On August 23, 2019 at 18:51, ShaferCustoms said...
Have you ever measured the voltage on a power supply(or battery) and it appears to be correct
then plug it in and it does not work?
The line is not showing a direct or maybe even a high resistance short
until a load is applied
You need a better test or meter
A DUT "Device Under Test" used to verify
the physical properties of the cable have failed
[Link: weetech.de]Sure- plenty of times- it indicates that the power supply is weak, a connection is bad or maybe hte regulator is bad, assuming it's a regulated supply. That's a good example of voltage, but nothing to back it up- it's like measuring the water pressure in a garden hose after closing the sprayer and then closing the supply valve- the pressure is still there, but as soon as you open the sprayer, it decreases and goes away.
So, use a megger or a battery and an incandescent bulb if you already assumed the wire is bad- that way, if it smokes, it's academic.
