Gentex HGU-56/P, Operation And Maintenance Instructions, Page: 42 / 86

2-6. TPL CUSTOM-FITTING
Equipment, Tools, and Materials Required
• Convection oven
• Oven thermometer
•
Ruler
• Timer
• Masking tape
•
Cotton gloves
• Helmet with TPL to be fitted
CAUTION
If using an oven with upper heating elements to heat the TPL, ensure that the upper
heating elements do not activate during the heating process, or plastic TPL layers will
melt.
NOTE: Do not use a microwave oven; it will not heat plastic layers.
1. Referring to Figure 2-55 , set the
oven rack to the lowest position;
heat the oven to 200°F
±
5°F
(93.3°C
±
2.8°C).
CAUTION
Before you place the TPL in the
oven, ensure that the cover is
attached properly to the plastic
layers (not on backwards).
2. Place the TPL in the center of the
rack in the heated oven, cloth
side on the rack.
(Continued on next page)
36
Figure 2-55. Correct Oven Temperature
and Rack Position
Proper fitting is essential to the functioning of the helmet, all of its components,
and, consequently, the safety of the wearer. Take as much time as necessary to fit
the helmet precisely. Use extreme care in taking measurements and checking fit.