Many thanks to all for your replies on both these topics. I have not addressed
many of the comments regarding standards because I now have a LOT of material
to go through, read, and understand. Also looking at purchasing a copy of the
Fluke "Calibration: Philosophy in Practice" which will hope
FYI, I bought two of these used 3458A reference boards for $85 each a few
years ago and they both experience noise bursts. I plan on replacing the
LTZ1000 chips on them (sometime in the near future).
Randy Evans
AE6YG
On Sun, Mar 12, 2017 at 10:53 AM, m k wrote:
>
>
> On 12/03/17 17:27, Dr. Da
On 12/03/17 17:27, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
> On Sun, 12 Mar 2017 at 17:03, Frank Stellmach
> wrote:
>
>> Hi Chris,
>>
>>
>>
>> Therefore, instead of poking around with these mediocre 10V
>> "references", I'd look for a possibility to get access to a 3458A, maybe
>> there'
>There are a number of reference boards supposedly removed from 3458As
on eBay.
>Assuming they are non counterfeit (not necessarily a valid assumption
for items on eBay), how easy would they be to integrate into a box to
make a stable reference?
>The LTZ1000A chip is about $50 new, but to make a
On Sun, 12 Mar 2017 at 17:03, Frank Stellmach
wrote:
> Hi Chris,
>
>
>
> Therefore, instead of poking around with these mediocre 10V
> "references", I'd look for a possibility to get access to a 3458A, maybe
> there's a friendly volt-nuts nearby.
>
> Frank
>
There are a number of reference boar
The navel is not just for collecting lint, you can also temp stabilize a
silver or mercury button cell there. Or in the armpit. Or up in other
cavities of the body. Preferrably measure very quick or at least at the
same time of day.
Hendrik
___
vol
Hi Chris,
I remember getting an 1.5V mercury cell with a 4 1/2 digit DVM kit, so
that's about the level of stability you can achieve with such a battery.
Alcaline batteries, and so on, forget about it.
For a Fluke 332A, you need on the order of 5ppm uncertainty for a proper
adjustment of the
Brooke wrote:
There are a few low cost voltage standards available where the maker has
an HP 3458. For example by Geller
Geller has been gone as a supplier since 2013 (most of the web site is
still up as an archive, but he is no longer selling the voltage
"references").
There are a few lo
How do silver oxide cells compare to mercury cells for voltage
stability? When I last looked into this, I concluded that there were
two different silver oxide chemistries with a slight variation in
voltage between them.
On Sat, 11 Mar 2017 09:21:02 -0800, you wrote:
>Hi Chris:
>
>I think it was
On 03/11/2017 11:51 AM, kc9ieq via volt-nuts wrote:
> In preparation of (hopefully!) Getting that fluke 332A running and
> sticker shock of what the 732A and similar references go for, I
> wonder about normal, every day alkaline or lithium batteries and
> their short term stability. Â Here's the
Hi Chris:
I think it was my Heathkit VTVM that said to get a fresh AA battery and use it as a 1.52 Volt standard to calibrate the
meter. An even better way was to use a Mercury coin cell since they were 1.35 volts and very stable. They were used for
light meters and voltage references because
In preparation of (hopefully!) Getting that fluke 332A running and sticker
shock of what the 732A and similar references go for, I wonder about normal,
every day alkaline or lithium batteries and their short term stability.
Here's the half baked idea. A fresh, standard 1.5V, or 3V lithium, alk
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