Infra Red Thermography
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The report documents exceptions observed during an infrared thermography survey. Each page documents an exception, showing a thermograph highlighting the problem area through color indicating temperature, with an accompanying photograph and text identifying the date, location, equipment, and problem. The priority of issues is determined based on the temperature rise above normal levels, and recommendations are provided but final repairs are left to maintenance personnel. An equipment list at the end notes what was inspected and any issues found.
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Infra Red Thermography
- 1. INFRA RED THERMOFRAPHY REPORT by ISMAIL BIN YUSOF SUMMARY OF THE REPORT The pages of the report are formatted to document exceptions (abnormally warm and cool components) observed during the survey. Each page documents are exception. The Thermograph is the Heat Picture that shows the problem. Accompanying this is a photograph of the same then with an arrow or circle to identify the HOT SPOT. The text of the pages identifies the date, area, place of equipment and the problem. The priority of each problem is given based on the temperature rise of the hot spot areas above reference, which is usually a similar component under the same conditions. This can be useful in determining the immediacy of the needed repair. The table below is used as a GUIDE for priority. Considerations such as safety, criticality of the equipment and availability of spares must also be taken into consideration by maintenance personnel when determining priority. Priority Delta Temperature of C Comments Alert 0 to 20 A problem exists, schedule action as convenient Alarm 21 to 40 Schedule action soon Danger Above 40 Schedule action immediately At the bottom of this page is a recommendation action area to suggest the correction action should be taken. However the actual repair procedure will be the decision of the owners and maintenance personnel of the equipment. This should be based on what is found once the problem investigated. REMEMBER the thermography is a tool to detect the problem area in advance so that the maintenance personnel can project schedule maintenance before it breakdown. This what people say Predictive Maintenance or Condition Based Maintenance program. The last of the report is an equipment list, which the equipment was inspected, whatever any problems were found and on which page a problem is documented if applicable. This
- 2. is useful in knowing what was checked. It also senses as a checklist for the next survey, thus maximizing the use of time on future inspection.. Along the right of the thermography is a scale showing the temperature range and the corresponding color. The hottest will be white and the cool will be blue. The area of concern is usually outlined with a rectangle, round or ellipse. A label containing the maximum temperature within the outline identifies the temperature of interest. Cursor points or another outline is used to indicate temperatures at the reference points. Sometime the isotherming function will be used to identify the warmest area of interest. This will be the color are filling in a space on the thermograph, which temperature of the color area appearing on the scale at the right of the image.