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Model GFC7000E Instruction Manual Operating Instructions
04584 Rev A1 60
6.7.4. Dual Range Mode (DUAL)
Selecting Dual Range mode allows the A1 and A2 outputs to be configured with different
reporting ranges. The analyzer software calls these two ranges low and high. The low range
setting corresponds with the analog output labeled A1 on the Rear Panel of the instrument. The
high Range Setting corresponds with the A2 output. While the software names these two ranges
low and high, they do not have to be configured that way. For example: The low range can be set
for a span of 0-1000 ppm while the high range is set for 0-500 ppm.
In DUAL range mode the RANGE test function displayed on the front panel will be replaced by
two separate functions:
• RANGE1: The range setting for the A1 output.
• RANGE2: The range setting for the A2 output.
To set the ranges press following keystroke sequence
.
SAMPLE ENTER SETUP PASS : 818
8 1 8
ENTR
EXIT
SETUP X.X
PRIMARY SETUP MENU
CFG DAS
RNGE
PASS CLK MORE EXIT
SETUP X.X RANGE CONTROL MENU
MODE
SET UNIT
EXIT
SETUP X.X RANGE MODE:
SNGL
SNGL
DUAL
AUTO ENTR EXIT
SETUP X.X
RANGE CONTROL MENU
MODE
SET
UNIT
EXIT
SETUP X.X
HIGH RANGE: 500.0 Conc
0 0 5 0 0 .0 ENTR EXIT
SETUP X.X LOW RANGE: 500.0 Conc
0 0 1 0 0 .0 ENTR EXIT
SETUP X.X RANGE CONTROL MENU
MODE SET UNIT EXIT
EXIT
Returns
to the Main
SAMPLE Display
SETUP X.X RANGE MODE:
DUAL
SNGL DUAL AUTO ENTR EXIT
Toggle the
Numeral Keys
to set the upper
limit of each
range.
SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX
< TST TST > CAL
SETUP
When the instrument’s range mode is set to DUAL the concentration field in the upper right hand
corner of the display alternates between displaying the low range value and the high range value.
The concentration currently being displayed is identified as follows: C1 = Low (or A1) and C2 =
High (or A2).
NOTE
In DUAL range mode the LOW and HIGH ranges have separate slopes and offsets for
computing CO
2
concentration.
The two ranges must be independently calibrated.