QJ84A数字直流(单)电桥
产品概述
QJ84A数字直流电桥是一款高精度便携式电阻测试仪器，采用先进的桥式线路设计和精密合金绕线电阻基准，是传统凯尔文电桥的升级产品。它兼具数字仪表的便捷性与经典电桥的稳定性，适用于工矿企业、科研单位及大专院校对直流低值电阻的精密测量。该仪器采用4½位LCD大屏显示，测量范围覆盖0-20kΩ，最小分辨率达1μΩ，采样速度仅需0.4秒，可快速输出稳定数据。内置可充电电池，支持无交流电源的现场使用，操作简便，无需外接检流计即可实现高精度测量。269
核心特点
QJ84A数字直流电桥以高稳定性和可靠性为核心，主要元器件采用进口集成电路，并经过特殊配选与老化处理，确保长期性能稳定。其七档量程设计覆盖广泛电阻值，分辨力精细，测试电流根据量程自动适配（如20mΩ档电流≤100mA）。仪器具备自动量程功能，简化操作流程，用户仅需连接被测电阻并选择量程即可完成测量。大尺寸数字显示清晰醒目，支持交直流两用供电（AC220V或DC6V充电电池），适应实验室或户外场景。5816
应用场景
该电桥特别适合电线电缆行业芯线电阻测试，以及电动机、变压器绕组电阻等低阻值测量任务。其抗干扰设计有效应对带有电感的直流电阻测试，防止反电势损坏设备。紧凑的机身结构（320mm×280mm×170mm）与轻量化设计便于携带，满足车间、生产线或科研现场的移动需求。此外，仪器可替代传统QJ42、QJ44等双臂电桥，提升工作效率。11317
Product Introduction
The QJ84A Digital DC Bridge is a portable resistance measuring instrument designed for precision testing of low-value DC resistors. Based on an advanced bridge circuit and precision alloy-wound resistors, it combines the convenience of digital meters with the reliability of classic Kelvin bridge technology. Featuring a 4½-digit LCD display, it covers a wide range from 0 to 20kΩ with a resolution as fine as 1μΩ. The sampling speed is 0.4 seconds, delivering stable readings swiftly. Equipped with rechargeable batteries, it supports field use without AC power and requires no external galvanometer for high-accuracy measurements.2622
Key Features
With imported ICs and optimized aging processes, the QJ84A ensures long-term stability across seven ranges. Its auto-ranging function simplifies operation—users only need to connect the resistor and select the range. The large display enhances readability, while dual power options (AC220V or DC6V batteries) cater to lab and field environments. Test currents adapt intelligently per range (e.g., ≤100mA for 20mΩ), balancing speed and safety. The compact chassis (320mm×280mm×170mm) emphasizes portability without compromising performance.5816
Applications
Ideal for wire/cable core resistance testing and motor/transformer winding measurements, the QJ84A excels in low-resistance scenarios. Its anti-interference design safeguards against back EMF during inductive load tests. The instrument replaces traditional QJ42/QJ44 bridges, streamlining workflows in workshops, production lines, or research sites. Whether in controlled labs or rugged field conditions, it delivers consistent results with minimal setup.11317
QJ84A数字直流(单)电桥
的详细介绍
QJ84A型数字便携式宽量程直流双臂电桥基本参数与QJ84相同。采用电池供电、适应无交流电源的现场使用。是我厂以电桥线路为基础，并用精密合金绕线电阻为基准的凯尔文电桥更新换代产品。它们不仅具有数字万用表同样简便、快速、醒目的特点。同时又继承了凯尔文（双臂电桥）电桥准确、稳定、可靠的优点。是工矿企业、科研单位、大专院校、计量部门对各类直流低值电阻作精密测量的理想产品。 型号 QJ84A数字直流(双臂)电桥(便携式) 测量范围 0-20kΩ七档量程 小分辨力 1μΩ 量程 20mΩ 200mΩ 2Ω 20Ω 200Ω 2kΩ 20kΩ 测量范围 0-19.999mΩ 0-199.99mΩ 0-1.9999Ω 0-19.999Ω 0-199.99Ω 0-1.9999kΩ 0-19.999kΩ 分辨力 1μΩ 10μΩ 100μΩ 1mΩ 10mΩ 100mΩ 1Ω 测试电流 1A 1A 100mA 100mA 10mA 1mA 100μA 准确度等级 0.5% 0.1% 0.05% 0.05% 0.05% 0.05% 0.05% 显示位数 4? 位LED数码管 电源 交直流两用电源AC220V 50Hz / DC6V（5节镍氢可充电电池组合） 外型尺寸 (W)320 mm×(H)280 mm×(D)170mm 重量 6kg
欢迎选购QJ84A数字直流(单)电桥，我们有优势的价格，的服务！公司承诺，所有商品保证原装正品，一年保修，终身维护！业务咨询:021-63515606,QQ客服:332318574
|
