Model:                        3 ^1/2 LED digital display
Manual temperature compensation function
One-point or two-point calibration
International standard symbol

Specification:    1. Level: 0.01 lelve
2．Measuring range: pH: (0~14.00) pH
　　　　　　　　 mV: （0~±1999）mV (automatic polarity display)
3．Min. display unit: 0.01 pH，l mV
4. Temperature compensation range: （0~60）℃
5．Basic errorof electronic unit: pH: ±0.01 pH
　　　　　　　　　　　　　　　　 mV: ±1 mV±l word
6．Basic error: ±0.02 pH±1 word
7．Input current of electronic unit：no more than 2×10^-12A
8．Input impedance of electronic unit：more than l×10¹²Ω
9．Temperature compensation error: ±0.01 pH
10．Repeatability error of electronic unit: pH: 0.01 pH
　　　　　　　　　　　　　　 mV: l mV
11．Repeatability error of the instrument: no more than 0.01 pH
12．Stability of electronic unit：0.01 pH±l word／3h
13．Outside dimension: 1×b×h, mm：260×190×70
14．Weight: 1.5kg
15．Normal operating conditions
a) Ambient temperature: (5~40)℃；
b) Relative humidity: no more than 85％;
c) Electric power supply: AC (220±22)V, (50±l )Hz;
d) No other magnetic interference excepting geomagnetic field