... ±10%, power capacity not less than 0.5KVA, have a good grounding, grounding resistance of less than ... crystal rod, the sample plus there is a vacuum suction device platform, the model goniometer ... analyzerx-ray tube Cu targettube voltage 30kVPtube current 0-5Masample rotate angle -10º to +50ºcounter ... +50ºtube voltage of counter 500V-1100Vtime constant 0.1second,0.4second,3secondslit 4´and 5´ and 6´ ...