Fluorescent penetrant checking and magnetic particle inspection are key diagnostic techniques in on Destructive Testing in such industries as aerospace, castings and automotive and structural engineering. Key to successful inspection (and hence the safety of customers and the public alike) is accurate and reliable monitoring of assessment tools. Background Detection of aws and cracks in materials and structures used in the manufacture of aerospace components is understandably vital to the safety of all air travellers. Similar requirements are also manifest in other manufacturing areas including automotive and structural engineering.
Two common techniques for crack detection are uorescent penetrant checking and magnetic particle inspection. Both techniques rely upon the ingress of an applied uorescent dye into aws - with the aw being subsequently visible under UV illumination. In carrying out such processes it is essential that the performance on the “checking tools” is closely monitored specically: • the dye emits the correct amount of visible light • the UV lamp emits the correct amount of UV light with minimum visible light in its spectrum • the ambient lighting conditions are acceptable such is the importance of these checks is that they are prescribed by various standards bodies. Such standards include British Standards BS4489 and BS667, Civil Aviation Authority Air Worthiness Notice 95 and Rolls Royce Standard RPS702.
The Applied Scintillation Technologies Solution AST and its sister company Levy Hill Laboratories have a long history in developing and manufacturing custom solutions of UV and white light monitoring as well as calibration of meters. Reviewing the equipment available, AST - in consultation with leading industrial and aerospace companies - developed an instrument to more accurately address the specic and demanding requirements of the market. Key Features and Benefits of Levy Hill MkVI Consultation with the market prior to design highlighted very direct demands in addition to the basic requirements of accurate and reliable measurement.
The Levy Hill MkVI addresses these specically: • large area, integrating detector head to minimise errors from hot-spots within the lamp • light and highly robust construction allowing single handed operation • automatic power off and LCD display minimise battery usage • automatic back-lit display in low light level / UV operation As a result the Levy Hill MkVI is now the most widely sold meter in the UK and EU and elsewhere as customers recognise the design advantages and benets. Further backed by AST’s in-house support from an ISO9002 registered company and accredited calibration service traceable to national standards, the Levy Hill MkVI is now a recognised meter on national standards. This is reected in accreditation by UK and other civil aviation authorities and the extensive international client list which includes British Aerospace, GE Aircraft Engines, Westland Helicopters and Allied Signal.