Unexpected breakdowns can be very expensive, not only in terms of the cost of emergency repairs, but also the cost of production lost. Many problems can be predicted by monitoring the temperature of electrical systems, bearings and pipelines. Overheating can also create a fire hazard.
PREI Instrumentation have a complete range of Raytek noncontact infra-red thermometers with an accuracy of 1%, which are money-saving tools for diagnostic and predictive maintenance.
There are 20 different models of these handheld thermometers, which cover the range from -50 to +3000°C. Many have laser sighting, some have data loggers, and a few are intrinsically safe. A short form of these portable infrared thermometers is available on request.
* Normal on/off current loading and environmental temperature changes cause electrical connections to expand and contract and gradually loosen. A loosened or corroded connector has a higher resistance to current flow, dissipates power and gets hot.
* The life of electrical insulation material on windings in motors and transformers is drastically shortened if the operating temperatures exceed rated maximums.
* Rotating equipment is supported on bearings, and when the equipment vibrates, the bearings get hot and eventually fail - often at the most inconvenient time.
* Three phase power systems are common, and generally the power is balanced. If this balance is upset due to an internal problem, one phase will be overloaded, which will cause one of the cables and connectors to be hotter than the other two.
* If the temperature of cooling water or oil rises, it indicates a problem. Temperature scanning of the pipes is quick and easy - and could result in the prompt prevention of a disaster.
* Ageing electrical components cause fluorescent lighting ballasts to overheat. These fittings are usually out of reach for checking by anything other than a noncontact thermometer.
Noncontact thermometers have been around for over 30 years. They are tools which give very quick information on equipment which cannot be reach or touched because (a) it is moving, (b) it is hygienic (food) or (c) it is dangerous (live electrical contacts).
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