7
English
Centering lamp and adjusting the field
The two concentric knobs located on the lamp housing allow you to align the lamp and adjust its
field. See Figure 4. The outer knob centers the lamp within the reflector. The inner knob adjusts the
lamp’s field.
Step 1: Turn on the Source Four CE and aim it at a flat surface. Adjust the barrel to create a hard
edge.
Step 2: Unlock and loosen the outer knob by turning it counterclockwise.
Step 3: Gently move the outer knob from side to side and up and down until the lamp is centered
within the reflector.
Step 4: Once the lamp is centered, turn the outer knob clockwise to lock it in place.
Step 5: Finally, turn the inner knob either clockwise or counterclockwise to achieve an optimum
flat field. See Figure 5.
Focusing the beam
Step 1: Loosen the beam focus knob located under the barrel as shown in Figure 6.
Step 2: Slide the lens tube forward or backward to achieve the desired beam edge.
Step 3: Once the luminaire is focused, tighten the beam focus knob.
Outer Knob - lamp
center adjustment
Inner Knob -
peak/flat field
adjustment
Rear lamp
housing
Figure 4 Figure 5
Flat field-best adjustment
Hot spot - lamp pulled out
too far
Field with hole - lamp
pushed in too far
Beam focus knob Figure 6