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PR2 is the pressure regulator for the purging system of the IR-cell and it is situated
inside the analyzer, just behind the left-side of the panel. It is positioned
horizontally.
– The oxygen pressure at the outlet of the PR2 should be 0.35 bar (5psi).
The pressure can be checked by applying a T-piece on the outlet of the pressure
regulator, and connecting a pressure gauge (1), as indicated above.
• Pull and rotate the knob of the pressure regulator (PR2), until the correct
pressure is shown on the gauge.