Most in - circuit test fixtures use spring - loaded probes and are vacuum actuated 很多在線測試固定裝置是帶有彈簧的探針或者采用真空啟動的。
The tr - 518f board tester is developed to meet the industry needs for sophisticated in - circuit test capability 元件開路空焊問題的先進(jìn)測試機(jī)種。此外,
To perform an in - circuit test , you need a test fixture that connects the circuit nodes on the board under test to the tester 為了完成在線測試,你需要一個(gè)測試固定裝置,它可以將被測電路板上的節(jié)點(diǎn)連接到測試設(shè)備上。
And , when coupled with functional testing , the fault coverage for the entire process is as good as or better than in - circuit testing alone 加上功能測試,這個(gè)過程中檢測到的故障率要比單獨(dú)進(jìn)行在線測試故障發(fā)現(xiàn)率大。
Because most of the faults found at board test are manufacturing defects , fault coverage for mda tests is nearly as good as fault coverage for in - circuit tests 因?yàn)樵诎寮墱y試中發(fā)現(xiàn)的大部分故障都是生產(chǎn)缺陷,生產(chǎn)缺陷分析測試到的故障幾乎都可以覆蓋在線測試所發(fā)現(xiàn)的問題。
百科解釋
In-circuit test (ICT) is an example of white box testing where an electrical probe tests a populated printed circuit board (PCB), checking for shorts, opens, resistance, capacitance, and other basic quantities which will show whether the assembly was correctly fabricated. It may be performed with a bed of nails type test fixture and specialist test equipment, or with a fixtureless in-circuit test setup.