FMQJ-2两用非平衡电桥产品介绍（中英文）
【中文版】
FMQJ-2两用非平衡电桥是一款创新型精密测量仪器，专为科研实验、教学演示及工业检测场景设计。该设备通过独特的电路架构实现了电阻测量与微弱信号检测的双重功能，适用于半导体材料研究、传感器标定、热敏元件分析等多元化场景，为实验室和工程现场提供灵活高效的解决方案。
在功能实现方面，本产品采用智能化量程管理技术，可在0.1Ω至10MΩ范围内自动匹配最佳测量模式，有效兼顾微小电阻变化检测与大范围阻值测量需求。三端四线制接线方式显著降低接触电阻干扰，配合温漂抑制电路设计，确保在-10℃至50℃环境条件下保持±0.05%的基础精度。人性化操作界面配备双显示屏，可同步显示实时测量值与相对变化曲线，便于用户快速捕捉动态参数特征。
该电桥系统特别强化了抗干扰性能，内置多级滤波模块能有效抑制80dB以上的环境噪声。针对工业现场需求，设备提供RS-485与USB双通讯接口，支持测量数据实时导出及远程监控功能。模块化结构设计使维护保养更为便捷，核心电路单元采用插拔式封装，显著提升设备可维护性。
在教育教学领域，FMQJ-2通过可调节的模拟信号发生功能，能够生动演示非平衡电桥的工作原理，配套实验教学软件包含十余种预设实验方案，帮助学生直观理解惠斯通电桥的进阶应用。工业用户则可利用其连续监测模式进行长达72小时的稳定性测试，配套数据分析软件支持自定义报警阈值设置。
【English Version】
The FMQJ-2 Dual-purpose Non-balanced Bridge is a precision measurement instrument designed for scientific research, educational demonstration, and industrial testing scenarios. Integrating resistance measurement with weak signal detection capabilities through innovative circuit design, this device serves diverse applications including semiconductor material analysis, sensor calibration, and thermistor characterization, delivering flexible solutions for both laboratory and field engineering requirements.
Featuring intelligent range management technology, the instrument automatically selects optimal measurement modes within 0.1Ω to 10MΩ range, effectively balancing requirements for detecting minute resistance variations and broad-range value measurement. The four-terminal Kelvin connection design minimizes contact resistance interference, while temperature drift compensation circuitry ensures ±0.05% basic accuracy across -10℃ to 50℃ operating conditions. The user-friendly interface incorporates dual displays for simultaneous visualization of real-time measurements and relative change curves, enabling rapid identification of dynamic parameter characteristics.
Enhanced with multi-stage noise filtration modules, the system demonstrates over 80dB environmental noise rejection capability. For industrial applications, dual RS-485 and USB communication interfaces support real-time data export and remote monitoring functions. The modular architecture simplifies maintenance through plug-and-play circuit modules, significantly improving serviceability.
In educational settings, the adjustable analog signal generation function vividly demonstrates non-balanced bridge principles. Preloaded teaching software includes 10+ experimental templates to help students visualize advanced Wheatstone bridge applications. Industrial users benefit from continuous monitoring mode supporting 72-hour stability tests, complemented by analysis software with customizable alarm thresholds.
The ergonomic chassis design incorporates vibration-damping feet and IP41 protection rating, making it adaptable to various working environments. Optional battery pack enables 8-hour cordless operation, particularly useful for field measurements requiring mobility. Three-year recommended calibration cycle and global voltage compatibility (100-240V AC) further enhance operational convenience for international users.
