QJ44a直流雙臂電橋
產(chǎn)品概述
QJ44a直流雙臂電橋是一款便攜式精密測(cè)量?jī)x器，采用凱爾文四線制原理設(shè)計(jì)，適用于工礦企業(yè)、實(shí)驗(yàn)室及現(xiàn)場(chǎng)環(huán)境對(duì)直流低值電阻的高精度測(cè)量。該產(chǎn)品無(wú)需額外附件即可完成電機(jī)繞組、變壓器直流電阻、開(kāi)關(guān)接觸電阻等測(cè)量任務(wù)，同時(shí)支持通過(guò)四端夾具擴(kuò)展金屬材料電阻率測(cè)定功能。儀器內(nèi)嵌集成電路電子檢流計(jì)和雙電源系統(tǒng)，具備操作便捷、穩(wěn)定性強(qiáng)的特點(diǎn)，滿(mǎn)足各類(lèi)低阻值場(chǎng)景的測(cè)量需求。16
核心性能
儀器提供0.0001Ω至11Ω的寬量程覆蓋，通過(guò)×0.01至×100五檔量程系數(shù)實(shí)現(xiàn)精準(zhǔn)匹配。采用靈敏度可調(diào)的電子檢流計(jì)，分度值≤1×10-7A/mm，配合1.5V工作電源和9V檢流計(jì)電源，確保測(cè)量過(guò)程穩(wěn)定可靠。其機(jī)械結(jié)構(gòu)采用抗沖擊設(shè)計(jì)，外形尺寸為300×255×150mm，重量約4.5kg，兼顧便攜性與耐用性。特殊設(shè)計(jì)的四端接線法能有效消除導(dǎo)線電阻和接觸電阻對(duì)測(cè)量結(jié)果的影響。27
技術(shù)特點(diǎn)
QJ44a通過(guò)優(yōu)化電路布局實(shí)現(xiàn)0.2級(jí)精度等級(jí)，在5-45℃環(huán)境溫度下保持測(cè)量一致性。獨(dú)創(chuàng)的間歇式電源管理技術(shù)可在測(cè)量0.1Ω以下阻值時(shí)自動(dòng)調(diào)節(jié)功耗，延長(zhǎng)電池壽命。檢流計(jì)配備機(jī)械/電氣雙重調(diào)零功能，支持靈敏度分級(jí)調(diào)節(jié)以適應(yīng)不同測(cè)量場(chǎng)景。針對(duì)電感類(lèi)被測(cè)物，智能操作流程（先通B后通G）有效抑制感應(yīng)電動(dòng)勢(shì)干擾。811
應(yīng)用場(chǎng)景
本產(chǎn)品廣泛應(yīng)用于金屬導(dǎo)體電阻率分析、工業(yè)設(shè)備接觸電阻檢測(cè)、電力系統(tǒng)接地電阻測(cè)量等領(lǐng)域。特別適用于電機(jī)/變壓器生產(chǎn)質(zhì)檢、線纜行業(yè)工藝控制、科研機(jī)構(gòu)材料研究等場(chǎng)景。其野外適應(yīng)能力使其成為地質(zhì)勘探、電力巡檢等移動(dòng)工作的理想工具。1013
Introduction
The QJ44a DC double-arm bridge is a portable measuring device based on Kelvin 4-wire principle, designed for precise low-resistance measurement in laboratories, industrial sites and field environments. With built-in IC electronic galvanometer and dual power supply system, it performs direct measurements on motor windings, transformer DC resistance and switch contact resistance without additional accessories, while supporting material resistivity tests via optional 4-terminal fixtures. Its compact structure (300×255×150mm) and 4.5kg weight ensure excellent portability. 618
Key Features
Featuring 0.0001Ω-11Ω measurement range with five selectable multipliers (×0.01 to ×100), the instrument achieves 0.2-class accuracy through optimized circuit design. The adjustable-sensitivity galvanometer (≤1×10-7A/mm) works with 1.5V main power and 9V auxiliary supply to deliver stable performance. Proprietary four-terminal measurement effectively eliminates lead resistance interference. Automatic power management reduces consumption during sub-0.1Ω measurements. Dual nulling (mechanical/electrical) and stepped sensitivity adjustment enhance operational flexibility. 712
Operational Advantages
This bridge incorporates intelligent workflow for inductive loads (B-G sequential switching) to suppress interference. The rugged casing provides vibration resistance for field use. Clear panel layout includes external power terminals for extended operation. Special attention was given to contact protection - oxidation-prone areas use corrosion-resistant materials with protective coating. The instrument maintains consistency across 5-45℃ temperature range. 1419
Application Fields
Ideal for diverse scenarios including: metal conductivity research, industrial equipment maintenance, power system ground testing. Particularly suitable for quality control in motor/transformer manufacturing, process monitoring in cable production, and scientific material analysis. Its environmental adaptability makes it valuable for geological surveys and mobile power inspections. 1025
QJ44a直流雙臂電橋
的詳細(xì)介紹
本品為攜帶式雙臂電橋，不用附件就可以準(zhǔn)確測(cè)定電機(jī)變壓器直流電阻、開(kāi)關(guān)接觸電阻等，還可借助四端夾具（本廠有售）測(cè)定金屬試樣的材質(zhì)電阻率。型號(hào)前有FM為市電型，無(wú)FM為電池型。
| 型號(hào) |
測(cè)量范圍 |
小步進(jìn) |
準(zhǔn)確度 |
尺度cm3 |
| QJ44 |
10-4～11Ω
|
5mΩ
|
0.2 |
31*26*16 |
| FMQJ44A |
| QJ44A |
10-4～11Ω
|
5mΩ
|
0.1 |
重量kg |
| FMQJ44a |
3 |
歡迎選購(gòu)QJ44a直流雙臂電橋，我們有優(yōu)勢(shì)的價(jià)格，的服務(wù)！公司承諾，所有商品保證原裝正品，一年保修，終身維護(hù)！業(yè)務(wù)咨詢(xún):021-63515606,QQ客服:332318574
|
