Daim ntawv pov thawj tshaj plaws hauv Tebchaws Meskas-UL daim ntawv pov thawj!

UL--lub npe tag nrho ntawm Underwrites Laboratories Inc. Nws yog cov ntawv pov thawj tshaj plaws hauv Tebchaws Meskas thiab lub koom haum ntiag tug loj tshaj plaws koom nrog kev ntsuas kev nyab xeeb thiab kev ntsuas hauv ntiaj teb. Nws yog ib lub koom haum ywj pheej, tsis muaj txiaj ntsig, kev tshaj lij uas ua cov kev sim rau pej xeem kev nyab xeeb. Nws siv cov kev sim kev tshawb fawb los kawm thiab txiav txim siab seb ntau yam khoom siv, cov khoom siv, cov khoom siv, cov khoom siv, lub tsev, thiab lwm yam puas tsim kev puas tsuaj rau lub neej thiab khoom thiab qib ntawm kev puas tsuaj; los txiav txim, sau thiab teeb tsa cov qauv sib xws thiab pab txo thiab tiv thaiv lub neej Cov ntaub ntawv ntawm cov khoom poob, thaum ua lag luam tshawb nrhiav qhov tseeb. UL daim ntawv pov thawj yog daim ntawv pov thawj uas tsis tas yuav tsum tau muaj nyob hauv Tebchaws Meskas, feem ntau yog rau kev kuaj xyuas kev nyab xeeb ntawm cov khoom thiab ntawv pov thawj, thiab nws cov ntawv pov thawj tsis suav nrog EMC (electromagnetic compatibility) yam ntxwv ntawm cov khoom.

Nyob rau hauv luv luv, nws yog tsuas yog koom nyob rau hauv cov khoom pov thawj kev nyab xeeb thiab kev khiav hauj lwm daim ntawv pov thawj kev nyab xeeb kev lag luam, thiab nws lub hom phiaj kawg yog kom tau cov khoom nrog ib tug ncaj ncees tus txheej txheem rau kev ua lag luam, thiab pab txhawb rau lub guarantee ntawm tus kheej noj qab haus huv thiab kev nyab xeeb khoom. Hais txog cov khoom pov thawj kev nyab xeeb raws li ib qho txiaj ntsig txhais tau tias tshem tawm cov kev cuam tshuam kev lag luam thoob ntiaj teb, UL kuj tseem ua lub luag haujlwm tseem ceeb hauv kev txhawb nqa kev lag luam thoob ntiaj teb.

UL tau tsim nyob rau hauv 1894 raws li cov khoom lag luam tsis muaj txiaj ntsig kev soj ntsuam kev nyab xeeb thiab ntawv pov thawj lub koom haum. Muaj ntau tshaj 50 lub chaw kuaj mob thoob ntiaj teb nrog kwv yees li 6000 tus neeg ua haujlwm. Ntau txhiab cov khoom dhau UL daim ntawv pov thawj thiab siv UL cim txhua xyoo. Tam sim no muaj ntau tshaj 800 txheej txheem UL, ntawm 75% tau txais los ntawm American National Standard Institute (ANSI: American National Standard Institute).

Tam sim no, UL muaj tsib lub chaw soj nstuam hauv Tebchaws Meskas, lub hauv paus hauv North brook Town, sab qaum teb ntawm Chicago, thiab tsim cov chaw soj nstuam sib xws hauv Taiwan thiab Hong Kong. Muaj peb hom UL daim ntawv pov thawj kev nyab xeeb: kev lees paub, kev sau npe, kev faib tawm, thiab peb txoj hauv kev ntawm kev cim yog txawv.

1. UL daim ntawv teev npe kev pabcuam yog qhov kev pabcuam zoo tshaj plaws hauv UL daim ntawv pov thawj kev nyab xeeb. UL teev cov cim ntawm cov khoom txhais tau hais tias cov chaw tsim khoom tso cai UL kuaj cov qauv raws li cov qauv kev nyab xeeb tau lees paub los ntawm Tebchaws Meskas. Nyob rau hauv cov xwm txheej tsim nyog thiab pom tau, cov qauv yuav tsis ua rau hluav taws, xau thiab muaj feem cuam tshuam.

2. Cov kev pabcuam tivthaiv pom zoo yog kuaj cov khoom lossis cov khoom tsis tiav, thiab cov khoom siv no yuav raug siv hauv UL cov npe khoom. UL cov kev pab cuam pom zoo suav nrog ntau lab ntawm cov yas, cov xov hlau thiab cov khoom siv hluav taws xob, nrog rau ntau yam khoom tiav, lossis cov khoom loj dua xws li maus taus lossis cov khoom siv fais fab.

3. UL graded cov khoom raug kuaj raws li cov khoom sib txawv, xaiv qhov kev phom sij, lossis cov xwm txheej tshwj xeeb. Feem ntau hais lus, feem ntau ntawm cov khoom tau qhab nia yog cov khoom siv hauv tsev lossis cov cuab yeej ua haujlwm. Cov khoom lag luam qib suav nrog cov khoom lag luam lossis cov khoom lag luam, uas tau xaiv cov khoom thaum lub sijhawm kuaj, suav nrog cov nplaim taws, kev ua haujlwm txaus ntshai lossis tshwj xeeb tshwj xeeb xav tau los ntawm tsoomfwv.