Defining Units

Hi Andy,

What about this:

Andy:

I found the answer in a "how to" document somewhere here on the PTC site.  It's not well documented, but if you want an entirely new unit (for example petroleum barrels) you can do so by typing:

"bbls", <ctrl-u>, ":=", "158.987", "L"

which now defines "bbls" as a volumetric unit equal to 159 litres.

Once you've defined things as base units, you can create ratios (for example, I usually work in bbls/day not m3/s)

I put all of my "preferred" units into a separate worksheet which I "include" in my work-related sheets.  I enclose a copy of that worksheet.  Each of the units was defined using the name+<ctrl-u> syntax.  You'll note that for easy entry, I've defined some units like ft3 in terms of units directly in MathCad. I don't need to enter (ft*ft*ft) or use the shift key, I can just type ft3 and the application knows what I want.

You could probably define your unit as pspt (pounds sterling per tonne) and then you could enter your values, do all your calculations in SI and convert when necessary.

Bob