... X-ray generator: X-ray tube:Cu target, anode-grounding, fan cooling;Tube voltage: 30KVPTube current: 0~5mA, adjusted successively;(2) Total ... and controller , high voltage transformer, magnifying, digital counter, air pump , cooling fan , x-ray tube.4.2. The tube housing of orientation ... time, the brightness of filament should change. (2) The cooling fan should work and make voice.(3) Switch on the air ...