and incorporated circuitry is housed in a 44 x 32 x 32 mm watertight case which weighs 164 g. It has a response time of 0.5 ms and is compatible with any relevant instrumentation with an input impedance of 10 k~2. It is screwed on to the machinery to be monitored. Bell & Howell Ltd, Electronics & Instruments Division, Basingstoke, Hants, UK
available. They provide a magnified image at angles of 30 ° , 12 ° and 8 ° although others can be provided. Fig.4. The makers claim there is no need to focus most of these probes and that this prevents eyestrain and speeds inspection. The instruments give sharp focus from 4 mm to infinity. Inspection Instruments (NDT) Ltd, 32 Duncan Terrace, London N 1 8BS, UK
Inspectors narrow their vision Inspection Instruments has announced that their narrow-field endoprobes designed for aerospace, are generally
Fig.4 Should you ever w i s h t o peer d o w n a metal tube an endoscope w i t h a n a r r o w field of vision may be just the thing
LITERATURE & SERVICES
work in other regions. The facilities allow analysis of the origins and causes of failures.
of engineering equipment and parts. At least two more drafts are planned.
BIX Ltd, Construction House, Grovebury Road, Leighton Buzzard, Bedfordshire, UK
Lasers can be safe The British Standards Institution has recently published a guide on the protection of personnel against hazards from laser radiation: BS 4803: 1972. This is based on an earlier publication by the former Ministry of Technology. The standard is a 38 page document which will be useful to those involved in the increasing application of lasers to ndt. The standard discusses the factors which determine the level of risk from laser equipment. It recommends procedures, precautions and medical supervision of personnel. Lasers are a useful tool but can, if unwisely used, burn, blind and may even cause genetic damage and malignant changes in the body. It is essential that care be used. BSI Sales Branch, 101 Pentonville Road, London N 1 9ND, UK
A draft you can rely on The British Standards Institution is now publishing a series of drafts for development for the quantitative determination of reliability of manufactured goods; so far they have published four. These are: DD 10: 1971, guide on the reliability of engineering equipment and parts introduction; DD 11 : 1972, Guide on reliability programme for engineering equipment and parts; DD 12: 1971 Guide on the reliability of engineering equipment and parts (terminology); DD 14: 1971, Guide on the specification of reliability
NON-DESTRUCTIVE
The latest draft, DD 11 gives guidance on the preparation of a reliability programme from the initial design concept of equipment to the end of its working life. The BSI say the days are almost past when the reliability of manufactured goods could be adequately assured by means of traditional working methods. The BSI committee responsible for these documents hopes that all those interested in the development or use of reliability programmes will get copies of the drafts to comment on them from their own experience. Such comment will help the preparation of the intended British Standard.
A word or two about lasers Airtomation Services, of Leatherhead, have published a 20 page booklet which describes an electro-optical system for measurement and alignment. The system is called LEOMA which stands for Laser Electro Optic Measurement Alignment. The booklet outlines the applications in engineering and gives examples of specific uses. There are also lists of technical data. Airtomation Services Ltd, 9 Commerce Estate, Kingston Road, Leatherhead, Surrey, UK
BSI Sales Branch, 101 Pentonville Road, London N1 9ND, UK
Californium here I come
Service company branches out
The Radiochemical Centre has pubfished a technical bulletin on californium 252 neutron sources.
BIX Ltd, a British ndt company have opened a new branch at Donnington in Shropshire which offers an ndt service and mechanical and metallurgical laboratory facilities.
The centre now produces a wide selection of a, n and 7, and neutron (n) sources to provide for the changing needs of industry.
The branch has already completed welding procedure tests for Highland Fabricators and Ernest Ireland; valve performance investigation for the Gray Tool Company; and metallurgical consultancy for Coates Brothers, Oakes Welding Company and Electrothermal Engineering.
The properties of Cf-252 are listed in some detail together with the type available and transport and packaging. The sources are manufactured in batches at regular intervals of a few months. Small numbers of sources of up to 100/zg are often in stock.
The branch was set up to serve the industrial midlands but also does
The Radiochemical Centre, Amersham, Buckinghamshire, UK
T E S T I N G . A P R I L 1973
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