Address:
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15-7,SHIBAURA 4-CHOME,MINATO-KU,
, TOKYO, JAPAN TOKYO, 108-0023, Japan
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Abstract:
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Japan Electric Meters Inspection Corporation (JEMIC) has performed the calibration of about 50,000 measuring instruments a year in the field of electrical quantities, temperature, and photometry. In addition, JEMIC is a calibration laboratory accredited by the Japan Calibration Service System (JCSS). In this paper, the JCSS calibration system for the capacitance standard is presented. The capacitance standard in JEMIC is maintained using a 100 pF capacitor (ANDEEN-HAGERLING Type 11A) and is supplied by the National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (NMIJ/AIST). Furthermore, the capacitance standard is extended to 1, 10,100, and 1000 pF, and to 0.01, 0.1, 1, and 10 µF using a high-precision transformer bridge (ratio 10:1) based on the 100 pF capacitor. The best measurement capability (BMC) is 0.73 µF/F (k =2) at 100 pF and 1 kHz. On the other hand, in order to satisfy the demand for low-cost calibration from the industry, an autocalibration system which combines an LCR meter (Aglilent Type 4284A) with a coaxial scanner was constructed. Its BMC is 50 µF/F (k =2) at 1 kHz.
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