Unit of Measure Conversion Problem
Unit of Measure Conversion Problem
(OP)
Hey guys,
I don't know why I'm having such a hard time cancelling out units here, but here's my predicament. We send out a couple materials to have some MVTR (Moisture Vapor Transmission Rate) testing done to see the permeability of each film. The units we got back were in g/Pa*s*m^2. I have a data sheet for another material that we're looking to switch to and that one has units in g/m^2*D. I'm trying to cancel the units out, but not having luck! I think it's been too long since I've done this stuff.
Do any of you have any insight on this?
Thanks so much!
I don't know why I'm having such a hard time cancelling out units here, but here's my predicament. We send out a couple materials to have some MVTR (Moisture Vapor Transmission Rate) testing done to see the permeability of each film. The units we got back were in g/Pa*s*m^2. I have a data sheet for another material that we're looking to switch to and that one has units in g/m^2*D. I'm trying to cancel the units out, but not having luck! I think it's been too long since I've done this stuff.
Do any of you have any insight on this?
Thanks so much!





RE: Unit of Measure Conversion Problem
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RE: Unit of Measure Conversion Problem
The units are not equivalent. according to wikipedia, the first is permeance, which WVTR/pressure difference, which, presumably, is a way of describing the WVTR with some indication of how much pressure is required to achieve a certain level of WVTR
TTFN

FAQ731-376: Eng-Tips.com Forum Policies
Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers
Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
RE: Unit of Measure Conversion Problem
Thanks so much for the input, though!