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5. mAintenAnce
5.1.
cHAnging tHe cArtriDge
5.1.1.
All components clip into the rear of the helmet.
5.1.2.
Bend the tabs on the bottom of the cartridge holder inwards to release them. Pull the cartridge holder down to disengage it from the
top lugs (fig.6).
5.1.3.
Pull the black knob off the potentiometer shaft on the side off the helmet and undo the nut at the base of the shaft and remove it (fig.5).
5.1.4.
Push the potentiometer through into the inside of the helmet. Do not loose the plastic disc from under the knob. Use the plastic disc
locating pin (fig.5) as a reference for correct placement.
5.1.5.
Carefully unclip the cartridge from its holder and replace.
5.1.6.
Reassemble in the reverse order, ensuring that the pointer on the grinding knob is correctly orientated.
5.2.
rePlAcing tHe outer Protective lenS cover
5.2.1.
Follow steps 5.1.2. to 5.1.5.
5.2.2.
Gently slot the two tabs at the bottom of the lens into the slots at the bottom
of the opening on the helmet, push the new lens in at the top until you
hear the tabs click into place, and refit the cartridge as above (fig.8)
5.3.
rePlAcing tHe inner Protective cover lenS
5.3.1.
Use the recess on the top edge of the lens to pull it out and renew (fig.7). Refit
the lens under the clips at each side of the cassette.
5.4.
cleAning
5.4.1.
Clean by wiping with a soft cloth. Clean cartridge surfaces regularly. Do not use
solvent based cleaners. Clean sensors and solar cells with methylated spirits
using a clean cloth and wipe dry with a lint free cloth.
fig.8
6. troubleSHooting
Problem
Irregular darkening or dimming.
Shade cartridge does not darken or flickers.
Poor vision.
Slow response.
Welding helmet slips.
© Jack Sealey limited
fig.7
cause
The headband may have been unevenly
set on the two sides of the helmet (unequal
distances from the eyes to the shade
cartridge).
The sensors are soiled or obstructed.
Front cover lens oiled or damaged.
operative lenses and/or shade cartridge
soiled.
Insufficient background lighting.
operating temperature too low.
Headband adjustments incorrect.
Original Language Version
Lock Nut
fig.5
fig.6
Solution
Readjust the distance of the shade cartridge.
Clean.
Clean or replace.
Check, clean or replace.
Adjust light.
Do not use at temperatures below -10°C
(14°F).
Refer to section 4.
PWH1, PWH2, PWH3, PWH4 Issue 1 17/06/19
Locating Pin
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