Fluke Ti55FT-20 User Manual - Page 41

Electronic Zoom, Setting Emissivity and Background, Temperature

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Chapter 4 Analyzing and Enhancing Images Setting Emissivity and Background Temperature Setting your camera with correct emissivity and background temperature values is critical to making accurate temperature measurements. Emissivity values on your camera and saved images are adjustable between 0.01 and 1.00 with increments of 0.01. This value, along with the background temperature and target radiation measured by the camera, is used to calculate target temperatures. Use the table in Appendix C, which lists the emissivity values of some common materials, as a guide to setting correct emissivity values. To set the emissivity value for an image in the camera: 1. Use the mouse controller to position the pointer over the emissivity value on the task bar and tap E. (See Chapter 2 for emissivity value location on the task bar.) 2. Use the up/down mouse action to raise or lower the value. 3. Tap to accept setting change and return to the open image. 4. Tap again to return to scan target mode. To set the background temperature for an image in the camera: 1. Use the mouse controller to position the pointer over the background temperature value on the task bar and tap E. (See Chapter 2 for background temperature value location on the task bar.) 2. Navigate up/down using the mouse controller to raise or lower the value. 3. Tap button to accept setting change and return to the open image. 4. Tap again to return to scan target mode. 4-1

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4-1
Chapter 4
Analyzing and Enhancing Images
Setting Emissivity and Background
Temperature
Setting your camera with correct emissivity and background temperature
values is critical to making accurate temperature measurements.
Emissivity values on your camera and saved images are adjustable between
0.01 and 1.00 with increments of 0.01. This value, along with the background
temperature and target radiation measured by the camera, is used to calculate
target temperatures. Use the table in Appendix C, which lists the emissivity
values of some common materials, as a guide to setting correct emissivity
values.
To set the emissivity value for an image in the camera:
1.
Use the mouse controller to position the pointer over the emissivity value
on the task bar and tap
E
. (See Chapter 2 for emissivity value location
on the task bar.)
2.
Use the up/down mouse action to raise or lower the value.
3.
Tap
to accept setting change and return to the open image.
4.
Tap
again to return to scan target mode.
To set the background temperature for an image in the camera:
1.
Use the mouse controller to position the pointer over the background
temperature value on the task bar and tap
E
. (See Chapter 2 for
background temperature value location on the task bar.)
2.
Navigate
up/down
using the mouse controller to raise or lower the value.
3.
Tap
button to accept setting change and return to the open image.
4.
Tap
again to return to scan target mode.