Calibration txoj cai:
Cia Ls irradiate lub photocell vertically → E=I/r2, hloov r kom tau tus nqi photocurrent nyob rau hauv txawv illuminance, thiab hloov lub teev tam sim no mus rau lub illuminance scale raws li kev sib raug zoo ntawm E thiab i.
Txoj kev Calibration:
Siv lub teeb siv hluav taws xob siv hluav taws xob, ntawm qhov chaw ua haujlwm zoo ib yam li qhov chaw teeb pom kev zoo, hloov qhov nrug l ntawm photocell thiab cov teeb pom kev zoo, sau cov ntawv nyeem ntawm lub galvanometer ntawm txhua qhov kev ncua deb, thiab suav cov illuminance E los ntawm txoj cai inverse square. ntawm kev ncua deb E=I/r2, los ntawm A series ntawm photocurrent qhov tseem ceeb i nrog sib txawv illuminance tuaj yeem tau txais, uas tuaj yeem siv los ua qhov hloov pauv ntawm photocurrent i thiab illuminance E, uas yog calibration nkhaus ntawm lub illuminometer.
Yam tseem ceeb uas cuam tshuam rau calibration nkhaus:
Lub photocell thiab galvanometer yuav tsum tau rov calibrated thaum lawv hloov; lub illuminometer yuav tsum tau rov ntsuas dua tom qab siv lub sijhawm (feem ntau 1-2 zaug hauv ib xyoos); high-precision illuminometers tau calibrated nrog lub teeb siv tus qauv teeb; Lub calibration ntau ntawm lub illuminance meter tuaj yeem hloov qhov kev ncua deb r, thiab cov txheej txheem sib txawv tuaj yeem siv tau, thiab cov ammeter me me tuaj yeem xaiv.
