Yuav ua li cas siv ib tug multimeter los ntsuas capacitance?
Lub multimeter yog paub rau txhua tus, tab sis ob peb tus neeg tuaj yeem siv nws kom huv si. Ntawm no, peb yuav piav qhia yuav ua li cas ib tug multimeter ntes capacitance? Tsis txhob underestimate qhov kev paub point, tej zaum koj tsis meej txog nws.
1 Pointer hom multimeter ntes capacitance
1.1 Txheeb xyuas cov Capacitors ruaj khov (1) Kev Tshawb Nrhiav Cov Capacitors ruaj khov nrog lub peev xwm ntawm 0.01 pF lossis siab dua. Teem lub pointer hom multimeter rau R × 10k ohm ntau thiab ua ohmic zeroing. Tom qab ntawd, siv cov kev sojntsuam liab thiab dub ntawm lub multimeter tiv tauj ob tus pins ntawm lub capacitor, thiab saib xyuas qhov kev hloov pauv ntawm tus pointer ntawm multimeter, raws li pom hauv daim duab 1. Yog tias lub sijhawm thaum lub sijhawm sojntsuam qhib, lub pointer. ntawm lub multimeter swings me ntsis mus rau sab xis thiab ces rov qab mus rau infinity. Tom qab hloov qhov kev sojntsuam thiab ntsuas dua, tus pointer kuj swings mus rau sab xis thiab rov qab mus rau qhov kawg, ces nws tuaj yeem txiav txim siab tias lub capacitor yog qhov qub; Yog hais tias tus pointer ntawm multimeter swings mus rau ze "0" nyob rau lub caij thaum lub sojntsuam qhib, nws muaj peev xwm txiav txim tau hais tias lub capacitor tau tawg los yog muaj heev to; Yog hais tias lub pointer swings thiab tsis rov qab mus rau infinity nyob rau lub sij hawm thaum lub sojntsuam qhib, nws yuav txiav txim tau hais tias lub capacitor yog to; Yog hais tias lub multimeter pointer tsis viav vias ob zaug, nws tuaj yeem txiav txim siab tias lub capacitor qhib Circuit Court.
(2) Thaum kuaj xyuas cov capacitors ruaj khov nrog lub peev xwm tsawg dua 0.01 pF thiab pom cov capacitors me me hauv qab 10 pF, ib lub tshuab multimeter yog siv los ntsuas vim nws lub peev xwm me me. Tsuas yog cov dej xau, sab hauv luv luv, lossis kev puas tsuaj tuaj yeem kuaj xyuas: Thaum ntsuas, siv R × 10k iav ntawm multimeter, txuas ob qhov kev sojntsuam mus rau ob tus pins ntawm lub capacitor, thiab tus nqi tiv thaiv yuav tsum yog infinite. Yog tias qhov ntsuas qhov ntsuas tsis zoo yog xoom, nws tuaj yeem txiav txim siab tias lub capacitor muaj kev puas tsuaj los yog kev puas tsuaj sab hauv.
