Dab tsi ntawm illuminometers koom nrog?
1. Visual illuminance meter: siv tsis yooj yim, tsis muaj tseeb, tsis tshua siv
2. Photoelectric illuminance meter: feem ntau siv selenium photocell illuminance meter thiab silicon photocell illuminance meter
Muaj pes tsawg leeg thiab siv yuav tsum tau ntawm lub photoelectric illuminance meter:
1. Composition: Microammeter, hloov pob qhov rooj, xoom taw tes hloov kho, davhlau ya nyob twg, photocell, V (λ) kho lim, thiab lwm yam.
Feem ntau siv selenium (Se) photocell lossis silicon (Si) photocell illuminance meter, tseem hu ua lux meter
2. Yuav tsum tau siv:
Lub teeb ntsuas ntsuas ntsuas yog ua los ntawm iav, uas yooj yim rau kev tawg thiab tawg, thiab cov nyhuv dej tsis zoo thaum siv
① Photocells yuav tsum siv selenium (Se) photocells lossis silicon (Si) photocells nrog zoo linearity; lawv tseem muaj peev xwm tswj tau zoo stability thiab siab rhiab heev tom qab ua hauj lwm ntev; Thaum E yog siab, xaiv photocells nrog siab sab hauv tsis kam, uas muaj tsawg rhiab heev thiab zoo linearity, tsis yooj yim puas los ntawm lub teeb muaj zog.
② Muaj V (λ) kho lim sab hauv, uas yog tsim rau lub teeb pom kev zoo nrog cov xim sib txawv, thiab qhov yuam kev me me
③Ntxiv lub cosine lub kaum sab xis compensator (opalescent 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 ntsuas hluav taws xob yuav tsum ua haujlwm ntawm chav tsev kub lossis ze rau chav sov (photocell drift hloov nrog kub)
