... to set wavelength automatically,error free to adjust 0%T,100%T,T/A, and A,T,C direct reading.Also have functions of self diagnosis ... ,automatic establish standard curve,can choose the first order and a zero order linear regression method;standard curve can be stored ... 9999CLuminosity Precision±0.5%T(0~100%T)Luminosity Repetition Ratio±0.2%T(0~100%T)Stray Light≤0.1%T@340nmStability±0.002A ...