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Comparator Calibration Requirements

#1
I have been investigating comparator calibration, only to find out that there is no industry standard which outlines acceptance criteria. I have asked comparator calibration companies, and they comment that nothing exists, and its up to you to determine acceptance. I understand that an R&R study can be performed to verify if it is an acceptable instrument for use in inspection, but what about gage tolerance? Does anyone know what is accepted as a tolerance for comparators? If know one knows, how can it be called calibration?
 
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Ryan Wilde

#2
You will have to give a bit more detail than "comparator". I can think of a few dozen different types of comparators off the top of my head.

Calibration is the comparison of an unknown to a known traceable standard. There is no tolerance. Tolerance does not come into play until you are performing verification. If you measured it, you calibrated it.



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Ryan Wilde, Technical Manager
Quality Control Sales & Services
 
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