1. Visual illuminance meter: nws tsis yooj yim rau siv, qhov tseeb tsis siab, thiab nws tsis tshua siv;
2. Photoelectric illuminance meter: feem ntau siv selenium photovoltaic illuminance meter thiab silicon photovoltaic illuminance meter Muaj pes tsawg leeg thiab siv cov kev cai ntawm photovoltaic illuminance meter:
1. Composition: Microammeter, hloov pob qhov rooj, xoom taw tes hloov kho, khi ncej, photocell, V (λ) kho lim, thiab lwm yam. Feem ntau siv selenium (Se) photocell lossis silicon (Si) photocell illuminometer, los yog lux meter
2. Yuav tsum tau siv:
① Photocells siv selenium (Se) photocells lossis silicon (Si) photocells nrog zoo linearity; lawv muaj peev xwm tswj tau zoo stability tom qab ua hauj lwm mus sij hawm ntev, thiab muaj siab rhiab heev; Thaum siab E, xaiv lub siab sab hauv photocells, uas tsis tshua muaj rhiab heev thiab zoo linearity, tsis yooj yim puas los ntawm lub teeb pom kev zoo.
② Muaj V (λ) kho lim sab hauv, uas tsim nyog rau lub teeb pom kev sib txawv ntawm cov xim kub kub, thiab qhov yuam kev me me
③Ntxiv lub cosine lub kaum sab xis them nyiaj (opal dawb iav los yog yas dawb) nyob rau hauv pem hauv ntej ntawm lub photocell vim hais tias thaum lub teeb meem lub kaum sab xis loj, lub photocell deviates los ntawm txoj cai cosine.
④ Lub illuminometer yuav tsum ua haujlwm ntawm chav tsev kub lossis ze rau chav sov (photocell drift hloov nrog kub)
