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X-STREAM
Emerson Process Management GmbH & Co. OHG 7-33
Instruction Manual
HASAxE-IM-HS
05/2006
7 Maintenance
7-3 Calibration Procedures
7-3-8 Cross Interference Compensation
Note!
The following is valid for dual channel
instruments only!
Several gases interfere the measuring results
when appearing in the gas stream at the same
time. The effect is that the concentration shown
for component A is differing from the effectively
present concentration due to influence of the
component B, which in- or decreases the
concentration shown for component A.
X-Stream gas analyzers allow to calculate and
consider this effect of cross interference by
means of a special calibration procedure:
Calibrating the instrument once using pure
span gases (instead of the standard span
gases to be used for all following calibrations)
allows the analyzer to calculate the effect of
cross interference and to consider it during all
following measurements and standard
calibration procedures.
To do so, follow the instructions below:
Enter the Cross Interference screen
If system is setup accordingly access level 3
code must be entered to access this menu.
CrossInterference
Status: Off
@ Span Cal: No
Setup..
Measurement..
CrossInterference..
Setting the STATUS to On activates the cross
interference compensation. To calculate the
effect of interference during the next following
calibration set the @SPAN CAL parameter
to YES. (This parameter is automatically reset
to NO after the this calibration was performed).
In a next step ensure the span gases for both
channels are applied and are of pure quality!
(Pure span gases are only required for this
special calibration procedure. Further
calibrations can be performed with standard
span gases).
CrossInterference
Status: On
@ Span Cal: Yes