ISO 5660-1:2015
Reaction-to-fire tests — Heat release, smoke production and mass loss rate — Part 1: Heat release rate (cone calorimeter method) and smoke production rate (dynamic measurement)
ISO 5660-1:2015 specifies a method for assessing the heat release rate and dynamic smoke production rate of specimens exposed in the horizontal orientation to controlled levels of irradiance with an external igniter. The heat release rate is determined by measurement of the oxygen consumption derived from the oxygen concentration and the flow rate in the combustion product stream. The time to ignition (sustained flaming) is also measured in this test.
The dynamic smoke production rate is calculated from measurement of the attenuation of a laser light beam by the combustion product stream. Smoke obscuration is recorded for the entire test, regardless of whether the specimen is flaming or not.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Principle
6 Apparatus
6.1 General
6.2 Cone-shaped radiant electrical heater
6.3 Radiation shield
6.4 Irradiance control
6.5 Weighing device
6.6 Specimen holder
6.7 Retainer frame
6.8 Exhaust gas system with flow measuring instrumentation
6.9 Gas sampling apparatus
6.10 Ignition circuit
6.11 Ignition timer
6.12 Oxygen analyser
6.13 Heat flux meters
6.14 Calibration burner
6.15 Data collection and analysis system
6.16 Optional side screens
6.17 Smoke obscuration measuring system
6.18 Smoke system thermocouple
6.19 Optical filters
7 Suitability of a product for testing
7.1 Surface characteristics
7.2 Asymmetrical products
7.3 Materials of short burning time
7.4 Composite specimens
7.5 Dimensionally unstable materials
7.6 Materials that require testing under compression
8 Specimen construction and preparation
8.1 Specimens
8.2 Conditioning of specimens
8.3 Preparation
8.3.1 Specimen wrapping
8.3.2 Specimen preparation
8.3.3 Preparing specimens of materials that require testing under compression
9 Test environment
10 Calibration
10.1 Preliminary calibrations
10.1.1 General
10.1.2 Irradiance control system response characteristics
10.1.3 Weighing device response time
10.1.4 Weighing device output drift
10.1.5 Oxygen analyser delay and response times
10.1.6 Oxygen analyser output noise and drift
10.1.7 Effect of side screens
10.2 Operating calibrations
10.2.1 General
10.2.2 Weighing device accuracy
10.2.3 Oxygen analyser
10.2.4 Heat release rate calibration
10.2.5 Heater calibration
10.3 Smoke meter calibration
10.3.1 Calibration with neutral density filters
10.3.2 Calibration before test
10.4 Less frequent calibrations
10.4.1 Operating heat flux meter calibration
10.4.2 Linearity of heat release rate measurements
10.4.3 Accuracy of calibration burner flow meter
11 Test procedure
11.1 General precautions
11.2 Initial preparation
11.3 Procedure
12 Calculations
12.1 General
12.2 Calibration constant for oxygen consumption analysis
12.3 Heat release rate
12.4 Exhaust duct flow rate
12.5 Mass loss rate
12.6 Smoke obscuration
13 Test report
Annex A (informative) Commentary and guidance notes for operators
Annex B (informative) Supplementary calculations — Normalization to the mass loss rate of the specific extinction area of specimen
Annex C (informative) Resolution, precision and bias
Annex D (informative) Mass loss rate and effective heat of combustion
Annex E (informative) Testing in the vertical orientation
Annex F (informative) Calibration of the working heat flux meter
Annex G (informative) Calculation of heat release with additional gas analysis
Annex H (informative) Calculation of Effective Critical Heat Flux for Ignition
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Principle
6 Apparatus
6.1 General
6.2 Cone-shaped radiant electrical heater
6.3 Radiation shield
6.4 Irradiance control
6.5 Weighing device
6.6 Specimen holder
6.7 Retainer frame
6.8 Exhaust gas system with flow measuring instrumentation
6.9 Gas sampling apparatus
6.10 Ignition circuit
6.11 Ignition timer
6.12 Oxygen analyser
6.13 Heat flux meters
6.14 Calibration burner
6.15 Data collection and analysis system
6.16 Optional side screens
6.17 Smoke obscuration measuring system
6.18 Smoke system thermocouple
6.19 Optical filters
7 Suitability of a product for testing
7.1 Surface characteristics
7.2 Asymmetrical products
7.3 Materials of short burning time
7.4 Composite specimens
7.5 Dimensionally unstable materials
7.6 Materials that require testing under compression
8 Specimen construction and preparation
8.1 Specimens
8.2 Conditioning of specimens
8.3 Preparation
8.3.1 Specimen wrapping
8.3.2 Specimen preparation
8.3.3 Preparing specimens of materials that require testing under compression
9 Test environment
10 Calibration
10.1 Preliminary calibrations
10.1.1 General
10.1.2 Irradiance control system response characteristics
10.1.3 Weighing device response time
10.1.4 Weighing device output drift
10.1.5 Oxygen analyser delay and response times
10.1.6 Oxygen analyser output noise and drift
10.1.7 Effect of side screens
10.2 Operating calibrations
10.2.1 General
10.2.2 Weighing device accuracy
10.2.3 Oxygen analyser
10.2.4 Heat release rate calibration
10.2.5 Heater calibration
10.3 Smoke meter calibration
10.3.1 Calibration with neutral density filters
10.3.2 Calibration before test
10.4 Less frequent calibrations
10.4.1 Operating heat flux meter calibration
10.4.2 Linearity of heat release rate measurements
10.4.3 Accuracy of calibration burner flow meter
11 Test procedure
11.1 General precautions
11.2 Initial preparation
11.3 Procedure
12 Calculations
12.1 General
12.2 Calibration constant for oxygen consumption analysis
12.3 Heat release rate
12.4 Exhaust duct flow rate
12.5 Mass loss rate
12.6 Smoke obscuration
13 Test report
Annex A (informative) Commentary and guidance notes for operators
Annex B (informative) Supplementary calculations — Normalization to the mass loss rate of the specific extinction area of specimen
Annex C (informative) Resolution, precision and bias
Annex D (informative) Mass loss rate and effective heat of combustion
Annex E (informative) Testing in the vertical orientation
Annex F (informative) Calibration of the working heat flux meter
Annex G (informative) Calculation of heat release with additional gas analysis
Annex H (informative) Calculation of Effective Critical Heat Flux for Ignition
Bibliography