The instrument features a stable and reliable automatic quantitative system, utilizing a high-borosilicate glass integrated quantitative water cup to ensure the inner cylinder water volume remains consistent across all tests, providing stability and reliability. It incorporates a specially designed oxygen bomb with strong pressure resistance and radio frequency identification (RFID) functionality. The outer cylinder employs a compressor-based refrigeration control method to ensure long-term stability of the water volume.

Technical Parameters:

1. Temperature Resolution: 0.0001°C

2. Test Cycle: ≤16 minutes (conventional method), ≤10 minutes (rapid method)

3. Constant Temperature Accuracy of Outer Cylinder Water for Single Experiment: 0.10°C

4. Long-Term Experiment System Water Temperature Stability Accuracy: 1°C

5. Sample Weight: Determined based on the calorific value range; coal samples commonly use 1g

6. Precision: Relative standard deviation of heat capacity repeatability not exceeding 0.15%

7. Accuracy: Difference between standard coal sample calorific value test results and standard value falls within the uncertainty range; repeatability limit of benzoic acid calorific value test not exceeding 100J/g, with the difference between measured calorific value and standard value under specified conditions not exceeding 60J/g

8. Calorific Measurement Range: 15,000J to 35,000J

9. Power Supply: 220V±22V, 50Hz±1Hz