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 [email protected] 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: [email protected] [mailto:[email protected]] On Behalf Of Joseph Gray Sent: Sunday, July 28, 2013 4:06 PM To: [email protected] 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 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 -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
