Thaum siv lub ntsuas hluav taws xob UV, nco ntsoov qhov ntsuas kub hauv zos.
Thaum siv, yuav tsum tau saib xyuas kom tsis txhob tau txais lub teeb muaj zog, vim tias cathode ntawm lub phototube yuav qaug zog yog tias nws raug rau lub teeb muaj zog ntev, uas yuav ua rau lub photocathode emit txawv txav. Yog li ntawd, qhov kev tiv thaiv ntawm lub qhov rais yuav tsum tau them thaum lub illuminance meter tsis siv. Tsis tas li ntawd, qhov ntsuas kub ntawm lub ntsuas hluav taws xob ultraviolet yuav tsum tsis txhob siab heev lossis qis. Tshwj xeeb tshaj yog ultraviolet illuminance meter uas siv cov ntsiab lus thermoelectric raws li tus neeg txais yuav tsum nruj dua ntawm qhov ntsuas kub (feem ntau ntawm 20 degree); thiab thaum lub photoelectric cell GD-5 siv los ua tus txais, cov kev cai ntawm qhov kub thiab txias tsis nruj heev. Feem ntau hais lus, qhov kub thiab txias, qhov zoo dua; kom txo tau qhov tsaus nti tam sim no. Tsis tas li ntawd, thaum ntsuas qhov hluav taws xob ntawm lub teeb pom kev zoo, nws yuav tsum nyob rau sab xis ntawm lub qhov rais ntawm lub receiver. Yog tias nws qaij, nws yuav tsim qhov yuam kev loj. Lub sijhawm no yuav tsum tau kho lub kaum sab xis.
Hom illuminance meters 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 tsim nyog 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)
