Reply to post: Re: Basic QC

Just because you failed doesn't mean you weren't right

KA1AXY

Re: Basic QC

I was once at a well known testing lab, and our product failed their mains leakage current testing (which it shouldn't have). We asked them for the data on the test equipment used, and they produced the manufacturer and model number. I found one on eBay cheap, and purchased it.

Using it (as received, i.e.: uncalibrated) to test our gear, I came up with the same numbers the testing lab had. After scratching my head a bit, I went back to the IEC spec and read the paragraph on the test, which helpfully provides a test method using a simple test circuit and a meter. When tested using the recommended setup, we easily passed.

Moral of the story is, of course, "don't trust it just because it has an LED readout and a computer inside"

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