how to test the electronic parts that bought

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when i buy electronic parts ,i dont sure the quatity ,how i ... - Aug 02, 2018 by Jotrin Electronics

Yourself , well you can test whatever attributes the devices... - Aug 02, 2018 by Spoiltforchoice

I remember once working for a company that got caught during... - Aug 02, 2018 by sarason

thank you for your anwser ... - Aug 03, 2018 by Jotrin Electronics

Jotrin Electronics

#80823

how to test the electronic parts that bought | 2 August, 2018

when i buy electronic parts ,i dont sure the quatity ,how i to test?

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Spoiltforchoice

#80826

how to test the electronic parts that bought | 2 August, 2018

Yourself , well you can test whatever attributes the devices should have to see if they align with the specification. You can inspect the packaging and markings to see that they match those of the manufacturer. You can also check if the parts have valid CE or UL certification You can inspect the device itself for signs it has been used before or indeed has previously been through an inspection process - e.g has anyone written on them with a marker pen. And if they are valuable you could also look at sending them to a specialist. However if you are suspicious of your parts you should not be dealing with that supplier.

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sarason

#80831

how to test the electronic parts that bought | 2 August, 2018

I remember once working for a company that got caught during a supply shortage. Yes they were meant to get several hundred Opamps a day from there supplier. but the manufacturer fell short some 20,000 pieces. Anyway the supplier scoured the world and thought they had gotten some valid parts. When we got them the package was right the date codes were a few years old. This as we expected as they were surplus.(Well that's what we were told). We built 4000 pieces. Sent them off they were put in there machines and didn't work as well as expected. It turned out that the Opamps were substandard parts with a higher than expected noise figure something that was not normally tested for in manufacture. The moral of the story is that it is easy to be caught with parts that you think are genuine. The part ran on the automatic test jig. Showed the correct gain in circuit! The one thing that could not be tested by the jig was noise performance!

sarason

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Jotrin Electronics

#80835

how to test the electronic parts that bought | 3 August, 2018

thank you for your anwser

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