Hi ,
Newer does not mean better. It's not "nuts" level, but my Fluke 8060A 4.5 digit
handhelds are more accurate and stable than my newer 89 IV. However most
"engineers" would pick up the 89.
I agree with Dave on UK " engineers" For many years I've been a member of the
very few groups of enginee
This all comes down to accreditation/Licensing. There are a lot of
situations that a co. rep is enough. Accreditation/Licensing costs money.
If you require them you will have to pay. Traceability can be had without
accreditation. Calibration has been around much longer that accreditation.
It all co
On Sun, Aug 11, 2013 at 3:36 PM, Orin Eman wrote:
>
> I should go get the kelvin clips out and compare the 3456A against the
> '61A on some 10k precision wirewound resistors I have.
>
I did. The resistors are MR102 series 0.01% 1/8W wirewound:
34461A: 10.000 82 +/- 0.000 90
3456A: 10.000 98 +
On 12 August 2013 17:43, Mike S wrote:
> On 8/12/2013 12:21 PM, Charles Steinmetz wrote:
>>
>> No, you could not perform ANY traceable calibration with the 3458A
>> itself, much less with any instrument you had calibrated with the 3458A,
>> because *you* are not accredited
>
>
> That's simply not
For USA buyers, Barrytech tracks eBay sold prices for > 10 years and I find his
estimates accurate. Despite the site's lack of updates, it compares well to the
3+ years I've tracked weekly prices on various Tek and HP models. I've used his
low price estimate as a guide to model's I don't track a
On 8/12/2013 2:23 PM, John Phillips wrote:
A calibration indicates that the unit under test is withing manufactures
specification. The equipment and procedure used has to be "good enough"
(bad words in a cal lab) to have a high probability (nothing is 100%) of
insuring the calibration documentati
A calibration indicates that the unit under test is withing manufactures
specification. The equipment and procedure used has to be "good enough"
(bad words in a cal lab) to have a high probability (nothing is 100%) of
insuring the calibration documentation is valid. Things can can be a
little loos
Hi Charles,
I've never heard of "leagal Tracability" in connection with calibration. Nist
say "NIST adopts for its own use and recommends for use by others the
definition of metrological traceability2 provided in the most recent version of
the International Vocabulary of Metrology: "property of
Hi Jan,
The component that fails in the Solartrons is a filter capacitor in the mains
inlet. It's an easy fix. Both the 7150 and the plus will read to 61/2 digits
but the accuracy is is only quoted to 51/2 digits. The plus has a slightly
better short term stability but the long term is hard to c
In message <20130812213441.yeqem...@smtp16.mail.yandex.net>, Charles Steinmetz
writes:
>>I have to disagree on one point, You CAN do a TRACABLE calibration
>>without any approval. What you can't do is ACCREDITED Calibration.
Agreed, those are two very different things.
Tracability is about t
Robert wrote:
I have to disagree on one point, You CAN do a TRACABLE calibration
without any approval. What you can't do is ACCREDITED Calibration.
Things may be different in the UK (after all, "traceability" is short
for "legal traceability," and the law of legal metrology may be
differen
On 8/12/2013 12:21 PM, Charles Steinmetz wrote:
No, you could not perform ANY traceable calibration with the 3458A
itself, much less with any instrument you had calibrated with the 3458A,
because *you* are not accredited
That's simply not true. Some organizations may require a lab to be
accred
Hi Charles,
I have to disagree on one point, You CAN do a TRACABLE calibration without any
approval. What you can't do is ACCREDITED Calibration. Many labs are
accredited but also offer un-accredited, tracable calibration at lower cost. An
example is that production test equipment could be tra
Sorry, Joe, if my question was mistakable. I wanted to know your
application. Maybe I'd recommend not using a special solder alloy rather
than going the long way of aquiring it.
I give you an example: When fixing a 6.5 digit DMM (HP34401A) I wasn't
sure if I might use a special alloy to sold
The Geller Labs SVR-T is another good option.
http://www.gellerlabs.com/Voltage%20References.htm
Robert G8RPI.
From: J. Forster
To: Discussion of precise voltage measurement
Sent: Monday, 12 August 2013, 15:11
Subject: [volt-nuts] Calibration Device
Da
I don think it would be useful for serius purposes.
2013/8/12 J. Forster
> David mentioned this:
>
> http://www.ebay.com/itm/281149723636
>
> What do people think of the device? Is it available direct from the
> seller, and, if so, does anyone have the contact address?
>
> Thanks,
>
> -John
>
>
Dave wrote:
I see a lot of sellers selling things on ebay which are NIST tracable,
but I wonder what this means.
Let's asume I borrow a 3458A 8.5 digit DVM which has a valid (i.e.
non- goldenrubi ) NIST tracable calibration, and use the 3458A to
calibrate my 4.5 digit handheld DVM. If I work ou
My main interest is as a 'sanity check'. I use DMMs for engineering purposes.
Shields up:
IMO, there are very few applications, other than fundamental physics
research, that really NEED 5,6,7, or 8+ digits.
I would no more use a multi digit DVM to do what can be done with a
differential voltmete
John wrote:
David mentioned this:
* * *
What do people think of the device?
What are you trying to accomplish? As I posted previously:
Let's assume that it is still working exactly the same as it was
when it was calibrated. The calibration values are recorded to
4-1/2 digits. So t
Throwing in my 2C on 5-1/2 - 6-1/2 digit DMMs on a budget
I have had a few Solartron / Schlumberger 7150, 7150 plus, 7151, 5-1/2
6-1/2 digit DMMs
Pro:
- available at very good prices on the net (especially in the UK?). I think
I paid around £50 for them. Except one bought brand new 20+ years ago.
John:
I bought one that looks just like that from:
http://www.voltagestandard.com/
It looks and works just fine as far as I can determine.
73 Gordon WA4FJC
Date: Mon, 12 Aug 2013 07:11:36 -0700 (PDT)
From: "J. Forster"
To: "Discussion of precise volt
On 11 August 2013 22:34, Charles Steinmetz wrote:
> Orin wrote:
>> BTW, they don't list any accreditation on the certificate.
>
>
> As I suspected. So it is vanishingly unlikely that they do traceable
> calibrations, contrary to their claim.
I see a lot of sellers selling things on ebay which a
Their web site is.
http://www.voltagestandard.com/
I bough their VREFR-01 a few years ago when they were trading as Malone
Electronics.
Regards
Nigel
GM8PZR
In a message dated 12/08/2013 15:17:35 GMT Daylight Time, j...@quikus.com
writes:
David mentioned this:
http://www.ebay
David mentioned this:
http://www.ebay.com/itm/281149723636
What do people think of the device? Is it available direct from the
seller, and, if so, does anyone have the contact address?
Thanks,
-John
===
___
volt-nuts mailing list -- volt
As I asked in my original message, I'm trying to find out where I can buy a
small quantity of rosin-core 10/90 (tin/lead) solder. I don't want to buy
it in bar form from China.
Joe Gray
W5JG
On Mon, Aug 12, 2013 at 3:17 AM, Volker Esper wrote:
>
> sorry, spelling mistake:
> "What do you _want
Hi Dave,
I find it interesting that goldenrubi uses other dealers websites as sources
for datasheets in his auctions!
I looked for a laminated HP panel for you but it seems all the one I have are
the earlier painted and screen printed versions.
Robert G8RPI.
Poul-Henning wrote:
People don't understand that "calibrated" doesn't mean that
it shows the right thing, but that you know how wrong it is.
A very pedantic expansion of the above (but then, this is volt-nuts):
"Calibrated" means that you know (i) what your best estimate of the
actual measur
In message
, "Dr. David Kirkby" writes:
>He seems to think that he could calibrate the kits if he
>had other kits of the same model.
That is a perception I have met more than once:
"I checked it with my other ${type} instrument, and they showed
(pretty much) the same, so it is calibrated."
Peo
On 11 August 2013 05:10, Orin Eman wrote:
> Well, lets discuss the 3456A I got from goldenrubi, calibrated. They send
> a calibration certificate which claims that their standards are traceable
> to NIST. I have no reason to doubt that. The list of standards used is
> reasonable for a 3456A.
I
sorry, spelling mistake:
"What do you _want_ it for?"
Remember, those solder alloys are optimized for a specific alloy
combination only, e.g. Cu-Cu.
Volker
Am 12.08.2013 10:39, schrieb Volker Esper:
Hi Joe,
What are you looking for, Cadmium-Solder, or Sn10Pb90, which is
Stannum/Plumbum-
Hi Joe,
What are you looking for, Cadmium-Solder, or Sn10Pb90, which is
Stannum/Plumbum-only?
And what do you what it for? In (very high) precision applications there
are so many issues to consider that the solder doesn't appear to be at a
high priority...
Volker
Am 12.08.2013 00:38, sc
On 12 August 2013 01:58, Charles Steinmetz wrote:
> David wrote:
>
>> How useful is this
>>
>> http://www.ebay.com/itm/281149723636 ?
>>
>> On the fact of it, the device would give one a reasonly high
>> confidence something is working readlably well. I wonder if that is
>> good enough for a 3457A
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