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8

LED indications

Meanings of the LED 

:

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.

Insert the AAA size battery as shown.

Close the battery compartment 

. The battery compart-

ment cover locks into place with an audible click.

Connecting the headset

The headset’s operating control features two cables with 
one jack plug each.

Connect the headset to the corresponding sockets of your 
intercom.

LED

Meaning

red

NoiseGard is switched on

green

TalkThrough is switched on

flashing

Batteries are almost flat

 

Connector

for connection to the

¼” (6.35 mm) jack plug 

headphone output

5.25 mm jack plug 

microphone input

Содержание HMEC 250

Страница 1: ...HMEC 250 Headset for general aviation Instruction manual...

Страница 2: ...sensitivity 11 Switching between mono and stereo mode 11 Using the headset 12 Attaching the cable clip 12 Adjusting the headset 12 Adjusting the microphone boom 13 Adjusting the volume 13 Switching th...

Страница 3: ...fere with your ability to hear critical sounds especially warning alarms and sounds resulting from malfunction The headset is capable of producing sound pressure levels exceeding 85 dB A In many count...

Страница 4: ...ces when not in use Remove batteries when the device is not used for extended periods of time Dispose of exhausted batteries at special collection points or return them to your specialist dealer Do no...

Страница 5: ...headset other than as described in this instruction manual or under operating conditions which differ from those described herein Delivery includes Delivery of the HMEC 250 headset includes 1 HMEC 25...

Страница 6: ...xact 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 Fail safe operation When the batteries are...

Страница 7: ...or space saving storage and transpor tation Noise compensating boom microphone ensures excellent speech transmission Flexible microphone boom Separate left and right channel volume control Excellent c...

Страница 8: ...OFF button NoiseGard TT VOLUME button Talk Through TALK THROUGH button on off LED status display Operating control integrated in the cable Cable with microphone plug 5 25 mm jack plug Cable with head...

Страница 9: ...as shown Close the battery compartment The battery compart ment cover locks into place with an audible click Connecting the headset The headset s operating control features two cables with one jack p...

Страница 10: ...ia the headset s operating control However the functions of the mobile telephone cannot be controlled via the headset s operating control Switch NoiseGard on see Switching NoiseGard on off on page 15...

Страница 11: ...through the headset Operate the connected audio player as usual and observe the manufacturers instructions DANGER Danger of accident due to reduced attention Listening to music or operating an audio p...

Страница 12: ...sensitivity of the microphone Use a suitable slotted screwdriver Turn the microphone sensitivity control as shown Switching between mono and stereo mode The mono stereo switch allows you to switch be...

Страница 13: ...ophone boom is on the left side of the mouth see right left labeling on the headband joints and the headband runs over the top of your head Adjust the length of the headband so that your ears are comp...

Страница 14: ...ntrol integrated into the headset cable To adjust the volume for the left or right channel Slide one of the two volume controls upwards to increase the volume or downwards to reduce the volume CAUTION...

Страница 15: ...h the TalkThrough function on or off When the TalkThrough function is switched on the LED lights up green Adjusting the volume of the TalkThrough function To increase the volume of the TalkThrough fun...

Страница 16: ...approx one second 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 disch...

Страница 17: ...geable batteries as follows Open the battery compartment by pushing the catch and open the cover Remove the battery Insert a new AAA size battery as shown Close the battery compartment The battery com...

Страница 18: ...safe transportation of the headset use the supplied soft case and fold the headset as follows Rotate the ear cups by 90 Turn the microphone boom flat as shown Pull out the right ear cup and then fold...

Страница 19: ...of the headset Liquids entering the housing of the headset can cause a short circuit and damage the electronics Only use a soft slightly damp cloth to clean the headset Do not use any solvents or clea...

Страница 20: ...the ear cup until it clicks audibly into place 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 t...

Страница 21: ...y or 2 x 1 2 V AAA size rechargeable battery Operating time approx 30 hours Cable length 1 85 m Headphone connector 6 35 mm jack plug Microphone connector 5 25 mm jack plug Additional features NoiseGa...

Страница 22: ...sive attenuation plus 16 25 dB active noise compensation at low frequencies Contact pressure approx 8 N Microphone incl preamplifier Type BKE 46 Transducer principle pre polarized condenser microphone...

Страница 23: ...8 EC The declaration is available at www sennheiser com Before putting the device into operation please observe the respective country specific regulations Batteries The supplied batteries can be recy...

Страница 24: ...Sennheiser electronic GmbH Co KG Am Labor 1 30900 Wedemark Germany www sennheiser com Printed in China Publ 05 10 516578 A04...

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