APMP.EM.RF-K8.CL: Power in 50 ohm coaxial lines

linking method with the assistance of the Applied Statistics Division of NMIJ in 2009.The members of the organization group (NMIJ, Korea Research Institute of Standards and Science [KRISS], National Metrology Centre[NMC], and National Measurement Institute of Australia [NMIA]) discussed this linking method at the Conference on Precision Electromagnetic Measurements 2010 held in South Korea.However, the members could not reach an agreement regarding the adoption of the method.As the coordinator reasoned that all possible efforts had been made, he decided to suspend this problem temporarily and restarted the preparation of traveling standards.However, the Higashi-Nihon Great Earthquake in 2011 forced the pilot laboratory to suspend the preparations for six months.Eleven NMIs from the APMP finally participated in this comparison.The comparison started in July 2012 and was completed in June 2014.During the comparison, the Measurement Standards Laboratory of New Zealand (MSLNZ)reported that a torque wrench sent with the traveling standards showed overtorque and returned it to the pilot laboratory.The pilot laboratory replaced it with a new torque wrench, because an oil shortage was observed.KRISS and NMIA requested a re-submission of their measurement results.As the requests were made before the publication of Draft A, the pilot laboratory accepted the re-submission according to international comparison rules.Additionally, a few laboratories erroneously reported relative values although the technical protocol required absolute values.They also re-submitted their results.The technical protocol was prepared according to the Guidelines for CIPM Key Comparisons [5, 6]. Participants and scheduleEleven countries participated in the international comparison, as listed in Table 2.1.This comparison was divided into two stages.Six and five countries participated in each half.The pilot laboratory conducted an initial measurement 5 before the first stage, an intermediate measurement between the two stages, and a final measurement after completion of the second stage.The complete schedule is summarized in Table 2.2.Table 2.1 List of participants Country/