Standar tegangan Josephson


Standar tegangan Josephson adalah standar acuan dalam memberikan definisi tentang tegangan listrik. Besaran turunan yang diberi definisi adalah frekuensi. Pada definisi awal digunakan tegangan listrik arus searah. Dalam standar ini, tegangan listrik arus searah diukur dalam rentang nilai antara 1-10 Volt. Pengukuran dilakukan dengan menerapkan teori kuantum. Perhitungan hasil pengukuran menggunakan fungsi Josephson. Tegangan listrik arus searah yang dihasilkan mempunyai tingkat ketelitian sebesar 0, 05 ppm. Standar tegangan Josephson digunakan untuk memelihara alat ukur standar tipe sekunder. Bentuknya adalah sekumpulan sel standar yang telah diberi proses diseminasi. Pada alat ukur sekunder, tingkat ketelitiannya menjadi 1,7 ppm. Standar tegangan listrik arus searah ini kemudian dapat diterapkan juga ke standar tegangan listrik arus bolak-balik. Proses standarisasi juga menggunakan diseminasi. Alat yang digunakan adalah kalibrator mutifungsi.[1]

Referensi

  1. ^ Sardjono, R. Hadi (2015). Metrologi Tegangan Listrik: Ketertelusuran dan Implementasi (PDF). Jakarta: LIPI Press. hlm. 4–5. ISBN 978-979-799-820-2. Diarsipkan dari versi asli (PDF) tanggal 2021-04-14. Diakses tanggal 2021-04-18. 

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