Chitetezo cha mphezi ndi gawo lofunikira kwambiri pamabungwe omwe amagwiritsa ntchito zida zamagetsi zamagetsi, makamaka pamakampani owulutsa.Zogwirizana ndi mzere woyamba wachitetezo motsutsana ndi mphezi ndi kukwera kwamagetsi ndi njira yoyambira pansi.Pokhapokha atapangidwa ndi kuikidwa moyenera, chitetezo chilichonse cha opaleshoni sichingagwire ntchito.
Imodzi mwamasamba athu otumizira ma TV ili pamwamba pa phiri lalitali mamita 900 ndipo imadziwika kuti imakumana ndi mphezi.Posachedwapa ndapatsidwa ntchito yoyang'anira malo athu onse otumizira mauthenga;chotero, vuto linapatsidwira kwa ine.
Kugunda kwa mphezi mu 2015 kunapangitsa kuti magetsi azimitsidwa, ndipo jeneretayo sinasiye kuyenda kwa masiku awiri otsatizana.Nditayang'ana, ndidapeza kuti fuse yamagetsi yamagetsi yaphulika.Ndinazindikiranso kuti mawonekedwe a LCD omwe angoyikira kumene (ATS) alibe kanthu.Kamera yachitetezo yawonongeka, ndipo pulogalamu ya kanema yochokera ku ulalo wa microwave ilibe kanthu.
Kuti zinthu ziipireipire, mphamvu yogwiritsira ntchito itabwezeretsedwa, ATS inaphulika.Kuti tiwuzenso mpweya, ndinakakamizika kusintha ATS pamanja.Chiyembekezo chatayika ndi choposa $5,000.
Chodabwitsa, LEA atatu-phase 480V oteteza opareshoni sawonetsa zizindikiro zogwira ntchito nkomwe.Izi zadzutsa chidwi changa chifukwa ziyenera kuteteza zida zonse zomwe zili patsamba lino kuzochitika zotere.Mwamwayi, transmitter ndi yabwino.
Palibe zolembedwa za kukhazikitsa dongosolo lapansi, kotero sindingathe kumvetsetsa dongosolo kapena ndodo yoyambira.Monga momwe tikuonera pa Chithunzi 1, nthaka yomwe ili pamalopo ndi yopyapyala kwambiri, ndipo malo ena onse pansi amapangidwa ndi thanthwe la Novaculite, ngati silika-based insulator.M'derali, ndodo zokhazikika sizingagwire ntchito, ndiyenera kudziwa ngati ayika ndodo yachitsulo komanso ngati ikadali mkati mwa moyo wake wothandiza.
Pali zinthu zambiri zokhuza kuyeza kukana pansi pa intaneti.Kuti ndipange miyeso iyi, ndinasankha mita ya kukana kwa Fluke 1625, monga momwe tawonetsera pa Chithunzi 2. Ndi chipangizo chogwiritsira ntchito zinthu zambiri zomwe zingagwiritse ntchito ndodo yapansi yokha kapena kugwirizanitsa ndodo ya pansi ku dongosolo la kuyeza kwapansi.Kuphatikiza pa izi, pali zolemba zogwiritsira ntchito, zomwe anthu angatsatire mosavuta kuti apeze zotsatira zolondola.Iyi ndi mita yokwera mtengo, kotero tidabwereka kuti tigwire ntchitoyo.
Opanga ma Broadcast amazolowera kuyeza kukana kwa otsutsa, ndipo kamodzi kokha, tidzapeza mtengo weniweni.Kukaniza pansi ndi kosiyana.Chimene tikuyang'ana ndikutsutsa komwe malo ozungulira adzapereka pamene kukwera kwatsopano kukudutsa.
Ndinagwiritsa ntchito njira ya "kutsika kothekera" poyesa kukana, chiphunzitsocho chikufotokozedwa mu Chithunzi 1 ndi Chithunzi 2. 3 mpaka 5.
Chithunzi 3, pali ndodo yapansi E ya kuya kwake ndi mulu wa C ndi mtunda wina kuchokera pansi pa ndodo E. Mphamvu yamagetsi VS imagwirizanitsidwa pakati pa ziwirizi, zomwe zidzapanga E panopa pakati pa mulu C ndi ndodo yapansi.Pogwiritsa ntchito voltmeter, titha kuyeza voteji VM pakati pa ziwirizi.Pamene tikuyandikira E, kutsika kwa VM kumakhala kochepa.VM ndi ziro pa nthaka ndodo E. Komano, pamene ife kuyeza voteji pafupi mulu C, VM amakhala mkulu.Pa equity C, VM ndi yofanana ndi gwero lamagetsi VS.Kutsatira lamulo la Ohm, titha kugwiritsa ntchito ma voliyumu a VM ndi C yapano yomwe imayambitsidwa ndi VS kuti tipeze kukana kwa dothi lozungulira.
Kungoganiza kuti pofuna kukambirana, mtunda pakati pa ndodo ya pansi E ndi mulu wa C ndi mamita 100, ndipo voteji imayesedwa mamita 10 aliwonse kuchokera pa ndodo ya pansi E mpaka mulu wa C. Ngati mukukonzekera zotsatira, njira yotsutsa iyenera kuwoneka ngati Chithunzi. 4.
Gawo la flattest ndi mtengo wa kukana pansi, womwe ndi mlingo wa chikoka cha nthaka ndodo.Kupyola pamenepo pali mbali ya dziko lapansi lalikulu, ndipo mafunde amphamvu sadzadutsanso.Poganizira kuti impedance ikukulirakulira panthawiyi, izi ndizomveka.
Ngati ndodo yapansi ndi 8 mapazi, mtunda wa mulu C nthawi zambiri umayikidwa ku 100 mapazi, ndipo gawo lathyathyathya la mphiralo liri pafupi mamita 62.Zambiri zaukadaulo sizingafotokozedwe apa, koma zitha kupezeka muzolemba zomwezo kuchokera ku Fluke Corp.
Kukonzekera pogwiritsa ntchito Fluke 1625 kukuwonetsedwa mu Chithunzi 5. Mamita a 1625 otsika pansi ali ndi jenereta yake yamagetsi, yomwe imatha kuwerenga mtengo wotsutsa mwachindunji kuchokera pa mita;palibe chifukwa chowerengera mtengo wa ohm.
Kuwerenga ndi gawo losavuta, ndipo gawo lovuta ndikuyendetsa ma voltage.Kuti mupeze kuwerenga kolondola, ndodo yapansi imachotsedwa ku dongosolo lokhazikika.Pazifukwa zotetezera, timaonetsetsa kuti palibe kuthekera kwa mphezi kapena kuwonongeka panthawi yomaliza, chifukwa dongosolo lonse likuyandama pansi panthawi yoyezera.
Chithunzi 6: Lyncole System XIT ndodo yapansi.Waya wodukidwa womwe wawonetsedwa siwolumikizira wamkulu wa dongosolo loyika pansi.Makamaka olumikizidwa mobisa.
Ndikuyang'ana pozungulira, ndinapeza ndodo ya pansi (Chithunzi 6), yomwe ilidi ndodo ya mankhwala opangidwa ndi Lyncole Systems.Ndodo ya nthaka imakhala ndi mainchesi 8, dzenje la 10-foot lodzazidwa ndi dongo lapadera losakaniza lotchedwa Lynconite.Pakatikati mwa dzenje ili ndi chubu chamkuwa chopanda kanthu chautali womwewo wokhala ndi mainchesi awiri.Lynconite wosakanizidwa amapereka kukana kochepa kwambiri kwa ndodo ya pansi.Munthu wina anandiuza kuti poika ndodo imeneyi, mabomba ankaphulitsa popanga mabowo.
Pamene milu yamagetsi ndi yamakono imayikidwa pansi, waya amalumikizidwa kuchokera ku mulu uliwonse kupita ku mita motsatizana, kumene mtengo wotsutsa umawerengedwa.
Ndili ndi mtengo wotsutsa wa 7 ohms, womwe ndi mtengo wabwino.National Electrical Code imafuna kuti electrode yapansi ikhale 25 ohms kapena kuchepera.Chifukwa cha kukhudzidwa kwa zida, makampani opanga ma telecommunications nthawi zambiri amafuna 5 ohms kapena kuchepera.Zomera zina zazikulu zamafakitale zimafunikira kukana kwapansi.
Monga chizoloŵezi, nthawi zonse ndimafuna uphungu ndi zidziwitso kuchokera kwa anthu omwe ali odziwa zambiri pa ntchito yamtunduwu.Ndinafunsa Fluke Technical Support za kusiyana kwa zowerengera zomwe ndawerenga.Iwo adanena kuti nthawi zina zikhomo sizingagwirizane bwino ndi nthaka (mwina chifukwa thanthwe ndi lolimba).
Kumbali ina, Lyncole Ground Systems, wopanga ndodo zapansi, adanena kuti zowerengera zambiri ndizochepa kwambiri.Amayembekezera kuwerengedwa kwapamwamba.Komabe, ndikawerenga nkhani zokhudzana ndi ndodo zapansi, kusiyana kumeneku kumachitika.Kafukufuku yemwe adayesa chaka chilichonse kwa zaka 10 adapeza kuti 13-40% ya zowerengera zawo zinali zosiyana ndi zowerengera zina.Anagwiritsanso ntchito ndodo zapansi zomwe tinkagwiritsa ntchito.Chifukwa chake, ndikofunikira kumaliza kuwerenga kangapo.
Ndinapempha katswiri wina wamagetsi kuti ayike chingwe cholimba chapansi kuchokera m’nyumbayo kukafika pansi kuti m’tsogolo mupewe kuba mkuwa.Anachitanso muyeso wina wotsutsa pansi.Komabe, kunagwa mvula masiku angapo asanatenge kuwerenga ndipo mtengo womwe adapeza unali wotsika kwambiri kuposa 7 ohms (ndinatenga kuwerengako kunali kouma kwambiri).Kuchokera pazotsatirazi, ndikukhulupirira kuti ndodo yapansi idakali bwino.
Chithunzi 7: Yang'anani kugwirizana kwakukulu kwa dongosolo lokhazikika.Ngakhale dongosolo lokhazikitsira pansi likulumikizidwa ndi ndodo yapansi, chotchinga chingagwiritsidwe ntchito kuyang'ana kukana kwa nthaka.
Ndinasuntha chopondereza cha 480V kupita kumalo pamzere pambuyo pa khomo lautumiki, pafupi ndi cholumikizira chachikulu.Poyamba inali pakona ya nyumbayo.Nthawi zonse pakakhala mphezi, malo atsopanowa amaika wopondereza wa opaleshoniyo poyamba.Chachiwiri, mtunda pakati pake ndi ndodo ya pansi uyenera kukhala waufupi momwe ungathere.M'makonzedwe am'mbuyomu, ATS idabwera patsogolo pa chilichonse ndipo nthawi zonse imatsogolera.Mawaya a magawo atatu omwe amalumikizidwa ndi surge suppressor ndi kugwirizana kwake pansi amapangidwa kukhala afupi kuti achepetse impedance.
Ndinabwereranso kuti ndikafufuze funso lachilendo, chifukwa chiyani wopondereza opaleshoni sanagwire ntchito pamene ATS inaphulika panthawi ya mphezi.Panthawiyi, ndidayang'ana mosamalitsa kulumikizana konse komanso kusalowerera ndale kwa mapanelo onse ophwanya madera, majenereta osungira, ndi ma transmitters.
Ndidapeza kuti kulumikizana kwapansi kwa gulu lalikulu la ophwanya dera kulibe!Apanso ndipamene opondereza opangira opaleshoni ndi ATS amakhazikika (choncho ichi ndichifukwa chake wopondereza wothamanga sagwira ntchito).
Zinatayika chifukwa wakuba wamkuwa adadula kulumikizana ndi gululo nthawi ina ATS isanakhazikitsidwe.Mainjiniya am'mbuyomu adakonza mawaya onse apansi, koma sanathe kubwezeretsa kulumikizana kwapansi ndi gulu lophwanyira dera.Waya wodulidwa siwosavuta kuwona chifukwa uli kumbuyo kwa gululo.Ndinakonza kulumikizana uku ndikupangitsa kukhala kotetezeka kwambiri.
Magawo atatu atsopano a 480V ATS adayikidwa, ndipo ma cores atatu a Nautel ferrite toroidal adagwiritsidwa ntchito polowetsa magawo atatu a ATS kuti atetezedwe.Ndikuwonetsetsa kuti surge suppressor counter imagwiranso ntchito kuti tidziwe pakachitika opaleshoni.
Pamene nyengo yamkuntho inafika, zonse zinayenda bwino ndipo ATS inali kuyenda bwino.Komabe, fusesi ya transformer ikuwombabe, koma nthawi ino ATS ndi zida zina zonse zomwe zili mnyumbayi sizikukhudzidwanso ndi opaleshoniyi.
Tikupempha kampani yamagetsi kuti iyang'ane fuse yowombedwa.Ndinauzidwa kuti malowa ali kumapeto kwa njira yotumizira magawo atatu, choncho ndizovuta kwambiri kuti pakhale mavuto.Anatsuka mitengoyo ndikuyika zida zina zatsopano pamwamba pa ma transformer (ndikukhulupirira kuti ndi mtundu wina wa surge suppressor), zomwe zimalepheretsa fuseyi kuyaka.Sindikudziwa ngati adachita zinthu zina pamzere wotumizira, koma ziribe kanthu zomwe akuchita, zimagwira ntchito.
Zonsezi zinachitika mu 2015, ndipo kuyambira pamenepo, sitinakumanepo ndi mavuto okhudzana ndi kukwera kwa magetsi kapena mabingu.
Kuthetsa mavuto a kukwera kwa magetsi nthawi zina sikophweka.Chisamaliro chiyenera kutengedwa ndikuwonetsetsa kuti mavuto onse akuganiziridwa mu wiring ndi kugwirizana.Chiphunzitso chakumbuyo kwa machitidwe oyika pansi ndi kuphulika kwa mphezi ndikofunika kuphunzira.Ndikofunikira kumvetsetsa bwino zovuta za malo amodzi, ma voltage gradient, ndi kuthekera kwapansi kukwera panthawi ya zolakwika kuti mupange zisankho zoyenera pakukhazikitsa.
John Marcon, CBTE CBRE, posachedwapa adagwira ntchito ngati Chief Engineer ku Victory Television Network (VTN) ku Little Rock, Arkansas.Ali ndi zaka 27 akugwira ntchito zoulutsira mawu pawailesi ndi wailesi yakanema ndi zida zina, komanso ndi mphunzitsi wakale waukadaulo wamagetsi.Ndi injiniya wovomerezeka wa SBE komanso wowulutsa pawailesi yakanema yemwe ali ndi digiri ya bachelor mu engineering yamagetsi ndi kulumikizana.
Kuti mumve zambiri za malipoti otere, komanso kuti mukhale ndi chidziwitso pazambiri zathu zonse zomwe zikutsogola pamsika, mawonekedwe ndi kusanthula, chonde lembani kalata yathu yamakalata Pano.
Ngakhale FCC ndiyomwe idayambitsa chisokonezo choyambirira, Media Bureau ikadali ndi chenjezo loti liperekedwe kwa yemwe ali ndi chilolezo
© 2021 Future Publishing Limited, Quay House, The Ambury, Bath BA1 1UA.maumwini onse ndi otetezedwa.Nambala yolembetsa yamakampani ku England ndi Wales 2008885.
Nthawi yotumiza: Jul-14-2021
