Thermal
Imagers
Menus
23
Total Imager Range
Span
Level
hie07.eps
Figure 4. 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 4. 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 the Imager to make the most
accurate temperature measurement calculations. 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 not
always, allow you to obtain more accurate temperature measurements.
