Teledyne GFC 7001EM operation manual Setup  More  Vars Internal Variables Vars, Off

Advanced Features Model GFC7001E Carbon Dioxide Analyzer

7.2.SETUP  MORE  VARS: INTERNAL VARIABLES (VARS)

The GFC 7001E/EM has several user-adjustable software variables, which define certain operational parameters. Usually, these variables are automatically set by the instrument’s firmware, but can be manually redefined using the VARS menu.

The following table lists all variables that are available within the 818 password protected level. See Appendix A-2 for a detailed listing of all of the GFC 7001E/EM variables that are accessible through the remote interface.

Table 7-4: Variable Names (VARS)

					ALLOWED	VARS
NO.		VARIABLE		DESCRIPTION		DEFAULT
					VALUES
						VALUES
				Changes the Internal Data Acquisition System (iDAS)	May be set for
				HOLDOFF timer.
					intervals
	0			No data is stored in the iDAS channels during situations
		DAS_HOLD_OFF			between	15 min.
				when the software considers the data to be questionable
					0.5 – 20 min
				such as during warm-up or just after the instrument returns
				from one of its calibration modes to SAMPLE Mode.
	1	CONC_PRECISION		Allows the user to set the number of significant digits to the	AUTO, 1, 2,	AUTO
				right of the decimal point display of concentration and stability
					3, 4
				values.
	2	DYN_ZERO 1		Dynamic zero automatically adjusts offset and slope of the		OFF
				CO response when performing a zero point calibration during	ON/OFF
				an AutoCal (see Section 9.4).
	3	DYN_SPAN 1		Dynamic span automatically adjusts the offsets and slopes of		OFF
				the CO response when performing a slope calibration during	ON/OFF
				an AutoCal (see Section 9.4).
	4	CLOCK_ADJ		Adjusts the speed of the analyzer’s clock. Choose the +	-60 to +60	0 sec
				sign if the clock is too slow, choose the - sign if the clock is
					s/day
				too fast.
	5	STABIL_GAS	2	Selects which gas measurement is displayed when the STABIL	CO; CO2 & O2	CO
				test function is selected.
1	Use of the DYN_ZERO and DYN_SPAN features are not allowed for applications requiring EPA equivalency.
2	This VARS only appears if either the optional O2 or CO2 sensors are installed.

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