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3-Newcomer
May 20, 2024
Solved

These units are not compatible

  • May 20, 2024
  • 2 replies
  • 2888 views

I tried to find a solution this but so far no results. This works in Smath as is, but now I'm trying to transform all my formulas to new software, Mathcad does not seem to like how it is calculated.

Can you tell me what I should do to make it work?

 

JK_11081130_0-1716204199132.png

 

lamda2*L2 can be calculated separatedly, but not within the formula..

 

Best answer by Werner_E

Your definition of lambda.2 in Prime has the wrong units!

It should be milliohm/meter but you defined it as millimeter * ohm / meter

 

miiliohm is not predefined in Prime. So you may write 10^-3 ohm.

If you need it more often in your sheet, it may be a good idea to add the definition of that unit by typing

Werner_E_0-1716208470618.png

You can hide that definition at the top of the sheet either to the right of the first page margin or in a collapsed region.
For consistency the left hand side of the definition should be labelled as "unit" (so its typeface is turned bold blue).

You get the Omega (looks better than writing "ohm") by typing a capital W and immediately follow it by pressing Ctrl-G (for "Greek").

 

For future questions please always attach your worksheet as well and as you are using Prime its necessary to state which version you are using.

2 replies

ttokoro
21-Topaz I
21-Topaz I
May 20, 2024

You need L:=value and unit.

t.t.
3-Newcomer
May 20, 2024

Thanks you spotted a mistake, it should be L2 also. I was so blind! But unfortunately it did not solve the problem.

12-Amethyst
May 20, 2024
In the brackets you need the same units to be added together
3-Newcomer
May 20, 2024

Can you please elaborate, I don't quite understand..

JK_11081130_0-1716206532713.png


This is how it looks like in Smath

Werner_E25-Diamond IAnswer
25-Diamond I
May 20, 2024

Your definition of lambda.2 in Prime has the wrong units!

It should be milliohm/meter but you defined it as millimeter * ohm / meter

 

miiliohm is not predefined in Prime. So you may write 10^-3 ohm.

If you need it more often in your sheet, it may be a good idea to add the definition of that unit by typing

Werner_E_0-1716208470618.png

You can hide that definition at the top of the sheet either to the right of the first page margin or in a collapsed region.
For consistency the left hand side of the definition should be labelled as "unit" (so its typeface is turned bold blue).

You get the Omega (looks better than writing "ohm") by typing a capital W and immediately follow it by pressing Ctrl-G (for "Greek").

 

For future questions please always attach your worksheet as well and as you are using Prime its necessary to state which version you are using.