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Keysight DMM - Yay or nay?

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Cerebus:

--- Quote from: Traceless on March 02, 2022, 09:01:22 am ---@Domitronic: Thanks, that is a very interesting point. Speaking of "screwing up auto range". My number one complaint with my current DMM is that auto range is excrutiatingly slow, also AC current measurements tend to have a long delay to the point where I'm now convinced that my DMM is actively trying to kill me (sometimes it does not pick up mains voltage in a reasonable time frame). That's why I nicknamed it Christine.  Can I assume that, aforementioned bug aside, KS, Keithley and Siglent don't suffer from that problem?

--- End quote ---

Cue George Thorogood and the Destroyers:

Da da da da da dum de-dum de-dum
Da da da da da dum de-dum de-dum

Bad to the bone
Da da da da dum
Bad to the bone
Da da da da dum
B-b-b-b-b-bad
Da da da da dum
B-b-b-b-b-bad

Traceless:
@cerebus: Yep, pretty sure they played that song during the assembly of my DMM as well ;)

Traceless:

--- Quote from: Markus2801A on March 02, 2022, 01:09:43 pm ---I just want to bring in the GW-Instek GDM-906x Series with two types namely GDM- GDM-9060 and the  GDM-9061
What do you guys think of them?

--- End quote ---

Hey Markus, thanks for bringing these meters to my attention. I took a quick look at the GDM-9061's specs and it seems that the Siglent SDM 3065X is more accurate, also the Siglent has 2200000 counts vs the 1200000 counts of the GWInstek plus the GDM-906x models seem to be more expensive. Unless the GWInstek has some trick up its sleeve that I missed while skimming over the specs the SDM 3065X would be the better option.

blackdog:
Hi,

I have 2x a 34461A 1x 34465a and a Keithley 6500.
The reason I bought a Keithley 6500 in December 2021 is because I wanted to try how another brand does in terms of 10V stability.

My 34465a was a big disappointment, the Autocal is Markerting Bullshit. my instrument has been away from home for 6 months to Malaysia for verification of the problem that when you do an autocal it drifts out again within 20 minuter if the temperature in the measuring instrument remains stable.

The service here in Holland from KEySight was excellent, I got a loaner instrument and this loaner instrument had exactly the same problem.

Keysight Maleysia told me that the drift that occurred remained within the daily average and therefore they can't do anything about it...
Don't buy the 34465a for the autocal! but the instrument has more useful features that might make it worth buying this type anyway, like the ezxxtra filtering that is possible, just to name one aextra feature.

My Keitley DMM6500 sat now for almost two months and the deviation on the 10V range stays within +-1PPM at varying lab temperatures, this is very good, and better than my three Keysight 3446x series meters.

As far as the interface is concerned, at the moment my preference is slightly with the KeySight.
But I haven't had time enough to do e.g. scripting on the Keithley meter.

So you will have to make your own trade-offs as to what is best for you.
Also see if temperature measurements are important to you so you can connect accurate sensors to the DMM you choose.

Kind regards,
Bram

Kleinstein:
The GDM906x meters seem to have rear terminals, that I don't see with the sigilent.
At least the GDM9060 seems to use a comparable SD ADC chip to the Sigilent.

There is also a Teledyn (T3DMM6-5), that seems to be essetially the same as the Sigilent - possibly an OEM build.

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