RT2232A數(shù)字微歐計(jì)(數(shù)字電橋)
RT2232A數(shù)字微歐計(jì)產(chǎn)品中文介紹
RT2232A數(shù)字微歐計(jì)是一款采用CMOS大規(guī)模集成電路與高精度恒流源設(shè)計(jì)的便攜式數(shù)字儀表，具備41/2位分辨率并通過(guò)5位LED顯示屏直觀呈現(xiàn)測(cè)量結(jié)果。該儀器適用于測(cè)量各類低阻值電阻，如線圈電阻、電動(dòng)機(jī)及變壓器繞組電阻、電纜導(dǎo)線電阻、開(kāi)關(guān)觸點(diǎn)接觸電阻等，可滿足工廠、實(shí)驗(yàn)室等場(chǎng)景的精密測(cè)量需求。其核心特點(diǎn)包括自動(dòng)/手動(dòng)量程切換功能（覆蓋0.1μΩ至1.9999kΩ范圍）、采樣速度2-3次/秒，以及溫度穩(wěn)定性（環(huán)境溫度每變化10℃附加誤差不超出基本誤差值）。儀器采用四端測(cè)量法，通過(guò)恒流源輸出電流在待測(cè)電阻上產(chǎn)生壓降并由高靈敏度數(shù)字電壓表檢測(cè)，有效消除引線電阻干擾。操作時(shí)需注意預(yù)熱60分鐘以確保穩(wěn)定性，且對(duì)帶電感的電阻測(cè)量需遵循特定步驟以避免反電動(dòng)勢(shì)沖擊。146
RT2232A Digital Micro-Ohmmeter Product Description in English
The RT2232A Digital Micro-Ohmmeter is a 4½-digit portable instrument integrating CMOS LSI technology and precision constant current sources, featuring a 5-segment LED display for clear readability. Designed for low-resistance measurements (0.1μΩ to 1.9999kΩ), it supports applications including coil resistance testing, motor/transformer winding analysis, cable conductor evaluation, and contact resistance checks for electrical components like switches and connectors. Key functionalities encompass dual-range mode (auto/manual), rapid sampling at 2-3 measurements per second, and temperature compensation to maintain accuracy within ±0.1% of reading under varying conditions. The four-terminal Kelvin measurement method ensures reliable results by minimizing contact resistance effects. Users should allow 60-minute warm-up for optimal performance and follow specific protocols when measuring inductive loads. Its compact design (240×320×105mm) and ≤3kg weight enhance portability for field or lab use. 158
技術(shù)原理與操作注意事項(xiàng)
儀器通過(guò)恒流源輸出穩(wěn)定電流至被測(cè)電阻，利用高精度數(shù)字電壓表（靈敏度0.1μV）采集電壓降并轉(zhuǎn)換為電阻值顯示。測(cè)量時(shí)需區(qū)分電壓端（Hi/Lo）與電流端（I+/I-）的正確連接方式，對(duì)于導(dǎo)線或金屬鉚接電阻測(cè)試，建議采用專用夾具以確保接觸點(diǎn)壓力均勻。儀器內(nèi)置過(guò)載保護(hù)功能，超量程時(shí)會(huì)顯示"OL"提示，且具備極性自動(dòng)識(shí)別功能。長(zhǎng)期存放后首次使用時(shí)建議通電3-4小時(shí)以恢復(fù)性能穩(wěn)定性。146
Technical Specifications & Usage Guidance
The device operates on 220V±10% AC power (50Hz) with ≤30W consumption, and incorporates protective features such as overload indication ("OL" display) and automatic polarity detection. For accurate measurements, the voltage sensing terminals (Hi/Lo) must be placed closer to the test point than current injection terminals (I+/I-) to eliminate lead resistance errors. Specialized test leads are recommended for conductor resistance measurements to ensure minimal contact resistance. When handling inductive loads, allow delayed disconnection post-measurement to dissipate stored energy. The instrument s maintenance includes periodic verification using standard resistors (0.001Ω–1kΩ) to confirm calibration status. 159
RT2232A數(shù)字微歐計(jì)(數(shù)字電橋)
的詳細(xì)介紹
0.1µ～1.9999kΩ
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