Conversion problem

[landemarre]

Hello

I'm currently trying convert some flow plasma gas from Metco FMR to NLPM. I look in web site calculator, but I have a small problem, one of flow to translate is Nitrogen and flow is avaible for Helium secondary plasma gas flow tube! Can I use the Nitrogen primary plasma gas flow correction calculator for this translation?

Regards

Olivier

[landemarre]

(11-30-2009 10:03 AM)landemarre Wrote:  Hello

I'm currently trying convert some flow plasma gas from Metco FMR to NLPM. I look in web site calculator, but I have a small problem, one of flow to translate is Nitrogen and flow is avaible for Helium secondary plasma gas flow tube! Can I use the Nitrogen primary plasma gas flow correction calculator for this translation?

Regards

Olivier

I answer to myself.

I have seen in conversion formula, as primary gas and helium secondary gas are calibrated by nitrogen, use nitrogen converter should answer to my question.

Agree?

Olivier

[Gordon]

Hi Olivier

Yes as long as the helium flow tube is calibrated the same (nitrogen at 50 psi @ 70F). If you pass nitrogen at 50 psi and 70F the helium flow meter should give a direct read-out in SCFH for nitrogen. Use Nitrogen Primary Plasma Gas Flow Calculator if using different pressures or different flow units.

[landemarre]

Hello Gordon

Thanks a lot for your help.

Olivier

(12-01-2009 05:12 PM)Gordon Wrote:  Hi Olivier

Yes as long as the helium flow tube is calibrated the same (nitrogen at 50 psi @ 70F). If you pass nitrogen at 50 psi and 70F the helium flow meter should give a direct read-out in SCFH for nitrogen. Use Nitrogen Primary Plasma Gas Flow Calculator if using different pressures or different flow units.