Products > Test Equipment
Siglent SDL1000X/SDL1000X-E Electronic Load
electr_peter:
On DC load screen there is a word "sense" in the top row. Can you check if sense terminals are enabled? If yes, then DC load would show 0V but still correctly sink current. Disable sense function if not needed.
Johnny B Good:
In that case, it would be a fatal flaw foolish mistake (it's only fatal in the case of power supplies blessed with such remote sensing capability) if the design hadn't included internal bridging resistors (one to ten K each?) between the load and sense amp connections.
I have an SDL1000X-E 200W (upgraded to 300W). I've never had cause to use the remote sensing feature so remain blissfully unaware of the possibility of such a design flaw and ICBA to test it out for myself. I'll leave that test for OP-SEC to try out and satisfy for himself whether that had been the problem in the first place. >:D
electr_peter:
--- Quote from: Johnny B Good on July 03, 2024, 11:40:45 am ---In that case, it would be a fatal flaw foolish mistake (it's only fatal in the case of power supplies blessed with such remote sensing capability) if the design hadn't included internal bridging resistors (one to ten K each?) between the load and sense amp connections.
--- End quote ---
No, it is not a mistake. It functions exactly as described, many other DC loads do the same. There are other ways to integrate sense lines with main terminals, but there are implications to accuracy/complexity.
You may be confusing DC load sense with DC PSU sense, these are slightly different in function.
Johnny B Good:
Having considered your insight into this issue, I guess this choice of not providing internal resistor links to the sense amp, as is standard practice with PSUs, is simply to assure the user that the external sense connections are properly connected when this option has been selected.
It hadn't occurred to me as to why such internal resistor connections would be omitted in the case of an electronic load. I still can't be bothered (at least not right now) to test this out for myself. Hopefully, OP-SEC will do this test with the replacement just to satisfy curiosity and post his result. >:D
martin1959:
Some weeks ago when I tried to update firmware from V1.1.1.23R1 to V1.1.1.23R2 the update failed with "Host update failed by udisk!" (using 1GB USB-Stick and filename SDL1000X_1.1.1.23R2.ADS).
Today I retried it with some different strategy and this time the firmware update WORKED:
- renamed the ADS file to 8.3 character MS-DOS compatible name "SDL1000X.ADS"
- ADS file saved to root directory of the USB-Stick
- using different USB-Stick, 8GB Sandisk USB-Stick, FAT32 format
- I found that the cluster size was 16384 bytes (instead of the 4096 bytes recommended by Siglent)
I think that renaming the ADS file to the short 8.3 filename and saving it to the root directory was the trick to make the update work.
I don't know whether the FAT32 cluster size in this case did make a difference or not. Normally I would go with the 4096 bytes recommended by Siglent, but I used that Sandisk 8GB USB-Stick out of the box and only afterwards checked the cluster size.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version