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4
OPERATION
WARNING! Before using the helmet for welding ensure you have read and understood the safety
instructions in Section 1.
4.1.
The helmet comes ready assembled but before it can be used it must be adjusted to fit the user
properly and set up for response time, sensitivity and shade level.
4.2.
ADJUSTING THE FIT OF THE HELMET. The overall circumference of the headband can be
made larger or smaller by rotating the knob on the back of the headband. (See adjustment 'Y' in
fig.1) This can be done whilst wearing the helmet and allows just the right tension to be set to
keep the helmet firmly on the head without it being too tight.
4.3.
If the headband is riding too high or too low on the head adjust the strap which passes over the
top of the head. To do this release the end of the band by pushing the locking pip out of the hole
in the band. Slide the two portions of the band to a greater or lesser width as required and push
the locking pip through the nearest hole (See adjustment 'W' in fig.1)
4.4.
Test the fit of the headband by lifting up and closing down the helmet a few times whilst wearing it.
If the headband moves whilst tilting, re-adjust it until it is stable.
4.5.
ADJUSTING DISTANCE BETWEEN HELMET AND FACE.
To adjust the distance between the helmet and the face in the down position loosen the tilt knobs
on either side of the helmet and slide it nearer to or further from the face (see adjustment
'Z' in fig.1) It is important that the eyes are each the same distance from the lens otherwise the
darkening effect may appear uneven. Re-tighten the tilt knobs when adjustment is complete.
4.6.
SELECTING SHADE LEVEL. Select the shade level required according to the welding process
used by referring to the "Shade Guide" below for settings. Turn the shade control knob on the side
of the helmet to the shade number required.
4.7.
SELECTING DELAY TIME. When welding ceases the viewing window
changes back automatically but with a pre-set delay to compensate for any
bright afterglow on the workpiece. The delay time/response can be adjusted using
the control on the the back of the shade cartridge. (fig.2)
4.8.
SENSITIVITY. The sensitivity can be adjusted using the control on the back of the
shade cartridge. The 'high' setting is the normal setting for everyday use. Where the
operation of the mask is disturbed by excess light or another welding machine close by,
use the 'low' setting (fig.2).
4.9.
The helmet is now ready to use. The shading may be adjusted during use by
means of the shade control situated on the outside of the helmet.
5. MAINTENANCE
5.1.
REPLACING FRONT COVER LENS. Prise the bottom edge of the cover lens frame
and flex the frame upwards until it releases from one edge (fig.3.C). Remove the
protective film from the new lens (fig 3.D) and press it into the lens frame. Hook
the frame under the side retaining lip (fig.3.A) making sure that it is the right way up.
Press on the other side of the frame to snap it under the edge (fig.3.B).
5.2.
REPLACING THE CARTRIDGE.
5.2.1. Pull the knob from the shade control and remove the nut from the spindle. Withdraw
the switch unit from the helmet.
5.2.2. Release the cartridge by removing the four screws holding the frame (fig.4).
5.2.3. Refitting is the reverse of 5.2.1 and 5.2.2.
© Jack Sealey Limited
Original Language Version
fig.1
fig.2
fig.3
fig.4
PWH598 Series
Version:1 - 08/02/16
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