Executive Agency Bulgarian Accreditation Service

SPECIFIC REQIREMENTS FOR TESTING

LABORATORIES WITH SCOPE OF

ACCREDITATION IN THE FIELD OF LOW

VOLTAGE DIRECTIVE.

PROBLEMS AND FUTURE DEVELOPMENT

Boyan Ivanichkov, M. Sc. Eng. Boyan Ivanichkov, M. Sc. Eng. EA “BAS” Lead AssessorEA “BAS” Lead Assessor

Executive AgencyExecutive Agency Bulgarian Accreditation ServiceBulgarian Accreditation Service

Used documents in accreditation process:

БДС EN ISO/IEC 17025:2006

ЕА documents

ILAC and IAF documents

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Specific problems of accreditation of testing laboratories with scope of accreditation in the field of

LOW VOLTAGE DIRECTIVE (LVD)

Traceability of measurements

evaluation and estimation of uncertainty

Implementation of standards for testing

interlaboratory comparisons and proficiency tests

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EA “BAS” policy for traceability of measurementspolicy for traceability of measurements

› in accredited laboratories for calibrationin accredited laboratories for calibration

› inin GDGD “ “NCMNCM”” (SAMTS) (SAMTS)

› in accredited laboratories for calibrationin accredited laboratories for calibration, , accredited by accredited by Accreditation bodyAccreditation body, , signatory of Multilateral Agreement of signatory of Multilateral Agreement of EA -EA - ЕА (ЕА ЕА (ЕА MLAMLA) ) in the field of calibration in the field of calibration


Problems, related to traceability: › Changes of legislation in the field of metrology, changes in

ordinance for verifying of measurement equipment› Market in the field of calibration needs time to reach grown

needs in the field of calibration › GDGD “ “NCMNCM”” (SAMTS) (SAMTS) deny calibration of some types of

measurement equipment and measurement equipment of low accuracy

› GDGD “ “NCMNCM”” (SAMTS) (SAMTS) is not signatory of BIPM MRA for all quantities

› laboratories calibrate measurement equipment abroad


Traceability by calibration in the laboratoryTraceability by calibration in the laboratory: :

› ensure environmental conditionsensure environmental conditions;;› purchase and calibration of standards and additional purchase and calibration of standards and additional

measurement equipment ;;› development and implementation of methods fordevelopment and implementation of methods for

callibrationcallibration › implementation of Guidanceimplementation of Guidance EAEA-4/02 “-4/02 “ExpressionExpression ofof thethe

UncertaintyUncertainty ofof MeasurementMeasurement inin CalibrationCalibration”” ;;› validation of calibration methodsvalidation of calibration methods, , objective evidence and objective evidence and

and records for validationand records for validation;;› intermediate checks intermediate checks .


Uncertainty - БДС EN ISO/IEC 17025:2006

Guidance and requirements for evaluation of uncertainty in quantitative testings

Guidance and requirements for reporting of estimated uncertainty



development and implementation of methods for evaluation /estimation/ of uncertainty

› Guidance ILAC-G17:2002 “Introducing the Concept of Uncertainty of Measurement in Testing in Association with the Application of the Standard ISO/IEC 17025”

› Guidance EA 4/16:2004 “EA guidelines on the expression of uncertainty in quantitative testing”


Uncertainty concept

› not only consider the single measurement but also the overall result of a test

› used for documenting the traceability of the measurement

› characterizes the reliability of the measurement

› has to be taken into account when testing results are compared with each other or against specifications


Problems inProblems in evaluation /estimation/ of uncertainty : › lack of experience and qualification of the personnel ;› lack of information for specific requirements, related with tests in the field of LVD› lack of knowledge of guidelines of ЕА and ILAC› insufficient understanding of uncertainty concept and it importance for the result› insufficient understanding of uncertainty concept in order to choose testing methods that are fit for purpose. .


Standards

› standards, adopted like БДС with translated first page› language barrier› validity of many standards have to be checked › verification of all used standards › objective evidence and records for validation


Requirements of Accreditation body for participation in interlaboratory comparisons and proficiency tests :

› scope of participation, related to accredited scope;

› frequency of participation

› PT providers


Interlaboratory comparisons and Proficiency tests Requirements of Accreditation body for participation in Interlaboratory comparisons and Proficiency tests

› ISO/IEC GUIDE 43 - 2 “Proficiency testing by interlaboratory comparisons - Selection and use of proficiency testing schemes by laboratory accreditation bodies”

› ILAC-G22:2004 “Use of Proficiency Testing as a Tool for Accreditation in Testing”.

ИЗПЪЛНИТЕЛНА АГЕНЦИЯ “БЪЛГАРСКА СЛУЖБА ЗА АКРЕДИТАЦИЯ”

THANK YOU FOR YOUR ATTENTION!

Executive Agency Bulgarian Accreditation Service

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