Ob txoj kev rau Diode ntsuas nrog Multimeters
Kuv ntseeg tias ntau tus neeg paub txog diodes, uas tuaj yeem kuaj pom siv cov diode ntau ntawm ib qho multimeter. Multimeters muab faib ua pointer type thiab digital type multimeters. Lawv yuav tsum ua haujlwm tshwj xeeb li cas? Hauv tsab xov xwm no, tus editor yuav piav qhia meej:
1. Siv lub pointer hom multimeter los ntes diodes
Thaum siv lub pointer hom multimeter los ntsuas qhov kev tiv thaiv pem hauv ntej ntawm lub diode, qhov kev sojntsuam dub yuav tsum tau txuas nrog lub davhlau ya nyob twg zoo ntawm lub diode, thiab qhov kev sojntsuam liab yuav tsum txuas nrog lub davhlau ya nyob twg tsis zoo ntawm lub diode. Tom qab swapping lub probes, qhov rov qab tsis kam ntawm diode tuaj yeem ntsuas. Kev tiv thaiv ntau yam ntawm kev ua haujlwm rau pem hauv ntej ntawm cov diodes zoo tib yam feem ntau yog 3-8K Ω, thiab qhov kev tawm tsam ntawm qhov rov qab yuav tsum yog qhov kawg.
Kev tshawb pom ntawm txoj kev: Muab lub multimeter nyob rau hauv "Rx1k" txoj hauj lwm, txuas cov dub sojntsuam mus rau qhov zoo davhlau ya nyob twg diode RM11 thiab lub liab sojntsuam rau nws tsis zoo davhlau ya nyob twg. Kev ntsuas rau pem hauv ntej kuj yog hais txog 7.2k Ω, raws li qhia hauv daim duab 1; Muab lub multimeter nyob rau hauv "Rx10k" txoj hauj lwm thiab sib pauv cov probes los ntsuas qhov kev tiv thaiv ntawm nws cov reverse resistor, uas yog infinite, raws li qhia nyob rau hauv daim duab 2. Yog hais tias lub resistor ntawm pem hauv ntej resistor yog siab dhau los yog infinite, nws qhia tau hais tias lub diode muaj ib tug siab ntawm kuj los yog qhib Circuit Court; Yog hais tias qhov kev tiv thaiv ntawm qhov rov qab resistor tsawg dhau los yog xoom, nws qhia tau hais tias lub diode yog to los yog tawg.
Nyob ntawm txoj kev tshuaj xyuas. Raws li pom nyob rau hauv daim duab, tso lub multimeter nyob rau hauv "Rxl" txoj hauj lwm thiab ntsuas lub pem hauv ntej kuj ntawm lub diode. Qhov kev tiv thaiv yuav tsum yog tshaj kaum ohms, thaum lub zog ntawm qhov rov qab resistor yuav tsum yog infinite. Yog hais tias qhov kev tiv thaiv ntawm pem hauv ntej resistor yog siab dhau lawm, nws qhia tau hais tias lub diode muaj ib tug siab ntawm kuj los yog ib tug qhib Circuit Court; Yog hais tias qhov kev tiv thaiv ntawm qhov rov qab resistor tsawg dhau los yog xoom, nws qhia tau hais tias lub diode tau tawg los yog tawg.
2. Siv digital multimeter los kuaj diodes
Thaum siv digital multimeter los ntsuas lub diode, lub diode iav yuav tsum tau siv ua ntej. Txuas lub xov tooj liab mus rau qhov zoo davhlau ya nyob twg ntawm lub diode thiab qhov kev sojntsuam dub rau qhov tsis zoo ntawm lub diode. Qhov ntsuas tus nqi yog nws cov xaim hluav taws xob rau pem hauv ntej; Tom qab swapping lub probes, qhov rov qab conduction voltage poob ntawm lub diode tuaj yeem ntsuas, uas feem ntau yog infinite. Muaj ob txoj hauv kev txhawm rau txhawm rau txheeb xyuas diodes siv lub tshuab digital multimeter: tawm kev kuaj xyuas hluav taws xob thiab ntawm kev ntsuas hluav taws xob. Txawm li cas los xij, tsis hais txog txoj kev tshawb nrhiav, lub multimeter yuav tsum tau muab tso rau hauv txoj haujlwm "diode".
Thaum kuaj pom cov diodes zoo tib yam sab nraum txoj kev, tso cov digital multimeter nyob rau hauv txoj hauj lwm "diode", txuas lub xov tooj liab mus rau qhov zoo ntawm lub diode, thiab txuas cov dub sojntsuam mus rau qhov tsis zoo ntawm lub diode. Nyob rau lub sijhawm no, qhov tso tawm qhov hluav taws xob poob ntawm qhov screen yog "0.5 ~ 0.7", raws li qhia hauv daim duab (a); Tom qab hloov cov probes, qhov conduction voltage poob nqi yog infinite (feem ntau cov multimeters tso saib "1", ob peb zaub "OL"), raws li qhia nyob rau hauv daim duab (b). Yog tias muaj qhov sib txawv tseem ceeb hauv qhov tseem ceeb thaum kuaj, nws qhia tau tias qhov ntsuas diode puas lawm.
