Looks good csushi17 thanks for sharing..
You took the plunge on both DG912PRO & DM858..?
Whats your impression sofar?
Took a web-look at the different chip-markings your posted (as different) but my web-kungfu is weak sauce, so nothing popped up-
I think it could be.
https://semiconductor.samsung.com/dram/ddr/ddr3/k4b4g0846e-byk0/I don't know what SEC 322 ls SEC 319 can mean.
Yes.
I haven't tested them much yet.
This is my first serious instrument group in this category.
Before that, I used FY6800 and simple multimeters, Owon's 20000 count DMM.
The display is large and clearly visible and readable. Due to the flat design, it fits more easily on the table, and if necessary, I can take it with me because of the USB-C.
But it should be noted that this is much more vulnerable than a manual instrument.
The DM858 does not contain a fan and is quite quiet.
However, the back panel is the same as the DHO900, so dust can fall through the holes, only a thin plastic covering sheet was added.
I didn't notice a big difference in its accuracy, after being cold and warming up for several hours.
I have only used it to measure voltages so far.
I somehow managed to freeze it once, I don't remember what I did.
The flat design has two disadvantages, one is that you can easily lean forward if you pull the measuring cable, and the other is that it is difficult to plug it in, so it requires two hands.
You can see what it can do in the description, and as far as I can tell, it does.
The main reason for my purchase is its flat design, large display, and the hope that I can make loop recordings with it.
I mean when I record the change in voltage in smaller groups of, for example, 500k points for several days with the highest possible accuracy at 125 Read/s.
Unfortunately, this function is not included.
There is some kind of "Record" for the Histogram in the description, but it doesn't appear for me. It is possible that it is not yet complete and this function has been removed from it.
I hope Rigol will improve on it.
I can tell you after a short search that this is a very basic DMM in its class.
Someone wrote earlier that the DMM chip in it is not the best.
TruRMS is 8kHz and its accuracy in the measurement ranges is poor even at lower frequencies.
The DG912Pro has made a positive impression so far.
You can see his abilities in his manual.
There is no easy way to load your own wave yet, one forum member described the currently usable method, but it is quite fiddly and incomplete, if I remember correctly it cannot be parameterized.
I couldn't measure how accurate the 5,000,000,003 kHz 1,000.01V sine wave is, I don't have the right instrument.
It is easy to use, I managed it even after reading the manual.
However, now that it turned out that the 800pro and 900pro are the same inside, I'm a little saddened, but I'm also happy at the same time.
So maybe if someone buys the cheaper version and hacks it, they will be fine with it.
What bothers me is that the program is not on it like it is on the DHO800/900 memory card, so I can't make a backup of it.
For me, these two will completely cover my interests if I get the two things I'm missing.
If anyone has any questions or requests, I will be happy to answer them and test them.
Unexpectedly, I can't say anything else about the two devices.
+Its fan is horrible.