... Vis Spectrophotometer, Visible Spectrophotometer, Flame Photometer, Whiteness Meter, Turbidity Meter, Colorimeter, Gloss Meter, Tintometer, Automatic Polarimeter, Auto Melting Point ... two points calibration function, it will prompt pH calibration solution when you calibrate the meter. You need ... solution and press ENTER key, then the meter will be calibrated automatically.Auto-Buffer Recognition:In ...