Nuclear power plant on-line conductivity meter complete machine verification device

Abstract

The utility model relates to a nuclear power plant on-line conductivity meter complete machine verification device. The nuclear power plant on-line conductivity meter complete machine verification device comprises a tested instrument test assembly which is electrically connected with a tested on-line conductivity meter so as to acquire an output signal of the tested on-line conductivity meter and output a first test signal; the water inlet pressure limiting assembly is used for acquiring a tested solution; the hydrogen ion exchange column is mechanically connected with the water inlet pressure limiting assembly; the constant-current control assembly is mechanically connected with the hydrogen ion exchange column; the constant-temperature control assembly is mechanically connected with the constant-current control assembly; the standard conductivity test assembly is mechanically connected with the constant temperature control assembly and is used for testing the tested solution and outputting a second test signal; and the main control assembly is electrically connected with the tested instrument testing assembly and the standard conductivity testing assembly and is used for receiving the first testing signal and the second testing signal and outputting a verification result. According to the utility model, the on-line conductivity meter of the nuclear power plant is subjected to automatic complete machine verification, and the verification efficiency and accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment maintenance in nuclear power plants, in particular to an on-line conductivity meter integral calibration device for nuclear power plants. Background Art

[0002] In the equipment management of nuclear power plants, on-line chemical instruments are one of the important means for key equipment operation monitoring and fault diagnosis. The on-line conductivity meter can reflect the total amount of impurity ions in the steam-water circuit in real time, so as to reflect the situation of low-concentration anion pollutants in the circuit water.

[0003] At present, the calibration of on-line conductivity meters in nuclear power plants mainly uses a standard resistance box to test the output signal of the secondary instrument of the conductivity meter, and compares the tested signal with the standard signal to achieve the calibration work. There is a lack of an integral calibration scheme. However, the measurement of on-line conductivity meters in nuclear power plants is actually related to factors such as the temperature of the test sample, which cannot guarantee the measurement accuracy of the on-line conductivity meter, resulting in difficulties in ensuring the steam-water quality and safe operation of the unit. Therefore, there is an urgent need for a scheme that can perform integral calibration on on-line conductivity meters in nuclear power plants. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an on-line conductivity meter integral calibration device for nuclear power plants.

[0005] The technical solution adopted by the utility model to solve its technical problems is to construct an on-line conductivity meter integral calibration device for nuclear power plants, including:

[0006] A tested instrument test component for electrically connecting with the on-line conductivity meter to be tested to collect the output signal of the on-line conductivity meter to be tested and output a first test signal;

[0007] An inlet water pressure limiting component for obtaining the inlet water pressure of the tested solution;

[0008] A hydrogen ion exchange column mechanically connected to the inlet water pressure limiting component;

[0009] A constant current control component mechanically connected to the hydrogen ion exchange column;

[0010] A constant temperature control component mechanically connected to the constant current control component;

[0011] A standard conductivity test component mechanically connected to the constant temperature control component for testing the tested solution and outputting a second test signal; and

[0012] A main control component electrically connected to the tested instrument test component and the standard conductivity test component, for receiving the first test signal and the second test signal and outputting a calibration result.

[0013] Preferably, the standard conductivity test component includes:

[0014] A liquid storage container that is mechanically connected to the constant temperature control component and used to store the solution to be measured;

[0015] A conductivity meter, whose primary instrument is placed in the liquid storage container to test the solution to be measured, and whose secondary instrument is electrically connected to the main control component to input the second test signal thereto; and

[0016] A drain valve that is mechanically connected to the liquid storage container and electrically connected to the main control component and used to discharge the solution to be measured in the liquid storage container.

[0017] Preferably, the standard conductivity test component further includes:

[0018] An inlet valve for controlling the water inlet of the liquid storage container, whose water inlet is mechanically connected to the constant temperature control component, whose water outlet is mechanically connected to the liquid storage container, and whose control end is electrically connected to the main control component.

[0019] Preferably, the constant temperature control component includes:

[0020] A water bath that is mechanically connected to the constant current control component and the standard conductivity test component and electrically connected to the main control component and used to keep the temperature of the solution to be measured at a set temperature; and

[0021] A thermometer that is mechanically connected to the water bath and electrically connected to the main control component and used to measure the temperature of the solution to be measured after being temperature-controlled by the water bath.

[0022] Preferably, the hydrogen ion exchange column includes:

[0023] A resin column that is mechanically connected between the inlet pressure limiting component and the constant current control component; and

[0024] Ion exchange resin provided in the resin column.

[0025] Preferably, the component for testing the instrument to be measured includes:

[0026] A resistance tester that is electrically connected to the on-line conductivity meter to be measured and used to output the first test signal.

[0027] Preferably, the main control component includes:

[0028] A PLC controller that is electrically connected to the component for testing the instrument to be measured and the standard conductivity test component and used to receive the first test signal, the second test signal and the test error standard and output a calibration result; and

[0029] A human-machine interaction device electrically connected to the PLC controller, for generating the test error standard based on operations and displaying the verification result.

[0030] Preferably, the inlet water pressure limiting component includes:

[0031] A stop valve, whose water inlet obtains the solution to be measured, and whose water outlet is mechanically connected to the hydrogen ion exchange column to limit the water pressure of the solution input to the hydrogen ion exchange column below a set water pressure.

[0032] Preferably, the constant current control component includes:

[0033] A regulating valve for keeping the flow rate of the solution to be measured at a set flow rate, whose water inlet is mechanically connected to the hydrogen ion exchange column, and whose control end is electrically connected to the main control component; and

[0034] A flow meter mechanically connected to the water outlet of the regulating valve and the constant temperature control component and electrically connected to the main control component, for measuring the flow rate of the output solution of the regulating valve.

[0035] Preferably, the on-line conductivity meter whole machine calibration device for nuclear power plants further includes: a battery component electrically connected to the component to be measured instrument test component, the inlet water pressure limiting component, the constant current control component, the constant temperature control component, the standard conductivity test component and the main control component.

[0036] Implementing the present utility model has the following beneficial effects: providing an on-line conductivity meter whole machine calibration device for nuclear power plants, realizing automatic whole machine calibration of the on-line conductivity meter for nuclear power plants, effectively improving the calibration efficiency and accuracy, and playing a positive role in improving the safety of nuclear power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The following will further illustrate the present utility model in conjunction with the drawings and embodiments. In the drawings:

[0038] Figure 1 is a schematic structural diagram of an on-line conductivity meter whole machine calibration device for nuclear power plants in some embodiments of the present utility model;

[0039] Figure 2 is a schematic structural diagram of a constant temperature control component in some embodiments of the present utility model;

[0040] Figure 3 is a schematic structural diagram of a main control component in some embodiments of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] In order to have a clearer understanding of the technical features, objectives and effects of the present utility model, the specific embodiments of the present utility model will now be described in detail with reference to the drawings.

[0042] In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings and are constructed and operated in a specific orientation. This is only for the convenience of describing the technical solution and does not indicate that the indicated device or element must have a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0043] An embodiment of the present utility model provides an on-line conductivity meter whole-machine calibration device for a nuclear power plant, as Figure 1 shown. The calibration device may include a tested instrument test component 1, an inlet water pressure limiting component 2, a hydrogen ion exchange column 3, a constant current control component 4, a constant temperature control component 5, a standard conductivity test component 6, and a main control component 7.

[0044] The tested instrument test component 1 can be electrically connected to the secondary instrument of the tested on-line conductivity meter to collect the output signal of the tested on-line conductivity meter and output a first test signal that can characterize the output signal according to the output signal. It should be noted that in a nuclear power plant, the existing on-line conductivity meter generally includes a primary instrument and a secondary instrument. The primary instrument corresponds to a test electrode for contacting the tested solution, and the secondary instrument is a device that receives the electrical signal output by the test electrode and outputs an output signal that can characterize the conductivity of the solution according to the electrical signal.

[0045] Since the output signal of the secondary instrument of the tested on-line conductivity meter is usually an analog signal and the main control component 7 cannot directly read it, in some embodiments, the tested instrument test component 1 may include a resistance tester. The resistance tester is electrically connected to the secondary instrument of the tested on-line conductivity meter to output a resistance tester of the first test signal that can represent the conductivity of the tested solution tested by the tested on-line conductivity meter. It should be noted that the output signal of the on-line conductivity meter in a nuclear power plant is usually a resistance signal. Therefore, in this embodiment, the output signal is detected by the resistance tester. Of course, if the output signal of the tested on-line conductivity meter is a current signal or a voltage signal, then the tested instrument test component 1 may include a current tester or a voltage tester, so as to generate a first test signal based on the corresponding output signal.

[0046] The inlet water pressure limiting component 2 can be mechanically connected to the inlet of the ion exchange device where the tested on-line conductivity meter is located to obtain the tested solution before being processed by the ion exchange device where the tested on-line conductivity meter is located, that is, to ensure that the solution entering the calibration device has the same source as the solution entering the inlet of the ion exchange device where the tested on-line conductivity meter is located. In addition, the function of the inlet water pressure limiting component 2 is to limit the water pressure of the solution input to the hydrogen ion exchange column 3.

[0047] When the water pressure of the solution to be measured input to the hydrogen ion exchange column 3 is too high, it may cause the resin in the hydrogen ion exchange column 3 to be disturbed, fluidized, and have low interaction efficiency due to excessive water pressure. Therefore, in some embodiments, such as Figure 1 shown, the inlet water pressure limiting component 2 may include a stop valve. The inlet of the stop valve obtains the solution to be measured, and the outlet of the stop valve is mechanically connected to the hydrogen ion exchange column 3 to limit the water pressure of the solution input to the hydrogen ion exchange column 3 below the set water pressure. In this embodiment, the stop valve can be an existing stop valve, which can close when the flow rate of the solution to be measured input to the hydrogen ion exchange column 3 is greater than its cut-off flow rate, so that the water pressure of the solution input to the hydrogen ion exchange column 3 is limited below the set water pressure. Among them, the set water pressure can be 2 bar. It should be noted that the water pressure that the stop valve can limit can be configured to be consistent with the maximum input water pressure of the hydrogen ion exchange column in the ion exchange device where the on-line conductivity meter to be measured is located.

[0048] Please refer to Figure 1 , the hydrogen ion exchange column 3 is mechanically connected to the inlet water pressure limiting component 2.

[0049] In some embodiments, such as Figure 1 shown, the hydrogen ion exchange column 3 includes a resin column and ion exchange resin. The resin column is mechanically connected between the inlet water pressure limiting component 2 and the constant flow control component 4, and the ion exchange resin is arranged in the resin column to perform ion exchange on the solution to be measured input to the resin column. Among them, the ion exchange resin can be configured to have a regeneration degree consistent with that of the resin in the hydrogen ion exchange column of the ion exchange device where the on-line conductivity meter to be measured is located. It should be noted that the purpose of limiting the water pressure of the input solution of the hydrogen ion exchange column 3 and configuring the ion exchange resin included in the hydrogen ion exchange column 3 to have a regeneration degree consistent with the resin regeneration degree in the hydrogen ion exchange column of the ion exchange device where the on-line conductivity meter to be measured is located is to make the working environment of the hydrogen ion exchange column 3 in the calibration device consistent with the working environment of the hydrogen ion exchange column in the ion exchange device where the on-line conductivity meter to be measured is located, thereby improving the calibration accuracy. In addition, the resin column can be an existing resin column.

[0050] Please refer to Figure 1 , the constant flow control component 4 is mechanically connected to the hydrogen ion exchange column 3 to keep the flow rate of the solution to be measured output from the hydrogen ion exchange column 3 at the set flow rate. Among them, the set flow rate is preferably consistent with the set flow rate of the solution output from the hydrogen ion exchange column in the ion exchange device where the on-line conductivity meter to be measured is located.

[0051] In some embodiments, such as Figure 1As shown in the figure, the constant current control component 4 may include a regulating valve 41 and a flowmeter 42. The water inlet of the regulating valve 41 is mechanically connected to the hydrogen ion exchange column 3, and the control end of the regulating valve 41 is electrically connected to the main control component 7 to control the opening degree of the regulating valve 41 based on the regulating valve control signal output by the main control component 7, so as to keep the flow rate of the measured solution at the set flow rate. Among them, the set flow rate can be 10 L / h. The flowmeter 42 is mechanically connected to the water outlet of the regulating valve 41 and the constant temperature control component 5, and the flowmeter 42 is also electrically connected to the main control component 7 to measure the flow rate of the output solution of the regulating valve 41 and input a measurement signal capable of characterizing the magnitude of the flow rate of the output solution of the regulating valve 41 to the main control component 7, so that the main control component 7 can output the regulating valve control signal according to the flow rate of the output solution of the regulating valve 41. In addition, the regulating valve 41 can be an existing regulating valve. The flowmeter 42 is preferably an existing flowmeter with a measurement range of 0 to 30 L / h and an accuracy of ±0.1%.

[0052] Please refer to Figure 1 , the constant temperature control component 5 is mechanically connected to the constant current control component 4 to keep the temperature of the measured solution output by the constant current control component 4 at the set temperature. Among them, the set temperature is preferably the same as the set temperature of the solution output by the hydrogen ion exchange column in the ion exchange device where the measured on-line conductivity meter is located.

[0053] In some embodiments, as Figure 2 shown, the constant temperature control component 5 may include a water bath 51 and a thermometer 52. The water bath 51 is mechanically connected between the constant current control component 4 and the standard conductivity test component 6, and the water bath 51 is also electrically connected to the main control component 7 to control whether to heat the measured solution according to the temperature control signal output by the main control component 7, so as to keep the temperature of the measured solution at the set temperature. Among them, the set temperature can be 25 °C. The thermometer 52 is mechanically connected to the water bath 51, and the thermometer 52 is also electrically connected to the main control component 7. The thermometer 52 is used to measure the temperature of the measured solution controlled by the water bath 51 and input a measurement signal capable of characterizing the magnitude of the temperature of the measured solution controlled by the water bath 51 to the main control component 7, so that the main control component 7 can output the temperature control signal according to the temperature of the measured solution controlled by the water bath 51. In addition, the thermometer 52 is preferably an existing precision thermometer with a measurement range of 0 °C to 50 °C and a minimum scale value of 0.1 °C.

[0054] Please refer to Figure 1 , the standard conductivity test component 6 is mechanically connected to the constant temperature control component 5, and can test the conductivity of the measured solution and output a second test signal capable of characterizing the magnitude of the conductivity of the measured solution output by the constant temperature control component 5.

[0055] In some embodiments, as Figure 1As shown, the standard conductivity test assembly 6 may include a liquid storage container 61, a conductivity meter 62, and a drain valve 63. The liquid storage container 61 is mechanically connected to the constant temperature control assembly 5 to store the liquid storage container 61 of the solution to be measured output by the constant temperature control assembly 5. Among them, the liquid storage container 61 may be a water storage tank. The primary instrument of the conductivity meter 62 is placed in the liquid storage container 61 to contact the liquid to be measured in the liquid storage container 61, so as to measure the conductivity of the solution to be measured. The secondary instrument of the conductivity meter 62 is electrically connected to the main control assembly 7 to input the second test signal to the main control assembly 7. Among them, the conductivity meter 62 is preferably an existing conductivity meter with a conductivity measurement range of 0.055 to 1000 μs / cm and an accuracy of ±1%, or a conductivity meter with the same model as the on-line conductivity meter to be measured can be used. The drain valve 63 is mechanically connected to the liquid storage container 61, and the drain valve 63 is electrically connected to the main control assembly 7 to discharge the solution to be measured in the liquid storage container 61 based on the control of the main control assembly 7. In addition, the drain valve 63 may be an existing electric valve.

[0056] In some embodiments, as Figure 1 shown, the standard conductivity test assembly 6 further includes a water inlet valve 64. The water inlet of the water inlet valve 64 is mechanically connected to the constant temperature control assembly 5, the water outlet of the water inlet valve 64 is mechanically connected to the liquid storage container 61, and the control end of the water inlet valve 64 is electrically connected to the main control assembly 7 to control the water inlet of the liquid storage container 61 based on the control of the main control assembly 7. In addition, the water inlet valve 64 may be an existing electric valve.

[0057] Please refer to Figure 1 , the main control assembly 7 is electrically connected to the instrument under test test assembly 1 and the standard conductivity test assembly 6 to receive the first test signal and the second test signal, and output a calibration result according to the first test signal and the second test signal, so that the staff can determine whether the on-line conductivity meter to be measured meets the corresponding usage requirements through the calibration result.

[0058] In some embodiments, as Figure 3As shown in the figure, the main control component 7 may include a PLC controller 71 and a human-machine interaction device 72. The PLC controller 71 is electrically connected to the instrument under test test component 1 and the standard conductivity test component 6 to receive the first test signal, the second test signal and the test error standard, and then output a calibration result according to the first test signal, the second test signal and the test error standard. The human-machine interaction device 72 is electrically connected to the PLC controller 71 to generate a test error standard based on the operation of the staff and display the calibration result. Among them, the calibration result includes the comparison result of the output signal errors of the on-line conductivity meter and the conductivity meter under test, etc. In addition, the human-machine interaction device 72 is preferably a touch screen. Specifically, the test error standard may include the secondary instrument reference error standard and the secondary instrument temperature compensation additional error standard input by the staff, and the first test signal and the second test signal can respectively represent the conductivity of the homologous solution under test after hydrogen ion exchange measured by the on-line conductivity meter under test and the standard conductivity test component 6. Therefore, the PLC controller 71 can calculate the secondary instrument reference error and the secondary instrument temperature compensation additional error of the two based on the first test signal and the second test signal by using the existing algorithm, and determine whether the on-line conductivity meter under test meets the usage requirements by comparing with the test error standard.

[0059] Further, please refer to Figure 3 , the PLC controller 71 is electrically connected to a resistance tester, a regulating valve 41, a flow meter 42, a water bath 51, a thermometer 52, a conductivity meter 62, a drain valve 63 and a water inlet valve 64 to obtain relevant test signals and send control signals to relevant devices, so as to implement the calibration work described above.

[0060] In some embodiments, as Figure 1 shown, the on-line conductivity meter whole machine calibration device of the nuclear power plant further includes a battery assembly 8. The battery assembly 8 is electrically connected to the instrument under test test component 1, the inlet water pressure limiting component 2, the constant current control component 4, the constant temperature control component 5, the standard conductivity test component 6 and the main control component 7 to supply power to the instrument under test test component 1, the inlet water pressure limiting component 2, the constant current control component 4, the constant temperature control component 5, the standard conductivity test component 6 and the main control component 7. Since the working voltages of some components are inconsistent, correspondingly, the battery assembly 8 may be composed of a battery cluster and several power modules, and the several power modules may be existing power modules or switching power supply circuits, and their function is to convert the voltage output by the battery cluster into multiple different voltage values to supply power to components with different working voltages.

[0061] Understandably, the technical solution of the present utility model collects the output signal of the on-line conductivity meter to be measured through the meter to be measured test component and outputs the first test signal. Then, the inlet water pressure limiting component, hydrogen ion exchange column, constant current control component, constant temperature control component and main control component cooperate with each other to simulate the working environment of the ion exchange equipment where the on-line conductivity meter to be measured is located, and test the solution to be measured that is homologous to the solution measured by the meter to be measured test component, so as to obtain the second test signal. Finally, the main control component outputs a calibration result based on the first test signal and the second test signal, realizing the automatic whole-machine calibration of the on-line conductivity meter in the nuclear power plant, effectively improving the calibration efficiency and accuracy, and playing a positive role in improving the safety of the nuclear power plant.

[0062] Understandably, the above embodiments only express the preferred embodiments of the present utility model, and its description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present utility model; therefore, all equivalent transformations and modifications made to the scope of the claims of the present utility model shall fall within the scope covered by the claims of the present utility model.

Claims

1. An on-line conductivity meter complete machine calibration device for nuclear power plants, characterized in that, Including: A tested instrument test component (1) for electrically connecting with an on-line conductivity meter to be tested, collecting the output signal of the on-line conductivity meter to be tested and outputting a first test signal; An inlet pressure limiting component (2) for obtaining the inlet pressure of the solution to be tested; A hydrogen ion exchange column (3) mechanically connected to the inlet pressure limiting component (2); A constant current control component (4) mechanically connected to the hydrogen ion exchange column (3); A constant temperature control component (5) mechanically connected to the constant current control component (4); A standard conductivity test component (6) mechanically connected to the constant temperature control component (5) for testing the solution to be tested and outputting a second test signal; and A main control component (7) electrically connected to the tested instrument test component (1) and the standard conductivity test component (6), for receiving the first test signal and the second test signal and outputting a calibration result.

2. The on-line conductivity meter complete machine calibration device for nuclear power plants according to claim 1, wherein, The standard conductivity test component (6) includes: A liquid storage container (61) mechanically connected to the constant temperature control component (5) for storing the solution to be tested; A conductivity meter (62), the primary instrument of which is placed in the liquid storage container (61) to test the solution to be tested, and the secondary instrument of which is electrically connected to the main control component (7) to input the second test signal thereto; and A drain valve (63) mechanically connected to the liquid storage container (61) and electrically connected to the main control component (7) for discharging the solution to be tested in the liquid storage container (61).

3. The on-line conductivity meter complete machine calibration device for nuclear power plants according to claim 2, characterized in that, The standard conductivity test component (6) further includes: An inlet valve (64) for controlling the inlet of the liquid storage container (61), the inlet of which is mechanically connected to the constant temperature control component (5), the outlet of which is mechanically connected to the liquid storage container (61), and the control end of which is electrically connected to the main control component (7).

4. The on-line conductivity meter complete machine calibration device for nuclear power plants according to claim 1, characterized in that, The constant temperature control component (5) includes: A water bath (51) mechanically connected to the constant current control component (4) and the standard conductivity test component (6) and electrically connected to the main control component (7) for keeping the temperature of the solution to be tested at a set temperature; and A thermometer (52) mechanically connected to the water bath (51) and electrically connected to the main control component (7) for measuring the temperature of the solution to be tested controlled by the water bath (51).

5. The on-line conductivity meter complete machine calibration device for nuclear power plants according to claim 1, characterized in that, The hydrogen ion exchange column (3) includes: A resin column mechanically connected between the inlet pressure limiting component (2) and the constant current control component (4); and Ion exchange resin provided in the resin column.

6. The on-line conductivity meter whole-machine calibration device for nuclear power plants according to claim 1, characterized in that, The tested instrument test component (1) includes: A resistance tester electrically connected to the on-line conductivity meter to be tested for outputting the first test signal.

7. The on-line conductivity meter complete machine calibration device for nuclear power plants according to claim 1, characterized in that, The main control component (7) includes: A PLC controller (71) electrically connected to the tested instrument test component (1) and the standard conductivity test component (6) for receiving the first test signal, the second test signal and a test error standard and outputting a calibration result; and A human-machine interaction device (72) electrically connected to the PLC controller (71) for generating the test error standard based on an operation and displaying the calibration result.

8. The on-line conductivity meter complete machine calibration device for nuclear power plants according to claim 1, characterized in that, The inlet pressure limiting component (2) includes: A stop valve, whose inlet obtains the solution to be measured, and whose outlet is mechanically connected to the hydrogen ion exchange column (3) to limit the water pressure of the solution input to the hydrogen ion exchange column (3) below a set water pressure.

9. The on-line conductivity meter whole-machine calibration device for nuclear power plants according to claim 1, characterized in that, The constant flow control component (4) includes: A regulating valve (41) for keeping the flow rate of the solution to be measured at a set flow rate, whose inlet is mechanically connected to the hydrogen ion exchange column (3), and whose control end is electrically connected to the main control component (7); and A flowmeter (42) that is mechanically connected to the outlet of the regulating valve (41) and the constant temperature control component (5) and is electrically connected to the main control component (7) for measuring the flow rate of the output solution of the regulating valve (41).

10. The on-line conductivity meter complete machine calibration device for nuclear power plants according to any one of claims 1 to 9, characterized in that, It further includes: A battery component (8) that is electrically connected to the component under test (1), the inlet pressure limiting component (2), the constant flow control component (4), the constant temperature control component (5), the standard conductivity test component (6), and the main control component (7).

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