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1. Before operation Ready-mixed concrete batching plants js500 twin shaft concrete mixer, check the weighing system of concrete batching machine whether it is in the normal operation. Eliminate it in time if there is blocking phenomenon.Henan Daswell Machinery is a professional manufacturer of mining machine for almost 30 years in China. We are dedicated to supplying our customers with best service and products, our major products include:commercial concrete batching plant,Ready-mixed concrete batching plants,Reversing drum concrete mixer,If you are interested in our products, please contact us freely: sales@daswell.com 2. Check the wiring of electric components whether it is connected correctly and firmly. Check the case of electric cabinet whether it is connected to the ground firmly. 3. During the operation, check whether every rotating part rotates normally small concrete batching plants, whether there is off tracking of conveyor belt, there are materials between belt and action roller. If there are faults, stop the machine and eliminate it immediately. 4. Add grease to the active components and disassemble the belt roller and add oil once every year. 5. When checking the machine, it is necessary to stop the machine and cut down the power supply. 6. Batching control machine must be equipped with facilities of rain-proof, sun-proof and dust-proof. 7. There must be no steel and big rocks mixing in the sand and stones to avoid damaging the conveyor belt. 8. In order to ensure the safety of batching control machine, it is forbidden to use the machine in the rainy day, thunderstorm and other atrocious whether. Cut down the power supply, disassemble the wiring between the transducer and batching control machine to prevent damaging the controller. 9. Fluctuation of power supply voltage must be smaller than -5～5%. 10. Calibrate the weighing system according to the calibration methods in the instructions of batching control machine every year to ensure the weighing accuracy.