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b.
M-100 and M-200 Series Headgear Only: The fabric straps of the M-150 Head Suspension can
be adjusted by sliding the blue strap lock located on the center strap (Fig. 3). Sliding the buckle
towards the rear of the headgear tightens the straps and will raise the height of the headgear
on the head. Sliding the buckle towards the front of the headgear loosens the straps and will
lower the height of the headgear on the head.
Fig. 3
5. Lower the visor into the down position.
a. M-100, M-200 and M-300: Pull down on the loop located on the faceseal. Ensure the visor is fully
down and covering your face. The headgear should sit level on your head with the faceseal gently
hugging your face. If using the M-985 Earmuff Assembly or M-976 Head, Neck, and Shoulder
Cover, ensure it does not interfere with the faceseal. The elasticized edge of the faceseal should
come into contact with the skin under the chin and around the jaw.
b. M-400: Ensure visor is firmly closed (completely latched) in the down position. You should hear an
audible “click” when it is fully closed. Tighten the adjustable cord on the inner shroud until there is
less than a two finger gap between your skin and the inner shroud. Leave the outer shroud draped
over your shoulders.
6. If needed, adjust the airflow inside the headgear for wearing comfort. To adjust, raise the visor into
the up (open) position. Locate the blue air deflector in the front of the headgear and rotate. Fig. 4
shows where the air deflector is located. There are two positions. Adjust fully open for more airflow
across the face or partially closed to re-direct a portion of the air towards the visor. After adjusting the
air deflector, lower the visor back into the down position.
NOTE:
Do not adjust the air deflector while in a contaminated area.
Fig. 4
7. Complete any final performance checks required according to the
User Instructions
for your PAPR or
Supplied Air Unit before entering a contaminated area.
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