So I've got a circuit that requires both 5V and 3.3V so I bought a 5V 2A AC/DC converter from a store, which I will add resistors to later for the 3.3V. Before I connect it to my circuit, I wanted to verify that the DC output was correct, so I plugged it in, dialed my multimeter like so:
For 20V max DC voltage. Then I attach the common to one of the contacts on the power supply (shouldn't matter which because I'll either get a positive or negative voltage) and the 10A "hot" end to the other contact. When I make contact, the power supply's LED, which is on when plugged in and not connected, goes out and I get a 0 reading on the multimeter.
What is happening? Is my setup correct? Should I add be adding resistance anywhere? Is the multimeter pulling too many amps? Do I need a different multimeter? What is the best way for me to test my 5V 2A DC power supply?