I'm a bit of a DIY electronics gumby. I bought a multimeter so I could test stuff, but not sure if there's something wrong with the meter or it's my zero experience with it that's causing weird readings.
It's kinda like
this one, but doesn't do temperature.
I set the meter to check DC voltage, V not mV, and clicked the range button so there were 2 zeros in front of decimal because I was checking for around 12-13.8V values.
There are 3 holes for the probes to plug into. I put the black one in the "com" socket, and tried the red one in both the "10A" and the "V ohm mA" one. No matter the combo, I could not get readings in the right ballpark of 13.8V when I connected the probes to the terminals on a 13.* regulated power supply turned on.
Any ideas on what I'm doing wrong?