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Discussion of precise voltage measurement

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Re: [volt-nuts] HP 3458A DC current accuracy

A
Artekmedia
Fri, Jul 13, 2012 3:49 PM

There are 1,209,600 seconds in a fortnight (14days/fortnight x 24
hours/day x 60 min/hour x 60 seconds/min) so the implied error is a bit
less than 1PPM.

Dave

"Experience keeps a dear school ..but a fool learns in no other" ..Ben
Franklin

On 7/13/2012 8:09 AM, Steve wrote:

But what if a leap second occurs during the fortnight the standard is being set? ;)

Steve

On Jul 13, 2012, at 7:22 AM, "Poul-Henning Kamp"phk@phk.freebsd.dk  wrote:

In message4FFFEBEC.8030802@embarqmail.com, Artekmedia writes:

Yes, I'd expect the last non-metric country in the world to go for that :-)

Coulombs per fortnight to be sure :-)

On 7/13/2012 2:40 AM, Poul-Henning Kamp wrote:

No practical quantum Ampere so far?

It has always surprised me that the Ampere was not defined in terms of
electron charges per second...

--
Dave&  Lynn Henderson
Manuals@ArtekMedia.com
www.Artekmedia.com
PO Box 175
Welch,MN 55089


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--
Poul-Henning Kamp      | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG        | TCP/IP since RFC 956
FreeBSD committer      | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.


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--
Dave&  Lynn Henderson
Manuals@ArtekMedia.com
www.Artekmedia.com
PO Box 175
Welch,MN 55089

There are 1,209,600 seconds in a fortnight (14days/fortnight x 24 hours/day x 60 min/hour x 60 seconds/min) so the implied error is a bit less than 1PPM. Dave "Experience keeps a dear school ..but a fool learns in no other" ..Ben Franklin On 7/13/2012 8:09 AM, Steve wrote: > But what if a leap second occurs during the fortnight the standard is being set? ;) > > Steve > > > > On Jul 13, 2012, at 7:22 AM, "Poul-Henning Kamp"<phk@phk.freebsd.dk> wrote: > >> In message<4FFFEBEC.8030802@embarqmail.com>, Artekmedia writes: >> >> Yes, I'd expect the last non-metric country in the world to go for that :-) >> >>> Coulombs per fortnight to be sure :-) >>> >>> On 7/13/2012 2:40 AM, Poul-Henning Kamp wrote: >>>> In message<CAE6XXrjKES2=BPCNyzOcbXFM73+4ztOTAkUEcTTaqTsDuvrJGw@mail.gmail.com> >>>> , Will writes: >>>> >>>>> No practical quantum Ampere so far? >>>> It has always surprised me that the Ampere was not defined in terms of >>>> electron charges per second... >>>> >>> -- >>> Dave& Lynn Henderson >>> Manuals@ArtekMedia.com >>> www.Artekmedia.com >>> PO Box 175 >>> Welch,MN 55089 >>> >>> >>> _______________________________________________ >>> 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. >>> >> -- >> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 >> phk@FreeBSD.ORG | TCP/IP since RFC 956 >> FreeBSD committer | BSD since 4.3-tahoe >> Never attribute to malice what can adequately be explained by incompetence. >> >> _______________________________________________ >> 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. > -- Dave& Lynn Henderson Manuals@ArtekMedia.com www.Artekmedia.com PO Box 175 Welch,MN 55089
A
Artekmedia
Fri, Jul 13, 2012 4:23 PM

Actually it is pretty easy to avoid leap seconds as they are usually
introduced on June 30 or Dec 31 and only 25 leap seconds have been
introduced in the last 40 years, the most recent one on June 30th,
2012...given that figure,  the implied error due to leap seconds is much
much less than the simple example below.

Dave
Now my head is beginning to hurt as I ponder the reasons why man exists
and the statistical probability of sentiment life in the rest of the
universe.  I am now going to find a beer and kill off a few of my 1.2 x
10^11 brain cells..hopefully I will get the ones that care about this
stuff at all.

On 7/13/2012 10:49 AM, Artekmedia wrote:

There are 1,209,600 seconds in a fortnight (14days/fortnight x 24
hours/day x 60 min/hour x 60 seconds/min) so the implied error is a
bit less than 1PPM.

Dave

"Experience keeps a dear school ..but a fool learns in no other" ..Ben
Franklin

On 7/13/2012 8:09 AM, Steve wrote:

But what if a leap second occurs during the fortnight the standard is
being set? ;)

Steve

On Jul 13, 2012, at 7:22 AM, "Poul-Henning Kamp"phk@phk.freebsd.dk
wrote:

In message4FFFEBEC.8030802@embarqmail.com, Artekmedia writes:

Yes, I'd expect the last non-metric country in the world to go for
that :-)

Coulombs per fortnight to be sure :-)

On 7/13/2012 2:40 AM, Poul-Henning Kamp wrote:

No practical quantum Ampere so far?

It has always surprised me that the Ampere was not defined in
terms of
electron charges per second...

--
Dave&  Lynn Henderson
Manuals@ArtekMedia.com
www.Artekmedia.com
PO Box 175
Welch,MN 55089


volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
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--
Poul-Henning Kamp      | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG        | TCP/IP since RFC 956
FreeBSD committer      | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by
incompetence.


volt-nuts mailing list -- volt-nuts@febo.com
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volt-nuts mailing list -- volt-nuts@febo.com
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and follow the instructions there.

--
Dave&  Lynn Henderson
Manuals@ArtekMedia.com
www.Artekmedia.com
PO Box 175
Welch,MN 55089

Actually it is pretty easy to avoid leap seconds as they are usually introduced on June 30 or Dec 31 and only 25 leap seconds have been introduced in the last 40 years, the most recent one on June 30th, 2012...given that figure, the implied error due to leap seconds is much much less than the simple example below. Dave Now my head is beginning to hurt as I ponder the reasons why man exists and the statistical probability of sentiment life in the rest of the universe. I am now going to find a beer and kill off a few of my 1.2 x 10^11 brain cells..hopefully I will get the ones that care about this stuff at all. On 7/13/2012 10:49 AM, Artekmedia wrote: > There are 1,209,600 seconds in a fortnight (14days/fortnight x 24 > hours/day x 60 min/hour x 60 seconds/min) so the implied error is a > bit less than 1PPM. > > > Dave > > "Experience keeps a dear school ..but a fool learns in no other" ..Ben > Franklin > > > On 7/13/2012 8:09 AM, Steve wrote: >> But what if a leap second occurs during the fortnight the standard is >> being set? ;) >> >> Steve >> >> >> >> On Jul 13, 2012, at 7:22 AM, "Poul-Henning Kamp"<phk@phk.freebsd.dk> >> wrote: >> >>> In message<4FFFEBEC.8030802@embarqmail.com>, Artekmedia writes: >>> >>> Yes, I'd expect the last non-metric country in the world to go for >>> that :-) >>> >>>> Coulombs per fortnight to be sure :-) >>>> >>>> On 7/13/2012 2:40 AM, Poul-Henning Kamp wrote: >>>>> In >>>>> message<CAE6XXrjKES2=BPCNyzOcbXFM73+4ztOTAkUEcTTaqTsDuvrJGw@mail.gmail.com> >>>>> , Will writes: >>>>> >>>>>> No practical quantum Ampere so far? >>>>> It has always surprised me that the Ampere was not defined in >>>>> terms of >>>>> electron charges per second... >>>>> >>>> -- >>>> Dave& Lynn Henderson >>>> Manuals@ArtekMedia.com >>>> www.Artekmedia.com >>>> PO Box 175 >>>> Welch,MN 55089 >>>> >>>> >>>> _______________________________________________ >>>> 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. >>>> >>> -- >>> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 >>> phk@FreeBSD.ORG | TCP/IP since RFC 956 >>> FreeBSD committer | BSD since 4.3-tahoe >>> Never attribute to malice what can adequately be explained by >>> incompetence. >>> >>> _______________________________________________ >>> 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. >> > -- Dave& Lynn Henderson Manuals@ArtekMedia.com www.Artekmedia.com PO Box 175 Welch,MN 55089
S
Steve
Fri, Jul 13, 2012 4:34 PM

I wouldn't lose any sleep over it, but maybe I'm not "nutty" enough for the current discussion :-o

Steve

On Jul 13, 2012, at 10:49 AM, Artekmedia henderson47@embarqmail.com wrote:

There are 1,209,600 seconds in a fortnight (14days/fortnight x 24 hours/day x 60 min/hour x 60 seconds/min) so the implied error is a bit less than 1PPM.

Dave

"Experience keeps a dear school ..but a fool learns in no other" ..Ben Franklin

On 7/13/2012 8:09 AM, Steve wrote:

But what if a leap second occurs during the fortnight the standard is being set? ;)

Steve

On Jul 13, 2012, at 7:22 AM, "Poul-Henning Kamp"phk@phk.freebsd.dk  wrote:

In message4FFFEBEC.8030802@embarqmail.com, Artekmedia writes:

Yes, I'd expect the last non-metric country in the world to go for that :-)

Coulombs per fortnight to be sure :-)

On 7/13/2012 2:40 AM, Poul-Henning Kamp wrote:

No practical quantum Ampere so far?

It has always surprised me that the Ampere was not defined in terms of
electron charges per second...

--
Dave&  Lynn Henderson
Manuals@ArtekMedia.com
www.Artekmedia.com
PO Box 175
Welch,MN 55089


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.

--
Poul-Henning Kamp      | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG        | TCP/IP since RFC 956
FreeBSD committer      | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.


volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
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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.

--
Dave&  Lynn Henderson
Manuals@ArtekMedia.com
www.Artekmedia.com
PO Box 175
Welch,MN 55089


volt-nuts mailing list -- volt-nuts@febo.com
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I wouldn't lose any sleep over it, but maybe I'm not "nutty" enough for the current discussion :-o Steve On Jul 13, 2012, at 10:49 AM, Artekmedia <henderson47@embarqmail.com> wrote: > There are 1,209,600 seconds in a fortnight (14days/fortnight x 24 hours/day x 60 min/hour x 60 seconds/min) so the implied error is a bit less than 1PPM. > > > Dave > > "Experience keeps a dear school ..but a fool learns in no other" ..Ben Franklin > > > On 7/13/2012 8:09 AM, Steve wrote: >> But what if a leap second occurs during the fortnight the standard is being set? ;) >> >> Steve >> >> >> >> On Jul 13, 2012, at 7:22 AM, "Poul-Henning Kamp"<phk@phk.freebsd.dk> wrote: >> >>> In message<4FFFEBEC.8030802@embarqmail.com>, Artekmedia writes: >>> >>> Yes, I'd expect the last non-metric country in the world to go for that :-) >>> >>>> Coulombs per fortnight to be sure :-) >>>> >>>> On 7/13/2012 2:40 AM, Poul-Henning Kamp wrote: >>>>> In message<CAE6XXrjKES2=BPCNyzOcbXFM73+4ztOTAkUEcTTaqTsDuvrJGw@mail.gmail.com> >>>>> , Will writes: >>>>> >>>>>> No practical quantum Ampere so far? >>>>> It has always surprised me that the Ampere was not defined in terms of >>>>> electron charges per second... >>>>> >>>> -- >>>> Dave& Lynn Henderson >>>> Manuals@ArtekMedia.com >>>> www.Artekmedia.com >>>> PO Box 175 >>>> Welch,MN 55089 >>>> >>>> >>>> _______________________________________________ >>>> 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. >>>> >>> -- >>> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 >>> phk@FreeBSD.ORG | TCP/IP since RFC 956 >>> FreeBSD committer | BSD since 4.3-tahoe >>> Never attribute to malice what can adequately be explained by incompetence. >>> >>> _______________________________________________ >>> 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. >> > > -- > Dave& Lynn Henderson > Manuals@ArtekMedia.com > www.Artekmedia.com > PO Box 175 > Welch,MN 55089 > > _______________________________________________ > 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.
S
Steve
Fri, Jul 13, 2012 4:42 PM

I avoided the effects of the most recent one by sneezing at exactly the right time. Not a popular thing to do at the dinner table but when ya gotta sneeze, ya gotta sneeze!

Dave, if we didn't exist who would drink the beer???

Steve

On Jul 13, 2012, at 11:23 AM, Artekmedia henderson47@embarqmail.com wrote:

Actually it is pretty easy to avoid leap seconds as they are usually introduced on June 30 or Dec 31 and only 25 leap seconds have been introduced in the last 40 years, the most recent one on June 30th, 2012...given that figure,  the implied error due to leap seconds is much much less than the simple example below.

Dave
Now my head is beginning to hurt as I ponder the reasons why man exists and the statistical probability of sentiment life in the rest of the universe.  I am now going to find a beer and kill off a few of my 1.2 x 10^11 brain cells..hopefully I will get the ones that care about this stuff at all.

On 7/13/2012 10:49 AM, Artekmedia wrote:

There are 1,209,600 seconds in a fortnight (14days/fortnight x 24 hours/day x 60 min/hour x 60 seconds/min) so the implied error is a bit less than 1PPM.

Dave

"Experience keeps a dear school ..but a fool learns in no other" ..Ben Franklin

On 7/13/2012 8:09 AM, Steve wrote:

But what if a leap second occurs during the fortnight the standard is being set? ;)

Steve

On Jul 13, 2012, at 7:22 AM, "Poul-Henning Kamp"phk@phk.freebsd.dk  wrote:

In message4FFFEBEC.8030802@embarqmail.com, Artekmedia writes:

Yes, I'd expect the last non-metric country in the world to go for that :-)

Coulombs per fortnight to be sure :-)

On 7/13/2012 2:40 AM, Poul-Henning Kamp wrote:

No practical quantum Ampere so far?

It has always surprised me that the Ampere was not defined in terms of
electron charges per second...

--
Dave&  Lynn Henderson
Manuals@ArtekMedia.com
www.Artekmedia.com
PO Box 175
Welch,MN 55089


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.

--
Poul-Henning Kamp      | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG        | TCP/IP since RFC 956
FreeBSD committer      | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.


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.

--
Dave&  Lynn Henderson
Manuals@ArtekMedia.com
www.Artekmedia.com
PO Box 175
Welch,MN 55089


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.

I avoided the effects of the most recent one by sneezing at exactly the right time. Not a popular thing to do at the dinner table but when ya gotta sneeze, ya gotta sneeze! Dave, if we didn't exist who would drink the beer??? Steve On Jul 13, 2012, at 11:23 AM, Artekmedia <henderson47@embarqmail.com> wrote: > Actually it is pretty easy to avoid leap seconds as they are usually introduced on June 30 or Dec 31 and only 25 leap seconds have been introduced in the last 40 years, the most recent one on June 30th, 2012...given that figure, the implied error due to leap seconds is much much less than the simple example below. > > Dave > Now my head is beginning to hurt as I ponder the reasons why man exists and the statistical probability of sentiment life in the rest of the universe. I am now going to find a beer and kill off a few of my 1.2 x 10^11 brain cells..hopefully I will get the ones that care about this stuff at all. > > > On 7/13/2012 10:49 AM, Artekmedia wrote: >> There are 1,209,600 seconds in a fortnight (14days/fortnight x 24 hours/day x 60 min/hour x 60 seconds/min) so the implied error is a bit less than 1PPM. >> >> >> Dave >> >> "Experience keeps a dear school ..but a fool learns in no other" ..Ben Franklin >> >> >> On 7/13/2012 8:09 AM, Steve wrote: >>> But what if a leap second occurs during the fortnight the standard is being set? ;) >>> >>> Steve >>> >>> >>> >>> On Jul 13, 2012, at 7:22 AM, "Poul-Henning Kamp"<phk@phk.freebsd.dk> wrote: >>> >>>> In message<4FFFEBEC.8030802@embarqmail.com>, Artekmedia writes: >>>> >>>> Yes, I'd expect the last non-metric country in the world to go for that :-) >>>> >>>>> Coulombs per fortnight to be sure :-) >>>>> >>>>> On 7/13/2012 2:40 AM, Poul-Henning Kamp wrote: >>>>>> In message<CAE6XXrjKES2=BPCNyzOcbXFM73+4ztOTAkUEcTTaqTsDuvrJGw@mail.gmail.com> >>>>>> , Will writes: >>>>>> >>>>>>> No practical quantum Ampere so far? >>>>>> It has always surprised me that the Ampere was not defined in terms of >>>>>> electron charges per second... >>>>>> >>>>> -- >>>>> Dave& Lynn Henderson >>>>> Manuals@ArtekMedia.com >>>>> www.Artekmedia.com >>>>> PO Box 175 >>>>> Welch,MN 55089 >>>>> >>>>> >>>>> _______________________________________________ >>>>> 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. >>>>> >>>> -- >>>> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 >>>> phk@FreeBSD.ORG | TCP/IP since RFC 956 >>>> FreeBSD committer | BSD since 4.3-tahoe >>>> Never attribute to malice what can adequately be explained by incompetence. >>>> >>>> _______________________________________________ >>>> 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. >>> >> > > -- > Dave& Lynn Henderson > Manuals@ArtekMedia.com > www.Artekmedia.com > PO Box 175 > Welch,MN 55089 > > _______________________________________________ > 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.