The moisture content of the covering on the Low Hydrogen electrodes shall be determined as per the procedure laid down in SFA-5.1. The apparatus consist of the following :
Combustion Tube Furnace with heating element to 2000*F (1093*C.)
An Oxygen purifying train consist of a needle valve, a flow meter, a 96% sulfuric acid wash bottle. A spray trap. And an anhydrous magnesium perchlorate drying tower.
A fused silica combustion tube and plug of glass wool filter.
A water absorption train consist of a U- Tube filled with anhydrous magnesium perchlorate and a concentrated sulfuric acid gas-sealing bottle.