Clamp Meter thiab Clamp Leakage Meter
1. Clamp Ammeter
Clamp-on ammeter, hu ua clamp-on ammeter, feem ntau yog siv los ntsuas ncaj qha (tsis muaj kev cuam tshuam cov xaim) tam sim no ntawm cov kab hluav taws xob tsawg. Nws yog qhov yooj yim heev rau siv thiab yog ib qho kev ntsuas tsim nyog rau kev kho lub cev muaj zog. Tam sim no, feem ntau muaj ob hom: hom pointer thiab hom digital.
Ua tib zoo mloog cov hauv qab no thaum siv lub clamp ammeter:
(1) Xaiv cov iav thiab ntau yam. Ua ntej ntsuas, lub iav thiab ntau yam yuav tsum tau xaiv ua ntej. Yog tias koj xav ntsuas qhov voltage, koj yuav tsum tig qhov hloov mus rau "V" thaiv; Yog tias koj xav ntsuas tam sim no, koj yuav tsum kwv yees tus nqi kwv yees ntawm qhov ntsuas tam sim no los xaiv qhov tsim nyog. Yog tias nws nyuaj rau kwv yees, koj yuav tsum siv ntau yam loj ua ntej, thiab tom qab ntawd maj mam hloov mus rau qhov tsim nyog me me. Meter yuav raug puas tsuaj thaum ntsuas qhov tam sim no loj nrog ntau yam me me.
(2) Kho qhov xoom txoj hauj lwm ntawm tus taw tes thiab ntsuas. Tom qab xaiv lub iav thiab ntau yam ntawm lub ntsuas ntsuas, koj yuav tsum saib seb tus pointer (pointer clamp meter) yog xoom lossis seb tus lej yog xoom (digital clamp meter). Yog tias qhov ntsuas tus nqi ntawm qhov ntsuas clamp tsis yog xoom thaum nws tsis ntsuas, nws yuav tsum tau hloov kho, txwv tsis pub nws yuav cuam tshuam qhov tseeb ntawm qhov ntsuas. Ua ntej kev ntsuas kev cai, nws yuav tsum tau sim ntawm ib lub xaim uas paub tus nqi tam sim no los xyuas nws qhov zoo.
(3) Ua tib zoo saib rau txoj kev ntsuas. Thaum ntsuas AC tam sim no, txoj hauj lwm ntawm qhov ntsuas tam sim no-nqa insulated hlau (yog tias nws yog cov hlau liab qab, nws yuav tsum tau muab qhwv thiab insulated ua ntej) yuav tsum nyob hauv nruab nrab ntawm lub puab tsaig kom tsis txhob ua yuam kev. Lub puab tsaig yuav tsum nruj nruj. Yog tias muaj suab nrov lossis lub pointer vibrates, nws feem ntau tshwm sim los ntawm cov khoom txawv teb chaws ntawm lub puab tsaig. Lub sijhawm no, cov khoom txawv teb chaws yuav tsum tau muab tshem tawm thiab kev ntsuas yuav tsum rov ua dua.
Thaum ntsuas tam sim no ntawm qhov hluav taws xob qis hluav taws xob, kev saib xyuas tshwj xeeb yuav tsum tau them rau kom muaj kev nyab xeeb ntawm nws lub taub hau thiab qhov chaw nyob. Tsis tas li ntawd, thaum lub clamp-on ammeter nyob ze dhau ntawm cov khoom siv hluav taws xob (xws li lub cev muaj zog), cov ntaub ntawv ntsuas feem ntau tsis raug; Thaum ntsuas qhov tam sim no tsawg dua 5 A, txhawm rau ua kom ntsuas qhov tseeb, cov xaim nqa tam sim no tuaj yeem raug mob ntawm lub puab tsaig rau ob peb zaug ntxiv thaum muaj xwm txheej tso cai. Hloov, ntsuas kev nyeem ntawv muab faib los ntawm tus lej ntawm cov xov hlau, yog tus nqi ntawm qhov tseeb tam sim no.
Thaum ntsuas qhov hluav taws xob, ntxiv rau kev hloov lub iav mus rau "V" txoj haujlwm, raws li qhov loj ntawm qhov ntsuas qhov ntsuas hluav taws xob, ua ntej ntxig qhov ntsuas coj mus rau hauv cov khoom sib txuas, thiab tom qab ntawd kov ob qhov kev ntsuas ua rau ntsuas qhov ntsuas tib yam. lub sij hawm, thiab tus dial nyeem Qhov ntawd yog, tus nqi voltage ntawm ob lub ntsiab lus yuav tsum tau ntsuas.
(4) Kev nyeem ntawv raug. Muaj ob lub nplai kab, liab thiab dub, ntawm lub dial ntawm lub ntsuas ntsuas. Cov kab liab nplai kab yog cov kab hluav taws xob ntsuas hluav taws xob, uas yog siv rau kev nyeem ntawv thaum ntsuas qhov hluav taws xob; cov kab dub yog kab kab tam sim no, uas yog siv rau kev nyeem ntawv thaum ntsuas tam sim no. Qhov tseeb ntsuas tus nqi yuav tsum yog cov khoom ntawm tus nqi qhia ntawm tus pointer thiab tus multiplier ntawm qhov hloov pauv. Piv txwv li, yog tias qhov ntsuas tus nqi ntawm tus taw tes yog 150 A (tus nqi ntsuas ntawm tus xov tooj yog 0-300 A), thiab yog tias qhov hloov pauv ntau nyob ntawm 30 A, 300 A, thiab 3 000 A, tus nqi tam sim no yog 15 A, 150 A, thiab 1 500 A raws. ib.
(5) Ua tib zoo saib xyuas kev nyab xeeb. Nws yog nruj me ntsis txwv tsis pub hloov qhov ntau yam iav thaum lub sij hawm ntsuas. Vim hais tias lub clamp core transformer yog tam sim no transformer nrog ntau qhov thib ob lem, nws yog sib npaug rau lub thib ob qhib Circuit Court thaum lub sij hawm hloov dua siab tshiab, uas yuav ua rau muaj hluav taws xob siab, uas yuav ua rau lub rwb thaiv tsev, ua rau cov cuab yeej puas thiab hluav taws xob poob siab. Tom qab kev ntsuas, loosen lub puab tsaig ntawm lub ntsuas ntsuas tam sim no, maj mam tshem tawm cov hlau, thiab ua tib zoo saib xyuas qhov hloov pauv mus rau qhov siab tshaj plaws tam sim no iav lossis qhov hluav taws xob iav qhov chaw, yog tias qhov tsim nyog ntau yam tsis raug xaiv vim tsis saib xyuas hauv siv tom ntej no. ua rau lub moos saib yuav khoov lossis ua rau lwm yam xwm txheej. Tsis tas li ntawd, nyob rau hauv huab cua thunderstorm, txhawm rau kom muaj kev nyab xeeb, nws yog txwv tsis pub ntsuas nrog clamp ammeter sab nraum zoov.
2. Clamp to tam sim no meter
Clamp to tam sim no meter yog ib hom tshiab ntawm AC tam sim no ntsuas ntsuas tau qhia hauv xyoo tas los. Nws cov tsos zoo ib yam li cov clamp tam sim no zoo tib yam, tab sis nws yog qhov ua tau zoo tam sim no transformer. Lub clamp to tam sim no ntsuas tau feem ntau tsis tsuas yog ntsuas qhov loj ntawm qhov hluav taws xob tsawg-voltage to tam sim no, tab sis kuj ntsuas qhov active tivthaiv thiab tus nqi ntawm cov rwb thaiv tsev tiv thaiv nyob rau hauv lub to tam sim no. Thaum ntsuas qhov xau tam sim no ntawm cov khoom siv hluav taws xob lossis cov xaim hauv kev ua haujlwm, cov xaim nyob thiab cov xaim nruab nrab (xa mus rau ib-theem AC cov khoom siv) lossis peb nyob ntawm cov xov hlau (xws li peb-theem AC cov khoom siv) yuav tsum tau muab khi ua ke hauv cov clamp to. Tam sim no 'meter', uas yog nws Qhov loj tshaj qhov sib txawv los ntawm qhov zoo tib yam clamp ammeters. Tam sim no, cov dej ntws tawm tam sim no ntawm lub ntsuas hluav taws xob tam sim no ua los ntawm Kyoritsu Instrument Company (KYORITSU) tuaj yeem ntsuas rau 4 mA, thiab qhov ua haujlwm tam sim no tuaj yeem ntsuas rau 1 000 A. Nws muaj cov haujlwm ntawm cov khoom siv tam sim no. meter thiab tuaj yeem xaiv tau.
