QS28A 万能电桥
QS28A万能电桥产品介绍(中文)
QS28A万能电桥是一款便携式多功能测量仪器,适用于电容、电感和电阻的精确测量。该产品采用桥式测量原理,内置信号源和选频式交流指零仪,支持麦氏、海氏、惠氏等多种桥路切换,能够满足工矿企业、大专院校等不同场景的测量需求。测量范围覆盖1pF至1100μF电容、1μH至110H电感以及0.01Ω至11MΩ电阻,具备较宽的频率适应性和较高的测量精度。仪器采用轻量化设计(尺寸29×20×20cm,重量3.6kg),内置6节2号电池和9V叠层电池供电,便于现场使用。相比前代产品,QS28A增加了10kHz测试频率选项,并优化了读数盘设计,有效提升了测量分辨率和操作便捷性。157
QS28A Universal Bridge Product Introduction (English)
The QS28A Universal Bridge is a portable multi-functional measuring instrument designed for precise measurement of capacitance, inductance, and resistance. Utilizing bridge measurement principles, it incorporates built-in signal sources and selective frequency AC null detectors, supporting multiple bridge circuit configurations including Maxwell, Hay, and Wheatstone bridges. With measurement ranges spanning 1pF-1100μF capacitance, 1μH-110H inductance, and 0.01Ω-11MΩ resistance, it demonstrates broad frequency adaptability and reliable measurement performance. The compact design (29×20×20cm, 3.6kg) features dual power supply with six AA batteries and one 9V battery, ensuring field operation convenience. As an upgraded version, the QS28A introduces 10kHz test frequency option and improved dial mechanism for enhanced measurement resolution and user experience. 6913
产品技术特点
该仪器采用模块化电路设计,晶体管振荡器提供稳定的1kHz±10%测试信号,选频放大器可有效抑制干扰信号。测量系统包含8档量程切换功能,针对不同元件类型自动优化测量参数。损耗测量功能支持Q值(0-1.1)和D值(0-0.1/0-11)双模式显示,满足各类电子元件的损耗特性分析需求。仪器残余阻抗控制在较低水平(电容约2pF,电感约0.1mH),确保小量程测量的准确性。特别设计的直流偏置接口可扩展对有极性电容和铁芯电感的测量能力。21221
Key Technical Features
The instrument adopts modular circuit design with transistor oscillator providing stable 1kHz±10% test signal, while frequency-selective amplifier effectively suppresses interference. The 8-range measurement system automatically optimizes parameters for different component types. Dual-mode loss measurement (Q value 0-1.1 and D value 0-0.1/0-11) supports comprehensive component characterization. With low residual impedance (approx. 2pF capacitance, 0.1mH inductance), it ensures accuracy in small-range measurements. The dedicated DC bias interface extends measurement capability for polarized capacitors and iron-core inductors. Special attention has been paid to ergonomic design with clearly labeled terminals and intuitive operation logic. 3815
QS28A 万能电桥
的详细介绍
QS-18A型万能电桥是一种轻便携带式多用电桥,能够迅速地对电容、电感、电阻元件进行测量,内附晶体管振荡器和指另放大器,对测量结果能直接进行读数,平衡迅速,使用方便,特别适合于工矿企业和修理部门作为一般测试设备。
简要技术指标
基本误差(按量程大值计)
电 容(CX) 0.5PF-100PF ±2%±(0.3PF) ,100PF-100mF ±1%, 100mF-1100mF ±2%
电 感(LX) 0.2uH-10mH ±2%±(0.3uH)
10mH-10H ±1%,10H-110H ±2%,电 阻(RX)
10mΩ-1Ω ±2%±(10 mΩ)1Ω-1 MΩ ±1%
1MΩ-10 MΩ ±2%
电桥残余阻抗:电容约2PF,电感约0.1mH,电阻约1mW
损耗测量范围:Q值从0-1.1 Q=1/D
D值从0-0.1,0-11
电桥内部振荡器:频率:1KC±10%
输出功率:>10mw
消耗电路;约5mA
电桥内部放大器:放大倍数>1500
噪音约100mv
消耗电流:约5mA
本电桥内部振荡器和指另放大器均共用2号平电池6只9V为供电电源,在正常电源,在正常工作情况时总工作电流约10mA,在测量直流电阻时桥路电源由150欧保护电阻和9V电池串联供给,电桥平衡时由电表指零。
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