Emerson Rosemount CT5800, Manual

Page: 73 / 192

Figure 5-4: Verify Zero Screen
7. Allow the concentrations to stabilize and wait for two minutes after stabilization.
This screen gives a reading of the concentration of the selected gas that is present
as an impurity in the nitrogen calibration gas, as measured by the instrument. In the
example (
Figure 5-4 ), the gas being measured is NH
3
(ammonia), and the
instrument has detected a concentration of 0.40 ppm.
8. If the reading is within tolerance, no further action is required. Press to end the
zero verification process.
The display controller proceeds to the
Result screen ( Figure 5-5 ).
Figure 5-5: Result Screen
9. If the reading is outside tolerance, you need to zero calibrate the analyzer.
Refer to Zero calibration .
10. In either case, press to return to the Calibration / Verification Complete screen
( Figure 5-6 ).
Reference Manual Verifying gas concentrations
00809-0100-5800 September 2019
Rosemount CT5800 73