Kev ntsuas txoj kev thiab kev ceev faj rau kev tiv thaiv ntawm digital multimeter
Thaum ntsuas, lub hwj chim zoo them tus ntsuas ntsuas ntsuas Cx los ntawm tus qauv tsis kam R{{0}}. Thaum pib ntawm kev them nyiaj, vim Vc=0, nws qhia "000". Raws li Vc maj mam nce, tus nqi tso tawm kuj nce. Thaum Vc=2VR, lub ntsuas ntsuas vaj huam sib luag qhia cov cim hla "1" thaum pib. Lub sij hawm them nqi t yog lub sij hawm xav tau rau cov nqi zaub hloov ntawm "000" kom dhau, thiab qhov kev ncua deb ntawm lub sijhawm no tuaj yeem ntsuas tau siv lub ntsuas quartz. Siv DT830 Digital Multimeter rau kwv yees 0.1 μ Thaum ntsuas lub peev xwm ntawm cov capacitors xws li F mus rau ob peb txhiab microfaragons, qhov kev tiv thaiv ntau tuaj yeem raug xaiv raws li Table 5-1, uas muab qhov ntsuas qhov ntsuas tau thiab lub sijhawm them nqi sib xws.
Kev ntsuas txoj kev tiv thaiv ntawm digital multimeter
Thaum ntsuas qhov tsis kam, nws yuav tsum tau cim nrog "ω" Tus nqi tiag tiag ntawm qhov ntsuas qhov ntsuas yog sib npaug rau kev nyeem ntawv ntawm qhov ntsuas tau muab faib ua ntau yam qhia los ntawm lub pob qhov rooj. Ua ntej ntsuas, ob lub probes yuav tsum luv luv Circuit Court, thiab xoom potentiometer yuav tsum tig los ua tus pointer ntawm 0 ω Xaiv lub iav qhov tsim nyog los xyuas kom meej qhov ntsuas. Txhua zaus hloov pauv, nws yuav tsum rov pib dua rau xoom. Tsis tas li ntawd, qhov ntsuas ntawm kev tiv thaiv yuav tsum tau nqa tawm passively thiab tsis muaj lwm cov ceg sib txuas. Tom qab kev ntsuas qhov ntsuas (lossis tam sim no) tiav, qhov hloov pauv hloov yuav tsum tig mus rau qhov chaw siab voltage, uas yog tus cwj pwm zoo los tiv thaiv kev siv tsis raug ntawm ohmmeter (lossis txoj haujlwm tam sim no) los ntsuas qhov voltage.
Kev ceev faj rau kev tiv thaiv ntawm digital multimeter
Teem lub digital multimeter mus rau qhov tsim nyog tsis kam, nrog rau cov liab thiab dub sojntsuam qhov txawv ntawm ob tug ncej ntawm kev sim capacitor Cx. Lub sijhawm no, tus nqi tso tawm yuav maj mam nce los ntawm "000" kom txog thaum lub cim overflow "1" tshwm. Yog tsis tu ncua tso saib "000", nws qhia tau hais tias ib qho luv luv Circuit Court nyob rau hauv lub capacitor; Yog tias cov dej ntws tawm tsis tu ncua, nws tuaj yeem ua rau qhib qhov hluav taws xob nruab nrab ntawm cov ncej sab hauv ntawm lub capacitor, lossis nws tuaj yeem tiv thaiv qhov kev xaiv tsis zoo ntawm qhov tsim nyog. Thaum kuaj xyuas electrolytic capacitors, yuav tsum tau them nyiaj mloog mus rau kev sib txuas cov hlau lead liab (nrog rau qhov zoo) mus rau tus ncej zoo ntawm lub capacitor thiab cov hlau lead dub mus rau qhov tsis zoo ntawm lub capacitor.
