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Trying out my new Keithley DMM7510, a 7.5 digit beast

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HighVoltage:

--- Quote from: Circuitous on July 09, 2015, 02:27:14 am ---I finally ran a successful 24 hour test, I'll try to do a longer one some time.

--- End quote ---
Thank you!
Very nice, to test it with a SVR-T from Geller.
I have exactly the same Geller voltage reference, so this can be a good comparison to my Keysight 34470A .

What I would like to see is the same test with 100 NPLC setting of the 7510 over 24 hours,
and the range manually set to 10 V, if you can.
Could you also save the data to a csv or excel file?


--- Quote ---And, here's the setup.  If you see anything to improve the tests, please let me know.

--- End quote ---
What I noticed in my test's is to keep all RF transmitter and receiver (WiFi, Cell-Phones) far away from the test setup.
Otherwise, was was said already: special low thermal emf leads might be a good investment.

Andreas:

--- Quote from: HighVoltage on July 09, 2015, 08:02:03 am ---Could you also save the data to a csv or excel file?

--- End quote ---

+1 .csv or .txt preferred.

Perhaps you can put a cloth over the setup to prevent air currents from creating thermal noise.

With best regards

Andreas

HighVoltage:
Recently I tested my Geller Labs SVR-T with 3 Agilent meters at the same time in parallel:
2 x Agilent 34461A
1 x Agilent 34470A

Here are the results in comparison after a 4h test.
Manual setting to 10V range
100 NPLC

I am mostly surprised about the small spikes during the test, although everything was far away from any known RF disturbance.


First Agilent 34461A


Second Agilent 34461A


Agilent 34470A

What I really like about your DMM7510 is that fact, that the standard deviation is shown in its nice units of nV instead of so many zeros. The DMM7510 seems to be a really amazing meter. May be you can produce a few more videos, showing the use of that meter.


 

Vgkid:
Thanks for that video.

Circuitous:

--- Quote from: HighVoltage on July 11, 2015, 09:22:44 am ---What I really like about your DMM7510 is that fact, that the standard deviation is shown in its nice units of nV instead of so many zeros. The DMM7510 seems to be a really amazing meter. May be you can produce a few more videos, showing the use of that meter.

--- End quote ---

There will definitely be more videos, enough to bore everyone.
Thank you all for the feedback.  I'll get some low thermal EMF leads, and do another test when I can.  I'll be getting back to some of my low-power measurements, which is why I bought this meter.  I look forward to more critiques.

Meanwhile, back to work (day job, every day).

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