Test on Gases Evolved during Combustion of Materials from Cables — Part 1: Determination of the Amount of Halogen Acid Gas
1 Scope
This part of GB 17650 specifies a method for the determination of the amount of halogen acid gas, other than hydrofluoric acid, evolved during the combustion of compounds based on halogenated polymers and compounds containing halogenated additives taken from electric or optical cable constructions.
For reasons of accuracy this method is not recommended for use where the amount of halogen acid evolved is less than 5 mg/g of the sample taken.
This method is not suitable for defining compounds or materials described as "zero-halogen". For such compounds or materials, and all compounds or materials, containing less than 5 mg/g halogen acid equivalent it is recommended to use the method specified in GB/T 17650.2.
2 Normative References
The following normative document contains provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the edition indicated was valid. All normative documents are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below.
GB/T 17650.2-1998 Test on Gases Evolved during Combustion of Materials from Cables — Part 2: Determination of Degree of Acidity of Gases by Measuring pH and Conductivity
3 Requirements
The method specified in this standard is intended for the type testing of individual components used in electric or optical cable construction. The use of this method will enable the requirements for individual components of an electric or optical cable construction to be stated in the appropriate electric or optical cable specification.
No requirements for compliance are included in this standard.
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Foreword II
IEC Foreword III
Introduction V
1 Scope
2 Normative References
3 Requirements
4 Test Method
5 Test Apparatus
6 Samples
7 Conditioning of the Samples
8 Procedure
