Emerson Rosemount CT5800, Manual

Page: 85 / 192

Figure 6-6: Result Screen
11. After the required flush time (dependent on analyzer configuration), the top line on
the screen changes from
Calibrate zero
to
Result
.
This shows the zero calibration is complete.
12. Press to finish the process.
13. Press to display the
Calibrate gas
screen ( Figure 6-4 ) and perform a span
calibration on the same gas (see Span calibration ).
6.3.2 Span calibration
Span calibrate to verify the span gas concentrations measured by the analyzer when
reference gas is flowing and, if necessary, calibrate them against the known reference gas.
Prerequisites
Run the analyzer at a stable temperature for at least 30 minutes prior to commencing this
procedure. Startup takes 90 minutes to achieve the required temperature.
Procedure
1. Use a certified reference gas cylinder as the source of the span calibration 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. Connect an excess flow line to the
unused port on the T-piece and route the excess flow line to a suitable extractor.
4. On the display controller of the analyzer, browse to the Main menu as described in
Main menu .
5. Refer to Figure 6-2 . Using and , select
GAS SERVICE
.
6. Press .
The Select gas screen ( Figure 6-7 ) opens.
Reference Manual Gas calibration
00809-0100-5800 September 2019
Rosemount CT5800 85