The results of additional bilateral comparison of initial standards of the impulse electrical voltage unit were considered. As a result of comparison there were confirmed announced uncertainties and calibration and measurement capabilities of the participants of comparison. The comparison was carried out under guidance of COOMET (project 710/RU-a/16) оn the initiative of national metrology institutes (NMI): VNIIFTRI (Russia) and BelGIM (Republic of Belarus). The comparison involved national standards: the State primary standard unit of the impulse electrical voltage unit (GET 182-2010, VNIIFTRI) and the original standard of the impulse electrical voltage unit BelGIM. Step pulse generator TMG030010SN11-M1 was used as a traveling standard. The values of the impulse electrical voltage, reproduced by means of traveling standard, were measured by national standards.The purpose of comparison was to confirm confidence in the measurement results and calibration certificates, issued by the NMI in the field of impulse electrical voltage measurements. In the comparison VNIIFTRI acted as a pilot laboratory. Measurements of impulse electrical voltage by means of traveling standard were carried out in the following order: first – measurements of impulse electrical voltage on GET 182-2010, then – on the original standard of BelGIM and finally – again on GET 182-2010. Processing of the results of comparison according to χ2(i) criterion showed that χ2(i) criterion values (calculated on the basis of the measurement results) doesn’t exceed a critical value χ2, that is the objective confirmation of announced uncertainties, declared by the participants of comparison.
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