A variable height support with a platform and a base supporting the platform and reconfigurable to selectively change a height of a support surface on the platform relative to a subjacent surface. The system includes a remote wireless communication control machine and a submerged arc furnace reactive compensation device. The gas output port may be disposed on the case for the test gas flowing out of the chamber. The flexible data structure also enables database access software to respond to user queries in a more effective and informative manner.