产品名称：FMT51普通型十进电感箱 / FMT51 General-Purpose Decade Inductance Box
【中文介绍】
FMT51普通型十进电感箱是一款专为电子电路实验和教学场景设计的精密电感调节设备。该产品采用模块化十进制结构设计，通过旋钮式开关实现电感值的逐级调节，可提供0.1mH至100mH范围内连续可调的电感量，最小调节步进为0.1mH。整机采用金属合金屏蔽外壳，有效降低电磁干扰对测量精度的影响，适合实验室、科研单位及电子爱好者进行电路调试、滤波器设计等应用。
本产品核心部件选用优质坡莫合金磁芯和耐氧化铜线绕组，配合多层绝缘处理工艺，确保电感值在-10℃至+50℃工作温度范围内保持稳定。面板采用防刮耐磨的工程塑料材质，设有清晰的数字刻度盘和防滑调节旋钮，操作时可通过触感反馈准确感知档位切换。内部电路采用星型接线方式，有效降低寄生电容对高频信号的影响，在20Hz-5kHz频率范围内呈现良好的线性特征。
在功能设计方面，提供三组独立接线端子，支持串联或并联接入方式，满足不同电路拓扑需求。底部配置防滑橡胶脚垫和便携提手，兼顾设备稳定性和移动便利性。建议用户在使用时保持环境湿度低于80%RH，避免粉尘沉积影响触点导电性能。通过合理的日常维护，该设备可长期保持测量精度与操作可靠性，为电子系统开发提供灵活的电感参数模拟支持。
【English Introduction】
The FMT51 General-Purpose Decade Inductance Box is a precision inductance adjustment device designed for electronic circuit experimentation and educational applications. Featuring a modular decade structure with rotary switch controls, it provides continuously adjustable inductance from 0.1mH to 100mH in 0.1mH increments. The metal alloy shielding enclosure effectively minimizes electromagnetic interference, making it suitable for laboratory environments, research facilities, and electronics enthusiasts engaged in circuit debugging and filter design.
Constructed with high-permeability permalloy cores and oxidation-resistant copper windings, the unit maintains stable inductance values within an operational temperature range of -10°C to +50°C. The front panel incorporates wear-resistant engineering plastic with clearly marked numerical dials and non-slip control knobs, offering tactile feedback for precise range selection. The internal star-type wiring configuration reduces parasitic capacitance effects, ensuring reliable linear performance across 20Hz-5kHz frequency spectrum.
Functionally, three sets of independent terminals allow series or parallel connections to accommodate various circuit configurations. Non-slip rubber feet and an integrated carrying handle enhance both operational stability and portability. For optimal performance, users are advised to maintain ambient humidity below 80%RH and prevent dust accumulation on contact surfaces. With proper maintenance, this device delivers long-term measurement accuracy and operational reliability, serving as a versatile inductance simulation tool for electronic system development.
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