Fluke 568, 566 user manual Distance and Spot Size

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Infrared Thermometers

Operating the Thermometer

Distance and Spot Size

As the distance (D) from the object being measured increases, the spot size (S) of the area measured by the unit becomes larger. The relationship between distance and spot size (D:S) for each unit is shown in Figure 5. The spot sizes indicate 90 % encircled energy.

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Figure 5. Distance and Spot Size

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Contents 566/568 Limited Warranty and Limitation of Liability Table of Contents 566/568 List of Tables 566/568 List of Figures 566/568 Contacting Fluke IntroductionWWarning Safety InformationSymbols Explanation Symbols and MarkingsDisplay Language FeaturesMenu Overview SaveDescription Light MemoryEmissivity Menu Min, Max, Avg, Differential Nominal Surface Emissivity Material ValueMaterial Value Alarm Trigger LockLaser Backlight SetupDeleting Data LanguageTemperature Measurement How the Thermometers WorkOperating the Thermometer Locating a Hot or Cold Spot Locating a Hot or Cold SpotDistance and Spot Size Distance and Spot SizeEmissivity Field of ViewDownloading Data Storing DataTroubleshooting Troubleshooting Symptom Cause ActionExternal Contact Probe Maintenance Battery ChargeChanging the Batteries Cleaning the Lens User Replaceable Parts and AccessoriesCleaning the Housing AccessoriesRecommended Temperature Probes Specifications Feature Type Thermocouple Probe Bead Type Measurement Range Feature 566 568 Battery LifeCE Certification Cable Length566/568