Liquid density measuring equipment and use method

Abstract

The invention relates to the technical field of physical measurement, and discloses liquid density measuring equipment and a using method, the liquid density measuring equipment comprises a measuring mechanism, and the measuring mechanism is provided with a measuring unit. According to the liquid density measuring equipment and the use method, after a power supply is started, a temperature compensation module (PT100 platinum resistance thermometer) collects current liquid temperature data and transmits the current liquid temperature data to a microprocessor as one of basic conditions for subsequent calculation; then, the control system triggers the ultrasonic transmitter to transmit a pulse signal, and the signal is captured by the receiver after a certain distance. The microprocessor records the time difference between the transmitting moment and the receiving moment, and the actual density of the liquid can be calculated by combining the actual temperature value after temperature compensation. The whole process is high in automation degree, the influence of human factors is reduced, and the accuracy of a measurement result is improved.

Description

Technical Field

[0001] The present invention relates to the field of physical measurement technology, and in particular to a liquid density measuring device and a use method thereof. Background Art

[0002] At present, a variety of technologies and instruments have been developed for liquid density measurement, such as the pycnometer method, float-type density meter, vibrating tube density meter, etc. Although these traditional methods have good performance in different application scenarios, they also have some limitations, especially in terms of measurement speed, accuracy and degree of automation, which limit their application scope. With the increasing requirements for measurement efficiency and accuracy in industrial production and scientific research, traditional density measurement methods can no longer meet the growing demand.

[0003] Common liquid density measurement technologies mainly include pycnometer method, float-type densitometer, vibrating tube densitometer, etc. Among them, the pycnometer method is a classic measurement method that calculates density by comparing the mass of the same volume of water and other liquids. This method is simple and reliable, but time-consuming and not suitable for continuous online monitoring. The float-type densitometer is designed based on the Archimedean principle. When the measured liquid level changes, the float rises and falls with the liquid level. The sensor detects the position of the float to indirectly reflect the density of the liquid. This method can achieve continuous measurement, but it is prone to blockage in liquids with high viscosity or containing solid particles. The vibrating tube densitometer uses the change in the vibration frequency of the pipeline after the liquid fills the pipeline to determine the liquid density. It has high measurement accuracy and stability, but the measurement of low-density gases may be inaccurate. These methods have their own advantages but also obvious shortcomings. The common problems of existing liquid density measurement technologies are slow measurement speed, low accuracy, and poor adaptability. Especially for those occasions where samples need to be replaced frequently or work in harsh environments, traditional methods often cannot achieve ideal measurement results. In addition, most existing equipment has complex structures and high maintenance costs, which are not suitable for large-scale promotion and use. Summary of the invention

[0004] The object of the present invention is to provide a liquid density measuring device and a method of use to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a liquid density measuring device, comprising a measuring mechanism, wherein the measuring mechanism is provided with a measuring unit; The measuring unit includes a device shell, a display screen is fixedly connected to the front side of the device shell, a start button is fixedly connected to the front side of the device shell, a placement cabin is provided on the top of the device shell, an ultrasonic transmitter is fixedly connected to the left side of the placement cabin, a receiver is fixedly connected to the right side of the placement cabin, a temperature compensation module is fixedly connected to the top of the device shell, a detection container is provided on the inner wall of the placement cabin, a microprocessor is fixedly connected to the inner wall of the rear side of the device shell, a support frame is fixedly connected to the top of the inner wall of the bottom end of the device shell, a first motor is fixedly connected to the bottom end of the support frame, an output end of the first motor passes through the support frame and is fixedly connected to a rotating rod 1, an end of the rotating rod 1 away from the first motor is fixedly connected to a rotating disk, a top of the rotating disk is fixedly connected to a rotating rod 2, and the rotating rod 2 passes through The transmission gear of the present invention is a gear which is connected with the drive gear of the driving gear through the gear box, and the gear box has a first end which is connected with the first gear and a second end which is connected with the first gear of the driving gear through the gear box.

[0006] As a preferred embodiment, the left side of the ultrasonic transmitter passes through the placement chamber and extends to the inside of the device shell, and the right side of the receiver passes through the placement chamber and extends to the inside of the device shell.

[0007] As a preferred implementation, the ultrasonic transmitter is a T-type high-frequency transducer, the receiver is an R-type, the microprocessor is an ARM Cortex-M series single-chip microcomputer, and the temperature compensation module is a PT platinum resistance thermometer.

[0008] On the other hand, the present application also discloses a method for using a liquid density measuring device, the steps of which are as follows: S1: Turn on the power to preheat, turn on the power switch, and preheat for 3 minutes; S2: Clean the test container and make sure there is no residue inside; S3: Add the liquid to be tested, add an appropriate amount of the liquid to be tested so that the liquid level is within the range of the marking line; S4: Press the start button and wait for the density value to be displayed on the display screen; S5: Measurement is completed. After the measurement is completed, turn off the power and clean the inside and outside of the container; S6: Regularly check the status of the equipment and each component to keep the equipment in good operation.

[0009] As a preferred implementation, in the S2 cleaning test container, please clean the test container carefully before use to ensure that there is no residue inside it to avoid affecting the measurement results.

[0010] As a preferred implementation, in S3, add a proper amount of the liquid to be tested into the test container, and pay attention to controlling the liquid level so that it is within the range of the marking line specified by the equipment, so that a more accurate measurement value can be obtained.

[0011] As a preferred implementation, in S4, press the start button, press the start button on the device, and wait for a while (depending on the specific device, it may take several seconds to tens of seconds) until the density value is displayed on the display screen.

[0012] As a preferred implementation, in S6, in order to ensure the long-term stable operation of the equipment, it is recommended to regularly check the status of each component of the equipment. If any abnormality is found, it should be repaired or replaced in time. At the same time, maintenance should be carried out in accordance with the requirements of the instructions to ensure that the equipment is always in good working condition.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are: First, after the power supply is turned on, the temperature compensation module (PT100 platinum resistance thermometer) first collects the current liquid temperature data and transmits it to the (microprocessor) as one of the basic conditions for subsequent calculations. Subsequently, the control system triggers the (ultrasonic transmitter) to send a pulse signal, and the (receiver) captures the signal after a certain distance. The (microprocessor) records the time difference Δt between the two moments of transmission and reception, and according to the formula ρ = K * Δt + C (K and C are constants), combined with the actual temperature value after temperature compensation, the true density of the liquid can be calculated. The whole process has a high degree of automation, reduces the influence of human factors, improves the accuracy of the measurement results, realizes a fully automated operation process, reduces the work intensity and technical threshold of operators, and has a temperature compensation function, which can maintain stable measurement performance in a wide temperature range, and the equipment has a compact structure, low cost, and easy maintenance, which is particularly suitable for small and medium-sized enterprises and research institutions.

[0014] The second motor drives the rotating shaft to rotate, and the rotating shaft drives the rotating disk to rotate, and the rotating disk drives the rotating shaft two to rotate. The rotating shaft two is set to deviate from the center of the rotating disk, and the rotating shaft two drives the shaking disk to shake. The rotating shaft two drives the driving rod to rotate while rotating, and the driving rod pushes and pulls the sliding frame, and the slide rail limits the displacement direction of the sliding frame. The sliding groove provided on the surface of the placement cabin enables the sliding frame to slide inside. The top end of the sliding frame is fixedly connected to the limiting frame, and the second motor fixedly connected to the bottom end of the limiting frame drives the rotating frame in the limiting frame and the rotation of the limiting frame drives the rotating push rod to rotate, and the rotating push rod drives the exhaust head to slide in the limiting frame. Since the displacement of the limiting frame and the rotating disk is determined by the rotating shaft two, the displacement of the limiting frame can move with the rotating disk, and the exhaust head can knock the detection container along with its movement to accelerate the discharge of bubbles.

[0015] Third, in order to further improve the robustness and reliability of the system, the present invention can add a self-calibration function on the original basis, that is, in the absence of an external liquid sample, periodic automatic calibration is performed through a built-in standard solution to ensure stability in long-term use. In addition, a wireless communication interface can be introduced to support remote data transmission and monitoring, which is convenient for integration into a larger automated control system. By adding a self-calibration function and supporting remote communication options, the stability and flexibility of the system are enhanced and the scope of application is broadened. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic top view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the internal structure of part of the present invention; Figure 4 This is a schematic diagram of the disassembly of the rear side of the present invention; Figure 5 This is a schematic diagram of the interior of the bottom side of a partial structure of the present invention; Figure 6 It is a partial structural schematic diagram of the present invention; Figure 7 This is a schematic diagram of the partial structure disassembly of the present invention; Figure 8 The present invention is a flow chart of a method for using a liquid density measuring device.

[0017] Legend: 1. Measuring mechanism; 10. Measuring unit; 11. Device housing; 12. Display screen; 13. Start button; 14. Storage compartment; 15. Temperature compensation module; 16. Detection container; 17. Ultrasonic transmitter; 18. Receiver; 19. Microprocessor; 20. First motor; 21. Support frame; 22. Turntable 1; 23. Turntable; 24. Turntable 2; 25. Shaking plate; 26. Driving rod; 27. Sliding frame; 28. Slide rail; 29. ​​Limiting frame; 30. Second motor; 31. Rotating frame; 32. Rotating push rod; 33. Exhaust head. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , the present invention provides a technical solution: a liquid density measuring device, comprising a measuring mechanism 1, wherein the measuring mechanism 1 is provided with a measuring unit 10; The measuring unit 10 includes a device housing 11, a display screen 12 is fixedly connected to the front side of the device housing 11, a start button 13 is fixedly connected to the front side of the device housing 11, a placement chamber 14 is provided on the top of the device housing 11, an ultrasonic transmitter 17 is fixedly connected to the left side of the placement chamber 14, a receiver 18 is fixedly connected to the right side of the placement chamber 14, a temperature compensation module 15 is fixedly connected to the top of the device housing 11, a detection container 16 is arranged on the inner wall of the placement chamber 14, a microprocessor 19 is fixedly connected to the inner wall of the rear side of the device housing 11, a support frame 21 is fixedly connected to the top of the inner wall of the bottom end of the device housing 11, a first motor 20 is fixedly connected to the bottom end of the support frame 21, an output end of the first motor 20 passes through the support frame 21 and is fixedly connected to a rotating rod 1 22, an end of the rotating rod 1 22 away from the first motor 20 is fixedly connected to a rotating disk 23, a top of the rotating disk 23 is fixedly connected to a rotating rod 24, and a rotating rod 25 is fixedly connected to the rotating rod 26. A shaking plate 25 is fixedly connected to the device housing 11, a driving rod 26 is rotatably connected to the surface of the rotating rod 24, and a sliding frame 27 is rotatably connected to the end of the driving rod 26 away from the rotating rod 24. The top of the sliding frame 27 is fixedly connected to the limiting frame 29, and the bottom of the limiting frame 29 is fixedly connected to the second motor 30. The output end of the second motor 30 passes through the limiting frame 29 and is fixedly connected to the rotating frame 31. An eccentric rod is fixedly connected to the inner wall of the rotating frame 31, and a rotating push rod 32 is rotatably connected to the surface of the eccentric rod. An exhaust head 33 is rotatably connected to the end of the rotating push rod 32 away from the eccentric rod. A slide rail 28 is fixedly connected to the bottom end of the device housing 11, and the inner wall of the slide rail 28 is slidably connected to the sliding frame 27. The surface of the exhaust head 33 is slidably connected to the limiting frame 29. The upper and lower ends of the rotating frame 31 are rotatably connected to the limiting frame 29. A slide groove is provided on the inner wall of the placement cabin 14, and the surface of the sliding frame 27 is slidably connected to the slide groove.

[0020] After starting the power supply, the temperature compensation module 15 first collects the current liquid temperature data and transmits it to the microprocessor 19 as one of the basic conditions for subsequent calculations. Subsequently, the control system triggers the ultrasonic transmitter 17 to send a pulse signal, and the receiver 18 captures the signal after a certain distance. The microprocessor records the time difference Δt between the emission and reception moments, and combines the actual temperature value after temperature compensation to calculate the true density of the liquid. The first motor 20 drives the rotating rod 1 22 to rotate, the rotating rod 1 22 drives the turntable 23 to rotate, and the turntable 23 drives the rotating rod 24 to rotate. The rotating rod 24 is set to deviate from the center of the turntable 23. The rotating rod 24 drives the shaking plate 25 to shake. The rotating rod 24 drives the driving rod 26 to rotate while rotating. The driving rod 26 pushes and pulls the sliding frame 27. The slide rail 28 limits the displacement direction of the sliding frame 27. The slide groove opened on the surface of the placement chamber 14 allows the sliding frame 27 to slide inside. The top of the moving frame 27 is fixedly connected to the limit frame 29, and the second motor 30 fixedly connected to the bottom end of the limit frame 29 drives the rotating frame 31 in the limit frame 29 and the rotation connected to the limit frame 29 to rotate. The rotation of the rotating frame 31 drives the rotating push rod 32 to rotate, and the rotating push rod 32 drives the exhaust head 33 to slide in the limit frame 29. Since the displacement of the limit frame 29 and the turntable 23 is determined by the second rotating rod 24, the displacement of the limit frame 29 can move with the turntable 23, and the exhaust head 33 can knock on the detection container 16 along with its movement to accelerate the discharge of bubbles. The first motor, the second motor and the internal circuits of the display are existing technologies.

[0021] The left side of the ultrasonic transmitter 17 passes through the placement chamber 14 and extends into the device housing 11 , and the right side of the receiver 18 passes through the placement chamber 14 and extends into the device housing 11 .

[0022] The model of the ultrasonic transmitter 17 is a T40-60 high frequency transducer, the model of the receiver 18 is an R40-50, the model of the microprocessor 19 is an ARM Cortex-M series single chip microcomputer, and the model of the temperature compensation module 15 is a PT100 platinum resistance thermometer.

[0023] The ultrasonic transmitter 17 uses a high-frequency transducer of model T40-60, which has high sensitivity and fast response; the receiver 18 uses a matching R40-50 model to ensure good receiving performance. The temperature compensation module 15 uses a high-precision PT100 temperature compensation module with a resolution of up to ±0.1°C. The microprocessor 19 is recommended to use an ARM Cortex-M series single-chip microcomputer, which has strong computing power and low power consumption and is suitable for embedded system development. The internal circuits of the ultrasonic transmitter 17, the receiver 18, the microprocessor 19 and the temperature compensation module 15 are all existing technologies.

[0024] On the other hand, Figure 5As shown, the present invention provides a technical solution: a method for using a liquid density measuring device, comprising the following steps: S1: turning on the power supply for preheating, turning on the power switch, and preheating for 3 minutes; S2: Clean the test container and make sure there is no residue inside; S3: Add the liquid to be tested, add an appropriate amount of the liquid to be tested so that the liquid level is within the range of the marking line; S4: Press the start button and wait for the density value to be displayed on the display screen; S5: Measurement is completed. After the measurement is completed, turn off the power and clean the inside and outside of the container; S6: Regularly check the status of the equipment and each component to keep the equipment in good operation.

[0025] In the S2 clean test container, before use, please clean the test container carefully to ensure that there is no residue inside it, so as not to affect the measurement results.

[0026] Initial rinse: Rinse the test container with distilled or deionized water to ensure that there is no obvious residue inside. Rinse several times until the inside of the container looks clean. Thoroughly rinse: Rinse the test container thoroughly with distilled or deionized water to ensure that all detergents and residues are washed away. Rinse several times until the water in the container is clear and transparent. Dry the inside and outside of the test container with a clean soft cloth or paper towel. Alternatively, place the test container upside down on a clean rack and let it dry naturally. Finally, carefully check the inner wall and bottom of the test container to ensure that there is no residue or water stains. If any residue is found, repeat the above cleaning steps until the container is completely clean.

[0027] Add the liquid to be tested in S3, add an appropriate amount of the liquid to be tested into the test container, and pay attention to controlling the liquid level so that it is within the range of the mark line specified by the equipment, so that more accurate measurement values ​​can be obtained.

[0028] Slowly pour the liquid to be tested into the test container, and make sure that the liquid level is within the range of the marking lines specified by the device. Usually, the device will mark the minimum and maximum liquid level lines on the test container. Make sure that the liquid level is between these two lines. Too much or too little liquid may affect the accuracy of the measurement results. Avoid bubbles. When pouring liquid, try to avoid bubbles. If there are bubbles, you can start the first motor to make the shaking plate shake the container to help the bubbles escape. The presence of bubbles will affect the propagation of ultrasonic signals, thereby affecting the measurement results. In S4 Press Start Button, press the start button on the device and wait for a while (depending on the specific device, it may take several seconds to tens of seconds) until the density value is displayed on the display screen.

[0029] During the measurement process, do not operate the equipment frequently or move the test container to avoid affecting the measurement results. Read the results and ensure that the density value is accurately read from the display screen after the measurement is completed. Record the data. It is recommended to record the measurement results for subsequent analysis or archiving.

[0030] In S6, in order to ensure the long-term stable operation of the equipment, it is recommended to regularly check the status of each component of the equipment. If any abnormality is found, it should be repaired or replaced in time. At the same time, maintenance should be carried out in accordance with the requirements of the manual to ensure that the equipment is always in good working condition.

[0031] Through regular maintenance and care, you can extend the service life of the equipment and ensure that it is always in optimal working condition, thereby obtaining accurate and reliable measurement results.

[0032] Working principle: This technology provides a liquid density measuring device and a method of use. The device consists of an ultrasonic transmitter 17, a receiver 18, a temperature compensation module 15, and a microprocessor 19. The ultrasonic transmitter 17 and the receiver 18 are respectively arranged at the two ends of the placement chamber 14. The placement chamber 14 is provided with a detection container 16, and the detection container is filled with the liquid to be measured. The control circuit sends an electrical signal to the ultrasonic transmitter 17 to generate an ultrasonic pulse, which is converted into an electrical signal after being transmitted to the receiver 18 through the liquid. The microprocessor 19 collects the signal and calculates the time it takes for the ultrasonic wave to pass through the liquid. Considering that the density of the same substance will change at different temperatures, the temperature compensation module 15 is introduced to monitor the liquid temperature in real time and obtain the final density value through software correction. After starting the power supply, the temperature compensation module 15 first collects the current liquid temperature data and transmits it to the microprocessor 19 as one of the basic conditions for subsequent calculations. Subsequently, the control system triggers the ultrasonic transmitter 17 to send a pulse signal, and the receiver 18 captures the signal after a certain distance. The microprocessor 19 records the time difference Δt between the emission and reception moments, and according to the formula ρ = K * Δt + C (K and C are constants), combined with the actual temperature value after temperature compensation, the true density of the liquid can be calculated. The whole process has a high degree of automation, which reduces the influence of human factors and improves the accuracy of the measurement results. The ultrasonic transmitter 17 uses a high-frequency transducer model T40-60 with high sensitivity and fast response; the receiver 18 selects a matching R40-50 model to ensure good receiving performance. The temperature compensation module 15 uses a high-precision PT100 temperature compensation module with a resolution of up to ±0.1°C. The microprocessor 19 is recommended to use an ARM Cortex-M series microcontroller, which has strong computing power and low power consumption, and is suitable for embedded system development; In addition, after the power supply of the device is turned on, the first motor 20 drives the rotating rod 1 22 to rotate, the rotating rod 1 22 drives the rotating disk 23 to rotate, the rotating disk 23 drives the rotating rod 24 to rotate, the rotating rod 24 is set to deviate from the center of the rotating disk 23, the rotating rod 24 drives the shaking disk 25 to shake, and the rotating rod 24 drives the driving rod 26 to rotate while rotating, the driving rod 26 pushes and pulls the sliding frame 27, and the slide rail 28 limits the displacement direction of the sliding frame 27. The sliding groove provided on the surface of the placement chamber 14 allows the sliding frame 27 to slide inside, and the top of the sliding frame 27 The end is fixedly connected to a limit frame 29, and a second motor 30 fixedly connected to the bottom end of the limit frame 29 drives a rotating frame 31 in the limit frame 29 and rotatably connected to the limit frame 29 to rotate. The rotation of the rotating frame 31 drives a rotating push rod 32 to rotate, and the rotating push rod 32 drives an exhaust head 33 to slide in the limit frame 29. Since the displacement of the limit frame 29 and the turntable 23 is determined by the rotating rod 24, the displacement of the limit frame 29 can move with the turntable 23, and the exhaust head 33 can knock on the detection container 16 as it moves to accelerate the discharge of bubbles.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid density measuring device, comprising a measuring mechanism (1), characterized in that: The measuring mechanism (1) is provided with a measuring unit (10); The measuring unit (10) comprises a device housing (11), a display screen (12) is fixedly connected to the front side of the device housing (11), a start button (13) is fixedly connected to the front side of the device housing (11), a storage compartment (14) is provided on the top of the device housing (11), an ultrasonic transmitter (17) is fixedly connected to the left side of the storage compartment (14), a receiver (18) is fixedly connected to the right side of the storage compartment (14), a temperature compensation module (15) is fixedly connected to the top of the device housing (11), and an inner wall of the storage compartment (14) is provided with a temperature compensation module (15). A detection container (16) is arranged, a microprocessor (19) is fixedly connected to the inner wall of the rear side of the device housing (11), a support frame (21) is fixedly connected to the top of the inner wall of the bottom end of the device housing (11), a first motor (20) is fixedly connected to the bottom end of the support frame (21), an output end of the first motor (20) passes through the support frame (21) and is fixedly connected to a first rotating rod (22), an end of the first rotating rod (22) away from the first motor (20) is fixedly connected to a rotating disk (23), a top end of the rotating disk (23) is fixedly connected to a second rotating rod (24), and the rotating rod The second (24) penetrating device housing (11) is fixedly connected to a shaking plate (25); the surface of the second rotating rod (24) is rotatably connected to a driving rod (26); one end of the driving rod (26) away from the second rotating rod (24) is rotatably connected to a sliding frame (27); the top end of the sliding frame (27) is fixedly connected to a limiting frame (29); the bottom end of the limiting frame (29) is fixedly connected to a second motor (30); the output end of the second motor (30) penetrates the limiting frame (29) and is fixedly connected to a rotating frame (31); the inner wall of the rotating frame (31) is fixedly connected to an eccentric The eccentric rod is rotatably connected to a rotating push rod (32) on the surface, and an end of the rotating push rod (32) away from the eccentric rod is rotatably connected to an exhaust head (33). The bottom end of the device housing (11) is fixedly connected to a slide rail (28), the inner wall of the slide rail (28) is slidably connected to a sliding frame (27), the surface of the exhaust head (33) is slidably connected to a limit frame (29), the upper and lower ends of the rotating frame (31) are rotatably connected to the limit frame (29), and the inner wall of the placement chamber (14) is provided with a slide groove, and the surface of the sliding frame (27) is slidably connected to the slide groove.

2. A liquid density measuring device according to claim 1, characterized in that: The left side of the ultrasonic transmitter (17) passes through the placement chamber (14) and extends into the interior of the device housing (11), and the right side of the receiver (18) passes through the placement chamber (14) and extends into the interior of the device housing (11).

3. A liquid density measuring device according to claim 1, characterized in that: The model of the ultrasonic transmitter (17) is a T40-60 high-frequency transducer, the model of the receiver (18) is an R40-50, the model of the microprocessor (19) is an ARM Cortex-M series single-chip microcomputer, and the model of the temperature compensation module (15) is a PT100 platinum resistance thermometer.

4. A method for using a liquid density measuring device, applied to a liquid density measuring device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1: Turn on the power to preheat, turn on the power switch, and preheat for 3 minutes; S2: Clean the test container and make sure there is no residue inside; S3: Add the liquid to be tested, add an appropriate amount of the liquid to be tested so that the liquid level is within the range of the marking line; S4: Press the start button and wait for the density value to be displayed on the display screen; S5: Measurement is completed. After the measurement is completed, turn off the power and clean the inside and outside of the container; S6: Regularly check the status of the equipment and each component to keep the equipment in good operation.

5. The method for using a liquid density measuring device according to claim 4, characterized in that: In the S2 clean test container, before use, please clean the test container carefully to ensure that there is no residue inside it, so as not to affect the measurement results.

6. The method for using a liquid density measuring device according to claim 4, characterized in that: Add the liquid to be tested in S3, add an appropriate amount of the liquid to be tested into the test container, and pay attention to controlling the liquid level so that it is within the range of the mark line specified by the equipment, so that more accurate measurement values ​​can be obtained.

7. The method for using a liquid density measuring device according to claim 4, characterized in that: In S4 Press Start Button, press the start button on the device and wait for a while (depending on the specific device, it may take several seconds to tens of seconds) until the density value is displayed on the display screen.

8. The method for using a liquid density measuring device according to claim 4, characterized in that: In S6, in order to ensure the long-term stable operation of the equipment, it is recommended to regularly check the status of each component of the equipment. If any abnormality is found, it should be repaired or replaced in time. At the same time, maintenance should be carried out in accordance with the requirements of the manual to ensure that the equipment is always in good working condition.

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