The LDHL-200B Loop resistance tester is a professional testing equipment that integrates high-power switching power supply technology with intelligent electronic systems. Specially designed for high-precision measurement of high and low voltage switches, cables, wires, and weld contact resistance, supporting multiple levels of constant current output from 50A to 200A DC. The instrument is equipped with a 7-inch high-definition color touch screen and a high-speed thermal printer, supporting Bluetooth, USB, RS232/485 communication. It can seamlessly integrate with mobile apps and PC control, enabling remote data transmission and multi format report generation. Its intelligent functions include temperature automatic compensation, multi current average calculation, and over limit alarm, which are suitable for complex industrial scenarios, especially for the precise testing needs of power systems, manufacturing enterprises, and quality inspection agencies.

Intelligent interaction and efficient operation

7-inch 800 × 480 high-definition touch screen, supporting Chinese and English input and graphical operation interface, built-in wiring diagram guidance, reducing the threshold for use;

Bluetooth and APP remote control, one click completion of testing, data uploading, and report generation, suitable for mobile office scenarios.

Multi level current and high-precision measurement

Supports four levels of constant current output: 50A/100A/150A/200A, with the ability to set multiple current automatic switching tests and calculate the average value;

Using a precision quadruple integrator A/D converter and a 32-bit ARM chip, the resolution reaches 0.01 μ Ω and the accuracy is 0.5% RDG, meeting strict testing standards.

Multi functional extension and data management

Massive storage supporting over 20000 data records, exporting Excel files from USB flash drive, RS232/485 communication compatible with industrial Modbus RTU protocol;

The DC constant current source function can output gradually increasing current from 0-200A, making it versatile and saving equipment costs.

Temperature compensation and multi scene adaptation

Optional temperature sensor for real-time temperature collection, automatically converting resistance values at standard temperature to eliminate environmental errors;

Supports single-phase, two-phase (dedicated for conductor resistance), and three-phase testing modes, suitable for complex requirements such as cable joints and multi-phase equipment.

Industrial grade reliability and convenient design

Built in cold air cooling and thermal protection mechanism, supporting continuous operation in a wide temperature range of -25 ℃~50 ℃

High current wire quick plug and unplug interface, wire control/wireless remote control (optional) function, improves the efficiency of assembly line operations.

Flexible reporting and security assurance

Thermal printers can instantly output test reports and support custom site, personnel, and other note information;

Overcurrent protection and over limit alarm function ensure the safety of equipment and operation, and reduce testing risks.