Bullard Thermal Imager
3
Use and Operation
Power
To turn on your Bullard Thermal Imager, simply depress the
large green “On/Off” button on the left side of the unit
(Item 1, Figure 1)
. Upon depressing the “On/Off”
button the “Sleep” indicator light will appear on the
viewing screen. However, the thermal image will not
appear immediately as the unit requires a few moments to
warm-up and complete the self-calibration process. After
approximately 20 seconds, the thermal image will appear.
Sleep Mode
To conserve battery life, the Bullard Thermal Imager
includes a unique “Sleep” feature. To put the unit into
“Sleep” mode, simply press the yellow “Sleep” button on
the left side of the unit
(Item 2, Figure 1)
. When in the
“Sleep” mode, the “Sleep” indicator light will appear on
the viewing screen. To bring the unit out of the “Sleep”
mode, simply push the yellow button again. The thermal
image will immediately reappear on the screen.
Thermal Throttle
The Bullard Thermal Imager features the first fully
adjustable aperture (Thermal Throttle) which means you
always get the clearest picture. Simply put, the Thermal
Throttle controls the amount of energy that reaches the
thermal detector. The process is similar to that of the pupil
in the eye. When there is bright light the pupil shrinks to
protect itself. When there is low light the pupil expands.
The Thermal Throttle works the same way. In high heat
situations, the Thermal Throttle may be reduced down to
obtain the best contrast and the clearest image. In low
heat situations, the Thermal Throttle should be wide open.
Since the Thermal Throttle is manually adjusted, the
operator can always get the clearest image.
The Thermal Throttle is manually adjusted by turning the
Thermal Throttle dial on the front left of the unit
(Item 3,
Figure 1)
. Turning the dial clockwise (toward the lens)
closes the Thermal Throttle, turning it
counterclockwise opens the Thermal Throttle.
For increased durability, the Thermal
Throttle is equipped with a safety slip
mechanism, which engages when the Thermal Throttle
reaches the fully open or fully closed position. This
mechanism prevents over-adjusting or over-tightening the
dial.
Bullard recommends the following Thermal
Throttle adjusting procedure
Once the unit is turned on and the internal calibration is
completed, turn the Thermal Throttle clockwise until the
image on the screen disappears. This is the fully closed
reference position. Then turn the Thermal Throttle knob in
the opposite direction until the picture contrast is to your
liking. It will take less than one full revolution of the
Thermal Throttle to completely open the aperture. Once the
aperture is fully open the safety slip mechanism engages
to ensure the Thermal Throttle is not over-tightened.
Continuing to turn the dial beyond that first full revolution
will not improve the contrast.
NOTE
Most of the needed adjustment will be
accomplished within about 1/4 of a
revolution of the Thermal Throttle.
12v DC Adapter
Figure 2
110 AC Power Supply
Dual Charger
U
se and Oper
ation
