Cone Calorimeter of Fire Testing Equipment Machine Instrument for Heat Release Rate of Standard ISO5660

Cone Calorimeter

The Cone Calorimeter is the most significant bench scale instrument in the field of fire testing.
Heat release is the key measurement required to assess the fire development of materials and products. Traditionally it has been very difficult to measure and more recently full scale testing of items (e.g. furniture) has been possible by burning these articles and measuring the evolved heat using a technique called oxygen depletion calorimetry.

In the early 1980's workers at NIST (formerly NBS), in the USA, decided to produce an improved bench scale heat release test which would overcome the deficiencies of existing small scale heat release tests which relied on the measurement of the outflow enthalpy of enclosed systems. Oxygen depletion calorimetry was identified as the best measurment method. This is based on the empirical observation that heat released by burning materials is directly proportional to the quantity of oxygen used in the combustion process. The instrument was called a Cone Calorimeter. This name was derived from the shape of the truncated conical heater that is used to irradiate the test specimen with fluxes up to 100 kW/m2 in the test.

Technology data:

1.) 19inch standard instrument frame,17inch touchable screen pc insert

2.) cone heater powering rating:5000w,heat output rate:0~100kw/m2

3.) in the range of 50*50mm in the center surface of expose test sample ,center irradiation error no more than +-2%;

4.) sample size:100mm*100mm*50mm

5.) weight range:0~2000g;precision:0.1g;

6.) ignition system with safe cut device high pressure spark generator ,automatic positioning

7.) clockwise magnetic oxygen analyzer ,adopt pressure change of clockwise magnetic to measure the oxygen density

8.) density range:0-25%,T90<1.5S,zero drift:<0.5%month,measure data deviation<0.5%month,

9.) non-dispersion infrared co and co2 analyzer:co:0~1%;co2:0~10%;

10.) smoke analyzer use laser system test smoke density,and this system was made up of photoelectricity two-electrode valve,0.5mv He-Ne laser,main graphics detector and auxiliary graphics detector .

11.) exhaust system was made up of fan,hottle,air intake and exhaust tube of fan and orifice meter.exhaust gas flow 0~50g/s can be adjusted,precision 0.1g/s.

12.) ring sampler need to be located in the air take tube at distance of 685mm against hottle ,need to be 12 holes existed in the sampler in order to homogeneous air flow component.

13.) exhaust gas flow need to be measured by the differencial pressure of side of hole plate above the fans at the distance of 350mm,the inner diameter of hole plate is 57mm+-1mm;

14.) the temperature of air flow is tested by armored thermocouple with closed node of diameter 1.6mm,thermocouple need to be located in 100 mm above the orifice plate;

15.) gas sampling system including ring sampler ,sampling pump,filter,cold trap,waste water exhaust,water filter and co2 filter;

16.) cold trap:0~5 degree,diaphragm pump,flow rate :261/min,vacuum degree:700mm Hg,pressure:2.5bar

17.) temperature controller instrument can be automatically adjust in 0-1000℃,both setted resolution and temperature control precision is +-2degree,and supply automatic cold end compensator with thermocouple

18.) use carton foil type heat flow meter ,design range 0~100k w/m2,diameter of radiation receiving target is

12.5mm,surface with durable dull black coating.radiation receiving target is cooling water method. Precision

of heat flow meter is 3%,repeatability is +0-0.5%,attached a adjust report can be date back to NIST.

19.) supply portable cooling water system.when use heat flow meter ,users do not need to tap and equipped with water.

20.) In order to calibrate the response of the whole test system, a square hole with a square hole and a square yellow copper tube is used as the calibration burner for measuring the C- coefficient values.

21.) Data acquisition system should be able to record the oxygen analyzer, orifice meter, thermocouple and other instruments of the output.

22.) Equipped with software operating system, the test results include: heat release rate, gas flow rate, C coefficient, sample time and time, total oxygen consumption, total smoke, mass loss rate, total heat release, effective combustion heat, carbon dioxide emissions and carbon dioxide emissions.

Soft ware instruction of cone calorimeter:

1.) Set in order to calibrate the sensor, including the oxygen analyzer, carbon dioxide analyzer, carbon monoxide analyzer, micro pressure difference sensor, smoke density measurement system, weighing device, mass flow control single or double point calibration, in order to obtain the best linear;

2.) C- coefficient calibration, the software can automatically set the C coefficient measurement of gas flow, such as 1KW, 3KW or 5KW, the computer system automatically calculates the ISO 5660 C coefficient and the average C coefficient, and can save the record;

3.) The software can automatically generate the C- coefficient log, which is convenient for the user to view the history of the cone calorimeter, and to identify the accuracy and stability of the system;

4.) The system can automatically calculate the delay time of the oxygen analyzer, the carbon dioxide analyzer and the carbon monoxide analyzer, which is convenient for the synchronous calculation

5.) Status check interface, the working state of the various sensor components of the instrument can be clear at a glance;

6.) Can record the work value of each sensor, including micro pressure difference sensor, chimney temperature, oxygen analyzer, carbon dioxide analyzer, carbon monoxide analyzer;

7.) The report template is EXCELL format, which can display graphics and numerical model.

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