Model NGA 2000 TO2
Instruction Manual
a.Quick Start
This analyzer module is equipped with a quick start feature which allows the sen- sor to begin measuring low ppm oxygen faster. This feature can be used when the analyzer is first turned on to decrease the time required for the sensor to reach equilibrium. This function is most effective for gas sample measurements below 100 ppm. To maintain sensor life, it is recom- mended that this feature be used no more than two times in any 24 hour period.
A normal start can take from 2 to 72 hours depending on the concentration being measured. The lower the oxygen concen-
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| Analyzer basic controls (calibration) & setup… |
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| Analyzer and I/O, expert controls & setup… |
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| System configuration and diagnostics… |
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| Display controls… |
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| Time & Date: |
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| 10:30:05 August 10 2001 | |||||||
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| Measure |
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| Status… |
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| Lock… |
| MFG Data | |
tration in the sample gas, the longer the analyzer will take to reach equilibrium.
To abort the quick start, move the cursor to the “Exit quick start!” line and press the
↵key. The quick start process will cease but another quick start should not be at- tempted until the “Next quick start possi- ble after:” timer reaches zero. This timer provides the means to avoid more than two quick starts in any 24 hour period.
The “Quick Start” function can be ac- cessed from the “Measure” display by pressing F5 (BasicCal) or from the Main Menu as follows:
From the Main Menu, move the cursor to Analyzer basic controls (calibration) & setup…
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| Range number: | 4 |
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| Range upper limit: |
| 100 ppm |
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| Initiate quick start! |
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| Exit quick start! |
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| Exit Sleep mode! |
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| Next quick start possible after: |
| 35343 s |
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| Quick start timer: |
| 45 s |
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| Sleep mode timer: |
| 2700 s |
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| Operation status: |
| Normal |
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| Measure |
| Status… |
| Back… |
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In the Basic controls and Setup menu, move the cursor to the “Initiate quick start!” line and press the ↵ key. The analyzer will begin the quick start function immediately. This proc- ess will take about 45 seconds. The “Quick start timer” will count down this period.
The last measured value is held for the dura- tion of the process to prevent false reading fluctuations.
Figure 3-9. Initiate Quick Start
Rosemount Analytical Inc. A Division of Emerson Process Management | Operation |
