ZX21e旋转式电阻箱
产品概述
ZX21e旋转式电阻箱是一款专为直流电路设计的精密可调电阻仪器，采用高稳定锰铜合金线无感绕制工艺，确保电阻值的高精度和长期稳定性。该设备通过旋转开关实现阻值调节，操作简便且接触可靠，适用于实验室、教育及工业领域的电学实验与设备校准。其核心特点包括宽阻值范围（0~11.11110MΩ）、低零值电阻（30±5mΩ）以及优异的绝缘性能（绝缘电阻≥1000MΩ），能够满足多种场景下的电阻调节需求。1611
技术特点
ZX21e采用六组十进开关串联结构，每档电阻由精密电阻元件组成，最小步进值为10Ω，支持连续调节。电阻元件经特殊工艺处理，温度系数低，抗老化性强，确保在10℃~35℃环境温度下性能稳定。设备外壳采用绝缘材料，可承受50Hz/2000V交流电压的绝缘强度测试，安全可靠。此外，其轻量化设计（约1.3kg）和紧凑尺寸（200×150×110mm）便于携带与安装。2712
应用场景
该电阻箱广泛应用于学校物理实验、科研机构电路研究以及工业电子设备测试。例如，在教学场景中帮助学生理解欧姆定律和分压原理；在工厂中用于校准万用表或直流电桥；在科研中配合其他仪器完成高精度电学测量。用户可通过“0”和小阻值接线柱的组合，进一步减少引线电阻对微小阻值测量的影响。5815
使用与维护
使用前需旋转各组旋钮确保接触稳定，避免超过额定电流（参考各档位限流值）。长期存放时需置于干燥、无腐蚀性气体的环境中，定期清洁开关触点并涂抹中性凡士林以延长寿命。注意避免剧烈震动或高温环境，以保持性能。61218
Product Overview
The ZX21e rotary resistance box is a precision adjustable resistor designed for DC circuits, featuring manganin alloy wire wound with non-inductive technology for high stability and accuracy. With a resistance range of 0~11.11110MΩ and low residual resistance (30±5mΩ), it is ideal for educational, industrial, and research applications requiring reliable resistance adjustment. Its robust insulation (≥1000MΩ) ensures safety during operation. 11116
Key Features
Equipped with six decades of rotary switches, the ZX21e allows step-by-step adjustment (minimum 10Ω/step). The resistance elements are treated for low temperature coefficient and durability, maintaining performance within 10℃~35℃. The compact design (200×150×110mm, 1.3kg) and insulated housing (withstands 2000V AC) enhance portability and safety. 2712
Applications
Suitable for physics experiments, circuit research, and industrial calibration, such as verifying Ohm s Law in classrooms or testing electronic equipment in workshops. The "0" terminal option minimizes lead resistance effects for low-resistance measurements. Compatible with multimeters and bridges for versatile use. 5815
Usage & Maintenance
Rotate switches before use to stabilize contacts, and avoid exceeding current limits. Store in dry, non-corrosive environments. Periodic cleaning of contacts with alcohol and applying neutral grease is recommended. Avoid mechanical shocks or extreme temperatures. 61218
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