GAM METAL HALIDE 575W - Manual (Page 3)

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GAM Product # GL4002.15/30,25/50
METAL HALIDE 575W
Local Operation
Set the switch to manual operation. You can switch the
lamp on and off by the main switch. Use the dim potenti-
ometer to regulate intensity.
Notes on METAL HALIDE 575W Lamps
Frequent power cycling with operating times less than
two minutes will dramatically reduce life time. To achieve
operating temperature quickly set intensity to full for the
first 2 minutes of operation. After a hot re-strike do not
switch off the lamp until it achieves operating tempera-
ture (ca. 1 minute). This will cause ignition problems and
reduces the lifetime. Important information for hot re-strike:
The MSR HR Lamp, which is used in GAM METAL HA-
LIDE 575W is generally hot re-strikeable.
But there are two conditions, where hot re-strike may not
be possible.
After cold start:
Normally you should NOT switch the ballast off when
the lamp has not reached operating temperature (after
2-3 minutes). This could cause problems with hot re-strike
and reduces the lifetime of the MSR lamp. On immediate
restart (also after power loss) the lamp ignites promptly. A
problem could occur if you try to ignite the lamp after 30-
60 seconds. After another couple of minutes the restart is
possible without any problems.
After a longer operating time (more than one hour):
If you try to hot re-strike the lamp in this period, it is pos-
sible that the igniter-system ignites several times before
the arc is established. If the arc could not be established
after 4-5 attempts (old MSR lamp), the igniter will be de-
activated. Only when you give another ignite command
(per DMX or manual) will the igniter be working. In this
case it will be helpful to switch the ballast off, wait a
couple minutes and switch it on again.
Lamp Adjustment
All lamp houses are adjusted when they are shipped.
Because of lamp variations it could be necessary to
readjust them with the attached wrench. The PAR units
need not be readjusted.
At the rear of the lamp houses are 3 holes, which pro-
vide access to the adjustment screws. Use an allen key
to bring the lamp into optimum position. Proportionately
turning of all 3 screws counterclockwise causes lamp
focus to approach a hot spot in the center with all off
around the edges.
Proportionately turning all of the screws clockwise
causes a de-focusing, with the fall off in the center with
the edges becoming bright. Turning only one of the
screws moves the area of highest light intensity in the
direction in which the screw is turned. Counterclockwise
the light intensity moves away from the screw, clockwise
towards the screw.