TwinCom EM2140DC-S, AK5850HS, AK5850S User Manual
Title: TwinCom Doc. 1, Rev. 2, 20.11.2011 12ATEX1277 and 03ATEX1351
Document name: User manual Offshore ear plug EM2140DC-S and headset AK5850HS and AK5850S
Contents
1. Offshore ear plug EM2140DC-S
a) Introduction
b) Before use
c) Right and left orientation
d) How to place and remove the ear plug
e) Correct placement
f) How to connect the earplug into the earmuffs
g) The complete setup
h) Cleaning/maintenance
i) Sound attenuation and mass
j) ATEX approval
2. Headset AK5850S (helmet attachment) AK5850HS (headband)
a) Introduction
b) How to adjust the headset before use
c) How to connect the headset to a 2-way radio
d) How to connect the headset to the Offshore Ear Plug
e) Maintenance and storage
f) Sound attenuation data and mass
g) ATEX approval
3. General information about the Offshore Ear Plug EM2140DC-S and the Headset AK5850S and
AK5850HS
a) Sound attenuation
b) Maximum electrical input (AUX)
c) Testing and manufacturing
1. a) Introduction Offshore ear plug
EM2140DC-S
– custom made hearing protection
Congratulation with your new custom made Offshore earplug! This product is molded to fit your ears and
has built in communication used together with a PTT-unit and radio.
The Offshore earplug can be used together with earmuffs or together with a PTT-unit.
To ensuere correct use and to get all the advantages of the product, please read this manual carefully.
Wrong use can cause hearing damages. The hearing protection shall be worn at all times in noisy
invironments. Be aware of that this ear plug is personally molded to fit your ears. Since the shape of the inner
ear is changing it is recommended to take new molds every 4th year to ashieve the best attenuation.
The Offshore Ear Plug is made of medical grade Flexit (polydimetylsilikosan) and the cable is made of medical
grade PUR (polyurethane) wich will decrease the danger of alergic reactions.
Warning: If the recommendations in this user manual is not adhered to , the protection of this PPE may be
severly impaired!
1. b) Before use
Before use, please be sure of that the ear plugs are clean. If necessary use the enclosed brush or cleaning
pin to remove wax and other pollution from the sound opening. A small quantity of Otoferm-cream in the ear
can make it easier to make a correct placement of the ear plug.
If you use the ear plug wrong it may give poor protection and sound quality. Be sure of that the Offshore ear
plug always is placed correct and remember to use the hearing protection at all time in noisy environments.
After a period of 3-4 years the shape of the inner ear are changing and the attenuation can be reduces.
It will then be necessary to renew the offshore ear plug.
1. c) Right and left orientation
The Offshore ear plugs are marked with a red dot for right ear and a blue dot for
left ear. The small handle on the plug shall be on top side when it shall be slided
into the ears. The cable shall point upwards, just in front of the upper ear.
1. d) How to place the earplug into the ear
Seize the small handle on the impression between your index finger and thumb. The cable shall point upwards
in front of the ear.
Tread the earplugs sound opening into the ear with rotating motions until it feels comfortable. At last make a
light pressure by index finger on the earplug until the plug is toroughly into the ear. It is important to not use
force.
1. e) How to remove the plug from the ear
Seize the small handle on the impression and pull by a slightly forward rotation.
1. f) Correct placement
The Offshore earplug make a tight connection to the ear without being
uncomfortable ore make a pressure in the ear.
It may take some weeks to get used to the ear plug.
Please take contact with Safe Sound Audio AS if you get lasting problems.
1. g) How to connect the ear plug into the earmuffs
The Offshore earplug shall preferably be used together with AK5850S earmuffs to
get maximum protection.
Connect the ear plugs jack connector into the inlet on the left cup of the earmuffs.
The earplugs may also be used without the earmuffs, but then you need an edition
with military Nexus jack plug. This ear plugs has to be connected to an external PTTunit made for the different brands of UHF/VHF-radios. Ask your supplier for information. Warning: Do not
connect or disconnect the device to the ear muffs or the PTT unit or switch on/off the radio while the equipment
are placed in the ears. It is also important that the interconnecting cable is not damaged. Shortcuts or other
disturbance may course high noise that can damage the hearing. The electrical audio output of this hearing
protector may exceed the daily limit sound level. Electric input level for which the mean plus one standard
deviation When the offshore Earplug is used alone the A-weighted diffuse-field related sound pressure level is
equal to 82 dB at 79,3 dBµV. Be careful with the volume control!
1. h) The complete setup
The earmuffs shall be placed on the ear outside the earplugs. The cables shall be
between the ear muffs and the skin just in front of the upper ear. Warning: These
ear-plugs should not be used where there is a risk that the connecting cord could
be caught up during use.
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