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Qualitative Versus Quantitative Inspections

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Preventive maintenance inspections, especially thermal inspections with thermal imagers and non-contact point infrared instruments, can satisfy both the qualitative and quantitative predictive maintenance requirements of most plants. As a rule, most of the equipment population of a manufacturing or process plant, as well as most facilities, can be effectively evaluated, incipient problems identified and appropriate corrective maintenance tasks identified using relatively simple qualitative inspections.

A smaller population of equipment, where specific absolute temperature values are critical, must be evaluated using exact temperature values or quantitative techniques. The majority (i.e., 75% to 85%) of these requirements, both qualitative and quantitative, can be satisfied using only thermal imagers or non-contact point infrared thermometers.

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