Emerson Rosemount CT5400, Installation, Operation And Maintenance Manual

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14.
To perform a zero verification for another gas, press .
The software returns to the Select gas screen ( Figure 5-1 ).
15. Repeat the actions in steps 6-13 for the next gas.
16.
To perform a span verification, press . Then follow the span verification
procedure in Section 5.1.2 .
17.
If you are finished verifying the analyzer, press .
The software returns to the Gas Sensor Main screen ( Figure 4-7 ).
5.1.2 Span verification
To verify the span gas concentrations measured by the analyzer when reference gas is
flowing, use the following procedure.
Prerequisites
Run the analyzer at a stable temperature for at least thirty minutes prior to commencing
this procedure.
Procedure
1. Use a certified reference gas cylinder as the source of the span verification gas.
2. Make sure that a pressure regulator is connected to the reference gas bottle.
3. Connect a hose from the reference gas bottle, through a T-piece, to the sample
supply port on the rear panel of the analyzer.
4. Connect an excess flow line to the unused port on the T-piece and route the excess
flow line to a suitable extractor.
5. On the display controller, browse to the Main menu as described in Section 4.9 .
6.
Using and , select
GAS SERVICE
( Figure 5-7 ).
Verifying Gas Concentrations
Installation, Operations, and Maintenance Manual 39