A temperature sensor calibration auxiliary device and its use method

Abstract

The present invention relates to the field of sensor calibration technology, and discloses a temperature sensor calibration auxiliary device, comprising a sensor mounting tube, the two ends of which are connected to a medium circulation pipeline, the medium circulation pipeline being filled with a heat-conducting medium, the temperature of which can be changed and maintained at different preset constant temperatures; and a reference temperature sensor, the reference sensor being configured to have passed inspection by a third-party inspection agency, the detection end of the reference temperature sensor extending into the heat-conducting medium for detecting a reference temperature value of the heat-conducting medium; a plurality of connection sockets for mounting temperature sensors to be measured are provided on the outside of the sensor mounting tube, the temperature sensors to be measured being detachably connected to the connection sockets, the detection ends of the temperature sensors to be measured extending into the sensor mounting tube to detect the temperature of the heat-conducting medium and obtain a detection value. The present invention has the advantageous effects of being easy to use and capable of simultaneously performing batch auxiliary calibration of temperature sensors.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor calibration, and in particular to a temperature sensor calibration auxiliary device and a use method thereof. Background Art

[0002] In the field of biopharmaceutical equipment, almost all devices involve temperature control, and temperature plays a key role in the production process of production equipment. Accurate temperature measurement is the most important and fundamental function of biopharmaceutical equipment. To ensure accurate temperature measurement, the temperature sensors in biopharmaceutical equipment need to be regularly calibrated and, if necessary, calibrated. There are two most commonly used temperature values in biopharmaceutical equipment: 37°C, which is the optimal temperature for bacterial and cell culture, and 121°C, which is the optimal temperature for sterilization. Currently, commonly used calibration equipment usually uses a constant temperature bath, which has a wide constant temperature range. However, this type of calibration equipment is expensive and inconvenient to use. It can only calibrate a single temperature sensor at a time, and a piece of biopharmaceutical equipment usually contains multiple temperature sensors, resulting in low calibration efficiency. Summary of the Invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a temperature sensor calibration auxiliary device and a method for using the device, which is easy to use and can perform batch auxiliary calibration of temperature sensors.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A temperature sensor calibration auxiliary device, comprising

[0006] a sensor mounting tube, both ends of which are connected to a medium circulation pipeline, wherein the medium circulation pipeline is filled with a heat-conducting medium, the temperature of which can be changed and maintained at different preset constant temperatures; and

[0007] A reference temperature sensor, wherein the reference temperature sensor is configured to have passed inspection by a third-party inspection agency, and a detection end of the reference temperature sensor extends into the heat-conducting medium to detect a reference temperature value of the heat-conducting medium;

[0008] Among them, several connecting seats for installing the temperature sensor to be measured are provided on the outside of the sensor mounting tube. The temperature sensor to be measured is detachably connected to the connecting seat. The detection end of the temperature sensor to be measured is extended into the sensor mounting tube to detect the temperature of the heat-conducting medium and obtain the detection value.

[0009] The temperature sensor to be calibrated is mounted on the connector, and a reference temperature sensor is installed in the medium circulation pipeline to detect the temperature of the medium, thereby obtaining a reference temperature value. The temperature of the heat-conducting medium is maintained at this reference temperature value, and the detection value of the temperature sensor to be measured is then observed. Finally, the detection value is calibrated to the reference temperature value. This calibration auxiliary device itself provides a temperature reference for the temperature sensor to be measured. The calibration of the temperature sensor to be measured is performed using the calibration module built into the biopharmaceutical equipment. The calibration auxiliary device is characterized by its ease of use and its ability to provide temperature references for multiple temperature sensors to be measured simultaneously, thereby improving the calibration efficiency of the temperature sensors.

[0010] Preferably, the medium circulation pipeline is equipped with an electric heater for heating the heat-conducting medium and a circulation pump for circulating the heat-conducting medium. A liquid inlet pipe is provided at the lower end of the medium circulation pipeline, and a liquid outlet pipe is connected in parallel to the liquid inlet pipe. A safety valve group for controlling the pressure of the heat-conducting medium in the medium circulation pipeline is provided at the connection between the liquid inlet pipe and the liquid outlet pipe. A return pipe is provided between the upper end of the medium circulation pipeline and the liquid outlet pipe, and an electrically controlled valve is provided on the return pipe. The return pipe can discharge air when the heat-conducting medium enters the medium circulation pipeline, thereby preventing residual air in the medium circulation pipeline from affecting the temperature.

[0011] Preferably, the heat transfer medium is cooling water with an initial temperature of 5-30°C, and the operating pressure of the heat transfer medium in the medium circulation pipeline is 2.5-3.5 Bar. When the operating pressure of the heat transfer medium exceeds 3.5 Bar, the safety valve group automatically drains and relieves pressure. Directly using water as the heat transfer medium is low-cost and low-pollution (when tap water at room temperature meets the above temperature range, direct tap water can be directly used). The pressure of the heat transfer medium is controlled to increase the boiling point of the water so that the water can be heated to 125°C to meet the temperature sensor calibration requirements in the biopharmaceutical field. The cooling water is heated by an electric heater. When the (already heated) cooling water needs to be cooled, it is only necessary to open the electric control valve to allow the cooling water at the initial temperature in the liquid inlet pipe to enter the medium circulation pipeline. At the same time, some of the heated cooling water is discharged from the electric control valve to cool the heat transfer medium (water) in the medium circulation pipeline.

[0012] Preferably, both ends of the sensor mounting tube are provided with pipe joints, the inner ends of the pipe joints being fixedly connected to the sensor mounting tube, and the lower ends of the pipe joints being connected to the medium circulation pipeline via a clamp. Both ends of the sensor mounting tube are connected to the medium circulation pipeline via pipe joints via clamps, making installation and removal very convenient.

[0013] Preferably, the upper end of one of the pipe joints extends to form an upper channel, the upper end of the upper channel is provided with an upper clamp seat, the upper end of the reference temperature sensor is fixed with a connecting sleeve, the lower end of the connecting sleeve is provided with a lower clamp seat, the detection end of the reference temperature sensor is inserted axially from top to bottom into the medium circulation pipeline from the upper channel, and the upper clamp seat and the lower clamp seat are connected by a clamp; the upper end of the other pipe joint is connected to the upper end of the return pipe. The detection end of the reference temperature sensor is directly inserted into the center position of the medium circulation pipeline, thereby obtaining a very accurate reference temperature value; and in order to ensure the accuracy of the entire calibration auxiliary device, it needs to be inspected regularly. In this application, the reference temperature sensor is directly connected by a clamp, which is very convenient to disassemble. Therefore, when submitting for inspection, it is only necessary to directly remove the reference temperature sensor separately and send it to a third party for inspection, without having to move the entire device for inspection.

[0014] Preferably, the sensor mounting tube is U-shaped, with its plane extending horizontally and positioned at the upper end of the medium circulation pipeline. A chuck interface is provided at the outer end of the connection base, and the temperature sensor to be measured is connected to the chuck interface via a clamp. This facilitates installation and removal of the temperature sensor to be measured from the connection base.

[0015] Preferably, the connecting sockets are alternately positioned on either side of the sensor mounting tube, with their axes passing through the axis of the sensor mounting tube. The outer ends of the connecting sockets are tilted upward, forming an angle of 45°-60° between the axes of the connecting sockets and the horizontal plane. The detection ends of the temperature sensors to be measured extend into the sensor mounting tube and connect to the connecting sockets. In this manner, adjacent temperature sensors to be measured are staggered (out of phase) along the axial direction of the sensor mounting tube. This ensures that the temperature of the heat transfer medium flowing within the sensor mounting tube is more uniform, minimizing errors caused by local temperature variations in the heat transfer medium.

[0016] Preferably, the inner end of the connection base extends toward the inner center of the sensor mounting tube to form a closed thermal isolation sleeve, which completely isolates the heat-conducting medium from the internal space of the connection base. The thermal isolation sleeve is filled with thermal silicone oil; the outer wall of the thermal isolation sleeve is provided with a plurality of annular grooves. The thermal isolation sleeve completely isolates the inside and outside of the connection base, thereby isolating the sensor to be tested from the thermal medium, preventing the pressure of the thermal medium from acting on the temperature sensor to be tested. The heat of the thermal medium is transferred to the thermal silicone oil, making the temperature of the thermal silicone oil the same as that of the thermal medium. Ultimately, the temperature value of the thermal silicone oil detected by the temperature sensor to be tested is the temperature value of the thermal medium; the annular grooves effectively increase the heat transfer area.

[0017] Preferably, the machine further comprises a frame, a controller provided on the frame for adjusting the temperature of the medium in the medium circulation pipeline, the electric heater, the circulation pump and the electric control valve are all connected to the controller; and rollers are provided at the bottom of the frame for easy movement.

[0018] A method for using a temperature sensor calibration device comprises the following steps:

[0019] S1. Install a reference temperature sensor that has passed the inspection of a third-party testing agency in the medium circulation pipeline. Remove the temperature sensor to be measured from other biopharmaceutical equipment and install it on the connecting socket. The temperature sensor to be measured is still connected to the biopharmaceutical equipment via a data cable.

[0020] S2. Open the electric control valve on the return pipe and supply the heat transfer medium into the medium circulation pipeline from the liquid inlet pipe. After the air in the medium circulation pipeline is completely discharged from the return pipe, close the electric control valve. When the pressure in the medium circulation pipeline reaches the preset value, the safety valve group closes, and the entire medium circulation pipeline forms a closed loop.

[0021] S3. The circulation pump is turned on and the heat transfer medium is heated by the electric heater. When the detection value of the reference temperature sensor reaches the preset temperature value t1, the controller adjusts the heat transfer medium in the medium circulation pipeline according to the value of t1, so that the heat transfer medium is stabilized at a constant temperature state of t1, which is the reference temperature value.

[0022] S4. Obtain a detection value T1 of a corresponding temperature sensor to be measured from the biopharmaceutical equipment. If the detection value T1 is equal to the reference temperature value t1 or the error is within an allowable range, there is no need to calibrate the temperature sensor to be measured. If the error between the detection value T1 and the reference temperature value t1 is outside the allowable range, calibrate the temperature sensor to be measured directly on the biopharmaceutical equipment so that the detection value T1 is equal to the reference temperature value t1.

[0023] S5. Repeat steps S3 and S4 several times to obtain the detection values T2, T3, ..., Tn of the corresponding temperature sensor under test under the reference temperature values t2, t3, ..., tn, compare the detection value Tn with the reference temperature value tn, and calibrate the corresponding sensor under test according to the method in step S4;

[0024] S6. After the temperature sensor to be measured is calibrated, it is removed from the connection seat, cleaned, and then installed back into the corresponding biopharmaceutical equipment.

[0025] Therefore, the present invention is easy to use, can simultaneously install multiple temperature sensors to be measured, and provide a reference temperature for the temperature sensors to be measured; the reference temperature sensor is easy to disassemble and assemble and can be inspected separately; water is used as a circulating heat transfer medium, with low overall cost and little pollution; a thermal isolation sleeve is provided to separate the temperature sensor to be measured from water, which can not only protect the temperature sensor to be measured but also prevent leakage at the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 Schematic diagram of the sensor installation pipe connected to the medium circulation pipeline.

[0028] Figure 3 This is a connection diagram between the temperature sensor to be measured and the sensor mounting tube.

[0029] Figure 4 for Figure 3 Front view of .

[0030] Figure 5 for Figure 4 Cross-sectional view at AA in the middle.

[0031] Figure 6 for Figure 4 Cross-sectional view at the middle BB.

[0032] In the figure: sensor mounting tube 1, connecting seat 10, chuck interface 100, thermal isolation sleeve 101, thermal silicone oil 102, annular groove 103, medium circulation pipeline 2, liquid inlet pipe 20, liquid outlet pipe 21, safety valve group 22, reflux pipe 23, electric control valve 24, thermal medium 3, reference temperature sensor 4, connecting sleeve 40, lower clamp seat 41, temperature sensor 5, electric heater 6, circulating pump 7, frame 8, roller 80, controller 9, pipe joint 11, upper channel 110, upper clamp seat 111, clamp 12. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the scope of protection of the present invention.

[0034] It should be understood that, in this document, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as implicitly specifying the quantity of the technical features being referenced. A feature specified as "first" or "second" may explicitly or implicitly indicate that at least one of the features is included.

[0035] like Figures 1-6 A temperature sensor calibration auxiliary device shown in the figure includes a sensor mounting tube 1, both ends of which are connected to a medium circulation pipeline 2, the medium circulation pipeline is filled with a heat-conducting medium 3, the temperature of the heat-conducting medium 3 can be changed and can be maintained at different preset constant temperature states; and a reference temperature sensor 4, the reference sensor 4 is configured to have passed the inspection of a third-party inspection agency, and the detection end of the reference temperature sensor 4 extends into the heat-conducting medium to detect the reference temperature value of the heat-conducting medium; the outer side of the sensor mounting tube 1 is provided with a plurality of connecting seats 10 for installing the temperature sensor 5 to be measured, and the temperature sensor 5 to be measured is detachably connected to the connecting seat, and the detection end of the temperature sensor 5 to be measured extends into the sensor mounting tube 1 to detect the temperature of the heat-conducting medium and obtain the detection value.

[0036] The medium circulation pipeline 2 is equipped with an electric heater 6 for heating the heat-conducting medium and a circulation pump 7 for circulating the heat-conducting medium. An inlet pipe 20 is provided at the lower end of the medium circulation pipeline 2, connected in parallel to an outlet pipe 21. A safety valve assembly 22 for controlling the pressure of the heat-conducting medium in the medium circulation pipeline is located at the junction of the inlet and outlet pipes. A return pipe 23 is provided between the upper end of the medium circulation pipeline and the outlet pipe, and an electrically controlled valve 24 is installed on the return pipe. In this embodiment, the medium circulation pipeline 2 is mounted on a frame 8, which is equipped with a controller 9 for regulating the temperature of the medium in the medium circulation pipeline. The electric heater 6, circulation pump 7, and electrically controlled valve 24 are all connected to the controller. Rollers 80 are provided at the bottom of the frame for easy movement. The return pipe is initially used to evacuate air from the medium circulation pipeline. Once the air is evacuated, the electrically controlled valve closes.

[0037] Heat transfer medium 3 uses cooling water with an initial temperature of 5-30°C. The operating pressure of the heat transfer medium in the medium circulation pipeline is 2.5-3.5 Bar. When the operating pressure of the heat transfer medium exceeds 3.5 Bar, the safety valve group automatically drains the liquid to relieve pressure. Generally, the cooling water is directly tap water at room temperature. If the initial tap water temperature exceeds the required level, the tap water is first cooled in a cooler before being supplied to the medium circulation pipeline.

[0038] After the cooling water at the initial temperature enters the medium circulation pipeline, it is heated by the electric heater to a preset reference temperature; if the heated cooling water needs to be cooled, the electric control valve is directly opened, and the liquid inlet pipe continues to supply cooling water at the initial temperature to the medium circulation pipeline, and the heated cooling water is discharged from the return pipe, thereby achieving cooling. The controller combines the detection value of the reference temperature sensor (the detection value is the reference temperature value) and performs feedback adjustment on the heating medium through the above-mentioned heating or cooling method, so that the heating medium maintains a constant temperature at the reference temperature value. The controller controls the electric heater and the electric control valve based on the reference temperature value to maintain a constant temperature of the heat-conducting medium. This is a prior art in itself and will not be elaborated here.

[0039] like Figure 3 and Figure 5 As shown, both ends of the sensor mounting tube 1 are provided with pipe joints 11, the inner end of the pipe joint 11 is fixedly connected to the sensor mounting tube, and the lower end of the pipe joint is connected to the medium circulation pipeline through a clamp 12. The upper end of one of the pipe joints 11 extends to form an upper channel 110, and the upper end of the upper channel is provided with an upper clamp seat 111. The upper end of the reference temperature sensor 4 is fixedly provided with a connecting sleeve 40, and the lower end of the connecting sleeve is provided with a lower clamp seat 41. The detection end of the reference temperature sensor is axially inserted into the medium circulation pipeline from top to bottom in the upper channel, and the upper clamp seat and the lower clamp seat are connected by a clamp; the upper end of the other pipe joint is connected to the upper end of the return pipe.

[0040] The sensor mounting tube 1 is a U-shaped structure, its plane extending horizontally and positioned at the upper end of the medium circulation pipeline 2. A chuck interface 100 is provided at the outer end of the connecting seat 10, connecting the temperature sensor to be measured to the chuck interface via a clamp (the clamp is omitted in the figure; see clamp 12 for its detailed structure). The connecting seats 10 are alternately arranged on either side of the sensor mounting tube 1. The axis of the connecting seat passes through the axis of the sensor mounting tube, and the outer ends of the connecting seats are tilted upward, forming an angle of 45°-60° with the horizontal plane. In this embodiment, ten connecting seats are provided, five on each side of the U-shaped sensor mounting tube, and the angle between the axis of the connecting seat and the horizontal plane is set at 45°.

[0041] like Figure 6As shown, the inner end of the connector 10 extends toward the center of the sensor mounting tube to form a closed thermal isolation sleeve 101. This sleeve completely isolates the heat-conducting medium from the interior space of the connector. The sleeve is filled with thermally conductive silicone oil 102, and its outer wall is provided with a number of annular grooves 103. The sleeve completely isolates the heat-conducting medium from the interior space of the connector. When the sensor to be tested is inserted into the thermally conductive silicone oil, the heat from the heat-conducting medium is transferred to the silicone oil through the sleeve, equalizing the temperature of the silicone oil and the heat-conducting medium. Since the heat-conducting medium has a large pressure, there is a risk that the heat-conducting medium will penetrate into the temperature sensor to be measured when the temperature sensor is in direct contact with the heat-conducting medium. The provision of the thermal isolation sleeve completely isolates the heat-conducting medium (water) from the temperature sensor to be measured, eliminating this risk and effectively preventing leakage at the connection between the temperature sensor to be measured and the connector. Moreover, during the calibration process, since the calibration points of the temperature sensors to be measured on different biopharmaceutical equipment are different, the temperature sensor to be measured can be removed or replaced at any time according to actual needs without affecting other temperature sensors to be measured, making it more flexible and maneuverable to use.

[0042] A method for using a temperature sensor calibration auxiliary device comprises the following steps:

[0043] S1. Install a reference temperature sensor that has passed the inspection of a third-party testing agency in the medium circulation pipeline. Remove the temperature sensor to be measured from other biopharmaceutical equipment and install it on the connecting socket. The temperature sensor to be measured is still connected to the biopharmaceutical equipment via a data cable.

[0044] S2. Open the electric control valve on the return pipe and supply the heat transfer medium into the medium circulation pipeline from the liquid inlet pipe. After the air in the medium circulation pipeline is completely discharged from the return pipe, close the electric control valve. When the pressure in the medium circulation pipeline reaches the preset value, the safety valve group closes, and the entire medium circulation pipeline forms a closed loop.

[0045] S3. The circulation pump is turned on and the heat transfer medium is heated by the electric heater. When the detection value of the reference temperature sensor reaches the preset temperature value t1, the controller adjusts the heat transfer medium in the medium circulation pipeline according to the value of t1, so that the heat transfer medium is stabilized at a constant temperature state of t1, which is the reference temperature value.

[0046] S4. Obtain a detection value T1 of a corresponding temperature sensor to be measured from the biopharmaceutical equipment. If the detection value T1 is equal to the reference temperature value t1 or the error is within an allowable range, there is no need to calibrate the temperature sensor to be measured. If the error between the detection value T1 and the reference temperature value t1 is outside the allowable range, calibrate the temperature sensor to be measured directly on the biopharmaceutical equipment so that the detection value T1 is equal to the reference temperature value t1.

[0047] S5. Repeat steps S3 and S4 several times to obtain the detection values T2, T3, ..., Tn of the corresponding temperature sensor under test under the reference temperature values t2, t3, ..., tn, compare the detection value Tn with the reference temperature value tn, and calibrate the corresponding sensor under test according to the method in step S4;

[0048] S6. After the temperature sensor to be measured is calibrated, it is removed from the connection seat, cleaned, and then installed back into the corresponding biopharmaceutical equipment.

[0049] In this embodiment, the temperature values of t1, t2, t3, ..., tn are set as follows: t1 is set to 37°C, tn is set to 121°C, and then a value is set at intervals between 37°C and 121°C. For example, t2 is set to 60°C, and t3 is set to 90°C. Four calibration points are set at 37°C, 60°C, 90°C, and 121°C to calibrate the sensor under test. Those skilled in the art may add or reduce calibration points based on the calibration accuracy requirements of the sensor under test.

[0050] In the description of the present invention, it should be understood that the directions or positional relationships indicated by up, down, left, right, inner end, outer end, one end, the other end, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of more clearly describing the technical solution of the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific orientation, and cannot be understood as a limitation of the present invention.

[0051] Although specific embodiments of the present invention are described in detail herein, they are provided for illustrative purposes only and should not be considered to limit the scope of the present invention. Various substitutions, changes, and modifications may be conceived without departing from the spirit and scope of the present invention.

Claims

1. A temperature sensor calibration auxiliary device, characterized in that: include A sensor mounting tube, both ends of which are connected to a medium circulation pipeline, wherein the medium circulation pipeline is filled with a heat-conducting medium, the temperature of which can be changed and maintained at different preset constant temperatures; as well as A reference temperature sensor, wherein the reference temperature sensor is configured to have passed inspection by a third-party inspection agency, and a detection end of the reference temperature sensor extends into the heat-conducting medium to detect a reference temperature value of the heat-conducting medium; The outer side of the sensor mounting tube is provided with a plurality of connection seats for mounting the temperature sensor to be measured, the temperature sensor to be measured is detachably connected to the connection seat, and the detection end of the temperature sensor to be measured is inserted into the sensor mounting tube to detect the temperature of the heat-conducting medium and obtain the detection value; The medium circulation pipeline is provided with an electric heater for heating the heat-conducting medium and a circulation pump for driving the heat-conducting medium to circulate; the lower end of the medium circulation pipeline is provided with a liquid inlet pipe, and the liquid inlet pipe is connected in parallel with the liquid outlet pipe. A safety valve group for controlling the pressure of the heat-conducting medium in the medium circulation pipeline is provided at the connection between the liquid inlet pipe and the liquid outlet pipe. A return pipe is provided between the upper end of the medium circulation pipeline and the liquid outlet pipe, and the return pipe is provided with an electric control valve; Both ends of the sensor installation tube are provided with pipe joints, the inner end of the pipe joint is fixedly connected to the sensor installation tube, and the lower end of the pipe joint is connected to the medium circulation pipeline through a clamp; The upper end of one of the pipe joints extends to form an upper channel, the upper end of the upper channel is provided with an upper clamp seat, the upper end of the reference temperature sensor is fixed with a connecting sleeve, the lower end of the connecting sleeve is provided with a lower clamp seat, the detection end of the reference temperature sensor is axially inserted into the medium circulation pipeline from top to bottom in the upper channel, and the upper clamp seat and the lower clamp seat are connected by a clamp; the upper end of the other pipe joint is connected to the upper end of the return pipe.

2. A temperature sensor calibration auxiliary device according to claim 1, characterized in that: The heat transfer medium is cooling water with an initial temperature of 5-30°C. The working pressure of the heat transfer medium in the medium circulation pipeline is 2.5-3.5 Bar. When the working pressure of the heat transfer medium is greater than 3.5 Bar, the safety valve group automatically discharges liquid and relieves pressure.

3. A temperature sensor calibration auxiliary device according to claim 1, characterized in that: The sensor mounting tube is U-shaped, the plane formed by it is horizontally distributed and arranged at the upper end of the medium circulation pipeline. The outer end of the connecting seat is provided with a chuck interface, and the temperature sensor to be measured is connected to the chuck interface through a clamp.

4. A temperature sensor calibration auxiliary device according to claim 3, characterized in that: The connecting seats are alternately distributed on both sides of the sensor mounting tube, the axis of the connecting seat passes through the axis of the sensor mounting tube, the outer ends of the connecting seats are tilted upward, and the axis of the connecting seat forms an angle of 45°-60° with the horizontal plane.

5. A temperature sensor calibration auxiliary device according to claim 4, characterized in that: The inner end of the connecting seat extends toward the inner center of the sensor mounting tube to form a closed thermal isolation sleeve, which completely isolates the heat-conducting medium from the internal space of the connecting seat. The thermal isolation sleeve is filled with thermal silicone oil; the outer wall of the thermal isolation sleeve is provided with a plurality of annular grooves.

6. A temperature sensor calibration auxiliary device according to claim 1, characterized in that: It also includes a frame and a controller arranged on the frame for adjusting the temperature of the medium in the medium circulation pipeline. The electric heater, circulation pump and electric control valve are all connected to the controller; the bottom of the frame is provided with rollers for easy movement.

7. A method for using the temperature sensor calibration auxiliary device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Install a reference temperature sensor that has passed the inspection of a third-party testing agency in the medium circulation pipeline. Remove the temperature sensor to be measured from other biopharmaceutical equipment and install it on the connecting socket. The temperature sensor to be measured is still connected to the biopharmaceutical equipment via a data cable. S2. Open the electric control valve on the return pipe and supply the heat transfer medium into the medium circulation pipeline from the liquid inlet pipe. After the air in the medium circulation pipeline is completely discharged from the return pipe, close the electric control valve. When the pressure in the medium circulation pipeline reaches the preset value, the safety valve group closes, and the entire medium circulation pipeline forms a closed loop. S3. The circulation pump is turned on and the heat transfer medium is heated by the electric heater. When the detection value of the reference temperature sensor reaches the preset temperature value t1, the controller adjusts the heat transfer medium in the medium circulation pipeline according to the value of t1, so that the heat transfer medium is stabilized at a constant temperature state of t1, which is the reference temperature value. S4. Obtain a detection value T1 of a corresponding temperature sensor to be measured from the biopharmaceutical equipment. If the detection value T1 is equal to the reference temperature value t1 or the error is within an allowable range, there is no need to calibrate the temperature sensor to be measured. If the error between the detection value T1 and the reference temperature value t1 is outside the allowable range, calibrate the temperature sensor to be measured directly on the biopharmaceutical equipment so that the detection value T1 is equal to the reference temperature value t1. S5. Repeat steps S3 and S4 several times to obtain the detection values T2, T3, ..., Tn of the corresponding temperature sensor under test under the reference temperature values t2, t3, ..., tn, compare the detection value Tn with the reference temperature value tn, and calibrate the corresponding sensor under test according to the method in step S4; S6. After the temperature sensor to be measured is calibrated, it is removed from the connection seat, cleaned, and then installed back into the corresponding biopharmaceutical equipment.

Images