The effects of uncertainties in the alignment of the NIST watt balance with local gravity and the magnetic field of the balance have been analyzed, and techniques for measuring all misalignment parameters have been developed. The systematic uncertainty in the watt measurement due to alignment has been reduced to 0.04 /spl mu/W/W.
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机译：分析了NIST瓦特天平与局部重力和天平磁场对准时的不确定性影响，并开发了用于测量所有未对准参数的技术。由于对准导致的功率测量中的系统不确定性已降低至0.04 / spl mu / W / W。
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