Martin Professional Extube, User Manual

Page: 35 / 48

Service and maintenance 35
Warning! The Extube is IP65 rated. This means that it will withstand
water projections, but do not expose it to high-pressure water jets or
immerse it in water or any other liquid.
Clean the Extube’s housing and front glass with a soft cloth dampened
with a solution of water and a mild detergent such as car shampoo. Take
care not to damage seals and wiring during cleaning. Do not use products
that contain solvents, abrasives or caustic agents for cleaning, as they can
cause surface damage to the fixture and its front cover.
Diffusers
Important! To avoid damaging the aluminum alloy housing, use plastic bicycle
tire levers – not bare metal tools – to lever off front glass retaining
strips.
Extube fixtures are provided with no diffuser to give a Very Narrow beam
angle or with a Narrow, Medium or Wide diffuser filter installed at the
factory. Diffuser filters can be identified by notches at one end as follows:
• 1 notch – Narrow
• 2 notches – Medium
• 3 notches – Wide
If you need to replace or install a diffuser filter:
1. Cut power to the installation and allow to cool for at least 20 minutes.
2. See Figure 13 on page 36. Look carefully under the metal strips on
either side of the front glass. On one side of the front glass, the strip is
an integral part of the housing and there is no gap between strip and
housing. On the other side of the front glass, there is an extra ridge
under the outer edge of the strip and a narrow gap where the strip
meets the housing. This strip is the front cover retaining strip and can
be levered off the housing to release the front glass.
3. Using plastic bicycle tire levers or similar tools that will not damage the
Extube’s metal alloy surfaces between the front cover retaining strip
and the housing, lever up and remove the front cover retaining strip. If
plastic levers are not available, large flat-bladed screwdrivers with a
piece of paper folded at least 4 times and then folded over the blade to
prevent metal-to-metal contact can be used in an emergency, but