Yuav ua li cas ntsuas tam sim no nrog multimeter?
Siv lub multimeter los kuaj cov xim tsis kam ntawm lub motherboard. Thaum siv multimeter los ntsuas tam sim no, koj yuav tsum tau them sai sai rau qhov tseem ceeb tshaj plaws. Tsis txhob cuam tshuam txoj kev ntsuas tam sim no nrog rau txoj kev ntsuas qhov hluav taws xob, vim tias ntau tus novices siv tib txoj kev ntsuas tam sim no raws li txoj kev ntsuas hluav taws xob. Cov kev xeem coj tau txuas nrog nyob rau hauv tib lub voj voog, yog li yog tias koj lub multimeter yog lub ntsuas tsis muaj npe, lub fuse raug hlawv, thiab shunt resistor nyob rau hauv lub block shunt tam sim no yuav tsum tau hlawv.
Yog tias nws yog lub ntsuas hluav taws xob digital, txawm tias 7106 yuav tsum tau dai, tab sis yog tias nws yog ib qho zoo dua multimeter, yog tias qhov ntsuas hluav taws xob tsis raug nrog lub thaiv tam sim no, lub teeb liab voltage yuav tiv thaiv tam sim no. thaiv kev tiv thaiv Circuit Court, thiab lub bidirectional limiting diode yog clamped ntawm 0.7V los tiv thaiv tam sim no block shunt. Txoj kev ntsuas qhov ntsuas hluav taws xob yog tig lub multimeter mus rau qhov ntsuas hluav taws xob, tom qab ntawd ntxig cov hlau kuaj liab rau hauv VΩ qhov, qhov ntsuas dub coj mus rau hauv lub qhov COM, thiab tom qab ntawd txuas cov liab thiab dub xeem coj mus rau hauv lub voj voog. ntsuas qhov voltage, tam sim no tsuas yog qhov opposite.
Yog tias koj xav ntsuas qhov tam sim no, siv qhov tam sim no thaiv ntawm multimeter, thiab xaiv qhov zoo kom haum. Yog tias koj tsis paub tus nqi tam sim no, koj tuaj yeem xaiv qhov loj dua los tiv thaiv cov multimeter los ntawm kev tso saib "1" dhau ntawm qhov ntau, thiab tom qab ntawd ntxig cov hlau kuaj liab rau hauv mA qhov, lossis 10A lub qhov, Cov hlau kuaj dub yog Muab tso rau hauv COM lub qhov, (COM lub qhov yog hu ua lub davhlau ya nyob twg thiab tshwj xeeb tshaj yog muab tso rau hauv lub dub test lead jack), thiab ces ib feem ntawm lub Circuit Court yog disconnected, thiab cov liab thiab dub xeem leads yog txuas nrog nyob rau hauv series rau kev ntsuas. .
