Today I received one of the roughly $ 20 component testers. Checking it out and comparing capacitors I notices a big difference in a couple of them
I was using a Fluke 87, a LCR meter from China, an older component tester and the new component tester.
The first capacitor was a Sprague .06 uF 600V. Two China testers showed near the value. Within the 10% tollorence, The LCR tester showed it to be .08 and the Fluke as .1 uF. This is a new,but very old capacitor.
Next capacitor was a 20 year old no name of .068 of 50 V made with the Poly something dielectric. All meters were with in less than 10 %. Ok here. Same results with a newer one of .01 uF .
Next came a Silver mica. It is .01 at 600 V. Fluke shows up at .0150, LCR at .0120. Two component testers were close and in spec.
What gives with some capacitors checking like they should and some being way off, not just 10 % or so ? I ran the tests several times on each capacitor to see if maybe the leads were not making good contact and any other similar thing I may have missed like having my fingers across the leads.