AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B 157
Limas11 IR, Limas21 UV, Limas21 HW, Uras26
Measurement ranges are freely selectable.
The Limas11 IR, Limas21 UV, Limas21 HW and Uras26 analyzer modules have
one physical measurement range per sample component. The limits of this
measurement range are determined by the minimum and the maximum
value of the product of the gas concentration and sample cell length (c × l)
min
or (c × l)
max
.
Up to four measurement ranges – within the limits of the physical measure-
ment range – can be ordered for each sample component. The maximum
ratio of the spans is 1:20. The measurement ranges can be starting meas-
urement ranges or suppressed measurement ranges.
If a calibration cell is provided for the measurement component, its set point
will always be at the upper end of the largest measurement range. When the
new measurement range is smaller than the old one the associated calibra-
tion cell may continue to be used.
In addition to the above measures, we recommend checking (see page 292)
the linearity of the new measurement range and measuring (see page 291)
the associated calibration cell after the range limits have been changed.
Oxygen sensor
Measurement range 1 is freely adjustable from 0 to 5 vol.% O
2
to
0 to 25 vol.% O
2
. Measurement range 2 is factory-set permanently to
0 to 25 vol.% O
2
.
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