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.

Care and maintenance
10 | HME 26-2
Replacing the headband paddings
For reasons of hygiene, you should replace the headband
paddings at least once annually.
왘Pull the Ziploc type fastening strips of the old headband
paddings apart.
왘Put the new headband paddings around the headbands.
왘Attach the new headband paddings by joining the
fastenings strips.
The tongue and groove of the fastening strips click into
place.

Accessories and spare parts
HME 26-2 | 11
Accessories and spare parts
By changing the cable, you can simply retrofit your headset
(see “Product variants” on page 12).
Accessories
• Cable -C Cat. No. 500840
• Cable -K Cat. No. 500841
• Cable -N Cat. No. 500843
• Hygiene pads HZH 26, white, Cat. No. 502595
200 pairs
• Hygiene pads HZH 26, black, Cat. No. 504062
200 pairs
Spare parts
• Ear pads, leatherette, 1 pair
• Ear pads, leatherette, 100 pairs
• Ear pads, velour, 1 pair
• Headband padding, large, 1 item
• Headband paddings, small, 1 pair
• Wind and pop screen, 1 item
•Windandpopscreen, any quantity
•Carrybag
• Cable clip HZC 08
Cable clip
HZC 08
for round cables

Product variants
12 | HME 26-2
Product variants
Model Cat. No. /
Part Number
Description Cable
HME 26-2 505698 /
026-55-2
Headset with
condenser
microphone
The headset can be
combined with all
cables (see page 11).
HME 26-2-K 505699 /
026-55-2-
999-0131
Headset with
condenser
microphone
Single-sided round
cable with ¼“
(6.3 mm) jack plug
(headphones) and
PJ-068 equivalent
(microphone),
length 1.85 m

Connector assignment
HME 26-2 | 13
Connector assignment
HME 26-2-K
Cable -C
Cable -N
¼" (6.3 mm) jack plug PJ-068 equivalent
1
2
3
Audio Hi
not assigned
Audio Lo
1
2
3
not assigned
Microphone Hi
Microphone Lo
12 3 12 3
Solder side
1
2
3
Audio Hi
Audio Lo
Microphone Hi
4
5
1
234
5
Microphone Lo
not assigned
Solder side 1 Audio Hi
2 Audio Lo
3 not assigned
4 Microphone Lo
5 Microphone Hi
6 not assigned
7 not assigned
8 not assigned

Specifications
14 | HME 26-2
Specifications
Headphones
Transducer principle dynamic, closed
Ear coupling supra-aural
Frequency response 20 to 14,000 Hz
Impedance 600 Ω mono/1,200 Ω stereo
Characteristic SPL 92 dB SPL at 1 kHz, 1 mW, mono
97 dB SPL at 1 kHz, 1 V
Max. SPL peak level protection switched on:
120 dB SPL at 1 kHz
peak level protection switched off:
> 125 dB SPL at 1 kHz
THD < 1% at 110 dB SPL
(350 to 3,000 Hz)
Contact pressure approx. 3.9 N
Microphone
Type BKE 46
Transducer principle pre-polarized condenser microphone,
noise-compensating
Frequency response 100 to 6,000 Hz
Output voltage adjustable from 17 to 100 mV/Pa, 80 mV/Pa -2 B
factory preset : = 800 mV - 2 dB at 114 dB SPL
Terminating impedance 150 to 2,200 Ω
Supply voltage 8 to 16 V DC
General data
Temperature range operation: -15 °C to 55 °C
storage: -55 °C to 70 °C
Weight without cable approx. 205 g

Manufacturer Declarations
HME 26-2 | 15
Manufacturer Declarations
Warranty
Sennheiser GmbH & Co. KG gives a warranty of 5 years on this
product.
For the current warranty conditions, please visit our website
at www.sennheiser-aviation.com or www.sennheiser.com or
contact your Sennheiser partner.
CE Declaration of Conformity
• EMV Directive (2004/108/EC)
• RoHS Directive (2011/65/EC)
The declaration is available at www.sennheiser.com.
In compliance with:
Europe EMC EN 55103-1/-2
China

Manufacturer Declarations
16 | HME 26-2
China RoHS
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Manufacturer Declarations
HME 26-2 | 17
FCC User Information
NOTE: This equipment has been tested and found to comply
with the limits for a Class B digital device of the FCC Rules,
pursuant to part 15 of the FCC Rules and ICES 003 of Industry
Canada. These limits are designed to provide reasonable
protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful
interference to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more
of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/ TV technician
for help.
Changes or modifications made to this equipment not
expressly approved by Sennheiser electronic Corp. may void
the FCC authorization to operate this equipment.

Manufacturer Declarations
18 | HME 26-2

Sennheiser electronic GmbH & Co. KG
Am Labor 1, 30900 Wedemark, Germany
www.sennheiser-aviation.com | www.sennheiser.com
Printed in Germany, Publ. 12/12, 548065/A01