Products > Test Equipment

Keysight's new 34465A (6.5 digit) and 34470A (7.5 digit) bench multimeters

<< < (138/145) > >>

maxwell3e10:
I wonder if some of the standard deviation is due to long term drift. One can clearly see a double-peaked distribution on the 34465A.
One would have to save the raw data and calculate the Allan variance to separate short term noise from long term drift. 

Andreas:

--- Quote from: HighVoltage on January 18, 2019, 09:59:58 am ---I am not sure what happened to the 34465A this time.

--- End quote ---

Temperature drift or even worse: popcorn noise?
Do you have the data over time?

with best regards

Andreas

TheSteve:
Thought I'd give this a try on my 34461A. It ran overnight and through the day. The twin peaks are the cooler temp of night and the warmer temp of day in the house. It would be nice to see no change with temperature but overall it seems the two temps are maintained quite well. There is a 3 degree C temp shift.

dmm2018:

--- Quote from: TheSteve on January 21, 2019, 02:42:16 am ---Thought I'd give this a try on my 34461A. It ran overnight and through the day. The twin peaks are the cooler temp of night and the warmer temp of day in the house. It would be nice to see no change with temperature but overall it seems the two temps are maintained quite well. There is a 3 degree C temp shift.

--- End quote ---

I also got similar plot (2 peaks) sometimes... I believe it's due to temperature drift... in my case, when I placed the meter is a slightly different orientation, I could see it started to drift then settled at a new peak...

Messtechniker:
And another one. :P
Ambient temp. was 20.5 +- 0.5 during measurement :palm:

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod