VARI
❋
LITE - VL2200 S
ERIES
S
POT
L
UMINAIRE
U
SER
’
S
M
ANUAL
2 2
22 - May- 0 1
0 2 . 9 6 7 3 . 0 0 0 1 A
Align Lamp for Peaked or Flat Field
The design of the VL2201 optical system is based on a peaked field. A peaked field is
one where the intensity of the beam is greater at the center of the beam than at the
perimeter (see
“Photometric” on page 105
for photometric data). At this position, the
center beam intensity is maximized. The beam fall off ratio can be reduced by
repositioning the lamp by adjusting the focus knob. This results in a beam with a
flattened appearance.
The design of the VL2202 optical system is based on a flat field. A flat field is one
where there is no detectable hot spot.
After a new lamp is installed, it will be necessary to align the lamp to optimize the
beam for either the peaked or flat field (depending on the luminaire model). Knobs
located at the luminaire’s backcap will allow adjustment.
WARNING:
Backcap and adjustment knobs will be HOT during lamp operation.
Wear gloves and/or use tools to prevent burns.
To align lamp:
1. Using internal menus select
Lamp
test to set beam. See
“Lamp” on page 73
for more information. (If using console, set intensity to 100%, open beam
size iris and focus for hard edge.)
2. Position beam on a white wall at a distance of 10' to 20'.
3. At backcap, using Vertical and Horizontal knobs, adjust hot spot to center of
beam.
4. Using Focus knob, do one of the following:
a. For peaked field (VL2201), adjust hot spot for maximum center beam
intensity.
b. For flat field (VL2202), adjust beam for
best spot.
Vertical
Horizontal
Focus
Captive Knob for lamp access
(does not adjust beam)
