New Rigol DC PSU's

[grenert]

The problem I see is that the two main supplies are not isolated. In some applications you want isolation. The Rigol does not appear to have this since they share the same ground.

That seems to be pretty common/typical for triple power supplies (even Agilent, etc.).  Dual supplies are usually isolated.

[Bored@Work]

While I too think its ugly, it may set a trend in design; only the Rigol looks like this so far, and you never know what young EEs find appealing these days, it seems to have kawaii or Fisher Price written all over it.

I fear we are bound to see a Hello Kitty special edition in the near future.

[tom66]

*cough*

[rbola35618]

Quote from: rbola35618 on Today at 03:06:22 PM
The problem I see is that the two main supplies are not isolated. In some applications you want isolation. The Rigol does not appear to have this since they share the same ground.

That seems to be pretty common/typical for triple power supplies (even Agilent, etc.).  Dual supplies are usually isolated.

That is why I am interested in the BK 9130. All three sypplies are isolated.

RB

[SeanB]

Agilent Tiny Tots meters....... Get them young and they will be users of your product for life...........

[olsenn]

The problem I see is that the two main supplies are not isolated. In some applications you want isolation. The Rigol does not appear to have this since they share the same ground.

I think you're wrong about that. Both outputs (and all three with the tripple output model) have their own seperate positive (red) and negative (black) terminals and in the middle there is a green physical ground terminal in case you wanted to ground any of the outputs to earth. Why wouldn't there just be the one negative terminal if all the outputs used the same ground?

[grenert]

The problem I see is that the two main supplies are not isolated. In some applications you want isolation. The Rigol does not appear to have this since they share the same ground.

I think you're wrong about that. Both outputs (and all three with the tripple output model) have their own seperate positive (red) and negative (black) terminals and in the middle there is a green physical ground terminal in case you wanted to ground any of the outputs to earth. Why wouldn't there just be the one negative terminal if all the outputs used the same ground?

Olsenn, you should probably look again.  There is one black common ground terminal between the + and - outputs.  Indeed, that is why they are called + and -.  If they were isolated, there would be no + and -, since they could both be + for example.

[olsenn]

Olsenn, you should probably look again.  There is one black common ground terminal between the + and - outputs.  Indeed, that is why they are called + and -.  If they were isolated, there would be no + and -, since they could both be + for example.

I'm confused; looking at the photo, I see for the first output a yellow plus sign and a yellow minus sign. For the second output, I see a blue plus sign and a red minus sign. In between the teo outputs I see a black physical ground symbol which indicates that that (green) jack is connected to physical ground. Honestly though, I don't see what the black "com" jack is doing in between the plus and minus terminals of output #2?

[olsenn]

Nevermind, i think I figured it out; there is actually a third output on this one that is for a negative voltage. The com jack is the return path for both outputs 2 and 3.

[EEVblog]

Well, having seen that one the new Rigol suddenly doesn't look so bad anymore.
I can't really say what's wrong, it just looks ugly 

Yeah, but it's cheap!

Dave.

[thmjpr]

Personnally, I think I like the BK 9130 triple supply better than the Rigol power supply. It goes to 30 volts  (Rigol 25V) and can go up to 3A (Rigol 1A).
Does anybody has experience with the BK 9130?
Robert

There are some pictures here: https://www.eevblog.com/forum/chat/tektronix-or-bk/

[thmjpr]

Three models in the alibaba link, comma for isolation:
DP832A = 30V 3A, 30V/5V 3A
DP832   = 30V 3A, 30V/5V 3A
DP831A = +/-30V 3A, 8V 5A

There is a small black line drawn between 30V and 5V ground jacks, indicating connection.

DP832A/DP831A are $740-770 (close enough to $849 for DP1308A in NA)
DP832 is $415 (so maybe $500 for NA)

The 832 has either red or green monochrome LCD depending on which sellers pictures you look at (taobao). I don't see any other differences in specs/features, kind of surprised that only color LCD would add $300+ to the price though.

DP832 seems like it could be a good deal.

[Bored@Work]

The 832 has either red or green monochrome LCD depending on which sellers pictures you look at (taobao).

The images you attached are all photoshoped. Check the position of the power switch. Not unusual, but just saying reality might be rather different from the images.

[tom66]

So, why would you want to get the +/-30V/2A over the +30V/3A x 2? Guess it costs less? Perhaps the second one can't sink current well, but the first can?

[thmjpr]

So, why would you want to get the +/-30V/2A over the +30V/3A x 2? Guess it costs less? Perhaps the second one can't sink current well, but the first can?

Good point. The cost is almost the same. The only thing I can think is that 30V/3A x 2 might not offer a tracking setting, which would be annoying.

DP800 series info is accessible if you go to www.rigol.com and select Chinese, then you can find it under power supplies (use Chrome for translation).
If you compare DP832 vs 832A, the cheaper model lists LAN/GPIB/IO as optional, 10mV resolution (optional 1mV) and monochrome LCD. So that explains the large difference in price.

I wonder if these are all software upgrades?

[poorchava]

Here we have a new class of lab equipment design: HIPSTER LOOK.

There is only one thing i have to say about those design: ZOMGWTFROTFLOLBBQ->facepalm.

What is next? HannaMontana oscilloscope? Unicorn-shape scope probe? Dusk-saga soldering iron? Dragon-like hot air station? This world is doomed...

[EEVblog]

What is next? HannaMontana oscilloscope? Unicorn-shape scope probe? Dusk-saga soldering iron? Dragon-like hot air station? This world is doomed...

I can't wait for Hello Kitty myself 

Dave.

[nctnico]

Metrix (a French test equipment company) already took a stab at that:

The display can be lowered into the casing.

[termi]

@ rbola35618

I have the BK 9130 since about two years, and am very happy with it. The possibility to have serial/parallel connections has come in handy quite a few times.

I have previously posted pics in this thread: https://www.eevblog.com/forum/chat/tektronix-or-bk/15/

[Spawn]

What is next? HannaMontana oscilloscope? Unicorn-shape scope probe? Dusk-saga soldering iron? Dragon-like hot air station? This world is doomed...

I can't wait for Hello Kitty myself 

Dave.

Specially made for you Dave, enjoy!

[Bored@Work]

Specially made for you Dave, enjoy!

I just reported you to the moderators and Amnesty International for causing incredible pain. And now I am going to cut myself.

[Spawn]

Specially made for you Dave, enjoy!

I just reported you to the moderators and Amnesty International for causing incredible pain. And now I am going to cut myself.

lol 

[SeanB]

I'll take 3 of those...............

[Jad.z]

I wonder what the Easter egg would be on that one 

[senso]

I think that something like that with a pink UI would sell like hot cakes