Corrosion Test Apparatus, VDE0472

VDE 0472-813
TEST ON GASES EVOLVED DURING COMBUSTION OF ELECTRIC CABLES.

FOR THE DETERMINATION OF THE CORROSIVITY OF COMBUSTION GASES
EMITTED BY HALOGEN-FREE INSULATING MATERIALS AND
SHEATHS OF CABLES AND FLEXIBLE CORDS BY
MEASUREMENT OF THE pH VALUE AND THE ELECTRICAL CONDUCTIVITY

The object of the test, is to determine whether the insulating and sheath materials of a cable emit gases with a corrosive effect when exposed to flame, whereby the existence of halogenous or other compounds with similar properties can also be established.

The method does not provide quantitative chemical proof of the presence of particular elements or groups of substances but it does recognise even very small amounts of halogens or other substances with similar effects by the sharp changes in pH-values and conductivity that they cause.

The Unit Comprises

• Tube furnace, travelling carriage and thermocouples
  
• Quartz work tube
• Control unit with digital temperature controller for tube furnace and optional over-temperature device
• 2 Gas collection bottles
• Gas cell
• pH and conductivity measuring instruments with digital display and electrodes
• Air flowmeter and all necessary tubes and connections
• 10 Ceramic sample boats