PS: Trick to get accurate current readings in the low 0~300mA is to calibrate iDAC and iADC with a good 30min delay in between. So:
1 - Run iDAC steps
2 - Pause 30min
3 - Run iADC steps
Another way is to take note of the unit temperature before the calibration (Utility > Sys info > key sequence 1-3-2) and run the iADC steps when it reached to about the same as when iDAC started. Took a good 30'ish minutes for mine to come back down to normal operating temp... which is about the same Rigol recommends.
Using those steps for all channels (current):
//CH1, CH2 & CH3 (iDAC iADC)
string[] iDAC = new string[] { "0.001A", "0.002A", "0.005A", "0.01A", "0.02A", "0.03A", "0.04A", "0.05A", "0.06A", "0.07A", "0.08A", "0.09A", "0.1A",
"0.2A", "0.3A", "0.4A", "0.5A", "0.6A", "0.7A", "0.8A", "0.9A", "1A", "1.2A", "1.5A", "1.7A", "2A", "2.2A", "2.5A",
"2.7A", "3A", "3.2A" };
string[] iADC = new string[] { "0A", "0.1A", "0.5A", "1A", "2A", "3A", "3.2A" };