15. Automatic internal
CF 1200 Spot
, has several automatic internal functions which may not be notice at
functions
first glance. However, they serve to add functionality to the projector, and to assist in
extending the servicability of the unit.
internal timer to prevent restriking a hot lamp
An internal timer is provided to avoid restriking a hot lamp until at least 6 minutes
have passed since it was turned off.
This function protects the internal ignitor circuitry for possible damage; it also serves
to preserve and protect the lamp itself.
NOTE:
the timer is only reset by the projector being switched off.
internal timer to prevent continuous attempts to strike a lamp
An internal timer allows 1 minute for the lamp to be successfuly ignited. If after this
first minute of attempts, the lamp has not struck, the timer protects the internal balla-
st and ignitor circuitry by no longer allowing the user to strike the lamp
NOTE:
failure of the lamp to strike would indicate that the lamp has reached the
end of its operating life. Power should be turned off to the projector (which will reset
the timer) and the lamp should be changed.
thermal protection
Two thermal sensors, located in the head and the base of the
CF 1200 Spot
pro-
tect the unit from overheating.
The sensors will cause power to the lamp to be switched off if the temperature
exceeds the maximum allowable, the may be due to the fixture being located in an
area where there is a lack of circulation around the unit, or in the event that a coo-
ling fan within the unit has failed.
automatic realignment
An internal 4 point encoder system allows the
CF 1200 Spot
to return to its correct
position in case the unit is accidentally knocked out of alignment whilst operating.
This is particularly useful if the projector is to be mounted on the floor in a position
where the performer or artist may accidentally bump the unit.
NOTE:
this facility may be deactivated if desired (see section 11).
