[volt-nuts] EDC VS330 Voltage Standard

[Joseph Gray]

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 <jltran at 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 sales at 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-bounces at febo.com [mailto:volt-nuts-bounces at febo.com] On
> Behalf Of Joseph Gray
> Sent: Sunday, July 28, 2013 4:06 PM
> To: volt-nuts at 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
>
> 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
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