ISO 17554:2014
Reaction to fire tests — Mass loss measurement
ISO 17554:2014 specifies a small-scale method for assessing the mass loss rate of essentially flat specimens exposed in the horizontal orientation to controlled levels of radiant heating with an external igniter under well-ventilated conditions. The mass loss rate is determined by measurement of the specimen mass and is derived numerically. The time to ignition (sustained flaming) is also measured in this test. Mass loss rate can be used as an indirect measure of heat release rate for many products. However, this is not an apparatus for determining heat release rates, and the measured mass loss rates for some products are not so closely linked to their heat release rates. Such products need to be tested in accordance with ISO 5660‑1 for correct assessment of heat release.
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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 and retainer frame
6.7 Ignition circuit
6.8 Ignition timer
6.9 Heat flux meters
6.10 Data collection and analysis system
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 Irradiance control system response characteristics
10.1.2 Weighing device response time
10.1.3 Weighing device output drift
10.2 Operating calibrations
10.2.1 Weighing device accuracy
10.2.2 Heater calibration
10.3 Less frequent calibrations
10.3.1 Operating heat flux meter calibration
11 Test procedure
11.1 General precautions
11.2 Initial preparation
11.3 Procedure
12 Calculations
12.1 Average mass loss rate
13 Test report
Annex A (informative) Commentary and guidance notes for operators
Annex B (informative) Calculation of Effective Critical Heat Flux for Ignition
Annex C (informative) Calibration of the working heat flux meter
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 and retainer frame
6.7 Ignition circuit
6.8 Ignition timer
6.9 Heat flux meters
6.10 Data collection and analysis system
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 Irradiance control system response characteristics
10.1.2 Weighing device response time
10.1.3 Weighing device output drift
10.2 Operating calibrations
10.2.1 Weighing device accuracy
10.2.2 Heater calibration
10.3 Less frequent calibrations
10.3.1 Operating heat flux meter calibration
11 Test procedure
11.1 General precautions
11.2 Initial preparation
11.3 Procedure
12 Calculations
12.1 Average mass loss rate
13 Test report
Annex A (informative) Commentary and guidance notes for operators
Annex B (informative) Calculation of Effective Critical Heat Flux for Ignition
Annex C (informative) Calibration of the working heat flux meter
Bibliography