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Residual chlorine electrode calibration method and water quality detection instrument

A calibration method and technology for water quality detection, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of low system processing efficiency, no consideration of influence, data output interface, single communication mode, etc., to improve measurement accuracy, improve The effect of measuring accuracy, simplifying the calibration process

Inactive Publication Date: 2020-01-17
CHONGQING YUANTONG ELECTRONICS TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing calibration method is to deploy calibration liquid on site for calibration during use, which makes the data collection steps cumbersome, time-consuming, and inconvenient; and does not consider the influence of temperature and pH on the sensor, and cannot correct the measurement deviation caused by changes in temperature and pH
[0004] In addition, the existing data collection and analysis of water quality testing is currently mainly realized through specific sensors and specific analysis systems. The data output interface and communication mode are single, and they are out of touch with today's rapidly developing wireless signal transmission mode.
The existing water quality testing instruments usually set the AD conversion module in the sensor component part, and the memory is set in the remote terminal part; then the actual instrument control system includes an AD conversion module, an analysis module, and a remote terminal module for display and storage; equivalent to The control system is divided into three parts, the structure is scattered, and the lack of a centralized control system for comprehensive collection, analysis, and transmission makes the existing system low in processing efficiency and high in power consumption

Method used

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  • Residual chlorine electrode calibration method and water quality detection instrument
  • Residual chlorine electrode calibration method and water quality detection instrument

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, this embodiment provides a residual chlorine electrode calibration method, including the following steps:

[0034] S1, before using the instrument, measure the zero point current of the residual chlorine electrode and the output current of the residual chlorine electrode in at least one set of standard solutions with known concentrations at different temperatures and / or pH values;

[0035] S2, according to the output current, zero current and residual chlorine concentration, when calculating different temperatures and / or pH values, the constants in the relationship function between the output current and zero current and residual chlorine concentration, to obtain different temperatures and / or pH values When the relationship function;

[0036] S3, when the instrument is in use, according to the current temperature and / or pH value of the detection environment, call the relational function corresponding to the temperature and / or pH value to cali...

Embodiment 2

[0047] This embodiment provides a specific implementation of a method for calibrating a residual chlorine electrode.

[0048] Before leaving the factory, under the conditions of PH=6, 6.5, 7, 7.5, and 8, the zero point and slope were measured in the laboratory under the three conditions of temperature T=20, 25, and 30°C. The chamber can be configured with multiple solutions at one time for calibration. The measurement of residual chlorine can be expressed by the formula I=a*Cl+b, wherein, I represents the output current, a represents the slope, Cl represents the concentration of residual chlorine, and b represents the zero point current. Then the instrument internally stores 15 sets of slope and zero point current (referred to as zero point). Correspondingly denoted as a 0 ~a 14 and b 0 ~b 14 These 15 sets of data records.

[0049] After completing the measured data, input these 15 sets of data inside the instrument respectively, and then perform linear interpolation cal...

Embodiment 3

[0055] Such as figure 2 As shown, this embodiment provides a water quality detection instrument, including a sensor assembly 1, a data analysis and processing system 2, a human-computer interaction device 3 and a remote terminal 4;

[0056] The output ends of the sensor assembly 1 are respectively connected to the input interfaces of the data analysis and processing system 2; the output ends of the data analysis and processing system 2 are respectively connected to the input ends of the human-computer interaction device 3 and the remote terminal 4;

[0057] The sensor assembly 1 includes a temperature sensor, a pH electrode, and a residual chlorine electrode; the data analysis and processing system 2 includes an AD conversion module, a calibration module, an analysis module, and a memory; A series of constants obtained by the electrode calibration method, the calibration module uses the residual chlorine electrode calibration method described in Example 1 to calibrate the rea...

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Abstract

The invention discloses a residual chlorine electrode calibration method and a water quality detection instrument. The residual chlorine electrode calibration method comprises the following steps: S1,before the instrument is used, measuring the zero current of a residual chlorine electrode and the output current of the residual chlorine electrode in at least one group of standard solutions with known concentration at different temperatures and / or pH values; S2, according to the output current, the zero current and the residual chlorine concentration, calculating constants in relation functional expressions of the output current, the zero current and the residual chlorine concentration at different temperatures and / or pH values, and obtaining the relation functional expressions at different temperatures and / or pH values; and S3, when the instrument is used, calling the reading of a relation function type calibration sensor corresponding to the temperature and / or the pH value accordingto the current temperature and / or the pH value of a detection environment, and outputting the corrected measured residual chlorine concentration.

Description

technical field [0001] The invention relates to the field of water quality monitoring, in particular to a residual chlorine electrode calibration method and a water quality detection instrument. Background technique [0002] Water quality testing usually needs to collect residual chlorine, turbidity, PH, and temperature parameters of the water to be tested, so as to accurately collect the current water quality parameters, and then assist relevant personnel in subsequent management or water quality optimization. [0003] A residual chlorine electrode is usually used as a sensor for detecting residual chlorine parameters. The detection accuracy of the residual chlorine electrode is related to temperature, pH and the characteristics of the sensor itself. Therefore, in the existing water quality detection operation, the residual chlorine electrode needs to be calibrated before data collection and analysis. The calibration of the residual chlorine electrode includes zero point c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00G01N27/30G01N27/416
CPCG01N27/00G01N27/30G01N27/4163
Inventor 岳敏张元禾陈思远卢利利谢艳
Owner CHONGQING YUANTONG ELECTRONICS TECH DEV CO LTD
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