Diode hom multimeter (phau ntawv thiab cov lus qhia siv)
Cov cuab yeej thiab cov lus qhia

Diode hom multimeter (phau ntawv thiab cov lus qhia siv)

19.02.2023 /

Lub diode yog ib qho khoom siv hluav taws xob uas tso cai rau tam sim no ntws los ntawm nws hauv ib qho kev taw qhia, tsis yog qhov sib txawv. Semiconductor diodes feem ntau muaj cov qauv tsim qauv, uas yog P-hom semiconductor thaiv txuas nrog N-hom semiconductor thaiv thiab txuas nrog ob lub terminals, uas yog ib qho anode thiab cathode.

Rectifier Circuit Court yog ib qho hluav taws xob hluav taws xob uas muaj cov khoom siv hluav taws xob uas hloov pauv tam sim no mus rau tam sim no ncaj qha. Rectifier circuits yog siv rau hauv cov khoom siv hluav taws xob DC lossis RF teeb liab ntes hauv cov khoom siv xov tooj cua. Lub rectifier Circuit Court feem ntau muaj cov semiconductor diodes los tswj cov tam sim no thiab mercury rectifier teeb lossis lwm yam khoom.

Feem ntau, txoj hauv kev zoo tshaj plaws los ntsuas lub diode yog siv "Diode Test" hom ntawm koj lub multimeter, vim tias hom no cuam tshuam ncaj qha rau cov yam ntxwv ntawm lub diode. Nyob rau hauv txoj kev no, lub diode yog pem hauv ntej biased. Ib txwm ua haujlwm diode yuav nqa tam sim no thaum mus rau pem hauv ntej thiab yuav tsum muaj qhov poob qis. Yog hais tias tus nqi hluav taws xob tso tawm yog nyob nruab nrab ntawm 0.6 thiab 0.7 (rau silicon diode), ces lub diode zoo thiab noj qab nyob zoo.

Diode ntsuas cov kauj ruam hauv "Test Diode" hom

  • Txiav txim siab qhov zoo thiab qhov tsis zoo ntawm cov diodes.
  • Khaws koj lub tshuab hluav taws xob digital (DMM) hauv hom ntsuas diode. Hauv hom no, multimeter muaj peev xwm xa tau kwv yees li 2 mA ntawm qhov kev xeem coj.(2)
  • Txuas qhov kev sim dub coj mus rau qhov tsis zoo davhlau ya nyob twg thiab qhov kev sim liab ua rau lub davhlau ya nyob twg zoo.
  • Saib xyuas cov ntawv nyeem ntawm multimeter zaub. Yog hais tias tus nqi hluav taws xob tso tawm nyob nruab nrab ntawm 0.6 thiab 0.7 (rau silicon diode), ces lub diode zoo thiab noj qab nyob zoo. Rau germanium diodes, tus nqi no txawv ntawm 0.25 txog 0.3.
  • Tam sim no sib pauv cov 'meter' terminals thiab txuas cov dub sojntsuam mus rau qhov zoo davhlau ya nyob twg thiab liab sojntsuam mus rau qhov tsis zoo davhlau ya nyob twg. Qhov no yog qhov rov qab bias lub xeev ntawm lub diode thaum tsis muaj tam sim no ntws los ntawm nws. Yog li ntawd, lub ntsuas yuav tsum nyeem OL lossis 1 (sib npaug rau qhib Circuit Court) yog tias lub diode zoo.

Yog hais tias lub 'meter' qhia qhov tseem ceeb uas tsis muaj feem xyuam rau ob qho tib si saum toj no, ces lub diode (1) yog faulty. Diode tsis xws luag tuaj yeem qhib lossis luv.

xaus

Hauv tsab xov xwm no, peb muaj cov lus qhia ntxaws ntxaws ntawm "Diode Test" hom rau ntsuas diodes. Peb cia siab tias qhov kev paub peb muab yuav pab koj kawm ntxiv txog cov cuab yeej hluav taws xob.

tswv yim pom zoo

(1) Diode cov ntaub ntawv - https://learn.sparkfun.com/tutorials/diodes/all

(2) Cov ntaub ntawv Multimeter - https://www.electrical4u.com/voltage-or-electric-potential-difference/

Ntxiv ib saib