Products > Test Equipment
New Siglent SPD4000X series power supply
sparky2024:
Thank you for swift replies.
Peter, I see a peak of around 22v with a voltage setting of 32v. This occurs identically with (img_3337) or without (img_3338) a high wattage 56 ohm resistor as load. Ref. picture.
Defpom, I see the same response (as img_3338) without applying the “soft” on button i.e. power-up with prior settings, and just power down with the main switch.
There’s a definite capacitor discharge, but the relay in my opinion is charging that capacitor for 75-100ms.
sparky2024:
Furna, my unit is running 4.1.2.8R1. As per another earlier message, my unit arrived with 4.1.2.6. I’ve been living in hope of a firmware fix for this.
Wondering if @tautech, or a Siglent rep is following this thread and may be able to comment on this?
I may be in touch with my distributor in the UK soon if all else fails.
Thanks to all.
electr_peter:
Potential issue with output turning ON with high voltage and high current capability if mains switch is pressed should be looked into more closely (Is it a single unit/early FW/defective component or design specific?).
With complicated multi-channel PSUs outputing a "blip" with mains turn-off is not unheard off, but that's not critical when voltage/available current is limited to safe levels by design. If not limited, PSU can kill DUTs.
Furna:
--- Quote from: electr_peter on October 23, 2024, 06:49:55 pm ---Potential issue with output turning ON with high voltage and high current capability if mains switch is pressed should be looked into more closely (Is it a single unit/early FW/defective component or design specific?).
--- End quote ---
I guess TheDefpom and tautech will help when they receive their units ... I understand sparky2024 might chose to return his unit.
--- Quote from: electr_peter on October 23, 2024, 06:49:55 pm ---With complicated multi-channel PSUs outputing a "blip" with mains turn-off is not unheard off, but that's not critical when voltage/available current is limited to safe levels by design. If not limited, PSU can kill DUTs.
--- End quote ---
I agree; also as I wrote a very simple even if annoying solution is to disconnect cables as an attitude at everty mains power in/off.
mawyatt:
--- Quote from: electr_peter on October 23, 2024, 06:49:55 pm ---Potential issue with output turning ON with high voltage and high current capability if mains switch is pressed should be looked into more closely (Is it a single unit/early FW/defective component or design specific?).
With complicated multi-channel PSUs outputing a "blip" with mains turn-off is not unheard off, but that's not critical when voltage/available current is limited to safe levels by design. If not limited, PSU can kill DUTs.
--- End quote ---
Any overshoot at PS Turn ON/OFF with the Output Enable Buttons and also to the Main Power Switch ON/OFF is of concern to us. A few decades ago we lost a couple of very expensive custom chip sets to a rogue PS that had a glitch at Turn Off, ever sense we have been extremely sensitive to such :o
Best
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version