Comparison on Weighing Instrument Calibration between Eramed Kosovo and GDM Albania

The General Directorate of Metrology (GDM) Albania, signed the agreement on collaboration with the Accredited Laboratory ERAMED N.T.SH from Kosovo, to conduct a proficiency testing (PT) in the field of calibration of weghing instrument. Usually testing and calibrating laboratories work with ISO/IEC 17025 standard, one of which requirements is that the laboratories should have quality control procedures for monitoring the validity of tests and calibrations undertaken. It is therefore important that such laboratories should regularly participate in a PT. A weighing instrument with capacity Max = 520 g and resolution d = 0.1mg was the subject of this comparison. The measurements were performed on February 2017, at mass laboratory of GDM. This paper describes and analyzes the comparative results and uncertainties associated obtained by this two laboratories. The aim of this comparison is to verify the competence of ERAMED laboratory in the field of calibration of NAWI (non automatic weighing instrument.) The results are analyzed using normalized errors values (En).