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MON20/20 Software for Gas Chromatographs User Manual
SEPTEMBER 2010 3-9000-745
4-7
The following table lists all of the editable parameters that are available
on the component data table. The standard values for these parameters
were taken from the second editions of the Orifice Metering of Natural
Gas and Other Related Hydrocarbon Fluids and the Compressibility
Factors of Natural Gas and Other Related Hydrocarbon Gases.
Parameter Description
Component This drop-down list contains the complete catalog of available components
for the selected stream.
Usr Std Indicates the source of the component:
• Usr - The component was edited or defined by the user.
• Std - The component was selected from the standard list of components
and no changes were made to its standard data.
Det # The component’s detector number.
Ret Time Time in seconds before the apex of the component's peak will appear. The
rentention time can be set from 0 to 3600 seconds.
CAUTION: Ensure that the component retention times do not exceed the
analysis time, as defined by the Timed Events table. MON 20/20 does not
automatically prevent the user from defining excessive component
retention times.
Resp Fact A component’s response factor is equal to the raw data of the component's
peak divided by the component's concentration.
The maximum value is 1.0E+38.
Calib Type MON 20/20 can perform four types of calibrations:
• Single-Level - Uses the standard calibration in which the response
factor is needed to determine the mole percentage during the calibra-
tion.
• Fixed - During the calibration, the response factor is not updated.
• Relative - Calibration in which a reference component is used to
compute the mole percentage.
• Multi-Level - Uses a polynomial equation to compute the mole percent-
age during the calibration. Values must be entered in the Mult-level
Calib 'a', Mult-level Calib 'b', Mult-level Calib 'c', and Mult-level Calib
'd' cells. See “Multi-level calibration” on page B-13 for more informa-
tion.
Calib Conc The amount, in mole percent, parts per million (ppm) or parts per billion
(ppb), of the component that is present in the calibration gas.
Unit Indicates the unit of measure used when calculating and displaying the
component’s calibration concentration. Options are Mole%, ppm and
ppb.