I just had a friend buy this for me (I don't have an ebay account). I hope I didn't make a mistake. http://www.ebay.com/itm/Electronic-Development-Corporation-EDC-VS330-VOLTAGE-STANDARD-/161069656213?nma=true&si=PiGtcBMSdSOxgbm9DhiZ6iLo1GQ%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557 Of course, once I have it, it's the chicken and egg problem. The best I have to check it against is an HP 3478A that was last calibrated an unknown number of years ago. It has a little round sticker over the CAL switch on the front, but no dated calibration label that I can see. It came from a repair facility that closed a few years ago. Actually, the reason I was tempted to buy the VS330 was because I think the 3478A is off a bit. A while back, I built a simple 5V reference with a MAX6350. The 3478A read high. I took the reference to work and the best Fluke handheld we have was dead on (I don't remember the model right now). I made the measurement again last night and the 3478A reads 5.0026 V, with the last digit fluctuating. Room temperature was 26 C. I guess obsessing about these things has brought me here to the Volt Nuts. I have been on Time Nuts for several years. Joe Gray W5JG

Can you get a service/calibration manual for it? I just sent my HP3457A out for calibration. $150 Tom ----- Original Message ----- From: "Joseph Gray" <jgray@zianet.com> To: <volt-nuts@febo.com> Sent: Sunday, July 28, 2013 5:05 PM Subject: [volt-nuts] (no subject) >I just had a friend buy this for me (I don't have an ebay account). I hope > I didn't make a mistake. > > http://www.ebay.com/itm/Electronic-Development-Corporation-EDC-VS330-VOLTAGE-STANDARD-/161069656213?nma=true&si=PiGtcBMSdSOxgbm9DhiZ6iLo1GQ%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557 > > Of course, once I have it, it's the chicken and egg problem. The best I > have to check it against is an HP 3478A that was last calibrated an > unknown > number of years ago. It has a little round sticker over the CAL switch on > the front, but no dated calibration label that I can see. It came from a > repair facility that closed a few years ago. > > Actually, the reason I was tempted to buy the VS330 was because I think > the > 3478A is off a bit. A while back, I built a simple 5V reference with a > MAX6350. The 3478A read high. I took the reference to work and the best > Fluke handheld we have was dead on (I don't remember the model right now). > > I made the measurement again last night and the 3478A reads 5.0026 V, with > the last digit fluctuating. Room temperature was 26 C. > > I guess obsessing about these things has brought me here to the Volt Nuts. > I have been on Time Nuts for several years. > > Joe Gray > W5JG > _______________________________________________ > 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.

I'm going to email K-H as J. L. Trantham suggested. Joe Gray W5JG On Sun, Jul 28, 2013 at 3:56 PM, Tom Miller <tmiller11147@verizon.net>wrote: > Can you get a service/calibration manual for it? > > I just sent my HP3457A out for calibration. $150 > > Tom > > ----- Original Message ----- From: "Joseph Gray" <jgray@zianet.com> > To: <volt-nuts@febo.com> > Sent: Sunday, July 28, 2013 5:05 PM > Subject: [volt-nuts] (no subject) > > > I just had a friend buy this for me (I don't have an ebay account). I hope >> I didn't make a mistake. >> >> http://www.ebay.com/itm/**Electronic-Development-** >> Corporation-EDC-VS330-VOLTAGE-**STANDARD-/161069656213?nma=**true&si=** >> PiGtcBMSdSOxgbm9DhiZ6iLo1GQ%**253D&orig_cvip=true&rt=nc&_** >> trksid=p2047675.l2557<http://www.ebay.com/itm/Electronic-Development-Corporation-EDC-VS330-VOLTAGE-STANDARD-/161069656213?nma=true&si=PiGtcBMSdSOxgbm9DhiZ6iLo1GQ%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557> >> >> Of course, once I have it, it's the chicken and egg problem. The best I >> have to check it against is an HP 3478A that was last calibrated an >> unknown >> number of years ago. It has a little round sticker over the CAL switch on >> the front, but no dated calibration label that I can see. It came from a >> repair facility that closed a few years ago. >> >> Actually, the reason I was tempted to buy the VS330 was because I think >> the >> 3478A is off a bit. A while back, I built a simple 5V reference with a >> MAX6350. The 3478A read high. I took the reference to work and the best >> Fluke handheld we have was dead on (I don't remember the model right now). >> >> I made the measurement again last night and the 3478A reads 5.0026 V, with >> the last digit fluctuating. Room temperature was 26 C. >> >> I guess obsessing about these things has brought me here to the Volt Nuts. >> I have been on Time Nuts for several years. >> >> Joe Gray >> W5JG >> ______________________________**_________________ >> volt-nuts mailing list -- volt-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/** >> mailman/listinfo/volt-nuts<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<https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts> > and follow the instructions there. > >

On 07/28/2013 04:56 PM, Tom Miller wrote: > Can you get a service/calibration manual for it? > > I just sent my HP3457A out for calibration. $150 Hi Tom, May I ask where you had this done? It seems like a reasonable charge. What documentation did they return with the unit? Thanks, (another 3457A owner (actually three)) -- Bob Smither, PhD Circuit Concepts, Inc. ========================================================================= Blessed is he who expects no gratitude, for he shall not be disappointed. -- W. C. Bennett ========================================================================= Smither@C-C-I.Com http://www.C-C-I.Com 281-331-2744(office) -4616(fax)