posted 22 May 1999 10:07 PM               

Send me an email if you have further questions.

NOTE: This message was edited to HotLink the url.

posted 26 May 1999 04:43 PM               

quote:

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The assessor mentioned that we have to be able measure a standard with a device whose accuracy can be traced back to a national standard.

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The assessor is not precisely correct. Reference paragraph 4.11.2(b), which states, in part "Where no such standards exist, the basis used for calibration shall be documented."

quote:

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As long as we are only over/under a foot per thousand that is acceptable to our customer.

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That may be true, but you must have objective evidence that the measurement device meets this criteria, assuming the criteria is a documented one.

Now, the details. What does the manufacturer's manual state in terms of accuracy? Is there a statement in the manual that reads 'this counter is accurate for x number of uses or years' or something to that effect?

Check with the manufacturer. They may be able to help further. For example, the manual for one measurement device I use reads '·guarantees gage accuracy as long as the dial needle remains within the zero indicator when not in use.' A statement of this type should be acceptable objective evidence. In this case, the basis used for calibration is documented by the manufacturer's statement.

Regards,
Don

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