Instrument Features:

1. High Automation: The instrument features automatic lifting, automatic oxygen charging, automatic gas release, and automatic oxygen bomb recognition, greatly simplifying user operations with a high degree of automation.

2. Simplified Water Circuit: The instrument uses multiple pumps and valves, ensuring reliable water circuits and easy maintenance of components.

3. Constant Water Temperature: Utilizes a chiller control system to display the set temperature of the water tank in real-time and adjust the actual temperature.

4. Water Circuit Filtration: A filter is installed at the inner cylinder drainage point to prevent impurities (such as ignition wires) from damaging the water circuit pumps and valves.

5. Visible Water Level: The water level is managed with a liquid level scale and an automatic balancing system for overflows, making it easy to monitor filling progress and replenish water after long-term experiments.

6. Oxygen Charging Pressure: The automatic oxygen charging system includes pressure monitoring for precise control.

7. Upper Cover Circulation Water: The instrument features an automatic upper cover circulation water system to ensure testing stability (customization required).

8. Diverse Testing Modes: Offers multiple testing modes to meet the needs of different customer groups.

9. Oxygen Bomb Recognition: Uses an ID card system to recognize oxygen bombs, allowing multiple bombs to be tested alternately on the same instrument, reducing idle time.

10. Stable Inner Cylinder Environment: Features water addition to the cylinder cover, a large water volume in the outer cylinder, and a residue-free drainage pipeline for the inner cylinder, ensuring a stable and reliable experimental environment.

11. Experimental Process: Checks the temperature difference between inner and outer cylinders before ignition, automatically flushes the inner cylinder and oxygen bomb after experiments, ensuring environmental stability and consistency, and promptly removes residual heat to avoid affecting subsequent experiments.

12. New General Method: Based on the classic Regnault-Pfaundler formula and combined with the instrument's experimental process and structure, a new testing method—the General Method—has been developed. This method is equivalent to the classic method, with a testing cycle of under 15 minutes and resistance to ambient temperature fluctuations of about 5°C.

Technical Parameters:

1. Temperature Resolution: 0.0001°C

2. Testing Cycle: ≤16 minutes (General Method), ≤10 minutes (Rapid Method)

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

4. Long-Term Constant Temperature Accuracy of System Water: 1°C

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

6. Precision: Relative standard deviation of heat capacity repeatability is no greater than 0.15%.

7. Accuracy: The difference between the test results of standard coal sample calorific value and the standard value falls within the uncertainty range; the repeatability limit of benzoic acid calorific value testing is no greater than 100J/g, and the difference between the measured calorific value and the standard value under specified conditions does not exceed 60J/g.

8. Calorimetric Range: 15,000J to 35,000J

9. Power Supply: 220V ± 22V, 50Hz ± 1Hz

10. Dimensions:

Main Control Unit (L×W×H): 550mm × 581mm × 550mm

Temperature Control Unit (L×W×H): 550mm × 373mm × 400mm

11. Weight: Main Control Unit 45kg, Temperature Control Unit 35kg

12. Power Consumption: Computer <300W, Calorimeter Main Unit <300W