Quantification
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1. On the main toolbar, select Delta T. This displays a dialog box.
2. In the dialog box, you can define the settings:
• Turn on/off the Delta T feature.
• Atmospheric temperature: The current ambient air temperature in the same gener-
al area as the gas leak.
Note This setting is the same as for the measurement parameters, see section
10.5 Measurement parameters. Any changes in the Delta T dialog will also change
the corresponding measurement parameter setting.
• Temperature difference: Set the temperature difference to 2°C (3.6°F).
3. To close the dialog box, push the Back button.
9.3.7 Start the measurement
Note Do not move or shake the camera while measuring the gas. This will ensure a
better measurement result.
To start and run the measurement process, do the following:
1. On the main toolbar, select Start measurement.
2. The camera displays the progress on the screen.
3. When the measurement is completed, the quantification result is displayed. The re-
sult is automatically saved to the memory card.
9.3.8 Quantification results
The camera saves the quantification result as an image in the active folder in the image
archive.
To view the quantification result in the camera, do the following:
1. On the Mode selection menu, select Gallery.
2. Go to the active folder.
3. Select the quantification result image you want to view.
4. Push the joystick or tap the screen. This displays the top toolbar.
5. On the top toolbar, select
. This displays the right toolbar.
6. On the right toolbar, select
. This displays the quantification result.
9.3.9 Transfer quantification results
The quantification results are stored on the memory card.
You can upload the quantification results to your FLIR Ignite account or transfer the result
files manually using the USB cable or the memory card.
9.4 Practical information
9.4.1 Measurement position
Once a leak is identified, the operator will observe the leak from several positions to find
a viewing angle that gives the camera the best measurement position to quantify the leak.
Factors to consider when determining the optimal viewing angle:
• Ideally, you will want an unobstructed view of the leak location. If this is not possible,
you will want an unobstructed view of the gas plume.
• Selecting a suitable background is important as quantification requires sufficient ther-
mal contrast. In general, the gas plume will be the same temperature as the ambient
air temperature because the small amount of gas escaping from the equipment and
entering the atmosphere will quickly equilibrate with ambient temperature. The back-
ground should be at least 2°C (3.6°F) warmer (or colder) than ambient temperature to
#T810605; r. AD/92464/92464; en-US
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