Mathcad error-This value has units:unitless, but must have unit: leght
Mathcad error-This value has units:unitless, but must have unit: leght
(OP)
Hi,
Attached is an equation in mathcad which seems to show an error. It is an equation from the DNV-RP-B401 code "Cathodic protection Design" - table 10-7 - Recommended Anode Resistance Formulae. The error is "This value has units: unitless, but must have unit: lenght." I have checked all the constants and they are all defined earlier with their respective units. Could someone help?
Thanks in advance.
Attached is an equation in mathcad which seems to show an error. It is an equation from the DNV-RP-B401 code "Cathodic protection Design" - table 10-7 - Recommended Anode Resistance Formulae. The error is "This value has units: unitless, but must have unit: lenght." I have checked all the constants and they are all defined earlier with their respective units. Could someone help?
Thanks in advance.





RE: Mathcad error-This value has units:unitless, but must have unit: leght
TTFN

FAQ731-376: Eng-Tips.com Forum Policies
RE: Mathcad error-This value has units:unitless, but must have unit: leght
RE: Mathcad error-This value has units:unitless, but must have unit: leght
RE: Mathcad error-This value has units:unitless, but must have unit: leght
For empirical equations (which this seems to be) I always do something like:
(ALI/ft+(r/ft / ALI/ft)^2)
and then it is just numbers added to numbers, it also lets me put the values in using any units that I want (MathCad has no trouble dividing mm by ft and canceling units).
David