Dear EEVbloggers-
I've got some HP 6632B 2 quadrant DC power supplies that I'm using to test some coin cell Li-Ion batteries.
I've noticed that when I connect the S+ and S- sense terminals to measure voltage across the battery, the supply begins sinking current (about 3 mA). I've left the supply power terminals + and - disconnected.
Does anyone have an explanation for this? I assumed that the "sense" terminals only measured voltage and didn't pass this much current.
Thanks!