Declaration of conformity for Testing of Grains

[nesrine]

hello everyone; our lab is working towards an iso 17025 accreditation in testing grains, the testing protocol is a standardised (standard n01) and uses standardised sieves (standard 02) now when calibrating those sieves must we confirme the conformity of those sieves to standard 02 or can we just skip the declaration of conformity even though the first standard require the sieves to conforme to standard 02 ? can someone please help on how to handle this in a way that is acceptable in an audit ?

 

[Jen Kirley]

hello everyone; our lab is working towards an iso 17025 accreditation in testing grains, the testing protocol is a standardised (standard n01) and uses standardised sieves (standard 02) now when calibrating those sieves must we confirme the conformity of those sieves to standard 02 or can we just skip the declaration of conformity even though the first standard require the sieves to conforme to standard 02 ? can someone please help on how to handle this in a way that is acceptable in an audit ?

Good day nesrine, I am sorry for the delay in this response.

From the way you describe it, I recommend you verify the sieves using traceable standards. I have found this article for you as well as this article.

I am not affiliated with CSC Scientific or Whitehouse Scientific.

 

[nesrine]

Hello Jen, thank you for answering my question, and thank you for troubling yourself and finding me the articles they are both very intresting and i will definetly read both of them however my problem is not with how to calibrate as we do send them to an accredited laboratory for calibration, my problem is "does the instrument conforme to the standard" i'll explain (hopefully clearly) with an example: the standard i use for grain testing is NF EN 15587 this standard specifies a set of sieves for different cereals; these sieves must conform to ISO 5223 which does provides tolerances for each sieve opening (for example 3.55 mm ±0.06) now my calibration certificate indicates that the maximum measured opening (the protocole is to measure it a certain number of times and than they give the minimum, median and maximum value registered) is 3.65 wich is above the (3.61=3.55+0.06) and now even though i know we could simply ask the calibrating laboratory to not include any declaration of conformity (not required by iso 17025) I wonder if my instrument is conforme to the standard (ISO 5223). can i still use it in testing ? will an auditor rule it as non conforming ?