CH2516/A/B series DC resistance tester has the characteristics of high precision, wide range and high cost performance. It adopts the current mainstream 32bits CPU and high-density SMD mounting technology, 24-bit color 4.3-inch IPS color LCD screen, with intuitive and refreshing interface and convenient operation. The instrument has high anti-interference performance; The measuring range is 1uω-2mω; The display number is four and a half digits; The test speed can reach 20 times/second; The test accuracy can reach 0.05%; Temperature compensation can avoid the influence of ambient temperature on test work; This instrument is equipped with professional sorting function and data output function, etc. It has various sorting sound settings, and can be matched with Handler interface. It is applied to automatic sorting system to complete full-automatic assembly line test, which doubles the test efficiency. It is equipped with RS232 interface for remote control and data acquisition and analysis. This instrument is small, compact and full of functions. Through the four-terminal test method, various high, medium and low value resistors can be measured with high speed and high precision. Contact resistance of various switches; Contact resistance of connector; Relay package and contact resistance; Winding resistance of transformer, inductor, motor and deflection coil; Wire resistance; Metal riveting resistance of cars, ships and airplanes; Fuse, resistor, DC resistance of conductive rubber, low DC resistance such as printed circuit board line and hole resistance. Because the instrument is equipped with temperature compensation function, it is suitable for measuring the measured object whose resistance value changes due to temperature. Instruments are widely used in research and development, production line, feed detection and other places.In order to meet the requirements of different users, CH2516 series has three models to choose from. 2.2 technical specifications, characteristics, main functional technical specifications CH2516/A/B series technical specifications, including the basic technical indicators of the instrument and the allowable range of instrument testing. These specifications can be achieved when the instrument leaves the factory. See the complete technical specifications. See Appendix A for details. Measurement range standard type: ch25161uΩ-2mΩ (with temperature compensation) simple type 1: ch2516a 1uΩ-200kΩ simple type 2: ch2516b 10uΩ-20kΩ