ODP3032 - Experience? - Page 1
Forum section: electronics / testgear

author: con-f-use
author_rank: Unknown
timestamp: September 17, 2013, 02:34:40 pm
content: Did anyone here use/open an Owon ODP3032? If so would you recommend it? The stats look perfect for my purposes.

author: hankee
author_rank: Newbie
timestamp: January 15, 2014, 09:18:16 am
content: Nobody?I am also interested in this product

author: aflex
author_rank: Contributor
timestamp: January 15, 2014, 10:08:20 am
content: I suggest you should go for it. The features and specifications are too good to say a NO to this. Also, what is the primarily need for this.

author: ielektros
author_rank: Unknown
timestamp: March 10, 2014, 09:57:02 am
content: Here is some photos.https://www.dropbox.com/sh/z2uoovvaysdciyk/cxIdf0YRvKSome photo from last year and made with phone cam. But today I made some new with a bit better resolution.The display has horrible viewing angles.... The built in LCD type is ACX503AKP-7 339A41DI like this PSU but the FAN controlling make me crazy. That have a "noise" in standby if no load on outputs.On a dropbox link a folder too the name is "fan control". There is some pictures. Looks like without load the FAN get only 2,7V effective. And a crazy controlling signal... That is 1kHz "something". Thats why the fan have this stupid "beep" tone. Sorry because of my english...The FAN noise problem is solved. Added 330nF between the TIP42C and the other transistor. See on the picture. Now till the output load not over 150mA, the FAN stay stopped. Over 200mA start to work. That is better for the TIP42C too because the transistor was really hot.Dangerous "bug".If I turn the PSU to paralell mode (30V 6A), than just I see 14.28VDC on the outputOf course the outputs are turned OFF! First I thought that is some "fake" voltage from somewhere but, there I see 10.22mA too. Without stop and every time in paralell mode. This is really a bad joke.Uploaded some photos to "paralell bug" folder.

author: con-f-use
author_rank: Unknown
timestamp: March 10, 2014, 02:07:14 pm
content: Awesome. Thanks for sharing!

author: hankee
author_rank: Newbie
timestamp: March 10, 2014, 07:38:40 pm
content: thank you very much330 nF also works ok hereparallel bug gives 4.6 Volt @ 2.1 mA

author: ielektros
author_rank: Unknown
timestamp: March 10, 2014, 08:31:42 pm
content: Quote from: hankee on March 10, 2014, 07:38:40 pmLooks like I´m not aloneThat was really a irritating noise for me a whole day. I don´t turn it on and off every half hour. But I really don´t understand the thinking behind, because before the 330nF the FAN does not spinning without load. Only the coils generated noiseWhat is your opinion about the paralell connected bug? If I have bit more time I want to check a little bit better. That is really dangerous with sensitive mA range engineering. If I turn OFF the output, that must be really OFF. 4-10mA 4-14V is not acceptable.

author: mhlvos
author_rank: Newbie
timestamp: July 12, 2014, 04:12:48 pm
content: I just got this thing and with sv 1.9 and hv 1.8 I don't have this weird voltage on output while output is switched off issue. Further I did some measurements on the start-up voltage without load and with load. And the start-up behaviour is very nice. No overshoot. But if you put a constant current load on the power supply near its maximum capacity chances are the start-up behaviour is not so pretty. On the other hand a resistive load works fine with max load. The 5 volt is in my case not really 5 volt. Under loads up to say 500 mA it is but above that the voltage raises slowly to a certain maximum. Mmmmm. The normal outputs don't suffer from this 'feature' let's call it power line voltage drop compensation :-). So other then some weird behaviour of the 5 Volt and start-up behaviour with max constant current load it works perfectly. I am not sure how other PSU behave with a max constant current load during start-up. They might show the same behaviour. Does anyone have information about this PSU like a maintenance manual or a schematic?Update: I contacted Owon about the 5 Volt problem and they where very helpful. 2nd of October they sent me a replacement PCB with the problem solved.

author: nakunda
author_rank: Newbie
timestamp: January 06, 2015, 03:04:51 am
content: Quote from: mhlvos on July 12, 2014, 04:12:48 pmhi,are you able to provide the sv and hv of the new pcb you received?thanks

author: mhlvos
author_rank: Newbie
timestamp: March 02, 2015, 10:39:49 pm
content: Quote from: nakunda on January 06, 2015, 03:04:51 amThe only change made to one pcb was a different potentiometer as far as I could see. No sw changes. It seemed a bit overkill for me to send a complete pcb when I could have replaced the pot.

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: October 19, 2015, 06:51:18 pm
content: How is the experience with the powersupplay so far?

author: Arielo
author_rank: Newbie
timestamp: February 03, 2017, 03:35:35 pm
content: Quote from: ielektros on March 10, 2014, 09:57:02 amHello, I'm sorry to bother you, but I'm interested in buying this PSU, and it would be nice to see some photos of the teardown, but your link doesn't seem to exist anymore. Could you please update it?Thanks.

author: garboui
author_rank: Regular Contributor
timestamp: February 09, 2017, 12:59:55 pm
content: I bought this same supply about 2 years ago. It did the job and with reasonably clean power and load stability. However I did experience the cheap supply turn on spike. The solution to this was to turn on the PSU, use the soft buttons to disable the channel, connect DUT then enable channel. The current readings on the display were only reasonable accurate for currents >150mA. The transformer had a hum that varied at random (with or without a load) which was mildly annoying.

author: AlphaRomeo
author_rank: Contributor
timestamp: April 24, 2017, 09:41:42 pm
content: I've used a little more the power supply, so here is my experience. I have done the “brutal test” (per the manual) by shorting with a wire the outputs, the power supply recovers very quick. I have done this at a different voltage and current levels. No issues here.PROS:1-Very clean power outputs, my DMM does not indicate any AC noise. The scope indicates some noise at a very low level.2-All three power outputs do not share grounds, they are floating grounds.3-There are 4 modes of operation: series, parallel, independent, and plus-minus. In the “plus-minus” mode you set it up let’s say -3V and +3V, the output will swing between -3V and +3V volts. In this case, it can be wired as a bipolar source to test a system in which independent positive and negative supplies are needed, or some other investigative projects. I really like this.4-It remembers the power level you set it up after is power off and on again.5-Nice color LCD display, not the best but way much better that an old-fashioned LED type.6-It does not use a toroidal(donut type) transformer that we see on most power supply, this one uses the EI type. There are pros and cons about them, but I think the EI type is much better.CONS:1- The fan is very noise, with not load is kind of quiet, but as soon as a load is applied, it becomes very loud.2- The modes listed above the way they are indicated on the display is confusing. They are shown by some tiny icons on top of the display that you need to either memorize them or keep the manual next to you. They better do some work here.3- The sound produced by the buzzer is very annoying. It sounds like a cheap toy. I turned it off right away, still makes the beep when is power up.4- The buttons do not work the way you may expect, sometimes you need to press them more than once, that kind of details. Not really the best keypad.5- The two variable outputs are not dual-banana compatible. The green jack which is the AC ground is in between the – and +, so is the fixed 5 volts output, it is not dual-banana compatible. These guys were smoking weed when they designed this thing. This sucks!6- The Amp meter minimum current indicator is somewhere 150mA, less than this you see nothing, a blank display. The same is for voltage. The minimum voltage indicated is about 4mV. My DMM sees 1 mV output, but the display will not show that until the voltage is set to somewhere 4 mV.7-The front and back covers are plastic, but the sides are metal.Over all is a good power supply, so far so good, and the price is right.

author: ramin110
author_rank: Contributor
timestamp: December 08, 2017, 10:00:01 am
content: pls help guyshttps://www.eevblog.com/forum/repair/owon-odp3031-dc-power-supply-output-voltage-display-problem/