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Auto-Range Initialization
Menu Path
Lower Threshold,
Upper Threshold
Assigned
Measurement Ranges
Status
Example
(see Figure 7-A-1)
Figure 7-A-1
Auto-Ranging
Procedure
7-A-6
MENU → Configure → Component specific → Autorange →
Select component → ...
The automatic measurement range changeover only functions properly when the
measurement ranges MB1, MB2, ... have been configured in ascending order, i.e.
MB1 < MB2 < ... (see page 7-A-2).
On reaching the lower threshold value set here (as a percentage of the current
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 current
measurement range scale), the analyzer module automatically switches to the
next higher range.
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).
The measurement ranges to be included for autoranging can be initialized. The
number of measurement ranges available depends on the analyzer module.
The parameter cannot be selected if the analyzer module has only two measure-
ment ranges since these are automatically included in the autoranging function.
Autoranging can be off or on.
Measurement Range 1: 0–100 ppm, Measurement Range 2: 0–200 ppm
Lower Threshold = 80 ppm = 40 % MR2, Upper Threshold = 90 ppm = 90 % MR1
Lower Threshold = 80 ppm = 40 % MR2
MR2 0
MR1 0
Upper Threshold = 90 ppm = 90 % MR1
Parameter
Lower threshold
Upper threshold
Assigned ranges
Status
Chapter 7: Gas Analyzer Configuration
100 ppm
Range
0...100%
0...100%
MR1, MR2, MR3, MR4
on or off
200 ppm
Action
Set
Set
Select
Select
42/24-10 EN Rev. 9
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