Fully automatic surface/interface tension meter

JYW-200BMicro controlled fully automatic surface and interface tension meter

Fully automatic surface tension meterAdopting SY-T5370 "Determination of Surface and Interface Tension", GBT 18396-2001 "Determination of Surface Tension of Natural Latex by Ring Method", GBT6541-86 "Determination of Oil Water Interface Tension of Petroleum Products (Circular Ring Method)", "QB-T 1323-91 Determination of Surface Tension of Detergents by Circular Pulling Liquid Film Method"Designed according to standards, it can adapt to various liquid surface tension and interfacial tension tests, display test results immediately after testing, and automatically calculate the average of multiple test results. It is a high-performance and cost-effective instrument for measuring surface and interfacial tension. The testing software has functions such as automatic drawing of test curves, automatic zeroing, automatic ASTM D-971 formula correction, saving test results, and generating test reports. The interface is intuitive, the operation is simple, and it is easy to learn and use.

Characteristics of the lower computer:

1. The ring test method adopts a scientific tension value correction method,namelyCalibration of standard weights and calibration of reference materials.① To eliminate errors caused by factors such as the shape and contamination of platinum rings in the ring test, gravity method is no longer used for correction. Instead, two standard substances are used for correction. When the shape of the platinum ring changes or it is contaminated over time, resulting in test errors, it can be restored to normal by using standard substances for correction without the need to replace expensive platinum rings.②Standard weight calibration method, this is the calibration method for interface tension related standard specifications. Equipment calibration is carried out according to this calibration method, and a testing certificate is issued.

2. Adopting an integrated molding shell and argon arc welding process, the entire support structure is not fastened with screws, ensuring the stability of the support structure. (In addition, observation gold and instruments *)

3. The internal screw structure is driven by a low-noise, low-speed DC motor, and the lifting shaft is precisely matched with oil-free self-lubricating bearings. During the testing process, the vibration is minimal and there is no shaking. The reliability and durability are greatly improved, while ensuring testing accuracy.

4. Using a 32-bit ARM high-end microcontroller control, the operation speed is fast and the accuracy is high. A specially designed filtering algorithm is also used to ensure the stability and accuracy of the displayed values.

5. Adopting the high-end 24 bit AD converter from American ADI company, the conversion speed is fast and the force value acquisition is more accurate.

6. The improved torque wire lever structure makes the motion trajectory of the sensor core as close to a straight line as possible, ensuring the linearity of the test.

7. Adopting domestically produced high-precision technologyLVDT displacement sensor has good linearity, sensitive output signal, accurate impedance matching, and ensures the repeatability accuracy of testing

8. The instrument has an automatic stop function, which can be set to automatically stop when testing surface tension. After the test is completed, the lifting platform will automatically stop moving and display the tension value.

9The automatic average function can automatically average and display multiple test results, reducing the workload and intensity of operators.

10. The lower computer is equipped with a digital LCD screen and keyboard, which can be directly operated through the lower computer, and the operation status is directly reflected to the computer end, achieving bidirectional control between the computer and the lower computer. Without the computer, the lower computer can also work independently.

Software features:

1. It can display real-time force value change curves, which are used to analyze the changes in interface or surface properties of liquids during the stretching process by platinum rings. The curve is saved in the form of an image and can be printed together with the test report, or independently copied and printed.

2. Automatic ASTM D-971 formula correction can be set, and the actual tension value will be displayed immediately after the test is completed, without the need for manual conversion.

3. Automatically record and display the average result of multiple tests on each sample.

4. The multiple test data and curve graphs of each sample are saved as a whole.

5. Generate and print test report function. The test report can choose to include a curve graph or no curve graph.

Technical parameters:

1. Measurement range: 0-200.0mN/m

2. Resolution: 0.01mN/m

3. Indication accuracy: ≤± 1% FS

4. Repetitive error: ≤± 1% FS

5. Sample stage travel:>35mm

6. Sample stage movement speed: approximately 15mm/min

7. Whole machine weight: 7.5Kg

8. Power supply: 220V 50HZ

9. Dimensions: 300 × 300 × 400 (mm)