Hello all, I'm a newbie of precision devices, so I'm don't know the usual calibration procedures. Near to me there is a guy that wants to sell a fluke 343. He offered also to connect it to it's fluke 8846, recently calibrated, to "calibrate" it. Probably he will connect the two fluke together and move the 343 pots to read the "correct values" on the 8846. Since my 7061 and 7075 aren't calibrated at all I'll use this as calibration for now. What can I expect connecting directly the 343 to these and calibrating them to the values indicated by it? I imagine that the 100 and 1000V ranges will load the 343 output very much, but it' will also be loaded by the 8846 from the original owner, so probably the error will mostly cancelled. What do you think? Thank you. Fabio. ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.

The Fluke 343 supports about a 20mA load and the 7075 has a 10MOhm input resistance when set to the 100 and 1000 volt input ranges yielding a worst case current draw of 0.1mA. At that level, the loading on the 343 is insignificant. On Thu, 12 Apr 2012 14:26:09 +0200, Fabio Eboli <FabioEb@quipo.it> wrote: >Hello all, I'm a newbie of precision devices, so >I'm don't know the usual calibration procedures. > >Near to me there is a guy that wants to sell a fluke >343. He offered also to connect it to it's fluke 8846, >recently calibrated, to "calibrate" it. > >Probably he will connect the two fluke >together and move the 343 pots to read the >"correct values" on the 8846. >Since my 7061 and 7075 aren't calibrated at all >I'll use this as calibration for now. >What can I expect connecting directly the 343 >to these and calibrating them to the values >indicated by it? > >I imagine that the 100 and 1000V ranges will load >the 343 output very much, but it' will also be loaded by >the 8846 from the original owner, so probably >the error will mostly cancelled. > >What do you think? >Thank you. >Fabio.

Don't let him adjust anything! Let him connect it to his meter and make a list of the readings. This will be much better than fiddling with adjustments he may not understand. You then have a list of errors thet you can compare with your meters. Robert G8RPI. ________________________________ From: Fabio Eboli <FabioEb@quipo.it> To: volt-nuts@febo.com Sent: Thursday, 12 April 2012, 13:26 Subject: [volt-nuts] Fluke 343 as transfer standard Hello all, I'm a newbie of precision devices, so I'm don't know the usual calibration procedures. Near to me there is a guy that wants to sell a fluke 343. He offered also to connect it to it's fluke 8846, recently calibrated, to "calibrate" it. Probably he will connect the two fluke together and move the 343 pots to read the "correct values" on the 8846. Since my 7061 and 7075 aren't calibrated at all I'll use this as calibration for now. What can I expect connecting directly the 343 to these and calibrating them to the values indicated by it? I imagine that the 100 and 1000V ranges will load the 343 output very much, but it' will also be loaded by the 8846 from the original owner, so probably the error will mostly cancelled. What do you think? Thank you. Fabio. ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. _______________________________________________ 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.

Robert, the 343 was "adjusted" before by him, so the original calibration is lost. I asked to not touch it, just write down the values he reads on his multimeter at multiple settings, and describe the calibration procedure he followed before, trying to undertand what points of the 343 were moved. Thanks, Fabio. Robert Atkinson <robert8rpi@yahoo.co.uk> ha scritto: > Don't let him adjust anything! Let him connect it to his meter and > make a list of the readings. This will be much better than fiddling > with adjustments he may not understand. You then have a list of > errors thet you can compare with your meters. > > Robert G8RPI. > > > > ________________________________ > From: Fabio Eboli <FabioEb@quipo.it> > To: volt-nuts@febo.com > Sent: Thursday, 12 April 2012, 13:26 > Subject: [volt-nuts] Fluke 343 as transfer standard > > Hello all, I'm a newbie of precision devices, so > I'm don't know the usual calibration procedures. > > Near to me there is a guy that wants to sell a fluke > 343. He offered also to connect it to it's fluke 8846, > recently calibrated, to "calibrate" it. > > Probably he will connect the two fluke > together and move the 343 pots to read the > "correct values" on the 8846. > Since my 7061 and 7075 aren't calibrated at all > I'll use this as calibration for now. > What can I expect connecting directly the 343 > to these and calibrating them to the values > indicated by it? > > I imagine that the 100 and 1000V ranges will load > the 343 output very much, but it' will also be loaded by > the 8846 from the original owner, so probably > the error will mostly cancelled. > > What do you think? > Thank you. > Fabio. > > ---------------------------------------------------------------- > This message was sent using IMP, the Internet Messaging Program. > > > > _______________________________________________ > 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. > ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.