NADCAP NDT (specifically RT) - Calibration of eye loupe reticle & optical comparator

#1
Hello All!

Dealing with quite a sticky situation here.

I'd like to know what NADCAP and/or ASTM E1742-12 requires for degree of accuracy of calibration of eye loupe reticule or optical comparators.

Both NADCAP Checklist AC7114/4 Rev. J and ASTM E1742-12 requires an initial calibration on a scaled reticle (our reticle has a thickness scale for observing anomalies and determining size).

My assumption is that NADCAP does not dictate a spec. but accepts OEM specs. I'd like to fact check this would you good folks.

I'd like to send a loupe and reticle out for calibration which has been used on RT but the loupe is so old I can't tell who the OEM is - no P/N, no S/N, etc. I've yet to locate any past cal certs. The loupe, of course has no product identification as well.

Thanks,
-J
 
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#2
Re: NADCAP NDT (specifically RT) - Calibration of eye loupe reticle & optical compara

"My assumption is that NADCAP does not dictate a spec. but accepts OEM specs. I'd like to fact check this would you good folks." - At the risk of sounding sarcastic (and I'm not trying to be) a phone call or e-mail to a Nadcap NDT Staff Engineer is the way forward. I'd use an e-mail as then you have a written answer to show the auditor if the item comes up for discussion during the audit.
 
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