Emerson Rosemount Analytical X-STREAM X2 Series Instruction Manual page 269

Instruction Manual
HASX2E-IM-HS
10/2012
Gasflow
Procedure
Time
Gasflow
Procedure
Time
Gasflow
CO2.1
Procedure
Time
Emerson Process Management GmbH & Co. OHG
7.4.3 Advanced Calibration
V2
Purging
10 s
V2
Spanning
38 s
Sample
0.000 ppm
Purging
10 s
The procedure starts showing the screen
to the left, indicating that valve V2 is open.
Currently the system is purged (prepurge) to
ensure it is properly filled with span gas when
span calculation starts. Here the remaining
purge time is 10 seconds (decreasing from the
value entered in the calibration setup screen,
page 7-14).
When the prepurge time has elapsed, the
instrument starts to calculate the span point
(indicated by the term Spanning): Span gas
is still applied, the count down starts at 40 s.
Note!
Multi channel instruments spanning more than
1 channel at a time, show Spanning in the
procedure line while calibration is ongoing. To
see which channels are currently calibrated,
see the status line in the measuring screen.
After this calibration has finished, the instru-
ment is checked for additional channels not
yet span calibrated and if there are any, the
procedure starts again with the first step as
described at the top of this page, now with
another span gas valve.
After span calibrations have finished, the
instrument closes all span gas valves and
opens the sample gas valve. Now a postpur-
ge procedure starts to indicate that proper
sample gas measurement values require the
system to be filled with the related gas only.
Postpurge time is purge time plus 2x damping
time as entered in the calibration setup (
page 7-14) and measurement setup (
page 6-29).
The span calibration procedure has finished
when the last time interval shows remaining
0 seconds and the gas flow is sample.
Now press the HOME key to return to the
measuring screen.
X-STREAM X2
7-31