Emerson Rosemount 700XA Reference Manual page 27

Reference Manual
2-3-9000-744
For calibration, the controller assembly may average several analyses of the calibration
stream.
1.4.9 Basic analysis computations
Two basic analysis algorithms are included in the controller assembly:
Area analysis
Peak height analysis
NOTICE
Consult the
for more information.
Concentration analysis - response factor
Concentration calculations require a unique response factor for each component in an
analysis. These response factors may be manually entered by an operator or determined
automatically by the system through calibration procedures (with a calibration gas
mixture that has known concentrations).
The response factor calculation, using the external standard, is:
where
ARF
Area
Cal
n
Ht
n
HRF
The controller assembly stores calculated response factors to use in the concentration
calculations; these response factors are printed out in the configuration and calibration
reports.
Average response factor is calculated as follows:
where
RFAVG
Rosemount 700XA
Rosemount MON2020 Software for Gas Chromatographs Reference Manual
Area response factor for component n in area per mole percent
n
Area associated with component n in calibration gas
n
Amount of component n in mole percent in calibration gas
Peak height associated with component n mole percent in calibration gas
Peak height response factor for component n
n
Area or height average response factor for component n
n
Calculates area under component peak.
Measures height of component peak.
Overview
June 2022
27