ZX21B旋转式电阻箱
产品概述
ZX21B旋转式电阻箱是一款精密调节直流电路阻值的实验室仪器，采用旋转开关结构设计，阻值调节范围为0~99.9999kΩ，最小步进0.1Ω。该产品由六个十进电阻盘串联组成，每个电阻盘包含五个精密电阻元件，采用康铜和锰铜丝绕制，确保阻值稳定性。仪器具有30±5mΩ的低零值电阻特性，适合需要高精度电阻调节的场合。产品外形尺寸为200×150×110mm，重量约1.3kg，便于实验室移动和操作。123
技术特点
ZX21B采用轻压力开关接触设计，接触电阻小且变差稳定，确保长期使用可靠性。电阻箱电路与外壳之间绝缘强度可承受50Hz/2000V交流电压1分钟测试，绝缘电阻不小于1000MΩ。产品工作环境要求为温度+10℃~+35℃，相对湿度30%~80%。当需要小范围电阻调节时，可通过"0"和小示值接线柱连接，有效减小引线电阻影响。仪器在长期存放后如出现接触不良，可通过清洗转换开关接触点与电刷片氧化层恢复性能。3512
应用领域
ZX21B旋转式电阻箱广泛应用于学校电学教学实验、工厂电子设备测试及科研单位精密测量领域。在教学场景中，可帮助学生理解电路基础原理和电阻概念；在工业领域，适用于电子元器件测试和仪器校准；在科研工作中，能为精密测量提供稳定的阻值参考。产品特别适合需要多档位电阻调节的直流电路实验，通过六个十进盘的组合可精确设定所需阻值。2711
Product Introduction
The ZX21B rotary resistance box is a precision instrument designed for DC circuit resistance adjustment in laboratory environments. With a resistance range of 0-99.9999kΩ and minimum step of 0.1Ω, it features six decades of resistance switches connected in series. Each decade consists of five precision resistance elements wound with constantan and manganin wires to ensure stable performance. The compact design (200×150×110mm) and lightweight construction (1.3kg) make it highly portable for various experimental setups.1323
Technical Features
This resistance box adopts low-contact-resistance switches with reliable long-term performance. It demonstrates excellent insulation characteristics, withstanding 2000V AC voltage at 50Hz for 1 minute while maintaining insulation resistance above 1000MΩ. The recommended operating environment ranges from +10℃ to +35℃ with 30%-80% relative humidity. For fine resistance adjustment, special terminals are provided to minimize lead resistance effects. The rotary switches allow smooth operation and precise resistance selection, while the durable construction ensures consistent performance over extended periods.51214
Applications
The ZX21B serves multiple purposes in educational, industrial and research settings. In teaching laboratories, it helps demonstrate fundamental electrical principles and Ohm s law applications. Manufacturing facilities utilize this instrument for electronic component testing and equipment calibration. Research institutions employ it as a stable resistance reference for precision measurements. Its versatile decade switching system enables accurate resistance configuration for various DC circuit experiments, making it an essential tool in electrical engineering applications.2711
|
