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1. Welding Machine Translation 4
C: Installation: C: Installation Distribution Box Power Distribution Box Argon Gas Meter Gas Cylinder Gas Cylinders Argon Welding Torch Welding Clamp Electrode Holder Grounding
1. The machine is placed in a well ventilated position, and the fan is not covered or blocked to prevent the cooling system from failing due to poor ventilation. There should be good ventilation at the location of machine, make sure that the ventilation fan is not covered and blocked, precaution should be taken to prevent failure of the cooling system due to lack of ventilation.
2、 Connect the protective gas and the gas supply circuit should include gas cylinders, argon gas, pressure reducing flow meters, and gas pipes; The connection part of the trachea should be tightly fastened with a throat clamp or other object to prevent argon gas leakage and air from entering. Protected gas should be connected properly; gas supply cycle should include gas cylinder, argon gas, decompression flowmeter and gas tube; to prevent the leakage of argon gas and the inflow of air, gas tube joint should be secured tightly by using hose clamp or other methods,
3、 Use a wire with a conductive cross-sectional area of not less than 6mm ² to reliably ground the chassis. The method is to connect the grounding screw on the back of the welding machine to the grounding device. For effective grounding, connect one end of a conductor wire with a cross-sectional area of not less than 6 mm² to the grounding screw at the back of the welding machine, and connect the other end to the grounding device.
4、 Insert the quick plug of the circuit cable into the quick socket with a polarity of "+" on the welding mac
2. UL Horizontal and Vertical Combustion Tester UL94 Standard Requirements
The strict standard requirements for UL horizontal and vertical combustion testing are as follows: ventilation window volume must be greater than or equal to 0.7 cubic meters to ensure the accuracy of combustion testing, and it is recommended to equip a glass observation door. Adequate oxygen supply is crucial during the testing process. Sealed box configuration: A flat mirror should be placed inside for easy observation after testing. Spray nozzle specifications: The length should be 100 ± 10mm, the inner diameter should be 9.5 ± 0.3mm, and it should comply with ASTM D 5025 standard. Timer accuracy: It must achieve a high precision of 0.1 seconds. Gas source: Use technical grade methane gas (with a purity of at least 98%), equipped with regulating devices and flow meters to ensure uniform gas flow. The heat output of natural gas should be controlled at 37 ± 1MJ/m. Temperature and humidity treatment room: The temperature is maintained at 23 ± 2 ° C, and the relative humidity is within the range of 50 ± 5%. Measurement tool: The micrometer requires a reading accuracy of 0.01mm, and the dryer should contain anhydrous calcium chloride or other desiccants to ensure that the humidity is below 20% at 23 ± 2 ° C. Oven: It must be a fully ventilated circulating air oven with at least 5 air changes per hour and temperature controll
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