Emerson Process Management GmbH & Co. OHG4-16
X-STREAM X2FD
Instruction Manual
HASXMDE-IM-EX
01/2015
4.4 Perform a Calibration
4.4 Perform a Calibration
The following steps describe, how to per-
form a manual calibration. If your instrument
features a valve block,
X-STREAM X2
instruction manual for a comprehensive de-
scription of calibration procedures.
Note!
To achieve best and proper measuring re-
sults, it is recommended to perform zero and
span calibrations on a regular weekly basis.
Also, a span calibration must always be pre-
ceded by a zero calibration!
Zero calibration
To perform a zero calibration supply either
nitrogen (N
2
) or another suitable zero gas
[conditioned ambient air or industrial air (NOT
for oxygen measurement!)] to the gas path.
The concentration of the component of inte-
rest is specifi ed as set point and during zero
calibration, the actual value is assigned this
concentration
Span calibration
Supply span gases with concentrations of
80 % to 110 % of the upper measuring range
limit to the gas path. (Using lower concentra-
tions may decrease accuracy when measu-
ring above the span gas concentration) The
concentration of the component of interest
is specifi ed as set point, and during span
calibration the actual value is assigned this
concentration!
Note!
If the oxygen concentration is known, ambi-
ent air may be used for an oxygen channel
span calibration.
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