Hi all,
since I got my DP832, I noticed the output was always a few mV off, as measured by both an external DMM and the internal ADC. That's still in spec but I got curious so I decided to script a sweep on Ch1 Volts to see the big picture.
The setup ran at cold ambient (~15C), so somewhat out of calibration spec but the overall shape of the curve is still similar to what I saw at higher ambient.
I don't have much experience with DAC linearity, but the result still surprised me. Ignoring static offset, there is still about 8mV of range in variation (in spec for the DP832), but I can't explain the abrupt changes, especially around 10V. I assume the plot is a combination of calibration curve-fitting and actual DAC response...
BTW, the DP832 internal ADC agreed in the general shape of the curve.