I kept both units (34401a and 3065X) running for one week now.
After 24h the 3065x was a little bit above the HP, but starting with day #2 till today (day #7) its is about 40...50 uV below the HP (or the HP above the Siglent) and stays at this level.
The question is now, which device is more accurate
I can see clearly the rabbit hole in front of me....
That looks very promising! Just for fun I placed my preferred handheld meter (UT181) and my old Fluke 87 (first generation, switched to 4.5 digit mode) because I read in the other SDM-issue thread about
such kind of comparison.
I played with the device during this week and it seems to be better than expected (but with the price I paid in mind).
Menus are not that intuitive but that I can learn. The display is great! And the fan noise is much lower than I expected after some comments here.
It's on the same level as my SDG2042X.
some issues and wishes that came up after playing with it:
#1 as mentioned by others the second measurement value is to small on the display - why??
#2 Trend chart is nice but I found no way to get access to the data or to go to a special time point on the time line
#3 I expected a kind of simple "Recording" function with file save on USB stick or internal as I have it with my UT181 (a nice copy of the Fluke 187 but faster and with much better display...and some other issues) see photo.
(I know that this is not the typical case for a bench DMM since there is all the PC software available but it should be easy to implement and very handy for simple measurement recording. Or have I overseen something?
#4 why the DMM needs 3 watts when powered of? Is it keeping the reference heated???
Edit:
o.k. I now found out that the DMM is storing measurements in 7 digits ongoing on an USB stick but the behavior is not really clear to me. Thanks to the great handbook!
How to use it best? With external trigger? With run/stop? Can someone give me advice? Is there a time stamp available?
A final question to Tautech:
My device has a certificate of 2021-01-21 but warranty (from the siglent web) till 2024-05-03, why this difference?
It has the hardware revision 02-02-00-05-00
I assume that manufacturing date is short before date of certification ?