I need to evaluate the build quality of 3rd party 120V AC -> DC 5v 1a wall wart type switch mode power supply/adapter. The supply is supposed to have over current and short circuit protections as well.
My question is how do I safely test all the specs are working as advertised?
I'm self taught w.r.t electrical engineering so I guess I'm looking for a sanity check on my approach.
My first test will be to hook the supply up to an adjustable current load so that I may check the voltage ripple (if any) with my oscilloscope. Nerve level on this test: 0 out of 10
Second, I will up the current load and see what happens approaching and above 1a. I will monitor the temperature of the supply while I do this. Nerve level on this test: 3 out of 10
Third, I want to test the short circuit protection, but just shorting the supply output to ground sets off warning flags in my brain. Nerve level 10 out of 10
Is there a safe way to test short circuit protection without damaging my equipment? Or, should I just plan for it to either a) work or b) fail catastrophically?