Hi!
I'm making a "chinese corner" inside my serious lab just for FUN (and stupidity) and am currently choosing between the DMMs Siglent SDM3055 and Rigol DM3058E.
A quick look into the spec sheets revealed the exact same accuracy data (see pictures attached). Also many other wordings in those spec sheets are exactly the same (example "NMRR: 20 dB are added if open the AC filter").
This made me think for a moment. It's not random, obviously these are based on some common platform, either Siglent buys it from Rigol or vice versa, or they both buy it from someone else.
Looking at the guts of SDM3055 and DM3068 (see pictures attached, couldn't find those of DM3058), clearly there are many similarities.
I haven't found any information on this, does anyone have an insight?
I don't want to throw money around, just some OK precision for the best price possible. Unfortunately I prefer the Siglent (bigger display, better toy!!) which currently costs about 85 Euro more.
The SDM3045X ist just a bit too inaccurate, for about 20% (80 Euro) more I can get the DM3058E already which has 0.015% DCV accuracy instead of 0.06%, quite a big difference (even a toy has to have some accuracy, otherwise I will make it explode somehow!).
The additional 85 Euro on top would be just for the nicer display of the Siglent. Is it worth it...? Thinking.
Thanks!