Build quality looks somewhat reasonable... but whats your verdict, is it any good?
If you understand psu limitations, and limitations are adequate to your use case, then psu is acceptable.
+ Case is nice. It looks good and it serves as a big heatsink for semiconductors bolted on it.
+ Price is nice too.
+ Fanless.
+ Good efficiency.
+ Can adjust voltage/current with output off. Some poor psu lacks even output on/off switch.
+ LED display.
+ Compact.
+ Lightweight.
+ No severe AC leakage.
+ Capacitors look adequate (Samxon 105°C).
- Ammeter on my unit is not working correctly below 0.3A. I asked manufacturer about that. At first they replied:
"
Your CPS-3010 is not dfective, it can not show the current below 0.11A because the current meter display error." In next email, they corrected themselves: "
Sorry! i mislead you, i have checked some CPS-3010 in our warehouse, they all can show the current below 0.1A, your PSU can not show the current below 0.1A maybe the transpodrtation," They also provide calibration procedure.
Anyway, ammeter has 4 digits with fixed period position: xx.xxA. So, first digit is effectively useless. Experienced technician can use 1mA resolution to diagnose complex devices like laptops. This is not possible with this psu. Lower model CPS-3205 (CPS-3205L) has 3 digits ammeter, but can switch to mA resolution. I thought that CPS-3010 will be superior to CPS-3205, but turns out, 3 digits ammeter on CPS-3205 works better than 4 digits ammeter on CPS-3010.
- Some UI is on the back of psu (hard switch, output connectors), some UI is on the front. I don't find that ergonomic. Buttons are small and hard to press.
- UI is very minimalistic: no memory slots, no PC connection, etc.
- Manual does mention over voltage and over current protection: “
When OCP is triggered, MCU shut down the output and ammeter highlights “OCP””. Some psu (like Korad) have button for OCP which determines psu behavior when current meets user defined limit: either switch from constant voltage to constant current mode (drop voltage), or switch off output. Gopher switch to constant current mode. I have no idea why manual mentions output shut down.
- Psu is fanless, but not absolutely silent.
- Regarding spikes on hard power on look here:
https://www.eevblog.com/forum/buysellwanted/franky's-sales-thread/msg463182/#msg463182- LED display offers more contrast than LCD, but LED segments are not covered with tint film. Off leds are white and that decrease contrast in well lid environment. Could be fixed with tint film.
- Supplied leads are a joke and should be thrown away. Banana plugs are screwed through insulation (who cares about wire stripping?). Crocodile connection is no better: wire is wrapped through hole but not soldered. Wire itself is thin and does not match 10A. Output wires inside psu are thick 12AWG, no problem here.
- Capacitor on the output. This PSU is more constant voltage supply than constant current supply.
- Rubber feet are hard, more like a plastic. PSU slides easily. I glued some rubber on it.
- It't not possible to adjust voltage and monitor current at the same time. Power supply show set current while you adjust voltage.
Overall, PSU suits my needs, but I would be more happy with lower model CPS-3205, (CPS-3205L, CPS-3205C).