1、 Overview
PHS—3CtypepHJi is a digital displaypHplan,It adopts white backlight and dual row digital display LCD, which can display simultaneouslypHTemperature value or potential(mV)Temperature value. This instrument is suitable for sampling and determining aqueous solutions in laboratories of colleges, research institutes, environmental monitoring, industrial and mining enterprises, and other departmentspHValue and potential(mV)Value and matchingORPElectrode measurable solutionORP(Oxidation)-Reduction potential value. Paired with an ion selective electrode, the electrode potential value of the electrode can be measured. Instruments compared to the pastPHCompared to others, the slope of the electrode has been increasedE0Value display, convenient for users to adjust based on the slope of the electrode andE0Use values to evaluate the performance of electrodes and replace them in a timely manner. The instrument is equipped with a multifunctional electrode bracket for easier operation.

2、 Main technical performance of the instrument
1Instrument level:0.01level
2Measurement range:pH：(0.00~14.00) pH
mV：（0~±1999）mV(Automatic polarity display)
3Minimum display unit:0.01 pH，l mV，0.1℃
4Temperature compensation range:（0.0~100.0）℃.
5Basic error of electronic unit:pH：±0.01 pH
mV：±0.1％FS
6Basic error of the instrument:±0.02 pH±la character
7Electronic unit input current: not greater than2×10-12A
8Electronic unit input impedance: not less than1×1012Ω
9Temperature compensator error:±0.01 pH
10Repetitive error of electronic unit:pH：0.01 pH±la character
mV：1mV±la character
11Instrument repeatability error: not greater than0.01 pH±la character

12Stability of electronic unit:±0.01pH±lOne word/3h
13. External dimensions1×b×h，mm：240×180×70
14. HeavyQuantity:1.0kg
15Normal usage conditions
a)Ambient temperature(5~40)℃；
b)Relative humidity: not greater than85％；
c)Power supply:DC9V(400mA)；
d)There is no other magnetic field interference except for the Earth's magnetic field;
e)There is no significant vibration.

1Instrument level:0.01level
2Measurement range:pH：(0.00~14.00) pH
mV：（0~±1999）mV(Automatic polarity display)
3Minimum display unit:0.01 pH，l mV，0.1℃
4Temperature compensation range:（0.0~100.0）℃.
5Basic error of electronic unit:pH：±0.01 pH
mV：±0.1％FS
6Basic error of the instrument:±0.02 pH±la character
7Electronic unit input current: not greater than2×10-12A
8Electronic unit input impedance: not less than1×1012Ω
9Temperature compensator error:±0.01 pH
10Repetitive error of electronic unit:pH：0.01 pH±la character
mV：1mV±la character
11Instrument repeatability error: not greater than0.01 pH±la character

12Stability of electronic unit:±0.01pH±lOne word/3h
13. External dimensions1×b×h，mm：240×180×70
14. HeavyQuantity:1.0kg
15Normal usage conditions
a)Ambient temperature(5~40)℃；
b)Relative humidity: not greater than85％；
c)Power supply:DC9V(400mA)；
d)There is no other magnetic field interference except for the Earth's magnetic field;
e)There is no significant vibration.