Hi
I got my DP832A Power Supply delivered. I did some inital tests and got the following results:
no load SET Readback Measured
CH1 1.0000 0.9840 1.0015
CH2 1.0000 1.0043 0.9993
CH3 1.0000 1.0012 1.0005
CH1 5.0000 4.9845 5.0020
CH2 5.0000 5.0023 4.9980
CH3 5.0000 5.0014 5.0010
CH1 30.0000 29.9872 30.0100
CH2 30.0000 30.0010 30.0000
while CH3 is bang on, CH2 is ok, CH1 seems to be fairly off. I measured with a Agilent U1241B and had a quick chat with Rigol support. Basically they said, the Agilent can not be used to verify the output and readbyk since it is way to unacurate, I would need at least a 6.5digit Multimeter. Asking if I just should recallibrate it they recommended not to recallibrate it since it could get worse.
So what would you do? Keep it and tweak it or send it back and hope to replacement psu will perform better?
CH1 is around 17mV off. If I set the output to 17mV, readbyck shows zero. At 18mV it flickers between zero and one mV. To me, it looks like an offset since this is allmost the same over the full range.
I like the device quite a lot, the hello-kittyness is not great, beside that, I measured the current readback which is absolutely bang on on all three channels, which also is very important to me.
Cheers
Linus