User Manual

Thermal Imagers
Menus
17
Total Imager Range
Span
Level
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Figure 3. Level and Span Settings
Temperature Span for Manual Operation Mode
When in manual mode, the span setting contracts or expands in a selected
palette in a temperature range within the total range. See Figure 3. In the live
manual mode, the arrow buttons are always available to adjust the level and
span.
To adjust the temperature span:
1. Push  to increase or widen the temperature span.
2. Push  to decrease or narrow the temperature span.
While you adjust the manual span, the scale along the right side of the display
shows the thermal span increasing or decreasing in size.
Emissivity Adjustment
The correct emissivity values are important for you to make the most accurate
temperature measurements. Emissivity of a surface can have a large effect on
the apparent temperatures that the Imager observes. Understanding the
emissivity of the surface being inspected can, but may not always, allow you to
obtain more accurate temperature measurements.