HME 26
Instruction manual
Safety instructions
y Please read these instructions carefully and
completely before using the headset.
y Make these instructions easily accessible to all users
at all times.
y Always include these instructions when passing the
headset on to third parties.
y The headset 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!
y Never repair or attempt to repair a defective headset
yourself. Contact your Sennheiser agent or the
Sennheiser Service Department.
y Only replace those parts of the headset whose
replacement is described in this manual. All other
parts of the headset must be replaced by your
Sennheiser agent.
y Protect the headset from wetness. Use only a slightly
damp cloth to clean the headset. For information on
how to clean the headset, contact your Sennheiser
agent.
1
Intended use of the headset
Intended use includes:
• having read this instruction manual especially the
chapter “Safety instructions”.
• using the headset in jet aircraft and within the
operating conditions as described in this instruction
manual.
Improper use
Improper use means using the headset other than as
described in this instruction manual, or under operating
conditions which differ from those described herein.
2
HME 26 headset
The HME 26 headset features dynamic, closed headphones. The noise-compensating condenser microphone
ensures excellent speech transmission even in noisy
environments. Designed for use in aircraft cockpits.
Features
y Lightweight
y Extremely comfortable to wear due to the patented
two-piece automatic headband and soft ear pads
y Peak level protection (switchable) safeguards you
from volume peaks above 110 dB
y “Flip-away” headphone allows single-sided listening
y Flexible microphone boom, can be worn on either left
or right-hand side
y Noise-compensating condenser microphone ensures
excellent speech transmission
y Single-sided cable, easy to exchange
y Volume control integrated in the cable (HME 26-V-K
only)
y ETSO approval C57a/C58a
3
Delivery includes
y 1 HME 26 headset
y 1 cable clip
y 1 wind and pop screen
y 1 instruction manual
y 1 carry bag
y 1 EASA Form 1
Operation
Turning the microphone boom
The microphone boom can be rotated. This allows the
headset to be worn with the microphone boom positioned
on either the left or right-hand side of the head.
4
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 approx. 2 cm between microphone and mouth.
Always use the supplied wind and pop screen.
5
Flipping away one earcup
The headset features a “flip-away” earcup for singlesided listening.
Adjusting the volume directly on the audio system
Connect the headset to the corresponding sockets of your
audio system. Adjust the volume directly on the audio
system.
CAUTION!
6
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!
Set the volume to a medium level. Make sure
that you can hear critical sounds such as
warning alarms.
Adjusting the volume via the slide volume controls
(HME 26-V-K only)
The two slide volume controls and allow you to
adjust the volume for the left and right channel
separately.
Changing the left and right audio channel
(HME 26-V-K only)
The position “R” or “L” of the BOOM switch
corresponds to the position of the microphone on the left
or right side of the mouth. When the microphone boom is
rotated to permit left or right side microphone
orientation, the BOOM switch allows you to correctly
assign the audio channels (L/R) to the appropriate
headphone sides. This enables the correct orientation of
the volume controls and any audio signals. To move the
BOOM switch, use a pointed tool.
7
Adjusting the microphone sensitivity
The microphone sensitivity has been factory pre-set to
80 mV/Pa as per RTCA DO-214. You can change the
microphone sensitivity by turning a small screwdriver in
the direction of the arrow.
+
–
Switching the peak 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. The peak level
protection is factory-preset to “on”. You can switch the
peak level protection off by gently sliding the switch to
the upper position using a pointed tool.
8
Care and maintenance
Cleaning the headset
Use a soft, slightly damp cloth to clean the headset from
time to time. If the headset is very dirty, use a cloth
dampened with mild, soapy water. Do not use any
solvents or cleansing agents.
CAUTION!
Replacing the earpads
For reasons of hygiene, the black earpads should be
replaced from time to time. Grasp the edge of the earpad
and pull sharply. Attach the new earpad to the earcup by
pressing firmly around the earpad until you hear the
12 latches lock into place. Repeat for the other earcup.
Danger of short-circuit due to the ingress of
water!
Water entering the housing of the headset
can cause a short-circuit and damage the
electronics.
9
Accessories and spare parts
By changing the cable, you can simply retrofit your
headset (see “Product variants” on page 11).
y Cable -C Cat. No. 500840
y Cable -K Cat. No. 500841
y Cable -N Cat. No. 500843
y Cable -V-K Cat. No. 500847
y MZQ 2002 cable clip Cat. No. 044740
y HZC 08 cable clip Cat. No. 525787
y Headband padding, 1 pair Cat. No. 515629
y Earpads, leatherette, 1 pair Cat. No. 529766
y Earpads, leatherette, 100 pairs Cat. No. 529767
y Earpads, velour, 1 pair Cat. No. 532724
y HZH 26 hygiene pads, 200 pairs Cat. No. 502595
y Wind and pop screen, 1 item Cat. No. 515297
y Wind and pop screen, any quantity Cat. No. 514127
y Carry bag Cat. No. 077408
10
Cable clips
HZC 08 MZQ 2002
(for round or flat cable)(for round cable only)
Product variants
Variant
(Cat. No.)
(Part Number)
HME 26*
(502395)
(026-55)
HME 26-K
(502396)
(026-55-999-0131)
* This is the headset supplied without a cable and must be used with
one of the cables listed above (see page 10)
Description Single-sided round
cable
Headset with
–
condenser
microphone
Headset with
condenser
microphone
with ¼“ (6.3 mm) jack
plug (headphones)
and PJ-068 equivalent
(microphone),
length 1.85 m
11
Connector assignment
HME 26-K
¼" (6.3 mm) jack plug PJ-068 equivalent
12 3
1
Audio Hi
2
not assigned
3
Audio Lo
Cable -C
Solder side
3
2
1
Cable -N
Solder side
12
1
4
Audio Hi
2
Audio Lo
3
Microphone Hi
5
4
Microphone Lo
5
not assigned
1 Audio Hi
2 Audio Lo
3 not assigned
4 Microphone Lo
5 Microphone Hi
6 not assigned
7 not assigned
8 not assigned
12 3
1
not assigned
2
Microphone Hi
3
Microphone Lo
Cable -V-K
¼" (6.3 mm) jack plug PJ-068 equivalent
12 3
1
Audio Hi left
2
Audio Hi right
3
Audio Lo
12 3
1
not assigned
2
Microphone Hi
3
Microphone Lo
13
Specifications HME 26 headsets
Headphones
Transducer principle dynamic, closed
Ear coupling supra-aural
Frequency response 20–14,000 Hz
Impedance mono/stereo 600 Ω/1,200 Ω
Characteristic SPL 92 dB SPL at 1 kHz, 1 mW, mono
97 dB SPL at 1 kHz, 1 V
Max. SPL 120 dB SPL at 1 kHz
(peak level protection = ON)
> 125 dB SPL at 1 kHz
(peak level protection = OFF)
THD < 1 % at 110 dB SPL
(350–3,000 Hz)
Contact pressure approx. 3.6 N
Microphone
Type MKE 46
Transducer principle pre-polarized condenser
microphone,
noise-compensating
Frequency response 100–6,000 Hz
Output voltage adjustable from 17–100 mV/Pa,
80 mV/Pa -2 dB
(factory pre-set)
800 mV -2 dB at 114 dB SPL
Terminating impedance 150–2,200 Ω
Supply voltage 8–16 V DC
14
General data
Temperature range operation: –15 °C to 55 °C
storage: –55 °C to 70 °C
Weight without cable approx. 200 g
15
Manufacturer Declarations
Warranty
Sennheiser electronic GmbH & Co. KG gives a warranty of 5 years on this
product.
For the current warranty conditions, please visit our web site at
www.sennheiser.com or contact your Sennheiser partner.
CE Declaration of Conformity
This equipment is in compliance with the essential requirements and other relevant provisions of Directive 89/336/EU.
The declaration is available at www.sennheiser.com.
Before putting the device into operation, please observe the respective
country-specific regulations!
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