QJ84数字直流(双)电桥
产品概述
QJ84数字直流（双）电桥是一种高精度电阻测量仪器，采用数字化智能技术设计，适用于金属导体、导线、电动机绕组、变压器绕组等低值电阻的精密测量。该产品结合了传统凯尔文电桥的稳定性与数字仪表的便捷性，具有测量范围宽、分辨率高、操作简便等特点，广泛应用于电线电缆、导电材料、科研机构及工业检测领域。仪器采用四端钮法接入被测电阻，有效消除接触电阻影响，确保数据准确性。其LED或LCD大屏幕显示清晰直观，支持多档位自动切换，测试速度快，可满足不同场景的测量需求。136
技术特点
QJ84电桥的核心优势在于其高精度与智能化功能。测量范围覆盖0.1μΩ至20kΩ（部分型号可达2.5MΩ），分辨率最低达0.01μΩ，基本误差限为0.05%级。内置恒流源和自动换档功能，可根据电阻大小动态调整测试电流（0.001mA~2A），避免手动操作的繁琐。此外，仪器支持数据存储（部分型号可保存200组数据）和校准功能，用户可通过标准电阻进行定期校验，确保长期稳定性。外壳设计紧凑（典型尺寸265mm×110mm×295mm），重量约2.5kg，适合实验室和现场使用。248
应用场景
该电桥是电线电缆行业检测芯线电阻的理想工具，也可用于电力设备（如变压器、电机）的绕组电阻测试。其抗干扰能力强，适用于存在电磁干扰的工业环境。部分型号支持电池供电（如DC9V或DC12V），便于无交流电源的户外作业。针对感性负载测量，产品内置多重保护机制，可有效防止反电势损坏设备，提升安全性。5711
Product Overview
The QJ84 Digital DC (Double) Bridge is a high-precision resistance measurement instrument designed with digital intelligence technology. It is suitable for precise measurement of low-value resistances in metal conductors, wires, motor windings, and transformer windings. Combining the stability of traditional Kelvin bridges with the convenience of digital meters, it features a wide measurement range, high resolution, and user-friendly operation, making it widely used in wire and cable industries, conductive materials, research institutions, and industrial testing. The four-terminal connection method eliminates contact resistance interference, ensuring data accuracy. The large LED or LCD screen provides clear readings, and multi-range auto-switching enhances testing efficiency for diverse scenarios.169
Technical Features
The QJ84 bridge excels in precision and smart functionality. Its measuring range spans 0.1μΩ to 20kΩ (extendable to 2.5MΩ in some models) with a resolution as low as 0.01μΩ and a basic error limit of 0.05%. Equipped with a built-in constant current source and auto-ranging, it dynamically adjusts test currents (0.001mA~2A) based on resistance values, eliminating manual adjustments. Additional features include data storage (up to 200 groups in certain models) and calibration via standard resistors for long-term stability. The compact design (typical size 265mm×110mm×295mm) and lightweight (~2.5kg) suit both lab and field applications.2412
Applications
This bridge is ideal for wire and cable core resistance testing and electrical equipment (e.g., transformers, motors) winding measurements. Its strong anti-interference capability adapts to industrial environments with electromagnetic noise. Battery-powered models (e.g., DC9V/12V) support outdoor operations without AC power. For inductive loads, built-in multi-protection mechanisms prevent damage from back EMF, enhancing operational safety.5714
QJ84数字直流(双)电桥
的详细介绍
| 名称：QJ84数字直流双臂电桥 |
| 详细内容
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