November 2009

Process Analyzers

Fine tune accuracy in analytic measurement - Part 2

Follow these recommendations for correct analyzer calibration

Nordstrom, D., Waters, T., Swagelok Company

  In many analytical instrumentation systems, the analyzer does not provide an absolute measurement. Rather, it provides a relative response based on settings established during calibration, which is a critical process subject to significant error. To calibrate an analyzer, a calibration fluid of known contents and quantities is passed through the analyzer, producing measurements of component concentration. If these measurements are not consistent with the known quantities in the calibration fluid, the analyzer is adjusted accordingly. When the process samples are analyzed, the accuracy of the analyzer's reading will depend on the the calibration process accuracy. It is imperative to

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