ZX21B旋轉(zhuǎn)式電阻箱
產(chǎn)品概述
ZX21B旋轉(zhuǎn)式電阻箱是一款精密調(diào)節(jié)直流電路阻值的實驗室儀器，采用旋轉(zhuǎn)開關(guān)結(jié)構(gòu)設(shè)計，阻值調(diào)節(jié)范圍為0~99.9999kΩ，最小步進0.1Ω。該產(chǎn)品由六個十進電阻盤串聯(lián)組成，每個電阻盤包含五個精密電阻元件，采用康銅和錳銅絲繞制，確保阻值穩(wěn)定性。儀器具有30±5mΩ的低零值電阻特性，適合需要高精度電阻調(diào)節(jié)的場合。產(chǎn)品外形尺寸為200×150×110mm，重量約1.3kg，便于實驗室移動和操作。123
技術(shù)特點
ZX21B采用輕壓力開關(guān)接觸設(shè)計，接觸電阻小且變差穩(wěn)定，確保長期使用可靠性。電阻箱電路與外殼之間絕緣強度可承受50Hz/2000V交流電壓1分鐘測試，絕緣電阻不小于1000MΩ。產(chǎn)品工作環(huán)境要求為溫度+10℃~+35℃，相對濕度30%~80%。當需要小范圍電阻調(diào)節(jié)時，可通過"0"和小示值接線柱連接，有效減小引線電阻影響。儀器在長期存放后如出現(xiàn)接觸不良，可通過清洗轉(zhuǎn)換開關(guān)接觸點與電刷片氧化層恢復(fù)性能。3512
應(yīng)用領(lǐng)域
ZX21B旋轉(zhuǎn)式電阻箱廣泛應(yīng)用于學校電學教學實驗、工廠電子設(shè)備測試及科研單位精密測量領(lǐng)域。在教學場景中，可幫助學生理解電路基礎(chǔ)原理和電阻概念；在工業(yè)領(lǐng)域，適用于電子元器件測試和儀器校準；在科研工作中，能為精密測量提供穩(wěn)定的阻值參考。產(chǎn)品特別適合需要多檔位電阻調(diào)節(jié)的直流電路實驗，通過六個十進盤的組合可精確設(shè)定所需阻值。2711
Product Introduction
The ZX21B rotary resistance box is a precision instrument designed for DC circuit resistance adjustment in laboratory environments. With a resistance range of 0-99.9999kΩ and minimum step of 0.1Ω, it features six decades of resistance switches connected in series. Each decade consists of five precision resistance elements wound with constantan and manganin wires to ensure stable performance. The compact design (200×150×110mm) and lightweight construction (1.3kg) make it highly portable for various experimental setups.1323
Technical Features
This resistance box adopts low-contact-resistance switches with reliable long-term performance. It demonstrates excellent insulation characteristics, withstanding 2000V AC voltage at 50Hz for 1 minute while maintaining insulation resistance above 1000MΩ. The recommended operating environment ranges from +10℃ to +35℃ with 30%-80% relative humidity. For fine resistance adjustment, special terminals are provided to minimize lead resistance effects. The rotary switches allow smooth operation and precise resistance selection, while the durable construction ensures consistent performance over extended periods.51214
Applications
The ZX21B serves multiple purposes in educational, industrial and research settings. In teaching laboratories, it helps demonstrate fundamental electrical principles and Ohm s law applications. Manufacturing facilities utilize this instrument for electronic component testing and equipment calibration. Research institutions employ it as a stable resistance reference for precision measurements. Its versatile decade switching system enables accurate resistance configuration for various DC circuit experiments, making it an essential tool in electrical engineering applications.2711
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