... function 4.can set buffer 5.Ion Analyzer Characteristics:1.Novel touching LCD screen;2.With multi-points calibration((max/mum five ... points calibration) function, can set buffer solutions groups by yourself3.With major ion mode, such as: H+,Ag+,Na+,K+,NH4+,CI ... ,mol/L,PX6.Set self-defining ion mode, and can also measure the other ion7.With RS-232 interface, TP-16 printer ...