Page 10 of 32
3.4.5 Directional Buttons
The directional buttons (up, down. left & right – see Figure 13) are used for three different functions.
1.
If hot button 3 is set to either SP+ or SPX, the directional buttons control the position of the selected
temperature cursor. (Selection displayed above hot button 3).
2.
If hot button 3 is set to B-C, “up” and “down” control the auto mode’s target image thermal
brightness, and “left” and “right” control the target thermal contrast. See Section 3.4.9.1 for details. If hot button 3 is
set to L-S, “up” and “down” control the manual mode’s image temperature level, and “left” and “right” control the
temperature span. See Section 3.4.6.1 for details.
3.
If the menu is displayed, the directional buttons control the movement of the highlighted cursor and adjustment of
the highlighted option (See Section 3.4.7).
Up
Left
Right Right
Down
Figure 13: Directional Buttons
3.4.6 Image Adjustment
3.4.6.1
Level and Span Definitions
When hot button 4 is set to manual the HSI3000’s image settings can be manually controlled by adjusting the
level and span. When hot button 3 shows L-S, the “right” and “left” buttons respectively will increase and
decrease the span of the image 7.2˚F (4°C) in the example in Figure 14). The “up” and “down” buttons will
increase and decrease the thermal level of the image 84.2˚F (29°C) in the example in Figure 14).
Figure 14: Level and Span
The HSI3000’s image settings are fully
automatic when hot button 4 is set to auto. The
auto mode automatically adjusts the level and
span to display a presentable image.
(31.0°C)
(27.0°C)
Level = (Max + Min)/2 =84.2°F (29°C)
Span = Max – Min = 7.2°F (4°C)
