What am I doing wrong?
I got out my DMM to trouble shoot something, but I'm getting odd readings. I'm trying to measure the DC output of a 22.5V DC converter, so I set the DMM to read DC voltage and put the probes on the output (inside is positive for this one) and the reading doesn't change from the 30-60mv it reads when not connected to anything (it fluctuates).
So maybe the converter is bad, right?
Well, just as a sanity check I switched it to AC volts and checked the outlet. It goes from something under 5 mv (again fluctuating) when not connected to anything, right up to 365 mv when I stick the probes directly into an outlet, one in each of the straight slots.
So what's the deal? Bad DMM? User error? I've used this thing intermittently over the years so I sometimes forget what I'm doing, and I'm not the most electrically inclined person. But I don't remember having this kind of problem in the past.