NGA 2000 CLD
Instruction Manual
June 2007
The CLD analyzer module may require periodic calibration with known zero and span gases in order to maintain a desire level of analytical accurancy. It is recom- mended, after initial startup, that the CLD Analyzer Module is calibrated at least once every eight hours.
This practice should continue until evidence indicates that some other interval is more appropriate depending on the analytical accurancy required.
Calibration is the process of flowing known zero or span calibration gas into the analyzer for a specified period (averaging time), after which the analyzer will automatically set its zero or span factors so that the concentration measurement equals the calibration gas value. A limit can be set, beyond which any attempt by the analyzer to reset its concentration measurement will cause a warning alarm. In this case, user intervention would be required to reset the alarm and attempt another calibra- tion.
a.Calibration Setup
Calibration Gas List
This menu is used to set the concentration values of the calibration gases for each range.
Main (Menu)...
Analyzer and I/O expert controls & setup...
Analyzer module setup...
Calibration gas list...
| Line#1 |
| Calibration Gas List | 0.000 ppm | ||||
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| Zero gas - range 1: |
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| 0.00 ppm |
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| NO Span gas - range 1: |
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| 10.00 ppm |
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| NOx Span gas - range 1: |
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| 10.00 ppm | |||
| Zero gas - range 2: |
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| 0.00 ppm | |||
| NO Span gas - range 2: |
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| 19.90 ppm | |||
| NOx Span gas - range 2: |
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| 19.90 ppm | |||
| Calibration... |
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| HOME |
| ESCAPE |
| MORE |
| INFO | |
Figure
Channels 1 and 2
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| MORE... |
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| Line#1 |
| Calibration Gas List | 0.000 ppm | ||||
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| Zero gas - range 3: |
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| 0.00 ppm |
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| NO Span gas - range 3: |
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| 101.0 ppm |
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| NOx Span gas - range 3: |
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| 101.0 ppm | |||
| Zero gas - range 4: |
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| 0.00 ppm | |||
| NO Span gas - range 4: |
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| 250.0 ppm | |||
| NOx Span gas - range 4: |
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| 250.0 ppm | |||
| Calibration... |
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| HOME |
| ESCAPE |
| MORE |
| INFO | |
Figure
Channels 3 and 4
If not yet done, put in the ozonator and zero gas concentrations that you supply to the analyzer. See gas cylinder certification for exact values.
In case that measuring ranges differ from ordering code, put in the measuring ranges:
Main (Menu)...
Analyzer and I/O, expert controls & setup...
Analyzer module setup...
Gas measurement parameters...
Range settings...
| Line#1 |
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| 0.000 ppm |
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| Range Settings |
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| Minimum Range: |
| 9.9 ppm |
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| Maximum Range: |
| 999.0 ppm |
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| Range 1 lower limit: |
| 0.0 ppm |
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| Range 1 upper limit: |
| 10.2 ppm |
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| Range 2 lower limit: |
| 0.0 ppm |
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| Range 2 upper limit: |
| 24.9 ppm |
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| Range 3 lower limit: |
| 0.0 ppm |
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| Range 3 upper limit: |
| 100.0 ppm |
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| Range 4 lower limit: |
| 0.0 ppm |
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| Range 4 upper limit: |
| 500.0 ppm |
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| HOME |
| ESCAPE |
| INFO |
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Figure
NOTE
In case that only one measuring range is in use, we suggest to set all other measuring ranges to the same value to prevent calibration failure. When doing so, set also all test gas values to the same value.
3 - 4 Operation | Emerson Process Management GmbH & Co.OHG |