Illuminance meter hloov kho kom ci
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 hauv lub illuminance scale raws li kev sib raug zoo ntawm E thiab i.
Txoj kev Calibration:
Siv lub teeb siv hluav taws xob teeb pom kev zoo, nyob rau hauv qhov kev ua haujlwm ntawm qhov kwv yees ntawm qhov chaw teeb pom kev zoo, hloov qhov kev ncua deb l ntawm lub photocell thiab cov teeb pom kev zoo, sau cov ntawv nyeem ntawm ammeter ntawm txhua qhov kev ncua deb, thiab xam qhov illuminance E los ntawm txoj cai inverse square. ntawm qhov deb E=I/r2, thiab mam li xam qhov illuminance E los ntawm Qhov no tuaj yeem tau txais cov txiaj ntsig ntawm photocurrent i nrog cov teeb pom kev sib txawv, thiab ua rau qhov kev hloov pauv ntawm photocurrent i thiab illuminance E, uas yog calibration nkhaus ntawm lub illuminance meter. Los ntawm qhov no, lub calibration ntawm lub illuminance meter yuav ua tau los ntawm kev faib lub dial ntawm lub illuminance meter.
Cov yam ntxwv cuam tshuam rau calibration nkhaus:
Recalibration yuav tsum tau thaum lub photocell thiab ammeter hloov; tom qab lub illuminance meter tau siv rau ib lub sij hawm, lub illuminance meter yuav tsum recalibrated (feem ntau 1-2 zaug nyob rau hauv ib xyoos); high-precision illuminance meters yuav calibrated nrog lub teeb siv tus qauv teeb; nthuav Cov calibration ntau yam ntawm lub illuminance meter yuav hloov qhov kev ncua deb r, los yog xaiv txawv qauv teeb, thiab xaiv ib tug me me galvanometer.
