Txoj kev ntsuas capacitance siv lub pointer multimeter
Xaiv qhov Rx1k lossis Rx100 ntau yam rau lub pointer multimeter, nrog rau cov hlau lead dub txuas nrog rau tus ncej zoo ntawm lub capacitor thiab cov hlau lead liab txuas nrog tus ncej tsis zoo ntawm lub capacitor. Yog tias rab koob nrawm nrawm mus rau sab xis thiab maj mam rov qab mus rau qhov ze infinity (∞ Ω), nws qhia tau tias lub capacitor zoo li qub thiab muaj peev xwm loj; Yog hais tias tus nqi rov qab yog tsawg dua infinity, nws qhia tau hais tias qhov hluav taws xob tam sim no ntawm lub capacitor yog siab, thiab tus pointer nyeem ntawv yog tus nqi xau ntawm lub capacitor kuaj (qhov to ntawm txhuas electrolytic capacitors yuav tsum tshaj 200k Ω ua ntej siv); Yog hais tias tus pointer tsis viav vias mus rau sab xis, nws qhia tau hais tias lub capacitor muaj cov kab hluav taws xob sab hauv lossis cov electrolyte tau qhuav thiab tsis muaj peev xwm; Yog hais tias tus pointer swings ho, mus txog 0 Ω, thiab tsis rov qab, nws qhia tau hais tias lub capacitor tau tawg lawm.
Cov iav twg yog siv rau kev ntsuas capacitance nrog multimeter
Qhov no yuav tsum tau xaiv qhov sib thooj raws li qhov kwv yees qhov loj me ntawm qhov ntsuas capacitance:
Qhov 000p ntau yog haum rau ntsuas qhov ntsuas qis dua 2000pF;
20n qib, tsim nyog rau kev ntsuas capacitance ntawm 2000pF thiab 20nF;
200n qib, haum rau ntsuas capacitance ntawm 20nF thiab 200nF;
ob μ Iav, haum rau kev ntsuas 200nF rau 2 μ Lub peev xwm ntawm F;
nees nkaum μ Gear, haum rau ntsuas 2 μ F txog 20 μ Lub peev xwm ntawm F.
Kev ceev faj rau kev siv multimeter los ntsuas capacitance
Ua ntej ntsuas, nws yog ib qho tsim nyog yuav tsum xub txiav lub hwj chim thiab tso tawm lub capacitor. Cov txheej txheem ntawm kev tso tawm yog nrhiav cov khoom siv hlau xws li lub hau ntswj, tuav qhov liab qab ntawm cov hlau ntawm lub rwb thaiv tsev kov thiab muab ob txhais taw ntawm qhov ntsuas capacitor rau nws. Lub capacitance yog ntsuas los ntawm kev siv digital multimeter, nrhiav lub capacitor nres, thiab tom qab ntawd ntsaws ob txhais taw ntawm lub capacitor rau hauv lub qhov (socket) ntsuas capacitance tom qab tso tawm. Tus nqi tiag tiag yog qhov capacitance ntawm sab capacitor thaum nyeem ntawv ntawm LCD npo stabilizes, Yog tias ntsuas qhov xau, qhov kev tiv thaiv ntau ntawm tus pointer hom multimeter tuaj yeem siv rau kev ntsuas. Thaum ntsuas, lub peev xwm me me tuaj yeem muab tso rau hauv RX1K lossis RX100. Thaum ob lub probes txuas nrog ob txhais taw ntawm lub capacitor thaum ntsuas cov zaub ntawm lub dial, tus pointer deflects clockwise. Tom qab ntawd, raws li lub capacitor tau them tag nrho thiab tsis muaj qhov ntws tam sim no, tus taw tes yuav rov ua dua thiab rov qab mus rau qhov kawg. Qhov loj ntawm lub kaum sab xis ntawm lub pointer, lub peev xwm ntau dua, Thaum lub sij hawm deflection txheej txheem, tus pointer yuav tsum viav vias ntawm qhov ceev ceev kom nws rov qab mus rau infinity, qhia tias tsis muaj qhov to ntawm lub capacitor. Yog hais tias lub koob dheev qeeb qeeb los yog tsis rov qab los ntawm ib qho chaw ntawm lub dial, nws qhia tau hais tias muaj cov dej ntws ntawm lub capacitor hauv ib ntu. Yog hais tias nws thaum kawg qhia infinity, nws qhia tau hais tias tsis muaj to. Txawm li cas los xij, qhov no tsuas yog txiav txim ua ntej xwb. Yuav kom nrhiav tau tus nqi raug, nws yog ib qho tsim nyog yuav tsum tau soj ntsuam cov yam ntxwv ntawm lub ntsuas hluav taws xob, lub ntsuas hluav taws xob xau, lossis oscilloscope, Qhov no yog qee yam uas tib neeg tsis tuaj yeem muaj. Kuj tseem muaj cov capacitors uas muaj qhov ntsuas qhov ntsuas hluav taws xob. Qhov ntsuas hluav taws xob tiv taus ntawm electrolytic capacitors feem ntau yog sau rau ntawm lawv, thiab qee qhov ceramic capacitors tsis tau cim rau ntawm lawv. Ceev faj thaum xaiv lawv.
