Parameter Description | Emerson Process Management 3-9000-745

MON20/20 Software for Gas Chromatographs	User Manual
SEPTEMBER 2010	3-9000-745

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-13for 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.

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3-9000-745 specifications

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Emerson Process Management 3-9000-745 manual Parameter Description

Models: 3-9000-745

MON20/20 Software for Gas Chromatographs

Parameter

Description

3-9000-745 specifications