Automatic plaster softening point tester

Introduction to YJ-2102H Fully Automatic Plaster Softening Point Tester:

This instrument is designed in accordance with the requirements of the General Rule 2102 "Method for Determination of Softening Point of Plasters" in the 2020 Edition of the Chinese Pharmacopoeia Part IV. It is used to measure the temperature at which a plaster softens when heated under specified conditions, specifically the temperature when the plaster sags by 25mm due to heating. This temperature is used to assess the maturity of the plaster and can indirectly reflect its viscosity. The instrument is suitable for use by various plaster manufacturers, drug inspection institutes, and related institutions.

I. Main Technical Features

1. The YJ-2102H Fully Automatic Plaster Softening Point Tester adopts technologies such as computer intelligent control, automatic laser detection, liquid crystal touch screen human-machine interface, and lead screw stepper motor lifting. It features linear temperature rise, uniform bath solution stirring, and automatic sample testing. It is a plaster softening point tester with high automation, fast and convenient testing, and accurate and reliable test results.

2. The instrument heats both the solution medium in the beaker and the plaster. A magnetic stirrer is used to ensure uniform temperature inside the beaker. The controller uses an interpolation algorithm to control the output, making the medium rise linearly at a rate of 1.0-1.5℃ per minute. During the heating process, the plaster in the test ring begins to soften slowly. When the softening temperature is reached, the plaster in the sample ring slowly descends in a water-drop shape under the gravity of the steel ball. The average temperature when the plasters in both sample rings descend and touch the lower baffle is taken as the softening point temperature of the plaster.

3. The instrument mainly consists of a chassis bracket, touch screen human-machine interface, lead screw lifting system, heating and temperature adjustment system, laser detection system, magnetic stirring system, and other components.

4. To facilitate test operation and the smooth lifting of components inside the beaker, a test platform is designed. The test components are suspended and positioned on the test platform. The lead screw drives the test platform and components to descend smoothly with precise positioning, ensuring that the light beam of the through-beam laser is close to the upper side of the lower baffle.

5. The test process features animated simulation display and touch operation, making the human-machine interface more intuitive and convenient.

6. Temperature control uses a slope interpolation algorithm for precise temperature rise, program control, and real-time temperature monitoring.

7. The split-type magnetic stirrer adopts infinite speed regulation, ensuring more uniform temperature.

8. The through-beam laser automatically detects and judges sample descent, with strong anti-interference ability and high response sensitivity.

II. Main Technical Indicators and Parameters

1. Measurement Range

A. For samples with a softening point below 80℃: 5℃～80℃ (using distilled water).

B. For samples with a softening point above 80℃: 32℃～162℃ (using glycerol).

2. Temperature Resolution: 0.1℃ (deviation is correctable).

3. Heating Tube Power: 700W.

4. Heating Slope: Heating rate stabilized at 1.0-1.5℃/min.

5. Beaker Dimensions: Diameter 110mm, height 130mm.

6. Number of Measured Samples: 2 samples can be measured simultaneously.

7. Stirrer: Magnetic stirring with continuously adjustable stirring speed.

8. Test Result Processing: Stores 200 sets of data.

9. Stored data can be displayed on the liquid crystal screen or transferred and viewed via USB flash drive (in .csv format).

10. A miniature printer is optional for printing results.

11. Communication Interface: RS-485 communication interface, ModBus protocol.

12. External Dimensions: 390mm×300mm×575mm (length×width×height).

13. Working Power Supply: 220±10% VAC/50Hz.

14. Total Power: Maximum 800W.

15. Net Weight of the Whole Instrument: 12.0Kg.

16. Operating Environment:

A. Temperature: 15℃～35℃, relatively stable, with no obvious air convection.

B. Humidity: ≤85%.