Products > Test Equipment
Korad KA3005P power supply: UI changes
<< < (7/12) > >>
Geoff-AU:

--- Quote from: wasyoungonce on April 21, 2022, 07:41:09 am ---Have 2 re-badged versions of these.   One is very finicky in flicking voltage values up down when using the wheel to adjust voltage (adjst voltage of current).   It can flick up/down wildly with minor encoder wheel movement.   Its is extremely annoying.     Mainly noted when adjusting points of a volt/current.

I have 2 of them...the other is ok but a little twitchy like the first.

Its as if its not counting the encoder correctly or makes multiple jumps on one encoder click.  Going to have to try fix this....real PITA.

--- End quote ---

Replace the rotary encoder.  It's a bit of digging to access it but highly worthwhile.  The original encoder contacts go intermittent and that can cause all sorts of fun things, like trying to reduce the voltage and having it shoot up by 6 or 7 volts.  Certainly enough to fry a board if you are doing it "live".  I have the dual supply and replaced rotary on both sides, working perfectly again now.

LinuxHata:
Interesting, is it possible to extract firmware from the new version and flash it into old version?
By the way, I also have this PSU and did a "triple" mod, to make it far less noisy.
1. Fan is replaced with a far more silent version. Made by Nidec.
2. Fan is mounted onto silicone rubber padding, to reduce vibration noise
3. heatsink is not mounted on fan any more, so it can't transfer fan noise onto main body.

If anyone wants to skip all this and just have "Korad" grade PSU, but without noise, without short timeout and other issues, I suggest you to buy eTOMMENS eTM-305DP. It is basically same as this Korad, but has different fan management system (fan is off in most cases), fan is less noisy, and issue with knob timeout is solved too. Also, there's a service menu, which can be accessed by holding output enable button, while powering unit on. You can adjust beep on/off, calibrate meters and many other things from that menu.
Pfriemler:
Sorry for rehashing the thread....
Just got my KA3005+ from Welectron (the screw terminals are sold out by the way). These are my results from a first test:


* the Korad always starts with the settings in M1 (don't know if this is new or not).
* whenever you change a value after calling a setting from M1..M4, the corresponding M1..M4 LED stops lighting. The memory setting is not updated until I long press the Mx button
* A short press on [LOCK] still provides an easy way to change the voltage OR the current (whichever was set last), selecting the digit to be changed with <- or -> as usual.
The digit remains blinking, as long as the output is off.
If output is on, the blinking stops after a few seconds.
the digit to be set changes to 1/10V and 10mA if it was set to 1V/0.1A or 10V/1A. If the "cursor" was on 10mV/1mA, it remains there. This could be useful to avoid big changes by accident, but keeps possible small adjustment as long as this mode is active.
The dot in the most right digit blinks as long as this mode ist active.
Do I have a newer version? "*IDN?" answer is "KORAD KA3005P V5.8 SN:03203xxx" (dunno if the serial is secret)
edit: corrections of list, version information
edit2: correction of behaviour
ebastler:
Yes, that must definitely be a new version! The memory behavior you describe in your second bullet (long press required to store changes) implements a long-requested change. As stated in my original post in this thread, the version I received in April 2021 still changed the memory values as soon as you changed a setting.

I must say I'm impressed that Korad continues to listen to user feedback and make improvements to this older, low-cost product. (Although they are taking their time...)

The "always starts at M1 on power-up" behavior is unchanged from prior versions. The automatic jump to 1/10V or 1/100 A in "permanent adjustment" mode is new, I believe -- and I am not sure whether that one is an improvement?
Pfriemler:
eBastler* what's your FW version?
Yes, I was surprised by these news in behavior - it is as you will expect it, regarding the memories. And to store safe values to M1 is easy. I like it much more than returning to the last settings after power off. My Matrix MPS3206 is very special in this...

I think, the 1/10V as default is rather not that what most users will like.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod