Sheet Metal Fabrication processing is formed by laser cutting or stamping process, shear and bending, bending, bending, welding, riveting. The Sheet metal fabrication used are cold-rolled plate (SPCC), hot-rolled plate, galvanized plate (SHCC) (SECC, SGCC), copper (CU) brass, copper, beryllium copper, aluminum (5052), stainless steel. Sheet metal fabrication processing steps: according to the parts drawing (3D) expanded into a plan (2D), laser cutting or die stamping shape, CNC punching each bending part, should pay attention to the direction of the burr of the workpiece. Then the students are welded or riveted (some). Surface treatment after processing: electroplating, passivation, sand blasting (powder), anode treatment. Products are generally made for the connection and the outer cover. Applications in robotics, drone, communications, medical devices, industrial automation equipment. Sheet Metal Fabrication Sheet Metal Fabrication,Oem Sheet Metal Fabrication,Sheet Metal Forming,Sheet Metal Bending Buildre Group Co., Ltd --- Hong Kong RYH CO., LTD , https://www.bldcncmachining.com
How to use the ground lead down resistance tester
Ground lead down resistance tester using method:
Instrument principle is as follows: From the current source through the "I +, I- two ports (also known as I-port), supply the measured resistance Rx current, the current size of the ammeter reading I, Rx voltage drop across the "V +, V-" The two ports (also called V-ports) are taken out and read out by the voltmeter V. The resistance of the measured resistance can be calculated by measuring the I and V. It can be seen that the ground lead-down line conduction tester The four-terminal method is used to eliminate the errors caused by the wire resistance and contact resistance.The ground lead wire continuity tester is wired according to the following wiring method: The HNDT-10A ground lead wire continuity tester instrument is provided with two wires. Test line, a red 50-meter line on the line plate, a large fork connected to the red terminal I+, a small fork connected to the red terminal U+, a black 5-meter line, a large fork connected to the black line Column I-, the small fork is connected to the black binding post U-. First find out the downlead that is qualified with the ground network connection as the reference point.
The ground lead wire resistance tester uses one end of the two measuring lines (50m, 5m) equipped with the instrument and is inserted into the instrument terminal block. The end with the test clamp is clamped to the reference point and the test point (black test line). Clipped at the reference point, the red test leads are clamped on each test point). In order to make the measured data correct, please try to handle the clean contact surface of the measured point. After confirming the connection is correct, connect 220V AC, close the power switch, and the instrument enters the power-on state. Press the “Measurement†button to start the test. The display area in the middle of the screen shows that the measured resistance value is the on-resistance value and the unit is mΩ. Press the "Measuring" button on the Ground Lead Tester to turn the instrument off, turn off the power, and close the test clips and place them in the accessory bag.