Kev siv thiab kev khiav hauj lwm cov txheej txheem ntawm siab thiab tsis tshua muaj siab clamp gauges
1. Thaum siv high-voltage clamp meter, yuav tsum tau them nyiaj mloog mus rau theem voltage ntawm lub clamp ammeter. Nws yog txwv tsis pub siv lub ntsuas hluav taws xob tsawg-voltage los ntsuas qhov tam sim no ntawm high-voltage circuit. Thaum siv lub high-voltage clamp meter rau kev ntsuas, nws yuav tsum tau ua los ntawm ob tug neeg. Cov neeg ua haujlwm tsis ua haujlwm yuav tsum tau ua daim ntawv tso cai ua haujlwm thib ob. Thaum ntsuas, lawv yuav tsum hnav cov hnab looj tes insulated, sawv ntawm cov ntaub thaiv npog, thiab tsis txhob kov lwm yam khoom siv los tiv thaiv luv luv los yog hauv av.
2. Thaum soj ntsuam lub sijhawm ntawm lub moos, yuav tsum tau them nyiaj tshwj xeeb rau kev tswj kom muaj kev nyab xeeb ntawm lub taub hau thiab qhov them nyiaj. Qhov kev ncua deb ntawm ib feem ntawm tib neeg lub cev thiab qhov them nyiaj yuav tsum tsis txhob tsawg tshaj li qhov ntev ntawm lub clamp saib.
3. Thaum ntsuas ntawm high-voltage Circuit Court, nws yog txwv tsis pub txuas cov xov hlau los ntawm lub clamp ammeter mus rau lwm lub 'meter' rau kev ntsuas. Thaum ntsuas qhov tam sim no ntawm txhua theem ntawm high-voltage cables, qhov kev ncua deb ntawm cable taub hau yuav tsum yog tsawg kawg yog 300 hli, thiab cov rwb thaiv tsev yuav tsum zoo. Nws tsuas yog ua tau thaum nws pom tau tias yooj yim rau kev ntsuas.
4. Thaum ntsuas qhov tam sim no ntawm cov hluav taws xob tsis tshua muaj hluav taws xob fusible fuses lossis kab rov tav txheej txheem low-voltage busbars, txhua theem ntawm fusible fuse lossis busbar yuav tsum tau tiv thaiv thiab cais nrog cov ntaub ntawv rwb thaiv tsev ua ntej ntsuas kom tsis txhob ua rau theem luv luv Circuit Court.
5. Nws yog nruj me ntsis txwv tsis pub ntsuas thaum ib theem ntawm lub cable yog grounded. Txhawm rau tiv thaiv kev tawg hauv av thiab tawg los ntawm kev rwb thaiv tsev qis ntawm lub taub hau cable, uas yuav ua rau muaj kev phom sij rau tus kheej.
6. Tom qab kev ntsuas clamp ammeter tiav lawm, tig qhov hloov mus rau qhov siab tshaj plaws kom tsis txhob overcurrent thaum siv tom ntej; Thiab yuav tsum tau muab cia rau hauv tsev hauv qhov chaw qhuav.
Lub ntsuas hluav taws xob yog ib qho cuab yeej sib txuas ua ke tam sim no thiab ammeter, thiab yog ib ceg tseem ceeb ntawm cov thev naus laus zis digital. Nws txoj haujlwm ua haujlwm yog tib yam li ntsuas tam sim no. Lub clamp meter yog ib qho kev sib txuas ntawm lub tam sim no transformer thiab ammeter. Cov tub ntxhais hlau ntawm qhov tam sim no transformer tuaj yeem qhib thaum lub dab teg nruj; Cov hlau los ntawm kev ntsuas tam sim no tuaj yeem dhau los ntawm qhov qhib qhov sib txawv ntawm cov tub ntxhais hlau yam tsis tau txiav tawm, thiab cov tub ntxhais hlau kaw thaum lub qhov ciaj ntswj raug tso tawm. Cov kab hluav taws xob ntsuas hluav taws xob dhau los ntawm cov tub ntxhais hlau ua lub hauv paus kauj ntawm lub tam sim no transformer, thiab tam sim no yog induced nyob rau hauv lub thib ob kauj los ntawm tam sim no. Yog li hais tias lub ammeter txuas nrog lub coil thib ob muaj qhov taw qhia - ntsuas qhov tam sim no ntawm qhov ntsuas hluav taws xob.
Lub ntsuas hluav taws xob yog qhov tseem ceeb ntawm lub tshuab hluav taws xob tam sim no, lub tshuab hluav taws xob clamp, thiab lub tshuab hluav taws xob hluav taws xob hluav taws xob reactive quab yuam.
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm lub clamp hom meter yog tib yam li ntawm transformer. Thawj kauj yog ib lub xaim uas dhau los ntawm lub clamp hom hlau core, uas yog sib npaug rau thawj kauj ntawm 1-tig transformer. Qhov no yog ib tug step-up transformer. Secondary coil thiab ammeter siv rau kev ntsuas daim ntawv thib ob Circuit Court. Thaum muaj AC tam sim no dhau los ntawm cov xaim, nws yog qhov sib txawv ntawm cov hlau nplaum uas tsim los ntawm cov kauj no, uas ua rau cov hluav taws xob tam sim no nyob rau hauv lub voj voog thib ob. Qhov loj ntawm qhov tam sim no yog proportional rau qhov kev faib ua feem ntawm cov thawj tam sim no, uas yog sib npaug rau qhov sib piv ntawm tus naj npawb ntawm cov lem nyob rau hauv thawj thiab thib ob coils. Lub clamp hom ammeter yog siv los ntsuas cov dej ntws loj. Yog tias qhov tam sim no tsis loj txaus, tus naj npawb ntawm cov xaim hla ntawm lub clamp hom ammeter tuaj yeem nce ntxiv, thiab ntsuas tam sim no tuaj yeem muab faib los ntawm tus lej hloov.
Qhov thib ob winding ntawm cov tub ntxhais tam sim no transformer ntawm lub clamp ammeter yog qhov txhab nyob ib ncig ntawm cov tub ntxhais hlau thiab txuas nrog AC ammeter. Nws lub ntsiab winding yog ntsuas cov hlau hla los ntawm qhov chaw ntawm lub transformer. Lub pob qhov rooj yog qhov kev xaiv ntau yam, thiab kev ua haujlwm ntawm tus ciaj ntswj yog qhib thiab kaw qhov txav ntawm lub hauv paus ntawm cov tub ntxhais transformer, yog li txhawm rau txhawm rau txhawm rau ntsuas cov hlau tsis tuaj yeem pom qhov teeb meem sab hauv thiab tsis tuaj yeem rhuav tshem. ib tug loj tus naj npawb ntawm cov khoom xws li mechanical Cheebtsam. Los ntawm kev siv logic thiab cov kauj ruam tsim nyog, cov teeb meem tuaj yeem txheeb xyuas sai. Cov cuab yeej tseem ceeb hauv cov txheej txheem no yog multimeter.
Cov chav kawm ntawm cov teeb liab
Cov teeb liab kuaj feem ntau suav nrog voltage, tam sim no, thiab tsis kam. Tab sis feem ntau siv yog voltage. Cov teeb meem muaj xws li: Puas muaj hluav taws xob tam sim no? Tus nqi voltage yog dab tsi? Dab tsi yuav tsum yog tus nqi ib txwm? Dab tsi yog qhov voltage poob ntawm cov khoom siv lossis qhov txuas txuas? Piv txwv li, yog hais tias tus input voltage ntawm ib tug relay yog 12.8V thiab lub output davhlau ya nyob twg yog 9.2V, qhov voltage poob yog 3.6V. Thov nco ntsoov tias cov pob qij txha ntawm cov xov hlau yuav tsum raug suav hais tias yog cov khoom sib txuas thiab yuav ua kom muaj hluav taws xob poob. Yog li ntawd nws kuj yuav ua rau malfunctions.
Kev kuaj xyuas qhov tsis raug hauv tsheb siv analog / digital multimeters
Raws li cov txheej txheem sib txawv, cov teeb meem hluav taws xob hauv tsheb tuaj yeem muab faib ua ob peb pawg. Thov nco ntsoov tias qhov ua txhaum tiag tuaj yeem tshwm sim hauv ib lub kaw lus, thaum qhov kev sim tshwm sim tuaj yeem tshwm sim hauv lwm qhov system. Cov kab ke them los ntawm phau ntawv no feem ntau suav nrog: them nyiaj; Pib qhov system; Roj / cua system; Ignition system; Lub cev / cav tswj / txias system.
Cov neeg feem coob tsis nqa tsheb mus rau lub khw kho kom txog thaum nws pib tsis tau. Tus neeg tsav tsheb yog thawj zaug pom qhov ua haujlwm tsis zoo. Yog li qhov kev sib tw loj tshaj plaws yog los txiav txim siab seb qhov system twg ua rau tsis muaj peev xwm pib. Qee qhov kev ua txhaum yog tsim los ntawm kev sib txuas mus ntev, xws li rov ua hluav taws xob, teeb meem pib rau hnub kub, thiab lwm yam. Thaum lub kaw lus uas yuav ua rau muaj qhov tsis zoo, nws tuaj yeem kuaj tau siv Fluke multimeter.
