AC5-1直流检流计/AC51

产品概述

AC5-1指针式直流检流计是一款高灵敏度磁电式仪表，专为检测微弱直流电流或电压设计，适用于实验室、科研机构及教学场景。该仪器采用悬丝支撑结构，显著降低机械摩擦对测量精度的影响，可准确测量微安级至纳安级电流（10⁻⁷~10⁻¹⁰A）或毫伏级至微伏级电压（10⁻³~10⁻⁶V）。其便携式设计搭配胶木密封外壳，既保证机械稳定性，又能有效抵御环境灰尘干扰，适合在复杂实验条件下使用。1813

The AC5-1 DC galvanometer is a highly sensitive magnetoelectric instrument designed for detecting微弱DC currents or voltages. It is widely used in laboratories, research institutions, and educational settings. With a suspended wire support structure, it minimizes mechanical friction, enabling precise measurement from microampere to nanoampere ranges (10⁻⁷~10⁻¹⁰A) or millivolt to microvolt levels (10⁻³~10⁻⁶V). Its portable design features a bakelite-sealed casing that ensures stability and protects against environmental contaminants.

技术特点

AC5-1检流计的核心技术包括宽频带低漂移放大电路与双向偏转指针表头，支持中心零位指示，可直观显示电流方向及大小。仪器内置粗测、细测和短路三档功能按钮，用户可通过点动或锁定模式灵活切换量程，兼顾高灵敏度与过载保护。其内阻为50Ω，外临界电阻范围150Ω~14kΩ，适配多种电桥、电位差计等精密仪器作为零位指示器。此外，水平放置设计减少了倾斜误差，提升了测量可靠性。4618

The AC5-1 incorporates a broadband low-drift amplification circuit and a bidirectional pointer meter with center-zero indication, clearly displaying current polarity and magnitude. It features three functional buttons (coarse, fine, and short-circuit) for量程切换和protection against overload. With an internal resistance of 50Ω and external critical resistance ranging from 150Ω to 14kΩ, it is compatible with various bridges and potentiometers as a null detector. The horizontal placement design minimizes tilt-induced errors.

应用场景

该仪器适用于光电效应、生理电信号、温差电动势等微弱信号检测，也可作为直流电桥、电位差计的配套指零仪。在教育领域，其操作简便性使学生能快速掌握基础电学测量原理；在科研中，高重复性和低噪声特性助力精密实验数据采集。典型应用包括记录神经动作电位、材料导电性分析及传感器标定等。11322

Applications span微弱signal detection such as photoelectric effects, bioelectric signals, and thermoelectric EMFs, as well as serving as a null indicator for DC bridges and potentiometers. In education, its user-friendly design facilitates foundational electrical measurements, while its high repeatability and low noise benefit精密scientific research, including neural potential recording and sensor calibration.

操作与维护

使用前需通过机械调零和电气调零确保基准准确，建议预热5分钟以稳定电路性能。测量时通过粗调按钮快速定位信号范围，再切换至细调模式获取精确读数。内置短路按钮可强制归零，用于验零或紧急保护。日常存放应避免强磁场干扰，定期清洁接线柱以维持导电性。仪器尺寸为160×105×150mm，重量约1.5kg，便于携带与安装。41218

Operation requires initial mechanical and electrical zeroing, with a recommended 5-minute预热for circuit stabilization. The coarse/fine buttons enable rapid signal localization and precise measurement, while the short-circuit button强制resets the pointer. Storage should avoid strong magnetic fields, with regular terminal cleaning. Compact dimensions (160×105×150mm) and light weight (1.5kg) enhance portability.

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