Emerson Rosemount Analytical X-STREAM X2 Series Instruction Manual page 268

X-STREAM X2
Gasflow
Procedure
Time
Gasflow
Procedure
Time
7-30
7.4.3 Advanced Calibration
V4
Purging
10 s
V4
Zeroing
29 s
This procedure is just a combination of the
two described before: At the beginning all
channels are zeroed and then all channels are
spanned: Watch the screen for status infor-
mation (in the following explained by means
of exemplary figures; valve designators for
example only).
The first screen appearing shows that valve
V4 is open. Currently the system is purged
(prepurge) to ensure it is properly filled with
span gas when span calculation is started.
Here the remaining purge time is 10 seconds
(decreasing from the value entered in the
calibration setup screen,
When the prepurge time has elapsed, the
instrument starts to calculate the zero point
(here indicated by the procedure term Zero-
ing) for all channels with the same zero gas
valve assigned: Zero gas is still applied, the
time count down starts at 40 s.
Note!
Multi channel instruments zeroing more than
1 channel at a time, show Zeroing in the
procedure line while calibration is ongoing. To
see which channels are currently calibrated,
see the status line in the measuring screen.
Now the instrument is checked for additional
channels not yet zero calibrated and if there
are any, the procedure begins again with the
first step as described at the top of this page,
now with another valve (zero gas).
Once all channels are zero calibrated, auto-
matically a span calibrate all channels proce-
dure is started:
Emerson Process Management GmbH & Co. OHG
Instruction Manual
HASX2E-IM-HS
10/2012
page 7-14).