Yuav ua li cas ntsuas kab xau nrog multimeter? Yuav ua li cas txheeb xyuas cov dej xau nrog multimeter
Hais lus nruj me ntsis, kev ntsuas ntawm kab hluav taws xob tiv thaiv kab hluav taws xob seb qhov xau yuav tsum siv lub rooj sib tsoo, lub rooj sib tw yog sib npaug rau 1000v lossis 500v lub tshuab hluav taws xob, cov xau tam sim no los ntawm cov lus co hauv cov qauv ntsuas, ntawm tus resistor los tsim ib qho piv txwv voltage teeb liab. Feem ntau, qhov ruaj khov ntau dua 0.3 megohms yog tsim nyog.
Multimeter sab hauv roj teeb 9v rau 15v, tiv thaiv iav tsuas tuaj yeem txiav txim siab luv luv, kev txiav txim siab ntxhib.
Qhov tseeb, lawv tus kheej ua tib zoo soj ntsuam kom xav tias cov kab tawg puas muaj teeb meem tuaj yeem ua tib zoo qhib lub thawv kab, yog qhov teeb meem hauv lub thawv, los ntawm rub, khob kom saib xyuas cov ntawv pov hwm xau. Yog hais tias cov yeeb nkab hlau thiab dej, hlau rwb thaiv tsev hauv cov yeeb nkab tsis zoo, txhawm rau txiav txim siab qhov chaw, yuav tsum tau hloov txoj kab.
1, kev ntsuas fais fab: kaw kaw tag nrho cov khoom siv hluav taws xob, nrog rau cov ntaub ntawv multimeter RX10K, tus cwj mem txais kev ntsuas hluav taws xob, lwm tus cwj mem hauv av (lossis kais), yuav tsum qhia qhov tsis kam ntawm infinity, txwv tsis pub tawm.
2, them nqi ntsuas: nrog ib tug multimeter 250 volts AC voltage cov ntaub ntawv, ntsuas qhov xav tias leakage ntawm lub plhaub hlau ntawm cov khoom, ib tug cwj mem txuas nrog lub plhaub, lwm yam cwj mem av (los yog kais), tus pointer qhia ib tug voltage siab tshaj {{2 } } volts nruab nrab, hloov AC 50-volt iav, yog tias lub zog hluav taws xob kom paub meej tias siab dua 30 volts yog qhov xau, qis dua 30 volts yog qhov qub, thiab tom qab ntawd xoom, hluav taws xob hluav taws xob ntsaws kab rau hauv kev ntsuas rov qab tuaj yeem txiav txim siab ib zaug ntxiv. Yog tias cov khoom siv hluav taws xob tau lees paub tias siab dua 30 volts, qhov xau yog qis dua 30 volts.
3, hluav taws kub thiab xoom kab (los yog hluav taws kub thiab hluav taws) nruab nrab ntawm kev ntsuas qhov to: kaw thiab txiav tag nrho cov khoom siv hluav taws xob, ntsuas qhov kev tiv thaiv ntawm qhov hluav taws kub thiab xoom kab yuav tsum yog infinite, txwv tsis pub nws yog qhov to. Cov txheej txheem saum toj no ntawm kev daws teeb meem raug ntawm 99.9%, yooj yim, nrawm, siv tau, thiab megohm tshwj xeeb tuav lub rooj tsuas yog ua qhov project yuav tsum tau siv, kev saib xyuas ntawm kev siv tsis zoo, tsuas yog kev ntsuas multimeter kom paub meej tias qhov zoo, tab sis txoj kab yog tiag tiag ib tug to, siv co lub rooj, tab sis lub multimeter tsis ntsuas to
Teeb pom kev zoo kab xau ua rau cov xaim lossis cov khoom siv hluav taws xob rwb thaiv tsev los ntawm kev puas tsuaj sab nraud; ob yog cov kab los ntawm kev ua haujlwm ntev, uas ua rau cov rwb thaiv tsev laus thiab deterioration; peb yog txoj kab los ntawm kev ya raws los yog kev ua qias tuaj, uas ua rau muaj kev puas tsuaj tsis zoo.
Leakage fault kho thawj zaug txiav txim seb qhov to yog tseeb. Muaj pointer multimeter R × 10k thaiv kev ntsuas kev ntsuas kev tiv thaiv kev tiv thaiv, lossis digital multimeter muab tso rau hauv AC tam sim no thaiv (lub sijhawm no sib npaug rau ammeter), txuas nrog hauv series ntawm lub ntsiab hloov, tig rau tag nrho cov keyboards, tshem tawm tag nrho cov loads. (nrog rau qhov muag teev). Yog tias muaj qhov tam sim no, nws txhais tau hais tias muaj qhov tshwm sim xau. Txiav txim siab txoj kab xau, koj tuaj yeem tshawb xyuas ntxiv raws li cov kauj ruam hauv qab no.
(1) txiav txim seb puas yog theem kab thiab xoom kab to, los yog theem kab thiab lub ntiaj teb to, los yog ob qho tib si. Txoj kev yog txiav tawm ntawm xoom kab, yog hais tias lub ammeter indications tsis hloov, nws yog cov theem kab thiab lub ntiaj teb to; yog tias qhov ntsuas ammeter yog xoom, nws nyob nruab nrab ntawm theem kab thiab xoom kab to; ammeter qhia ua me me tab sis tsis xoom, nws yog nyob nruab nrab ntawm theem kab thiab xoom kab, theem kab thiab lub ntiaj teb yog to.
(2) txiav txim siab txog kev xau. Tshem lub kais fuse los yog rub lub Circuit Court breaker, yog hais tias lub ammeter qhia tsis hloov, ces lub tsheb thauj mus los; ammeter qhia yog xoom, ces cov ceg to; ammeter qhia ua me me tab sis tsis xoom, tom qab ntawd nws pom tias yog lub tsheb npav, ceg yog to.
(3) Tshawb nrhiav qhov to taub. Tom qab cov kev txheeb xyuas saum toj no, thiab tom qab ntawd txuas ntxiv txuas cov kab teeb thiab lub teeb hloov pauv, thaum tshem tawm qhov hloov pauv, lub ammeter qhia tias rov qab mus rau xoom, cov ceg kab xau; Yog hais tias nws ua me me, ces qhov no ceg kab to, muaj ib tug to nyob rau lwm qhov; Yog hais tias tag nrho cov teeb thiab lub teeb hloov tawm, lub ammeter qhia tias tsis hloov, ces qhov seem ntawm lub cev kab xau. Sequentially nqaim lub peev xwm ntawm qhov kev huam yuaj, koj tuaj yeem tshawb xyuas qhov seem ntawm cov kab txuas txuas ntxiv, thiab cov xov hlau los ntawm cov phab ntsa thiab lwm qhov chaw seb puas muaj qhov xau. Tom qab pom qhov to ntawm qhov to, qhov ua txhaum ntawm qhov to yuav tsum raug tshem tawm raws sijhawm.
