Melana ne-Voltage Tester

I-Wirecutter isekela abafundi.Uma uthenga ngesixhumanisi esikuwebhusayithi yethu, singathola ikhomishana esebenzisana nayo.Funda kabanzi
Isihloli se-voltage esingathinteki siyindlela esheshayo nelula yokuhlola ukusebenza kwentambo ngokuphephile ezintanjeni, ezisokhethi, kumaswishi, noma kumalambu amadala ayeke ukusebenza ngendlela engaqondakali.Leli ithuluzi eliwusizo wonke umuntu osebenza ngogesi ahamba nalo.Ngemva kokukhuluma nomuntu osebenza ngogesi ophezulu onolwazi lweminyaka engu-20 nokusebenzisa amamodeli aphambili ayisikhombisa izinyanga eziyisishiyagalombili zokuhlola, sithole ukuthi i-Klein NCVT-3 iyisinqumo esingcono kakhulu.
I-Klein ikwazi ukubona i-voltage evamile kanye ne-voltage ephansi, futhi ifakwe ithoshi eliwusizo-uma ukukhanya kuvaliwe, ungase udinge ithuluzi elihle.
I-Klein NCVT-3 iyimodeli ye-dual-voltage, ngakho irekhoda kokubili i-voltage evamile (izintambo zasendlini) kanye ne-voltage ephansi (efana nokunisela, insimbi yokuncencethwa emnyango, i-thermostat).Ngokungafani namanye amamodeli esiwahlolile, ingakwazi ukuhlukanisa ngokuzenzakalelayo umehluko phakathi kwakho kokubili.Lesi sici siphinda siyenze ihambisane namasokhethi angenasici manje adingwa ngokucaciswa kwe-elekthronikhi.Izilawuli ku-NCVT-3 zinembile futhi zibonisa ngokucacile.Uma ihlolwa kuphaneli ye-circuit breaker egcwele izintambo eziphilayo nezifile, izwela ngokwanele ukufunda izintambo ezifile ukusuka ebangeni elifushane ngaphandle kokubika amanga izintambo ezibukhoma ezivela eduze .Kodwa isici esiwusizo kakhulu empeleni i-flashlight yayo ekhanyayo ye-LED, engasetshenziswa ngokuzimela ngaphandle kwe-voltage tester.Kumathuluzi avame ukusetshenziswa ezindlini ezingaphansi ezimnyama noma lapho izibani zingasebenzi, lesi isici sesibili kodwa esiwusizo kakhulu, futhi i-Klein ukuphela kwemodeli esiyihlolile ngalesi sici.Ngokusho kwale nkampani, leli thuluzi likwazi nokuphatha amaconsi afinyelela ku-6.5 feet, okungekubi uma kubhekwa ukuthi liwumkhiqizo we-elekthronikhi osezingeni eliphezulu.
Lesi sihloli se-voltage esimbaxambili siyefana nokukhetha kwethu ezicini ezibaluleke kakhulu, kodwa eminye imininingwane yaso emincane iyacasula kakhulu.
Uma ungamtholi u-Klein, siphinde sithanda i-Milwaukee 2203-20 voltage detector ene-LED.Izindleko zayo zicishe zifane, futhi zifana nezindinganiso zokuhlola i-Klein kanye ne-voltage ephansi, kanye nokusebenziseka kalula.Kodwa ithoshi alikhanyi kangako futhi alikwazi ukusetshenziswa lodwa ngaphandle komhloli.Iphinde ikhiphe ibhiphu ephezulu kakhulu futhi ayikho inketho yokuthulisa.
I-Klein ikwazi ukubona i-voltage evamile kanye ne-voltage ephansi, futhi ifakwe ithoshi eliwusizo-uma ukukhanya kuvaliwe, ungase udinge ithuluzi elihle.
Lesi sihloli se-voltage esimbaxambili siyefana nokukhetha kwethu ezicini ezibaluleke kakhulu, kodwa eminye imininingwane yaso emincane iyacasula kakhulu.
Bengilokhu ngibhala futhi ngibuyekeza amathuluzi kusukela ngo-2007, futhi izindatshana zishicilelwe ku-Fine Homebuilding, This Old House, Popular Science, Popular Mechanics and Tools of the Trade.Ngaphinde ngasebenza njengombazi, induna kanye nomphathi wendawo iminyaka eyi-10, ngisebenza kumaphrojekthi okuhlala abantu abayizigidi zamadola.Ngo-2011, ngaphinde ngadiliza indlu yami yasepulazini eyayineminyaka eyikhulu ubudala, eyayidinga uhlelo olusha lukagesi.
Ukuze uthole ulwazi olwengeziwe mayelana nabahloli bamandla kagesi abangathinteki, ngikhulume nabantu abawasebenzisa nsuku zonke: U-Mark Tierney wase-Tierney Electrical, e-Hopkinton, Massachusetts.U-Tierney unesipiliyoni seminyaka engu-20 futhi ubenenkampani yakhe kusukela ngo-2010.
Isihloli se-voltage esingathinteki sidinga kuphela ukuba seduze ukuze sithole amandla entambo noma kusokhethi.1 Iwusayizi nokuma kwe-fat ebukhali.Ukutholwa kwenzeka kwithiphu ye-probe.Ezimweni eziningi, ithiphu ye-probe yakhelwe ukuthi iphushelwe endaweni yokuphuma.Njengoba ukushaqeka kukagesi kungajabulisi kakhulu futhi kuyingozi kakhulu uma kubi kakhulu, leli thuluzi liwusizo ngisho nasezintweni zikagesi ezilula kakhulu, njengokuxazulula inkinga i-thermostat noma ukufaka iswishi ye-dimmer.
Ngokusobala, iyithuluzi elihle labasebenza ngogesi be-DIY, kodwa ngisho nabantu abanokuthambekela kukagesi okuyiziro bangazuza ngokuba nawo.Ngivame ukuyisebenzisa njengesigaba sokuqala sokuxazulula inkinga ngaphambi kokubiza uchwepheshe kagesi.
Umhloli ongeyena othintana naye angasiza futhi enze imephu yesistimu yakho kagesi ekhona.Angikaze ngihlale kunoma iyiphi indlu eseduze nephaneli enelebula efanele.Uma unendlu endala noma ifulethi, iphaneli yakho kagesi kungenzeka ibhalwe ngokungeyikho.Ukuxazulula le nkinga kuyinqubo edla isikhathi, kodwa kungenzeka.Vala wonke ama-circuit breaker ngaphandle kweyodwa, bese uhlola umsebenzi owenziwa endlini.Uma usuyitholile, ilebula i-circuit breaker bese uqhubekela kokulandelayo.
Abahloli abaningi abangathintana nabo baqopha kuphela ama-voltage ajwayelekile.Ngemva kokufunda ngalesi sihloko, sinqume ukuthi isihloli se-voltage esinebanga elikabili sifaneleka kakhulu kumabhokisi amathuluzi asekhaya.Ngamandla kagesi ajwayelekile, isengasebenza ngokujwayelekile, futhi kukhona inzuzo eyengeziwe yokuthola i-voltage ephansi, ewusizo ezinsimbini zeminyango, ama-thermostat, amathuluzi athile e-AV, ukunisela nokunye ukukhanya kwezwe.Izintengo zamamodeli we-dual-voltage kanye ne-single-voltage ikakhulukazi aphakathi kwe-US$15 kanye ne-US$25, ngakho-ke amadivaysi anobubanzi obukabili anengqondo njengethuluzi lokuma okukodwa kwabangewona ochwepheshe;ukuba nekhono futhi ungalisebenzisi kubaluleke kakhulu kunokulidinga futhi ungabi nalo.kuhle.
Lapho sinquma ukuthi yimaphi amamodeli okufanele siwahlole, safunda imikhiqizo ye-Amazon, Home Depot, kanye ne-Lowes.Siphinde saqondisa abakhiqizi bamathuluzi amandla ahloniphekile.Kusukela lapho, sehlise uhlu lwaba yisikhombisa.
Senze ezinye izivivinyo ukuze sithole ukusebenza okuphelele nokuzwela komhloli ngamunye.Okokuqala, ngacisha i-circuit breaker ebhokisini likagesi futhi ngazama ukuthola ukuthi yiziphi izintambo ezingu-35 eziphuma kulo ezaziphukile.Ngemva kwalokho, ngathatha intambo efile ukuze ngibone ukuthi ngingakwazi yini ukusondeza ithuluzi eduze kwentambo ebukhoma futhi ngenze umhloli afunde ukuthi inegethivu.Ngaphezu kwalezi zivivinyo zesakhiwo, ngiphinde ngasebenzisa umhloli ukuxhuma amasokhethi futhi ngafaka amaswishi afiphele, ama-cooktop, amafeni osilingi kanye nama-chandelier.
I-Klein ikwazi ukubona i-voltage evamile kanye ne-voltage ephansi, futhi ifakwe ithoshi eliwusizo-uma ukukhanya kuvaliwe, ungase udinge ithuluzi elihle.
Ngemva kokucwaninga izihloko, ukukhuluma nabasebenza ngogesi, nokuchitha amahora uhlola amamodeli ayisikhombisa ahamba phambili, sincoma i-Klein NCVT-3.I-NCVT-3 inokukhanya okukhomba okunembile, inkinobho enhle yokuvula/yokucima kanye ne-LED engaphakathi esebenza njengethoshi elincane.Lesi isici esihle kakhulu, ngoba uma uhlola i-voltage yocingo, ukukhanya kungase kungasebenzi kahle.Iphinde ihambisane nesokhethi yokuvikela i-tamper-proof edingwa yikhodi yamanje.I-NCVT-3 inenkomba yempilo yebhethri nomzimba oqinile ovikela okokusebenza kwayo kwe-elekthronikhi ebucayi kusukela ethonsini elingafika kumafithi angu-6½.
Okubaluleke kakhulu, i-NCVT-3 kulula kakhulu ukuyisebenzisa.Kuyidivayisi enobubanzi obukabili, ngakho ingakwazi ukubona ama-voltage ajwayelekile (amasokhethi, izintambo ezivamile) kanye nama-voltage aphansi (insimbi yomnyango, i-thermostat, izintambo zokuchelela).Abahloli abaningi bathola ama-voltage ajwayelekile kuphela.Ngokungafani namanye amamodeli ebanga elikabili, ingashintsha ngokuzenzakalelayo phakathi kobubanzi ngaphandle kokusebenzisa ukudayela okuzwelayo okubucayi.Igrafu yebha ye-LED eseceleni kwethuluzi ikhombisa i-voltage obhekene nayo.Ukutholwa kwamandla kagesi aphansi kukhanyisa izibani ezimbili eziwolintshi ezansi, futhi i-voltage evamile ikhanyisa isibani esisodwa noma ngaphezulu kwamathathu abomvu phezulu.Izinkampani eziningi zithengisa imitshina ephezulu nephansi ehlukene, kodwa kwabangewona ochwepheshe, kunengqondo ukuyibeka ethuluzini elilodwa, ikakhulukazi uma kulula ukusebenza njengo-Klein.
Endaweni yami engaphansi, izintambo zibethelwe ophahleni ngaphezu kwezibani ze-fluorescent, ngakho-ke noma izibani zikhanya, kunzima ukuphatha izintambo.Kulezi zinhlobo ezimbili ezinamathoshi, i-NCVT-3 iyona kuphela engakwazi ukusebenza ngokuzimela ngaphandle komsebenzi wokuhlola, omuhle ngempela.
Ithoshi le-LED ligqamile le-NCVT-3.Endaweni yami engaphansi, izintambo zibethelwe ophahleni ngaphezu kwezibani ze-fluorescent, ngakho-ke noma izibani zikhanya, kunzima ukuphatha izintambo.Kulezi zinhlobo ezimbili ezinamathoshi, i-NCVT-3 iyona kuphela engakwazi ukusebenza ngokuzimela ngaphandle komsebenzi wokuhlola, omuhle ngempela.Uma isihloli senziwe sasebenza, kuzoba nochungechunge lwamabhiphu nezibani ezikhanyayo.Uma nje ufuna ukusebenzisa ithoshi, kuhle ukwazi ukuligwema.Ukukhetha kwethu okuphuma phambili, i-Milwaukee 2203-20 voltage detector ene-LED nayo inomsebenzi wethoshi, kodwa izokhanya kuphela uma isihloli sivuliwe, ngakho-ke, kufanele ulalele ukukhala, ayikho indlela ngisho uma usendlini ekhanyiswe kahle Cisha ithoshi uma usebenza edolobheni.I-NCVT-3 LED iphinde ikhanye kuneMilwaukee.
I-NCVT-3 futhi inomuzwa oqinile kakhulu.Ngokusho komkhiqizi, ingakwazi ukumelana nokwehla okungamamitha angu-6.5, ngakho-ke uma uhlangabezana nokuwa, lo modeli uzokunikeza ithuba lokusinda.Ngaphezu kwalokho, izihluthulelo zivaliwe, futhi isivalo sebhethri sivaliwe, ngakho-ke i-NCVT-3 ingakwazi ukumelana nemvula encane nomswakama.U-Klein unevidiyo mayelana naleli thuluzi, futhi kubukeka sengathi lingaphansi kompompi oconsayo.
Lapho sibuza umuntu osebenza ngogesi u-Mark Tierney ukuthi angancoma noma yimuphi umenzi kumninikhaya, wasitshela ukuthi “othembeke kakhulu u-Klein.”Uthanda namamodeli anama-LED.Uthe kubanikazi bezindlu, “bazothola izici ezimbili ezinhle ethuluzini elilodwa.”
Mayelana nempilo yebhethri, u-Klein uthe amabhethri amabili e-AAA azohlinzeka ngamahora angu-15 okusetshenziswa okuqhubekayo kwesihloli namahora angu-6 okusebenzisa ithoshi ngokuqhubekayo.Lokhu kwanele kubasebenzisi bezikhathi ezithile, njengoba sishilo, kuhle ukuba nesibonisi sebhethri ukuze wazi uma sehla.
Akuthina sodwa abathanda i-NCVT-3.UClint DeBoer, owabhala ku-ProToolReviews, uthe ithuluzi “Ngisho noma wenza umsebenzi kagesi ngezikhathi ezithile, ungacishe ukuthole kalula.”Uphethe ngokuthi: “Leli ithuluzi eliklanywe kahle elikwazi ukwenza okufanele likwenze.Kuhle kakhulu.Khetha eyodwa.Ngeke uzisole.”
I-NCVT-3 iphinde yathola izibuyekezo ezinhle ku-Amazon ne-Home Depot.Iningi lezindaba ezingezinhle ku-Amazon zivela kubantu abathanda leli thuluzi kodwa abaphoxekile ngokuthi alikwazi ukuxhunywa kusokhethi.Njengoba kushiwo ngenhla, lokhu akuyona inkinga ngoba isakwazi ukubona yamanje futhi ibonise kuphela njenge-voltage ephansi (futhi iyenze ihambisane nesokhethi yokuvimbela i-tamper-proof edingwa yikhodi).Ukuze uqinisekise ngempela i-voltage ejwayelekile esokhethi, kulula ukukhulula isembozo bese ubeka ichopho lethuluzi ohlangothini lwesokhethi lapho izintambo zikhona.
I-NCVT-3 ihlukile ngoba ayikwazi ukuxhunywa kusokhethi.Uma uthi nhlá, lokhu kubonakala kuyinkinga, njengoba iningi labanye abahloli abangathintwayo bangafunda amandla kusokhethi ngokuwafaka endaweni evulekile.Iqiniso liwukuthi ngenxa yokuthi ingakwazi ukufunda ama-voltage aphansi, i-NCVT-3 isengakwazi ukudweba okwamanje ngaphandle kwesokhethi, okubalulekile lapho usebenza namasokhethi angenasici manje adingwa amakhodi kagesi.Ukufaka ipulaki kwelinye lamasokhethi, ingcindezi elinganayo idinga ukusetshenziselwa izimbobo ezimbili zamaphini (lena indaba yokuphepha kwezingane).Ngalawa masokhethi, i-voltage tester yendabuko engathinteki ayisebenzi ngaso sonke isikhathi ngoba ingakwazi ukufunda ama-voltage ajwayelekile kuphela.Njengoba uBruce Kuhn, umqondisi womkhiqizo wokuthuthukiswa komkhiqizo, ukuhlolwa kanye nokukala e-Klein, asitshela, “Uma wenza umhloli onjalo ezwele ngokwanele ukuze abone amandla kagesi angaphandle 'kwesokhethi engaphazanyiswa, kusho ukuthi kugcwele abantu. ibhokisi likagesi.Intambo eshisayo.”2 Ngenxa yokuthi i-NCVT-3 iklanyelwe ukubona i-voltage evamile kanye ne-voltage ephansi, lapho ibekwe ekuvuleni isokhethi ephilayo yokuvimbela i-tamper-proof, izothatha i-voltage evamile, kodwa uma ikude, ibonakala sengathi i-Voltage ephansi, usaqinisekisa ukuthi isokhethi ibukhoma.
Kukhona izinkinobho zokulawula ohlangothini lwe-NCVT-3, u-Tierney asitshele ukuthi sizinake.Uxwayise ngokuthi amamodeli anamabhathini asemaceleni kulula ukuwavula uma efakwe ephaketheni, okungagcini nje ngokucasula, kodwa nokusheshisa ukusetshenziswa kwebhethri.Umehluko owodwa osuka ku-NCVT-3 ukuthi izinkinobho zishaywa phezulu;izinkinobho eziningi ezifana nalezi ziphuma ohlangothini lwethuluzi futhi zingavulwa kalula ngephutha.Ngasebenzisa i-NCVT-3 ephaketheni lami usuku, futhi ayizange ivuleke.
Lesi sihloli se-voltage esimbaxambili siyefana nokukhetha kwethu ezicini ezibaluleke kakhulu, kodwa eminye imininingwane yaso emincane iyacasula kakhulu.
Uma i-Klein ingatholakali, sincoma ukuthi i-Milwaukee 2203-20 voltage detector ene-LED.Inemisebenzi eminingi efana ne-Klein NCVT-3, kodwa ithoshi alikhanyi kangako futhi alikwazi ukusetshenziswa ngaphandle komhloli.Iphinde ikhiphe ibhiphu enomsindo ngendlela emangalisayo (ayikho inketho yokuthulisa).Lokhu kungase kube yinzuzo endaweni yomsebenzi enomsindo, kodwa ngemva kokuchitha imizuzu engu-45 ngihlola izintambo egumbini elingaphansi, ivolumu yayanele ukungenza ngihlanye kancane.
Noma kunjalo, i-Milwaukee ingakwazi ukubona i-voltage ephansi kanye ne-voltage evamile, futhi akukho ukushintsha kwezandla phakathi kwayo, ngakho kulula ukuyisebenzisa njenge-NCVT-3.
Ngo-2019, saqaphela ukuthi uKlein manje ungumnikazi we-NCVT-4IR.Kubukeka kufana nokukhetha kwethu, kodwa futhi kufaka phakathi umsebenzi we-infrared thermometer.Sikholelwa ukuthi lokhu akuzifanele izindleko ezikhuphukile zokusebenzisa ekhaya njalo.
Siphinde saqaphela amamodeli ezinkampani ezifana ne-Meterk, ToHayie, Taiss, ne-SOCLL.Lawa ngamathuluzi avamile avela ezinkampanini ezingaziwa kancane.Sizwa sengathi kuphephe kakhudlwana ukuncoma abahloli abavela kubakhiqizi bezinto zokuxilonga zikagesi eziqinisekisiwe.
Sihlole i-Klein NCVT-2, efana kakhulu ne-NCVT-3.Futhi iyimodeli yobubanzi obukabili ekwazi ukubona ngokuzenzakalelayo phakathi kobubanzi obubili, kodwa ayinayo i-LED;inkinobho yokuvula/ukuvala iyaziqhenya ngayo (ngakho-ke kungenzeka ivulwe ephaketheni);futhi icala alinawo lowo muzwa oqinile.
Siphinde sabona i-Greenlee GT-16 ne-Sperry VD6505 zisebenzisa ukudayela ukukhetha ukuzwela phakathi kwe-voltage ephansi kanye ne-voltage evamile.Ngesikhathi sokuhlola kwethu, sithole ukuthi uma kunezintambo eziningi endaweni, lawa mamodeli azothola amasignali avela kwezinye izintambo, okwenza kube nzima ngathi ukwazi lapho ukuzwela kwehliswe ngokwanele ukuze kutholakale izintambo esizifunayo kuphela.Kunzima ukwazi amaqhinga okudayela okuzwelayo, futhi ukhetha ukusebenzisana okulula kwe-Milwaukee ne-Kleins.
I-Greenlee TR-12A inomklamo wamaphini amabili aqondise amasokhethi angaphazanyiswa, kodwa ingakwazi ukufunda ama-voltage ajwayelekile esikhundleni sama-voltage aphansi, ngakho-ke sicabanga ukuthi i-NCVT-3 iwusizo kakhulu.
I-Klein NCVT-1 ithola i-voltage ejwayelekile kuphela.Ngibe nomnikazi wayo iminyaka eminingi futhi bengilokhu ngiyithola inembile futhi inokwethenjelwa, kodwa kunengqondo ukuthola imodeli engakwazi nokubona ama-voltage aphansi.
Sicele u-Klein ukuthi achaze ngokunembile umgomo wokusebenza komhloli we-voltage ongathinteki.Le nkampani isitshele ukuthi: “Ithuluzi elikwazi ukuzwa amandla kagesi elingaxhunywanga lisebenza ngokunxenxa inkambu kazibuthe eyenziwe eduze kwekhondatha enikwa amandla omunye umthombo wamanje (AC).Ngokuvamile, Uma iphezulu i-voltage esetshenziswa ku-conductor, aqina amandla enkambu ye-electromagnetic field ehambisanayo.Inzwa emshinini wokuhlola ongathinteki iphendula ngokwamandla enkambu yenkambu kazibuthe kagesi.Ngokusekelwe kulo mgomo, lapho isihloli se-voltage esingathinteki siseduze ne-conductor enikwe amandla Lapho sibekwa, amandla kazibuthe kagesi akhangisiwe enza idivayisi “yazi” ukuthi isendaweni ene-voltage ephansi noma inkambu yamandla kagesi aphezulu.”
Ngathatha i-Klein NCVT-1 ngazungeza ikhaya lami.Ithola kuphela ama-voltage ajwayelekile.Izinga lokuphumelela lokuthola amandla ezisokisini ezivimbela ukuphazamisa cishe lingama-75%.
UDoug Mahoney ungumbhali wezisebenzi eziphezulu kwaWirecutter, okhuluma ngokuthuthukiswa kwekhaya.Usebenze emkhakheni wezokwakha ezisezingeni eliphezulu iminyaka eyi-10 njengombazi, induna nomphathi.Uhlala endlini yasepulazini eneminyaka engu-250, futhi uchithe iminyaka emine ehlanza futhi akha kabusha umuzi wakhe wangaphambili.Abuye afuye imvu, afuye inkomo, futhi asenga njalo ekuseni.
Kulo nyaka sihlole amagundane amageyimu angu-33 ukuze sithole angu-5 afaneleka kakhulu amageyimu anezintambo noma angenantambo, okufaka phakathi izinketho ezinentengo ephansi.
Ngemva kwamahora angaphezu kuka-350 ocwaningo nokuhlolwa kwamathuluzi angaphezu kuka-250, sihlanganise ikhithi engcono kakhulu yekhaya lakho.
Isiphuzo esikhulu esingenabo utshwala sinambitheka njenge-cocktail yotshwala, futhi siyabungazwa ngokufanayo.Siphuze iziphuzo ezingezona ezidakayo ezingama-24 ukuze sithole okungcono kakhulu.

Ukuhlolwa kwe-voltage ukumelana kwenziwa ngomthombo wamandla kagesi aphezulu kanye ne-voltage namamitha amanje.Ithuluzi elilodwa elibizwa ngokuthi “isethi yokuhlola ingcindezi” noma “umhloli we-hipot” ngokuvamile lisetshenziswa ukwenza lolu hlolo.Isebenzisa ama-voltage adingekayo kudivayisi futhi iqaphe ukuvuza kwamandla.I-current ingakhuba inkomba yephutha.Umhloli unokuvikela kokulayisha ngokweqile.I-voltage yokuhlola ingase ibe eyamanje eqondile noma eshintshanayo kumafrikhwensi kagesi noma enye ifrikhwensi, njengefrikhwensi ye-resonant (30 kuya ku-300 Hz enqunywa umthwalo) noma i-VLF (0.01 Hz ukuya ku-0.1 Hz), uma kufaneleka.I-voltage ephezulu inikezwa ezingeni lokuhlola lomkhiqizo othile.Izinga lohlelo lokusebenza lingase futhi lilungiswe ukuze kulawuleke ukuvuza kwamanzi okubangelwa imithelela ye-capacitive engokwemvelo yento yokuhlola.Ubude besikhathi sokuhlolwa buncike ezidingweni zokuhlola zomnikazi wempahla kodwa ngokuvamile bufika kumaminithi angu-5.I-voltage esetshenzisiwe, izinga lokusetshenziswa kanye nobude besikhathi sokuhlolwa kuncike ezidingweni zokucaciswa kwemishini.Kusebenza izindinganiso ezihlukene zokuhlola kuzinto zikagesi ezithengwayo, izinto zikagesi zezempi, izintambo zikagesi ophezulu, i-switchgear nezinye izinto.[2]

Izilungiselelo zomkhawulo wohambo ezijwayelekile zokuvuza zamanje zemishini ye-hipot ziphakathi kuka-0.1 no-20 mA[3] futhi zisethwa umsebenzisi ngokuya ngezici zento yokuhlola kanye nezinga lokusetshenziswa kwamandla kagesi.Injongo iwukukhetha ukulungiselelwa kwamanje okungeke kwenze umhloli akhubeke ngokungeyikho ngesikhathi sokusetshenziswa kwe-voltage, ngesikhathi esifanayo, kukhethwa inani elinciphisa umonakalo ongaba khona kudivayisi lapho kuhlolwa khona uma kwenzeka kuphuma noma ukuwohloka ngokungazi.