Promote our Quality of Life By Accurate Measurment through Traceable Calibration

Abstract

Good quality of product increases quality of life. Accurate measurement data increases good quality of products, such as foods, electrical devices, construction materials, etc. Many factors determine the correctness and reliability of the measurement. Measurement traceability is one of great significance. In order to make sure the competence of testing and calibration laboratories, ILAC implements its policy on the traceability of measurement results (ILAC P10:01/2013) [1]. TAF (Taiwan Accreditation Foundation) adopts ILAC P10 to construct its own policy on the traceability of measurement results (TAF-CNLA-R04) [4]. In order to establish metrological traceability for their own activities, some of the accredited laboratories perform internal calibrations or "In-house" calibrations. How to make sure the correctness and reliability of the internal calibration? TAF has a requirement for internal calibrations, that is, "Technical Criteria for internal Calibrations" (TAF-CNLA-T18) [5]. The laboratories performing internal calibration shall establish calibration procedures for the calibration operation performed and shall meet the same technical criteria for accredited calibration laboratories. The estimation and expression of measurement uncertainty of these laboratories shall follow "ISO/IEC 98-3:2008 Uncertainty of measurement - Part 3: Guide to the expression of uncertainty in measurement (GUM: 1995))[2]". The results of uncertainty shall be provided to TAF for assessment. The internal calibration laboratories must have records of proficiency testing, at least one record every three years, for monitoring the validity of internal calibrations undertaken.