Sennheiser HME 26-2 User manual

Instruction manual
HME 26-2

Important safety instructions
HME 26-2 | 1
Important safety instructions
• Please read this instruction manual carefully and
completely before using the headset.
• Make this instruction manual easily accessible to all users
at all times.
• Always include this instruction manual when passing the
product on to third parties.
• The product is capable of producing sound pressure levels
exceeding 85 dB(A). In many countries 85 dB(A) is the
maximum legally permissible level for continuous noise
exposure during the working day. Exposure to sounds of
higher volume levels or for longer durations can
permanently damage your hearing!
• Never repair or attempt to repair a defective product
yourself. Contact your Sennheiser agent or the
Sennheiser Service Department.
• Only replace those parts of the product whose
replacement is described in this manual. All other parts
must be replaced by your Sennheiser agent.
• Protect the product from wetness. Use only a slightly
damp cloth for cleaning. For information on how to clean
the product, contact your Sennheiser agent.

Important safety instructions
2 | HME 26-2
Intended use
Intended use includes:
• having read and this instruction manual, especially the
chapter “Important safety instructions”.
• using the product within the operating conditions and
limitations described in this instruction manual.
Improper use
Improper use means using the product other than as
described in this instruction manual, or under operating
conditions which differ from those described herein.

The HME 26-2 headset
HME 26-2 | 3
The HME 26-2 headset
The HME 26-2 headset features dynamic, closed head-
phones. The noise-compensating condenser microphone en-
sures excellent speech transmission even in noisy environ-
ments. The headset has been designed for use in jet aircraft
cockpits.
Features
• Lightweight
• Extremely comfortable to wear due to the patented two-
piece automatic headband and soft ear pads
• Peak level protection (switchable) safeguards you from
volume peaks above 110 dB
• “Flip-away” headphone allows single-sided listening
• Flexible microphone boom, can be worn on either left or
right-hand side
• Noise-compensating condenser microphone ensures
excellent speech transmission
• Single-sided cable, easy to replace
• ETSO approval C139

Package contents
4 | HME 26-2
Package contents
1HME26-2headset
1 cable clip
1 wind and pop screen
1 instruction manual
1carrybag
1EASAForm1
Operation
Turning the microphone boom
The microphone boom can be rotated, allowing the micro-
phone to be worn on the left or right-hand side of the head.

Operation
HME 26-2 | 5
Putting on the headset
When putting on the headset, the patented two-piece
headband adjusts automatically.
Positioning the microphone
Bend the flexible microphone boom so that the microphone
is placed at the corner of the mouth. Maintain a distance of
2cm between microphone and mouth. Always use the
supplied wind and pop screen.

Operation
6 | HME 26-2
Flipping away one ear cup
The headset’s “flip-away” ear cup can be flipped backwards
by approx. 45°, allowing for singled-sided listening.
Adjusting the volume on the audio system
Connect the headset to the corresponding sockets of your
audio system.
왘Adjust the volume directly on the audio system.
CAUTION
Hearing damage due to high volumes!
This headset is capable of producing high sound
pressure levels. Higher volumes or longer durations
can damage your hearing!
왘Set the volume to a medium level. Make sure
that you can hear critical environmental sounds.
ca. 45°

Operation
HME 26-2 | 7
Adjusting the microphone sensitivity
The microphone sensitivity has been factory pre-set to
80 mV/Pa as per RTCA DO-214.
왘Turn a small screwdriver in the direction of the arrow to
change the microphone sensitivity.
Switching the p eak level protection on and off
The peak level protection safeguards your ears from volume
peaks above 110 dB, which can be transmitted via the audio
system or radio equipment.
왘Slide the switch for the peak level protection to the
desired position by using a pointed object:
+
–

Operation
8 | HME 26-2
Attaching the cable clip
The cable clip allows you to attach the headphone cable to
your clothing so that the cable doesn’t hinder or distract you.
왘Loop the cable through the clip so that the headphone
cable doesn‘t hinder you.
Position Function
up Peak level protection is switched off.
down Peak level protection is switched on
(factory default setting).

Care and maintenance
HME 26-2 | 9
Care and maintenance
Cleaning and maintaining the headset
왘Only use a soft, dry cloth to clean the product.
Replacing the ear pads
For reasons of hygiene, you should replace the ear pads at
least once annually.
왘Grasp the edge of the ear pad and pull sharply.
왘Attach the new ear pad to the ear cup by pressing firmly
around the ear pad until you hear all 12 latches lock into
place.
CAUTION
Liquids can damage the product!
Liquids entering the product can short-circuit the electronics
or damage the mechanics. Solvents or cleansing agents can
damage the surface of the product.
왘Keep all liquids far away from the product.