... working curve with three points used for calculating concentrations.Auto 0%(T)and 100%(T)function.Direct-reading concentration by setting ... , at 500nmT-A Transform Error ≤±0.002A (at 0.5 A,≤±0.004A (at 1.0 A)Photometric Range: 0-199.9% T, 0.3-2.5 A, 1-9999 ... F, 0-9999 CData ...