Dab tsi yog qhov ua haujlwm ntawm multimeter's diode buzzer?
Lub luag haujlwm ntawm multimeter's diode buzzer yog txhawm rau txheeb xyuas seb puas muaj kev sib txuas hauv Circuit Court thiab txhawm rau txheeb xyuas lub diode Hall tsis kam.
Ua ntej, xyuas seb cov kab ntawm tus maub los rau lub davhlau ya nyob twg txuas nrog. Piv txwv li, kuaj xyuas lub voj voog ntawm lub handlebar: qhib lub zog, ua kom lub zog tag nrho lub tsheb, tig lub qhov rooj fais fab, lub tsheb yuav tsis txav, thiab hloov lub handlebar yuav tsis ua haujlwm. Cov hlau kuaj liab txuas nrog rau tus tswj tuav lub xov hlau, thiab lwm ntu txuas nrog lub davhlau ya nyob twg los xyuas seb puas liab, dub, thiab xiav txuas nrog. Yog hais tias lub buzzer tsis suab, nws txhais tau hais tias txoj kab tawg.
Qhov thib ob, xyuas seb qhov kov thiab lub cev muaj zog puas puas lawm. Cov hlau kuaj liab txuas nrog cov kab teeb liab tsis zoo ntawm tus kov, thiab cov hlau kuaj dub txuas nrog lub teeb liab ntsuab ntawm tus kov. Kev nyeem ntawv ntawm 500 txog 600 qhia tias tus kov yog qhov qub. Lub cev muaj zog Hall yog xim liab thiab txuas nrog cov kab teeb liab tsis zoo, thiab cov hlau lead kuaj dub txuas nrog kab ntsuab, kab daj, thiab kab xiav nyob rau hauv ib ntus. Yog tias muaj tus nqi ruaj khov ntawm 500 txog 600, nws txhais tau hais tias Hall yog qhov qub. (Tus nqi ntawm 500-600 sawv cev rau qhov zoo voltage hloov ntawm 0.5-0.6)
Thib peb, xyuas qhov zoo ntawm cov tswj theem kab. Qhov liab yog txuas nrog lub ntsiab tsis zoo ntawm cov maub los, thiab cov xim dub yog txuas nrog cov kab daj, xiav thiab ntsuab peb theem nyob ntawm ib lub sijhawm. Yog tias qhov ntsuas qhov ntsuas zoo ib yam, nws txhais tau tias cov kab hluav taws xob theem yog qhov qub.
Plaub, xyuas qhov zoo ntawm LED teeb. Tus cwj mem dub txuas nrog tus ncej tsis zoo, tus cwj mem liab txuas nrog tus ncej zoo, thiab lub teeb nyob rau ib txwm.
Dab tsi yog tsab ntawv n ntawm lub peev xwm ntsuas ntawm digital multimeter sawv rau?
Tsab ntawv n nyob rau hauv qhov muaj peev xwm ntawm lub tshuab hluav taws xob digital qhia tias qhov ntau yog nF (nF ntawm no yog pronounced nanofarad).
"20n" yog hais txog 20nF ntau yam, uas tuaj yeem ntsuas lub peev xwm qis dua 20nF. Thaum ntsuas capacitance nrog lub digital multimeter, ntxig cov hlau kuaj liab rau hauv multimeter's Cx jack thiab cov ntsuas dub rau hauv COM jack, thiab tom qab ntawd kho qhov hloov pauv mus rau qhov tsim nyog raws li qhov loj ntawm lub peev xwm raug ntsuas.
A multimeter has the basic functions of measuring resistance, voltage, and current, as well as extended functions such as measuring capacitance, inductance Hfe, etc. When using it, use a knob to adjust it to the appropriate gear according to the measurement results. Among them , the gear for measuring capacitance is called "capacitance gear". In fact, N is a unit, n means nf, 1nF=10>-9F, hauv cov ntsiab lus yooj yim, n txhais tau tias "nano".
