Instructions for Use
Page 2
... ...4 Product variants ...5 Delivery includes ...8 Recommended accessories ...9 Connecting the headsets ...10 Connecting cables for headsets ...10 Connector assignment ...12 Powering options ...13 Preparing the headsets for use ...19 Adjusting the headband ...19 Positioning the microphone ...20 Using the headsets ...22 Turning NoiseGard™ on/off ...22 Mono/Stereo selection (except HMEC 355, HMEC 355-C, HMEC 372 and HMDC 372 22 Adjusting the volume ...22 Attaching the cable clip ...23 Folding up the headphones...
... ...4 Product variants ...5 Delivery includes ...8 Recommended accessories ...9 Connecting the headsets ...10 Connecting cables for headsets ...10 Connector assignment ...12 Powering options ...13 Preparing the headsets for use ...19 Adjusting the headband ...19 Positioning the microphone ...20 Using the headsets ...22 Turning NoiseGard™ on/off ...22 Mono/Stereo selection (except HMEC 355, HMEC 355-C, HMEC 372 and HMDC 372 22 Adjusting the volume ...22 Attaching the cable clip ...23 Folding up the headphones...
Instructions for Use
Page 3
Set the volume to repair the headset yourself. The HMEC 350, HMEC 352, HMEC 355, HMEC 355-C, HMEC 356, HMEC 372, HMEC 450 and HMDC 372 are pilot headsets with NoiseGard™ turned on, you . Before operating any aircraft, make sure that do not interfere with your ability to hear informational sounds and warning alarms. • Do not attempt to safe levels that , with closed ear protector headphones and...
Set the volume to repair the headset yourself. The HMEC 350, HMEC 352, HMEC 355, HMEC 355-C, HMEC 356, HMEC 372, HMEC 450 and HMDC 372 are pilot headsets with NoiseGard™ turned on, you . Before operating any aircraft, make sure that do not interfere with your ability to hear informational sounds and warning alarms. • Do not attempt to safe levels that , with closed ear protector headphones and...
Instructions for Use
Page 4
... due to unilateral connecting cable • Foldable headband for easy and space-saving storage • Clear communications due to MKE 45-1 pre-polarized 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 • Integrated volume control • Adaption to the aircraft...
... due to unilateral connecting cable • Foldable headband for easy and space-saving storage • Clear communications due to MKE 45-1 pre-polarized 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 • Integrated volume control • Adaption to the aircraft...
Instructions for Use
Page 5
... battery pack • Fail safe operation in case of power failure • Supply voltage for the NoiseGard™ system is processed by the in-line electronics in the connecting cable • Made in Germany, 5-year warranty (HMEC 450: 10-year warranty) Product variants HMEC 352 NoiseGard™ headset The HMEC 352 differs from the HMEC 350 in the following features: • Connection of microphone...
... battery pack • Fail safe operation in case of power failure • Supply voltage for the NoiseGard™ system is processed by the in-line electronics in the connecting cable • Made in Germany, 5-year warranty (HMEC 450: 10-year warranty) Product variants HMEC 352 NoiseGard™ headset The HMEC 352 differs from the HMEC 350 in the following features: • Connection of microphone...
Instructions for Use
Page 6
...; headset The HMEC 356 differs from the HMEC 350 in the following features: • Connection of headphones, microphone and NoiseGard™ electronics to the on-board power supply system (12-35 V DC) via 6-pin Redel plug HMEC 372 NoiseGard™ headset The HMEC 372 differs from the HMEC 350 in the following features: • No Mono/Stereo switch • Coiled cable • Connection of headphones and microphone via U-174/U jack plug to...
...; headset The HMEC 356 differs from the HMEC 350 in the following features: • Connection of headphones, microphone and NoiseGard™ electronics to the on-board power supply system (12-35 V DC) via 6-pin Redel plug HMEC 372 NoiseGard™ headset The HMEC 372 differs from the HMEC 350 in the following features: • No Mono/Stereo switch • Coiled cable • Connection of headphones and microphone via U-174/U jack plug to...
Instructions for Use
Page 8
No. 044740) HMEC 352, HMEC 355 and HMEC 356 headsets • Headset • Padded carry and storage bag with shoulder strap for headset and accessories • Wind screen for microphone • MZQ 2002-1 cable clip (Cat. No. 044740) 8 Delivery includes HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets • Headset • 3-pin XLR socket for aircraft panel mounting (power supply via the on-board system) • Padded carry...
No. 044740) HMEC 352, HMEC 355 and HMEC 356 headsets • Headset • Padded carry and storage bag with shoulder strap for headset and accessories • Wind screen for microphone • MZQ 2002-1 cable clip (Cat. No. 044740) 8 Delivery includes HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets • Headset • 3-pin XLR socket for aircraft panel mounting (power supply via the on-board system) • Padded carry...
Instructions for Use
Page 9
Length of reliable operation (batteries are also available with a right-angled jack plug featuring a 7.5 A fuse and a green LED operation indicator: • ACX-11 adapter cable for powering one headset via the cigarette lighter socket • ACX-22 adapter cable for connecting the NoiseGard™ electronics of the HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets. No. 092807) BP-04 battery pack (Cat. Four 1.5 V AA size alkaline manganese batteries (IEC...
Length of reliable operation (batteries are also available with a right-angled jack plug featuring a 7.5 A fuse and a green LED operation indicator: • ACX-11 adapter cable for powering one headset via the cigarette lighter socket • ACX-22 adapter cable for connecting the NoiseGard™ electronics of the HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets. No. 092807) BP-04 battery pack (Cat. Four 1.5 V AA size alkaline manganese batteries (IEC...
Instructions for Use
Page 10
Connecting cable for HMEC 350 and HMEC 450 Connecting cable for HMEC 352 Connecting cable for HMEC 355 Connecting the headsets Connecting cables for headsets HMEC 350 and HMEC 450 headsets: 1 ¼" (6.35 mm) stereo jack plug for connecting the headphones 1 PJ-068 jack plug for connecting the microphone 1 XLR-3 plug for connecting the power supply for the NoiseGard™ electronics HMEC 352 headset: 1 ¼" (6.35 mm) stereo jack plug for connecting the headphones 1 PJ-068 jack plug for connecting the microphone and the power supply for the NoiseGard™ electronics HMEC 355 headset: 1...
Connecting cable for HMEC 350 and HMEC 450 Connecting cable for HMEC 352 Connecting cable for HMEC 355 Connecting the headsets Connecting cables for headsets HMEC 350 and HMEC 450 headsets: 1 ¼" (6.35 mm) stereo jack plug for connecting the headphones 1 PJ-068 jack plug for connecting the microphone 1 XLR-3 plug for connecting the power supply for the NoiseGard™ electronics HMEC 352 headset: 1 ¼" (6.35 mm) stereo jack plug for connecting the headphones 1 PJ-068 jack plug for connecting the microphone and the power supply for the NoiseGard™ electronics HMEC 355 headset: 1...
Instructions for Use
Page 14
... NoiseGard™ electronics can be mounted by a 1 A fuse. The HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets are supplied with operating voltages between 12-35 V DC. XLR-3 socket HMEC 350 and HMEC 450 headsets: ̈ Connect the ¼" (6.35 mm) stereo jack plug for the headphones and the PJ-068 jack plug for the microphone to the XLR-3 socket. 14 Power supply for panel mounting in the aircraft. Danger of...
... NoiseGard™ electronics can be mounted by a 1 A fuse. The HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets are supplied with operating voltages between 12-35 V DC. XLR-3 socket HMEC 350 and HMEC 450 headsets: ̈ Connect the ¼" (6.35 mm) stereo jack plug for the headphones and the PJ-068 jack plug for the microphone to the XLR-3 socket. 14 Power supply for panel mounting in the aircraft. Danger of...
Instructions for Use
Page 16
... the battery compartment. Red LED: The batteries are low. Observe correct polarity when inserting the batteries. ̈ Close the cover of the battery compartment. ̈ Insert four AA size alkaline-manganese batteries (IEC LR 6). Replace the batteries. 16 Connecting the headset to ensure a longer operating time, we would recommend using standard AA size alkaline manganese batteries (IEC LR 6) or NiMH rechargeable batteries. Yellow LED: The battery pack is turned...
... the battery compartment. Red LED: The batteries are low. Observe correct polarity when inserting the batteries. ̈ Close the cover of the battery compartment. ̈ Insert four AA size alkaline-manganese batteries (IEC LR 6). Replace the batteries. 16 Connecting the headset to ensure a longer operating time, we would recommend using standard AA size alkaline manganese batteries (IEC LR 6) or NiMH rechargeable batteries. Yellow LED: The battery pack is turned...
Instructions for Use
Page 17
.... Connecting the headset, turning on the battery pack ̈ Connect the XLR-3 plug of the headset connecting cable to the XLR-3 socket on the battery pack by means of the supplied attachment clip, Velcro tape is out of operation. Note: When using the battery pack, the ON/OFF switch integrated into the headset connecting cable is also supplied. 17 The yello LED power indicator lights up. HMEC 355-C headset: Connect the XLR-5 plug for the microphone...
.... Connecting the headset, turning on the battery pack ̈ Connect the XLR-3 plug of the headset connecting cable to the XLR-3 socket on the battery pack by means of the supplied attachment clip, Velcro tape is out of operation. Note: When using the battery pack, the ON/OFF switch integrated into the headset connecting cable is also supplied. 17 The yello LED power indicator lights up. HMEC 355-C headset: Connect the XLR-5 plug for the microphone...
Instructions for Use
Page 18
... connecting the NoiseGard™ electronics of the HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets to the on-board power supply via the cigarette lighter socket: • ACX-1 adapter cable for powering one headset via the cigarette lighter socket • ACX-2 adapter cable for powering two headsets via the cigarette lighter socket The adapter cables are also available with a right-angled jack plug featuring a 7.5 A fuse and a green LED operation...
... connecting the NoiseGard™ electronics of the HMEC 350, HMEC 355-C, HMEC 372, HMEC 450 and HMDC 372 headsets to the on-board power supply via the cigarette lighter socket: • ACX-1 adapter cable for powering one headset via the cigarette lighter socket • ACX-2 adapter cable for powering two headsets via the cigarette lighter socket The adapter cables are also available with a right-angled jack plug featuring a 7.5 A fuse and a green LED operation...
Instructions for Use
Page 19
Squeezing can damage the connecting cables. ̈ Turn on page 22). ̈ Final adjustment is ensured. Preparing the headsets for use Adjusting the headband For good noise attenuation and best possible comfort, the headband has to be adjusted to "ON" (see "Turning NoiseGard™ on/off" on the NoiseGard™ active noise compensation by setting the ON/OFF switch to properly fit...
Squeezing can damage the connecting cables. ̈ Turn on page 22). ̈ Final adjustment is ensured. Preparing the headsets for use Adjusting the headband For good noise attenuation and best possible comfort, the headband has to be adjusted to "ON" (see "Turning NoiseGard™ on/off" on the NoiseGard™ active noise compensation by setting the ON/OFF switch to properly fit...
Instructions for Use
Page 22
... 'll receive a mono sound source so that the Mono/Stereo switch can remain set to loud sounds can cause hearing damage! Mono/Stereo selection (except HMEC 355, HMEC 355-C, HMEC 372 and HMDC 372) In general, you can be used as warning alarms. 22 Adjusting the volume Exposure to "Mono". When using the BP-04 battery pack, set the Mono/Stereo switch to a medium value. Set the volume control to "Stereo". Turn on the...
... 'll receive a mono sound source so that the Mono/Stereo switch can remain set to loud sounds can cause hearing damage! Mono/Stereo selection (except HMEC 355, HMEC 355-C, HMEC 372 and HMDC 372) In general, you can be used as warning alarms. 22 Adjusting the volume Exposure to "Mono". When using the BP-04 battery pack, set the Mono/Stereo switch to a medium value. Set the volume control to "Stereo". Turn on the...
Instructions for Use
Page 25
...HMEC 450 headset Replace the headband padding if it is damaged. ̈ Open the snaps on the headband padding and remove the worn headband padding. ̈ Put the new headband padding around the headband. ̈ Pull the two edges of the headband padding together and close the snaps. 25 Replacing the headband padding Replace... the headband padding if it is damaged. ̈ Pull the Ziploc type fastening strips of the headband padding apart and remove the worn headband padding. ̈ Put the new headband padding around the ...
...HMEC 450 headset Replace the headband padding if it is damaged. ̈ Open the snaps on the headband padding and remove the worn headband padding. ̈ Put the new headband padding around the headband. ̈ Pull the two edges of the headband padding together and close the snaps. 25 Replacing the headband padding Replace... the headband padding if it is damaged. ̈ Pull the Ziploc type fastening strips of the headband padding apart and remove the worn headband padding. ̈ Put the new headband padding around the ...
Instructions for Use
Page 28
... aircraft powered: The aircraft fuse is lit, replace the batteries. 28 In case of the power source. ̈ Check to see if the XLR-3 plug is correctly connected to see if the ON/OFF switch is set to "ON". The XLR-3 plug has been pulled out of difficulty If problems occur that are not listed in the below table, please contact your Sennheiser...
... aircraft powered: The aircraft fuse is lit, replace the batteries. 28 In case of the power source. ̈ Check to see if the XLR-3 plug is correctly connected to see if the ON/OFF switch is set to "ON". The XLR-3 plug has been pulled out of difficulty If problems occur that are not listed in the below table, please contact your Sennheiser...
Instructions for Use
Page 29
... receiving a mono source but the headset is set to stereo operation. ̈ Set the Mono/Stereo switch to see if the headphone jack plug is correctly connected. Problem Active noise compensation but very low volume communication Active noise compensation but reduced intelligibility Communications in one ear only (only HMEC 350, HMEC 352, HMEC 356 and HMEC 356) Possible cause and what to "Stereo". The microphone connection has been pulled out (except HMEC...
... receiving a mono source but the headset is set to stereo operation. ̈ Set the Mono/Stereo switch to see if the headphone jack plug is correctly connected. Problem Active noise compensation but very low volume communication Active noise compensation but reduced intelligibility Communications in one ear only (only HMEC 350, HMEC 352, HMEC 356 and HMEC 356) Possible cause and what to "Stereo". The microphone connection has been pulled out (except HMEC...
Instructions for Use
Page 31
... data Connecting cable Weight without cable Power supply for NoiseGard™ Current consumption Fuse Connectors Controls Temperature range Operating time of battery pack (except HMEC 352 and HMEC 356) HMEC 350 Ȋ HMEC 352 Ȋ HMEC 356 Ȋ HMEC 450 1.5 m, unilateral 370 g 12-35 V DC 27 mA (zero signal current), max. 80 mA 500 mA thermo fuse 6.35 mm stereo jack plug for headphones, PJ-068 jack plug for microphone, XLR-3 for NoiseGard™ Ȋ 6.35 mm stereo jack plug Ȋ 6-pin...
... data Connecting cable Weight without cable Power supply for NoiseGard™ Current consumption Fuse Connectors Controls Temperature range Operating time of battery pack (except HMEC 352 and HMEC 356) HMEC 350 Ȋ HMEC 352 Ȋ HMEC 356 Ȋ HMEC 450 1.5 m, unilateral 370 g 12-35 V DC 27 mA (zero signal current), max. 80 mA 500 mA thermo fuse 6.35 mm stereo jack plug for headphones, PJ-068 jack plug for microphone, XLR-3 for NoiseGard™ Ȋ 6.35 mm stereo jack plug Ȋ 6-pin...
Instructions for Use
Page 33
... data Connecting cable Weight without cable Power supply for NoiseGard™ Current consumption Fuse Connectors Controls Temperature range Operating time of battery pack (except HMEC 355) HMEC 355 Ȋ HMEC 355-C Ȋ HMEC 372 Ȋ HMDC 372 1.5 m, unilateral Ȋ coiled cable, unilateral 370 g 12-35 V DC 27 mA (zero signal current), max. 80 mA 500 mA thermo fuse XLR-5 for headphones, microphone and NoiseGard™ Ȋ XLR-5 for headphones Ȋ and microphone...
... data Connecting cable Weight without cable Power supply for NoiseGard™ Current consumption Fuse Connectors Controls Temperature range Operating time of battery pack (except HMEC 355) HMEC 355 Ȋ HMEC 355-C Ȋ HMEC 372 Ȋ HMDC 372 1.5 m, unilateral Ȋ coiled cable, unilateral 370 g 12-35 V DC 27 mA (zero signal current), max. 80 mA 500 mA thermo fuse XLR-5 for headphones, microphone and NoiseGard™ Ȋ XLR-5 for headphones Ȋ and microphone...
Instructions for Use
Page 34
... date of this reason, we recommend that are accessory items, rechargeable or disposable batteries that the sales receipt be retained as proof of Conformity Sennheiser electronic GmbH & Co. Excluded are carried out. Depending on the individual frequency of either individual parts or the entire device. operating faults, mechanical damages, incorrect operating voltage), wear and tear, force majeure and...
... date of this reason, we recommend that are accessory items, rechargeable or disposable batteries that the sales receipt be retained as proof of Conformity Sennheiser electronic GmbH & Co. Excluded are carried out. Depending on the individual frequency of either individual parts or the entire device. operating faults, mechanical damages, incorrect operating voltage), wear and tear, force majeure and...