Volume / Pressure Conversion

All,

I know this is not necessarily PCDMIS related but it is job related.

The note on the print says:

Max leakage at 5.5 bar: 5 cubic mm per second at atmospheric pressure.

I have a tester that can input 80 psi and I can measure the drop in pressure. For instance I can watch for 1 min and see that it drops to 70psi. Is there a way to convert this into something I can use to satisfy the print callout? Any help would be greatly appreciated.

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jhingle over 13 years ago

Yes, that is correct. That is why you have to use the ideal gas law to find the difference in molar mass of the chamber air. Using this difference the only now is the volume of the evacuated air which you would then use atmospheric state variables to calculate along with the "missing" molar mass from the chamber. Divide this volume by time and you have your volumetric flow rate.
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jhingle over 13 years ago

Yes, that is correct. That is why you have to use the ideal gas law to find the difference in molar mass of the chamber air. Using this difference the only now is the volume of the evacuated air which you would then use atmospheric state variables to calculate along with the "missing" molar mass from the chamber. Divide this volume by time and you have your volumetric flow rate.
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