PH-990 pH/毫伏/电导/温度计
测量范围： 0--14.00 pH,    0--+/-1999mV,    0--2x10000us,    0--100℃  
精度：     +/-0.01 pH,     +/-0.1%F.S,       +/-1%F.S,       +/-0.5℃,
分辨率：   0.01pH,  1mV,  0.001,  0.1℃,
温度范围： 0--100℃ (ATC) ,
标定：二点定位校准标定(4.01pH 或 6.86pH;4.01pH或9.18pH),
供电电源:       AC 220V/110V
PH-990 PH/MV/Conductivity/Temp Meter
Range:      0.00--14.00 pH,  0--+/-1999mV,  0--2x10000us,  0--100C,  
Accuracy:    +/-0.01pH,       +/-0.1%F.S,    +/-1%F.S,      +/-0.5℃,
Resolution:  0.01pH,       1mV,          0.001,        0.1℃,
Calibration:  Two-point at 4.01pH or6.86pH or 9.18pH,  Temp.℃:     0--100℃(ATC),
Battery Life:  AC 220V/110V