Ammeters yog cov cuab yeej siv los txiav txim siab tus nqi tam sim no hauv Circuit Court. Cov kev hloov kho digital yog ua los ntawm kev sib piv. Lawv txawv ntawm qhov ntsuas qhov tseeb. Nws tseem yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias cov khoom siv tuaj yeem ntsia tau rau hauv ib lub voj voog uas muaj qhov ncaj thiab hloov tam sim no.
Raws li hom kev tsim kho, vaj huam sib luag, portable, thiab kev hloov kho hauv qhov txawv. Los ntawm kev teem caij, muaj cov khoom siv mem tes thiab theem-rhiab. Cov qauv xaiv tau muab faib rau hauv ib pawg. Txhawm rau delve rau hauv cov khoom siv kom ntxaws, nws yog ib qho tseem ceeb kom paub cov cuab yeej ntawm ammeter.
Ammeter Circuit Court
Ib yam digital ammeter Circuit Court suav nrog tus sib piv nrog rau cov resistors. Lub microcontroller yog siv los hloov qhov voltage. Feem ntau nws yog siv nrog siv diodes. Stabilizers tsuas yog ntsia tau rau hauv kev xaiv hloov kho. Broadband lim yog siv los ua kom qhov ntsuas qhov tseeb. Cov khoom siv theem yog nruab nrog transceivers.
DIY qauv
Sau cov digitalua-nws-koj tus kheej ammeter yog qhov nyuaj heev. Ua ntej ntawm tag nrho cov, qhov no yuav xav tau ib tug high-zoo sib piv. Lub rhiab heev parameter yuav tsum yog tsawg kawg yog 2.2 microns. Nws yuav tsum tuav qhov kev daws teeb meem tsawg kawg ntawm 1 mA. Lub microcontroller nyob rau hauv lub ntaus ntawv yog ntsia nrog siv diodes. Qhov ntsuas qhov system txuas nrog nws los ntawm lub lim. Tom ntej no, txhawm rau sib sau cov ammeter digital nrog koj tus kheej tes, koj yuav tsum tau nruab cov resistors.
Feem ntau lawv raug xaiv los ua hom hloov pauv. Lub shunt nyob rau hauv cov ntaub ntawv no yuav tsum tau nyob tom qab tus sib piv. Qhov kev faib ua feem ntawm cov cuab yeej nyob ntawm tus transceiver. Yog tias peb tham txog tus qauv yooj yim, ces nws yog siv los ua hom dynamic. Cov khoom siv niaj hnub no tau nruab nrog cov analogues meej meej. Lub roj teeb lithium-ion tsis tu ncua tuaj yeem ua haujlwm ruaj khov tam sim no.
DC Devices
Digital DC ammeter yog tsim los ntawm kev sib piv rhiab heev. Nws tseem ceeb heev uas yuav tsum nco ntsoov tias cov stabilizers tau nruab rau hauv cov khoom siv. Resistors tsuas yog haum rau hom hloov pauv. Lub microcontroller nyob rau hauv cov ntaub ntawv no yog ntsia nrog siv diodes. Yog tias peb tham txog qhov tsis muaj, ces qhov kev daws teeb meem tsawg kawg ntawm cov khoom siv yog 1 mA.
AC hloov kho
Ammeter (digital) AC tuaj yeem ua los ntawm koj tus kheej. Microcontrollers hauv cov qauv yog siv nrog rectifiers. Broadband hom lim yog siv los ua kom qhov ntsuas qhov tseeb. Lub shunt kuj nyob rau hauv cov ntaub ntawv no yuav tsum tsis txhob tsawg tshaj li 2 ohms. Qhov rhiab heev ntawm cov resistors yuav tsum yog 3 microns. Stabilizers yog feem ntau ntsia expansion hom. Nws tseem ceeb heev uas yuav tsum nco ntsoov tias koj yuav xav tau lub triode rau kev sib dhos. Nws yuav tsum tau soldered ncaj qha mus rau tus piv. Qhov kev tso cai yuam kev ntawm cov khoom siv ntawm hom no hloov pauv ntawm 0.2%.
Pulse ntsuas ntsuas
Pulse hloov kho yog qhov txawv ntawm qhov muaj cov txee. Cov qauv niaj hnub yog tsim los ntawm cov khoom siv peb tus lej. Cov resistors tsuas yog siv hom orthogonal. Raws li txoj cai, qhov kev faib ua feem rau lawv yog 0.8. Qhov kev tso cai yuam kev, nyob rau hauv lem, yog 0.2%. Qhov tsis zoo ntawm cov cuab yeej muaj xws li rhiab heev rau cov av noo ntawm ib puag ncig. Lawv kuj yuav tsum tsis txhob siv nyob rau hauv sub-zero kub. Nws yog teeb meem los sib sau ua ke qhov kev hloov kho ntawm koj tus kheej. Transceivers hauv cov qauv tsuas yog siv hom dynamic xwb.
Phase rhiab hloov khoom siv
Phase-rhiab qauv yog muag ntawm 10 thiab 12 V. Qhov kev kam rau siab rau cov qauv txawv ntawm 0.2%. Cov txee hauv cov khoom siv tsuas yog siv ob tus lej xwb. Microcontrollers yog siv nrog rectifiers. Ammeters ntawm hom no tsis ntshai ntawm cov av noo siab. Qee qhov kev hloov kho muaj amplifiers. Yog tias koj tab tom assembling lub cuab yeej, koj yuav xav tau hloov cov resistors. Lub roj teeb lithium-ion ib txwm tuaj yeem ua raws li qhov chaw ruaj khov tam sim no. Lub diode tsis xav tau hauv qhov no.
Ua ntej txhim kho lub microcontroller, nws yog ib qho tseem ceeb uas yuav tau muab cov lim lim. Ib lub converter rau lithium-ion yuav xav tau ib hom sib txawv. Nws tus qhab nia rhiab heevyog nyob rau theem ntawm 4.5 microns. Nrog ib tug ntse poob nyob rau hauv voltage nyob rau hauv lub Circuit Court, nws yog tsim nyog los xyuas cov resistors. Qhov kev faib ua feem hauv qhov no yog nyob ntawm qhov bandwidth ntawm tus sib piv. Qhov siab tshaj plaws ntawm cov khoom siv ntawm hom no tsis pub tshaj 45 kPa. Cov txheej txheem hloov dua siab tshiab tam sim no nws tus kheej yuav siv li 230 ms. Tus nqi moos nyob ntawm qhov zoo ntawm lub txee.
Scheme of selective devices
Lub DC xaiv cov ammeter yog ua raws cov kev sib piv siab bandwidth. Qhov tso cai yuam kev ntawm cov qauv yog 0.3%. Cov cuab yeej ua haujlwm ntawm lub hauv paus ntsiab lus ntawm kev koom ua ke ib-theem. Cov txee tsuas yog siv ob tus lej xwb. Cov chaw ruaj khov tam sim no raug teeb tsa tom qab tus sib piv.
Resistor yog siv ntawm hom hloov pauv. Rau kev sib dhos tus kheej ntawm tus qauv, yuav tsum muaj ob lub transceivers. Cov lim dej hauv qhov no tuaj yeem txhim kho qhov tseeb ntawm kev ntsuas. Qhov siab tshaj plaws ntawm cov cuab yeej nyob hauv thaj tsam ntawm 23 kPa. Kev poob qis hauv voltage yog qhov tsawg heev. Lub shunt kuj, raws li txoj cai, tsis pub tshaj 2 ohms. Qhov ntsuas tam sim no nyob ntawm qhov ua haujlwm ntawm tus sib piv.
Universal Measuring Instruments
ntsuas ntsuas thoob ntiaj teb yog tsim nyog rau kev siv hauv tsev. Cov kev sib piv hauv cov khoom siv feem ntau tsis tau teeb tsa rau siab rhiab heev. Yog li, qhov kev tso cai yuam kev nyob hauv thaj tsam ntawm 0.5%. Cov txee yog siv peb tus lej. Resistors yog siv los ntawm lub hauv paus ntawm capacitors. Triodes pom raws li theem,thiab hom mem tes.
Qhov kev daws teeb meem siab tshaj plaws ntawm cov khoom siv tsis pub dhau 12 mA. Lub shunt kuj feem ntau yog nyob ib ncig ntawm 3 ohms. Tso cai av noo rau cov khoom siv yog 7%. Lub limiting siab nyob rau hauv cov ntaub ntawv no yog nyob ntawm lub installation kev tiv thaiv.
Shield qauv
Kev hloov pauv ntaub thaiv npog yog tsim rau 10 thiab 15 V. Cov sib piv hauv cov khoom siv tau nruab nrog cov khoom siv hluav taws xob. Qhov kev tso cai yuam kev ntawm cov khoom siv yog tsawg kawg yog 0.4 5. Qhov siab tshaj plaws ntawm cov khoom siv yog li 10 kPa. Cov converters feem ntau yog siv los ntawm ntau yam sib txawv. Rau kev sib dhos ntawm tus kheej ntawm lub cuab yeej, koj tsis tuaj yeem ua yam tsis muaj ob tus lej suav. Cov resistors nyob rau hauv cov ntaub ntawv no yog ntsia nrog stabilizers.
Kev hloov pauv sib xyaw ua ke
Digital built-in ammeter yog tsim los ntawm kev siv cov khoom sib piv. Qhov kev hloov pauv ntawm cov qauv yog siab heev, thiab cov npoo ntawm qhov yuam kev yog li 0.2%. Qhov tsawg kawg nkaus daws teeb meem ntawm cov khoom siv tsis pub tshaj 2 mA. Stabilizers yog siv ob qho tib si expansion thiab impulse hom. Resistor yog teem rau siab rhiab heev. Microcontrollers feem ntau siv tsis muaj rectifiers. Qhov nruab nrab, cov txheej txheem hloov dua siab tshiab tam sim no tsis tshaj 140 ms.
DMK qauv
Digital ammeters thiab voltmeters ntawm lub tuam txhab no yog qhov xav tau zoo. Nyob rau hauv lub assortment ntawm lub tuam txhab no muaj ntau yam nyob ruaj ruaj qauv. Yog tias peb xav txog voltmeters, ces lawv tuaj yeem tiv taus qhov siab tshaj plaws ntawm 35 kPa. ATHauv qhov no, cov transistors yog hom toroidal.
Microcontrollers feem ntau yog nruab nrog cov converters. Rau kev tshawb fawb hauv chav kuaj, cov khoom siv ntawm hom no yog qhov zoo tagnrho. Lub tuam txhab digital ammeters thiab voltmeters yog tsim los nrog rugged tsev.
Torex device
Qhov ntsuas ntsuas ntsuas (digital) yog tsim nrog cov khoom siv tam sim no. Qhov siab tshaj plaws lub cuab yeej tuaj yeem tiv taus yog 80 kPa. Qhov tsawg kawg nkaus tso cai kub ntawm ammeter yog -10 degrees. Cov cuab yeej ntsuas ntsuas tsis ntshai ntawm qhov nce av noo. Nws raug nquahu kom nruab nws ze ntawm lub hwj chim. Qhov kev faib tawm tsuas yog 0.8. Lub ammeter (digital) withstands siab tshaj plaws ntawm 12 kPa. Kev siv tam sim no ntawm cov cuab yeej yog li 0.6 A. Lub triode yog hom theem. Qhov kev hloov kho no haum rau kev siv hauv tsev.
Lovat device
Qhov ntsuas ammeter (digital) yog tsim los ntawm tus lej ob tus lej. Tam sim no conductivity ntawm tus qauv tsuas yog 2.2 microns. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov qhov siab ntawm qhov sib piv. Cov zaub system yog qhov yooj yim, thiab nws yooj yim heev los siv lub cuab yeej. Cov resistors hauv ammeter no (digital) yog hloov hom.
Nws tseem ceeb heev uas yuav tsum nco ntsoov tias lawv muaj peev xwm tiv taus qhov hnyav. Lub shunt kuj nyob rau hauv cov ntaub ntawv no tsis ntau tshaj 3 ohms. Cov txheej txheem hloov dua siab tshiab tam sim no yog ceev heev. Kev poob qis hauv qhov hluav taws xob tsuas yog cuam tshuam nrog kev ua txhaum cai ntawm qhov kub thiab txias ntawm lub cuab yeej. Permissible humidity ntawm qhov teevammeter sib npaug li 70%. Nyob rau hauv lem, qhov siab tshaj plaws daws teeb meem yog 10 mA.
DigiTOP Model
No DC digital voltmeter / ammeter los nrog siv diodes. Lub txee rau hauv nws yog muab rau hom ob-tus lej. Lub conductivity ntawm tus sib piv yog nyob ib ncig ntawm 3.5 microns. Lub microcontroller yog siv nrog lub rectifier. Nws tam sim no rhiab heev heev. Lub hwj chim yog lub roj teeb tsis tu ncua.
Resistor yog siv rau hauv cov khoom siv hloov pauv. Lub stabilizer tsis tau muab rau hauv qhov no. Tsuas muaj ib tug triode xwb. Kev hloov pauv tam sim no ncaj qha tshwm sim sai heev. Rau kev siv hauv tsev, cov cuab yeej no tsim nyog. Cov lim tau muab los ua kom qhov ntsuas qhov tseeb.
Yog tias peb tham txog qhov tsis sib xws ntawm voltmeter-ammeter, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias qhov kev khiav hauj lwm voltage yog nyob rau theem ntawm 12 V. Kev noj tam sim no yog 0.5 A. Qhov kev daws teeb meem tsawg kawg nkaus ntawm qhov nthuav tawm. ntaus ntawv yog 1 mA. Lub shunt kuj yog ntawm 2 ohms.
Qhov sib faib ntawm voltmeter-ammeter tsuas yog 0.7. Qhov siab tshaj plaws daws teeb meem ntawm cov qauv no yog 15 mA. Cov txheej txheem hloov dua siab tshiab tam sim no nws tus kheej yuav siv tsis ntau tshaj 340 ms. Qhov kev tso cai yuam kev ntawm cov cuab yeej tshwj xeeb yog nyob ntawm qib ntawm 0.1%. Qhov siab tshaj plaws qhov system tuaj yeem tiv taus yog 12 kPa.
