Yuav ua li cas kom raug khiav lag luam thiab siv ib tug handheld lux meter?
① Tig lub zog.
② Qhib lub hau ntawm lub photodetector thiab tso lub photodetector kab rov tav ntawm txoj hauj lwm ntsuas.
③ Xaiv lub iav ntsuas tsim nyog.
Yog tias tsuas yog "1" tso tawm rau ntawm sab laug kawg ntawm cov zaub, nws txhais tau hais tias lub teeb pom kev ntau dhau, thiab koj yuav tsum nias qhov tseem ceeb (⑧ qhov tseem ceeb) los kho qhov ntsuas ntau.
④ Lub illuminance meter pib ua hauj lwm thiab qhia cov illuminance tus nqi ntawm cov zaub.
⑤ Cov ntaub ntawv tso tawm ntawm lub vijtsam zaub hloov tas li. Thaum cov ntaub ntawv tso tawm yog qhov ruaj khov, nias HOLD tus yuam sij txhawm rau xauv cov ntaub ntawv.
⑥ Nyeem thiab sau cov txiaj ntsig pom tshwm hauv tus nyeem ntawv. Tus nqi pom zoo yog sib npaug ntawm cov khoom ntawm tus lej tso tawm ntawm qhov nyeem ntawv thiab tus nqi ncua.
Piv txwv li: 500 tso tawm kom pom ntawm lub vijtsam, cov xwm txheej tshwm sim nyob rau hauv kaum sab xis yog "× 2000", thiab qhov ntsuas qhov pom kev yog 1000000lx, uas yog (500 × 2000).
⑦ Nias lub ntsuas phoo dua kom thim qhov kev nyeem ntawv ntsuas phoo.
⑧ Rau txhua qhov kev soj ntsuam, nyeem peb ntu sib law liag thiab sau lawv.
⑨ Tom qab txhua qhov kev ntsuas tiav, nias lub hwj huam hloov yuam sij kom txiav tawm lub hwj chim.
⑩ Kaw lub photodetector npog thiab muab nws rov qab rau hauv lub thawv.
Lub illuminance meter (los yog lux meter) yog ib qho cuab yeej tshwj xeeb hauv kev ntsuas luminosity thiab brightness. Nws yog los ntsuas lub teeb siv (illuminance) yog qhov degree uas cov khoom yog illuminated, uas yog, qhov piv ntawm cov luminous flux tau nyob rau saum npoo ntawm cov khoom mus rau qhov chaw illuminated. Lub ntsuas hluav taws xob feem ntau yog tsim los ntawm selenium photocell lossis silicon photocell thiab microammeter.
