Qhov chaw twg kuv yuav tsum siv los ntsuas capacitance nrog multimeter?
Qhov no yuav tsum xaiv qhov sib thooj raws li qhov kwv yees qhov loj me ntawm qhov ntsuas tau ntsuas:
2000p iav, haum rau ntsuas capacitance tsawg dua 2000pF;
20n iav, haum rau ntsuas capacitance ntawm 2000pF thiab 20nF;
200n iav, haum rau ntsuas capacitance ntawm 20nF thiab 200nF;
2μ iav, haum rau ntsuas capacitance ntawm 200nF thiab 2μF;
20μF ntau, haum rau ntsuas qhov ntsuas ntawm 2μF thiab 20μF.
Yuav ua li cas ntsuas capacitance siv tus pointer multimeter
Xaiv Rx1k lossis Rx100 qib ntawm analog multimeter. Cov hlau kuaj dub txuas nrog rau tus ncej zoo ntawm lub capacitor, thiab cov hlau kuaj liab txuas nrog rau qhov tsis zoo ntawm lub capacitor. Yog tias rab koob txav nrawm mus rau sab xis ntawm lub sijhawm no, thiab tom qab ntawd maj mam rov qab los ze rau qhov kawg (∞Ω), nws txhais tau hais tias lub capacitor yog qhov qub. Thiab lub peev xwm loj; Yog hais tias nws tsis rov qab mus rau infinity, nws txhais tau hais tias cov xau tam sim no ntawm lub capacitor yog loj, thiab lub pointer qhia qhov to ntawm lub capacitor nyob rau hauv kev ntsuam xyuas (qhov to ntawm lub txhuas electrolytic capacitor yuav tsum tshaj 200kΩ ua ntej nws yuav siv tau) ; Yog hais tias tus pointer tsis viav vias mus rau sab xis, nws txhais tau hais tias lub capacitor tau tawg sab hauv los yog cov electrolyte tau qhuav thiab poob peev xwm; Yog hais tias tus pointer swings loj heev, ze rau 0Ω, thiab tsis rov qab, nws txhais tau hais tias lub capacitor tau tawg lawm.
Tej yam uas yuav tsum tau nco ntsoov thaum siv ib tug multimeter los ntsuas capacitance
Nco ntsoov txiav tawm lub zog thiab tso tawm ua ntej ntsuas. Cov txheej txheem ntawm kev tso tawm yog nrhiav cov khoom siv hlau xws li lub hau ntswj, tuav cov hlau uas raug rau ntawm tus kov insulating thiab muab tso rau ntawm ob txhais ceg ntawm lub capacitor hauv kev sim. Siv lub digital multimeter los ntsuas qhov capacitance. Nrhiav lub capacitor thaiv, tom qab ntawd ntsaws ob lub pins ntawm lub capacitor rau hauv lub qhov (socket) ntsuas capacitance tom qab lub capacitor tawm. Tos kom txog thaum qhov hloov pauv ntawm kev nyeem ntawv ntawm LCD npo stabilizes. Tus nqi tiag tiag yog lub peev xwm ntawm lub capacitor ntawm sab. Yog tias koj xav ntsuas qhov xau, koj tuaj yeem siv qhov tsis kam ntawm tus pointer multimeter. Thaum ntsuas, qhov me me capacitance multimeter tuaj yeem muab tso rau ntawm RX1K lossis RX100. Thaum ntsuas cov zaub ntawm lub dial, thaum ob qhov kev xeem coj mus txuas nrog ob tus pins ntawm lub capacitor, tus pointer yuav deflect clockwise, thiab tom qab ntawd raws li lub capacitor tau them tag nrho vim tsis muaj lub sijhawm tam sim no, tus pointer yuav txav mus rau counterclockwise. thiab rov qab mus rau infinity. 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. Qhov no pib qhia tias lub capacitor tsis muaj dej ntws. Yog tias muaj qee qhov taw qhia ntawm lub dial, Yog tias rab koob ntawm txhua txoj haujlwm dheev qeeb los yog tsis rov qab los, nws txhais tau hais tias lub capacitor tau xau hauv qee lub sijhawm. Yog hais tias qhov kawg zaub yog infinity, nws txhais tau tias tsis muaj to. Txawm li cas los xij, qhov no tsuas yog txiav txim luv luv xwb. Yog tias koj xav nrhiav tus nqi raug, koj yuav tsum siv lub ntsuas ntsuas lub ntsuas hluav taws xob thiab lub ntsuas hluav taws xob xau. Los yog cov yam ntxwv kev soj ntsuam ntawm oscilloscope, uas yog tsis yooj yim sua rau tib neeg muaj. Kuj tseem muaj lub capacitor nrog tus nqi hluav taws xob tiv taus. Tus nqi hluav taws xob tiv taus ntawm electrolytic capacitors feem ntau yog sau rau ntawm nws. Qee cov ceramic capacitors tsis muaj cim rau ntawm lawv, yog li ceev faj thaum xaiv lawv.
