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close this bookA Guide to the Establishment and Maintenance of Pesticide Laboratories in Developing Countries - Bulletin No.25 (NRI/Overseas Development Administration, 1990, 80 pages)
close this folderLaboratory requirements
close this folderLaboratory services
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View the documentElectricity supplies
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View the documentVacuum supplies

Electricity supplies

Modern laboratories use relatively large amounts of electrical equipment and the overall power consumption can be high. Some of the equipment is in transient use, but a proportion of it, for example, laboratory ovens, refrigerators/freezers, balances and gas-liquid chromatographs, must be run continuously. With refrigerators/freezers and the need to preserve stored materials this is self-evident, but it is equally critical for the stability of modem, sophisticated analytical equipment that the power supply be stable, uninterrupted and maintained 24 hours a day. The power supply must:

· be capable of meeting the full demands of the laboratory, including air-conditioning where necessary;

· be stable and not subject to voltage fluctuations. If voltage fluctuations are likely then a voltage stabilizer must be installed for those circuits operating laboratory equipment, for example, gas-liquid chromatographs.

The provision of an auxiliary power supply is essential where cuts in the supply are of a regular or frequent nature; a modern laboratory cannot function without power and to eliminate costly down-time, the potential loss of analytical samples and instrument instability or damage, the cost of a standby generator together with fuel costs should be included in the commissioning budget for the laboratory. The output capacity of the generator will reflect the size of the laboratory but is likely to be in the range of 20-60 KVa.