Microcomputer Fully Automatic Building Material Combustion Calorimeter Microcomputer Fully Automatic Building Material Combustion Calorimeter Hebi Yingte Instrument Factory Combustion Calorimeter for Testing Building Materials High-Precision Building Material Calorimeter

Meets the technical specifications and requirements specified in the national standard GB/T14402-2007 "Reaction to Fire Tests for Building Materials and Products - Determination of Heat of Combustion", suitable for testing the heat of combustion of building materials. The test method specified in this standard is used to determine the gross heat of combustion of test specimens, regardless of the form of the specimen.  

II. Product Features

1. Automatically controls the outer cylinder water temperature at the set point to ensure that temperature changes do not affect cooling correction, resulting in more accurate measurements.

2. Automatically adjusts inner and outer cylinder temperatures, using a unique cooling correction system, water circulation system, and software automatic error compensation system to reduce cooling correction and improve measurement accuracy.

3. Meets the national standard requirement that "the inner cylinder is about 1K higher than the outer cylinder at the endpoint".

4. The microcomputer combustion calorimeter retains all functions of the microcomputer system, can run general software for other tasks, and simultaneously activates the calorimeter measurement system to automatically calibrate the energy equivalent (heat capacity) of the calorimetric system and measure the heat of combustion.

5. The inner cylinder of the microcomputer combustion calorimeter uses an electric stirrer with blade paddles, and the outer cylinder uses a submersible electric stirrer for more uniform and convenient stirring. The instrument uses a fuse-type cotton thread ignition method.

6. The microcomputer combustion calorimeter operates on Windows XP and above, with full Chinese prompts and human-computer interaction. It is easy to learn and use; simply follow the prompts to complete the test.

III. Performance Specifications

1. Steel cabinet with electrostatic spray coating.

2. Automatic detection of broken ignition wire and automatic ignition.

3. Automatic flameout during the test process.

4. High-precision PT100 temperature sensor for temperature measurement, with a 16-bit PLC temperature module transmitter to ensure reliability and accuracy of measurement data.

5. Audible alarm for abnormal test conditions.

6. PLC plus embedded integrated 10.2” touch screen (this function requires customization);

7. Control parameter setting and display; test status and fault display and query;

8. Temperature data acquisition and storage; screen monitoring, real-time temperature curve display;

9. Historical curve and data query;

10. Data export via USB/printable;

11. Control cabinet equipped with USB/RS232 serial port, optional external desktop/laptop computer for operation and control; high degree of automation, safe and reliable testing process, convenient operation;

12. Bomb thickness greater than 1/10 of the bomb inner diameter.

13. Lid can accommodate crucible and electronic ignition device; lid and all sealing devices can withstand internal pressure of 21 MPa.

14. Bomb inner wall made of USU304# stainless steel, resistant to corrosion from combustion products and pitting and intergranular corrosion caused by acidic substances generated during combustion.

Main Technical Parameters

1. Measurement principle: Oxygen bomb calorimetry

2. Measurement time: 12-15 min

3. Precision: RSD ≤ 0.1%

4. Temperature resolution: 0.001°C

5. Ignition time: 5 s

6. Ignition voltage: DC 12V

7. Heat capacity: approx. 10500 J/K

8. Outer water cylinder capacity: approx. 40 L

9. Inner water cylinder capacity: approx. 2.1 L

10. Operating environment: 23±2°C, relative humidity 40~60% RH

11. Power supply: AC220V±10%, 50Hz

12. Main unit power: 30W

13. Oxygen bomb: ① Capacity: 300 ml

② Oxygen filling pressure: 2.5~3.0 MPa

③ Pressure resistance: hydraulic pressure 20 MPa

④ Weight: approx. 2.5 kg

14. Calorimetric bomb capacity: (300±50) mL.

15. Calorimetric bomb pressure resistance: 21 MPa.

16. Crucible: Φ25 mm, height (14-19) mm, wall thickness 1 mm.

17. Timer: accuracy 0.5 s.

18. Maximum power consumption: 0.5 kW;

19. Ambient temperature: (10～35)°C, humidity ≤80%;

20. Instrument heat capacity: approx. 10000 J/K;

21. Heat capacity repeatability error: ≤0.2%;

22. Temperature measurement range: (4.5-42)°C;

23. Temperature resolution: 0.0001 K;