Model
Table 4 Enter Expected Span Gas Concentrations Procedure For NO & NOy
Step | Action | Comment |
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1. | Press | This key sequence causes the M200EU to prompt for the |
| expected NOy concentration. | |
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| Enter the NOy span concentration value by pressing the |
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| key under each digit until the expected value is set. |
2. | Press ENTR | ENTR stores the expected NOy span value. |
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3. | Press | Now enter the expected NO span concentration as in step |
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| one. |
4. | Press ENTR | Pressing ENTR stores the NO span value and returns the |
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| prompt to the CONC menu. |
5. | Press EXIT | Returns instrument to SAMPLE mode. |
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If desired, compensation for converter efficiency (CE) can be included in the NOy concentration calculation. Prior to calibration, the converter efficiency should either be set to 1.0 or determined per the procedure in the M200E manual.
Table 5 Span Calibration Procedure
Step | Action | Comment |
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1. | Press CAL | The M200EU enters the calibrate mode. |
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2. | Wait For Stability | Wait for reading to stabilize at span value. |
| Type STB < 2 PPB |
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3. | Press SPAN | If you change your mind after pressing SPAN, you can |
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| still press EXIT here without spanning the instrument. |
4. | Press ENTR | Pressing ENTR actually changes the calculation |
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| equations and causes the instrument to read the NO and |
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| NOy span concentrations. |
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5. | Press EXIT | M200EU returns to sampling. Immediately after |
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| calibration, data is not added to the DAS averages. |
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05386 Rev. D | 17 |