Intended Use - 3M PELTOR CH-3 FLX2 Manual

3M™ PELTOR™ CH-3 FLX2 Headset
MT74H52 (all product variants)-110 (Microphone)
MT74H52 (all product variants)-111 (Microphone and PTT)
HT52 (all product variants)-112 (Listen only)
1. INTRODUCTION
Congratulations and thank you for choosing 3M™ PELTOR™
communication solutions! Welcome to the next generation of
protective communication.

1.1. INTENDED USE

These 3M™ PELTOR™ headsets are intended to provide
workers with protection against hazardous noise levels and
loud sounds while allowing the user to listen or communicate
with connected communication devices. It is expected that all
users read and understand the provided user instructions as
well as be familiar with the use of this device.
2. SAFETY
2.1. IMPORTANT
Please read, understand, and follow all safety information in
these instructions prior to use. Retain these instructions for
future reference. For additional information or any questions,
contact 3M Technical Services. Refer to contact information
listed on the last page of this manual.
2.2. INTRINSIC SAFETY
The 3M™ PELTOR™ CH-3 FLX2 Headset, HT52A -112-50,
HT52B -112-50 and HT52P3E -112-50 has been certified to
be intrinsically safe for use in potentially explosive
atmospheres. The user is responsible for ensuring that the
3M™ PELTOR™ CH-3 FLX2 Headset and accessories are
used in the appropriate atmospheres as defined by the
approved area classifications and according to the user
instructions. Failure to do so may result in serious injury or
death. For approved area classifications and more
information about Intrinsic Safety, refer to separate Safety
Guide included in the packaging of the product.
If there is any risk that the safety or integrity of the unit has
been compromised, the unit must be taken out of operation
immediately and removed from the potentially explosive
atmosphere without delay. Action must be taken to prevent
the device from being accidentally placed into operation
again. Contact 3M Technical Services for service and repair.
!
WARNING
To reduce the risk of igniting an explosion which, if not
avoided, could result in serious injury or death:
• Ensure that the 3M™ PELTOR™ CH-3 FLX2 Headset,
and any intrinsically safe accessories are only used and
stored in the classified areas consistent with the marked
equipment ratings.
• Never connect electronic components or devices to the
headset in a potentially explosive environment.
• Only connect the 3M™ PELTOR™ Spare Parts and
Accessories listed in the separate Safety Guide included
in packaging of the product to the headset.
SUBSTITUTION OF COMPONENTS MAY IMPAIR
INTRINSIC SAFETY.
• Only use 3M™ PELTOR™ Authorized Service Centers for
service and repair.
• Do not use headset or accessories if they are damaged or
malfunctioning in any way.
!
WARNING
• This hearing protector helps reduce exposure to
hazardous noise and other loud sounds. Misuse or failure
to wear hearing protection at all times when exposed to
hazardous noise may result in hearing loss or injury. For
correct use, consult supervisor and User Instructions, or
call 3M Technical Services. If your hearing seems dulled or
you hear a ringing or buzzing during or after any noise
exposure (including gunfire), or for any other reason you
suspect a hearing problem, leave the noisy environment
immediately and consult a medical professional and/or
your supervisor.
Failure to follow these instructions may result in serious
injury or death:
• Listening to audio communication may reduce your
situational awareness and ability to hear warning signals.
Stay alert and adjust the audio volume to the lowest
acceptable level.
• To reduce the risks associated with igniting an explosion,
do not use non-intrinsic safe products and accessories in
a potentially explosive atmosphere.
Failure to follow these instructions may reduce the
protection provided by the earmuff and may result in
hearing loss:
• 3M strongly recommends personal fit testing of hearing
protectors. Research suggests that users may receive less
noise reduction than indicated by the attenuation label
value(s) on the packaging due to variation in fit, fitting skill,
and motivation of the user. Refer to applicable regulations
or guidance on how to adjust attenuation label values. In
the absence of applicable regulations, it is recommended
that the attenuation rating be reduced to better estimate
typical protection.
• U.S. EPA specifies the NRR as the measure of hearing
protector noise reduction. However, 3M makes no
warranties as to the suitability of the NRR for this purpose.
3M strongly recommends personal fit testing of hearing
protectors. Research suggests that users may receive less
noise reduction than indicated by the attenuation label
value(s) on the packaging due to variation in fit, fitting skill,
and motivation of the user. Refer to applicable regulations
or guidance on how to adjust attenuation label values. It is
recommended that the NRR be reduced by 50% to better
estimate typical protection.
• Ensure the hearing protector is properly selected, fit,
adjusted, and maintained. Improper fit of this device will
reduce its effectiveness in attenuating noise. Consult the
enclosed instructions for proper fit.
• Inspect the hearing protector before each use. If damaged,
select an undamaged hearing protector or avoid the noisy
environment.
• When additional personal protective equipment is
necessary (e.g. safety glasses, respirators, etc.), select
flexible, low profile temples or straps to minimize
interference with the earmuff cushion. Remove all other
unnecessary articles (e.g. hair, hats, jewelry, headphones,
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