What I found out is that if I have channel 1 voltage at 0.00 I can nor adjust channel 2 in any way. Getting the adjustment up to 0.01V in CH1 then I can adjust CH2 :-) I know it is nonsense not to have something adjusted but it happened by pure curiosity that I found it out. Same happens with the current adjustment.
regards Rainer
Thinking back, I believe this is one of the bugs I reported to Korad.
The other gotcha I noticed on older manufactured units, is if you have the power enabled, turn off the unit, then turn it back on it will still have the power enabled.
UPDATE: Its been a while using this one since I own 3 different 3 channel PSU’s. But I just remembered on this newer model it wasn’t a bug. Channel 2 is the master by design. So if channel 2 it turned off all the way it cuts any power going to channel 1. I know this is sort of backwards, I would of rather they made channel 1mthe mater, but they didn’t.
Still I have 2 of these, the one older 3 channel and they are all still running as expected.
Note: I did have a fan go out on my older unit, well it didn’t stop all the way, just made some weird bearing noise sometimes when I turned it on. So I want to mention if you ever replace this fan on the older 3 channel units, it’s a 24V fan, not a 12V fan like a regular common computer fan.
So watch out for this, I thought the bug you mentioned was corrected the same time that the power staying on was corrected. It’s possable you might have bought old stock, or a refurbished old unit they sold to you?
The opinion on the power bug is mixed. Some people like this and consider it a feature because if the main power goes out when taking long time lapsed measurements on a project, then the unit continues to put power out to,the DUT when the mains power is restored. This only works of the logger is battery operated. I don’t know if a mains powered logger would continue taking measurements if the mains went out, this would depend on the logger unit and it features.
I reported this because I considered this a potential danger since the unit is capable of putting out 62VDC and 5 Amps, or 32VDC and 10 Amps, or 32VDC and 5 Amps depending if its running in serial or parallel mode, or how you have it wired at the time.
You might want to test this. Unfortunately it does not have the ability to update firmware, but was fixed and corrected with a firmware. You can contact Korad or your local supplier, sometimes they might be willing to just send a replacement board with the new firmware loaded on the chip. Its cheaper then shipping to them, but only request this, or attempt to replace the board if you feel comfortable wit something like this. It has a lot of capacitors and stored power that can be lethal or give you the shock of your life.
Scott