HW-9 High-Precision Combustion Value Tester for Building Materials HW-9 High-Precision Combustion Value Tester for Building Materials

Main Technical Parameters

2.1Fully automated microcomputer control, dedicated energy system, enabling dual or triple control in one unit, operating independently without interference. Complete test time per sample: rapid method ≤12min, recommended method ≤14min;    Calorific value precision: ≤0.08%

2.2 Temperature resolution: ≤0.0001K

3.3 Power: ≥0.65kW

2.4 Accuracy: Test results fall within the allowable range of standard samples

2.5 Thermal capacity stability: Annual variation of thermal capacity ≤0.20%

2.6Equipped with a spiral tube isothermal system design, creating a controllable and stable internal environment for instrument testing (composed of outer bucket and bucket cover, temperature difference <0.05℃), effectively isolating the impact of external environments (such as airflow, temperature, etc.) on the inner bucket; Outer bucket water temperature fluctuation <0.05℃ throughout the day, fluctuation <0.01℃ during single sample testing, ensuring accurate and reliable test results;

2.7Outer bucket adopts semiconductor temperature control technology, integrating both cooling and heating functions, eliminating the need for supplemental cold water cooling, ensuring mutual independence of inner and outer bucket water systems. After the experiment, inner bucket water is directly discharged into the water tank, and the inflow and outflow of inner bucket water have no impact on outer bucket water temperature, further ensuring the stability of outer bucket temperature control; Using a constant volume oxygen bomb with fixed volume, unaffected by operators, eliminating changes in inner bucket water volume due to oxygen bomb volume variations, making thermal capacity more stable;

2.8Automatic oxygen bomb lifting, automatic oxygen charging and discharging, automatic oxygen charging pressure detection, automatic oxygen bomb airtightness detection, automatic inner bucket fixed water volume, automatic inner bucket water temperature adjustment, automatic experiment completion; Lifting arm press-down oxygen charging and discharging mechanism, efficient, stable, and clog-resistant; Supports automatic pipeline flushing, automatic water changing function, ensuring long-term stability of thermal capacity.

2.9 Inner bucket circulating water path system, easily detachable new stainless steel oxygen bomb combined with metal inner bucket for rapid direct constant volume, supplemented by efficient and stable new inner bucket stirring method, faster heat transfer speed of oxygen bomb, effectively shortening test time, continuous testing single sample test time ≤12min;

2.10Utilizes constant volume and quantitative devices,equipped with a semiconductor temperature-controlled constant temperature water tank, integrating both cooling and heating functions. Compared to conventional compressor-cooled water tanks, it offers more precise water temperature control, lower overall power consumption, and lower noise.

2.11 All data are measured, true, and objective, without using software correction to alter test results or fabricate data.

2.12Supports automatic oxygen bomb airtightness detection, avoiding impact of oxygen leakage on test results. Features self-diagnostic function for easy daily maintenance; Equipped with a crucible bracket for convenient handling.