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Rigol DMM DM858 comparison thread

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bdunham7:

--- Quote from: csuhi17 on March 31, 2024, 05:53:59 am ---I'm starting to get the feeling that the bug above is going to be a hardware issue.
When cold, it is between 31V-41V, after warming up it is between 28V-36V. So don't take it apart, the warranty will still come in handy.

--- End quote ---

I'm guessing the front end is badly misdesigned and a clamp is drawing down the voltage before the autoranging can range up.  In addition, the clamp must be in a place that only the 1K surge resistor (or whatever they use) is between in and the input, thus the tens of milliamps of current draw.  There will be pressure to come up with a software fix for this and that will probably be ugly.  One heck of a product launch, Rigol!

shapirus:

--- Quote from: csuhi17 on March 31, 2024, 03:16:08 pm ---They didn't make a small door on the back for that fuse out of laziness or sloppiness...
The warranty sticker sucks, there's a plastic film on the top and some silvery stuff on the bottom, you can't pick it up in one piece, something like what's on a scratch card. |O

--- End quote ---
A soldering hot air gun (on the lowest temp setting and with great care) worked well on the sticker that was on my DHO804. Don't tell anyone.
(that sticker is really fragile though, that's true).

coromonadalix:
they could added an banana jack with an integrated fuse we can see on reputable brand  loll      but cost   ....

i would check the pinouts of the dmm chip to see and try to guess witch model it is  .... since it seem to be buffered on top ....

it is not a very precise meter for sure,  nor a fast one ??

when i start an 34410a,  it is ready to measure,    for sure letting it warm up is better,  but i don't wait after an NIX os to boot up  ...  nor some WinCE based ones too


Sure people may like all other related features,  but at the moment   Rigol need to redo some work and address the comments we make here

       

DaneLaw:

--- Quote from: csuhi17 on March 31, 2024, 03:16:08 pm ---They didn't make a small door on the back for that fuse out of laziness or sloppiness...
The warranty sticker sucks, there's a plastic film on the top and some silvery stuff on the bottom, you can't pick it up in one piece, something like what's on a scratch card. |O

--- End quote ---

These silvery warranty sticker,s will saturate into a "breach" visual layer, the moment you try to peel it off.
Though I doubt you would be out of warranty breaching it, but it likely also comes down to where you purchased it.

From Europe.. peel away, slice cut it, lay a dump on that sticker, and you' will still have the warranty.
If you still wanna peel it without visual indication. the best approach is alcohol to get the adhesive to take a rest.

csuhi17:
I ordered the DHO924S from China on aliexpress, which means the warranty is almost 0. :-DD
If I had ordered it within the EU, I think I would have sent it back and ordered a Siglent.

The DM858 and DG912Pro are both from Batronix.

The sticker for DHO fell off by accident, and with the other two I was already very curious if it was worth buying the more expensive version.
How to properly hack the DG800pro or, in the worst case, the DG902pro to the level of the DG922pro.

I hope they don't have a physical problem, only software problems, and I hope Rigol fixes it quickly.

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