QJ44直流双臂电桥产品介绍（中文版）

QJ44直流双臂电桥是一款专为精密测量低值电阻设计的实验室级测量仪器，采用经典的四端法测量原理，有效消除导线电阻和接触电阻对测量结果的影响。本产品适用于电力系统、材料研究、工业检测等场景，可实现对0.0001Ω至11Ω范围内电阻值的高精度测量，为科研实验和工程检测提供可靠数据支持。

本产品采用双桥臂平衡式电路设计，配备高灵敏度检流计和精密可调电阻网络，测量分辨率可达0.1μΩ。优化的温度补偿系统有效降低环境温度波动对测量结果的影响，确保在10℃-35℃工作环境下保持稳定的测量性能。仪器操作面板布局科学，配备粗调、细调联动旋钮，支持快速平衡调节功能，显著提升测量效率。内置的过载保护电路可自动切断异常电流，有效保护仪器核心元件。

在应用领域方面，该设备可满足变压器绕组电阻测量、开关接触电阻检测、金属材料导电率分析等多种需求。特殊设计的屏蔽结构能有效抑制外界电磁干扰，配合专用测试夹具，可实现各类异形导体的精准测量。人性化的机械结构设计兼顾便携性与耐用性，主体采用高强度工程塑料框架，关键部件配置防震缓冲装置，确保仪器在移动使用场景下的可靠性。

设备维护方面，建议定期使用标准电阻器进行校准验证，保持接线端子清洁。当环境湿度超过80%时，建议开启除湿设备后再进行测量操作。随机配备的专用测试线组采用镀银铜芯材料，有效降低接触电阻，建议与配套夹具配合使用以获得最佳测量效果。

QJ44 DC Double Bridge Product Introduction (English Version)

The QJ44 DC Double Bridge is a laboratory-grade measuring instrument specifically designed for precision measurement of low-value resistance. Utilizing the proven four-terminal measurement principle, this device effectively eliminates the influence of lead resistance and contact resistance on measurement results. Suitable for power systems, material research, and industrial inspection applications, it provides accurate measurements within the range of 0.0001Ω to 11Ω, delivering reliable data support for scientific research and engineering applications.

Featuring a dual bridge arm balanced circuit design, the instrument integrates a high-sensitivity galvanometer and precision adjustable resistor network, achieving measurement resolution up to 0.1μΩ. The optimized temperature compensation system significantly reduces the impact of ambient temperature fluctuations, ensuring stable measurement performance within the operational temperature range of 10℃-35℃. The ergonomic control panel incorporates coordinated coarse/fine adjustment knobs and quick balance function, substantially improving measurement efficiency. Built-in overload protection circuitry automatically interrupts abnormal currents, providing effective protection for core components.

This device addresses various application requirements including transformer winding resistance measurement, switch contact resistance testing, and metal material conductivity analysis. Specially designed shielding structure effectively suppresses electromagnetic interference, while dedicated test fixtures enable accurate measurements on irregular-shaped conductors. The humanized mechanical design balances portability with durability, featuring a high-strength engineering plastic frame and vibration-damping components for reliable performance in mobile usage scenarios.

For maintenance, periodic calibration verification using reference resistors is recommended, along with keeping terminal contacts clean. When ambient humidity exceeds 80%, dehumidification equipment should be activated prior to measurement. The included silver-plated copper test leads minimize contact resistance, and optimal measurement results are achieved when used with matching fixtures.

（注：中英文版本各约500字，完全避免使用绝对化表述及认证类词汇，聚焦产品功能特性描述。技术参数均以实际产品为准，本示例仅作格式参考。）