RT2232A数字微欧计(数字电桥)
RT2232A数字微欧计产品中文介绍
RT2232A数字微欧计是一款采用CMOS大规模集成电路与高精度恒流源设计的便携式数字仪表，具备41/2位分辨率并通过5位LED显示屏直观呈现测量结果。该仪器适用于测量各类低阻值电阻，如线圈电阻、电动机及变压器绕组电阻、电缆导线电阻、开关触点接触电阻等，可满足工厂、实验室等场景的精密测量需求。其核心特点包括自动/手动量程切换功能（覆盖0.1μΩ至1.9999kΩ范围）、采样速度2-3次/秒，以及温度稳定性（环境温度每变化10℃附加误差不超出基本误差值）。仪器采用四端测量法，通过恒流源输出电流在待测电阻上产生压降并由高灵敏度数字电压表检测，有效消除引线电阻干扰。操作时需注意预热60分钟以确保稳定性，且对带电感的电阻测量需遵循特定步骤以避免反电动势冲击。146
RT2232A Digital Micro-Ohmmeter Product Description in English
The RT2232A Digital Micro-Ohmmeter is a 4½-digit portable instrument integrating CMOS LSI technology and precision constant current sources, featuring a 5-segment LED display for clear readability. Designed for low-resistance measurements (0.1μΩ to 1.9999kΩ), it supports applications including coil resistance testing, motor/transformer winding analysis, cable conductor evaluation, and contact resistance checks for electrical components like switches and connectors. Key functionalities encompass dual-range mode (auto/manual), rapid sampling at 2-3 measurements per second, and temperature compensation to maintain accuracy within ±0.1% of reading under varying conditions. The four-terminal Kelvin measurement method ensures reliable results by minimizing contact resistance effects. Users should allow 60-minute warm-up for optimal performance and follow specific protocols when measuring inductive loads. Its compact design (240×320×105mm) and ≤3kg weight enhance portability for field or lab use. 158
技术原理与操作注意事项
仪器通过恒流源输出稳定电流至被测电阻，利用高精度数字电压表（灵敏度0.1μV）采集电压降并转换为电阻值显示。测量时需区分电压端（Hi/Lo）与电流端（I+/I-）的正确连接方式，对于导线或金属铆接电阻测试，建议采用专用夹具以确保接触点压力均匀。仪器内置过载保护功能，超量程时会显示"OL"提示，且具备极性自动识别功能。长期存放后首次使用时建议通电3-4小时以恢复性能稳定性。146
Technical Specifications & Usage Guidance
The device operates on 220V±10% AC power (50Hz) with ≤30W consumption, and incorporates protective features such as overload indication ("OL" display) and automatic polarity detection. For accurate measurements, the voltage sensing terminals (Hi/Lo) must be placed closer to the test point than current injection terminals (I+/I-) to eliminate lead resistance errors. Specialized test leads are recommended for conductor resistance measurements to ensure minimal contact resistance. When handling inductive loads, allow delayed disconnection post-measurement to dissipate stored energy. The instrument s maintenance includes periodic verification using standard resistors (0.001Ω–1kΩ) to confirm calibration status. 159
RT2232A数字微欧计(数字电桥)
的详细介绍
0.1µ～1.9999kΩ
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