A portable temperature controller calibrator

Abstract

The application discloses a portable temperature controller calibrator, which comprises a main box, a liquid crystal display, a wiring terminal area, a constant temperature field module, a measurement and detection module, a data processing and control module and a storage module. The main box is in a cylindrical structure. The liquid crystal display is arranged on an inclined slope. A groove cover is rotatably connected to the rear position of the upper surface of the main box. The wiring terminal area is located on the front surface of the main box. The constant temperature field module is located at the upper position in the main box. The space after the groove cover is opened is the constant temperature field. The measurement and detection module, the data processing and control module and the storage module are located at the lower position in the main box. The calibrator can quickly and accurately calibrate the transformer temperature controller on site. The constant temperature tank of the calibrator adopts a structure of dry body and liquid tank, which can calibrate two different types of temperature controllers, i.e. the oil surface temperature controller and the winding temperature controller, and is suitable for a wide range of transformer temperature controllers.

Description

Technical Field

[0001] This invention relates to the field of transformer temperature controller calibration technology, and in particular to a portable temperature controller calibrator. Background Technology

[0002] As a core piece of equipment in the power system, the transformer's operating status directly affects the safety and stability of the power grid. The transformer temperature controller is a crucial non-electrical protection device for the transformer. During transformer operation, temperature change is one of the important parameters reflecting its internal operating conditions, and the accuracy of the temperature controller, as the core device for monitoring and regulating transformer temperature, is vital to ensuring the stable operation of the transformer. To ensure the safe operation of power transformers, the power system needs to regularly inspect various temperature controllers installed on the transformers to avoid transformer cooling system failures caused by malfunctions in the temperature control contacts and readings, which could affect the safe operation of the transformer. In practical use, temperature controller calibration becomes particularly important, and achieving temperature controller calibration requires providing a stable, convenient, and suitable constant temperature environment for on-site use.

[0003] However, current temperature controller calibration still faces many challenges. Traditional calibration methods mainly rely on manual operation, which consumes a lot of time and manpower. Furthermore, the calibration process suffers from inaccurate data collection and highly subjective result interpretation. In addition, traditional calibration methods usually require disassembling the temperature controller and transporting it to a specialized laboratory for calibration. This disassembly and transportation process is not only complex but also time-consuming, resulting in a time lag and making it difficult for traditional calibration methods to meet actual field requirements.

[0004] On the other hand, the disassembly process of transformer temperature controllers is not only labor-intensive, but also prone to safety hazards such as incorrect secondary wiring during disassembly, further complicating the verification process for faulty temperature controllers. Simultaneously, with the development of smart grids, higher demands are placed on the accuracy and efficiency of temperature controller verification. Therefore, a dedicated portable device is needed that can perform verification directly at the substation site without disassembling the temperature controller's secondary wiring. Currently, how to improve the efficiency and accuracy of temperature controller verification through technological innovation has become an important research topic. Summary of the Invention

[0005] To overcome the above problems, the purpose of this invention is to provide a portable temperature controller calibrator. This calibrator can quickly and accurately calibrate transformer temperature controllers at substation sites. Furthermore, the calibrator's constant temperature bath adopts a dual-purpose structure for both dry and liquid baths, enabling the calibration of two different types of temperature controllers: oil surface temperature controllers and winding temperature controllers. It is applicable to a wide range of transformer temperature controllers. The calibrator features an integrated design, making it easy to carry and solving the problem of disassembly and transportation required in traditional methods. This greatly improves the efficiency of transformer temperature controller calibration, avoids safety hazards caused by secondary wiring errors, and ensures the efficient and accurate completion of the overall calibration work.

[0006] The technical solution adopted in this invention is:

[0007] A portable temperature controller calibrator includes a main unit housing, an LCD screen, a terminal block area, a constant temperature field module, a measurement and detection module, a data processing and control module, and a storage module. The main unit housing has a near-cylindrical structure with a sloping design on the front side of its upper surface. The LCD screen is mounted on the sloping surface. A slotted cover is rotatably connected to the rear side of the upper surface of the main unit housing. The terminal block area is located on the front surface of the main unit housing. The constant temperature field module is located inside the upper part of the main unit housing, and the space after the slotted cover is opened is the constant temperature field. The measurement and detection module, the data processing and control module, and the storage module are located inside the lower part of the main unit housing, i.e., below the constant temperature field module.

[0008] As a further description of the present invention, the constant temperature field module consists of a dual-drive heating and temperature control device, a constant temperature bath, and a temperature sensor. The bath cover is rotatably connected to the upper part of the constant temperature bath. The dual-drive heating and temperature control device is located below the constant temperature bath. The temperature sensor is located in the middle of the constant temperature bath. The dual-drive heating and temperature control device and the temperature sensor are connected to the data processing and control module.

[0009] As a further description of the present invention, the constant temperature bath is a dual-purpose structure for both dry and liquid baths.

[0010] As a further description of the present invention, the measurement and detection module includes an indication signal acquisition circuit, a contact action detection circuit, and a transmitter signal acquisition circuit. The measurement and detection module is connected to the terminal block area and the data processing and control module.

[0011] As a further description of the present invention, the terminal block area includes a voltage detection socket, a current detection socket, a resistance temperature detector (RTD) socket, a temperature switch detection socket, an external standard platinum resistance thermometer (PTT) interface, a USB data interface, and a power supply and switch. The voltage detection socket, current detection socket, and RTD socket have the same appearance and structure, and are located at the top of the front surface. There are two RTD sockets, and one voltage detection socket and one current detection socket. The temperature switch detection socket and the external standard PTD interface are located in the middle of the front surface. The USB data port is located below the temperature switch detection socket and the external standard PTD interface. There are two USB data ports. The power supply and switch are located below the USB data ports.

[0012] As a further description of the present invention, the inner wall of the constant temperature bath is marked with a liquid level line, and a magnetic rotor and a liquid tank sleeve are provided inside the constant temperature bath. The magnetic rotor is located below the constant temperature bath, one end of the liquid tank sleeve is connected to the rotation shaft of the magnetic rotor and rotates with the rotation of the magnetic rotor, and the other end of the liquid tank sleeve is connected to the tank cover.

[0013] As a further description of the present invention, a handle is provided in the middle of the upper surface of the main unit housing, and heat dissipation vents are provided at the edge of the groove cover at the rear of the upper surface of the main unit housing and at both sides of the constant temperature groove of the main unit housing. The heat dissipation vents at the edge of the groove cover are configured as a grid shape, and the heat dissipation vents at both sides of the constant temperature groove are configured as fan-shaped heat dissipation vents.

[0014] As a further description of the present invention, a foot pad is provided at the bottom of the main unit housing.

[0015] As a further description of the present invention, the constant temperature bath is a large-diameter bath with a diameter of 60 mm.

[0016] As a further description of the present invention, the main unit housing is made of all-aluminum alloy material.

[0017] The beneficial effects of this invention are:

[0018] This invention discloses a portable temperature controller calibrator, comprising a main unit housing, an LCD screen, a terminal block area, a constant temperature field module, a measurement and detection module, a data processing and control module, and a storage module. The LCD screen and the terminal block area are located on the outer surface of the main unit housing, while the constant temperature field module, measurement and detection module, data processing and control module, and storage module are located inside the main unit housing. This temperature controller calibrator adopts an integrated design, displaying calibration results on the LCD screen. A transformer temperature controller is connected to the terminal block area. The overall operation is simple, and it is easy to carry, avoiding the problems of disassembling the transformer temperature controller and subsequent wiring errors caused during disassembly, thus greatly improving the efficiency of transformer temperature controller calibration.

[0019] This invention discloses a portable temperature controller calibrator. The constant temperature field module has a constant temperature tank that can be used for both dry and liquid applications. It can calibrate both oil surface temperature controllers and winding temperature controllers. This dual-purpose structure has a wide range of applications and can meet the temperature controller calibration requirements of different types of transformers. It avoids carrying too many tools, reduces the workload of operators, and further improves work efficiency.

[0020] This invention discloses a portable temperature controller calibrator. When used in liquid tank mode, i.e., when calibrating an oil-level temperature controller, the inner wall of the constant temperature tank is marked with a liquid level line, which helps the calibrator to observe the liquid level height intuitively and reliably. The constant temperature tank is equipped with a magnetic rotor and a liquid tank sleeve. The rotation of the magnetic rotor drives the rotation of the liquid tank sleeve, making the heating of the liquid in the constant temperature tank more uniform and obtaining more accurate calibration results.

[0021] The present invention provides a portable temperature controller calibrator. The constant temperature bath is a large-diameter bath with a diameter of 60mm. The design of this large-diameter bath can calibrate 5 oil surface temperature controllers at the same time, thereby improving the speed of on-site calibration. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a portable temperature controller calibrator proposed in this invention.

[0023] Figure 2 This is a schematic diagram of the internal structure of the constant temperature field module of a portable temperature controller calibrator proposed in this invention.

[0024] Figure 3 This is a schematic diagram of the wiring terminal area of ​​a portable temperature controller calibrator proposed in this invention.

[0025] Figure 4 This is a physical image of a portable temperature controller calibrator proposed in this invention.

[0026] Figure 5 This is a wiring diagram illustrating the calibration process of a portable temperature controller calibrator proposed in this invention.

[0027] Figure 6 This invention presents a calibration process control diagram for a portable temperature controller calibrator.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1-Main unit chassis;

[0030] 11-Slot cover, 12-Handle, 13-Foot pad.

[0031] 2- LCD screen.

[0032] 3-Terminal block area;

[0033] 31-Voltage detection jack, 32-Current detection jack, 33-RTD detection jack, 34-Temperature switch detection jack, 35-External standard platinum resistance thermometer interface, 36-USB data interface, 37-Power supply and switch.

[0034] 4-Constant Temperature Field Module;

[0035] 41-Dual-drive heating and temperature control device, 42-Constant temperature bath, 421-Magnetic rotor, 422-Liquid tank sleeve, 43-Temperature sensor. Detailed Implementation

[0036] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0039] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0040] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] like Figures 1-6 As shown, it illustrates a specific embodiment of the present invention:

[0043] Example 1:

[0044] A portable temperature controller calibrator includes a main unit housing 1, an LCD screen 2, a terminal block area 3, a constant temperature field module 4, a measurement and detection module, a data processing and control module, and a storage module. The main unit housing 1 has a near-cylindrical structure, with a sloping design on the front side of the upper surface of the main unit housing 1. The LCD screen 2 is mounted on the sloping surface. A slot cover 11 is rotatably connected to the rear side of the upper surface of the main unit housing 1. The terminal block area 3 is located on the front surface of the main unit housing 1. The constant temperature field module 4 is located inside the upper part of the main unit housing 1. The space after the slot cover 11 is opened is the constant temperature field. The measurement and detection module, the data processing and control module, and the storage module are located inside the lower part of the main unit housing 1, that is, below the constant temperature field module 4.

[0045] In this embodiment, as Figure 1 As shown, the LCD screen 2 and the terminal block area 3 are located on the outer surface of the main unit housing 1, while the constant temperature field module 4, the measurement and detection module, the data processing and control module, and the storage module are located inside the main unit housing 1. The temperature controller calibrator adopts an integrated design, and its calibration results are displayed on the LCD screen 2. The transformer temperature controller is connected to the terminal block area 3. The overall operation is simple and portable, avoiding the problems of disassembling the transformer temperature controller and secondary wiring errors caused during disassembly, which are common in traditional methods. This greatly improves the calibration efficiency of the transformer temperature controller.

[0046] In this embodiment, the actual size of the portable temperature controller calibrator is 380mm×225mm×452mm, and the weight is less than 15kg. Its actual size and weight make it easy to carry and can meet the work requirements of directly calibrating temperature controllers on site.

[0047] In this embodiment, the portable temperature controller calibrator features a non-disconnection calibration function, meaning that without disconnecting the secondary wiring of the temperature controller, it performs comparison calibration by connecting a standard platinum resistance thermometer to the temperature controller under test on-site. It can self-calibrate and self-adjust parameters; it supports contact calibration (set value, operating value) and indication calibration (upper stroke, lower stroke). This avoids the problems caused by disassembling the temperature controller in traditional calibration methods.

[0048] In this embodiment, the measurement and detection module acquires the indicated value signal, contact action signal, and transmitter output signal from the temperature controller, providing a foundation for subsequent data processing and analysis. This functionality is achieved through three parts: an indicated value signal acquisition circuit, a contact action detection circuit, and a transmitter signal acquisition circuit. The indicated value signal acquisition circuit samples the output voltage or current signal of the temperature controller using a high-precision analog-to-digital converter and converts it into a digital signal before transmitting it to the control and processing module. The contact action detection circuit monitors the on / off state of the temperature controller contacts using a switch signal acquisition device. When a contact closes or opens, it generates a corresponding closing or opening signal and records the temperature value at the moment of action. The transmitter signal acquisition circuit acquires the 0-20mA current signal or 0-5V voltage signal output from the temperature controller transmitter and converts it into a suitable signal format for processing through a signal conditioning circuit, thereby verifying the transmitter's functionality.

[0049] In this embodiment, the data processing and control module 7 serves as the control center of the transformer temperature controller field calibrator. Its main function is to process and analyze the acquired signals and achieve precise control of the calibration process. This module uses a high-performance embedded system as the controller to coordinate and manage the temperature simulation module, signal acquisition module, and user interface. Through error calculation and data analysis, key parameters such as the temperature controller's indication error, contact action error, and transmitter output error are obtained. Furthermore, this control and processing module can dynamically adjust the working state of the temperature simulation module according to the preset calibration process to ensure the continuity and accuracy of the calibration process.

[0050] In this embodiment, the data processing and control module 7 prioritizes ease of operation and intuitive information. The interface mainly comprises two parts: operation and display. The operation section uses a graphical design, enabling parameter setting, function selection, and process control via the LCD screen 2. Users can set the calibration temperature point, select calibration items (such as indication calibration, contact calibration, or transmitter calibration), and start or stop the calibration process through the operation interface. The display section shows key data and results during the calibration process in real time, including the current temperature value, temperature controller indication, contact action status, and error analysis results.

[0051] In this embodiment, the storage unit 8 enables data sharing with external devices (such as computers, printers, etc.), facilitating data storage and analysis. The calibrator can directly export calibration reports via the USB data interface 36, making it easy for users to archive and manage them, thereby significantly improving work efficiency.

[0052] In this embodiment, the parameters of the portable thermostat are shown in Table 1 below.

[0053] Table 1. Parameters related to the thermostat

[0054]

[0055] Example 2:

[0056] Specifically, the constant temperature field module 4 consists of a dual-drive heating and temperature control device 41, a constant temperature bath 42, and a temperature sensor 43. The constant temperature bath 42 is rotatably connected to the bath cover 11 at the top. The dual-drive heating and temperature control device 41 is located below the constant temperature bath 42. The temperature sensor 43 is located in the middle of the constant temperature bath 42. The dual-drive heating and temperature control device 41 and the temperature sensor 43 are connected to the data processing and control module 7.

[0057] In this embodiment, the constant temperature field module 4, as one of the core components of the portable temperature controller calibrator, primarily functions to simulate the temperature environment during transformer operation, providing an accurate temperature input signal for the temperature controller. This module precisely adjusts the heating circuit through the dual-drive heating and temperature control device 41, achieving precise control over temperature changes. A stable temperature field is provided by the constant temperature bath 42, whose structural design effectively ensures the uniformity and stability of the temperature field, meeting the requirements for contact action error calibration. Furthermore, the temperature sensor 43 uses a standard platinum resistance thermometer, a high-precision temperature measuring device used to monitor the temperature value within the constant temperature bath 42 in real time and feeds the measurement results back to the data processing and control module, thereby ensuring the accuracy and reliability of the temperature simulation.

[0058] Specifically, the constant temperature bath 42 is a dual-purpose structure for both dry and liquid baths.

[0059] In this embodiment, the constant temperature tank 42 of the constant temperature field module 4 is a dual-purpose structure for both dry and liquid tanks, which can verify both oil surface temperature controllers and winding temperature controllers. This dual-purpose structure has a wide range of applications and can meet the temperature controller verification requirements of different types of transformers. It avoids carrying too many tools, reduces the workload of operators, and further improves work efficiency.

[0060] In this embodiment, the dual-drive heating and temperature control device 41 ensures the consistency of the temperature field, achieving radial consistency ≤0.05℃. The temperature range covers -30℃ to 160℃, with a heating time (20℃ to 150℃) ≤30 minutes and a cooling time (highest temperature to 50℃) ≤28 minutes. Meeting these parameters, the temperature controller calibrator can simulate the temperature environment of a transformer during operation, providing an accurate temperature input signal for the temperature controller.

[0061] Specifically, the inner wall of the constant temperature bath 42 is marked with a liquid level line. The constant temperature bath 42 is equipped with a magnetic rotor 421 and a liquid tank sleeve 422. The magnetic rotor 421 is located below the constant temperature bath 42. One end of the liquid tank sleeve 422 is connected to the rotation shaft of the magnetic rotor 421 and rotates with the rotation of the magnetic rotor 421. The other end of the liquid tank sleeve 422 is connected to the tank cover 11.

[0062] In this embodiment, when the usage is in liquid tank mode, i.e. when calibrating the oil surface temperature controller, the inner wall of the constant temperature tank 42 is marked with a liquid level line, which can help the calibration personnel observe the liquid level height, making it intuitive and reliable. The constant temperature tank 42 is equipped with a magnetic rotor 421 and a liquid tank sleeve 422. The rotation of the magnetic rotor 421 drives the liquid tank sleeve 422 to rotate, making the heating of the liquid in the constant temperature tank 42 more uniform and obtaining more accurate calibration results.

[0063] Specifically, the constant temperature bath 42 is a large-diameter bath with a diameter of 60mm.

[0064] In this embodiment, the large-diameter tank of the constant temperature bath 42 has a diameter of 60mm, which can simultaneously calibrate 5 oil surface temperature controllers, thus improving the speed of on-site calibration.

[0065] Example 3:

[0066] Specifically, the measurement and detection module includes an indication signal acquisition circuit, a contact action detection circuit, and a transmitter signal acquisition circuit. The measurement and detection module is connected to the terminal block area 3 and the data processing and control module 7.

[0067] Specifically, the terminal block area 3 includes a voltage detection socket 31, a current detection socket 32, a resistance temperature detector (RTD) socket 33, a temperature switch detection socket 34, an external standard platinum resistance thermometer (PTT) interface 35, a USB data interface 36, and a power switch 37. The voltage detection socket 31, current detection socket 32, and RTD socket 33 have the same appearance and structure, and are located at the top of the front surface. There are two RTD sockets 33, and one voltage detection socket 31 and one current detection socket 32. The temperature switch detection socket 34 and the external standard PTD interface 35 are located in the middle of the front surface. The USB data port 36 is located below the temperature switch detection socket 34 and the external standard PTD interface 35. There are two USB data ports 36. The power switch 37 is located below the USB data port 36.

[0068] In this embodiment, the sockets in the terminal block area 3 facilitate insertion and removal during the actual verification process. The use of sockets not only makes it convenient to use but also ensures good wire connectivity, avoiding verification failures caused by poor contact.

[0069] Example 4:

[0070] Specifically, a handle 12 is provided in the middle of the upper surface of the main unit housing 1, and heat dissipation vents 12 are provided at the edge of the groove cover 11 at the rear of the upper surface of the main unit housing 1 and on both sides of the constant temperature groove 42 of the main unit housing 1. The heat dissipation vents at the edge of the groove cover 11 are designed as a grille, and the heat dissipation vents on both sides of the constant temperature groove 42 are designed as fan-shaped vents.

[0071] Specifically, a foot pad 13 is provided at the bottom of the main unit housing 1.

[0072] Specifically, the outer shell of the main unit housing 1 is made of all-aluminum alloy material.

[0073] In this embodiment, the handle 12 is used to carry the temperature controller calibrator. The calibrator operator can directly move the calibrator to a different location using the handle 12, making the operation simple and convenient.

[0074] In this embodiment, the temperature controller calibrator needs to be placed on a flat and sturdy base surface during use to perform the calibration work, such as the ground or the surface of a stainless steel packaging box. At the same time, the flat base surface should be kept clean, because the calibrator is air-cooled and circulating, and dust should be prevented from being blown up and contaminating the equipment. The feet 1 are set under the main unit housing 1 to prevent debris or dust from entering the bottom of the calibrator and causing contamination, thereby affecting the use of the calibrator. The feet 1 raise the overall height of the calibrator and prevent contamination on the flat base surface.

[0075] In this embodiment, the outer shell of the main unit housing 1 is made of all-aluminum alloy material, which is lightweight, easy to carry, and sturdy and durable, thus improving the service life of the device.

[0076] Example 5:

[0077] In this embodiment, when the portable temperature controller calibrator is actually used to calibrate the transformer temperature controller, the process is as follows (the calibration steps listed in this embodiment are for calibrating the oil surface temperature controller; the steps for calibrating the winding temperature controller are similar, involving removing the portable oil tank and calibrating the winding temperature controller in a dry state):

[0078] First, open the slot cover 11.

[0079] The second step is to add silicone oil into the thermostatic bath 42. When adding the medium, fill it up to the liquid level line (about 420ml for the first filling). Due to the thermal expansion and contraction of the liquid, the upper part of the thermostatic bath 42 is reserved for liquid expansion.

[0080] The third step is verification. The specific steps for using the verification instrument are as follows:

[0081] S31: Power-on procedure: Press the "Power Switch" button on the front of the device to connect the power and start the device system.

[0082] S32: Temperature setting. Touch the [Set Temperature] key, enter the desired temperature using the touch numeric keys, and touch the [Confirm] key to complete the temperature input. Touching the [Back] key once will delete one character. Touching the [Cancel] key will cancel the current temperature input and return to the last entered temperature value.

[0083] Use the up and down arrow keys on the keyboard to navigate to the temperature setting, press the <OK> key, use the up, down, left, and right arrow keys to input the temperature, and finally press the <OK> key to complete the temperature input.

[0084] After completing the temperature input, return to the previous screen. The standard temperature will then be updated in real time until the target temperature is reached. You can touch the [Stop] button at any time during the process to terminate the verification.

[0085] S33: To set the stirring speed, touch the [Set Stirring] button, use the number keys to input the stirring speed, and touch the [Confirm] button to complete setting the stirring speed.

[0086] The stirring speed can be selected between 0 and 100, but it is usually set between 40 and 60. The default speed upon startup is "50". When used as a dry block furnace, the stirring speed must be set to 0. If the stirring speed is set too high, the stirrer will bounce up and down, accompanied by a clicking sound. At this time, the stirring is basically ineffective, resulting in uneven temperature field and affecting the calibration effect. Then, reset to a normal stirring speed.

[0087] S34: Contact verification. Touch the [Contact Verification] button to enter the contact verification interface.

[0088] S341: Touch the blank cell in the number field to input the thermostat number into the box. After completing the number input, touch the [Confirm] button to complete the thermostat number input.

[0089] S342: Touching the [Verify Contact] button will show a "√" if the box indicates that the contact switch is being verified by default; if the box shows a " / ", the contact switch will not be verified by default.

[0090] S343: Touch the box at [Number of Contacts], enter the number of verification contact points for the table, and touch the [Confirm] button to complete the input of the number of verification contact points.

[0091] After completing the [Number of Contacts] input, the thermostat's "Set Value" will change as the number of contacts is verified. For example, if the thermostat's number of contacts is "3", the "Set Value" field will display "Contact 1, Contact 2, Contact 3". Input the action values ​​marked on the thermostat into the contact fields.

[0092] Note: Contact 1 corresponds to the first point of the thermostat. They should be connected one by one in sequence and should not be crossed.

[0093] S344: Touching the box at [Inspection Value] is the same as the [Verify Contact] operation.

[0094] S345: Touch the "Stable" setting, input the temperature stabilization time using the touch number, and finally touch the "Confirm" button to complete the temperature stabilization time. The program defaults to "4", and the temperature change within 4 minutes is ≤0.02℃.

[0095] S346: Touch the [Type] section. The options in the box are: 2-wire, 3-wire, 4-wire, —. The system default is "—". For example, if the thermostat "Pt100" has three leads, the type should be selected as "3-wire". Touching the "3-wire" [Type] section will display "3-wire".

[0096] S347: Touch the [Check Return Stroke] button. If the box shows "√", the default is that the indicated temperature can be checked for both upper and lower strokes. If the box shows " / ", the default is that only the upper stroke is checked.

[0097] S348: Touch the [External Standard] button. If the box shows "√", the default is to use the external standard reading as the thermostat's action contact value. If the box shows "×", the default is to use the built-in temperature reading as the thermostat's action value.

[0098] S349: After setting, touch the [Start] button to calibrate the setpoint of the thermostat. When the temperature rises to the indicated value, you will be prompted to enter the indicated value. Touch the blank box of the indicated value point, visually observe the position indicated by the thermostat pointer on the pop-up interface, touch the digital input of the visually observed value, and then touch the [OK] button to complete the input of the indicated value.

[0099] S3410: The contact value verification software automatically completes contact verification without manual operation or input. The software performs the verification according to the settings. Touching the [Save] button saves the test data, which can be viewed through the "Data Browser" interface. The [Stop] button can be touched at any time during the process to terminate the verification. Touching the [Stop] button during verification will not save the test data when touching the [Save] button. Touching the [Start] button will restart the verification process by default.

[0100] S35: Data browsing, the specific process is as follows:

[0101] S351: On the main interface, touch the 'Data Browsing' button to enter the historical data browsing interface. If no historical data is saved in the system, the system will automatically exit the historical data browsing interface.

[0102] S352: In historical data browsing, the system can store over 800 sets of verification results. For example, "Item 01" indicates the storage number of the verification result and the data to be uploaded. Query methods include: numeric query and touch-based pagination. First: Touch the "Item 01" key, enter the query number, and touch the "OK" key. The data in the historical browsing box will be refreshed to the data you want to query. Second: Touch the current page, swipe up to view the next test data item; swipe down to view the previous test data item.

[0103] S353: Touching the "Upload Data" button allows you to upload historical data from the current page to your computer via a communication cable. The uploaded data can then be queried, modified, and printed using the computer.

[0104] S354: Test data to be downloaded has been found. No USB drive was detected. You need to insert the USB drive into the USB port. Once the system detects the USB drive, it will display a successful connection. Touch the 'Single Download' button or the 'Download All' button. During the download process, the 'Single Download' button or the 'Download All' button will turn blue. Once the download is complete, press the 'Single Download' button or the 'Download All' button again.

[0105] S355: Touching the 'Delete' button will delete the data on the current page.

[0106] S356: Touch the 'Print' button to print the current page.

[0107] S357: Touch the [Exit] button and the system will return to the main interface.

[0108] S36: Indication value verification. The indication value verification operation is the same as the contact verification operation.

[0109] S37: Voltage and current verification. Touch the [Voltage and Current] key. Before verification, first determine the temperature controller range. Enter the actual range of the temperature controller into the 'Temperature Range' field. Touch the blank space. In the pop-up interface, touch the numeric input of the range value. After inputting, touch the [Confirm] key.

[0110] To perform current calibration, touch the blank space under "Temperature Range". In the pop-up window, enter "4-20mA" into the blank space and touch the "Confirm" button to complete the current input operation. Place the temperature sensor in the tank and take several temperature points for comparison. Visually check whether the temperature controller pointer and the temperature converted from the "4-20mA" input are within the error range.

[0111] The voltage verification and current verification operations are the same.

[0112] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0113] Many other changes and modifications can be made without departing from the concept and scope of this invention. It should be understood that this invention is not limited to the specific embodiments, and the scope of this invention is defined by the appended claims.

Claims

1. A portable temperature controller calibrator, characterized in that, The system includes a main unit housing (1), an LCD screen (2), a terminal block area (3), a constant temperature field module (4), a measurement and detection module, a data processing and control module, and a storage module. The main unit housing (1) has a cylindrical structure. The front side of the upper surface of the main unit housing (1) is designed with an inclined slope. The LCD screen (2) is set on the inclined slope. A slot cover (11) is rotatably connected to the rear side of the upper surface of the main unit housing (1). The terminal block area (3) is located on the front surface of the main unit housing (1). The constant temperature field module (4) is located inside the upper part of the main unit housing (1). The space after the slot cover (11) is opened is the constant temperature field. The measurement and detection module, the data processing and control module, and the storage module are located inside the lower part of the main unit housing (1), that is, below the constant temperature field module (4).

2. The portable temperature controller calibrator according to claim 1, characterized in that, The constant temperature field module (4) consists of a dual-drive heating and temperature control device (41), a constant temperature bath (42), and a temperature sensor (43). The constant temperature bath (42) is rotatably connected to the bath cover (11) at the top position. The dual-drive heating and temperature control device (41) is located below the constant temperature bath (42). The temperature sensor (43) is located in the middle position of the constant temperature bath (42). The dual-drive heating and temperature control device (41) and the temperature sensor (43) are connected to the data processing and control module (7).

3. A portable temperature controller calibrator according to claim 2, characterized in that, The constant temperature bath (42) is a dual-purpose structure for both dry and liquid baths.

4. A portable temperature controller calibrator according to claim 1, characterized in that, The measurement and detection module includes an indication signal acquisition circuit, a contact action detection circuit and a transmitter signal acquisition circuit. The measurement and detection module is connected to the terminal block area (3) and the data processing and control module (7).

5. A portable temperature controller calibrator according to claim 1, characterized in that, The terminal block area (3) includes a voltage detection socket (31), a current detection socket (32), a resistance temperature detector (RTD) socket (33), a temperature switch detection socket (34), an external standard platinum resistance interface (35), a USB data interface (36), and a power supply and switch (37). The voltage detection socket (31), the current detection socket (32), and the RTD socket (33) have the same appearance and structure, and are located at the top of the front surface. There are two RTD sockets (33), and one voltage detection socket (31) and one current detection socket (32). The temperature switch detection socket (34) and the external standard platinum resistance interface (35) are located in the middle of the front surface. The USB data port (36) is located below the temperature switch detection socket (34) and the external standard platinum resistance interface (35). There are two USB data ports (36). The power supply and switch (37) is located below the USB data port (36).

6. A portable temperature controller calibrator according to claim 2, characterized in that, The inner wall of the constant temperature bath (42) is marked with a liquid level line. The constant temperature bath (42) is equipped with a magnetic rotor (421) and a liquid tank sleeve (422). The magnetic rotor (421) is located below the constant temperature bath (42). One end of the liquid tank sleeve (422) is connected to the rotating shaft of the magnetic rotor (421) and rotates with the rotation of the magnetic rotor (421). The other end of the liquid tank sleeve (422) is connected to the tank cover (11).

7. A portable temperature controller calibrator according to claim 1, characterized in that, A handle (12) is provided in the middle of the upper surface of the main unit housing (1). Heat dissipation vents (12) are provided at the edge of the groove cover (11) on the upper surface of the main unit housing (1) and on both sides of the constant temperature tank (42) of the main unit housing (1). The heat dissipation vents at the edge of the groove cover (11) are set in the shape of a grid, and the heat dissipation vents in the shape of a fan are provided on both sides of the constant temperature tank (42).

8. A portable temperature controller calibrator according to claim 1, characterized in that, A foot pad (13) is provided under the main unit housing (1).

9. A portable temperature controller calibrator according to claim 2, characterized in that, The constant temperature bath (42) is a large-diameter bath with a diameter of 60 mm.

10. A portable temperature controller calibrator according to claim 1, characterized in that, The outer shell of the main unit (1) is made of all-aluminum alloy material.

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