2.3.4. Power Sensor Accuracy

The YD322 oil pressure sensor with ±0.1% precision produced by Xian Yunyi Instrument Co., Ltd., Xi'an, China. is applied in the hydraulic power measurement. While the PY-M5S1.5N-L2M hall-type speed sensor with ±0.1% precision manufactured by Delan Electronics Co., Ltd., Dongguan, China. and the HX-900 Rotary Torque Sensor produced by Sanhe Yanjiao Huaxin Mechanical & Electrical Co., Ltd., Langfang, China. is used in the mechanical power measurement. Meanwhile, the CX8525 torque calibrator is used for static torque calibration and measurement, where the loading torque was set to 0%, ±20%, ±40%, ±60%, and ±100% of the full scale of the sensor by electromagnetically controlling the standard loading weights, and it was determined through testing that the static error of the torque sensors was lower than ±0.3%.
