UJ25 直流高电位差计产品介绍
一、中文介绍（约450字）
UJ25型直流高电位差计是一款基于精密补偿原理设计的高性能电位测量仪器，适用于科研实验、工业检测及精密计量等领域对直流电压的高精度测量需求。该设备采用模块化电路设计和多重防护结构，在保证测量精度的同时提升了操作便捷性与环境适应性。
核心特点方面，仪器具备0.01级测量精度，可支持0.01μV至1.911110V的宽量程测量。独特的温度补偿系统有效降低了环境温度波动对测量结果的影响，配合高稳定性电阻网络设计，确保设备在连续工作状态下仍能保持优异的测量重复性。三端钮输入设计有效消除接触电阻干扰，内置的极性切换装置支持正反向电压快速测量。
在结构设计上，仪器采用多层电磁屏蔽技术，大幅降低外界电磁干扰对测量精度的影响。机械调零装置与电子调零系统双重配合，简化了设备校准流程。大尺寸刻度盘配合游标读数机构，使最小分度值达到0.1μV，显著提升目视读数的准确性。
应用场景覆盖高校物理实验室的精密电势测量、电子元器件厂的基准电压校准、以及计量机构的量值传递工作。其分体式结构设计便于维护保养，标准化接口支持与数字电压表、标准电池等多种设备协同工作，满足不同场景下的复合测量需求。
操作体验方面，仪器面板布局符合人体工程学原理，防滑旋钮与阻尼调节装置使操作过程更加精准可控。全封闭式外壳采用工程塑料与金属复合材质，既保证设备强度又减轻整体重量，配合底部防震脚垫设计，有效提升设备在移动使用中的稳定性。
二、English Introduction (approx. 420 words)
The UJ25 DC High-Potential Potentiometer is a precision measurement instrument designed for accurate determination of DC voltage differences in scientific research, industrial testing, and metrological applications. Utilizing a compensated circuit architecture, this device achieves exceptional measurement stability while maintaining operational simplicity across various working environments.
Technical features include a 0.01-class accuracy rating with measurable range spanning from 0.01μV to 1.911110V. The integrated temperature compensation mechanism effectively neutralizes ambient temperature variations, working in tandem with a highly stable resistor network to ensure measurement consistency during prolonged operation. The three-terminal input configuration minimizes contact resistance interference, complemented by a bidirectional polarity switching system for rapid voltage measurements.
Structural innovations encompass multi-layer electromagnetic shielding that significantly reduces external interference. The dual calibration system combining mechanical zero adjustment and electronic null detection simplifies device calibration procedures. A large-diameter graduated dial paired with vernier reading mechanism enables visual resolution down to 0.1μV, enhancing measurement readability.
This potentiometer finds applications in university physics laboratories for precise electromotive force measurement, electronic component factories for reference voltage calibration, and metrological institutes for value transmission tasks. The modular construction facilitates maintenance operations, while standardized interfaces allow seamless integration with digital voltmeters and standard cells for composite measurement requirements.
Ergonomic design elements include anti-slip knobs and damped adjustment mechanisms that ensure precise control during operation. The hybrid enclosure constructed from engineering plastics and metal alloys provides structural durability with reduced weight, supported by vibration-damping feet to enhance stability during mobile usage.
Measurement reliability is further reinforced by the precision-machined slide wire mechanism, which maintains contact consistency through over 100,000 operational cycles. The device s open-frame construction allows convenient access for periodic verification, while maintaining measurement integrity through optimized thermal management design.
With its balanced performance in accuracy, durability, and user accessibility, the UJ25 serves as a dependable tool for professionals requiring trustworthy voltage measurements in critical applications. The instrument s design philosophy emphasizes long-term measurement stability, making it suitable for extended observation tasks in controlled laboratory environments.
