Temperature transmitter monitoring and calibrating device

Abstract

The utility model discloses a temperature transmitter monitoring and calibrating device, which belongs to the field of natural gas metering and comprises a temperature sleeve, a temperature standard device and a data acquisition component. The temperature sleeve is provided with an access end, the access end is detachably connected with the to-be-measured pipe body, and when the access end is connected with the to-be-measured pipe body, the temperature sleeve is communicated with the to-be-measured pipe body; the temperature standard device is arranged in the temperature sleeve and used for measuring the real-time temperature in the temperature sleeve and recording the real-time temperature as a second temperature value; the data acquisition assembly is connected with the temperature standard device and the temperature transmitter and used for acquiring the first temperature value and the second temperature value and judging the detection state of the temperature transmitter based on the first temperature value and the second temperature value, and the detection state is qualified or unqualified. According to the temperature transmitter monitoring and calibrating device, through cooperation of the temperature sleeve, the temperature standard device and the data acquisition assembly, measurement deviation caused by environment difference is reduced, and the accuracy of monitoring and calibrating is improved; and complicated disassembly and transportation operation is not needed, and the measurement efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas measurement field especially relates to a temperature transmitter monitoring and calibration device. BACKGROUND

[0002] Natural gas is a kind of clean, efficient energy, is widely used in industrial production and daily life of residents, and its use is huge and continues to grow.Accurate measurement of natural gas flow is important for energy trade settlement, production process control and energy rational allocation.To ensure the accuracy and consistency of natural gas flow measurement, natural gas flow must be traced.

[0003] The conventional natural gas flow value traceability mainly uses mass time method standard device.In measurement, natural gas is controlled to flow stably through a specific pipeline or cavity structure, and the measuring equipment monitors and records the mass of natural gas passing through in a set time, and obtains the time interval experienced by the natural gas mass flow through time measurement.Then, the natural gas flow standard value is calculated according to the flow calculation formula.

[0004] Since temperature is one of the important parameters affecting natural gas flow, the temperature of natural gas needs to be accurately measured by temperature transmitter in the measurement process of natural gas flow, and the measurement result is used for temperature compensation of flow data to ensure the accuracy of natural gas flow measurement under different temperature conditions, and thus ensure the accuracy of value transmission.

[0005] However, the measurement accuracy of temperature transmitter may deviate during long-term use.If this deviation is not corrected in time, it will directly lead to deviation of value transmission result, affecting the accuracy of natural gas flow measurement.To ensure the accuracy of temperature transmitter measurement, it needs to be detected and calibrated regularly, and the temperature transmitter should also be checked and calibrated before each use of related measurement equipment for natural gas flow test to avoid the influence of out-of-tolerance phenomenon on measurement results.

[0006] In the prior art, the calibration of temperature transmitter can only be disassembled from the use site and sent to the laboratory for comparison with the standard under the same temperature field.This calibration method not only increases the labor cost and time cost due to frequent disassembly of temperature transmitter, but also causes damage to the temperature transmitter itself and related connecting parts, shortening its service life;In addition, the disassembly and inspection process may introduce additional errors, affecting the accuracy of calibration, and also reducing the efficiency of natural gas flow measurement, which cannot meet the real-time, efficient and accurate measurement requirements. UTILITY MODEL CONTENTS

[0007] The utility model discloses a temperature transmitter monitoring and calibration device, to solve the technical problem of low efficiency and high cost in prior art temperature transmitter monitoring and calibration process.

[0008] As conceived above, the technical scheme adopted by the utility model is:

[0009] A temperature transmitter monitoring and calibration device is applied to a to-be-measured pipe body, the to-be-measured pipe body is configured with a temperature transmitter, the temperature transmitter is used to measure the real-time temperature in the to-be-measured pipe body and is recorded as a first temperature value, and the temperature transmitter monitoring and calibration device comprises:

[0010] A temperature sleeve has an access end, the access end is detachably connected with the to-be-measured pipe body, when the access end is connected with the to-be-measured pipe body, the temperature sleeve is in communication with the to-be-measured pipe body;

[0011] A temperature standard device is arranged in the temperature sleeve and is used to measure the real-time temperature in the temperature sleeve and is recorded as a second temperature value;

[0012] A data acquisition assembly is connected with the temperature standard device and the temperature transmitter, is used to acquire the first temperature value and the second temperature value, and judges the detection state of the temperature transmitter based on the first temperature value and the second temperature value, and the detection state is qualified or unqualified.

[0013] As a preferred, the temperature sleeve comprises a main body and a connecting head, the main body is connected with the connecting head, the main body is used to connect the temperature standard device, and the connecting head has the access end.

[0014] As a preferred, the same main body is configured with a plurality of connecting heads, and the sizes of different connecting heads are different.

[0015] As a preferred, a plurality of temperature sleeves are arranged, and the sizes of the connecting heads of different temperature sleeves are different.

[0016] As a preferred, a heat-conducting medium is arranged in the temperature sleeve.

[0017] As a preferred, the heat-conducting medium is heat-conducting silicon oil.

[0018] As a preferred, the temperature standard device is a two-grade platinum resistance thermometer.

[0019] As a preferred, a sealing element is arranged at the connecting position of the temperature sleeve and the to-be-measured pipe body.

[0020] Preferably, the data acquisition component includes a receiver and a processor. The receiver is used to receive the first temperature value and the second temperature value. The processor is signal-connected to the receiver and is used to calculate the absolute value of the difference between the first temperature value and the second temperature value, and to determine the magnitude of the absolute value and a preset difference. If the absolute value is greater than or equal to the preset difference, the detection state is unqualified; if the absolute value is less than the preset difference, the detection state is qualified.

[0021] Preferably, the temperature transmitter monitoring and calibration device further includes an alarm, which is signal-connected to the data acquisition component. When the detection status is unqualified, the alarm issues an alarm response.

[0022] The beneficial effects of this utility model are:

[0023] The temperature transmitter monitoring and calibration device proposed in this invention features a detachable connection structure between the temperature sleeve and the pipe under test, allowing for rapid connection and communication between the device and the pipe without disassembling the temperature transmitter. The temperature standard is built into the temperature sleeve, with its measuring end in direct contact with the internal medium of the pipe, creating heat exchange conditions identical to those of the temperature transmitter. This ensures that the temperature data acquired by both devices are based on the same temperature field, guaranteeing the consistency and validity of the collected data. The data acquisition component synchronously acquires the first temperature value from the temperature transmitter and the second temperature value from the temperature standard. By comparing and analyzing the deviation between the two measurement results in real time, it automatically determines the operating status of the temperature transmitter, enabling the monitoring and calibration process to be completed on-site. This temperature transmitter monitoring and calibration device utilizes the interconnected structure of the temperature sleeve to place the temperature standard and the temperature transmitter in the same temperature field, ensuring high consistency of the measurement environment. This reduces measurement deviations caused by environmental differences and improves the accuracy of monitoring and calibration. On the other hand, the entire process eliminates the need for complex disassembly and transportation operations, saving measurement time, improving measurement efficiency, meeting real-time measurement requirements, and avoiding damage to the temperature transmitter and connecting components from frequent disassembly. This reduces equipment wear and tear, minimizes manpower input, and effectively lowers costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the temperature transmitter monitoring and calibration device provided in this embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the tube to be tested provided in an embodiment of this utility model.

[0026] In the picture:

[0027] 100. Test tube body; 1. Temperature sleeve; 10. Connection end; 11. Main body; 12. Connector; 2. Temperature standard; 3. Data acquisition component. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] This utility model embodiment provides a temperature transmitter monitoring and calibration device, which is applied to a tube body under test. The tube body under test is equipped with a temperature transmitter, which is used to measure the real-time temperature inside the tube body and record it as a first temperature value.

[0034] See Figure 1 and Figure 2The temperature transmitter monitoring and calibration device provided in this embodiment includes a temperature sleeve 1, a temperature standard 2, and a data acquisition component 3. The temperature sleeve 1 has an access end 10, which is detachably connected to the tube body 100 under test. When the access end 10 is connected to the tube body 100, the temperature sleeve 1 is in communication with the tube body 100. The temperature standard 2 is disposed inside the temperature sleeve 1 and is used to measure the real-time temperature inside the temperature sleeve 1, which is recorded as a second temperature value. The data acquisition component 3 is connected to the temperature standard 2 and the temperature transmitter, and is used to acquire a first temperature value and a second temperature value, and to determine the detection status of the temperature transmitter based on the first and second temperature values, indicating whether the detection status is qualified or unqualified.

[0035] The temperature transmitter monitoring and calibration device proposed in this invention utilizes a detachable connection structure between the temperature sleeve 1 and the test tube 100, allowing the monitoring and calibration device to be quickly connected and communicated with the test tube 100 without disassembling the temperature transmitter. The temperature standard 2 is built into the temperature sleeve 1, with its measuring end in direct contact with the internal medium of the test tube 100, forming heat exchange conditions completely consistent with the environment of the temperature transmitter. This ensures that the temperature data collected by both devices are based on the same temperature field, guaranteeing the consistency and validity of the collected data. The data acquisition component 3 synchronously acquires the first temperature value of the temperature transmitter and the second temperature value of the temperature standard 2, and automatically determines the operating status of the temperature transmitter by comparing and analyzing the deviation between the two measurement results in real time. The monitoring and calibration process can be completed on-site. This temperature transmitter monitoring and calibration device utilizes the interconnecting structure of the temperature sleeve 1 to place the temperature standard 2 and the temperature transmitter in the same temperature field, ensuring high consistency of the measurement environment, reducing measurement deviations caused by environmental differences, and improving the accuracy of monitoring and calibration. On the other hand, the entire process eliminates the need for complex disassembly and transportation operations, saving measurement time, improving measurement efficiency, meeting real-time measurement requirements, and avoiding damage to the temperature transmitter and connecting components from frequent disassembly, thus reducing equipment wear and tear, minimizing manpower input, and effectively reducing costs.

[0036] The specific structure of the temperature transmitter monitoring and calibration device is described below.

[0037] Temperature sleeve 1 is connected to the tube body 100 under test via access end 10, thereby providing the same temperature field for the temperature standard 2 located inside it and the temperature transmitter located inside the tube body 100 under test, so as to facilitate monitoring and calibration operations.

[0038] Specifically, the temperature sleeve 1 includes a body 11 and a connector 12, which are connected. The body 11 is used to connect the temperature standard 2, and the connector 12 has an access end 10.

[0039] Since the interface positions and sizes of different test tubes 100 vary, multiple connectors 12 are configured on the same main body 11 to improve the adaptability of the temperature sleeve 1. These connectors 12 have different sizes, allowing operators to flexibly select the appropriate connector 12 based on the actual size of the interface of the test tube 100, ensuring a tight and secure connection between the access end 10 and the test tube 100. Because one temperature sleeve 1 is equipped with multiple connectors 12, operators do not need to carry multiple temperature sleeves 1 of different specifications when dealing with test tubes 100 with different interface sizes; they only need to carry one temperature sleeve 1 and its matching multiple connectors 12, improving portability.

[0040] In addition, multiple temperature sleeves 1 can be provided, with different sizes of connectors 12 for each temperature sleeve 1. Thus, when the staff needs to perform temperature transmitter calibration on the test tube 100 with different sized interfaces, there is no need to temporarily change the connectors 12. The temperature sleeve 1 with the appropriate size connector 12 can be directly selected, and each temperature sleeve 1 can be stored and carried independently.

[0041] The dimensions of connector 12 are the length and inner diameter of the connector, and their specific parameters are not limited here.

[0042] Preferably, the inner diameter of the connector 12 gradually decreases from the main body 11 to the access end 10. On the one hand, the smaller inner diameter of the connector 12 results in a smaller diameter of the access end 10, which facilitates alignment with the interface of the tube body 100 under test, providing convenience for installation. On the other hand, the gradually decreasing inner diameter design helps to create a tapered fit when the connector 12 is connected to the tube body 100 under test, better adapting to working environments under different pressures, enhancing connection stability, and reducing the possibility of connection loosening due to pressure fluctuations.

[0043] Furthermore, a seal is provided at the connection between the temperature sleeve 1 and the tube body 100 under test to maintain the stability of the temperature measurement environment. This ensures that the environment inside the temperature sleeve 1 is closely related to and stable with the internal environment of the tube body 100 under test, so that the second temperature value measured by the temperature standard 2 truly reflects the temperature situation inside the tube body 100 under test.

[0044] Specifically, the sealing element can be a rubber sealing ring, a metal sealing gasket, or a graphite sealing sheet, etc., and there are no restrictions here.

[0045] To improve the temperature consistency between the test tube 100 and the temperature sleeve 1, resulting in more accurate temperature measurements, a heat-conducting medium is installed inside the temperature sleeve 1. This medium accelerates heat transfer, allowing the temperature inside the test tube 100 to be transferred more quickly and efficiently to the temperature standard 2 within the temperature sleeve 1. This enables the temperature standard 2 to respond more rapidly to temperature changes in the test tube 100, reducing measurement lag. Simultaneously, the heat-conducting medium promotes a more uniform temperature distribution, effectively eliminating potential localized temperature differences between the temperature sleeve 1 and the test tube 100. This prevents measurement errors in the temperature standard 2 due to temperature inhomogeneity, ensuring temperature consistency between the temperature sleeve 1 and the test tube 100.

[0046] In this embodiment, the heat-conducting medium is thermally conductive silicone oil. Thermally conductive silicone oil has excellent thermal conductivity, enabling it to efficiently transfer heat from the test tube 100 to the temperature sleeve. Furthermore, thermally conductive silicone oil is relatively inert chemically, non-corrosive to the temperature sleeve 1 and the test tube 100, making it highly practical.

[0047] In other embodiments, the thermally conductive medium may also be liquid metal, high thermal conductivity gel, or thermally conductive ceramic particles, etc. There are no limitations on its specific implementation form and materials, as long as the above-mentioned effects can be achieved.

[0048] Temperature standard 2 is used to measure the real-time temperature inside temperature sleeve 1. In this embodiment, temperature standard 2 is a second-order platinum resistance thermometer. Second-order platinum resistance thermometers have high accuracy; their resistance value exhibits a stable and precise linear relationship with temperature changes. They can accurately measure the real-time temperature inside temperature sleeve 1, providing high-precision reference data for the calibration of the temperature transmitter. This makes the judgment of the temperature transmitter's detection status based on the first and second temperature values ​​more accurate, effectively ensuring the reliability of the calibration results.

[0049] In other embodiments, the temperature standard 2 may also be a thermocouple, an infrared temperature sensor, or a thermistor temperature sensor, etc., which is not limited here.

[0050] The data acquisition component 3 is used to receive and analyze measurement data from the temperature standard 2 and the temperature transmitter, and to determine the detection status of the temperature transmitter based on the measurement data.

[0051] Specifically, the data acquisition component 3 includes a receiver and a processor. The receiver is used to receive a first temperature value and a second temperature value. The processor is signal-connected to the receiver and is used to calculate the absolute value of the difference between the first temperature value and the second temperature value, and to determine the magnitude of the absolute value and the preset difference. If the absolute value is greater than or equal to the preset difference, the detection status is unqualified; if the absolute value is less than the preset difference, the detection status is qualified.

[0052] Specifically, the receiver includes a wireless receiving module that can stably and accurately receive the first temperature value from the temperature transmitter and the second temperature value from the temperature standard 2. Both the temperature transmitter and the temperature standard 2 are integrated with a wireless transmitting unit inside, which sends the measured temperature value in the form of a wireless signal. The wireless receiving module can receive these signals within a certain range.

[0053] The arithmetic unit is signal-connected to the receiver through a high-speed data bus. The arithmetic unit pre-stores a preset difference, which is comprehensively determined according to factors such as the accuracy requirements of the temperature transmitter and the actual application scenario. For example, the preset difference is set to 1°C. When the arithmetic unit receives the first temperature value and the second temperature value transmitted by the receiver, it quickly calculates the absolute value of the difference between the two. For example, if the first temperature value is 25.3°C and the second temperature value is 25.8°C, the arithmetic unit calculates the absolute value of the difference between the two as 0.5°C. Then, the arithmetic unit compares and judges the calculated absolute value with the preset difference. In this example, the calculated absolute value is smaller than the preset difference. If it is set that the detection status is qualified when the absolute value is less than or equal to the preset difference, then the detection status of the temperature transmitter is qualified at this time; if the calculated absolute value is greater than or equal to the preset difference, such as the first temperature value is 25.3°C and the second temperature value is 26.4°C, and the calculated absolute value of 1.1°C is greater than the preset difference of 1°C, then the detection status of the temperature transmitter is unqualified.

[0054] Furthermore, the temperature transmitter monitoring and calibration device further includes an alarm, which is signal-connected to the data acquisition component 3. When the detection status is unqualified, the alarm issues an alarm response. The alarm is Bluetooth wirelessly connected to the data acquisition component 3. When the arithmetic unit in the data acquisition component 3 determines that the detection status of the temperature transmitter is unqualified, that is, the absolute value of the difference between the first temperature value and the second temperature value calculated is greater than or equal to the preset difference, it will immediately send an alarm signal to the alarm. After receiving the alarm signal, the alarm emits a sound alarm and simultaneously flashes an indicator light to facilitate reminding the operator to perform subsequent operations.

[0055] Even further, the temperature transmitter monitoring and calibration device further includes a calibrator for calibrating the temperature transmitter. Specifically, the calibrator can be electrically connected to the temperature transmitter. When the data acquisition component 3 determines that the detection status of the temperature transmitter is unqualified, the calibrator finely adjusts the measurement parameters of the temperature transmitter. After adjustment, the difference between the first temperature value and the second temperature value is judged again through the data acquisition component 3 until the detection status is qualified.

[0056] It should be noted that the specific implementation principles of the receiver, arithmetic unit, alarm, and calibrator involved in this invention are conventional technical means that can be understood and implemented by those skilled in the art. The core innovation of this invention lies in the coordinated operation of the temperature sleeve 1 with the aforementioned data acquisition component 3, alarm, and calibrator to achieve the technical effect of monitoring and calibrating the temperature transmitter. Therefore, the underlying operational details of the receiver, arithmetic unit, alarm, and calibrator, and other conventional technical aspects, will not be elaborated upon here.

[0057] The following describes the specific usage process of the temperature transmitter monitoring and calibration device provided in this embodiment.

[0058] Based on the size of the pressure gauge inlet of the tube body 100 to be tested, select a temperature sleeve 1 that is compatible with the connector 12 to ensure that the temperature sleeve 1 is tightly and securely connected to the pressure gauge inlet of the tube body 100 to be tested through the access end 10.

[0059] Afterwards, the valves before and after the tube body 100 to be tested are closed to isolate the device from other parts, creating a relatively stable environment for calibration and monitoring, and avoiding interference from external factors on temperature measurement.

[0060] After installation, add thermally conductive silicone oil into the temperature sleeve 1 as a heat transfer medium. Insert a second-order platinum resistance thermometer as a temperature standard 2 into the temperature sleeve 1, and connect the second-order platinum resistance thermometer to the data acquisition component 3.

[0061] After completing the above operations, wait overnight to allow the entire temperature field to reach equilibrium. Once equilibrium is reached, data acquisition begins. Temperature standard 2 measures the real-time temperature inside temperature sleeve 1 and records it as the second temperature value. The temperature transmitter measures the real-time temperature inside the test tube 100 and records it as the first temperature value. The arithmetic unit of data acquisition component 3 pre-stores a preset difference value determined according to the accuracy requirements of the temperature transmitter and the actual application scenario. The arithmetic unit receives the first and second temperature values ​​from the receiver, calculates the absolute value of the difference between the two, and compares it with the preset difference value. If the absolute value is greater than or equal to the preset difference value, the temperature transmitter's detection status is determined to be unqualified; if the absolute value is less than or equal to the preset difference value, the detection status is determined to be qualified, thereby realizing online calibration and monitoring of the temperature transmitter.

[0062] If the test result is unqualified, the alarm connected to the data acquisition component 3 will issue an alarm response, such as emitting an audible alarm and flashing an indicator light to remind the operator. At the same time, the calibrator will fine-tune the measurement parameters of the temperature transmitter, and after adjustment, it will again judge the difference between the first and second temperature values ​​through the data acquisition component 3 until the test result is qualified.

[0063] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A temperature transmitter monitoring and calibration device, applied to a test tube (100), wherein the test tube (100) is equipped with a temperature transmitter, the temperature transmitter being used to measure the real-time temperature inside the test tube (100) and record it as a first temperature value, characterized in that, The temperature transmitter monitoring and calibration device includes: Temperature sleeve (1) has an access end (10) which is detachably connected to the tube body (100) to be tested. When the access end (10) is connected to the tube body (100) to be tested, the temperature sleeve (1) is connected to the tube body (100) to be tested. A temperature standard (2) is installed inside the temperature sleeve (1) to measure the real-time temperature inside the temperature sleeve (1) and record it as the second temperature value. The data acquisition component (3) is connected to the temperature standard (2) and the temperature transmitter, and is used to acquire the first temperature value and the second temperature value, and to determine the detection status of the temperature transmitter based on the first temperature value and the second temperature value, wherein the detection status is qualified or unqualified.

2. The temperature transmitter monitoring and calibration device according to claim 1, characterized in that, The temperature sleeve (1) includes a body (11) and a connector (12), the body (11) and the connector (12) are connected, the body (11) is used to connect a temperature standard (2), and the connector (12) has the access end (10).

3. The temperature transmitter monitoring and calibration device according to claim 2, characterized in that, The same body (11) is provided with multiple connectors (12), and the different connectors (12) have different sizes.

4. The temperature transmitter monitoring and calibration device according to claim 2, characterized in that, Multiple temperature sleeves (1) are provided, and the size of the connector (12) of each temperature sleeve (1) is different.

5. The temperature transmitter monitoring and calibration device according to claim 1, characterized in that, The temperature sleeve (1) is provided with a heat-conducting medium.

6. The temperature transmitter monitoring and calibration device according to claim 5, characterized in that, The thermally conductive medium is thermally conductive silicone oil.

7. The temperature transmitter monitoring and calibration device according to claim 1, characterized in that, The temperature standard (2) is a second-class platinum resistance thermometer.

8. The temperature transmitter monitoring and calibration device according to claim 1, characterized in that, A sealing element is provided at the connection between the temperature sleeve (1) and the tube body to be tested (100).

9. The temperature transmitter monitoring and calibration device according to claim 1, characterized in that, The data acquisition component (3) includes a receiver and a processor. The receiver is used to receive the first temperature value and the second temperature value. The processor is signal-connected to the receiver and is used to calculate the absolute value of the difference between the first temperature value and the second temperature value, and to determine the magnitude of the absolute value and a preset difference. If the absolute value is greater than or equal to the preset difference, the detection state is unqualified; if the absolute value is less than the preset difference, the detection state is qualified.

10. The temperature transmitter monitoring and calibration device according to claim 9, characterized in that, The temperature transmitter monitoring and calibration device also includes an alarm, which is connected to the data acquisition component (3) via a signal. When the detection status is unqualified, the alarm will issue an alarm response.

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