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Model GFC7000E Instruction Manual Operating Instructions
04584 Rev A1 64
6.8. SETUP – VARS: Using the Internal Variables
The MGFC7000E 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 re-defined using the VARS menu. Table 6-6 lists all variables that are available within
the 818 password protected level.
Table 6-6: Variable Names (VARS) Revision B.3
No. Variable Description Allowed Values
0 DAS_HOLD_OFF
Changes the internal data acquisition system (iDAS)
hold-off time, which is the duration when data are
not stored in the iDAS because the software
considers the data to be questionable. That is the
case during warm-up or just after the instrument
returns from one of its calibration modes to SAMPLE
mode. DAS_HOLD_OFF can be disabled entirely in
each iDAS channel.
Can be between
0.5 and 20
minutes
Default=15 min.
1 CONC_PRECISION
Allows the user to set the number of
significant digits
to the right of the decimal point display of
concentration and stability values.
AUTO, 1, 2, 3, 4
Default=AUTO
2 DYN_ZERO
Dynamic zero automatically adjusts offset and slope
of the CO
2
response when performing a zero point
calibration during an AutoCal (Chapter 7).
ON/OFF
3 DYN_SPAN
Dynamic span automatically adjusts slope and slope
of the CO
2
response when performing a zero point
calibration during an AutoCal (Chapter 7).
Note that the DYN_ZERO and DYN_SPAN features
are not allowed for applications requiring EPA
equivalency.
ON/OFF
4 CLOCK_ADJ
Adjusts the speed of the analyzer’s clock. Choose the
+ sign if the clock is too slow, choose the - sign if
the clock is too fast.
-60 to +60 s/day