Direct Test of AC Path Siv Multimeter Buzzer Range
Ib qho digital multimeter tsis tuaj yeem ntsuas ncaj qha circuits xws li capacitors, amplifiers, ua haujlwm amplifiers, thiab AC circuits. Tab sis yog tias ob qhov kawg ntawm lub piezoelectric ceramic nti ntawm cov digital multimeter yog soldered nrog ib tug ko taw, raws li qhia nyob rau hauv daim duab 2, kev cob cog rua nyob rau hauv series rau ib tug khub ntawm lub qhov (socket) A thiab B, thiab tsau rau lub roj teeb lub thawv npog nrog ob lub qhov raug, muaj ntau yam tshiab functions yuav muab ntxiv rau cov multimeter. Daim duab 2 Hloov kho daim duab ntawm digital multimeter buzzer
1. Ntsuas txoj kev sib txuas lus. DC tsis tuaj yeem dhau los ntawm AC channel, yog li nws tsis yooj yim rau kev ntsuas ncaj qha thiab txiav txim siab seb AC channel puas siv lub tshuab multimeter. Txawm li cas los xij, kev siv multimeter hloov kho rau kev ntsuas yog qhov yooj yim dua. Tsuas txuas A thiab B sojntsuam mus rau qhov pib thiab xaus ntawm AC channel. Yog hais tias lub buzzer suab, nws qhia tau hais tias lub AC yog unobstructed, txwv tsis pub nws qhia tau hais tias muaj ib tug Circuit Court break nyob rau hauv lub Circuit Court. Txhawm rau ntsuas kev siv cov txheej txheem saum toj no, qhov "+" thiab "-" sockets ntawm multimeter yuav tsum luv luv Circuit Court, thiab A thiab B sockets yuav tsum tau siv rau kev ntsuas. Yog tias koj xav ntsuas DC txoj hauv kev, koj tuaj yeem ntxig qhov luv luv rau hauv lub qhov A thiab B thiab ntsuas nws raws li txoj kev ntsuas dav dav multimeter.
2. Raws li lub tshuab hluav taws xob teeb liab, nws tuaj yeem siv los kuaj xyuas qhov tsis raug hauv ntau theem amplifier circuits. Cov txheej txheem yog raws li nram no: (1) Txuas lub Circuit Court nyob rau hauv kev sim rau lub hwj chim mov thiab muab tso rau hauv lub xeev ua hauj lwm; (2) Txuas ib qho kev sojntsuam A lossis kev sojntsuam B mus rau hauv av, thiab lwm qhov kev sojntsuam mus rau lub davhlau ya nyob twg ntawm lub sijhawm kawg ntawm lub voj voog amplification; (3) Ntsuas nrog oscilloscope lossis tus neeg hais lus saib seb puas muaj 1kHz tso zis teeb liab los ntawm theem kawg. Yog hais tias muaj ib tug amplified teeb liab tso zis, nws qhia tau hais tias qhov txhaum nyob rau hauv lub yav dhau los theem amplification Circuit Court. Txwv tsis pub, nws tuaj yeem txiav txim siab tias qhov txhaum yog nyob rau theem tam sim no.
7, Siv lub tshuab digital multimeter ua tus pas ntsuas kub
Ntau lub multimeters tsis muaj qhov ntsuas qhov ntsuas kub, thiab nws yog ib qho tsim nyog los sau cov ntsuas kub thaum txhua chav kawm. Kev tswj ntsuas kub yuav tsum tau ua thaum tsim khoom PCB, thiab siv cov ntsuas kub mercury tuaj yeem ua rau puas tsuaj. Tus sau tuaj yeem ntsuas qhov kub thiab txias los ntawm kev sib txuas ib qho yooj yim ntsuas ntsuas ntsuas hluav taws xob sab nraud. Kev ntsuas hluav taws xob suav nrog qhov ntsuas kub ntawm qhov hloov pauv hluav taws xob thiab qhov ntsuas qhov ntsuas qhov ntsuas siab. Qhov kub ntawm qhov hloov hluav taws xob hloov hluav taws xob muaj cov ntsuas kub sib xyaw ua ke, kev ua haujlwm ua haujlwm sib txuas, cov resistors, thiab lwm yam. Lub high-precision siv voltage qhov chaw muaj xws li ib tug integrated voltage regulator, capacitor, thiab resistor. Lub luag haujlwm yog los them rau qhov sib txawv ntawm 273.2K thiab 0℃thiab ua tiav qhov hloov pauv loj. Kho qhov voltage rhiab heev ntawm kev ntsuas Circuit Court rau 1mv / degree. Tom qab ntawd, muab qhov hloov pauv digital multimeter hloov mus rau hauv qhov hluav taws xob ntau ntawm 200mV thiab siv cov digital multimeter ncaj qha los tso saib qhov ntsuas qhov ntsuas kub.
