Certificate of calibration from Manufacturer allowed?

Crusader

Trusted Information Resource
#1
I did not see this posted. Sorry if this is a repeat. I have some new Mitutoyo Dial Calipers with a certificate of calibration from Mitutoyo. It says it is traceable but is that little cert allowed per ISO rules? Or do I have to send the gages out to an accredited lab? TIA.
:confused:
 

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Eredhel

Quality Manager
#2
We send our standards out to be calibrated each year but verify/calibrate our calipers in house to those standards ourselves. When we buy knew ones we use the manufacturer's certificate but also check them to our standards just in case.
 

Marie Cavanaugh

Quality Systems Manage
#3
If you calibrate your calipers in house, ensure that the blocks you use are certified to NIST and your in house calibration document identifies 3 random measurements, as found.
Ensure that you check them quarterly if you do in house, If you send out they are good for a year.
Marie Cav
 

Eredhel

Quality Manager
#4
Are you just looking for ISO 9001? If so you can choose the interval for your calibrations, it doesn't require a set time.
 

Crusader

Trusted Information Resource
#5
We cannot calibrate in-house. No capability at all. I have never used these mfr certs as proof of calibration but in this case, at this time, I think I will.

Thanks for assistance!
:thanks:
 

Crusader

Trusted Information Resource
#6
Are you just looking for ISO 9001? If so you can choose the interval for your calibrations, it doesn't require a set time.
I am no referring to a set time. I am referring to accepting these mgr certs as evidence. Looks like it is okay.
 

Eredhel

Quality Manager
#7
If you're looking to satisfy ISO 9001 you're good to go. Your regular calibration/verification needs to happen but 9001 doesn't specify a required interval. If you don't want to have NIST traceable standards in house you might want to develop a relationship with a nearby shop that does. Sending those calipers out to be done later won't be cheap.
 

Crusader

Trusted Information Resource
#8
If you're looking to satisfy ISO 9001 you're good to go. Your regular calibration/verification needs to happen but 9001 doesn't specify a required interval. If you don't want to have NIST traceable standards in house you might want to develop a relationship with a nearby shop that does. Sending those calipers out to be done later won't be cheap.
I’m good with ISO and no problems with calibration in 4 years since registration thanks for your input but I as only asking about using a mfr cert in lieu of sending out to a calib lab. I usually ignore mfr certs that come with new gages send gages out to my local lab. But I’m feeling lazy and trying to avoid unnecessary spending. :rolleyes:
 

Hershal

Metrologist-Auditor
Staff member
Super Moderator
#9
I did not see this posted. Sorry if this is a repeat. I have some new Mitutoyo Dial Calipers with a certificate of calibration from Mitutoyo. It says it is traceable but is that little cert allowed per ISO rules? Or do I have to send the gages out to an accredited lab? TIA.
:confused:
Per ISO9001 perhaps. However, the usual cert, even from such companies at Mitutoyo, is not worth the paper it is printed on, and here is why.

To be a traceable calibration, there must be documentation of the next step up in the traceability, and stated uncertainties for each measurement. One other thing, the so-called NIST numbers are NOT valid for traceability, UNLESS they can be linked to the calibration of that specific standard used to calibrate the calipers with a specific date and uncertainty.

If that information is provided, then go with it. If not, send it to an accredited cal lab, accredited for that type of measurement.

Hope this helps.
 

Crusader

Trusted Information Resource
#10
Per ISO9001 perhaps. However, the usual cert, even from such companies at Mitutoyo, is not worth the paper it is printed on, and here is why.

To be a traceable calibration, there must be documentation of the next step up in the traceability, and stated uncertainties for each measurement. One other thing, the so-called NIST numbers are NOT valid for traceability, UNLESS they can be linked to the calibration of that specific standard used to calibrate the calipers with a specific date and uncertainty.

If that information is provided, then go with it. If not, send it to an accredited cal lab, accredited for that type of measurement.

Hope this helps.
YES! That is the answer I thought I was going to get...Thank you! I will send out the new stuff. :agree1:;)
 
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