Sennheiser Corded Headset HME 110 User Guide

HME 110  
Headset  
Instruction manual  
 
Important safety information  
attention. During flight operation, do not use the headset  
for making phone calls or listening to music.  
̈ The product is capable of producing sound pressure  
exceeding 85 dB(A). In many countries 85 dB(A) is the  
maximum legally permissible level for continuous noise  
exposure during the working day. Do not listen at high  
volume levels for long periods of time to prevent hearing  
damage.  
Preventing damage to the product and dysfunctions  
̈ Always keep the product dry and do not expose it to  
extreme temperatures (hairdryer, heater, extended  
exposure to sunlight, etc.) to avoid corrosion or  
deformation.  
̈ Only clean the product with a soft, dry cloth.  
̈ Never repair or attempt to repair a defective product  
yourself. Contact your Sennheiser partner or the  
Sennheiser Service Department.  
̈ Only replace parts of the product whose replacement is  
described in this instruction manual. All other parts of the  
product must be replaced by your Sennheiser partner.  
2 | HME 110  
 
Important safety information  
Intended use of the headset  
Intended use of the product includes  
• having read and understood this instruction manual,  
especially the chapter “Important safety information” on  
page 1,  
• using the headset in helicopters, propeller and turboprop  
aircraft and within the operating conditions as described  
in this instruction manual.  
“Improper use” means using the product other than as  
described in this instruction manual, or under operating  
conditions which differ from those described herein.  
HME 110 | 3  
 
HME 110 headset  
HME 110 headset  
The HME 110 pilot headset is characterized by the following  
features:  
• Passive headset with excellent noise attenuation  
• Excellent comfort due to very low weight, soft ear pads  
and padded headband  
• Foldable headband for easy and space-saving transport  
• Clear communications due to BKE 45-1 condenser  
microphone with adjustable sensitivity  
• Microphone can be easily positioned and worn on either  
left or right side due to flexible microphone boom with  
quick-fixing device  
• Best possible freedom of movement due to unilateral  
connection cable  
• Optimum radio reception due to headphone system with a  
wide frequency response  
• Integrated volume control  
• Adaption to the aircraft audio system via mono/stereo  
switch  
• Made in Germany, 10-year warranty  
4 | HME 110  
 
Delivery includes  
Delivery includes  
1 HME 110 headset  
1 wind screen for microphone  
1 cable clip  
1 instruction manual  
HME 110 | 5  
 
Putting the HME 110 in operation  
Putting the HME 110 in  
operation  
Connecting the headset  
̈ Connect the two jack plugs of the  
headset to the corresponding jack  
1
sockets of your audio system.  
2
Jack plug  
Jack socket of the audio system  
5.25 mm jack plug 1  
Microphone input  
(PJ-068 equivalent)  
¼” (6.35 mm) jack plug 2 Headphone output  
Adjusting the headband  
For good noise attenuation and best possible comfort, the  
headset has to be adjusted to properly fit your head. To do  
so, you can adjust the headband.  
CAUTION!  
Damage to the product due to squeezing of cables!  
When adjusting the headband, the connection cable for the  
headphones can be squeezed and damaged.  
̈ Make sure not to squeeze the headphones connection  
cable when adjusting the headband.  
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Putting the HME 110 in operation  
̈ Wear the headset so that the headband runs over the top  
of your head.  
̈ Adjust the length of the headband so that  
– your ears are completely inside the ear pads,  
– you feel even, gentle pressure around your ears,  
– a snug fit of the headband on the head is ensured.  
̈ Final adjustment is best made in a noisy environment.  
HME 110 | 7  
 
Putting the HME 110 in operation  
Positioning the microphone  
To position the microphone boom on either the right or left-  
hand side of the mouth:  
̈ Loosen the quick-fixing device.  
̈ Rotate the microphone boom by 180°.  
̈ Tighten the quick-fixing device.  
Positioning the microphone towards the corner of the  
mouth  
̈ Bend the flexible microphone boom so that the micro-  
phone is placed at the corner of the mouth. Maintain a  
distance of approx. 2 cm between microphone and mouth.  
8 | HME 110  
 
Using the HME 110  
Using the HME 110  
Switching between mono and stereo  
operation  
In general, you’ll receive a mono sound source so that the  
mono/stereo switch can remain set to “MONO” (factory  
setting).  
To set the headset to stereo operation:  
̈ Remove the ear pad (see “Replacing the ear pads” on  
page 14) from the ear cup with the microphone boom  
attached.  
̈ Set the mono/stereo switch to “STEREO”.  
HME 110 | 9  
 
 
Using the HME 110  
Adjusting the volume  
WARNING!  
Hearing damage due to high volume levels!  
Listening at high volume levels for long periods  
can lead to permanent hearing defects.  
̈ Before putting the headset on, set the  
volume to a low level.  
̈ Do not continuously expose yourself to high  
volumes.  
̈ Adjust the volume to a medium level. Make sure that you  
can hear critical sounds such as warning alarms.  
+
10 | HME 110  
 
 
Using the HME 110  
Adjusting the microphone gain “Mic Gain”  
According to JTSO approval C58a, the microphone output  
voltage is factory preset to 400 mV. If the microphone output  
voltage is too high or too low for your audio system, it can be  
readjusted on the microphone.  
̈ Use a small slotted screwdriver and turn the “Mic Gain  
Adjustment” screw (see diagram) until you have reached  
the desired setting.  
+
Mic Gain Adjustment  
BKE 45–1  
P/N 045–305–097  
TSO - C58a  
MADE IN GERMANY  
HME 110 | 11  
 
 
Using the HME 110  
Transporting the headset  
For space-saving transportation, you can fold the headset:  
̈ Tuck the ear cups between the headband.  
To unfold the headset:  
̈ Grasp both ear cups and pull them up and away from the  
headband.  
12 | HME 110  
 
Cleaning and maintaining the HME 110  
Cleaning and maintaining the  
HME 110  
Cleaning the headset  
CAUTION!  
Liquids can damage the electronics of the product!  
Liquids entering the housing of the product can cause a  
short-circuit and damage the electronics.  
̈ Keep all liquids far away from the product.  
̈ Do not use any solvents or cleansing agents.  
̈ Use a soft, dry cloth to clean the product from time to  
time.  
Replacing the wind screen  
If the wind screen for the microphone shows signs of wear  
such as tears or holes, replace the wind screen. The new wind  
screen must totally enclose the microphone.  
HME 110 | 13  
 
Cleaning and maintaining the HME 110  
Replacing the ear pads  
If the ear pads are damaged or worn out, replace them as  
follows:  
̈ Grasp the edge of the old ear pads and peel them up and  
away from the ear cups.  
̈ Press the new ear pads onto the ear cups.  
14 | HME 110  
 
 
Accessories and spare parts  
Accessories and spare parts  
The following accessories and spare parts are available from  
your Sennheiser partner. To find a Sennheiser partner in your  
• Wind screen for BKE 45-1 condenser microphone  
• HZC 08 cable clip  
• Carry and storage bag  
• GOP gel ear pads  
• LUXURY ear pads  
HME 110 | 15  
 
If a problem occurs ...  
If a problem occurs ...  
Problem  
Possible cause  
Solution  
You are using a stereo Set the mono/stereo  
Communication  
audio system but the  
switch to “STEREO”  
s in one ear only  
headset is set to mono (see page 9).  
operation.  
You are receiving a  
mono source but the  
Set the mono/stereo  
switch to “MONO”  
headset is set to stereo (see page 9).  
operation.  
Very low  
volume  
The volume is set too  
low.  
Adjust the volume  
setting of your  
communication  
headset  
(see page 10).  
The headphone  
connection has been  
pulled out.  
Check to see if the  
headphone jack plug  
is correctly connected.  
Reduced  
intelligibility  
The microphone  
connection has been  
pulled out.  
Check to see if the  
microphone jack plug  
is correctly connected.  
Microphone  
The microphone gain  
Adjust the  
output voltage “Mic Gain” needs to be microphone gain   
too high or too readjusted.  
low  
“Mic Gain” until you  
have reached the  
desired setting   
(see page 11).  
16 | HME 110  
 
If a problem occurs ...  
If a problem occurs that is not listed in the above table or if  
the problem cannot be solved with the proposed solutions,  
please contact your local Sennheiser partner for assistance.  
To find a Sennheiser partner in your country, search at  
HME 110 | 17  
 
Specifications  
Specifications  
Headset  
Transducer principle  
Ear coupling  
dynamic, closed  
circum-aural  
Frequency response  
Nominal impedance  
45 – 15,000 Hz  
mono: 150   
stereo: 300   
Noise attenuation  
Contact pressure  
> 10 to 40 dB  
approx. 10 N  
Microphone incl. preamplifier  
Transducer principle  
BKE 45-1 condenser mic capsule,   
noise-compensating  
300 – 5,000 Hz  
120 dB  
Frequency response  
Max. SPL  
Terminating  
impedance  
150   
Output voltage  
400 mV ± 3dB at 114 dB  
(as per RTCA/DO 214)  
Supply voltage  
typ. 16 V (8 to 16 V  
DC  
DC  
approx. 8 to 25 mA as per RTCA/DO 214)  
18 | HME 110  
 
Specifications  
General data  
Connection cable  
approx. 1,5 m,  
unilateral  
Weight without cable approx. 350 g  
Connectors  
¼” (6.35 mm) jack plug for headphones,  
5.25 mm jack plug (PJ-068 equivalent)  
for microphone  
Controls  
mono/stereo switch  
headphone volume control  
Temperature range  
operation: 15°C to 55°C  
storage: 55°C to 55°C  
Connector assignment  
5.25 mm jack plug (PJ-068 equivalent)  
1 Not assigned  
2 Microphone High  
3 Microphone Low  
1 2  
3
¼” (6.35 mm) jack plug  
1 Audio High left  
2 Audio High right  
3 Audio Low  
1 2  
3
HME 110 | 19  
 
Manufacturer Declarations  
Manufacturer Declarations  
Warranty  
Sennheiser electronic GmbH & Co. KG gives a warranty of 10  
years on this product.  
For the current warranty conditions, please visit our web site  
contact your Sennheiser partner.  
In compliance with the following requirements  
• RoHS Directive (2002/95/EC)  
• WEEE Directive (2002/96/EC)  
CE Declaration of Conformity  
• EMC Directive (2004/108/EC)  
WEEE Declaration  
Please dispose of this product by taking it to your local  
collection point or recycling centre for such equipment.  
This will help to protect the environment in which we  
all live.  
20 | HME 110  
 
Name plates  
 
Sennheiser electronic GmbH & Co. KG  
Am Labor 1, 30900 Wedemark, Germany  
Publ. 01/12, 547018/A01  
 

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