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Parts & Service: 020 8988 7400 / E-mail: [email protected] or [email protected]
USING THE HEADSHIELD
1. Remove the protective film from the lens cartridge. Remove the outer
screen as on pages 5 & 6 to remove it from the forward surface.
• The lens will be set to Light DIN 4 state, & you will be able to see the
workpiece. The lens will automatically darken when an arc is struck.
2. Test the lens by striking an arc on the workpiece for the first time. Check
also that the outer screen and lens are clean and clear at all times.
3. Change the shade setting as required using the shade adjustment knob as
described below. Refer to the table on page 5.
SELECT THE SHADE SETTING
WARNING: DO NOT USE FOR WELDING OUTSIDE THE RANGE OF DIN 9-13. INJURY
TO THE EYES & LOSS OF EYESIGHT MAY BE CAUSED.
On striking an arc, the light created will activate the solar cell and the window
will automatically darken to a preset level. The lithium battery will provide the
necessary energy to operate the headshield when there is no arc light.
Because the cartridge assembly is a sealed unit, the battery cannot be
replaced. You can adjust this shade level using the shade adjustment knob on
the side of the headshield, corresponding to the type of welding process.
• There are five levels available; 9, 10, 11, 12 and 13. Check the table
to determine which you should select.
1. Set the shade selector to the
required setting.
2. During the welding operation the
lens will automatically darken to
the pre-set shade. On removal of
the arc, the lens will return to the
light state.
3. Adjust the ‘Sensitivity’ and ‘Delay’
using the switches inside the
headshield.
SELECT THE GRINDING SETTING
The headshield has a ‘Grinding’
setting, on the selector knob. When
set to ‘Grind’ the auto darkening
function is disabled. The headshield
then provides eye and face
protection for sparks and airborne
particles created during grinding
operations.
Summary of Contents for GWH4
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