Dual range mode (dual) – Teledyne GFC-7000E - Trace CO2 Analyzer User Manual

Page 71

Model GFC7000E Instruction Manual

Operating Instructions

04584 Rev A1

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

concentration.

The two ranges must be independently calibrated.