Same issue as with the time-nuts and the man with one watch versus more. No way to tell except to 'vote with the majority'.
So, the answer is 'probably'. Joe -----Original Message----- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Joseph Gray Sent: Sunday, July 28, 2013 6:37 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] EDC VS330 Voltage Standard When I get the VS330, I think I'll first try setting it for 5 V and comparing the 3478A reading with what I got with the MAX6350. If I get about the same reading of 5.0026 V, is it safe to assume that the 3478A is in error? Joe Gray W5JG On Sun, Jul 28, 2013 at 5:02 PM, Joseph Gray <jg...@zianet.com> wrote: > Thanks for the subject. Actually, I had intended to put that exact > subject on it, but forgot and clicked send. > > I couldn't find even a partial manual for the VS330, but the 1030A > partial manual looks like it would be very similar. Would you please > send me the email contact at K-H that sent you the manual? > > Joe Gray > W5JG > > > > On Sun, Jul 28, 2013 at 4:11 PM, J. L. Trantham <jlt...@att.net> wrote: > >> Joe, >> >> Pardon my adding a 'subject' to the thread. >> >> If all you want is a 'house standard', you're probably 'in the ball park'. >> If you want to set up a home 'metrology lab' (careful, this 'metrology' >> stuff can be as addicting as the 'time' stuff), you should get >> something calibrated by an outside lab. I would send the highest >> resolution meter out for cal. I don't know if calibration services >> are available for the VS330. >> >> If the 3478A is it, I would vote to send the 3478A to Agilent for >> their 'Agilent' cal ($204.22 per their website) and see where you >> are. The meters I have sent to Agilent for their 'Agilent' cal, come >> back with 'as found' >> and 'as left' values and is very informative about the capabilities >> of the meters. The meters I have returned for a repeat 'Agilent' cal >> have all returned with their 'as found' values still in cal. >> >> Once you get the 3478A back, you will have a number of 'calibrated' >> measurement capabilities. >> >> Do you have a manual? I have an EDC CR103 voltage and current >> standard and was able to find a 'partial' manual on the web. It >> noted that a complete manual was available from Krohn-Hite and to >> contact them at (508) >> 508-1660 >> or sa...@krohn-hite.com to purchase a complete manual. When I >> emailed them about obtaining one, I received a complete .PDF manual >> by return email from one of their service engineers. Others have had >> a similar experience. >> When >> asked, Krohn-Hite asked that the manuals not be 'shared'. So, if you >> can't find one, you might try contacting them. >> >> Good luck. >> >> Joe >> >> >> >> -----Original Message----- >> From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] >> On Behalf Of Joseph Gray >> Sent: Sunday, July 28, 2013 4:06 PM >> To: volt-nuts@febo.com >> 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_cv >> ip=true&rt=nc&_trksid=p2047675.l2557<http://www.ebay.com/itm/Electron >> ic-Development-Corporation-EDC-VS330-VOLTAGE-STANDARD-/161069656213?n >> ma=true&si=PiGtcBMSdSOxgbm9DhiZ6iLo1GQ%253D&orig_cvip=true&rt=nc&_trk >> sid=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. >> >> _______________________________________________ >> 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. _______________________________________________ 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.