A 50 N dead-weight type force standard machine (DWM) was developed by the National Metrology Institute of Japan to expand the lower end of calibration force from 10 N to 1 N. The weights of the DWM consisted of a loading frame and a linkage-weight stack. The loading frame applied a gravitational force of 1 N to a force transducer under calibration. The calibration and measurement capability of the 50 N DWM was verified to be 2 × 10⁻⁵ relative using a tuning-fork type force transducer in accordance with ISO 376. The equivalence between the 50 N and 500 N DWMs was confirmed by performing an intralaboratory comparison using the tuning-fork type force transducer. Moreover, the competence of the transducer for the evaluation of DWMs was demonstrated.

日本国立计量学会开发了一种50 N的自重式推力标准机（DWM），以将校准力的下限从10 N扩展到1N。DWM的重量包括一个加载框架和一个连杆重量堆栈。加载框架在校准下向力传感器施加了1 N的重力。使用ISO 376音叉型力传感器，相对于50 N DWM的校准和测量能力为2×10 ^-5。通过进行实验室内实验，确认了50 N和500 N DWM之间的等效性使用音叉型力传感器进行比较。此外，证明了换能器对DWM评估的能力。