Tham txog qhov sib txawv ntawm digital multimeter thiab pointer multimeter
1. Txoj cai ntawm multimeter
Lub hauv paus ntsiab lus ua haujlwm ntawm digital multimeter yog: ntsuas ntsuas-analog-rau-digital conversion-digital zaub; Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm tus pointer multimeter yog: ntsuas ntsuas-meter coil-electromagnetic induction-meter rotation zaub;
2. Cov qauv ntawm multimeter
Cov qauv sab hauv ntawm lub pointer multimeter yog qhov yooj yim, yog li tus nqi qis dua, kev ua haujlwm tsawg dua, kev saib xyuas yooj yim, thiab lub peev xwm overcurrent thiab overvoltage muaj zog. Digital multimeter siv ntau yam oscillation, amplification, zaus division tiv thaiv thiab lwm yam circuits sab hauv, yog li nws muaj ntau lub zog. Piv txwv li, nws muaj peev xwm ntsuas tam sim no, voltage, capacitance, inductance, thiab ua lub teeb liab generator. Vim yog cov qauv sab hauv ntawm digital multimeters, kev sib xyaw ua ke feem ntau siv, yog li lub peev xwm dhau qhov tsis zoo (tab sis tam sim no qee qhov tuaj yeem hloov lub zog, kev tiv thaiv tsis siv neeg, thiab lwm yam, tab sis kev siv ntau dua), thiab feem ntau tsis yooj yim. kho tom qab kev puas tsuaj.
3. Multimeter zaub hom
Lub multimeter digital txais cov duab digital, thiab tus pointer multimeter txais cov ntsuas ntsuas ntsuas; cov multimeter digital yog intuitive, cov zaub yog qhov tseeb, thiab cov zaub digital yooj yim to taub. Kev nyeem ntawv ntawm ib qho analog multimeter yog qhov yooj yim dua li ntawm cov multimeter digital. Lub pointer multimeter ncaj qha tsav ob txhais tes ntawm analog tam sim no thiab voltage tom qab rectification, shunting, thiab voltage division, thiab ua rau cov lus qhia ntawm lub dial.
4. Multimeter nyeem tau
Tus pointer multimeter yog ib qho ntsuas nruab nrab, uas tuaj yeem pom ncaj qha thiab ruaj khov thaum muaj tam sim no lossis qhov hluav taws xob. Digital multimeter yog ib qho ntsuas ntsuas tam sim. Nws siv 0.3 vib nas this los coj tus qauv los qhia qhov ntsuas ntsuas, qee zaum cov txiaj ntsig ntawm txhua qhov piv txwv zoo sib xws, tsis zoo ib yam, uas tsis yooj yim li tus pointer multimeter nyeem cov txiaj ntsig.
5. Kev cuam tshuam ntawm kev tiv thaiv sab hauv ntawm multimeter
Cov qauv sib txawv ntawm pointer multimeters muaj qhov sib txawv sab hauv, thiab cov txiaj ntsig kev ntsuas kuj txawv; thaum cov multimeters digital muaj qhov loj hauv kev tiv thaiv, thiab tsis muaj qhov sib txawv ntawm cov qauv thiab cov cuab yeej siv thaum ntsuas qhov tseem ceeb.
6. Lub peev xwm ntawm multimeter tuaj yeem cuam tshuam nrog cov hlau nplaum
Feem ntau ntawm cov pointer multimeters yog cov cuab yeej siv tshuab, thiab lub peev xwm los tiv thaiv kev cuam tshuam feem ntau muaj zog dua li ntawm digital multimeter. Tab sis nyob rau hauv cov nqe lus ntawm kev poob siab kuj thiab poob tsis kam, analog multimeters nyob deb inferior rau digital multimeters. Txij li thaum lub digital multimeter yog ib qho khoom siv hluav taws xob, cov khoom siv hluav taws xob yuav muaj qhov ntsuas tsis raug nyob rau hauv cov ntaub ntawv ntawm kev cuam tshuam ntawm magnetic teb.
7. Los ntawm qhov kev xav ntawm kev ntsuas qhov tseeb
Lub sab hauv tsis kam ntawm cov multimeter yog siab thiab tsis muaj kev ntsuas qhov yuam kev, yog li qhov tseeb ntawm cov multimeter yog siab dua qhov pointer multimeter. Digital multimeters tuaj yeem ncav cuag qib lab; pointer multimeters tsis tuaj yeem ua tiav qhov siab precision.
8. Yooj yim siv
Txhua lub zog ntawm digital multimeter muaj qhov tsis siv neeg xoom hloov ua haujlwm. Thaum ntsuas qhov tsis kam ntawm tus pointer multimeter, nws yuav tsum tau ua manually txhua lub sijhawm (luv qhov zoo thiab qhov tsis zoo, xoom hloov). Thaum lub digital multimeter ntsuas qhov tsis kam, tom qab tso qhov kev sim ua raws li qhov xav tau, nws tsuas yog yuav tsum tau kho cov iav.
9. Hais txog kev ntsuas
Digital multimeters tuaj yeem siv los ntsuas AC tam sim no, thaum pointer multimeters tsis muaj peev xwm. Cov multimeter digital muaj cov ntaub ntawv buzzer, uas tuaj yeem siv lub suab kom sai rau kev sib txuas ntawm kab; tus pointer multimeter yuav tsum tau xyuas cov koob qhia. Yog tias koj siv lub multimeter, koj yuav tsum xyuas qhov taw qhia taw qhia.
10. Los ntawm kev nyab xeeb nam ntawm multimeter nws tus kheej
Digital multimeter muaj qhov raug siab, siab precision, me me yuam kev, thiab nyeem tau yooj yim. Nws yog qhov zoo heev rau kev ua haujlwm tsis raug thiab txo kev puas tsuaj los ntawm kev ua yuam kev. Piv txwv li, siv cov ntaub ntawv tiv thaiv los ntsuas qhov voltage. Digital multimeter yuav tswb. Tus pointer multimeter yuav puas.
11. Lub tshuab hluav taws xob digital yuav tsum tau siv lub tshuab hluav taws xob (feem ntau yog 9 V stacked roj teeb)
Lub pointer multimeter tsis xav tau roj teeb lub zog thaum ntsuas qhov voltage thiab tam sim no. Lub roj teeb nyob rau hauv lub 'meter' yog siv raws li lub hwj chim mov (feem ntau 9V roj teeb thiab 1.5V roj teeb) thaum ntsuas passive Cheebtsam (xws li kuj, capacitance, transistor, thiab lwm yam).
