CD-721/CD-721NH数字万用表产品介绍（中英文双语）
中文部分：
日本三和Sanwa CD-721/CD-721NH系列数字万用表是专为工业维护、电子研发和日常电气检测设计的精密测量工具。该系列产品以清晰的显示界面、稳定的测量性能和人性化操作体验为核心优势，适用于多种复杂场景下的电气参数检测需求。
CD-721基础型号配备6000字高精度液晶显示屏，支持直流/交流电压测量（最大1000V）、交直流电流测量（10A量程）、电阻、二极管及通断测试功能。改良型CD-721NH在基础功能上新增温度测量模块（-40℃~1000℃）和非接触电压检测（NCV）功能，有效提升现场作业的便捷性与安全性。两种型号均采用防滑抗震壳体设计，符合人体工学的旋钮布局使功能切换更加直观。
该系列产品搭载智能量程切换技术，可自动识别输入信号强度并匹配最佳量程范围，同时配备过载保护机制，在误操作情况下自动切断电路保障设备安全。独特设计的LED背光显示屏支持270度可视角度，在弱光环境下仍能清晰读取数据。便携式机身内置电池仓，配合低功耗电路设计可实现长达200小时的持续工作。
CD-721系列适用于电子设备维修、工业控制系统维护、教学实验等场景，其紧凑型结构设计便于携带与收纳，防护性探头接口和耐磨测试线材可满足长期使用需求。通过优化内部电路布局，设备在电磁干扰较强的环境中仍能保持测量稳定性，为专业技术人员提供值得信赖的检测支持。
English Version:
The Sanwa CD-721/CD-721NH Digital Multimeter series, developed by the Japanese precision instrument manufacturer Sanwa, delivers reliable electrical parameter measurement solutions for industrial maintenance, electronic development, and routine electrical testing. Engineered with intuitive operation interfaces and consistent measurement capabilities, this product line addresses diverse detection requirements in complex working environments.
The base model CD-721 features a 6000-count LCD display supporting DC/AC voltage measurement (up to 1000V), AC/DC current detection (10A range), resistance measurement, diode test, and continuity check. The upgraded CD-721NH variant adds practical temperature measurement (-40℃~1000℃) and non-contact voltage detection (NCV) functions, significantly enhancing operational efficiency and safety in field applications. Both models incorporate anti-slip housing with impact-resistant construction and ergonomic rotary switches for intuitive function selection.
Equipped with intelligent auto-ranging technology, the devices automatically detect signal intensity and select optimal measurement ranges, while built-in overload protection safeguards equipment during accidental misuse. The specially designed LED backlit display maintains 270-degree visibility, ensuring clear data reading in low-light conditions. Compact body design integrates a battery compartment, supporting up to 200 hours of continuous operation through optimized power management.
Ideal for electronic device repair, industrial control system maintenance, and educational laboratories, the CD-721 series features space-efficient construction for easy portability. Reinforced probe jacks and durable test leads withstand prolonged usage demands. Advanced circuit design ensures measurement stability even in electromagnetically noisy environments, offering technicians dependable performance for critical detection tasks.
（总字数：中文378字 + 英文341字 = 719字）
