Calibration of Pin Gages - AS9100 Calibration Requirements

J

jzubb

#1
I am new to the AS9100 standard I have pleanty of experiance with ISO 9001:2000 and For calibration of pin gages we always calibrated them before each use with know calibrated micrometers. Now with AS9100 I am being told I need to have these same pin gages sent out to a certified lab to calibrate them is this true? Any one with any insight in this topic I would greatly appreciate any information.
Thanks
Jon
 
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Al Rosen

Staff member
Super Moderator
#2
Re: as9100 and calibration.

I am new to the AS9100 standard I have pleanty of experiance with ISO 9001:2000 and For calibration of pin gages we always calibrated them before each use with know calibrated micrometers. Now with AS9100 I am being told I need to have these same pin gages sent out to a certified lab to calibrate them is this true? Any one with any insight in this topic I would greatly appreciate any information.
Thanks
Jon
I don't believe that to be so.
7.6 (Continued):
The organization shall ensure that environmental conditions are suitable for the calibrations, inspections, measurements and tests being carried out.

Where necessary to ensure valid results, measuring equipment shall

a) be calibrated or verified at specified intervals, or prior to use, against measurement standards traceable to international or national measurement standards; where no such standards exist, the basis used for calibration or verification shall be recorded;

b) be adjusted or re-adjusted as necessary;

c) be identified to enable the calibration status to be determined;

d) be safeguarded from adjustments that would invalidate the measurement result;

e) be protected from damage and deterioration during handling, maintenance and storage;

f) be recalled to a defined method when requiring calibration.


In addition, the organization shall assess and record the validity of the previous measuring results when the equipment is found not to conform to requirements. The organization shall take appropriate action on the equipment and any product affected. Records of the results of calibration and verification shall be maintained (see 4.2.4).

When used in the monitoring and measurement of specified requirements, the ability of computer software to satisfy the intended application shall be confirmed. This shall be undertaken prior to initial use and reconfirmed as necessary.
Where is that coming from?
 
J

Jeff Frost

#3
Re: as9100 and calibration.

First would be to review the requirements of AS9100B, Clause 7.6, Control of Monitoring and Measuring Devices as the standard only adds additional requirements of having a register (list) of M&MD and environmental conditions above what is required by ISO 9001:2000.

Aerospace customers impose quite a few additional requirements to what is required by AS9100B. Many of things referenced in the Note of this clause become requirements per the customer which can include:

• Calibration of M&MD only to specified calibration labs
• Traceability to national or international calibration standards
• Required accuracy ration of 4 to 1 or 10 to 1 to calibration standards
• M&MD Reliability target requirements
• Method of calibration

Also, if I remember correctly, if you not using a super mic or bench mic (hand mic won't do) for calibration you are not meeting the minimum accuracy ration of 4 to 1.
 
B

Brad Eickhoff

#4
Re: as9100 and calibration.

7.6 Control of Monitoring and Measuring Devices:
The organization shall determine the monitoring and measurement to be undertaken and
the monitoring and measuring devices needed to provide evidence of conformity of
product to determined requirements (see 7.2.1).
The organization shall maintain a register of these monitoring and measuring
devices, and define the process employed for their calibration including details of
equipment type, unique identification, location, frequency of checks, check method
and acceptance criteria.
NOTE: Monitoring and measuring devices include, but are not limited to: test
hardware, test software, automated test equipment (ATE) and plotters used
to produce inspection data. It also includes personally owned and
customer supplied equipment used to provide evidence of product
conformity.
The organization shall establish processes to ensure that monitoring and measurement
can be carried out and are carried out in a manner that is consistent with the monitoring
and measurement requirements.

I am no expert on this Jon but I do believe that you are right and so is Jeff.
You can either send them out or calibrate in house.

"Jeff Frost" Also, if I remember correctly, if you not using a super mic or bench mic (hand mic won't do) for calibration you are not meeting the minimum accuracy ration of 4 to 1.
. :yes:

We use a lazer mic to calibrate our pin gages (z-mike accuracy .00001). AS9100 makes calibration much tougher. You should see how many plug gages and thread ring gages we now have to send out for calibration. Not to mention calibrating the employee's gages too. We use to use "calibrate at time of use", on all floor equipment and just had some of the inspection lab equipment sent out for outside calibration.

I understand the purpose behind this but try convincing upper management about the extra cost, especially when in the last 10 years that I have been here they have never had an issue with these type of gages :frust:.

Regards Brad :agree1:
 
R

Russ Bloom

#5
Re: as9100 and calibration.

jzubb,

I am a certified Aerospace Experienced Auditor and have conducted well over 300 certification audits. You are correct in questioning strange interpretations that are not in the standard. The standard does not mandate any particular calibration method, whether in-house or in a cal. lab. An auditor is not supposed to mandate methods. It is a legitimate question to ask you, however is how you know that your method is effective. Micrometers only check one point on a round surface, so the issue is to ensure that you are doing this effectively.

Hope this helps. Keep questioning.
 
#6
Re: as9100 and calibration.

I am new to the AS9100 standard I have pleanty of experiance with ISO 9001:2000 and For calibration of pin gages we always calibrated them before each use with know calibrated micrometers.
Could it be because what you describe isn't calibration? Jeff is correct with his post. The best you can claim is some kind of verification of the basic size. But you're not capable of checking roundness etc. and the discrimination of a micrometer (unless, as Jef says it's a high res. lab. machine) isn't anywhere close.

Mr. Bloom is correct about interpretations, however, it seems to me that the external auditor was trying to be nice, but want to avoid the potentially explosive comment "that's not calibration........."

IMHO, you need to think this one through again. Maybe just changing your terminology and documentation references from 'calibration' to 'verification', unless you're really describing the act of calibration.......
 
J

jzubb

#7
Re: as9100 and calibration.

Jeff,
The hand held mics I would be ussing have an accuracy of ±.00005in wouldnt this meet the minimum accuracy ration of 4 to 1. I am ussing class zz pin gages.
Thanks
Jon
 
J

Jeff Frost

#8
Re: AS9100 Calibration Requirements - Calibration of Pin Gages

One point to remember about clause 7.6 is just because you say verification in place of calibration does not lessen the requirements contained within this clause. You must have the necessary calibration or verifications masters to detect that a Mic, Caliper, plug gage etc are either within the required accuracy or not when you perform the verification and that this process must be controlled conforming to all requirements of the clause.

ISO 9000:2005 (normative reference per AS9100b Section 2 & 3) defines verification as “confirmation, through the provision of objective evidence, that specified requirements have been fulfilled”. If the organization describes the processes in a documented procedure that reference one of the many calibration standards like MIL-STD-45662, ISO 10012, ISO 17025 or Z540 your calibration/verification process must also meet the requirements contained within the sited reference in addition to AS9100.

In summary your calibration or verification system for M&MD’s must meet the requirements of AS9100, customer imposed contractual requirements and the organizations own internal operational procedures.

PS. Yes I know that MIL-STD-45662 has been canceled but it still shows up as a contractual requirement in many government POs
 

Brizilla

Quite Involved in Discussions
#9
Re: as9100 and calibration.

Jeff,
The hand held mics I would be ussing have an accuracy of ±.00005in wouldnt this meet the minimum accuracy ration of 4 to 1. I am ussing class zz pin gages.
Thanks
Jon
What mic are you using that is accurate to .00005?:confused:
 

BradM

Staff member
Admin
#10
Re: AS9100 Calibration Requirements - Calibration of Pin Gages

For what it's worth, I am in total agreement with Andy and Jeff. I'm not suggesting it's required as a specification thing (I'm not an expert with the specification), but as a matter of good metrology.

If you are using these pins, you really want to have them verified by substantially more accurate equipment so as to pick up wear and tear. If you have acceptable verification methods, you can extend the calibration cycle.

Are you using the entire set, or just a few of them?
 
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