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Operating Instructions
Model 300E Carbon Monoxide Analyzer
Instruction Manual
68
P/N 04288 REV: A
6.4.5.
A1 & A2 Auto Range Mode
When the Auto Range mode is selected, the instrument reports the same data with
the same measurement span on both the
A1
and
A2
outputs, but automatically
switches both outputs back and forth between a user selected Low Range and a
user selected High Range depending on the level of the CO concentration. The unit
will move from Low Range to High Range when the CO
concentration exceeds to
98% of the Low Range span. The unit will return from High Range back to Low
Range once the CO
concentration falls below 75% of the Low Range span.
To set the ranges press following keystroke sequence:
SAMPLE
RANGE = 50.0 PPM
CO =
< TST TST > CAL
SETUP
SETUP C.3
CFG DAS
RNGE
PASS CLK MORE
EXIT
SETUP C.3
RANGE CONTROL MENU
MODE
SET UNIT
EXIT
SETUP C.3
RANGE MODE:
SNGL
SNGL DUAL
AUTO
ENTR EXIT
EXIT
Returns
to the Main
SAMPLE
Display
SETUP C.3
RANGE MODE:
AUTO
SNGL
DUAL AUTO
ENTR
EXIT
SETUP C.3
RANGE CONTROL MENU
MODE
SET
UNIT
EXIT
SETUP C.3
HIGH RANGE:
50.0 Conc
0 0
1
5 0 .0
ENTR
EXIT
SETUP C.3
LOW RANGE:
150.0 Conc
0 0
1
5 0 .0
ENTR
EXIT
SETUP C.3
RANGE CONTROL MENU
MODE
SET UNIT
EXIT
The Low and High
Ranges have separate
slopes and offsets for
computing the carbon
monoxide concentration.
The two ranges must be
independently calibrated.
Set the
LOW
and
HIGH
range value.
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