Teledyne gfc 7000ta operation manual Dual Range Mode Dual, Range Control Menu

Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer

6.8.4. 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*	RANGE = 500.000 PPM	CO2 =X.XXX
< TST TST > CAL		SETUP

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 MODE: DUAL
SNGL DUAL AUTO		ENTR EXIT
SETUP X.X	RANGE CONTROL MENU
MODE SET UNIT		EXIT

SETUP X.X LOW RANGE: 500.0 Conc

0 0 1 0 0 .0 ENTR EXIT

SETUP X.X HIGH RANGE: 500.0 Conc

0	0	5	0	0	.0 ENTR	EXIT
SETUP X.X RANGE CONTROL MENU
MODE SET UNIT						EXIT

Toggle the numeral buttons to set the upper limit of each range.

EXIT Returns

to the Main

SAMPLE Display

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 CO2 concentration.

The two ranges must be independently calibrated.

Teledyne Analytical Instruments 93