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Method of measuring solution electroconductivity

A measurement method, conductivity technology, applied in the direction of fluid resistance measurement, material resistance, etc., can solve the problems of large error and large influence of measurement results

Inactive Publication Date: 2003-12-03
METTLER TOLEDO INSTR SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This measurement and calculation method is greatly affected by reactive components such as sensor polarization and distributed capacitance, resulting in large errors in measurement results.

Method used

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Embodiment Construction

[0009] The present invention, promptly a kind of measuring method of solution conductivity, comprises the following steps:

[0010] Measure the voltage and current value of the solution;

[0011] Calculate the active value, that is:

[0012] W 有 =∫U×Idt (2);

[0013] According to the relationship between the active value and the resistance component, that is: W 有 =R×∫I 2 dt, and according to the conductivity G=C / R, combined with the formula (2), the calculation formula of the conductivity is obtained, namely:

[0014] G=C·∫I 2 dt / ∫U×Idt (3);

[0015] Substitute the measured voltage and current values ​​into (3) to obtain the conductivity value.

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Abstract

A method for measuring the electric conductivity of a solution includes measuring voltage and current, calculating active value, deriving the calculation equation of electric conductivity, and calculation. Electric conductivity of solution is indirectly calculated by measuring consumption W of solution.

Description

technical field [0001] The invention relates to a method for measuring and calculating the conductivity of a solution. Background technique [0002] The current measurement method of solution conductivity is generally by measuring the voltage U at both ends of the solution and passing the solution current I, and calculating the conductivity of the solution with formula (1), that is, the conductivity G is: [0003] G=C·I / U (1) [0004] Where: C is the cell constant. [0005] This measurement and calculation method is greatly affected by the reactive components such as sensor polarization and distributed capacitance, which makes the measurement results have large errors. Contents of the invention [0006] The purpose of the present invention is to provide a conductivity measurement method that can avoid the influence of sensor polarization and distributed capacitance, and obtain accurate solution conductivity values. [0007] A kind of measuring method of solution...

Claims

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Application Information

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IPC IPC(8): G01N27/06G01R27/22
Inventor 姚宏
Owner METTLER TOLEDO INSTR SHANGHAI
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