While reading the other current thread on power factor measurements, I thought of my home brew power meter, that I use for very basic “on the bench” checks.
I bought a handful of these rail mount ABB energy meters ABB energy meter from Carl on the other forum and have been playing around with their adjustable alarm outputs.
They have quite a lot of information they can display, so I decided to mount one in a project box, with a short length of plug wire for input and a double plug as output, with two spring loaded cable connectors on the side, for low wattage testing.
Now I can basically measure the voltage, amps, wattage and power factor, for any piece of equipment I restore.