High and low temperature coolant testing machines are common equipment in industrial production and laboratories, which are used to simulate coolant performance in different temperature environments. The correct power line connection is essential for the proper operation of the test machine. This paper will introduce the connection method of the high and low temperature coolant test machine power supply line in detail to ensure the safe and stable operation of the equipment.

　　First, the preparation before the power line connection

　　1, before the power line connection, you need to make the following preparations:

　　2. Confirm the power supply voltage: Check whether the voltage of the power supply is consistent with the voltage required by the test machine to avoid damage to the equipment caused by too high or too low voltage.

　　3, check the power cord: ensure that the power cord is intact, there is no exposed wire or damaged insulation layer, to prevent electric shock or short circuit.

　　4. Prepare tools: Prepare the required tools, such as screwdrivers and wire strippers, for use in the connection process.

　　Second, power line connection steps

　　Follow these steps to connect the power line:

　　1, Turn off the power switch: before connecting the power line, ensure that the power switch of the test machine is turned off to avoid the risk of electric shock.

　　2, Connect the power cord: Connect one end of the power cord to the power interface of the test machine, usually the power interface is located at the back or side of the test machine. Use a screwdriver to secure the power cable.

　　3. Grounding treatment: Connect the grounding wire of the power cord to the grounding terminal of the testing machine to ensure the safe grounding of the equipment. The grounding cable is used to import static electricity or leakage from the device to the ground to prevent electric shock accidents.

　　4. Connect the power socket: Insert the other end of the power cord into the power socket that meets the requirements. Make sure the socket is stable, reliable and in good contact.

　　5, check the connection: carefully check the connection of the power line is firm, no loose or exposed wires. After confirmation, you can turn on the power switch to test.

　　Third, precautions

　　When connecting the high and low temperature coolant test machine power supply line, the following matters need to be noted:

　　1. Avoid wiring errors: Ensure that the live wire, neutral wire, and ground wire of the power cable are correctly connected to the corresponding terminals to avoid equipment damage or electric shock caused by wiring errors.

　　2, to prevent damage to the power line: in the connection process, to avoid the power line by excessive bending, twisting or pulling, to prevent the breakage of the wire or insulation layer damage.

　　3, regularly check the power line: regularly check the connection of the power line, such as loose, damaged or aging problems, should be handled and replaced in time.

　　In short, the correct power line connection is essential for the normal operation of the high and low temperature coolant tester. By following the above connection methods and precautions, you can ensure the safe and stable operation of the equipment, and provide reliable support for industrial production and laboratory research.