NGA 2000 CLD
Instruction Manual
June 2007
b.Flow Balance Adjustment:
To adjust the Flow Balance Valve, select:
Main (Menu)...
Analyzer basic controls (calibration) & setup...
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| 0.000 ppm | |||||
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| Measurement range number: |
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| 1 |
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| Range upper limit: |
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| 24.9 ppm |
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| Automatic range change control: |
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| Disabled | ||||||||
| Ranges with valid calibration: |
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| 1&2 | |||||||
| Calibration status: |
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| READY | |||||
| Span gas concentration: |
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| 10.0 ppm | |||||
| Status: |
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| NORMAL | |||
| Measurement Mode: |
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| NOx mode | |||||
| Ozonator status: |
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| OFF | |||||
| Ozonator power: |
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| Enabled | |||
| Pressure limits... |
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| HOME |
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| NO/NOx |
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| ZERO |
| SPAN |
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| INFO | |
Span Adjustment
After that, do a Span adjust in the same measuring range.
For that, push the F4 softkey in the Basic Controls menu, so that the Analyzer Span menu turns up:
Line#1 | 0.000 ppm |
| Analyzer Span |
Are you sure ? |
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You must have span gas flowing through the analyzer.
| Calibration time: |
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| 24 s | ||
| Measurement range number: |
| 1 | |||||
| Span ranges: |
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| SEPARATELY | |||
| Calibration status: |
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| READY | ||||
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| CAL OK | ||||
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| HOME |
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| NO/NOx |
| SPAN |
| INFO |
Figure
To adjust the flow balance, select the measuring range that is really in use and do a
Zero Adjustment
In the Basic Controls menu, push the F3 softkey and enter the Analyzer Zero menu.
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| Analyzer Zero |
| 0.000 ppm | |||
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Are you sure ? |
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You must have zero gas flowing through the analyzer. |
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Calibration time: |
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| 24 s | ||
Measurement range number: |
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| 1 | |||||
Zero ranges: |
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| SEPARATELY | |||
Calibration status: |
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| READY | ||||
Error message for last zero: |
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| CAL OK | ||||
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HOME |
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| ESCAPE |
| ZERO |
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| INFO |
Figure
Push the F3 softkey again, to start the zeroing process. Be sure to have zero gas flowing through your analyzer and to have it purged it from sample gas before.
When the zeroing process is finished, "Calibration sta- tus" will turn to "READY".
Figure
Push the softkey F4 again to start the spanning sequence. Be sure to have span gas flowing through your analyzer and to have it purged before.
When the spanning sequence is finished, the "Calibra- tion status" will turn to "READY".
When having completed the zero- and span adjust in NO mode, switch over to NOx mode by pressing the F2 softkey in the Basic Controls menu. Observe the measuring value after switching into NOx mode:
•If the measuring value stays constant (maybe af- ter a short peak immediately after switching into NOx mode), your flow balance is perfectly adjusted and your analyzer is ready for measurement.
•If the measuring value changes after switching to NOx mode, turn the flow balance valve carefully until the difference between measuring values in NO mode and NOx mode is minimized.
To make sure that your analyzer is correctly calibrated, switch back to NO mode, if necessary, repeat zero- and span adjustment and check for an existing difference between measurement in NO mode and in NOx mode.
3 - 6 Operation | Emerson Process Management GmbH & Co.OHG |