T400 Ozone Analyzer Operator’s Manual Setup Menu
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5.4.1.5. RNGE MODE AUTO: Auto Range Mode Configuration
AUTO range mode gives the analyzer to ability to output data via a LOW range
(displayed on the front panel as RANGE1) and HIGH range (displayed on the front
panel as RANGE2) on a single analog output.
When the AUTO range mode is selected, the analyzer automatically switches back and
forth between user selected LOW & HIGH ranges depending on the level of the O
3
concentration.
The unit will move from LOW range to HIGH range when the O
3
concentration
exceeds to 98% of the LOW range span limit.
The unit will return from HIGH range back to LOW range once the O
3
concentration
falls below 75% of the LOW range span limit.
To set the ranges press following button stroke sequence:
SETUP X.X PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT
SAMPLE RANGE=500.0 PPB O3= XXXX
<TST TST> CAL SETUP
SETUP X.X RANGE MODE MENU
MODE SET UNIT EXIT
SETUP X.X RANGE MODE:AUTO
SNGL DUAL AUTO ENTR EXIT
SETUP X.X RANGE MODE:SNGL
SNGL DUAL AUTO ENTR EXIT
SETUP X.X RANGE MODE MENU
MODE SET UNIT EXIT
SETUP X.X HIGH RANGE:200.0 Conc
00200.0ENTREXIT
Toggle buttons to
select the upper
SPAN limit for the
reporting range
EXIT discards the new
setting
ENTR accepts the
new setting
SETUP X.X LOW RANGE:50.0 Conc
00050.0ENTREXIT
The LOW and HIGH
ranges have separate
slopes and offsets for
computing the O
3
concentration.
The two ranges must
be independently
calibrated
.
EXIT discards the
new setting
ENTR accepts the
new setting
Note
Do not set the LOW range (RANGE1) of the instrument with a higher span limit
than the HIGH range (RANGE2). This will cause the unit to stay in the low reporting
range perpetually and defeat the function of the AUTO range mode.
