4-2
Manual No 0-5072
December 1, 2008
weldskill 250, 350 safe practices
Welding
Process
Welding
current range
Suggested
Filter Lens
GMAW 40 – 150A Shade 10
GMAW 150 – 250A Shade 11
GMAW 250 – 300A Shade 12
GMAW 300 – 400A Shade 13
GMAW Over 400A Shade 14
Table 4-1 Filter lens size
Protective filter lenses are provided to reduce the
intensity of radiation entering the eye thus filtering out
harmful infrared, ultraviolet radiation and a percentage
of the visible light. Such filter lenses are incorporated
within welding handshields. To prevent damage to the
filter lenses from molten or hard particles an additional
hard clear glass or special plastic external cover lens
is provided. This cover lens should always be kept in
place and replaced before the damage impairs your
vision while welding.
NOTE
Recognised standards for recommended
practices for occupational eye protection
include AS/ANZ 1336 and EN 175.
For maximum possible protection, the
use of full helmet equipment is recom
-
mended.
The indicated filter lens shade numbers
are minimum. If any discomfort is felt,
higher shade numbers (i.e. darker filters)
should be used.
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