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Lamp
About the discharge lamp
The MAC III AirFX is designed for use with an Osram Lok-it HTI 1500W/60/P50 - 7mm lamp. This highly
efficient single-ended discharge source provides a color temperature of 6000 K, a color rendering index
greater than 90, an average service life of 750 hours and semi-hot restrike, meaning that a hot lamp is ready
to strike again after 90 seconds.
Lamp power is automatically reduced to approximately 800 W after 10 seconds when the fixture is blacked
out in order to reduce cooling fan activity and power consumption. The lamp returns to 1500 W as soon as
the dimmer and/or shutter are opened.
Warning!
Installing any other lamp may create a safety hazard or damage the fixture!
To reduce the risk of explosion, replace the lamp when it reaches the limit of its average service life, i.e.
when usage reaches 750 hours. Never exceed the lamp's average service life by more than 10%. To read
lamp hours in the fixture's display, refer to the section on lamp hours readouts on page 19. Replace the lamp
immediately if it is deformed or in any way defective.
For maximum service life, avoid powering the lamp off until it has warmed up for at least 5 minutes.
Lamp replacement
Warning! Wear safety glasses and gloves when handling lamps. The clear lamp bulb is integral with
the ceramic lamp base. Do not try to separate the bulb from the base.
Important! The lamp can be a stiff fit in its holder. Twist the lamp base a full 45° clockwise when
installing to ensure that the lamp contacts are fully engaged.
Replacement lamps are available from your Martin dealer requesting P/N 97010348.
The clear bulb must be perfectly clean. Do not touch it with your fingers. Clean the lamp with an alcohol
wipe and polish it with a dry cloth before installing, particularly if you accidentally touch the bulb.
To replace the lamp:
1. Disconnect the fixture from power and allow it to cool for at
least 2 hours 45 minutes.
2. Lock the head.
3. Release the screw on the lamp access cover and open the
cover.
4. Grasp the ceramic lamp base, twist it 45° counterclockwise
and withdraw the lamp from the fixture as shown in Figure 2.
5. The lamp base has two metal contacts, one narrow and one
wide, that fit into corresponding narrow and wide slots in the
lampholder. Line up the contacts on the replacement lamp's
base with the corresponding slots in the lampholder, slide
the lamp into the fixture so that the contacts are fully
engaged in the slots, and then twist the lamp base a full 45°
clockwise until it locks into position with a noticeable click.
The lamp is a stiff fit and trying to strike a lamp that is not
correctly installed can cause damage that is not covered by
the product warranty, so ensure that the lamp is correctly
locked into position.
6. Close the lamp access cover and tighten the screw to
secure the cover before reapplying power.
7. After installing a new lamp, reset the lamp hour counter (see
the section on lamp hours readouts on page 19).
10
MAC III AirFX user manual
Figure 2: Lamp removal / refitting
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