QJ44直流雙臂電橋產(chǎn)品介紹（中文版）

QJ44直流雙臂電橋是一款專為精密測量低值電阻設(shè)計的實驗室級測量儀器，采用經(jīng)典的四端法測量原理，有效消除導(dǎo)線電阻和接觸電阻對測量結(jié)果的影響。本產(chǎn)品適用于電力系統(tǒng)、材料研究、工業(yè)檢測等場景，可實現(xiàn)對0.0001Ω至11Ω范圍內(nèi)電阻值的高精度測量，為科研實驗和工程檢測提供可靠數(shù)據(jù)支持。

本產(chǎn)品采用雙橋臂平衡式電路設(shè)計，配備高靈敏度檢流計和精密可調(diào)電阻網(wǎng)絡(luò)，測量分辨率可達0.1μΩ。優(yōu)化的溫度補償系統(tǒng)有效降低環(huán)境溫度波動對測量結(jié)果的影響，確保在10℃-35℃工作環(huán)境下保持穩(wěn)定的測量性能。儀器操作面板布局科學(xué)，配備粗調(diào)、細調(diào)聯(lián)動旋鈕，支持快速平衡調(diào)節(jié)功能，顯著提升測量效率。內(nèi)置的過載保護電路可自動切斷異常電流，有效保護儀器核心元件。

在應(yīng)用領(lǐng)域方面，該設(shè)備可滿足變壓器繞組電阻測量、開關(guān)接觸電阻檢測、金屬材料導(dǎo)電率分析等多種需求。特殊設(shè)計的屏蔽結(jié)構(gòu)能有效抑制外界電磁干擾，配合專用測試夾具，可實現(xiàn)各類異形導(dǎo)體的精準(zhǔn)測量。人性化的機械結(jié)構(gòu)設(shè)計兼顧便攜性與耐用性，主體采用高強度工程塑料框架，關(guān)鍵部件配置防震緩沖裝置，確保儀器在移動使用場景下的可靠性。

設(shè)備維護方面，建議定期使用標(biāo)準(zhǔn)電阻器進行校準(zhǔn)驗證，保持接線端子清潔。當(dāng)環(huán)境濕度超過80%時，建議開啟除濕設(shè)備后再進行測量操作。隨機配備的專用測試線組采用鍍銀銅芯材料，有效降低接觸電阻，建議與配套夾具配合使用以獲得最佳測量效果。

QJ44 DC Double Bridge Product Introduction (English Version)

The QJ44 DC Double Bridge is a laboratory-grade measuring instrument specifically designed for precision measurement of low-value resistance. Utilizing the proven four-terminal measurement principle, this device effectively eliminates the influence of lead resistance and contact resistance on measurement results. Suitable for power systems, material research, and industrial inspection applications, it provides accurate measurements within the range of 0.0001Ω to 11Ω, delivering reliable data support for scientific research and engineering applications.

Featuring a dual bridge arm balanced circuit design, the instrument integrates a high-sensitivity galvanometer and precision adjustable resistor network, achieving measurement resolution up to 0.1μΩ. The optimized temperature compensation system significantly reduces the impact of ambient temperature fluctuations, ensuring stable measurement performance within the operational temperature range of 10℃-35℃. The ergonomic control panel incorporates coordinated coarse/fine adjustment knobs and quick balance function, substantially improving measurement efficiency. Built-in overload protection circuitry automatically interrupts abnormal currents, providing effective protection for core components.

This device addresses various application requirements including transformer winding resistance measurement, switch contact resistance testing, and metal material conductivity analysis. Specially designed shielding structure effectively suppresses electromagnetic interference, while dedicated test fixtures enable accurate measurements on irregular-shaped conductors. The humanized mechanical design balances portability with durability, featuring a high-strength engineering plastic frame and vibration-damping components for reliable performance in mobile usage scenarios.

For maintenance, periodic calibration verification using reference resistors is recommended, along with keeping terminal contacts clean. When ambient humidity exceeds 80%, dehumidification equipment should be activated prior to measurement. The included silver-plated copper test leads minimize contact resistance, and optimal measurement results are achieved when used with matching fixtures.

（注：中英文版本各約500字，完全避免使用絕對化表述及認(rèn)證類詞匯，聚焦產(chǎn)品功能特性描述。技術(shù)參數(shù)均以實際產(chǎn)品為準(zhǔn)，本示例僅作格式參考。）