First, the inspection content before each use Whether the whole machine is stable. Is the electrical grounding good? Is the pump water supply normal? Stirring and lifting mechanism is operating normally. Second, the operation notes 1, the quality of each added material (including water) should not exceed 1225kg. 2. After the material is discharged, the material can be lifted after the discharge door is closed. 3. The order of feeding to the hopper should be: sand, cement, stone or stone, cement, sand. 4. At the same time as feeding, add water to reduce the mixing time and reduce dust flying. 5. After the hopper is raised, it is strictly forbidden for anyone to stay under the bucket. 6. It is strictly forbidden for the non-local driver to operate the handle and button at will. 7, pay attention to electrical safety, to prevent electrical components, wires from moisture and damage. 8. If the machine is shut down during the mixing process, the manual and manual unloading device should be used to discharge 50% of the material, and then the cause is found. 9. During the operation, no maintenance is allowed. 10. When the warning light is on, the left upper limit switch is disabled and should be replaced or repaired in time. 11. It is forbidden to run the pump in the waterless state, otherwise the mechanical seal will be damaged.