Yuav ua li cas ntsuas inductance nrog digital multimeter, yuav ua li cas ntsuas inductance nrog multimeter
Cov ntsiab lus inductance yog ib lub kauj ua los ntawm enameled hlau qhov txhab ntawm ib daim ntawv hlau nplaum (los yog lub nplhaib sib nqus), thiab tom qab ntawd ib lub cuab yeej tsim tom qab kev kho mob ntim.
Nyob rau hauv kev saib xyuas ntawm phau computer motherboards, txoj kev "on-road test" feem ntau yog siv los txiav txim qhov zoo ntawm inductive Cheebtsam.
Kev kuaj xyuas txoj kev:
Kauj Ruam 1: Tshawb nrhiav cov iav xaiv
Txij li thaum DC impedance ntawm tooj liab hlau ntawm lub inductance kauj yog me me, nws yog ib qho yooj yim ze rau ib tug ncaj-dhau. Yog li ntawd, thaum siv lub tshuab digital multimeter txhawm rau txheeb xyuas cov khoom siv inductive, raws li cov yam ntxwv no, xaiv cov iav qis tshaj plaws ntawm kev tiv thaiv, thiab txiav txim siab seb nws puas zoo lossis phem los ntawm kev ntsuas nws txoj hauv kev rau / tawm.
Tig lub digital multimeter mus rau txoj hauj lwm cim nrog "n" cim, thiab xaiv qhov ntau txoj hauj lwm ntawm "diode nrog buzzer".
Cov kauj ruam thib ob: kev kuaj xyuas
Nyob rau hauv lub xeev "passive" tom qab lub mainboard ntawm lub computer phau ntawv yog powered tawm, siv ob lub xeem coj ntawm cov multimeter mus kov lub solder pob qij txha ntawm ob kawg ntawm lub inductance keeb. Thaum lub sijhawm ua haujlwm no, lub sijhawm rau kev sim ua kom kov cov pob qij txha ntawm ob qhov kawg ntawm cov khoom siv inductance yuav tsum tsis txhob luv luv, txwv tsis pub nws yooj yim ua rau kev txiav txim tsis raug.
Qhov thib peb kauj ruam: soj ntsuam qhov kev xeem kom txiav txim
Yog tias qhov kev nyeem ntawv tso tawm ntawm lub vijtsam LCD yog qhov ruaj khov "{{0}}" lossis ze rau "0", thiab lub buzzer tseem nrov thaum lub sijhawm kuaj, cov khoom inductance nyob rau hauv kev xeem yog zoo; Yog hais tias qhov kev nyeem ntawv tau tso tawm kom pom tias yog lub cim overflow "1" (uas yog, "∞"), nws qhia tau hais tias cov khoom inductance tau tawg lawm; yog tias tus lej tso tawm ntawm lub vijtsam LCD flickers thaum lub sijhawm kuaj; Yog tias muaj qhov tshwm sim ntawm kev vuam virtual lossis desoldering, nws yuav tsum tau kho thiab kuaj xyuas.
Peb qhov xwm txheej saum toj no feem ntau muaj nyob rau hauv kev saib xyuas thiab tshuaj xyuas, thiab muaj ob qhov xwm txheej tshwj xeeb uas yuav tsum tau piav qhia tshwj xeeb, xws li F:
Ua ntej, yog tias qhov kev nyeem ntawv ntawm lub ntsuas hluav taws xob loj dhau mus txog 10n lossis siab dua 10Ω, txawm tias lub buzzer tseem beeping, nws tsis tuaj yeem txiav txim siab tias cov khoom inductance nyob rau hauv kev xeem yog qhov zoo.
Vim tias qhov impedance ntawm tag nrho cov inductive Cheebtsam ntawm lub motherboard ntawm lub computer phau ntawv yuav tsis ncav cuag li 10Ω: lub tiaj tus lub zog cia inductors thiab transformers siv nyob rau hauv lub hwj chim Circuit Court nrog loj zog noj thiab loj tam sim no, tooj liab hlau ntawm winding kuj tuab, thiab lub impedance qis heev; me me nti inductors siv nyob rau hauv lub hwj chim circuits nrog tsawg zog noj thiab tsis tshua muaj tam sim no los yog teeb liab circuits, txawm hais tias cov tooj liab hlau ntawm winding yog heev nyias, tab sis tus naj npawb ntawm lem yog me me, qhov ntev yog luv, thiab impedance kuj heev. qis.
Yog li, qhov kuaj pom ntawm 10Ω lossis siab dua tsis yog tus nqi impedance ib txwm muaj ntawm cov khoom siv inductance. Tej zaum nws yuav yog qhov ntsuas inductor tau raug txiav tawm, thiab kev nyeem ntawv yog impedance tus nqi ntawm lwm cov khoom sib txuas; Tus nqi tiv thaiv tus nqi tsim los ntawm luv luv Circuit Court ntawm lawv.
Thib ob, yog tias thaum lub sijhawm kuaj pom, lub buzzer tsuas yog ua lub suab luv luv thaum qhov kev sim cov hlau lead kov cov pob qij txha ntawm ob sab ntawm inductor thiab tom qab ntawd nres sai. Qhov teeb meem no feem ntau tshwm sim nyob rau hauv ib lub hwj chim Circuit Court nrog ib tug loj tam sim no. Qhov zoo ntawm qhov tshwm sim no tsis tsuas yog txhais tau hais tias lub ntsiab lus inductance tau tawg, tab sis kuj qhia tau tias muaj qhov tshwm sim luv luv (grounding) tshwm sim hauv Circuit Court ntawm ib kawg ntawm inductance. ntawm.
Yog li ntawd, thaum kuaj cov khoom inductance, lub sijhawm rau kev sojntsuam kov cov pob qij txha ntawm ob qho kawg ntawm cov khoom inductance yuav tsum tsis txhob luv dhau.
