S. 14
Edition I / May 2012
opEratIng InStructIonS DEB1200D anD DLH1200D
9) ADJUSTING THE LIGHT INTENSITY
Advantages of the 800W metal halogen lamp:
- drive in boost position (1200 W)
- drive in nominal position (800 W)
- drive in dim position (400-1200 W)
Boost Position
(135%)
The DEB1200D electronic ballast may be set to the boost position ” ” by the
yellow three position switch mode selector 1. This pushes the lamp from 800 W to
1200 W. Even with increased intensity, the color temperature stays practically
constant.
The lamp can be used continuously in boost position “ “ but lamp life will decrease.
Nominal Power
(100%)
The optimum operating mode of a metal halogen lamp is at nominal output, i.e.,
switch position “ “ (mode selector 1).
The metal halogen lamp is regulated to a constant power of 800 W which meets
lamp manufacturers’ recommendation.
Dimming
(50-135%)
Dimming is possible with the yellow three position switch set to dimming
position “ “(mode selector 1).
When in dimming position, the light intensity can
be regulated on the left knob “ ” from 450 - 1200 W.
When dimmed electronically, the lamp is not in an optimum operational state.
Operating in dimming position will not lengthen lamp life.
10) ADJUSTING THE SILENT MODE
The optimum operating mode of the system is in „flickerfree“ Position (mode selector 2)
The Lamp is driven with 75 Hz square wave.
It is possible to adjust to „50 Hz“, „60 Hz“ (mode sector 2) if you have a „singing
Lamp“.
The System will create less noise but have a higher flicker factor of emitted light.
In 50 or 60 cycle mode flicker can only be avoided with cameras operating at
recommended frame rates and shutter angle (opening).
