The only reset I saw on my DP832 was last month. Ch1 and Ch2 were in parallel (through a double diode, in order to charge a car battery). Both channels were set to 3A/18V each, while constantly logging the outputs values using SCPI commands over LAN (once a minute).
I was just increased the current from 0.3 to 3A (manually, on each CH1 and CH2 so the total generated power was under 85W), then after about 5 minutes at 80W, it reset under my eyes. After the reset, all the channels were in stop mode.
I couldn't reproduce the reset, so I let it charging the car battery over night at 2x3A and SCPI logging over LAN, and it didn't reset any more. Also, no other reset that I know of since I bought the DP832 about 2 years or so, but it was used only rarely, and usually for very small loads (1-10W for all 3 channels added).
I suspect the reset has something to do with the fact that SCPI commands were sent (for data logging) while manually changing the current from 0.3 to 3A. I am saying this because the last DP832 logged (in the PC) was at 0.3A, but the reset happened a few minutes later after the current was increased from 0.3 to 3A, so I should have seen a few records in the log at 3A, but there are no records logged at 3A. These are the last 3 records in the PC log:
YYYY-MM-DD,HH:MM:SS,CH1(V),CH1(A),CH1(W),CH2(V),CH2(A),CH2(W),CH3(V),CH3(A),CH3(W)
...
2016-10-30,01:19:25,12.5654,0.3993,5.017,12.5716,0.3947,4.962,0.0000,0.0000,0.000
2016-10-30,01:20:25,12.5648,0.3993,5.017,12.5711,0.3947,4.962,0.0000,0.0000,0.000
2016-10-30,01:21:25,12.5644,0.3993,5.017,12.5706,0.3947,4.962,0.0000,0.0000,0.000
During all this time, a DMM was also logging the battery voltage and current. The multimeter logged a few minutes between the manual current increase and the reset, but these minutes are missing from the DP832 log, so I guess it was like this:
- DP832 generating under 10W while logging the data into PC
- manually change the current (from the DP832 front panel) for CH1 and CH2 from 0.3A to 3A
- the software hang, because I have no 3A records
- after a couple of minutes, the DP832 reset. During these minutes, the DP832 was generating less then 100W, and the current was stable, and at the expected (as shown in the DMM logs).
I don't know where to look for the firmware version details. The 'Utility' -> 'System' shows 'Digital version: 00.01.11'. The hardware is the version with a big radiator (the radiator can be seen through the air holes).
This is what the DMM was logging. The blue cross is marking the DP832 reset. After the reset, all the DP832 were off. The charts shows the same values before and after reset because I manually turned on the DP832 channels after the reset. The various steps in the charts are because the current or voltage were manually adjusted in the DP832 a few times during the whole battery charging.