HMEC 26 Instruction manual
Safety instructions y Please read these instructions carefully completely before using the headset. and 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 During flight operation, do not use the headset for telephone calls. y With the NoiseGard™ active noise compensation switched on, typical aircraft sounds (for example, those from engines, propellers, warning alarms, etc.) may sound different to you.
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 humidity. Use only a slightly damp cloth to clean the headset. For information on how to clean the headset, contact your Sennheiser agent. Intended use of the headset Intended use includes: • • having read this instruction manual especially the chapter “Safety instructions”.
The HMEC 26 headset The HMEC 26 headset with NoiseGard™ active noise compensation features dynamic, closed headphones. The noise-compensating condenser microphone ensures excellent speech transmission even in noisy environments. Designed for use in aircraft cockpits.
y ETSO approval C57a/C58a Delivery includes y 1 HMEC 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.
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.
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! 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.
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.
The operating controls of the HMEC 26 Operating control I Volume controls LED NoiseGard™ ON/OFF switch Mono/stereo switch BOOM switch L/R 3.5 mm jack socket Battery compartment 2.
Operating control II Headset with operating control II LED NoiseGard™ ON/OFF switch Operating element HMEC 26-CP x x HMEC 26-KP x x HMEC 26-NP x x 9
Using the headset Switching NoiseGard™ on/off The NoiseGard™ ON/OFF switch allows you to switch the NoiseGard™ active noise compensation on or off. With NoiseGard™ switched off, the headset can be used as a conventional headset. 왘 Set the NoiseGard™ ON/OFF switch to the desired position: ON: NoiseGard™ is switched on. The LED lights up, indicating the battery charge status (see page 11) or power supply via the aircraft DC power supply system. OFF: NoiseGard™ is switched off. The LED is off.
Switching between mono and stereo mode The mono/stereo switch allows you to switch between mono ( ) and stereo ( ) mode, depending on the audio system. 왘 Set the mono/stereo switch to the desired position: mono ( ) or stereo ( ). Changing the left and right stereo channel 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.
The operating time with batteries/rechargeable batteries is approx. 60 hours. With NoiseGard™ switched on (see page 10), the LED provides information on the remaining battery/ rechargeable battery capacity. LED lights up yellow: The battery capacity is sufficient. LED lights up red: The batteries are flat. Replace the batteries.
Switching the TalkThrough function on/off (HMEC 26-T only) The headset provides excellent attenuation of ambient noise. In order to allow you to communicate undisturbed with your surroundings while wearing the headset, the HMEC 26-T features a TalkThrough function. 왘 Press the TalkThrough button to switch the TalkThrough function on. The LED lights up. Press the TalkThrough button again to switch TalkThrough off.
Connecting a mobile telephone The 2.5 mm jack socket allows you to connect a mobile telephone. For this purpose, the NoiseGard™ active noise compensation must be switched on and the microphone connector must be connected to the aircraft radio/audio. A suitable adapter for your mobile telephone with 2.5 mm jack socket is available from your Sennheiser agent.
Connecting an additional audio player The 3.5 mm jack socket allows you to connect and listen to an audio player (not supplied) through the headset. For this purpose, the NoiseGard™ active noise compensation must be switched on. CAUTION! Danger of accident due to reduced attention! Listening to music or operating an audio device limits your attention and may cause accidents.
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! 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. Replacing the earpads For reasons of hygiene, the earpads should be replaced from time to time.
Accessories and spare parts By changing the cables, you can simply retrofit different operating controls (see page 8 and 9) or connectors (see page 19) to your headset. y y y y y y y y y y y y y y y y y y y y y Cable -CP Cable -V-CP Cable -B-CP Cable -BV-CP Cable -KP Cable -V-KP Cable -B-K Cable -BV-K Cable -BV-KP Cable -NP Cable -V-RP Cable -V-KX Audio cable, length 0.6 m, with two 3.5 mm stereo jack plugs Audio cable, length 0.6 m, with two 2.
y Cable clip MZQ 2002 y Cable clip HZC 08 Cat. No. 044740 Cat. No.
Product variants Model HMEC 26* HMEC 26-T* HMEC 26-CP HMEC 26-V-CP HMEC 26-B-CP HMEC 26-BV-CP HMEC 26-KP HMEC 26-V-KP HMEC 26-B-K HMEC 26-BV-K HMEC 26-NP HMEC 26-V-RP HMEC 26-V-KX HMEC 26-BV-KP Cat. No.
Specifications Headphones Transducer principle Ear coupling Frequency response Impedance Characteristic SPL dynamic, closed supra-aural 20–14,000 Hz 600 Ω mono/1.200 Ω stereo 92 dB SPL at 1 kHz, 1 mW, mono 95 dB SPL at 1 kHz, 1 V Max. SPL 120 dB SPL at 1 kHz Active noise compensation ≥ 18 dB (100 – 300 Hz) THD < 1 % at 1 kHz, 95 dB SPL Contact pressure approx. 3.6 N Microphone incl.
General data Temperature range operation: –15 °C to +55 °C storage: –55 °C to +70 °C approx. 210 g 2x 1.5 V AA alkaline battery (IEC LR 6) or 2x 1.2 V AA rechargeable battery (IEC LR 6) with approx. 60 hrs operating time or 12–35 V DC via aircraft DC power supply system (on suitably equipped aircraft), max. 35 mA Weight without cable Power supply for NoiseGard™ Connector assignment HMEC 26-V-KX ¼" (6.
HMEC 26-CP, -V-CP, -B-CP, -BV-CP Solder side 2 3 4 5 1 1 2 3 4 5 Audio Hi Audio Lo / DC– Microphone Hi Microphone Lo NoiseGardTM (DC+) HMEC 26-NP Solder side 1 2 3 4 5 6 7 8 Audio Hi Audio Lo not assigned Microphone Lo Microphone Hi not assigned DC– NoiseGardTM (DC+) HMEC 26-V-RP Solder side 1 2 3 22 1 2 5 3 4 4 5 6 6 NoiseGardTM (DC+) Audio Lo / DC– Audio Hi left Audio Hi right Microphone Hi Microphone Lo
HMEC 26-KP, -V-KP, -BV-KP, -B-K, -BV-K 1/4" (6.
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 2004/108/EU. The declaration is available on the internet site at www.sennheiser.com.
Sennheiser electronic GmbH & Co. KG Am Labor 1, 30900 Wedemark, Germany www.sennheiser.com Printed in Germany Publ.
