Hi everyone
I've been looking at this forum for a long time now and I finally decided to post a message (yes my first one !!!
)
Can we believe a calibration certificate?
I recently bought a 8-1/2 DMM (Adventest R6581T) and I received a nice calibration certificate (only the paper is nice, not its content
, ...)
I suggest a good exercise for beginners in metrology, in the form of a small game: find the errors in a certificate.
This will exercise you on reading and interpreting the specifications of a DMM, on the method of calculating the different limit values and to be critical on tools used for a good calibration / verification.
To analyze this certificat, you will find the user manual on the xDevs.com:
https://xdevs.com/doc/Advantest/R6581T/R6581-manual-OCR.pdfOk, it's in Japanese, but it's also a good exercise to quickly find information in a user manual.
You will also find on xDevs a good article on teardown / repair of this DMM:
https://xdevs.com/fix/r6581t/(Please, for the experts, they will recognize each other, give enough time to beginners before publishing the solutions
).
Good luck ...
Sorry for my spelling / grammatical mistakes, I speak English like a Spanish cow and Google is my best friend / teacher for translation