Just got my new DP832 on my door step today. (Backstory - Ordered one, got it early November, Channel 1 failed after a dozen or so uses, RMA'd for replacement last week)
Ordered direct from Rigol NA.
Old one firmware = 1.06, new one = 1.08
Old one had the "middle design", new has the new PCB with the large aluminum heat sink.
Beating it up a bit right now, trying (not too crazy hard anyways) to get it to fail now rather than later... Gonna do this for a couple hours or so.
Got all 3 channels pushing 3 space heaters coils. Ch1&2 @ 27v @ 2.7amps, Ch3 @ 5v @ 2.7amps. About 160 watts.
Going over to the box every 10-15 minutes or so, switching it off, waiting a minute, switch it back on, and enable all 3 outputs at the same time (or as close to it as I can get).
Every 2nd or 3rd time, I'm waiting a minute after turning them on, switch all 3 outputs off, then right back on.
Got meters on the outputs watching volts/current. DP832's LCD and the BK2709's match up pretty good.
So far, so good...