L : equivalent standard leak rate atm·cc/s mbar·l/s Pa·cm³/s atm·mol/s air helium nitrogen oxygen argon

V : internal volume of the device package cavity cc - cm³ mm³ µl

Pₑ : pressure of exposure atm psi bar absolute

t₁ : time of exposure to Pₑ s min h

t₂ : dwell time between release of pressure and leak detection s min h

Reverse Calculation

If R is measured at atm·cc/s mbar·l/s Pa·cm³/s atm·mol/s helium air nitrogen oxygen argon then L= atm·cc/s mbar·l/s Pa·cm³/s atm·mol/s air helium nitrogen oxygen argon

DISCLAIMER : Please contact Oneida Research Services, Inc. at (315) 736-5480 or Daniel Rossiter by email at djrossiter@orslabs.com for technical discussions regarding the application of the Howell-Mann equation.

1-aug-2016 v1.2