The Hidden Killer of Calorimeter Data Stability
Manual oxygen charging is not only time-consuming but also a significant variable affecting data stability.
According to GB/T 213 “Method for Determining the Calorific Value of Coal,” the oxygen bomb filling pressure must be maintained between 2.8–3.0 MPa. However, during manual operation, this pressure value relies entirely on the operator’s experience and tactile judgment—factors like whether the pressure gauge needle is aligned, whether the pressure holding time is sufficient, or whether the filling speed is too fast all affect the final filling outcome.
Laboratory technicians have reported discrepancies in data between morning and afternoon measurements of the same batch of samples, with inconsistent results. Tracing the root cause often reveals subtle variations in oxygen charging pressure as the culprit.
Based on deep insights into these pain points, the HT-RL800 fully automatic calorimeter incorporates “automatic oxygen charging” as a core feature, achieving a comprehensive leap in testing efficiency.
1. Intelligent Oxygen Charging System: Precise, Rapid, and Safe
• Automatic Pressure Control: Maintains charging pressure at 2.8–3.0 MPa, exceeding ASTM D5865 standard requirements
• Self-Testing for Air Tightness: Automatically verifies oxygen bomb seal integrity post-charging to eliminate leakage risks
• Overpressure Protection: Automatically halts charging at 3.2 MPa to ensure operational safety
• Single oxygenation cycle completes in just 15 seconds, over 3 times faster than manual methods
• Average single-sample test time <18 minutes; rapid mode achieves 10 minutes
• Capable of continuous 24-hour operation
2. Precise and Reliable Data Assurance
• Temperature resolution of 0.0001°C using high-precision platinum resistance temperature sensors
• Precision with RSD ≤ 0.1%, exceeding the national standard requirement of ≤ 0.20%
Built-in cooling correction model compliant with ASTM D5865, automatically compensating for heat exchange effects
3. Multi-Standard Compliance for Globally Recognized Data
The HT-RL800 is rigorously designed to meet GB/T 213 standards while also satisfying international requirements such as ASTM D5865. Test reports achieve mutual recognition in both domestic and international markets.
What determines data accuracy is often not grand technological principles, but seemingly insignificant details like oxygen filling.
The HT-RL800 fully automatic calorimeter liberates laboratory technicians from repetitive tasks by meticulously refining this “oxygen filling” detail, achieving a qualitative leap in testing efficiency.
If you too wish to eliminate the hassle of manual oxygen filling in your lab, contact our engineers for a tailored solution.
