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Sennheiser 250 manual

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Table of contents for the manual

  • Page 1

    Bedienungsanleitun g Instruction Manual Notice d‘emploi Istruzioni per l‘uso Instrucciones de uso Gebruiksaanwij zing HMEC 250 HMEC250_516578_050 7_SP6.book Seite 1 Mittwoch, 13. Juni 2007 3:18 15[...]

  • Page 2

    1 Contents Important safety instructions ..... ...... ........... .............. ............... 2 Delivery includes ...... .............. .............. ........... .............. ............... 4 The HMEC 250 headset .................... .............. ............ .............. ... 5 Operating elements ....................... ............ ....[...]

  • Page 3

    2 Important safety instructions y Please read these instructio ns carefully and completely before using the headset. y Make these instructions easily accessible to all users at all times. Always include these instructions when passing the headset on to third part ies. y During flight operation, do not use the headset for telephone calls. y With the[...]

  • Page 4

    3 Safety instructions for batteries If abused or misused, batter ies may leak and, in extreme cases, may even pre sent an explosion and fi re hazard . Sennheiser does not accept any liability for damage arising from abuse or misuse. Ke ep batterie s out of reach and out of sight of children. Observe correct polarity. Do not heat or throw into fire.[...]

  • Page 5

    4 Intended use of the headset Intended use includes: y having read these instructions, especially the chapter “Important safety in structions ” on page 2, y using the headset withi n the operating c onditions and limitations desc ribed in this instructi on manual. Improper use means using the headset other than as described in these inst ructio[...]

  • Page 6

    5 The HMEC 250 headset The HMEC 250 headset with NoiseGa rd 2.0 active noise compensation features closed , dynamic, circumaural stereo headphones. The HMEC 250 is a headset for general aviation use. NoiseGard 2.0 The NoiseGard 2.0 active noise compensation system is based on the principle of canc elling out so und using “an ti- sound” (phase-i[...]

  • Page 7

    6 Ta l k T h r o u g h f u n c t i o n The TalkThrough fun ction allows you t o communicate w ith the people around you while wearing the headset. The NoiseGard 2.0 active noise comp ensation and the peak level protect ion remai n unaffe cted by t he TalkT hrough fu nction and help to protect your hearing. Additional features y Outstanding transmis[...]

  • Page 8

    7 Operating elements Headset  Microphone sensitivity contro l  Headp hone c able  Microphone boom  Earpads  Headband  Battery compartment (on both sides) Operating co ntrol integr ated in the headset  TT VOLUME + button  ON/OFF button (Noi seGard 2.0)  TT VOLUME – button  TalkThrough button  LED Operating control [...]

  • Page 9

    8 LED indications Meanings of the LED  :  LED Meaning red NoiseGard 2.0 operation green T alkThrough operation flashing Batteries are almost flat HMEC250_516578_050 7_SP6.book Seite 8 Mittwoch, 13. Juni 2007 3:18 15[...]

  • Page 10

    9 Preparing the headset for use Inserting the batte ries Insert the batteries into the battery compartments on the left and right earcu ps as follows: 왘 Open the battery compartment  by pushing the catch and open the cover. 왘 Insert the AAA size battery a s shown in the diagram on the left. Please observe correct polarity when inserting the [...]

  • Page 11

    10 Connecting a mobile telephone The 2.5 mm jack socket  allows you to connect a mobile telephone. For this purpose, the microphone plug  must be connected to the aircraft radio/intercom. A suitable adapter for your mobile telephone with 2.5 mm ja ck socket is available from your Sennheiser agent. Note: For the latest list of co mpatible mobi[...]

  • Page 12

    11 Connecting an additiona l audio player The 3.5 mm jack socket  allows you to connect and listen to an additional audio pl ayer (e.g. MP3 player) through the headset. 왘 Connect the audio cable to the 3.5 mm jack socket  on the operating control and to the corresponding jack socket on your audio player. 왘 Switch NoiseGard 2.0 on (see “[...]

  • Page 13

    12 Adjusting the mi crop hone sensitivity The microphone sensitivity has been factory pre-set to 40 mV/Pa as per RTCA DO-214. T o chang e the input sens itivity of the m icrophone: 왘 Use a suitable s lotted screwdriver. 왘 T urn the microphone sensitivity con trol  as shown. Switching between mono and stereo mode The mono/stereo switch  al[...]

  • Page 14

    13 Using the headset Attaching the cable clip The cable clip  allows you to attach the headphone cable  to your clothing so that the cable doesn’t hin der or distract you. 왘 Guide the headphone cable  through the cable clip  . 왘 Attach the cable clip  t o your clothin g. Adjusting the headset 왘 W ear the headset so that – t[...]

  • Page 15

    14 왘 Bend the microphone boom  s o t ha t t he mi cr op ho n e is placed at the corn er of the mouth. Maint ain a distance of approx. 2 cm between micr ophone and mouth. Adjusting the volume You can adjust the volume dire ctly on the intercom or via the operatin g control inte grated into the cable. To adjust the volume for the left or ri ght [...]

  • Page 16

    15 Switching the T alkThrough fu nction on/off The HMEC 250 provides excellent attenuation of ambient noise. In order to allow yo u to communicate undistur bed with your surroundings while weari ng the headset, the HMEC 250 features a TalkThrough function. 왘 Press the T alkThrough button  t o s w i t c h t h e T alkThrough function on or off. [...]

  • Page 17

    16 Switching No iseGard on/off T o switch the NoiseGard™ 2.0 active noise compensation on or off: 왘 Press the ON/OFF button  for approx. one second. When NoiseGard 2.0 is switched on: –t h e L E D  lights up red and – you can listen to music and make telephone calls at the same time . Fail safe ope ration When the batteries are comple[...]

  • Page 18

    17 Replacing the batteries When the batteries are almost flat, the LED  flashes. When the batteries are co mpletely discharged, the NoiseGard 2.0 active noise compensation auto matically switches off (fail safe operation). Replace th e battery as follows: Note: Always replace the two batteries at the same time. 왘 Open the battery compartment ?[...]

  • Page 19

    18 Folding up the headset For space-s aving transportation, the headset can be folded up in different ways: T o fold up the headphones as flat as possible: 왘 Rotate the earcups by 90° and turn the micr ophone boom flat as shown. T o fold up the headphones as compact as possible: 왘 T uck the earcups between the headband as shown. For safe trans[...]

  • Page 20

    19 Care and maintenance 왘 Use a sof t, slightly damp cloth to clean the headset from time to time. Replacing the earpads You can replace the earpads. Spare earpads are avai lable as accessories (see “Accessories and spare parts” on page 20). 왘 Grasp the edge of t he earpad  behind the earcup and peel it up and away from the earcup. 왘 P[...]

  • Page 21

    20 Replacing the wind shield You can replace the wind shield. The HMEC 250 is sup plied with a spare wind shield. 왘 Carefully pull the wind shield  from the microphone. 왘 Slide-on the new wind shield  and ensur e that it fit s securely over the microphone. Accessories and spare parts Cat. No. Accessories/Spare parts 523889 Earpads (1 pair[...]

  • Page 22

    21 Specifications General data W eight without cable approx. 285 g T empera ture range (operation) -10 to +55 °C T emperature range (storage) -55 to +55 °C Power supply for NoiseGard 2 x 1.5 V AAA size battery or 2 x 1.2 V AAA size rechargeable battery Cable length 1.85 m Headphone connector ¼” (6.35 mm) jack plug Microphone connector 5.25 mm [...]

  • Page 23

    22 Sound pressure level pas sive 98 dB at 1 kHz, 1V active 100 db at 1 kHz, 1 V THD at 94 dB SPL < 1 % Attenuation 13–34 dB passive attenua tion, p lus 16–25 dB active noise compensation at low frequencies Contact pressure approx. 5 N Microphone incl. preamplifier T ype MKE 46 T ransducer principle pre-polarized condenser microphone, noise-c[...]

  • Page 24

    23 Manufacturer declarations W arranty regulations The guarantee period for this Sennheiser product is 3 years from the date of purchase. Excluded are accesso ry items, rechargeable or dis posable ba tteries that are deli vered with the product; due to their characteristics these products have a shorter service life that is principally dependent on[...]

  • Page 25

    24 CE Declaratio n of Conformity This equipment is in compliance with the essential requirements and other relevant provisions of Directive 89/ 336/EU. The declaration is available on the i nternet site at www.sennheiser.com. Before putting the devi ce into operation, please observe th e respective country-specific regulati ons! WEEE Declaration Yo[...]

  • Page 26

    Sennheiser electronic GmbH & Co. KG 30900 Wedemark, Germany Phone +49 (5130) 600 0 Fax +49 (5130) 600 300 www.sennheiser.com Printed in China Publ. 0 6 /07 516578/A0 2 HMEC250_516578_050 7_SP6.book Seite 1 Mittwoch, 13. Juni 2007 3:18 15[...]