI 700 NDIR, Operator'S Manual

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700 NDIR Analyzer 6-20-2017
50
Initiate Sequenced Cal
→ → → →
Because of timing requirements, sequenced calibrations are generally used only
when the analyzer is controlling the flow of zero and span gases into the analyzer.
To initiate a sequenced calibration, press from the Automated Calibration menu.
A sequenced calibration has seven steps. The Current Status of each step is shown just
below the expected gas concentration (in this case, it is Purging with Sample). Each step
uses a countdown timer set up in AutoCal Timing , located in the Calibration Setup menu.
The sequence (with the current range indicated) is as follows:
1. Zero Range 1 Purging
– Allows time for the zero gas to flush out any residual
gases that may still be present in the detection path.
2. Zero Range 1 Calibrating – The calculated zero is set as the new offset value, as
long as it is within the Maximum Calibration Error limits.
3. Zero Range 1 Verifying – The analyzer verifies that the calibrated zero value has
not deviated outside the operator-set allowable Maximum Verifying Error .
Analyzer Channel
Span Gas Concentration
Countdown Timer Current Date and Time
Current Status
Current Concentration
Range and Range Limit