Thov txim, yuav ua li cas kuaj lub ignition kauj ntawm lub tsheb nrog multimeter?
1. Lub multimeter tsuas tuaj yeem ntsuas nws qhov on-off thiab kuj tus nqi rau kev siv. Txawm li cas los xij, feem ntau ignition coil faults yog tig-rau-tig luv luv Circuit Court (high voltage breakdown), uas tsis tuaj yeem ntsuas los ntawm multimeter, los yog lub input davhlau ya nyob twg (thawj) tuaj yeem txuas nrog roj teeb hluav taws xob tam sim ntawd, thiab cov khoom siv hluav taws xob yuav muaj. high voltage tso zis (secondary).
2. Lub multimeter tuaj yeem ntsuas qhov tsis kam ntawm ob lub high-voltage terminals, tab sis nws tsis tuaj yeem txiav txim qhov ua txhaum ntawm lub ignition coil.
3. Tus nqi hluav taws xob ntawm cov terminals ntawm ywj siab ignition coil plug nws txawv nrog txawv coils, yog li nws tsis tuaj yeem txiav txim siab qhov zoo ntawm ignition coil.
4. Txhua lub kauj muaj lub kauj thib ob thiab lub kauj tseem ceeb. Cov coils siv nyob rau hauv lub distributor yog tag nrho cov tso zis los ntawm ib tug high-voltage lub taub hau thiab ces faib rau txhua lub tog raj kheej.
Cov ntaub ntawv txuas ntxiv:
Cov qauv ntawm multimeter:
1. Lub taub hau:
Lub 'meter' taub hau ntawm lub multimeter yog rhiab heev galvanometer. Lub dial ntawm lub taub hau ' meter ' yog luam tawm nrog ntau yam cim, zuam cim thiab tus lej muaj nuj nqis.
Lub cim AV-Ω qhia tias qhov ntsuas no yog ib lub ntsuas ntsuas uas tuaj yeem ntsuas tam sim no, qhov hluav taws xob thiab tsis kam. Muaj ntau cov kab ntawv sau rau ntawm lub xov tooj, ntawm cov uas sab xis kawg cim nrog "Ω" yog cov kab hluav taws xob tsis sib haum, nws txoj cai kawg yog xoom thiab sab laug kawg yog ∞, thiab kev faib tawm ntawm qhov ntsuas qhov tseem ceeb tsis sib npaug.
Lub cim "-" lossis "DC" txhais tau tias DC, "~" lossis "AC" txhais tau tias AC, thiab "~" txhais tau hais tias cov kab ntau ntawm AC thiab DC. Ob peb kab ntawm tus lej nyob rau hauv kab kab yog qhov ntsuas qhov tseem ceeb sib xws rau cov zog sib txawv ntawm tus xaiv hloov.
Kuj tseem muaj lub tshuab xoom hloov kho pob qhov rooj ntawm lub ntsuas lub taub hau los kho qhov xoom txoj hauj lwm ntawm tus taw tes ntawm sab laug kawg.
2. Xaiv qhov hloov pauv:
Lub selector hloov ntawm multimeter yog ntau lub iav teb hloov. Siv los xaiv cov khoom ntsuas thiab thaj tsam. General multimeter ntsuas cov khoom suav nrog: "MA"; DC tam sim no, "V (-): DC voltage," V (~) ": AC voltage," Ω ": ua haujlwm.
3, stylus thiab stylus jack:
Cov cwj mem muab faib ua xim liab thiab dub. Thaum siv, lub stylus liab yuav tsum tau muab tso rau hauv lub jack cim nrog "ntxiv", thiab cov stylus dub yuav tsum muab tso rau hauv lub jack cim nrog "-".
4. Header (pointer):
Nws yog ib tug high-rhiab heev magnetoelectric DC ammeter, thiab lub ntsiab Performance indexes ntawm lub multimeter yeej nyob ntawm seb qhov kev ua tau zoo ntawm lub taub hau meter. Lub rhiab heev ntawm lub 'meter' yog hais txog DC tam sim no tus nqi ntws los ntawm lub 'meter' thaum tus pointer ntawm lub 'meter' deflects ntawm tag nrho cov nplai. Qhov me me no tus nqi, qhov siab dua ntawm lub 'meter'. Qhov ntau dua qhov kev tiv thaiv sab hauv thaum ntsuas qhov voltage, nws qhov kev ua tau zoo dua.
Muaj plaub lub cim kos rau ntawm lub taub hau 'meter', thiab lawv cov haujlwm yog raws li hauv qab no:
Thawj kab (los ntawm sab saum toj mus rau hauv qab) yog cim nrog R los yog Ω, uas qhia tus nqi kuj. Thaum qhov hloov pauv hloov nyob rau hauv ohm thaiv, qhov ntsuas kab no tau nyeem.
Qhov thib ob kab yog cim nrog ∽ thiab VA, qhia qhov tseem ceeb ntawm AC thiab DC voltage thiab DC tam sim no. Thaum qhov hloov pauv hloov pauv yog nyob rau hauv AC thiab DC voltage lossis DC tam sim no thaiv thiab qhov ntau yog nyob rau hauv lwm txoj haujlwm tshwj tsis yog AC 10V, qhov ntsuas kab no tau nyeem.
Qhov thib peb kab yog cim nrog 10V, qhia txog AC voltage tus nqi ntawm 10V. Thaum qhov hloov pauv hloov pauv yog nyob rau hauv AC thiab DC voltage ntau thiab qhov ntau yog 10V, qhov ntsuas kab no tau nyeem.
Qhov thib plaub yog sau npe dB, uas qhia txog qib suab.
5. Header (digital):
Lub 'meter' lub taub hau ntawm lub tshuab multimeter feem ntau yog tsim los ntawm A / D (analog / digital) hloov dua siab tshiab nti ntxiv rau cov khoom siv peripheral ntxiv rau cov kua siv lead ua kua, thiab qhov tseeb ntawm multimeter cuam tshuam los ntawm lub taub hau. Lub tshuab hluav taws xob digital hloov los ntawm A / D nti kuj feem ntau hu ua 3 1/2 digital multimeter, 4 1/2 digital multimeter thiab lwm yam.
Cov chips feem ntau siv yog ICL7106 (3-thiab-ib-ib nrab LCD phau ntawv ntau yam classic nti, cov ntawv tom ntej yog 7106A, 7106B, 7206,7240, thiab lwm yam), ICL7129(4-and-a -Ib nrab LCD phau ntawv ntau yam classic nti) thiab ICL7107 (3-thiab-ib nrab-ib nrab LED phau ntawv ntau yam classic nti).
6, ntsuas kab:
Kev ntsuas ntsuas hluav taws xob yog siv los hloov txhua yam kev ntsuas ntsuas rau hauv me me DC tam sim no haum rau ntsuas ntsuas. Nws muaj cov resistors, semiconductor Cheebtsam thiab roj teeb.
Nws tuaj yeem tig ntau yam kev ntsuas (xws li tam sim no, voltage, tsis kam, thiab lwm yam) thiab ntsuas qhov sib txawv rau hauv qee qhov me me DC tam sim no tom qab kev kho mob (xws li rectification, shunt, voltage division, thiab lwm yam) thiab xa nws. mus rau lub 'meter' rau kev ntsuas.
7. Hloov pauv:
Nws txoj haujlwm yog xaiv cov kab ntsuas sib txawv kom tau raws li qhov yuav tsum tau ntsuas ntawm ntau hom thiab ntau yam. Kev hloov pauv-tshaj feem ntau yog ib lub voj voog dial nrog cov haujlwm thiab ntau yam cim nyob ib puag ncig nws.
