Abstract
We have carried out a resistance comparison of four QHR
systems using a 100-Ohm resistor in a
temperature-controlled and hermetically sealed enclosure,
the comparison was performed in November and December
1998, the participants were Bureau International des
Poids et Mesures (BIPM), Bureau National de
Metrology-Laboratoire Central des Industries
Electroniques (BNM-LCIE) France, Physikalisch-Technische
Bundesanstalt (PTB) Germany, and Valtion Teknillinen
Tutkimuskeskus (VTT Automation) Finland, acting as a
pilot laboratory. The comparison results agree within 3
parts in 109 with a relative combined standard
uncertainty of ±1*10-8
Original language | English |
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Pages (from-to) | 238-241 |
Journal | IEEE Transactions on Instrumentation and Measurement |
Volume | 50 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2002 |
MoE publication type | A1 Journal article-refereed |