Effortlessly ntes cov neeg txom nyem teeb meem ntawm Potentiometers nrog ib tug Multimeter
Thaum siv multimeter los kuaj lub potentiometer, cov iav tsim nyog yuav tsum raug xaiv raws li tus nqi nominal ntawm potentiometer, thiab tus nqi nominal kuj ntawm potentiometer yuav tsum tau sim. Tus txheej txheem yog muab ib tug multimeter nyob rau hauv qhov tsim nyog Ω txoj hauj lwm, txuas lub ' meter ' mus rau lub "1" thiab "3" kawg ntawm lub potentiometer, thiab rab koob yuav tsum taw tes rau cov coj kuj ntsuas. Yog hais tias rab koob nyob twj ywm ntawm infinity thiab tsis viav vias, nws qhia tau hais tias lub cev tsis kam ntawm lub potentiometer kuaj tau tawg qhib Circuit Court. Yog tias qhov taw qhia taw qhia tsis ruaj khov, nws qhia tias potentiometer muaj kev sib cuag tsis zoo. Tom ntej no, ua raws li tus editor kom paub ntau ntxiv txog cov txheej txheem ua haujlwm kom ntxaws (raws li qhia hauv daim duab hauv qab no)
Xyuas seb lub caj npab txav tau ntawm lub potentiometer puas muaj kev sib cuag zoo nrog tus resistor. Thaum ntsuas tus nqi tsis kam nrog lub multimeter, tig lub potentiometer ncej thiab saib cov oscillation ntawm tus pointer. Thaum ntsuas, teeb lub multimeter rau hom kev tiv thaiv, txuas ib qho kev sojntsuam mus rau "2" kawg ntawm lub potentiometer lub caj npab txav, thiab txuas rau lwm qhov kev sojntsuam mus rau "1" lossis "3" kawg ntawm lub cev resistor. Ntsuas tus nqi tiv thaiv ntawm "1", "2" lossis "2", "3" kawg. Feem ntau, R12+R23=R13. Nyob rau tib lub sij hawm, tig lub potentiometer ncej counterclockwise, ces clockwise, thiab saib lub pointer ntawm lub multimeter. Ib lub potentiometer ib txwm thiab multimeter pointer yuav tsum txav rov qab mus zoo. Yog hais tias tus pointer txav tsis ruaj tsis khov los yog dhia, nws qhia tau hais tias muaj kev ua txhaum ntawm kev sib cuag tsis zoo ntawm caj npab potentiometer thiab tus resistor, raws li qhia hauv daim duab. Rau potentiometers nrog cov keyboards, nws tseem yuav tsum tau xyuas seb qhov hloov ntawm potentiometer puas nyob zoo. Siv hom kev tiv thaiv ntawm lub tshuab multimeter, txuas ob qhov kev sojntsuam mus rau qhov kev sib tiv tauj "4" thiab "5" raws li, tig lub potentiometer ncej los yog thawb thiab rub lub potentiometer ncej hloov mus rau "tig" thiab "tua" qhov hloov, thiab saib cov lus qhia multimeter pointer. Thaum qhov hloov pauv tau qhib, tus taw tes ntawm lub ntsuas yuav tsum taw tes rau sab xis (nrog xoom tsis kam); Thaum lub qhov hluav taws xob raug muab tua, tus pointer ntawm lub ntsuas yuav tsum taw tes rau sab laug sab laug (nrog rau qhov tsis muaj kev tiv thaiv). Nws tuaj yeem raug kuaj ntau zaus los soj ntsuam seb puas muaj qhov ua txhaum ntawm kev sib cuag tsis zoo hauv qhov hloov pauv, raws li qhia hauv daim duab.
Siv ib tug multimeter los ntsuas qhov tsis kam ntawm lub potentiometer yog 56.9K Ω, uas yog raws nraim qhov sib npaug ntawm qhov tsis kam ntawm 21.7K Ω qhia hauv daim duab thiab qhov tsis kam ntawm 35.2 Ω qhia. Cov ntsiab lus tseem ceeb yuav tsum nco ntsoov: Xaiv cov iav uas tsim nyog, txuas cov kev sojntsuam mus rau 1.3 kawg, ntsuas tus nqi nominal ntawm ob qho kawg, xyuas qhov kev sib cuag ntawm lub cev caj npab, ntsuas qhov kev tawm tsam thaum saib lub koob txav, thiab tom qab ntawd kuaj seb qhov hloov pauv puas zoo. Tig rau xoom thiab kaw tsis yog qhov zoo.
