CN212905404U - Automatic calibration system for conductivity cell constant - Google Patents
Automatic calibration system for conductivity cell constant Download PDFInfo
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- CN212905404U CN212905404U CN202021162342.0U CN202021162342U CN212905404U CN 212905404 U CN212905404 U CN 212905404U CN 202021162342 U CN202021162342 U CN 202021162342U CN 212905404 U CN212905404 U CN 212905404U
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Abstract
The utility model discloses a calibration of solving present conductivity cell constant mainly uses manual operation as the standard, the not enough problem of its degree of automation, experiment environmental control level. The utility model discloses a conductivity cell constant automatic calibration system, including thermostatic bath, conductivity meter, drive arrangement and data processing apparatus, be equipped with first container, second container and third container in the thermostatic bath, first container with the standard potassium chloride solution of different concentrations is equipped with respectively in the third container, be equipped with the cleaning machine in the second container, drive arrangement is used for controlling the displacement of conductivity meter between first container, second container and third container. The utility model has the advantages that: manual operation is replaced by the driving device, so that the operation is simple and the efficiency is high; the real-time data monitoring of the temperature sensor is used, so that the automation of the calibration of the conductivity cell constant is realized, and human errors and environmental errors are reduced.
Description
Technical Field
The utility model relates to a sensor detection area especially relates to a conductivity cell constant automatic calibration system.
Background
The conductivity meter is a common electrochemical measuring instrument, is widely applied to the industries of thermal power, chemical fertilizers, metallurgy, environmental protection, pharmacy, biochemistry, food, tap water and the like at present, and is mainly used for continuously monitoring the conductivity value in a solution.
According to the conventional calibration procedure of the conductivity meter, JJG 376-2007 adds two parts of calibration of temperature coefficient indicating errors and calibration of conductivity cell constants according to the development condition of the current conductivity meter. At present, the calibration of the conductivity cell constant is mainly based on manual operation, and the automation degree and the experimental environment control are relatively deficient, so that an automatic conductivity cell constant calibration device needs to be designed according to the requirements of calibration regulations, and the automatic conductivity cell constant calibration of a conductivity meter is realized.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a calibration of solving present conductivity cell constant mainly uses manual operation as the standard, the not enough problem of its degree of automation, experiment environmental control level.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme: the utility model provides a conductivity cell constant automatic calibration system, includes thermostatic bath, conductivity meter, drive arrangement and data processing apparatus, be equipped with first container, second container and third container in the thermostatic bath, first container with the standard potassium chloride solution of different concentrations is equipped with respectively in the third container, be equipped with the cleaning machine in the second container, drive arrangement is used for controlling the displacement of conductivity meter between first container, second container and third container, first container the third container the cleaning machine with the thermostatic bath respectively with data processing apparatus communication connection.
Preferably, the driving device comprises a first support, a second support, a horizontal sliding table and a vertical sliding table, the horizontal sliding table is fixed between the first support and the second support, a horizontal sliding block is arranged on the horizontal sliding table, the vertical sliding table is arranged on the horizontal sliding block, and the conductivity meter is arranged on the vertical sliding table.
Preferably, the driving device comprises an electric trolley and a manipulator, the manipulator is arranged on the electric trolley, and the conductivity meter is arranged on the manipulator.
Preferably, the lower end of the conductivity meter is provided with a conductivity cell.
Preferably, a first temperature sensor is arranged in the first container and is in communication connection with the data processing device, and a second temperature sensor is arranged in the third container and is in communication connection with the data processing device.
Preferably, the second container is disposed between the first container and the third container.
Compared with the prior art, the utility model has the advantages that:
1, manual operation is replaced by a driving device, so that the operation is simple and the efficiency is high;
and 2, the data are monitored in real time by virtue of the temperature sensor, so that the automation of calibrating the conductivity cell constant is realized, and human errors and environmental errors are reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The embodiments of the present invention will be further explained with reference to the accompanying drawings:
the first embodiment is as follows: as shown in fig. 1, an automatic calibration system for conductivity cell constant comprises a constant temperature bath, a conductivity meter, a driving device and a data processing device, wherein the constant temperature bath is set to be 25 degrees deviation +/-0.3 ℃, a first container, a second container and a third container are arranged in the constant temperature bath, and the second container is arranged between the first container and the third container. The first container and the third container are respectively filled with standard potassium chloride solutions with different concentrations, wherein the first container is filled with 74.2457g/1000mL (room temperature at 20 ℃) of the standard potassium chloride solution, the third container is filled with 7.4365g/1000mL (room temperature at 20 ℃) of the standard potassium chloride solution, and the relative uncertainty of the selected standard solution is less than or equal to 0.25.
The second container is internally provided with a cleaning machine, and the driving device is used for controlling the displacement of the conductivity meter among the first container, the second container and the third container. The driving device comprises a first support, a second support, a horizontal sliding table and a vertical sliding table, wherein the horizontal sliding table is fixed between the first support and the second support, a horizontal sliding block is arranged on the horizontal sliding table, the vertical sliding table is arranged on the horizontal sliding block, and the conductivity meter is arranged on the vertical sliding table. The lower end of the conductivity meter is provided with a conductivity cell. The temperature control device is characterized in that a first temperature sensor is arranged in the first container, the first temperature sensor is connected with the data processing device through a data acquisition card, a second temperature sensor is arranged in the third container, and the second temperature sensor is connected with the data processing device through the data acquisition card. The cleaning machine and the thermostatic bath are respectively connected with the data processing device through serial ports. The data processing device is one or more of an industrial personal computer, a smart phone or a tablet personal computer and the like.
Example two: the driving device comprises an electric trolley and a mechanical arm, wherein the mechanical arm is arranged on the electric trolley, and the mechanical arm controls the conductivity meter to move. The other structures are the same as the first embodiment.
When the system is used,
(1) setting the temperature of the thermostatic bath to be 25 ℃, and controlling the horizontal electric sliding table and the vertical electric sliding table to reset;
(2) setting the parameters of the conductivity meter to be measured, and adjusting the constant of the conductivity cell to be KR(typically 1.000 cm)-1)；
(3) Controlling the horizontal electric sliding table, and enabling the conductivity meter to be measured to be positioned at the right upper end of the cleaning machine through horizontal displacement;
(4) controlling the water vertical electric sliding table, and enabling the conductivity meter to be measured to extend into the cleaning machine through vertical displacement;
(5) and controlling the cleaning machine to operate, and cleaning and drying the conductivity cell part of the conductivity meter to be detected.
(6) And controlling the vertical electric sliding table to reset.
(7) And controlling the horizontal electric sliding table to enable the conductivity meter to be detected to be positioned at the upper end of the first container port through horizontal displacement.
(8) And controlling the water vertical electric sliding table, and immersing the conductivity cell of the conductivity meter to be measured into the standard potassium chloride solution in the first container through vertical displacement.
(9) Collecting data T1 of the first temperature sensor in real time, and reading the measured value K of the conductivity meter to be measured by the data processing device when the T1 is 25 ℃ and the fluctuation value is less than +/-0.3 DEG CM1And calculating the conductance cell constant K according to the following formula1。
In the formula: ks1As a conductivity value of the standard solution 1 at 25 ℃, the table is looked up as 0.11131S-cm-1。
(10) And controlling the vertical electric sliding table to reset. And (5) repeating the steps (3) to (6) to clean the conductivity meter to be measured.
(11) And controlling the horizontal electric sliding table, and enabling the conductivity meter to be detected to be positioned right above the third container through horizontal displacement.
(12) And controlling the water vertical electric sliding table, and immersing the conductivity cell of the conductivity meter to be measured into the standard potassium chloride solution in the third container through vertical displacement.
(13) Collecting data T2 of the second temperature sensor 11 in real time, and reading the measured value K of the conductivity meter to be measured by the data processing device when the T2 is 25 ℃ and the fluctuation value is less than +/-0.3 DEG CM2And calculating the conductance cell constant K according to the following formula2。
In the formula: ks2The conductivity value of the standard solution 2 at 25 ℃ is obtained by looking up the table as 0.012852S-cm-1。
(14) Repeating the steps (3) to (13), measuring for three times, and respectivelyCalculating the calculated number average value of the conductivity cell constant obtained by three times of measurement
And
(15) calculated according to the following formula
And
the average value of (A) is used as the conductance cell constant of the conductivity meter to be measured.
(16) And controlling the vertical electric sliding table to reset. And (5) repeating the steps (3) to (6) to clean the conductivity meter to be measured.
(17) And controlling the horizontal electric sliding table to reset, and finishing calibration.
The above description is only for the specific embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present invention.
Claims (6)
1. The utility model provides a conductivity cell constant automatic calibration system, its characterized in that, includes constant temperature bath, conductivity meter, drive arrangement and data processing apparatus, be equipped with first container, second container and third container in the constant temperature bath, first container with the standard potassium chloride solution of different concentrations is equipped with respectively in the third container, be equipped with the cleaning machine in the second container, drive arrangement is used for controlling the displacement of conductivity meter between first container, second container and third container, first container the third container the cleaning machine with the constant temperature bath respectively with data processing apparatus communication connection.
2. The automatic calibration system for the conductivity cell constant according to claim 1, wherein the driving device comprises a first support, a second support, a horizontal sliding table and a vertical sliding table, wherein the horizontal sliding table is fixed between the first support and the second support, the horizontal sliding table is provided with a horizontal sliding block, the horizontal sliding block is provided with the vertical sliding table, and the vertical sliding table is provided with the conductivity meter.
3. The automatic calibration system for the conductivity cell constant according to claim 1, wherein said driving device comprises an electric cart and a manipulator, said manipulator is disposed on said electric cart, and said conductivity meter is disposed on said manipulator.
4. The automatic calibration system for the constant of the conductivity cell according to claim 2 or 3, wherein the conductivity meter is provided with a conductivity cell at the lower end thereof.
5. The automatic calibration system for the conductivity cell constant according to claim 1, wherein a first temperature sensor is disposed in said first container, said first temperature sensor is in communication with said data processing device, and a second temperature sensor is disposed in said third container, said second temperature sensor is in communication with said data processing device.
6. The automated conductivity cell constant calibration system according to claim 1, wherein said second container is disposed between said first container and said third container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021162342.0U CN212905404U (en) | 2020-06-20 | 2020-06-20 | Automatic calibration system for conductivity cell constant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021162342.0U CN212905404U (en) | 2020-06-20 | 2020-06-20 | Automatic calibration system for conductivity cell constant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212905404U true CN212905404U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021162342.0U Active CN212905404U (en) | 2020-06-20 | 2020-06-20 | Automatic calibration system for conductivity cell constant |
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| CN (1) | CN212905404U (en) |
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- 2020-06-20 CN CN202021162342.0U patent/CN212905404U/en active Active
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