The Czech Technical University (CTU), acting as pilot laboratory in an international comparison, has fabricated and provided as transfer standards four terminal-pair thermostatted travelling resistance standards with nominal values of 12906 Ω and 6453 Ω. Vishay S 102 K resistors form the resistive elements of these standards and 100 Ω platinum resistance thermometers make it possible to monitor their inner temperature. The laboratories participating in the comparison (five in Europe and one in Canada) were requested to measure the frequency dependences and time constants of the travelling standards by comparing them with resistors with calculable frequency performance. Calculable resistors of several different designs (monofilar, bifilar, quadrifilar and octofilar) were available. For both travelling standards, the ac-dc differences of the parallel equivalent resistance, as reported by the different laboratories, are within 13 parts in 10~(8) at 500 Hz and 70 parts in 10~(8) at 5000 Hz. The reported time constants differ by less than 3.9 ns and 4.8 ns, respectively.
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机译：捷克技术大学（CTU）作为国际比较中的试验实验室，已经制造并提供了标称值为12906Ω和6453Ω的四个终端对恒温行进电阻标准作为传输标准。 Vishay S 102 K电阻器构成了这些标准的电阻元件，而100Ω铂电阻温度计使监控其内部温度成为可能。要求参加比较的实验室（欧洲有5个，加拿大有1个）通过将其与具有可计算频率性能的电阻器进行比较来测量行进标准的频率依赖性和时间常数。可提供几种不同设计的可计算电阻器（单线，双线，四线和八线）。对于这两种行进标准，由不同实验室报告的并联等效电阻的ac-dc差在500 Hz时在10〜（8）的13份以内，在5000 Hz时在10〜（8）的70份以内。报告的时间常数相差分别小于3.9 ns和4.8 ns。
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