• Objective
Determine the corrosive gases evolved during the combustion of materials taken from electric or optical fibre cable constructions by measuring the acidity and conductivity.
• Reference Standard
IEC 60754-2 Test on gases evolved during combustion of materials from cables.
Part 2 Determination of acidity (by pH measurement) and conductivity.
• Test Detail
A sample consist of 1000 mg ± 5 mg shall be stored at least 16 h at a temperature of 23 ± 2°C and relative humidity 50 ± 5%.
The sample is heated in a stream of dry air with the temperature at least 935 °C for 30 min and the gases absorbed in distilled water bottle. The pH and conductivity shall be determine at the end the test.
• Performance Requirement
pH should not be less than 4.3. Conductivity should not exceed 10 μS/mm.
ENGLISH 
ภาษาไทย
