... Measurement method: the end of law, rate method, two-point method, dual-wavelength method, multi-standard method, the absorbance ... method, and can choose factor method, single-point calibration method, multi-point calibration method and linear regression method* Resolution: ... supply: AC 220 (1 ± 10%) V; (50 ± 1) Hz• Relative humidity: ≤ 80% RH* Power: ≤ 100VA* Dimensions: 330mm × 310mm × 175mm ...