I got my DP811 calibrated, and the voltage output and measurement is within spec now.
but, when I toggle "sense", voltage output (externally measured) jumps between 2 values, is 1.8% lower when "sense off", but internal readings are the same. There's 0 load, and sense+ sense- is short to output +/- at the terminal.
- set: 1.000 V, meas 0.982 V
- set: 10.000 V, meas 9.819 V
- set 40V. meas 39.284V