...@febo.com] On Behalf Of Charles Black
Sent: Friday, August 29, 2014 3:44 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] 732A and Prologix received
Hi Don,
I'm a bit of trouble sending you this message for some reason. Maybe the third
ti me is the charm.
Thanks for sharing
, 2014 3:44 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] 732A and Prologix received
Hi Don,
I'm a bit of trouble sending you this message for some reason. Maybe the third
ti me is the charm.
Thanks for sharing the graph a few days ago. My 3458A graphs look about
/r5vl3v0k3s9t8n1/Lab%20Temp%208-22%20to%208-30%202014.pdf?dl=0
Don
-Original Message-
From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of Charles Black
Sent: Friday, August 29, 2014 3:44 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] 732A and Prologix received
Hi
, August 29, 2014 3:44 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] 732A and Prologix received
Hi Don,
I'm a bit of trouble sending you this message for some reason. Maybe the third
ti me is the charm.
Thanks for sharing the graph a few days ago. My 3458A graphs look
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Hi Don,
I'm a bit of trouble sending you this message for some reason. Maybe the
third ti me is the charm.
Thanks for sharing the graph a few days ago. My 3458A graphs look about
the same except I only do voltage so far. I use NPLC 1000 which looks
smoother but doesn't really have any
In message CAPmQ2J_Fa1Oo6m=doj-u05f4dqhgpakdvjpsvggyrofe6tj...@mail.gmail.com
, Stan Katz writes:
*real* metrology purists keep their instruments in a pre helium atmosphere
to improve cooling, prevent corrosion and stop people from breathning on
things :-)
--
Poul-Henning Kamp |
with the 34420a and 3458a. no. so
for me at least the answer is simple.
Gesendet: Mittwoch, 27. August 2014 um 23:50 Uhr
Von: Stan Katz stan.katz...@gmail.com
An: Discussion of precise voltage measurement volt-nuts@febo.com
Betreff: Re: [volt-nuts] 732A and Prologix received
As a non-scholar
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, 26. August 2014 um 04:23 Uhr
Von: Randy Evans randyevans2...@gmail.com
An: Discussion of precise voltage measurement volt-nuts@febo.com
Betreff: Re: [volt-nuts] 732A and Prologix received
Is there any way to tell when the function key routine is complete? In
the
case of taking multiple
: Dienstag, 26. August 2014 um 04:23 Uhr
Von: Randy Evans randyevans2...@gmail.com
An: Discussion of precise voltage measurement volt-nuts@febo.com
Betreff: Re: [volt-nuts] 732A and Prologix received
Is there any way to tell when the function key routine is complete? In
the
case of taking
. has a drift of 0.2ppm per
year.
Gesendet: Mittwoch, 27. August 2014 um 14:36 Uhr
Von: Randy Evans randyevans2...@gmail.com
An: Discussion of precise voltage measurement volt-nuts@febo.com
Betreff: Re: [volt-nuts] 732A and Prologix received
I forgot to mention that I reduced the number
, August 26, 2014 2:16 PM
Subject: Re: [volt-nuts] 732A and Prologix received
Bill,
I measured the time between SMPL symbols with NPLC set to 1000 and it is
approximately 33 seconds. It takes an hour to complete 100 readings.
Randy
On Mon, Aug 25, 2014 at 10:01 PM, Bill Gold wpgold3
[mailto:volt-nuts-boun...@febo.com] On Behalf Of acb...@gmx.de
Sent: Wednesday, August 27, 2014 8:42 AM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] 732A and Prologix received
well, what you do is to measure the stability of the 3458a. 1ppm drift though
sounds much
Betreff: Re: [volt-nuts] 732A and Prologix received
I forgot to mention that I reduced the number of measurements to 100 per
set since I wasn't seeing much difference in the variance between 100 and
1000 measurements and the 1000 measurement per set takes too long.
Randy
On Wed, Aug 27
, August 27, 2014 8:42 AM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] 732A and Prologix received
well, what you do is to measure the stability of the 3458a. 1ppm drift
though sounds much as overall short term average variation if your
temperature is stable and your
measurement
Subject: Re: [volt-nuts] 732A and Prologix received
Don,
If I am reading your charts correctly, it looks like your system is cycling
over an 7 uV range over several days in summer, similar to what I am seeing. I
don't have air conditioning (Northern California) so I do get some pretty
. August 2014 um 15:37 Uhr
Von: Randy Evans randyevans2...@gmail.com
An: Discussion of precise voltage measurement volt-nuts@febo.com
Betreff: Re: [volt-nuts] 732A and Prologix received
The HP3458A and the Fluke 732A are on continuously and I do an ACAL at
least every few hours, or when the room
On 26/08/2014 16:05, Mike S wrote:
After some more research, I think I've answered some of my own
questions -
Tellurium copper is used for binding posts, not because it has any
special thermal or EMF mojo, but because it machines much better than
pure copper. And, I suppose, because it
As a non-scholar in metrology, I tend to want to simplify the results of an
academic debate to make the results of the debate useful to me. One thing
is clear from my web search, copper alloyed with Tellurium, or Beryllium,
still oxidizes, only at a slower rate. It appears that a big disadvantage
randyevans2...@gmail.com
To: Discussion of precise voltage measurement volt-nuts@febo.com
Sent: Monday, August 25, 2014 9:23 PM
Subject: Re: [volt-nuts] 732A and Prologix received
Is there any way to tell when the function key routine is complete? In
the
case of taking multiple readings
of precise voltage measurement volt-nuts@febo.com
Betreff: Re: [volt-nuts] 732A and Prologix received
Is there any way to tell when the function key routine is complete? In the
case of taking multiple readings using the DEFKEY and MATH function, I
don't see any indication when the routine
:33 Uhr
Von: Orin Eman orin.e...@gmail.com
An: Discussion of precise voltage measurement volt-nuts@febo.com
Betreff: Re: [volt-nuts] 732A and Prologix received
On Sun, Aug 24, 2014 at 1:46 PM, Don@True-Cal truecalservi...@gmail.com
wrote:
Randy all,
You have correctly concluded
Message -
From: Randy Evans randyevans2...@gmail.com
To: Discussion of precise voltage measurement volt-nuts@febo.com
Sent: Sunday, August 24, 2014 6:04 PM
Subject: Re: [volt-nuts] 732A and Prologix received
Bill,
I am trying to figure out the MATH function without much success. I input
voltage measurement
Subject: Re: [volt-nuts] 732A and Prologix received
I have used the pomona spades, mainly to interface the low emf pomona banana
cables to binding posts. I have stopped this, reasons being, they are large and
worse, that the pomona spring loaded insulation tube that covers
truecalservi...@gmail.com
An: 'Discussion of precise voltage measurement' volt-nuts@febo.com
Betreff: Re: [volt-nuts] 732A and Prologix received
Tellurium Copper is usually not used for a device's terminal posts but used
as the lead wire due, as you say, for the malleability to crimp well
On 8/25/2014 11:02 AM, Don@True-Cal wrote:
Silver or Gold plating on the terminal or wire will introduce the
undesirable dissimilar metal properties, both at the plating
junction and at the plating metal to DUT terminal.
Why?
Any Seebeck effect is immediately offset in the opposite
is driving my arguments
but it never hurts to have physical-science on your side.
Don Johnson
-Original Message-
From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of Mike S
Sent: Monday, August 25, 2014 11:03 AM
To: volt-nuts@febo.com
Subject: Re: [volt-nuts] 732A and Prologix
rate.
Bill
- Original Message -
From: Randy Evans randyevans2...@gmail.com
To: Discussion of precise voltage measurement volt-nuts@febo.com
Sent: Monday, August 25, 2014 9:23 PM
Subject: Re: [volt-nuts] 732A and Prologix received
Is there any way to tell when the function key routine
in
the leads.
I hope all of this helps.
Bill
- Original Message -
From: Randy Evans randyevans2...@gmail.com
To: Discussion of precise voltage measurement volt-nuts@febo.com
Sent: Friday, August 22, 2014 9:03 PM
Subject: Re: [volt-nuts] 732A and Prologix received
Todd
Sent: Friday, August 22, 2014 9:03 PM
Subject: Re: [volt-nuts] 732A and Prologix received
Todd,
Thanks for the info. I have several Panasonic 12V 7 AH batteries that I
keep topped off and they have very low current draw (~2 to 3 mA at 13.5
VDC) when charged and at their float voltage, so
randyevans2...@gmail.com
To: Discussion of precise voltage measurement volt-nuts@febo.com
Sent: Friday, August 22, 2014 9:03 PM
Subject: Re: [volt-nuts] 732A and Prologix received
Todd,
Thanks for the info. I have several Panasonic 12V 7 AH batteries that I
keep topped off and they have very low
:22 AM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] 732A and Prologix received
Bill,
I have convinced myself that the problem I an seeing is due to thermals.
If I move the cables (with gold-plated banana plugs) using a small towel
rather than letting my hand touch
of precise voltage measurement volt-nuts@febo.com
Sent: Sunday, August 24, 2014 8:13 AM
Subject: Re: [volt-nuts] 732A and Prologix received
Bill,
I use a lot of the 12v 7ah batteries for my UPS backups and 732B. But yes,
I was mistaken. The 12V 5ah batteries are the ones that I am using in one
of my
for being so
detailed sometimes.
Bill
- Original Message -
From: Randy Evans randyevans2...@gmail.com
To: Discussion of precise voltage measurement volt-nuts@febo.com
Sent: Sunday, August 24, 2014 7:22 AM
Subject: Re: [volt-nuts] 732A and Prologix received
Bill,
I have convinced myself
: [volt-nuts] 732A and Prologix received
Bill,
I use a lot of the 12v 7ah batteries for my UPS backups and 732B. But
yes,
I was mistaken. The 12V 5ah batteries are the ones that I am using in one
of my 732A. There is more play inside the tray with the 12v batteries by
several mm
Evans randyevans2...@gmail.com
To: Discussion of precise voltage measurement volt-nuts@febo.com
Sent: Sunday, August 24, 2014 7:22 AM
Subject: Re: [volt-nuts] 732A and Prologix received
Bill,
I have convinced myself that the problem I an seeing is due to thermals.
If I move the cables
detailed sometimes.
Bill
- Original Message -
From: Randy Evans randyevans2...@gmail.com
To: Discussion of precise voltage measurement volt-nuts@febo.com
Sent: Sunday, August 24, 2014 7:22 AM
Subject: Re: [volt-nuts] 732A and Prologix received
Bill,
I have convinced myself
measurement volt-nuts@febo.com
Sent: Sunday, August 24, 2014 7:22 AM
Subject: Re: [volt-nuts] 732A and Prologix received
Bill,
I have convinced myself that the problem I an seeing is due to thermals.
If I move the cables (with gold-plated banana plugs) using a small towel
rather than letting my hand
On Sun, Aug 24, 2014 at 1:46 PM, Don@True-Cal truecalservi...@gmail.com
wrote:
Randy all,
You have correctly concluded that some (maybe not all) of your measurement
problem is thermal EMF being added or subtracted in series within your
measurement interconnect. This thermal EMF is generated
04:03 Uhr
Von: Randy Evans randyevans2...@gmail.com
An: Discussion of precise voltage measurement volt-nuts@febo.com
Betreff: Re: [volt-nuts] 732A and Prologix received
Todd,
Thanks for the info. I have several Panasonic 12V 7 AH batteries that I
keep topped off and they have very low
Subject: Re: [volt-nuts] 732A and Prologix received
Todd,
Thanks for the info. I have several Panasonic 12V 7 AH batteries that I
keep topped off and they have very low current draw (~2 to 3 mA at 13.5
VDC) when charged and at their float voltage, so I am pretty sure they are
in good condition
I received my Fluke 732A today. Just powered it up but it needs new
batteries. Any suggestions for sources (I haven't opened up the unit yet -
I want to make sure it works before doing that). Also received the
ProLogix USB-GPIB adapter. I plan on using Mark Sims' CAL ran data dumper
program to
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