Operation
9
9.12.2 Procedure
Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Settings
. This displays a dialog box.
3. In the dialog box, select Measurement parameters. This displays a dialog box.
4. In the dialog box, select Emissivity. This displays a dialog box.
5. In the dialog box, select one of the following:
• Matt.
• Semi-matt.
• Semi-glossy.
9.13 Setting the emissivity as a custom material
9.13.1 General
Instead of specifying a surface property as matt, semi-matt or semi-glossy, you can specify
a custom material from a list of materials.
For more information about emissivity, see section 15 Thermographic measurement tech-
niques, page 43.
9.13.2 Procedure
Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Settings
. This displays a dialog box.
3. In the dialog box, select Measurement parameters. This displays a dialog box.
4. In the dialog box, select Emissivity. This displays a dialog box.
5. In the dialog box, select Custom material. This displays a list of materials with known
emissivities.
6. In the list, select the material.
9.14 Changing the emissivity as a custom value
9.14.1 General
For very precise measurements, you may need to set the emissivity, instead of selecting a
surface property or a custom material. You also need to understand how emissivity and re-
flectivity affect measurements, rather than just simply selecting a surface property.
Emissivity is a property that indicates how much radiation originates from an object as op-
posed to being reflected by it. A lower value indicates that a larger proportion is being re-
flected, while a high value indicates that a lower proportion is being reflected.
Polished stainless steel, for example, has an emissivity of 0.14, while a structured PVC
floor typically has an emissivity of 0.93.
For more information about emissivity, see section 15 Thermographic measurement tech-
niques, page 43.
9.14.2 Procedure
Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
#T810252; r. AA/41997/41997; en-US
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