I used a Fluke 5100B and 8920A for my SCAL calibration. I got lucky and it passed at Agilent. I think if you use a 3325A , you should get results that are close.
Todd Sent from my iPad > On May 20, 2015, at 15:46, Electronics and Books via volt-nuts > <volt-nuts@febo.com> wrote: > > It is stated that the ac calibration of a 3458 is so difficult. at least the > equipment mentioned is so difficult to obtain. but look what you need. a hp > signal generator 3325 where i have a pile of (any other good generator will > do to), an other hp 3458 and 3 different thermocouples. very expensive > nowhere to be found and very delicate. hp not procduced them for 40 years or > ballantine which cost more then the meter your calibrating. > but now for the accuracy. the signal generator has only 3 digits of amplitude > resolution. if you see the accuracy in the hp protocol what to measure it is > not possible to generate that. > and for the thermocouples. they give only millivolts. you need an other 3458 > with no offset or better a nanovolt meter to measure them. > a far easier solution is a hp powersensor 8482a on a hp power meter. it is a > thermocouple of the correct frequency range and can be measured accurate > enough for the generator. > the ac calibation is not an exact value as the volt or resistor but only a > deviation in the frequency range. it is even difficult to obtain the > deviation in 3 digits. > ok it took me an hour but then i was done. > > > Regards > > Frans > > > i...@electronicsandbooks.com > Netherlands > > Discere ne cesses > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
