In-house calibration - Resource for calibration, adjustment of calipers, indicators

[janah214]

Does anyone know of a good book or resource for calibration and adjustment of calipers, indicators, etc? I have always had a tech. do this for me but, now that I swithched jobs I have realized that I really do not know what I am doing! I understand what the ISO standards are and I know that I need instructions. I don't know how to write instructions for this or exactly what documentation I need to show for in-house calibration.

I would like to think I am pretty knowledgeable about the ISO standards but, this is the one area that I am really lacking.

 

[Bob Ablondi]

Does anyone know of a good book or resource for calibration and adjustment of calipers, indicators, etc? I have always had a tech. do this for me but, now that I swithched jobs I have realized that I really do not know what I am doing! I understand what the ISO standards are and I know that I need instructions. I don't know how to write instructions for this or exactly what documentation I need to show for in-house calibration.

I would like to think I am pretty knowledgeable about the ISO standards but, this is the one area that I am really lacking.

Recommend getting acopy of Kennedy, Hoffman and Bond'c "Inspection and Gaging Six Efition (ISBN 0-831-1149-6.

Bob Ablondi

 

[Hershal]

The best work I can recommend is The Metrology Handbook, published by ASQ Press. It is for Metrology (aka calibration, the science of measurement) what the Juran reference work is for quality.

As for documentation, you need to keep the information on the gage blocks you use, along with the certificate number from the gage block's last calibration, and next due date. That provides the traceability information above your organization. You should become familiar with measurement uncertainty so that you know the errors involved with your calibration.

As for instructions, if you are going to do much calibration, join GIDEP www.gidep.org I think is the website, and you can access military (e.g. USN's NA 17-20 series) which are considered validated.

Another thought, if you do a lot of internal cal, is to consider seeking accreditation down the road for your internal lab. The accreditation is to ISO/IEC 17025. There are five accrediting bodies in the U.S. that are accepted currently, so talk to all, if that is an option for you.

Also, get a subscription to Cal Lab Magazine, the leading periodical in Metrology. www.callabmag.com

Hope this helps.

Hershal