[volt-nuts] (no subject)

[Tom Miller]

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 at zianet.com>
To: <volt-nuts at 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
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