Illuminance ntsuas units thiab kev ua haujlwm
Ntau tus neeg muas zaub yuav hais tias, Kuv xav yuav ib lub illuminance meter, nws yog ntuj nug dab tsi yog chav tsev ntawm illuminance meter! Tam sim no cov lus qhia luv luv rau illuminance, illuminance ib chav tsev uas qhia txog kev siv lub teeb, nws lub ntsiab lus ntawm lub cev yog irradiated rau ib cheeb tsam ntawm luminous flux, illuminance unit yog tus naj npawb ntawm lumens ib square meter (Lm), los yog Lux (Lux) ): 1Lux=1Lm/m2. 1Lux=1Lm/m2. Raws li tuaj yeem pom los ntawm cov qauv saum toj no, Lm yog ib chav tsev ntawm cov luminous flux, uas txhais tau tias yog cov platinum ntshiab ntawm qhov kub ntawm cov yaj (kwv yees li 1770 ° C), qhov nyiaj ntawm lub teeb hluav taws xob nyob rau hauv lub tso suab lub kaum sab xis ntawm thaj chaw saum npoo hauv ib qho spherical degree ntawm 1/60 square meters. / 60 square metres ntawm thaj chaw ntawm thaj chaw hauv 1 lub kaum ntse ntse ntawm lub tso suab lub kaum sab xis ntawm cov nyiaj ntawm lub teeb hluav taws xob.
Illuminance Meters Requirements rau Daim Ntawv Thov
● Compact Size, Lub teeb yuag
Qhov loj me thiab lub teeb yuag yog qhov tsim nyog yuav tsum tau ua ua ntej rau lub ntsuas hluav taws xob portable uas tuaj yeem siv rau ntau yam kev siv thiab ntau qhov chaw.
Qhov tseeb
Qhov zoo thiab qhov tsis zoo ntawm lub ntsuas hluav taws xob, thiab nws qhov tseeb muaj kev sib raug zoo. Ntawm chav kawm, nws kuj yog ze ze rau nws tus nqi, yog li tus nqi tsim nyog yuav tsum raug siab dua ntawm lub ntsuas hluav taws xob yog qhov tsim nyog, feem ntau rau qhov yuam kev tsis tshaj ± 15% yog qhov tsim nyog.
Xim Xaus
Cov hom teeb pom kev zoo nyob thoob plaws qhov chaw, qee qhov nyiam qhov ntev wavelengths ntawm lub teeb liab siab siab, lossis luv luv wavelengths ntawm xiav-violet xws li Hnub Teeb fluorescent teeb; kuj tseem muaj ntau qhov kev faib tawm xws li incandescent qhov muag teev series, tib lub teeb pom kev zoo rau qhov sib txawv wavelengths ntawm nws rhiab heev yuav txawv me ntsis, yog li qhov tsim nyog them nyiaj yog tsim nyog.
Cosine Compensation
Raws li peb txhua tus paub, qhov ci ntsa iab ntawm qhov illuminated nto yog cuam tshuam nrog lub kaum sab xis ntawm qhov xwm txheej ntawm lub teeb ci. Ib yam li ntawd, thaum siv lub luminance meter los ntsuas, lub kaum sab xis ntawm lub sensor thiab qhov teeb meem teeb pom kev zoo yuav ua rau muaj kev cuam tshuam rau kev nyeem ntawv luminance meter. Yog li ntawd, ib tug zoo illuminance meter seb lub cosine nyiaj ua hauj lwm yuav tsum tsis txhob ignored.
