Francis Searchlights A7154, User Instruction & Installation Manual

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Notes :
1)
XBO lamps are designed for dc operation only. The dc current may only be varied within
the limits of the current control range. A XBO lamp operates best at rated current; over the
life of the lamp, the current may be increased to its maximum value to compensate for loss
of light. The output of the lamp can be reduced by operating the lamp at minimum current,
but this does not prolong the life of the lamp;
2) For safety reasons, XBO lamps should be replaced once they reach the end of their
average lamp life, and not later than 1.25 times they’re average lamp life. After this time
there is an increased risk of the lamp exploding;
3) The anode (positive cap marked ‘+’) must be on top when the lamp is inserted in the
vertical position. If the anode is incorrectly inserted the arc will be unstable, the bulb will
blacken more quickly, and the lamp will prematurely fail;
4) The HT lead from the high voltage terminal of the Ignitor, must be connected to the
cathode (negative cap marked
‘ - ‘). If the lamp is connected with the wrong polarity it will be
irreparably damaged after a very short time.
5) In all circumstances the lamp manufacturer’s data should be referred to when dealing with
lamps.
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