Kuv yuav ua li cas yog tias lub multimeter tawg thiab ntsuas tsis tau qhov voltage?
ib. Qhov txhaum tshwm sim thiab ua rau DC voltage iav ntawm tus pointer multimeter
1. Lub moos saib tes tsis muaj qhov taw qhia
Cov node ntawm qhov hloov ntawm qhov voltage yog desoldered; tus multiplier resistor ntawm qhov tsawg kawg nkaus ntau yam iav yog disconnected los yog puas.
2. Qee qhov chaw tsis ua haujlwm, tab sis lwm qhov haujlwm ua haujlwm: qhov hloov pauv hloov tsis zoo lossis cov neeg sib cuag raug hlawv; kev tiv tauj thaiv ntawm qhov hloov pauv hloov thiab cov resistor ntxiv raug txiav los yog desoldered.
3. Kev ua yuam kev loj hauv cov khoom me me, qhov yuam kev me me hauv ntau qhov loj, kev sib txuam ua haujlwm tsis ua haujlwm hauv qhov me me, xws li tus nqi sib txawv, luv luv Circuit Court, thiab lwm yam.
4. Tom qab kuaj xyuas rau qee yam iav, qhov sib npaug ntawm qhov sib txawv ntawm qhov ntau yog desoldered los yog txiav tawm thaum txhua lub zog tsis ua haujlwm.
ob. Cov tsos mob thiab yog vim li cas rau qhov tsis ua hauj lwm ntawm cov ntaub ntawv AC voltage ntawm tus pointer multimeter
1. Lub pointer swings me me thiab lub rectifier tawg.
2. Qhov yuam kev yog li 50 feem pua tsawg. Ib qho ntawm tag nrho-yoj rectifiers tau tawg lawm.
3. Qhov taw qhia tus nqi ntawm txhua lub iav yog qhov tsawg, kev ua haujlwm ntawm lub rectifier tsis zoo, thiab qhov rov qab tsis kam txo.
peb. Fault phenomena thiab ua rau digital multimeter DC voltage file
1. Cov ntaub ntawv DC voltage tsis ua haujlwm
Txheeb xyuas seb qhov hloov pauv hloov pauv puas nyob rau hauv kev sib cuag tsis zoo lossis qhib Circuit Court;
Xyuas seb qhov kev tiv thaiv kev sib txuas hauv series nrog DC voltage input circuit yog qhib Circuit Court tsis ua hauj lwm;
2. Tus nqi tso tawm ntawm qhov ntsuas hluav taws xob DC yog qhov loj heev
Xyuas seb tus nqi tsis kam ntawm qhov voltage faib resistor yog sib npaug rau tus nqi nominal;
Xyuas seb qhov hloov pauv hloov pauv puas muaj qhov tshwm sim cascading.
plaub. Cov tsos mob thiab ua rau digital multimeter AC voltage faults
1. Cov ntaub ntawv AC voltage tsis ua haujlwm
Txheeb xyuas seb qhov hloov pauv hloov pauv puas muaj kev sib cuag tsis zoo;
Tshawb xyuas seb lub tshuab ua haujlwm sib xyaw ua haujlwm hauv AC voltage ntsuas Circuit Court puas puas lawm;
Xyuas seb lub series resistor ntawm cov zis kawg ntawm lub rectifier yog desoldered los yog tus nqi kuj yuav loj dua;
Xyuas seb lub lim capacitor ntawm cov zis kawg ntawm lub rectifier puas tawg thiab luv-circuited.
2. Tus nqi tso tawm ntawm AC voltage ntsuas jumps thiab nyeem tsis tau
Xyuas seb lub hauv av (COM davhlau ya nyob twg) cov hlau lead ntawm cov txheej thaiv ntawm lub hau npog yog txiav los yog poob;
Xyuas seb lub lim capacitor ntawm lub rectifier tso zis kawg yog unsoldered thiab qhib Circuit Court los yog lub capacitance ploj;
Tshawb xyuas seb qhov kev ua haujlwm sib xyaw ua haujlwm ntawm AC voltage ntsuas Circuit Court puas puas lawm;
Tshawb xyuas seb qhov hloov kho qhov hloov pauv hauv AC voltage ntsuas Circuit Court puas puas lossis tsis zoo.
3. Qhov ntsuas hluav taws xob AC qhia tau tias muaj qhov yuam kev loj
Xyuas seb qhov kev hloov kho tau ntawm AC voltage ntsuas Circuit Court puas ua haujlwm tsis zoo;
Xyuas seb qhov kev hloov kho hauv AC / DC converter circuit puas puas lossis muaj kev ua haujlwm tsis zoo.
