Instruction/ maintenance manual of the product 250 Sennheiser
Go to page of 26
Bedienungsanleitun g Instruction Manual Notice d‘emploi Istruzioni per l‘uso Instrucciones de uso Gebruiksaanwij zing HMEC 250 HMEC250_516578_050 7_SP6.
1 Contents Important safety instructions ..... ...... ........... .............. ............... 2 Delivery includes ...... .............. .............. ........... .............. ............... 4 The HMEC 250 headset .................... ..........
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 .
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.
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.
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.
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.
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.
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.
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 .
24 CE Declaratio n of Conformity This equipment is in compliance with the essential requirements and other relevant provisions of Directive 89/ 336/EU.
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.
An important point after buying a device Sennheiser 250 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Sennheiser 250 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Sennheiser 250 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Sennheiser 250 you will learn all the available features of the product, as well as information on its operation. The information that you get Sennheiser 250 will certainly help you make a decision on the purchase.
If you already are a holder of Sennheiser 250, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Sennheiser 250.
However, one of the most important roles played by the user manual is to help in solving problems with Sennheiser 250. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Sennheiser 250 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
