Kev siv Multimeter hauv Tsev Kho Khoom Siv Hauv Tsev
Kev siv cov multimeters hauv kev kho cov khoom siv hauv tsev Thaum siv multimeters, koj yuav tsum tau xyuam xim rau:
1). Txheeb xyuas cov haujlwm ntawm txhua cov ntaub ntawv ntawm multimeter.
2). Ntsuas peb mus rau plaub qhov kev tawm tsam thiab sau lawv.
3). Ntsuas AC voltage thiab sau nws.
4). Ntsuas qhov DC voltage thiab sau nws.
Multimeter: Nws yog siv los ntsuas AC thiab DC voltage, tam sim no, DC tsis kam, thiab transistor tam sim no amplification lej, thiab lwm yam. Tam sim no muaj ob hom digital multimeters thiab mechanical multimeters.
1) Digital multimeter
Ntawm lub multimeter, koj yuav pom lub pob qhov rooj hloov pauv raws li qhia hauv daim duab, thiab lub pob qhov rooj yog hais txog lub iav qhov chaw ntawm qhov khoom thib ob.
V ~: Qhia cov iav rau ntsuas AC voltage.
V-: Qhia cov iav rau ntsuas DC voltage.
MA: Qhia cov iav rau ntsuas DC voltage.
Ω (R): Qhia txog qhov ntsuas qhov tsis kam.
HFE: Qhia qhov ntsuas qhov ntsuas tsis kam.
Tus cwj mem liab ntawm lub multimeter qhia tau hais tias nws txuas nrog tus ncej zoo ntawm lub voj voog sab nraud, thiab tus cwj mem dub qhia tau hais tias nws txuas nrog tus ncej tsis zoo ntawm sab nraud Circuit Court.
Qhov zoo: Anti-magnetic. Kev nyeem ntawv yooj yim thiab raug (digital zaub) ......
2) Mechanical multimeter
Cov tsos ntawm ib tug neeg kho tshuab multimeter yog me ntsis txawv ntawm ib tug digital meter, tab sis lub iav qhov rooj thiab iav txoj hauj lwm ntawm ob yog zoo sib xws.
Ntawm lub tshuab saib, koj yuav pom ib lub xov tooj raws li qhia hauv daim duab, thiab muaj yim teev ntawm lub dial:
Ib qho cim nrog "Ω" yog qhov ntsuas siv los ntsuas qhov tsis kam.
Cov cim nrog "~" yog cov nplai siv los ntsuas AC thiab DC voltages thiab DC tam sim no.
Ib qho cim nrog "HFE" yog qhov ntsuas siv thaum ntsuas lub triode.
Cuam tshuam nrog "LI" yog qhov ntsuas ntsuas qhov ntsuas tam sim no thiab qhov hluav taws xob ntawm cov khoom thauj.
Ib qho cim nrog "DB" yog qhov ntsuas rau ntsuas qib.
3) Kev siv multimeter
①Digital multimeter: Ua ntej ntsuas, hloov mus rau qhov ntsuas. Nws yuav tsum tau muab sau tseg tias qhov ntau yam cim rau ntawm txoj hauj lwm yog tus nqi siab tshaj plaws.
②Mechanical multimeter: Cov txheej txheem ntsuas tam sim no thiab qhov hluav taws xob yog tib yam li cov qauv lej, tab sis thaum ntsuas cov cathode, kev nyeem ntawv yuav tsum tau muab faib los ntawm tus nqi ntawm lub iav kom tau txais tus nqi ntsuas. Piv txwv li: lub iav tam sim no yog "X100" thiab kev nyeem ntawv yog 200, Cov lus nug ntsuas yog 200X100=20000Ω=20K, qhov "Ω" nplai ntawm lub dial yog los ntawm sab laug mus rau sab xis, los ntawm loj mus rau me me, thaum lwm tus yog los ntawm sab laug mus rau sab xis, los ntawm me mus rau loj
4). Cov kev ceev faj:
① Kho qhov "zero point" (tsuas yog rau cov neeg kho tshuab saib xwb). Ua ntej siv lub moos, ua ntej xyuas tias tus pointer nyob ntawm "zero position" ntawm sab laug kawg. Kho cov ntsia hlau kom lub pointer taw tes rau xoom.
②Thaum siv multimeter, nws yuav tsum muab tso rau kab rov tav (tsuas yog rau cov tshuab)
③ Ua ntej qhov kev ntsuam xyuas, txiav txim siab cov ntsiab lus ntsuas, tig lub pob qhov hloov pauv mus rau qhov sib thooj rau qhov ntsuas ntsuas, kom tsis txhob hlawv lub taub hau ntsuas, yog tias koj tsis paub qhov luaj li cas ntawm qhov ntsuas lub cev, pib qhov ntsuas nrog ib loj ntau thawj.
④ Cov ntawv xeem yuav tsum raug muab tso rau hauv cov khoom sib xws.
⑤ Thaum lub sij hawm kuaj, tsis txhob tig lub iav hloov pob qhov rooj arbitrarily.
⑥ Tom qab siv, nco ntsoov kho qhov hloov pauv ntawm qhov ntsuas qhov tsis siv mus rau qhov siab tshaj plaws ntawm AC voltage.
⑦ Thaum ntsuas DC voltage thiab tam sim no, them sai sai rau qhov zoo thiab qhov tsis zoo ntawm qhov hluav taws xob, cov kev taw qhia ntws ntawm qhov tam sim no, thiab txuas (thaum) kom raug nrog kev sim ua.
