Tiv thaiv multimeter pointer dabtsi yog khoov thiab lub taub hau kub
Txhawm rau tiv thaiv cov xwm txheej zoo li no, ua tib zoo saib cov teeb meem hauv qab no thaum siv multimeter:
(1) Ua ntej ntsuas, kwv yees qhov loj ntawm qhov ntsuas thiab teeb tsa qhov hloov pauv mus rau qhov tsim nyog cov iav.
Yog tias koj tsis paub meej txog qhov loj ntawm qhov ntsuas, koj tuaj yeem ua ntej hu xov tooj mus rau qhov siab tshaj plaws iav, thiab maj mam mus rau qhov tsim nyog cov iav.
Nco ntsoov tias thaum ntsuas cov khoom ntsuas loj nrog lub iav me me, nws muaj peev xwm khoov tus taw tes.
(2) Thaum ntsuas qhov tsis kam, lub voj voog nyob rau hauv kev sim yuav tsum raug txiav tawm ntawm lub hwj chim mov.
3) Nws yog txwv tsis pub tig qhov hloov pauv thaum ntsuas qhov hluav taws xob siab lossis siab tam sim no. Txhawm rau kom tsis txhob muaj kev sib cuag arc, kev puas tsuaj rau qhov hloov.
4) Thaum ntsuas electrolytic capacitors, luv-circuit thiab tso tawm ua ntej ntsuas.
5) Thaum siv lub multimeter tsis raug, lub taub hau meter yuav raug hlawv.
Kev tiv thaiv kev tiv thaiv: Txuas ob lub silicon diodes nyob rau hauv parallel nrog qhov zoo thiab qhov tsis zoo ntawm lub taub hau 'meter' los tiv thaiv nws (ib qho rau pem hauv ntej, ib qho rov qab sib npaug).
Silicon diode ntawm qhov hluav taws xob feem ntau ntau dua {{0}}}.5V, qis dua 0.5V silicon diode rau pem hauv ntej kuj loj heev, tus thawj sab hauv tsis kam ntawm lub 'meter' lub taub hau muaj kev cuam tshuam me me, qhov tseem ceeb negligible.
Thaum kev ntsuas tsis raug, qhov hluav taws xob nce siab yuav ua rau silicon diode rau pem hauv ntej tsis kam txo, feem ntau ntawm cov tam sim no shunted los ntawm diode, ua lub luag haujlwm ntawm kev tiv thaiv lub taub hau meter.
