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Calibration methods for low-voltage ac-dc transfer standards below 100 mV are described. Aiming to provide high-accuracy calibration services in Japan, we have developed micropotentiometers (μpots) and resistive voltage dividers (RVDs). Low-voltage ac-dc transfer calibrations of a commercially available thermal transfer standard with amplifiers (TTS) at NMIJ were performed using both the μpots and...
This paper describes the improved performance of thin film multijunction thermal converters (TFMJTC) that has been developed by NMIJ and NIKKOHM Co. Ltd. For the former type TFMJTCs, a deterioration of thermocouples was observed. The degradation prevention has been completed by changing the design and fabrication process of the thin-film thermopile to improve the durability of the TFMJTCs. Long-term...
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