Gentex TBH IIIA Series, Руководство оператора

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6
HELMET PREPARATION
Helmet preparation includes determining helmet size, checking the fit of the pad suspension, and
adjusting the chin strap.
DETERMINING HELMET SIZE
Helmet sizes are Small, Medium, Large, and X-Large. To determine size, you must (1) measure and
record the wearer’s
head length , (2) measure and record the wearer’s head breadth , (3) measure
and record the wearer’s head circumference , and (4) select the helmet size based upon the
parameters in the tables on Page 7.
Tools/Equipment Needed:
• Caliper • Ruler • Tape measure
MEASURE HEAD LENGTH
Use a caliper and a ruler to measure the distance
(to the nearest
1/16
inch) from the point between
the eyebrows to the back of the head. Ensure
that the caliper touches the skin lightly and does
not indent the skin. Record the measurement.
MEASURE HEAD BREADTH
Use a caliper and a ruler to measure the maximum
head width (to the nearest
1/16
inch) above the ears.
Ensure that the caliper touches the skin lightly and
does not indent the skin. Record the measurement.
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2
CONTINUED ON NEXT PAGE
Between
eyebrows
Back of
head
Caliper
Caliper
Ruler
Ruler
HEAD LENGTH
HEAD BREADTH