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Re: [volt-nuts] volt-nuts Digest, Vol 57, Issue 15

joesmith@cvctx.com

Sat, May 31, 2014 4:36 PM

WOW,, I would take a LOT of pride in owning such a difinative piece of
hardware!

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Today's Topics:

Voltmeter calibration (Bob Albert)

Message: 1
Date: Fri, 30 May 2014 22:15:08 -0700 (PDT)
From: Bob Albert bob91343@yahoo.com
To: "volt-nuts@febo.com" volt-nuts@febo.com
Subject: [volt-nuts] Voltmeter calibration
Message-ID:
1401513308.7302.YahooMailNeo@web122605.mail.ne1.yahoo.com
Content-Type: text/plain; charset=iso-8859-1

I recently acquired an HP 3456A which has a tighter specification
than the EI.? It's also a couple of decades newer and has been
calibrated.

So I took a deep breath and opened the EI looking for a calibration
adjustment.? I found one, and tweaked it to bring the EI back into
specification.? It was off by about 0.06% and now it's within its
spec of 0.01%.

Pretty good gear, to hold its calibration so well for about a half
century!? And now it has a new lease, with its recalibration.

I also monitored the EI to see what its warmup time is.? It settled
very closely within about 15 minutes from a cold start.? And I mean
cold; I hadn't switched it on for quite a while.? (There is a 55C
oven in it, holding the reference temp constant.)

Of course I don't need this unit any more but it's quaint and works
great.? It's not all that much bigger than the HP but lacks the
resistance measurement and a few other bells and whistles.? And the
big Nixie tube readout is cool.

Bob

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End of volt-nuts Digest, Vol 57, Issue 15

WOW,, I would take a LOT of pride in owning such a difinative piece of hardware! On Sat, 31 May 2014 12:00:01 -0400, volt-nuts-request@febo.com wrote: Send volt-nuts mailing list submissions to > volt-nuts@febo.com > > To subscribe or unsubscribe via the World Wide Web, visit > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > or, via email, send a message with subject or body 'help' to > volt-nuts-request@febo.com > > You can reach the person managing the list at > volt-nuts-owner@febo.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of volt-nuts digest..." > > > Today's Topics: > > 1. Voltmeter calibration (Bob Albert) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 30 May 2014 22:15:08 -0700 (PDT) > From: Bob Albert <bob91343@yahoo.com> > To: "volt-nuts@febo.com" <volt-nuts@febo.com> > Subject: [volt-nuts] Voltmeter calibration > Message-ID: > <1401513308.7302.YahooMailNeo@web122605.mail.ne1.yahoo.com> > Content-Type: text/plain; charset=iso-8859-1 > > I recently acquired an HP 3456A which has a tighter specification > than the EI.? It's also a couple of decades newer and has been > calibrated. > > > So I took a deep breath and opened the EI looking for a calibration > adjustment.? I found one, and tweaked it to bring the EI back into > specification.? It was off by about 0.06% and now it's within its > spec of 0.01%. > > Pretty good gear, to hold its calibration so well for about a half > century!? And now it has a new lease, with its recalibration. > > I also monitored the EI to see what its warmup time is.? It settled > very closely within about 15 minutes from a cold start.? And I mean > cold; I hadn't switched it on for quite a while.? (There is a 55C > oven in it, holding the reference temp constant.) > > Of course I don't need this unit any more but it's quaint and works > great.? It's not all that much bigger than the HP but lacks the > resistance measurement and a few other bells and whistles.? And the > big Nixie tube readout is cool. > > > Bob > > > ------------------------------ > > _______________________________________________ > volt-nuts mailing list > volt-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > End of volt-nuts Digest, Vol 57, Issue 15 > ***************************************** > >

Bob Albert

Sat, May 31, 2014 6:09 PM

Well I do have pride in owning this machine but it's redundant to my needs. I have far too much test equipment (and other stuff) and need to downsize.

Bob

On Saturday, May 31, 2014 10:01 AM, "joesmith@cvctx.com" joesmith@cvctx.com wrote:

WOW,, I would take a LOT of pride in owning such a difinative piece of
hardware!

On Sat, 31 May 2014 12:00:01 -0400, volt-nuts-request@febo.com wrote:
Send volt-nuts mailing list submissions to

volt-nuts@febo.com

You can reach the person managing the list at
volt-nuts-owner@febo.com

When replying, please edit your Subject line so it is more specific
than "Re: Contents of volt-nuts digest..."

Today's Topics:

Voltmeter calibration (Bob Albert)

I recently acquired an HP 3456A which has a tighter specification
than the EI.? It's also a couple of decades newer and has been
calibrated.

Pretty good gear, to hold its calibration so well for about a half
century!? And now it has a new lease, with its recalibration.

Bob

volt-nuts mailing list
volt-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts

End of volt-nuts Digest, Vol 57, Issue 15

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Well I do have pride in owning this machine but it's redundant to my needs. I have far too much test equipment (and other stuff) and need to downsize. Bob On Saturday, May 31, 2014 10:01 AM, "joesmith@cvctx.com" <joesmith@cvctx.com> wrote: WOW,, I would take a LOT of pride in owning such a difinative piece of hardware! On Sat, 31 May 2014 12:00:01 -0400, volt-nuts-request@febo.com wrote: Send volt-nuts mailing list submissions to > volt-nuts@febo.com > > To subscribe or unsubscribe via the World Wide Web, visit > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > or, via email, send a message with subject or body 'help' to > volt-nuts-request@febo.com > > You can reach the person managing the list at > volt-nuts-owner@febo.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of volt-nuts digest..." > > > Today's Topics: > > 1. Voltmeter calibration (Bob Albert) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 30 May 2014 22:15:08 -0700 (PDT) > From: Bob Albert <bob91343@yahoo.com> > To: "volt-nuts@febo.com" <volt-nuts@febo.com> > Subject: [volt-nuts] Voltmeter calibration > Message-ID: > <1401513308.7302.YahooMailNeo@web122605.mail.ne1.yahoo.com> > Content-Type: text/plain; charset=iso-8859-1 > > I recently acquired an HP 3456A which has a tighter specification > than the EI.? It's also a couple of decades newer and has been > calibrated. > > > So I took a deep breath and opened the EI looking for a calibration > adjustment.? I found one, and tweaked it to bring the EI back into > specification.? It was off by about 0.06% and now it's within its > spec of 0.01%. > > Pretty good gear, to hold its calibration so well for about a half > century!? And now it has a new lease, with its recalibration. > > I also monitored the EI to see what its warmup time is.? It settled > very closely within about 15 minutes from a cold start.? And I mean > cold; I hadn't switched it on for quite a while.? (There is a 55C > oven in it, holding the reference temp constant.) > > Of course I don't need this unit any more but it's quaint and works > great.? It's not all that much bigger than the HP but lacks the > resistance measurement and a few other bells and whistles.? And the > big Nixie tube readout is cool. > > > Bob > > > ------------------------------ > > _______________________________________________ > volt-nuts mailing list > volt-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > End of volt-nuts Digest, Vol 57, Issue 15 > ***************************************** > > _______________________________________________ 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.