User's Manual

Basic Operation of the M400E Analyzer M400E Ozone Analyzer Operator’s Manual
6.4.4.5. RNGE  MODE  AUTO: Configuring the M400E analyzer for Auto Range
Mode
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 keystroke 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:SNGL
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
Toggled these keys 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
Avoid accidentally setting 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.
74 04315 Rev. C1