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Table of Contents
Related Manuals for Sennheiser HMEC 250 - 05-10
Summary of Contents for Sennheiser HMEC 250 - 05-10
- Page 1 HMEC 250 Headset for general aviation Instruction manual...
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Page 2: Table Of Contents
Adjusting the microphone boom ........13 Adjusting the volume ............13 Switching the TalkThrough function on/off ....14 Adjusting the volume of the TalkThrough function ..14 Switching NoiseGard on/off ..........15 Replacing the batteries ............. 16 Folding up the headset ............17 Care and maintenance ............. -
Page 3: Important Safety Instructions
Important safety instructions • Please read this instruction manual carefully and completely before using the headset. • Make these this instruction manual easily accessible to all users at all times. Always include this instruction manual when passing the headset on to third parties. - Page 4 Safety instructions for batteries If abused or misused, batteries may leak and, in extreme cases, may even present an explosion and fire hazard. Sennheiser does not accept any liability for damage arising from abuse or misuse. Keep batteries out of Observe correct reach of children.
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Page 5: Delivery Includes
2 Wind and pop shields for MZW 46 1 audio-in cable for mobile telephones, length 0.6 m, with two 2.5 mm jack plugs 1 audio-in cable for additional audio players, length 0.6 m, with two 3.5 mm jack plugs 2 AAA size batteries... -
Page 6: The Hmec 250 Headset
(up to 1 kHz) near the ear. The NoiseGard 2.0 electronics use this noise to generate a sound wave which is the exact opposite (i.e.: at the same level but polarity reversed – 180° out-of-phase), the result is that the polarity reversed signal cancels most of the outside noise. - Page 7 • Noise-compensating boom microphone ensures excellent speech transmission • Flexible microphone boom • Separate left and right channel volume control • Excellent comfort resulting from soft ear pads and head- band padding • Audio-input facility for external audio sources, such as mobile phones, MP3 players...
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Page 8: Operating Elements
Headset cable Cable with headphone plug, Microphone boom ¼” (6.35 mm) jack plug Ear pads, ergonomic 3.5 mm jack socket for connecting an Headband additional audio player (3-pin) Battery compartment (on both sides) 2.5 mm jack socket for connecting a... -
Page 9: Putting The Headset Into Operation
Batteries are almost flat Putting the headset into operation Inserting the batteries Insert the batteries into the battery compartments on the left and right ear cups as follows: Open the battery compartment by pushing the catch and open the cover. -
Page 10: Connecting A Mobile Telephone
„Professional Audio“ > „Aviation Headsets“ section on our website at www.sennheiser.com. Connect the audio cable to the 2.5 mm jack socket (3-pin) on the operating control and to the corresponding jack socket on your mobile telephone (4-pin). -
Page 11: Connecting An Additional Audio Player
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. Switch NoiseGard on (see “Switching NoiseGard on/off” on page 15). -
Page 12: Adjusting The Microphone Sensitivity
Turn the microphone sensitivity control as shown. Switching between mono and stereo mode The mono/stereo switch allows you to switch between mono and stereo mode, depending on the intercom system. Set the mono/stereo switch to the desired position: – mono –... -
Page 13: Using The Headset
Using the headset Attaching the cable clip The cable clip allows you to attach the headset cable your clothing so that the cable doesn’t hinder or distract you. Guide the headset cable through the cable clip shown. Attach the cable clip to your clothing. -
Page 14: Adjusting The Microphone Boom
Adjusting the microphone boom Bend the 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. » Adjusting the volume CAUTION! Hearing damage due to high volume... -
Page 15: Switching The Talkthrough Function On/Off
To reduce the volume of the TalkThrough function: Press the TT VOLUME – button If you change the volume with the TalkThrough function switched on, the new volume setting is saved and will be used as the default the next time the TalkThrough function is activated. -
Page 16: Switching Noisegard On/Off
When NoiseGard is switched on: – the LED lights up red and – you can listen to music and make telephone calls at the same time. Fail safe operation When the batteries are completely discharged, NoiseGard automatically switches off. -
Page 17: Replacing The Batteries
NoiseGard automatically switches off (fail safe operation). Replace the batteries or the rechargeable batteries as follows: Always replace the two batteries at the same time. Open the battery compartment by pushing the catch and open the cover. -
Page 18: Folding Up The Headset
Rotate the ear cups by 90°. Turn the microphone boom flat as shown. Pull out the right ear cup and then fold it in. Place the headset flat into the soft case as shown. The two AAA size batteries can be inserted into the two straps at the side of the soft case. -
Page 19: Care And Maintenance
Use a soft, slightly damp cloth to clean the headset from time to time. Replacing the ear pads You can replace the ear pads. Spare ear pads are available as accessories. Accessories are available from your Sennheiser partner. A list of suitable accessories can be found on our website at www.sennheiser.com >... -
Page 20: Replacing The Wind Shield
Repeat for the other ear cup. Replacing the wind shield You can replace the wind shield. The HMEC 250 is supplied with a spare wind shield. Carefully pull the wind shield from the microphone. -
Page 21: Specifications
Temperature range −10 to +55°C (operation) Temperature range −55 to +55°C (storage) Power supply for 2 x 1.5 V AAA size battery or NoiseGard 2 x 1.2 V AAA size rechargeable battery Operating time approx. 30 hours Cable length 1.85 m Headphone connector ¼”... - Page 22 100 dB at 1 kHz, 1 V THD at 94 dB SPL < 1 % Noise attenuation 13–34 dB passive attenuation, plus 16–25 dB active noise compensation at low frequencies Contact pressure approx. 8 N Microphone incl. preamplifier Type...
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Page 23: Manufacturer Declarations
In order to protect the environment, only dispose of exhausted batteries. WEEE Declaration Please dispose of this product by taking it to your local collection point or recycling centre for such equipment. Sennheiser and NoiseGard are registered trademarks of... - Page 24 Sennheiser electronic GmbH & Co. KG Am Labor 1, 30900 Wedemark, Germany www.sennheiser.com Printed in China, Publ. 05/10, 516578/A04...