EEVblog #829 - Siglent SDM3055 Bench Multimeter Teardown

Inside the Siglent SDM3055 5.5 digit bench multimeter
And check out UI similarities with the Keysight 34461A

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[TheAmmoniacal]

Stop hating on Lelon, installed one last week and it still works!

[FFcossag]

The fact that they copy the Agilent UI is a REALLY GOOD THING. I don't want to be forced to learn half a library's worth of copyrighted wank terminology and menu layouts every time I switch brands.

[bikejoede]

6:49: looks like the whole sheetmetal part is punched in one step and it can be used on both sides even if the fan cutout on the one side seems useless. They saved a lot of Yuans in doing so!

[steverodgers]

That second fuse is in series with the one on the rear panel. It had a 12 amp rating in my unit, where the fuse on the back was 10 amps. It's probably there to prevent someone from putting a large fuse in the rear panel holder and then blowing up their meter.

[ksfixitmangaming]

It will never be said that you are not brutally honest which is one of the reason I watch your videos ! I am what I would consider myself to be a minor hobbyist and I feel that I learn so much from you. I really think something that defines you as a " Hell of a guy" is your videos on your 2nd channel with your son. You take the time to also be a dad and it shows in him. Thanks for making your videos !

[tHaHxr]

Dave, that is not a cheap-ass fan, that is a proper delta fan, very reputable brand.

[wtmayhew]

The “extension” card slot on the back of the SDM3550A is for an optional SC1016 16 channel input scanner card. That is pretty nice if you want a system volt meter for an automated test rack without having to devote extra space to a separate multiplexer box.

I believe if you want GPIB capability, there is a USB dongle with the not surprising part number USB-GPIB that is compatible with the SDM3055A.

A closer competitor is the Keysight EDU34450A 5.5 digit bench multimeter. Of course the EDU34450A did not exist when this video was made. The Keysight is in a clunky digital oscilloscope packing format and it costs about 50% more than the SDM3550A. The construction quality of the Keysight unit is better (no spade lug connectors), so you do get something for the extra expense. Still, I would not throw the SDM3550A off my bench if one were to mysteriously materialize.

[electricsnut]

LOL cheap ass fan? Thats a top end Delta fan.... You seem to be prejudice towards the brand in the way you start the review. Wish they used decent caps though... Front end relays look great so it seems odd they would cheap out on the caps.

[krisztianszirtes]

It's kinda confusing to see that they have an EM shield between the transformer and the main board, but at the same time, there is a fan, something that is switching a coil and generates a changing magnetic field right above the processor

[chenxiyang]

The digital board and major layout looks identical to another Siglent test gear tear down you did before which is the "Siglent SDG2122X Arb Generator in EEVblog #805". You are right on what you said in that video on "They are using same digital board for different equipments" Perhaps similar reason also explains why they had two fan installation holes and they decided squeeze the screen cable like that since the metal work might also be the same or similar in many of their designs and they have to come out with a universal metal work design with lots of trade-offs to save the cost.

[TheAmmoniacal]

Did Eric give you a crate of Siglent gear for free?

[Moonblade]

Delta's are not cheap ass fans....

[DLover]

May I point out, here in Australia April 2024, the cost of the 34661 meter in the above comparison is *$2100* and that makes the Siglent a bargain.

[jonas.gruska]

Would be cool to see a how Rigol DM3058 (Rigol's 5.5 digit) stands in comparison.

[vencibushy]

Cheap ass fan? LOL That's Delta Fan! I have 15 years old Deltas and the still run like the day they were made! Never even oiled them!

[canadavey]

Beginning of the video... "looks and feels like a reasonable quality meter..." a few minutes later... "the first thing you notice about this is the cheap quality and feel of the metal..." I think Dave is great and all, but he usually turns his nose up at "cheaper" (cheaper in quotes because $600 for a Siglent bench DMM isn't cheap to me or a lot of others I'm sure) alternatives to the industry leaders. While I appreciate an honest opinion, try to keep in mind that some of us have a limited budget and can't afford a Keysight or Agilent and we would like to hear more positives rather than negatives about the "cheaper" brands.

[rvinothkmr]

Thumbs up for demonstration of dual display mode.

[mlbabineaux]

Threaded studs are for the optional attachment :)

[tubical]

It´s always nice to see Dave´s doing a teardown....! You could also tear down a MicroWave oven and i would be watching it...;)

[aaim]

Why does these cost more than a Siglent 200mhz scope?