Thank you for this very in-depth review. Dave Jones did a tear down of the SDM3055 and I liked the build quality. This is higher accuracy and brilliant value for money compared with the Keysight of which it's a copy. It's on my shopping list now! :-)
I think on other channels it has been mentioned before but the Siglent SDM3065X front panel looks almost identical to the Keysight 34461A. I have the Keysight and also the Fluke 45 and enjoy them. I bought the Fluke 45 what seems like decades ago ; ) You have a nice channel and I subscribed.
You should test the 2 wire and 4 wire resistance measurements using a sub ohm resistor. To really push it you can "try" a standard Current Shunt, 10 Amp, 75 millivolt, 5% (75/10=7.5 milliohm) More realistic results might be obtained with 0.5 or 0.25 ohm resistors. Validate using a known current and the voltage drop across the resistor.
I have this exact multimeter. It has an adjustable continuity threshold. Today, I found a handy use for that function... I had a diode in parallel with a low value resistor. Measuring the diode in circuit (yes, I know that is not a good idea, but I was spitballing) the diode showed as bad with both the diode function and the continuity function. I dropped the continuity threshold and the diode showed as good. What other uses is this function good for?
I have just bought two used 50$ uni-t ut801 bench multimeter, just to check if there is power or not. I know that they can't measure more accurate then my own tongue and a finger in the ground, but still great to have, just for getting a idea about the amount. :-) Have you ever looked at one?
could you please make a short video showing the general update rate and specially autoranging speed of the device in various modes (Cap, DCV, R for example) also the diode testing.
bobwhite137 - there was no noticeable drift when I last connected it to my AC or DC calibrators, I will be checking it’s calibration sometime soon when I get my hands on a nice freshly calibrated calibrator.
ALL multimeters that do capacitance, they do it by charging the cap with a constant current source and measure the rate of charging i=C (dv/dt). So it is basically at DC by ramping up the charge linearly and see how long it takes to reach a threshold voltage and then they calculate it. This is very different than LCR meters which are based on impedance measurement using a wheatstone bridge usually.
You trust more to that crap chinese voltage reference with 6 meters in parallel? Really? What impedence you have here? 1.66MOhm. And a lot of antennas, a lot of loosey connections between wires, what roomtemperature? what do you know about electronics? i guess the siglent is the most acurate device here - fresh calibrated... your reference isnt a thrue reference under that circumstances....
AllesDriss - I wasn't looking at absolute accuracy, using that reference obviously, what I was looking at was relative accuracy between the meters, any stable voltage source is usable for that,
I'm with LastManStanding; this whole video is questionable. You have a bunch of meters all hooked up in parallel and none of their measurements agree. Buy yourself a calibrator if you are going to make videos like this.
Nick Tolley - of course they all say something different, that was part of the point of doing it, no two meters will say exactly the same thing,unless they have just been calibrated, my fluke and hp meters haven't been calibrated in over a decade, the Vici is questionable regardless, and the eevblog doesn't have the resolution. All the meters should be fine in parallel when they are reading the power supply, that isn't short of current. Besides the amount of error between them is very small, the worst error was on the vici, which was expected. I do now own a calibrator, I did a few videos on its repair.
Thanks a lot for a great review, worth every minute! I am new to all this so please forgive my question but why bye a 6 1/2 instead of a cheaper 4 1/2 if it is only accurate to two digits?
