Interlaboratory proficiency testing of tensile and flexuraltesting for cellulose based transformed board material

Abstract

Optimum safety and reliability can be achieved by coordinating an interlaboratoryproficiency testing among different laboratories. Testing laboratories need to verifytheir test procedures and testing capability for reliable results. In this study,equivalent samples are prepared by cellulose based transformed board material used intransformers as electrical isolation material. Randomly selected test samples havingspecified dimensions are sent to the participant laboratories. Then they are tested andresults are analyzed according to previously defined parameters. Each laboratory appliedtensile and flexural tests on the samples according to procedures given in IEC 60641-2,2004 and IEC 60763-2, 2007 standards respectively. Test results are evaluated according tosame procedures explained in related standards by the participant laboratories. TUBITAKUME Material Testing Laboratory being the pilot laboratory collected to the all evaluatedresults including associated measurement uncertainties. Then the collected resultsevaluated according to ISO 17043, 2010 are reported by each laboratory as a part of theproficiency test report. Z-scores of the participant laboratories are presented.