7-A-6 Chapter 7: Gas Analyzer Configuration 42/24-10 EN Rev. 9
Auto-Range Initialization
Menu Path 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).
Lower Threshold,
Upper Threshold
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).
Assigned
Measurement Ranges
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.
Status Autoranging can be off or on.
Example
(see Figure 7-A-1)
Measurement Range 1: 0–100 ppm, Measurement Range 2: 0–200 ppm
Lower Threshold = 80 ppm = 40 % MR2, Upper Threshold = 90 ppm = 90 % MR1
Figure 7-A-1
Auto-Ranging
200 ppm
100 ppmMR1 0
MR2 0
U
er Threshold = 90
m = 90 % MR
Lower Threshold = 80 ppm = 40 % MR2
Parameter Range Action
Lower threshold 0…100% Set
Upper threshold 0…100% Set
Assigned ranges MR1, MR2, MR3, MR4 Select
Procedure
Status on or off Select
To Next Page
Loading...
