1、 measuring range
a) pH : (0.00～14.00)pH
b) mV : (0～±1999.0)mV
c) temperature ：(-5.0～105.0)℃
2、error of electronic unit
a、PH：±0.01PH ± 1 bytes
b、mV：±0.03%FS± 1 bytes
c、temperature：±0.3℃± 1 bytes
3、input current of electronic unit: < 1×10-12A
4、input resistance of electronic unit: >3×1012Ω
5、stability of electronic unit: ±0.3 mV± 1 bytes/3h
6、sensitivity of control titration : ±2mV
7、error of burette capacity: 10ml burette：±0.025ml 20ml burette：±0.035ml
8、burette infusion or infusion rate: 55±10s
9、repeatability of titration analyzing : 0.2%
,
