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DL3021 to DL3031 Conversion Discussion

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electr_peter:
Successful conversion to DL3031A. Model number is shown as DL3031A, no bugs were noticed (did system reset before & after mod). Tested with 350W and 60A loads, all is fine. Thanks to @Pedrofabian for confirmation that hardware is the same for all DL3000 range :-+

To anyone interested in how to do the mod between RIGOL DL3021/3021A/3031/3031A models:

* turn on DL3000 load, make a system reset via menu, stick in prepared USB stick
* connect to DL3000 and open SCPI/serial terminal: via USB (Rigol Ultra Sigma or serial terminal) or via RS232(Rigol Ultra Sigma or serial terminal) or via LXI LAN (telnet or RigolBildschirmkopie)
* enter command "*IDN?" (without quotes, should show current model number - if not, something went wrong in step #2)
* enter command ":PROJ:SET MODEL,DL3031A" (without quotes, model number is from a set {DL3021/DL3021A/DL3031/DL3031A})
* enter command "*IDN?" (without quotes, should show new model number - if not, something went wrong with step #1 or #4)
* restart device, make a system reset
* enjoy :-DMM

tv84:
What about DL3051?

thm_w:

--- Quote from: tv84 on February 14, 2022, 09:35:29 pm ---What about DL3051?

--- End quote ---

Yeah someone please test.
There are 10 FETs installed, and then 6 empty positions available. So this would imply original spec of 300W, with all 16 FETs = 480W, close enough.

IRFP250 is easy enough to purchase, not sure about the opamp and other passive components. and if a recal is necessary. Or if they simply operate all these FET drive circuits in parallel, then maybe installing more has no effect on the software, its just a simply watt limit.

electr_peter:

--- Quote from: tv84 on February 14, 2022, 09:35:29 pm ---What about DL3051?

--- End quote ---
Tested DL3051A option. Model number changes (*IDN? -> RIGOL TECHNOLOGIES,DL3051A,DL...........,00.01.05.00.01)
On boot it shows error "Self-test error for OCP reference voltag" (after canceling error doesn't reappear until next boot).
Current ranges changed to 9/90A (compared to 4/40A or 6/60A), but max current limit remains unchanged at 70A (same as for DL3021/3031).
Max power setting increases to 500W (compared to 200 or 350W).
Other than that, seems to work, accuracy and functions remain unchanged.

So full mod to 150V/90A/500W DL3051A would require some work with FW (OCP reference?, max current limit) and HW (MOSFETs and driving circuitry).

Wintel:

--- Quote from: electr_peter on February 15, 2022, 03:34:18 pm ---
--- Quote from: tv84 on February 14, 2022, 09:35:29 pm ---What about DL3051?

--- End quote ---
Tested DL3051A option. Model number changes (*IDN? -> RIGOL TECHNOLOGIES,DL3051A,DL...........,00.01.05.00.01)
On boot it shows error "Self-test error for OCP reference voltag" (after canceling error doesn't reappear until next boot).
Current ranges changed to 9/90A (compared to 4/40A or 6/60A), but max current limit remains unchanged at 70A (same as for DL3021/3031).
Max power setting increases to 500W (compared to 200 or 350W).
Other than that, seems to work, accuracy and functions remain unchanged.

So full mod to 150V/90A/500W DL3051A would require some work with FW (OCP reference?, max current limit) and HW (MOSFETs and driving circuitry).

--- End quote ---

Can you get over 200W in CR mode with flashed DL3021 to DL3031A?

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