Cov khoom cuav UL tau ntawv pov thawj cov khoom siv hluav taws xob sawv cev rau qhov kev hem thawj loj heev hauv ntiaj teb kev lag luam cua sov, qhov uas cov neeg tsim khoom tsis raug cai cuam tshuam kev dag "UL tau lees paub" cov ntawv rau cov khoom lag luam tsis zoo los siv cov kev xav tau nruj ntawm North American kev lag luam. Cov fakes no tsis tsuas yog hla cov qauv kev nyab xeeb tseem ceeb tab sis kuj qhia txog kev pheej hmoo loj, suav nrog hluav taws kub, hluav taws xob poob siab, thiab kev ua haujlwm tawg. Rau cov neeg xa khoom thiab cov tuam txhab lag luam tsom mus rau Asmeskas thiab Canada, cov khoom cuav no tuaj yeem ua rau muaj kev tsis lees paub txog kev lis kev cai, kev nplua loj heev los ntawm cov koom haum tswj hwm xws li CPSC lossis OSHA, thiab muaj peev xwm foob los ntawm cov khoom lag luam lav. Kev paub txog cov txheej txheem pov thawj rau cov khoom siv hluav taws xob UL tau ntawv pov thawj tiag yog qhov tseem ceeb los txo cov kev phom sij no, ua kom muaj kev ua raws, kev nyab xeeb ntawm kev ua haujlwm, thiab ntev - lub sijhawm ua lag luam ncaj ncees nyob rau hauv siab - cov khoom lag luam xws li kev tsim khoom, aerospace, thiab cov khoom siv kho mob.
Lub hauv paus pob zeb ntawm kev lees paub pib nrog kev soj ntsuam zoo ntawm cov ntaub ntawv UL kos npe los yog luam tawm ntawm lub tshuab cua sov lub hnab. Cov cim no yuav tsum yog nkig, tsis paub meej, thiab muaj qhov tseeb "UL" tsim rau Asmeskas kev ua raws li US lossis "UL CSA" rau ob lub US-Canadian kev pom zoo raws li cov qauv zoo li UL 1041 thiab CSA C22.2 Tsis yog. 72. Ceev faj ntawm cov khoom cuav uas qhia kev hloov pauv, hloov pauv tsis raug - "UL-Ua raws"- lossis tag nrho cov cim. Nrog rau qhov no yuav tsum yog tus lej UL cov ntaub ntawv tshwj xeeb, feem ntau yog 6-8 tus lej alphanumeric code (xws li E123456), uas ua haujlwm raws li cov khoom lag luam tus cim. Kev tsis tuaj los yog qhov tsis sib xws hauv tus lej no yog ib qho qhia tseeb ntawm kev dag ntxias, raws li cov ntawv pov thawj tseeb ua rau qhov no rau kev taug qab.
Armed nrog cov ntaub ntawv tus naj npawb, mus rau UL Certification Directory ntawm ul.com/database (los yog qhov sib npaug CSA site rau Canadian tshwj xeeb). Nkag mus rau tus lej txhawm rau khaws cov ntaub ntawv ntxaws ntxaws: cov ntaub ntawv pov thawj lub npe, cov khoom siv meej xws li qhov ntsuas kub siab tshaj plaws (txog 800 degree), lub zog ntom ntom (piv txwv li, 15 W / cm²), qhov ntsuas hluav taws xob, thiab daim ntawv pov thawj tam sim no. Kev nkag raug cai yuav paub meej tias muaj xwm txheej ua haujlwm thiab phim lub tshuab cua sov qhov tshwj xeeb raws nraim; Qhov tsis sib xws, xws li cov ntaub ntawv tsis sib xws lossis cov npe tas sij hawm, qhia txog qhov cuav. Cov ntawv ceeb toom kev lag luam qhia tias ntau dua 40% ntawm qhov xav tias fakes ua tsis tau qhov kev kuaj online no, feem ntau vim tias cov neeg dag ntxias rov siv cov ntaub ntawv tsis raug lossis tsis cuam tshuam los ntawm cov khoom raug cai.
Ua kom tiav qhov no, txheeb xyuas cov ntaub ntawv nrog. Cov khoom siv hluav taws xob UL tau ntawv pov thawj tiag tiag yog bundled nrog Daim Ntawv Pov Thawj Ua Raws Cai (CoC), cov ntaub ntawv raug cai ntawm cov chaw tsim khoom lub npe sau npe, nthuav dav cov ntaub ntawv tus lej, batch- tshwj xeeb specs, hnub tsim khoom, thiab daim ntawv tso cai kos npe lossis digital foob. Cov khoom cuav feem ntau muab cov khoom siv tsis zoo lossis cov duab thaij duab CoCs nrog cov lus tsis meej, tshem tawm cov ntsiab lus, lossis tsis sib xws -zoo li tus lej cov ntaub ntawv uas tsis sib xws nrog cov khoom siv lub cev. Rau kev nruj ntxiv, thov cov ntaub ntawv taug qab lossis cov ntaub ntawv xeem los ntawm tus neeg muag khoom, uas yuav tsum tau piav qhia txog kev ua raws li UL cov txheej txheem nruj, suav nrog kev sim dielectric zog thiab thermal cycling endurance.
Kev tshuaj xyuas qhov ua tau zoo ntawm lub tshuab rhaub lub tshuab ua kom zoo muaj cov lus qhia ntxiv, raws li cov ntaub ntawv cuav ua qhov tseem ceeb tshaj tus nqi - txiav ntau dua. Cov chav muaj qhabnias khav theeb hwm nta: seamless, corrosion-resistant sheaths (xws li, 316 stainless hlau los yog Incoloy), siab -dielectric magnesium oxide rwb thaiv tsev rau xau- pov thawj kev ua tau zoo, tsis tu ncua wattage tis, thiab ruaj ntseg, strain-relieved txhuas kev sib txuas. Hauv qhov sib piv, cov khoom cuav tuaj yeem pom qhov sib txawv tsis sib xws, cov xov hlau tsis sib haum ua rau luv luv, subpar rwb thaiv tsev ua rau hotspots, lossis cov khoom siv hluav taws xob tsis zoo uas ua rau hnav. Ob txhais tes- ntawm cov tshev, xws li ntsuas qhov kev tiv thaiv nrog lub tshuab ntsuas ntau lossis ntsuas qhov pom ntawm qhov ua tiav, tuaj yeem qhia qhov tsis zoo no; Raws li cov kws tshaj lij kev pom, cov khoom siv hluav taws xob cuav yog qhov ua rau tsis ua haujlwm peb zaug siab dua hauv kev ntsuas kev ntxhov siab, uas ua rau cov nqi poob qis tshaj $ 10,000 rau ib qhov xwm txheej.
Thaum kawg, muab qhov tseem ceeb ntawm kev yuav khoom los ntawm cov chaw tsim khoom, vetted. Xaiv rau cov tuam txhab lag luam nrog UL daim ntawv pov thawj keeb kwm ncua tsawg kawg tsib xyoos, txheeb xyuas tau los ntawm UL database, thiab txhawb nqa los ntawm kev lag luam tawm tswv yim zoo ntawm cov platforms xws li ThomasNet lossis Alibaba tshuaj xyuas. Ua kom pom tseeb ntawm qhov tsis txaus ntseeg qhov kev txo nqi - nqi 20-30% hauv qab cov qauv kev lag luam feem ntau qhia cov ces kaum txiav ntawm daim ntawv pov thawj. Koom nrog rau kev mob siab rau los ntawm kev thov lub Hoobkas tshawb xyuas cov ntaub ntawv lossis mus saib cov chaw tsim khoom yog tias ua tau.
Hauv qhov tseem ceeb, kev lees paub UL daim ntawv pov thawj lub tshuab cua sov xav tau ntau- txoj hauv kev: kev lees paub UL cim thiab tus lej xov tooj hauv online, txheeb xyuas cov ntaub ntawv pov thawj, kuaj xyuas lub cev, thiab xaiv cov neeg xa khoom ntseeg siab. Qhov kev mob siab no tsis yog tsuas yog tiv thaiv cov khoom cuav xwb tab sis kuj txhawb nqa North American cov qauv kev cai, tiv thaiv kev phom sij thiab teeb meem nyiaj txiag. Rau kev yuav khoom ntau lossis cov ntawv thov tshwj xeeb (xws li, nyob rau hauv corrosive lossis siab - ib puag ncig kev co), enlisting ywj siab thib peb- cov chaw kuaj mob xws li Intertek lossis SGS rau kev kuaj ntxiv muab cov ntaub ntawv pov thawj ironclad, txhawb kev ntseeg siab hauv koj cov saw hlau thiab xaus - neeg siv kev nyab xeeb.
