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BS EN 60754-2:2014

BS EN 60754-2:2014

$142.49

Test on gases evolved during combustion of materials from cables – Determination of acidity (by pH measurement) and conductivity

Published By Publication Date Number of Pages
BSI 2014 24
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IEC 60754-2:2011 specifies the apparatus and procedure for the determination of the potential corrosivity of gases evolved during the combustion of materials taken from electric or optical fibre cable constructions by measuring the acidity (pH) and conductivity of an aqueous solution resulting from the gases evolved during the combustion. The general method specified in this standard is intended for the testing of individual components used in a cable construction. Formulae are given for the calculation of a weighted value for a combination of materials found in a specified cable. The use of this method will enable the verification of relevant requirements for either individual components or combined components of a cable construction stated in the appropriate cable specification. A simplified method is included for the testing of individual components where it is required only to demonstrate compliance with a stated performance requirement for quality control purposes. The significant technical changes with respect to the previous edition are as follows: – improved definition of safety requirements relating to capture of gases; – introduction of guidance on the preparation of test specimens for more even combustion; – better expression of tolerances and precision; – clarification of the conductivity and acidity functions; – improved definition of the heating procedure; – greater precision in the definition of the test temperature for the determination of pH value and conductivity; – correction of the formulae for the calculation of the test results. It has the status of a horizontal standard in accordance with /2.

PDF Catalog

PDF Pages PDF Title
6 English
CONTENTS
8 INTRODUCTION
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Test method principle
5 Test apparatus
5.1 General
5.2 Tube furnace
5.3 Quartz glass tube
5.4 Combustion boats
11 5.5 Bubbling devices for gases
5.6 Air supply system
12 5.7 Analytical balance
5.8 Laboratory glassware
5.9 pH meter
5.10 Conductivity measuring device
6 Test specimen
6.1 General
6.2 Conditioning of specimen
6.3 Mass of specimen
13 7 Test procedure
7.1 General
7.2 Test apparatus and arrangement
7.3 Heating procedure
7.4 Washing procedure
7.5 Determination of the pH value and conductivity
14 8 Evaluation of the test results
8.1 General method
8.2 Simplified method
8.3 Weighted values
15 9 Performance requirement
10 Test report
16 Figures
Figure 1 – Device for inserting combustion boat and test specimen
17 Figure 2 – Example of a gas washing bottle
18 Figure 3 – Test apparatus: method 1 – Use of synthetic or compressed air from a bottle
19 Figure 4 – Test apparatus: method 2 – Use of laboratory compressed air supply
20 Figure 5 – Test apparatus: method 3 – Use of ambient air sucked by means of a suction pump
21 Annex A (informative) Recommended performance requirements
22 Bibliography

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BS EN 60754-2:2014
$142.49