Emerson Rosemount CT4400 Reference Manual page 47

Reference Manual
00809-0100-4244
12. This RESULT screen gives a reading of the concentration for the selected gas that is
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Reference Manual
Figure 5-12: Verify Span
present as an impurity in the calibration gas. In the example the gas being
measured is NH , and the analyzer has detected a concentration of 0.510 ppm.
3
Figure 5-13: Result Screen
If the reading is within tolerance, no further action is required.
If the reading is outside tolerance, follow the zero calibration procedure in
calibration
to end the span verification process
Verifying gas concentrations
January 2020
Zero
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