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Two Ruska 2465's used to calibrate low pressure instruments in the draft range of pressure. The unit under test is a Ruska 7250LP +/-30 InH20 Pressure Controller. I am validating the repeatability of the system before it is sent to Fluke, Everett, WA. This testing is performed to verify that the system can be used at a different location with the same precision and provides measurement assurance.

Equation for Absolute by Vacuum Pressure. Expaned from P=F/A.

Paroscientific Quartz Resonant Pressure Transducer (Digiquartz)

Equation for Absolute with addition of atmospheric pressure. Expaned from P=F/A.