Maintenance lighting equipment

In addition to the fixed installation, all other electrical equipment and apparatus used on the site should be included in the preventive maintenance programme. This will included portable electrical tools, handlamps, lighting equipment and so on. By far the most important element of this maintenance is a routine visual examination of the equipment, which will detect most faults that can lead to danger. These examinations should be carried out as pre-use user checks and then periodically as part of a formal visual inspection, typically at a frequency of once every week for 230 V hand-held equipment and extension leads, and monthly for 110 V equipment and fixed 230/400 V equipment. Guidance on the frequency of these examinations, and the frequency of tests aimed at detecting defects, is published in HSE s Guidance Note HS(G)141 and the lEE s Code of practice for in-service inspection and testing of electrical equipment. 

On slow-speed equipment, where the hub does not have to be removed for maintenance and integral hubs are not available from the supplier, a straight fit can be used with a reasonably heavy shrink—1.25 mil/ in. of diameter. Tolerances may allow this value to vary from 1.0 to 1.5 mil/in. of diameter however, 1.0 mil/in. may be loo loose for some applications, while 1.5 mil/in. over-stresses hubs at maximum bore sizes. In light of this, each application should be carefully evaluated if there is no experience at hand to use as a guide. Of course, field removal at the higher shrink fit is mnrv difficult. Keys should not be used. 

Table 5.5 shows the main characteristics of UV spectrophotometry as applied to polymer/additive analysis. Growing interest in automatic sample processing looks upon spectrophotometry as a convenient detection technique due to the relatively low cost of the equipment and easy and cheap maintenance. The main advantage of UV/VIS spectroscopy is its extreme sensitivity, which permits typical absorption detection limits in solution of 10-5 M (conventional transmission) to 10 7 M (photoacoustic). The use of low concentrations of substrates gives relatively ideal solutions [20]. As UV/VIS spectra of analytes in solution show little fine structure, the technique is of relatively low diagnostic value on the other hand, it is one of the most widely used for quantitative analysis. Absorption of UV/VIS light is quantitatively highly accurate. The simple linear relationship between... 

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