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Calibration Lab unable to issue Accredited Certificate when error is too high?

N

neoth

#1
Hi all,

is it true that a calibration lab is unable to issue a ISO 17025 accredited cert if the UUT is found to have high error or does not meet the manufacture's accuracy?

Thanks
 
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W

woodynz

#3
Hi

No not true

It is possible for a lab to issue a certificate - but a number of things are happening here.

Remember calibration, accreditation and manufactures's specs are all different things.

1. Calibration is about reporting what you find before and after adjustments. Has nothing to do with manufacturers specs.

2. 17025 Accreditation is about having your processes, equipment and people externally audited buy a accreditation body - again nothing to do with manufactures specs.

3. Manufactures specs well they do what they want to do.

So a lab can issue a endorsed certificate even if the results show a fail and those results are outside the manufactures specs - unless the calibration makes a compliance statement to some standard or guide.

It is up to the lab to report the results and then up to the customer to make a decision based on those results. But as I mention above if the calibration you are doing is required to meet a standard say like EN 837-1 and the UUT doesn't meet that standard then you can't say it does but you can still issue a failed 17025 endorsed calibration certificate. Saying it does not comply. But it is still a ISO 71025 endorsed calibration certificate. Pass or fail. Or even no statement about pass or fail.

But always a but - special calibrations may override everything I have said above - depends on the labs terms of registration and what they are able to calibrate and issue certificates on.

Make sense ?
 
D

dv8shane

#4
Hi all,

is it true that a calibration lab is unable to issue a ISO 17025 accredited cert if the UUT is found to have high error or does not meet the manufacture's accuracy?

Thanks
No it is not true, unless a statement of conformance is asked for by the customer or part of the labs procedures. All that is required for results is the measurand and the uncertainty of the measurement system at each point measured including the UUT's contribution.
 
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