Oce Arizona T220UV, User Manual

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Safety Information 19
UV Lamp Safety
Introduction
The Arizona T220UV printer is designed so that direct light from lamps is not visible and bounce (reflected) light is
minimized. UV lamps radiate harmful ultraviolet rays, which can cause serious burns to skin and eyes. While thermal burns
are felt immediately, UV burns are not felt for several hours. Short exposure to lamp radiation can cause severe burning of
skin and eyes. UV burn of the eyes affects the cornea and takes several days to heal. UV burn is identical to "Welder's burn"
and will feel like sand in the eyes that cannot be washed out. The discomfort is transitory. Extreme caution must be taken -
high power UV radiation can cause blindness.
Limited exposure to UV radiation will evoke erythema on normal skin. Such erythema is transitory and will not produce
blistering, nor tanning, as only a small amount of radiation penetrates the Malpighian layer. Extreme caution must be taken
since high power UV radiation can cause severe burns to the skin.
Note:
The Arizona T220UV printer has a built-in interlock safety system that shuts down the UV lights if the gantry doors are
opened. This ensures that the operator is not exposed to potentially harmful UV rays from the lamps. The section “Safety
Interlocks” explains the interlock system and how it protects the operator from UV exposure.
Statement of UV Safety
UV Lamps : Superficial eye damage and burning of the skin can occur with even brief exposure to UV light. Serious injuries
can result from prolonged exposure, especially if unshielded. Some UV lamps operate at very high temperatures
(approximately 800° C). For this reason, never touch a lamp which has been in operation. Let the lamp cool before attempting
any maintenance, and then use extreme care in handling the bulbs. Most bulbs contain a small amount of metallic mercury
which is toxic when ingested, handled, or breathed. Therefore, if bulbs are broken, care should be taken to clean up the spill
immediately.
The UV Lamps emit dangerous levels of UV light. Arizona T220UV operators must limit their exposure to UV/Blue light
escaping from beneath the gantry hinged gates. The UV Radiation Hazards of the machine have been measured according
to EN12198 and are at safe levels outside the machine.
Gantry Cover Brush : The Brushes are used as a UV Shield to prevent stray UV light escaping from the front and back of
the gantry, while still allowing adequate media clearance. The brushes must be replaced if they become contaminated or
deformed by any means. The brushes must be replaced at least every two years, or sooner if they become contaminated or
deformed in any way.
Emmision Compliance
Effective UV-irradiance Emmision Category of AzT220UV According to 7.1 of EN12198-1:2000 Category (1)
Effective Irradiance respective the Effective Radiance Emmision Category of AzT220UV According to 7.1 of
EN12198-1:2000 Category (1)
Handling UV lamps
Bare skin contact with the UV lamps must be avoided. Replacement lamps must be wiped with the supplied cleaning solution
before placing in service. Compounds from the skin when heated on lamps operating at 600 to 850C will form permanent
etching (devitrification) on the quartz surface decreasing UV energy transmission. A contaminated lamp eventually may
overheat, causing premature failure.
When unpacking the lamps, the carton should be opened fully so lamp can be lifted out of packaging with no twisting or
pulling. Unpacking should take place in an area large enough to eliminate the possibility of inadvertently striking lamp
against walls, pillars, pipes, beams or press machinery.
Ozone Safety
Tri-atomic oxygen or ozone (O3) is the only by-product of the UV lamp. It is formed by oxygen being exposed to 254nm
wavelengths of UV energy. Ozone is effectively eliminated in the printing area by exhausting air from the cooling system of
the T220UV. Such exhausting involves no danger as the hot gas is very unstable and breaks down to oxygen rapidly in
ducting. Also, the Arizona T220UV printer is equipped with ozone filters located above the fans in the gantry. These filters
ensure that ozone is kept to a minimal safe level.