Connect the oil line of the oil pipe in and out, connect 380V, connect the safety ground line, check whether each circuit is connected safely, whether the valve of each oil line is open, and then carry out the operation procedure after all is ready. First start the cooling water pump, check whether the water circulation is normal, and then point the vacuum pump, so that the oil in the vacuum pump can operate normally, and then make the vacuum pump continuous operation. When the vacuum surface reaches the limit, the oil inlet valve can be opened to check the oil level in the lower window of the vacuum cylinder. When the oil level is seen in the lower window of the vacuum cylinder, the oil discharge pump switch can be started, the oil discharge filter impurity oil circuit can be normally circulated, and the heater switch can be turned on to release the water in the volatile oil. If there is a large amount of water in the oil, the end of the oil in the vacuum cylinder will increase. At this time, the vacuum degree suitable for the open air control must be played. After the water content is reduced and the oil drift drops, the air discharge valve must be closed to make the vacuum reach the limit. At this time to pay attention to the reaction of the instrument, if the pressure gauge reading is greater than 0.3 MPa, said in the Ming and qing filter filter paper absorb more impurities, need to change a new filter, work has been completed, see the working principle of open valve, make the vacuum degree at normal atmospheric pressure, the cylinder oil, the remaining oil from the oil drain plug inside out, to prevent the next time when using mixed with different types of oil, and pay special attention to in winter, put the net inside the vacuum pump and water tank, otherwise to freeze vacuum pump and storage tank.