1.Summary
PHS-3C series digital PH meter is a high-precision instrument used in laboratory to measure pH value of
aqueous solution, it can be used for testing pH and mV. Using E201 composite electrode ,fast reflection
and good stability.The series of instruments are widely used in many subjects and fields such as scientific
research, teaching, industry and agriculture.
2.Working principle
Converting the hydrogen iron activity in solution into electric energy by the sensor (pH composite
electrode ), then input the energy to the instrument by op-amp and inspection flow. A/D converter
into a digital display.
3. The main technical performance and working conditions
| type |
Function |
spec |
Resolution |
Accuracy |
| PHS-3C |
pH
mV |
(-1-15.00)pH
(-1999~+1999)mV |
0.01pH
1mV |
±0.01pH
±0.1%F·S |
Temperature compensation range:(0-100)ºC
Electrode input current: ≤1х10
-12 A
Indication error caused by electrode input impedance:±0.01pH
Temperature compensator error:±0.02pH
Repeatability of electrode indication: 0.02pH
Temperature compensation range:(0-100)ºC
Electrode input current: ≤1х10
-12 A
Indication error caused by electrode input impedance:±0.01pH
Temperature compensator error:±0.02pH
Repeatability of electrode indication: 0.02pH
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