Pay attention to the inspection before the operation of the integrated mixer, and the key inspection items before the operation shall meet the following requirements: the rise and fall range of the power supply voltage shall not exceed 5% of the rated value; The wiring of electrical components of the motor shall be firm, and the protective neutral connection or grounding resistance shall comply with the regulations; All transmission mechanisms, working devices, brakes, etc. are fastened and reliable, and open gears, pulleys, etc. are provided with protective covers; The oil quality and quantity of the gearbox meet the requirements.

作业前，应先启动混凝土搅拌机空载运转。应确认搅拌筒或叶片旋转方向与筒体上箭头所示方向一致。对反转出料的搅拌机，应使搅拌筒正、反转运转数分钟，并应无冲击抖动现象和异常噪音。

Before operation, the concrete mixer shall be started for no-load operation. It shall be confirmed that the rotation direction of the mixing drum or blade is consistent with the direction indicated by the arrow on the drum. For the mixer with reverse discharge, the mixing drum shall be transferred forward and backward for several minutes, and there shall be no impact shaking and abnormal noise.

然后进行料斗提升试验，应观察并确认离合器、制动器灵活可靠；然后检查并校正供水系统的指示水量与实际水量的一致性；当误差超过2%时，应检查管路的漏水点，或应较正截流阀；应检查骨料规格并应与搅拌机性能相符，超出许可范围的不得使用。

Then conduct the hopper lifting test, and observe and confirm that the clutch and brake are flexible and reliable; Then check and correct the consistency between the indicated water volume and the actual water volume of the water supply system; When the error exceeds 2%, the water leakage point of the pipeline shall be checked, or the shut-off valve shall be more positive; The aggregate specification shall be checked and shall be consistent with the performance of the mixer. Those exceeding the allowable range shall not be used.