I have 5 DP832s in the lab but I never use them again due to them switching off by themselves. I did not buy them very recently, that's true, but those are not the very first units produced by Rigol either. Then, I switched to E36312A from Keysight... I took advantage of the low-current measurement... but those beast killed about 10 of my highly sensitive analog boards before I figured out the powering up issue. ...