regularjohn
Well-known member
So I'm finishing up a build, and I was going through my normal pre-power up tests. I went around the circuit checking continuity - to make sure it is where it should be and isn't where it shouldn't be - and I encountered something bizarre and I wanted to see if anyone might know what the deal is here.
When testing continuity between the DC voltage rails, I get a beep when the red probe is on the positive rail and the black probe is on the negative rail, indicating continuity. BUT, if I switch the probes so that the red probe is on the negative rail and the black probe is on the positive rail then there's no beep, indicating no continuity. I tried it everywhere I could access the voltage rails always making sure the probes weren't simply making bad contact, and it's the same everywhere. Also, with the red probe on either voltage rail and the black probe on ground I get continuity, but not vice versa. I thought continuity was non-directional. Anyone know what's going on here? Is my multi-meter f'd up?
Suffice to say, I haven't yet powered up.
When testing continuity between the DC voltage rails, I get a beep when the red probe is on the positive rail and the black probe is on the negative rail, indicating continuity. BUT, if I switch the probes so that the red probe is on the negative rail and the black probe is on the positive rail then there's no beep, indicating no continuity. I tried it everywhere I could access the voltage rails always making sure the probes weren't simply making bad contact, and it's the same everywhere. Also, with the red probe on either voltage rail and the black probe on ground I get continuity, but not vice versa. I thought continuity was non-directional. Anyone know what's going on here? Is my multi-meter f'd up?
Suffice to say, I haven't yet powered up.