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AO2000
CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
161
Auto-ranging parameterization
Menu path
MENU
→
Configure
→
Component-Specific
→
Autorange
→
Select Component
→
...
NOTE
The automatic measurement range changeover (auto-ranging) only func-
tions properly when the measurement ranges MR1, MR2, … have been con-
figured (see page 156) in ascending order, i.e. MR1 < MR2 < ….
Lower threshold, upper threshold
On reaching the lower threshold value set here (as a percentage of the cur-
rent measurement range scale), the analyzer module automatically switches
to the next lower range.
On reaching the upper threshold value set here (as a percentage of the cur-
rent measurement range scale), the analyzer module automatically switches
to the next higher range.
NOTE
The lower and upper threshold values should be selected so that the gas
analyzer is not constantly switching between two measurement ranges (see
the example below).
Assigned ranges
Parameters can be set for measurement ranges to be included for auto-
ranging can be initialized. The number of measurement ranges available
depends on the analyzer module.
NOTE
The parameter cannot be selected if the analyzer module has only two
measurement ranges since these are automatically included in the au-
to-ranging function.
Status
Auto-ranging can be off or on.
Example for auto-ranging
Measurement range 1: 0 to 100 ppm, measurement range 2: 0 to 200 ppm
Lower threshold = 80 ppm = 40 % MR2, upper threshold = 90 ppm =
90 % MR1
200 ppm
100 ppm
MR1 0
MR2 0
Upper Threshold = 90 ppm = 90 % MR1
Lower Threshold = 80 ppm = 40 % MR2
Procedure
Parameter Range
Action
Lower threshold
0 to 100%
Set
Upper threshold
0 to 100%
Set
Assigned ranges
MR1, MR2, MR3, MR4
Select
Status
on or off
Select