I express badly... It is only different models of clamp... you seems to have the Hall effect clamp, which measure DC and not to high frequency AC.
Essen seems to have used inductive clamp. Moreover it seems the PCE830 filter-out DC anyway, for current and voltage. I don't know why expensive instruments use "inductive" clamps instead. maybe to have better precision, bandwidth, calibration... Why the don't measure DC voltage is also not clear... 2013/6/26 Jed Rothwell <[email protected]> > Alain Sepeda <[email protected]> wrote: > > about Clamp and DC, there are 2 kind of clamp. >> > > There is only one clamp on my Radio Shack ammeter. > > I suppose it is not good for very low current. > > (I can't find it . . . I may have thrown it out or given it away, but > anyway there was only one clamp.) > > - Jed > >
