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Oxygen analyser working, calibration of the analyser

Calibration:
a. SPAN Gas: - SPAN gas consists of 99.99% Nitrogen. As per it the O2 analyzer should show 0.01% oxygen
b. The analyzer is kept in fresh air where it should show 20.97% oxygen.



Working- principle of operation is that oxygen is paramagnetic a strongly attracted by magnetic field, and attraction varies with amount of oxygen.the dumbels are filled with nitrogen which diamagnetic. dumbell is kept in a magnetic field
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