8. Check the fit of each earplug by moving a
cupped hand near the ear. The user
should not perceive any change in sound
level. If the sound level changes, this indi-
cates an improper seal; repeat Steps 4-6
with new foam tips. If the foam tips still do
not seal properly, repeat steps 4-6 with
the next larger foam tip size. If the foam
tips still do not seal properly, consult the
local hearing conservation officer.
If you are not wearing a CB protective
mask, do not perform Steps 9 and 10.
The CEP extension cable (CEP199-X01)
should be used only with a CB protec-
9. If the M45 mask is to be worn, refer to
Figure 2-8.2 and connect the CEP (1) to
the extension cable (2). Then, don the
10. If the M45 mask is worn, refer to Figure
2-8.3 and connect the extension cable (2)
to the helmet connector (1) before don-
ning the helmet.
11. Don the helmet.
12. If the M45 mask is NOT worn, and you
have NOT performed Steps 9 and 10,
refer to Figure 2-8.3 and grasp the CEP
connector end (3) with the right hand.
Push the connector end onto the connec-
tor (1) on the right rear of the helmet.
Ensure that the volume level of the audio
sent to the CEP is reduced. Damage to
the wearers ears may result if the volume
level is not reduced.
13. Rotate the intercommunications unit
volume level to full off.
14. Plug the communications cord into the in-
tercommunications unit. Check for proper
operation of the CEP and the receivers
while slowly increasing the volume to a
Figure 2-8.2. CEP Connected
to Extension Cord
Figure 2-8.3. Connecting CEP to Helmet
2-12.2 Change 3