Lub hauv paus ntsiab lus ntawm kev ntsuas, hom thiab calibration ntawm illuminance meters
Illuminance Meter Ntsuas Txoj Cai.
Photovoltaic cell yog cov khoom siv hluav taws xob uas ncaj qha hloov lub teeb lub zog rau hauv hluav taws xob hluav taws xob. Thaum lub teeb mus rau saum npoo ntawm selenium photovoltaic cell, qhov teeb meem teeb pom kev los ntawm cov hlau zaj duab xis 4 mus txog rau semiconductor selenium txheej 2 thiab cov hlau zaj duab xis 4 nyob rau hauv lub division nto, nyob rau hauv lub interface photoelectric nyhuv. Tsim qhov loj me ntawm qhov sib txawv ntawm qhov sib txawv nrog lub teeb photocell ntawm qhov chaw ntawm lub teeb pom kev zoo muaj qee qhov kev faib ua feem. Lub sijhawm no, yog tias txuas nrog rau sab nraud Circuit Court, yuav muaj qhov tam sim no los ntawm tus nqi tam sim no los ntawm lux (Lx) raws li qhov ntsuas ntawm microampere meter qhia tawm. Qhov loj ntawm photocurrent nyob ntawm qhov siv ntawm qhov teeb meem teeb meem thiab qhov tsis kam nyob rau hauv Circuit Court. Lub illuminance meter muaj ib qho kev hloov khoom siv, yog li nws tuaj yeem ntsuas qhov siab illuminance thiab qis illuminance. Cited hom illuminance meter: 1. pom illuminance meter: tsis yooj yim rau siv, siab precision, tsis tshua siv 2. photoelectric illuminance meter: feem ntau siv selenium photoelectric cell illuminance meter thiab silicon photoelectric cell illuminance meter
Hom illuminance meter.
1. Visual illuminance meter: siv tsis yooj yim, tsis siab precision, tsis tshua siv
2. photoelectric illuminance meter: feem ntau siv selenium photoelectric cell illuminance meter thiab silicon photoelectric cell illuminance meter
Kev sib xyaw thiab kev siv ntawm photocell illuminance meter yuav tsum.
1. Composition: microampere meter, hloov pob qhov rooj, xoom hloov kho, davhlau ya nyob twg, photocells, V (λ) kho lim thiab lwm yam khoom.
Feem ntau siv selenium (Se) photocells lossis silicon (Si) photocells illuminance meter, tseem hu ua lux meter.
2. Siv cov kev cai.
① photocell daim ntawv thov ntawm zoo linearity ntawm selenium (Se) photocells los yog silicon (Si) photocells; Lub sijhawm ua haujlwm ntev tuaj yeem ua kom muaj kev ruaj ntseg zoo, thiab siab rhiab heev; siab E thaum xaiv lub siab sab hauv photocells, nws tsis tshua muaj rhiab heev thiab zoo linearity, tsis yooj yim puas los ntawm lub teeb ci irradiation.
② them nyob rau hauv lub V (λ) kho lim, haum rau illuminance nrog ib tug txawv xim kub lub teeb qhov chaw, qhov yuam kev me me
③ photocell ua ntej qhov sib ntxiv ntawm cosine lub kaum sab xis them nyiaj (opal iav lossis yas dawb) vim tias qhov xwm txheej yog qhov loj, lub photocell deviates los ntawm txoj cai cosine.
④ illuminance meter yuav tsum ua hauj lwm nyob rau hauv chav tsev kub los yog nyob ze ntawm chav tsev kub (photocell drift nrog kub hloov thiab hloov)
Calibration ntawm illuminance meter.
Calibration txoj cai.
Ua Ls ntsug irradiation photocell → E=I / r2, hloov r tuaj yeem tau txais nyob rau hauv qhov sib txawv illumination ntawm lub teeb tam sim no tus nqi, los ntawm E thiab i ntawm kev sib raug zoo ntawm qhov ntsuas tam sim no yog hloov mus rau qhov ntsuas hluav taws xob.
Txoj kev Calibration.
Kev siv lub teeb siv hluav taws xob teeb pom kev zoo, nyob ze rau qhov chaw ua haujlwm ntawm qhov chaw teeb pom kev zoo, hloov qhov kev ncua deb ntawm photocell thiab cov teeb pom kev zoo l, kaw nyob rau hauv qhov kev ncua deb ntawm ammeter nyeem ntawv, los ntawm inverse square txoj cai ntawm kev ncua deb E=I / r2 xam ntawm lub teeb illuminance E, uas tuaj yeem tau txais los ntawm ntau qhov sib txawv ntawm cov teeb pom kev sib txawv ntawm lub teeb tam sim no tus nqi ntawm i, rau lub photocurrent i thiab illuminance ntawm E nkhaus ntawm kev hloov, uas yog, rau lub illuminance ntawm lub calibration nkhaus ntawm lub calibration nkhaus ntawm lub illuminance ntawm lub illuminance yuav ua tau los ntawm lub dial ntawm lub dial. Qhov no yog lub calibration nkhaus ntawm lub illuminance meter.
Cov yam ntxwv cuam tshuam rau qhov calibration nkhaus.
Photocells thiab ammeter hloov yuav tsum tau rov calibrated; illuminance meter yuav tsum tau siv rau ib lub sij hawm ntawm lub sij hawm yuav tsum tau re-calibrated illuminance meter (feem ntau nyob rau hauv ib lub xyoo yuav tsum tau kuaj xyuas 1-2 zaug); high-precision illuminance meter tuaj yeem siv los kuaj xyuas lub teeb siv ntawm cov qauv teeb; nthuav qhov ntau ntawm illuminance meter tuaj yeem hloov pauv nyob rau hauv qhov kev ncua deb r, koj tuaj yeem xaiv cov qauv sib txawv ntawm cov teeb pom kev zoo, qhov kev xaiv ntawm qhov me me ntawm ammeter.
