Bigger Volt-nut here.
...albeit, less knowledgeable than most of you.
I have been in the chase for the perfect volt.
I have 2 JRL SCO-105 saturated cell references running 24/7.
But checking it's accuracyI must rely on my cal'd HP3457 meter.
Although, those cells (6 total, 3 in each cabinet)
Randy Leifer wrote:
Bigger Volt-nut here.
...albeit, less knowledgeable than most of you.
I have been in the chase for the perfect volt.
I have 2 JRL SCO-105 saturated cell references running 24/7.
But checking it's accuracyI must rely on my cal'd HP3457 meter.
Although, those cells (6
Hello,
there's currently no easy way to convert a frequency into Volt, i.e.
other than by cryo Josephson junction array or realizing Ohm by a
Klitzing quantum hall effect device. Otherwise, FLUKE would have
implemented that already in their Calibrators/Standards. They still rely
on Artefact
Another (sometimes) relatively inexpensive outstanding reference is
either a Datron 4910 or 4912. These are also LTZ1000 based. The 10 has
one reference, the 12 has four that can be averaged or used
independently. You can on rare occasions pick one up for a few hundred.
I have a pair, and yes,
@Bill Ezell:
Well, I have the same motivation to invest time and money into precision.
I started with metrology working in a German Airforce cal lab in 1980.
We had all that goddie equipment, ie. a bank of Weston standard cells,
the Fluke cal system, DCF receiver, a HP caesium standard, and so
Yes, I do have full schematics for the Datron refs, including the
LTZ1000 circuitry. It isn't the same as that in the LTZ1000 data sheet.
I'll dig out my manuals. If you'd like a copy, email your postal address
and I'll copy the page and send it to you:
[EMAIL PROTECTED]
I've built a few
Obsession for precision is the same whether one is after Hertz,
Volts, or Degrees of Celsius (Or Fahrenheit).
The methods and technology are similar...
I am now trying to fix two HP2804A quarz thermometers, thet are
giving some error codes, and do not work.
More or less they are oscillators,
Hi,
Temperature is one quantity that is (or was) determined by physical
properties of substances.
I have a platinum resistance thermometer, but alone it is useless.
The simplest way of using it is to connect it in 4 wire mode to a HP
3468A multimeter,
and it measures the resistance with a
