HP35s any good for EE?

[Csaba Tizedes]

(04-17-2015 09:09 AM)walter b Wrote:  

(04-17-2015 12:33 AM)emece67 Wrote:  ... it also works with units, a capability I really miss in RPN calculators.

Please, would you mind enlightening me why you need that?? TIA.

Background: On our side of the Atlantic Ocean, people use SI units. Doing so, you can throw in any such units (V, A, Ω, F, T, Cb, ...) in an equation and the result will be returned in the corresponding correct unit - as long as the equation is correct, of course.

d:-?

BTW emece67 has right.

I'm mechanical fluid flow and process engineer (we are designs pneumatic conveying systems for power plants). Many times I need to calculate from US/UK units to SI (because our sub-suppliers gives us some data sheet in "imperial" units).

Also in engineering the units has more meaning than they are: a simple example: the ventilator head in pascal is really joule/cubic meter, because 1_Pa = 1_J/m^3.
This means that work what the ventilator gives to the air when the air flows across on the ventilator (this work is drawn as function of flow rate and this is the characteristics curve of fan. Also the ducting has same characteristics curve with meaning of required work for that ducting in selected flow rate. Where the two curve intersect that point where the required work and fan work is equal and the system is operating.). Working with units is really important thing in engineering, not simple "if we calculating everything in SI, all results are SI also".

And of course the material properties or beam section tables: if you calculate 250_kN*m / 45_mm^3, you want to know the result is how many MPa. The unit conversion is very important in everyday work.

Csaba