... design consisting of three sections: capacity titration unit (can be replaced by Coulomb titration unit), control unit ( can be replaced by PC titration software ... of the tube)3, Stability: ±0.3mV±1 bit/3h4, Power supply: AC (220±22)V,(50±1)Hz5, Dimension ( mm ... .1°C;3, Electronic unit error: a,PH:±0.01PH ± 1bit b,mV:±0.03%FS c,Temperature:±0.3°C± 1 bit4, Control titration ...