AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B 291
Limas11 IR, Limas21 UV, Limas21 HW, Uras26: Measurement of
calibration cells
Definition
The measurement of a calibration cell in the Limas11 IR, Limas21 UV,
Limas21 HW and Uras26 analyzer modules means:
Determining what calibration cell "deflection" is equivalent to the calibration
reading with test gas. The "deflection" is stored as the "set point" of the
calibration cell.
When should calibration cells be measured?
We recommend measuring the calibration cells once a year.
We recommend measuring the calibration cells
• after end-point calibration of a sample component with test gas or
• after any change in measurement range limits or
• after a relinearization (see page 292).
Before measuring the calibration cells
Prior to measuring the calibration cells, the zero and end points of the ap-
plicable sample components must be calibrated with test gases.
Test gas
During calibration cell measurement the zero gas supply must be turned on.
Menu path
MENU → Maintenance/Test → Analyzer spec. adjustm. →
Measure cal.cell
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