EL3000
CONTINUOUS GAS ANALYZERS | OI/EL3000-EN REV. D
141
10
Configuration
Measuring range switchover
Description
Two measuring ranges per measuring component are set up in
the gas analyzer.
The calibration always refers to both measuring ranges.
Limits of measuring ranges
The limits of the measuring ranges can be set by following the
rules applicable to the respective analyzer.
In addition, the following conditions apply for the combination
of measuring ranges.
Two initial measuring ranges
Figure 69: Two initial measuring ranges
• Measuring range 2 (MR2):
Initial measuring range
(≤
physical measuring range)
• Measuring range 1 (MR1):
Initial measuring range (≤
physical measuring range)
• Condition:
Measuring span MR1 ≤
measuring span MR2
One measuring range with suppressed zero point, one initial
measuring range
Figure 70: A measuring range with suppressed zero point, an initial measuring range
• Measuring range 2 (MR2):
Measurement ranges with suppressed zero point
• Measuring range 1 (MR1):
Initial measuring range
• Condition:
End value MR1 > Initial value MR2
Two measurement ranges with suppressed zero point
Figure 71: Two measuring ranges with suppressed zero point
• Measuring range 2 (MR2):
Measurement ranges with suppressed zero point
• Measuring range 1 (MR1):
Measurement ranges with suppressed zero point
• Conditions:
–
Start value MR1 ≤
Start value MR2
– End value MR1 > Initial value MR2
Note
Other measuring range combinations are not possible.
Measuring range switchover and feedback
There are three ways of executing the measuring range switch-
over:
• Manually on the gas analyzer,
• Automatic ‘Autorange’using correspondingly configured
switching thresholds,
• Externally controlled via appropriately configured digital
inputs (see
Configuration of inputs and outputs for
measuring range switchover and feedback
The measuring range feedback can be implemented via
appropriately configured digital outputs (see
inputs and outputs for measuring range switchover and
feedback
on page 143); it is independent of the selected type of
measuring range switchover.
The gas analyzer is factory-set to measuring range 2 and to
manual measuring range switchover.
