Assessing Measurement Consistency of Reference Standards Through Intra-Laboratory En Criteria Analysis

• Abstract:

  Adherence to ISO/IEC 17025:2017 requires inter-laboratory comparisons and proficiency testing, alongside other measures, for ensuring test and calibration data validity. This study explores intra-laboratory comparison, as an additional quality assurance method. The presented procedure is conducted in an accredited calibration laboratory, by comparing results sourced/measured with multiple reference standards, including a high-voltage decade resistor, 8 ½ and 6 ½ digit multimeters, and a multifunction calibrator with a high-resistance measurement adapter, all of them covering the range of high resistance, above 100 MΩ. By applying the ISO/IEC 17043:2023 statistical methods and En criteria, the quantitative assessment of the measurement consistency is achieved, thus enhancing the confidence in the laboratory’s standards.
• Download:

  IMEKO-TC8-11-24-2025-018.pdf
• DOI:

  tc11-2025.018

Event details:

• IMEKO TC:

  TC11
• Event name:

  IMEKO TC8, TC11 and TC24 Conference
• Title:

  Joint conference of the TCs ‘Traceability in Metrology’ (IMEKO TC8), ‘Measurement in Testing, Inspection and Certification’ (IMEKO TC11), and ‘Chemical Measurements’ (IMEKO TC24).

• Place:

  Torino, ITALY
• Time:

  14 September 2025 - 17 September 2025