Thaum siv lub ntsuas hluav taws xob UV, nco ntsoov qhov ntsuas kub ib puag ncig.
Thaum siv, yuav tsum tau saib xyuas kom tsis txhob tau txais lub teeb muaj zog, vim hais tias lub cathode ntawm lub phototube raug rau lub teeb muaj zog rau lub sij hawm ntev, qaug zog yuav tshwm sim, thiab emission ntawm photocathode yuav 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.
