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OWON ODP3063 Power Supply (First Impressions)

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wpwrak:
If I understand correctly what xbay wrote, the sqare waves were produced by turning the PSU output on and off. So that's just what one would expect to see.
The problem reported by yaqwsx sounds more severe. I guess a somewhat useful test would be to operate the PSU at CV with a reasonable load and then suddenly add a parallel resistor that drives the PSU into CC, and observe the curve with an oscilloscope. This should also show how big the output capacitance is.

Hergen Lehmann:
I've bought this supply yesterday - mainly, because the Rigol DP8xx is to deep for my shelf, the Siglent SPD3000 does not show channel3 measurements on the display, and the higher quality brands are way to expensive for my use case, which only occasionally calls for a digitally controlled supply.


--- Quote from: wpwrak on January 31, 2019, 09:57:40 pm ---The problem reported by yaqwsx sounds more severe. I guess a somewhat useful test would be to operate the PSU at CV with a reasonable load and then suddenly add a parallel resistor that drives the PSU into CC, and observe the curve with an oscilloscope. This should also show how big the output capacitance is.

--- End quote ---

In case someone is still interested in this matter:
With some reasonable load already present before and an additional load suddenly switched in, current limiting takes 10-40ms (depending on the amount of overcurrent) to kick in. That's not lightning-fast, but also not noticeable slow.
Of course, there will be an additional huge current spike due to the output capacitor, if the output was already active at a high voltage and a load is suddenly attached, as yaqwsx did. But this is to be expected.

A bit more worrying is the fact, that the current also overshoots, if the load is already present while switching on the output - the output voltage rises to the set voltage first, current limiting only kicks in with a slight delay.

On the positive side, the voltage itself nicely ramps up to the set voltage without any overshoot. The output also stays completely silent when turning the device on or off.

Side note: Don't try to remote-control the device using the english language SCPI documentation available at the OWON website. It does not fit this device at all. There is a better one at the chinese site (in chinese, of course, but i could at least realize how the commands are supposed to look).

karadagian:
Cant find the link for the chinese manual. Can anybody help with that? I need those SCPI commands!!!

Thanks!



--- Quote from: Hergen Lehmann on June 08, 2019, 12:13:58 pm ---I've bought this supply yesterday - mainly, because the Rigol DP8xx is to deep for my shelf, the Siglent SPD3000 does not show channel3 measurements on the display, and the higher quality brands are way to expensive for my use case, which only occasionally calls for a digitally controlled supply.


--- Quote from: wpwrak on January 31, 2019, 09:57:40 pm ---The problem reported by yaqwsx sounds more severe. I guess a somewhat useful test would be to operate the PSU at CV with a reasonable load and then suddenly add a parallel resistor that drives the PSU into CC, and observe the curve with an oscilloscope. This should also show how big the output capacitance is.

--- End quote ---

In case someone is still interested in this matter:
With some reasonable load already present before and an additional load suddenly switched in, current limiting takes 10-40ms (depending on the amount of overcurrent) to kick in. That's not lightning-fast, but also not noticeable slow.
Of course, there will be an additional huge current spike due to the output capacitor, if the output was already active at a high voltage and a load is suddenly attached, as yaqwsx did. But this is to be expected.

A bit more worrying is the fact, that the current also overshoots, if the load is already present while switching on the output - the output voltage rises to the set voltage first, current limiting only kicks in with a slight delay.

On the positive side, the voltage itself nicely ramps up to the set voltage without any overshoot. The output also stays completely silent when turning the device on or off.

Side note: Don't try to remote-control the device using the english language SCPI documentation available at the OWON website. It does not fit this device at all. There is a better one at the chinese site (in chinese, of course, but i could at least realize how the commands are supposed to look).

--- End quote ---

Tjuurko:
China
ODP 3通道电源SCPI编程手册
http://www.owon.com.cn/softdown/Application/ODP3CH_SCPI.rar

English
ODP Series Triple Output Power Supply SCPI Commands User Manual
http://files.owon.com.cn/software/Application/DC_Power_Supply_SCPI_Commands.zip

gby:
My ODP3063 supply started having trouble turning on/booting lately and today it refuses to start at all.  I hit the power switch a couple of buttons light up briefly and then nothing more.  Nothing on the screen ever.  So something in the control processor or control processor supply is not working.

Before trying to send it back for warranty repair I thought I would take a look inside to see if anything obvious is wrong.  However, I am stuck in getting it apart.  I
   1.  Took the back plastic panel off
   2.  Removed the 4 screws holding the upper metal body cover
At this point the upper metal body seems hooked to something hidden in the front under the front plastic panel.

Do you have to take the front plastic cover off to get to more screws holding the top metal cover?  If you do have to remove the front plastic panel where is it attached and do you have to remove more than just the single front knob to get it off?  Are there hidden snaps or screws holding the front plastic cover on?

I had hoped to use the first post tear down pictures to see what is going on but as of March 2021 they are no longer there.

Any suggestions from those that have successfully taken the Owon ODP triple supply apart?

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