New Siglent SDM4000A series Multimeter

[vsilves]

I bought this for $20 bucks from China, which took a couple of weeks.  It is like a generic optocoupler to micro-USB serial interface board stuffed inside a 3D printed plastic part, and a second 3D printed part that locks to the first one.  No USB cable or anything else provided.  The assembly fits into the Fluke 289's void between the meter and its stand on the back, (instead of locking perfectly to the opto port as I thought it would), but works fine.  Would like it to have some more weight and close the gap better, but works no issues at 115200 baud on MacOS.  It was pretty easy to research the Fluke serial command interface (in these forums mostly).

https://sandboxelectronics.com/?product=opto-isolated-usb-ir-adapter-for-fluke

I have never used FlukeView Forms software.

[TylerPeppy]

@S13

I just got my SDM4065A on Wednesday (FW 0.0.0.20), so haven't had much time to collect this data as of yet; although the meter has been powered on fully since then (21.0C ambient). I replicated your setup (2ADC range, 10 / 100PLC, AZ on / off) and see some similarities:

With AZ ON, 100PLC, and no REL, I am seeing <= +0.000045ADC. I have attached a picture for reference.

With AZ OFF, 100PLC, and no REL, I am seeing larger zero offsets around -0.000080 ADC, up to -0.000145 ADC, which is odd in comparison. Slightly out of spec it would seem. my 200mA range doesn't seem to be significantly different than the values I stated earlier.

I will put together some more data soon, but my quick testing has numbers very similar to @Martin72 's post with the auto-zero enabled. Other than that, meter seem to be in spec for the most part.

Edit: Apologies, my pictures keep rotating themselves.

[S13]

Thanks that is very helpful!
Yes it seems your SDM4065A is somewhat better calibrated, but still slightly out of spec. Anything above 100uA in the 2A range is too much deviation.
I will relay this information back to Siglent.