Multimeter - Cov lus qhia rau kev ntsuas seb cov siv lead ua oscillator pib vibrate
Yuav ntsuas seb cov siv lead ua oscillator pib oscillate yam tsis muaj oscilloscope. Koj tuaj yeem siv multimeter los ntsuas seb qhov voltage ntawm ob tus pins ntawm cov siv lead ua oscillator yog ib nrab ntawm qhov ua haujlwm voltage ntawm lub nti. Piv txwv li, yog hais tias tus ua hauj lwm voltage yog 5V, nws yog hais txog 2.5V. Tsis tas li ntawd, yog tias koj kov lwm ceg ntawm cov siv lead ua nrog tweezers, qhov voltage hloov pauv loj, uas ua pov thawj tias nws tau pib oscillate.
Kev ceev faj rau kev siv digital multimeter
(1) Thaum ntsuas qhov tsis kam nrog ohm ntau ntawm ib lub multimeter, nco ntsoov tsis txhob ntsuas nrog lub hwj chim, thiab qhov ntsuas tsis tuaj yeem tsis muaj ceg sib npaug.
(2) Thaum ntsuas qhov tsis kam nrog tus nqi kuj loj heev (xws li 10M tsis kam), ob qhov kev sim yuav tsum tau luv luv ua ntej, thiab cov nqi tso tawm yuav yog 1M nyob rau lub sijhawm no. Tom qab txhua qhov ntsuas, koj yuav tsum rho tawm tus nqi no los ntawm qhov ntsuas qhov ntsuas kom tau txais qhov tseeb ntawm qhov tsis kam. (Thaum cov ntaub ntawv tiv thaiv siab, qhov yuam kev yuav loj heev).
(3) Kev sib txuas ntawm cov khoom siv hluav taws xob sab hauv thiab cov xim liab thiab xim dub coj los ntawm analog multimeter thiab digital multimeter:
(4) Thaum ntsuas qhov ntsuas hluav taws xob (lossis tam sim no) tsis tuaj yeem kwv yees ua ntej, nws yuav tsum tau hu mus rau qhov siab tshaj plaws rau kev sim, thiab tom qab ntawd xaiv qhov tsim nyog raws li qhov xwm txheej.
(5) Yog tias tus lej siab tshaj plaws ntawm multimeter qhia tus naj npawb "1" thaum lub sijhawm kuaj, thiab lwm tus lej tsis muaj, nws ua pov thawj tias lub ntsuas ntsuas tau dhau lawm, thiab ntau dua yuav tsum tau xaiv.
(6) Thaum ntsuas qhov tam sim no, thaum cov tswv yim tam sim no tshaj 2A, cov hlau kuaj liab yuav tsum txuas nrog lub "10A" jack. Kev txheeb xyuas thiab txheeb xyuas txoj hauv kev ntawm digital multimeter electronic Cheebtsam
Lub qhov feem ntau tsis nruab nrog cov cuab yeej tiv thaiv, yog li lub sijhawm ntsuas qhov siab tam sim no yuav tsum tsis pub tshaj 10 ~ 15s, kom tsis txhob hloov pauv tus nqi ntawm cov manganin shunt resistor tom qab cua sov, uas yuav cuam tshuam qhov tseeb ntawm qhov nyeem ntawv.
(7) Tsis txhob ua haujlwm tsis zoo hauv kev ua haujlwm, xws li siv cov iav tam sim no los ntsuas qhov hluav taws xob, tiv thaiv kev ntsuas hluav taws xob lossis tam sim no, thiab lub peev xwm los ntsuas cov khoom siv hluav taws xob, thiab lwm yam, kom tsis txhob ua rau lub ntsuas hluav taws xob puas.
Ua tib zoo zam thaum ntsuas qhov hluav taws xob loj (xws li 220V), txuas cov kev sim liab coj mus rau lub davhlau ya nyob twg tam sim no, uas yuav hlawv lub multimeter.
(8) Qhov taw qhia yuav dhia thaum qhov kev ntsuas tau pib ua ntej, thiab qhov ntsuas yuav tsum tau ua tom qab tus nqi tso tawm kom ruaj khov.
(9) Thaum ntsuas qhov tsis kam, diodes, thiab kuaj xyuas qhov txuas txuas ntxiv, cov hlau kuaj liab yuav tsum txuas nrog V•Ω jack. Lub sijhawm no, cov hlau lead kuaj liab yog qhov zoo, thiab cov hlau kuaj dub yog qhov tsis zoo thaum txuas nrog COM jack, uas yog qhov sib txawv ntawm cov hluav taws xob tsis kam ntawm cov ntsuas analog. . Thaum kuaj cov polarized Cheebtsam xws li diodes, transistors, lub teeb-emitting diodes (LEDs), thiab electrolytic capacitors, koj yuav tsum xyuam xim rau cov polarity ntawm cov kev xeem coj.
