Amron AMCOM III 2830A Series User manual

User Manual
For
Amron International, Inc.
Models 2830A-XX
Portable Three Diver Communicators
S/N ____________________
1380 Aspen Way, Vista California 92081-8349
United States of America
Phone: [phone]
Fax [phone]
Email: [e-mail]
Web: www.amronintl.com
This manual and the information contained herein are provided for use as an operation and maintenance
guide. No license or rights to manufacture, reproduce, or sell either the manual or articles described
herein are given. Amron International, Inc. reserves the right to change specifications without notice.
Copyright© 2020 Amron International, Inc.

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TABLE OF CONTENTS
1INTRODUCTION AND SPECIFICATIONS ..........................................................................................1
1.1 INTRODUCTION...........................................................................................................................1
1.2 SPECIFICATIONS ........................................................................................................................1
1.3 BATTERY LIFE.............................................................................................................................2
1.4 MATERIALS, WEIGHTS & DIMENSIONS....................................................................................2
2OPTIONS AND ACCESSORIES..........................................................................................................3
2.1 OPTIONS......................................................................................................................................4
2.2 ACCESSORIES ............................................................................................................................5
3CONTROLS AND CONNECTIONS......................................................................................................7
3.1 TENDER CONTROLS & CONNECTIONS ...................................................................................7
3.2 DIVER CONTROLS & CONNECTIONS.....................................................................................10
3.3 HELIUM SPEECH UNSCRAMBLER (DSP3) CONTROLS........................................................12
3.4 INHALATION NOISE REDUCTION CONTROLS.......................................................................13
3.5 WIRELESS TENDER (28B) CONTROLS...................................................................................14
3.6 DRAWING, 2-WIRE CONNECTIONS.........................................................................................15
3.7DRAWING, FULL DUPLEX (4-WIRE) CONNECTIONS.............................................................16
3.8 DRAWING, OPERATOR CONNECTIONS, HAND HELD MICROPHONE................................17
3.9 DRAWING, OPERATOR CONNECTIONS, HEADSET..............................................................18
4OPERATION.......................................................................................................................................19
4.1 BATTERY CHARGING ...............................................................................................................19
4.2 BATTERY CONDITION ..............................................................................................................20
4.3 BATTERY INSTALLATION.........................................................................................................20
4.4 MODES OF OPERATION...........................................................................................................20
4.5 VOLUME CONTROLS (2-WIRE)................................................................................................22
4.6 VOLUME CONTROLS FULL DUPLEX (4-WIRE).......................................................................23
4.7 HELIUM SPEECH UNSCRAMBLER (DSP3) OPERATION.......................................................23
4.8 INHALATION NOISE REDUCTION (INR) OPERATION............................................................24
4.9 ACTIVE NOISE REDUCTION (ANR) OPERATION...................................................................25
4.10 WIRELESS TENDER (28B) OPERATION..................................................................................26
4.11 CLEARING THE BASE-STATION PROGRAMMING.................................................................26
4.12 BASE-STATION PROGRAMMING INSTRUCTIONS.................................................................27
5MAINTENANCE AND TROUBLESHOOTING...................................................................................28
5.1 FULL DUPLEX (4-WIRE) SYSTEM CHECK ..............................................................................28
5.2 2-WIRE SYSTEM CHECK ..........................................................................................................28
5.3 GENERAL MAINTENANCE........................................................................................................29
5.4 RECOMMENDED MAINTENANCE SCHEDULE.......................................................................29
5.5 TROUBLESHOOTING................................................................................................................31

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6DRAWINGS ........................................................................................................................................34
6.1 PARTS IDENTIFIER, MODEL 2830A-08, WEATHER RESISTANT AC POWER MODULE &
INHALATION NOISE REDUCTION (INR) OPTION...................................................................35
6.2 PARTS IDENTIFIER, MODEL 2830A-09, WEATHER RESISTANT AC POWER MODULE, MS
CONNECTORS & INHALATION NOISE REDUCTION (INR) OPTION.....................................36
6.3 PARTS IDENTIFIER, MODEL 2830A-10, WEATHER RESISTANT AC POWER MODULE,
INHALATION NOISE REDUCTION (INR) & 28B WIRELESS TENDER OPTION ....................37
6.4 PARTS IDENTIFIER, MODEL 2830A-11, WEATHER RESISTANT AC POWER MODULE.....38
6.5 PARTS IDENTIFIER, MODEL 2830A-12, WEATHER RESISTANT AC POWER MODULE &
DSP3 HELIUM SPEECH UNSCRAMBLER ...............................................................................39
6.6 PARTS IDENTIFIER, 2830A-13, WEATHER RESISTANT AC POWER MODULE & 28B
WIRELESS .................................................................................................................................40
6.7 PARTS IDENTIFIER, MODEL 2830A-15, WEATHER RESISTANT AC POWER MODULE & MS
CONNECTORS ..........................................................................................................................41
6.8 PARTS IDENTIFIER, 2830A-16, WEATHER RESISTANT AC POWER MODULE, MS CONN &
28B WIRELESS TENDER..........................................................................................................42
6.9 PARTS IDENTIFIER, MODEL 2830A-17, WEATHER RESISTANT AC POWER MODULE, MS
CONNECTORS & DSP3 HELIUM UNSCRAMBLER.................................................................43
7PARTS LISTS.....................................................................................................................................44
7.1 PARTS LIST FOR 2830A-XX SERIES FRONT PANEL ASSEMBLIES.....................................44
7.2 PARTS LIST, MODEL 2830A-08, WEATHER RESISTANT AC POWER MODULE &
INHALATION NOISE REDUCTION (INR) OPTION...................................................................45
7.3 PARTS LIST, MODEL 2830A-09, WEATHER RESISTANT AC POWER MODULE, MS
CONNECTORS & INHALATION NOISE REDUCTION (INR) OPTION.....................................45
7.4 PARTS LIST, MODEL 2830A-10, WEATHER RESISTANT AC POWER MODULE,
INHALATION NOISE REDUCTION (INR) & 28B WIRELES TENDER OPTION.......................46
7.5 PARTS LIST, MODEL 2830A-11, WEATHER RESISTANT AC POWER MODULE .................46
7.6 PARTS LIST, MODEL 2830A-12, WEATHER RESISTANT AC POWER MODULE & DSP3
HELIUM UNSCRAMBLER OPTION...........................................................................................46
7.7 PARTS LIST, MODEL 2830A-13, WEATHER RESISTANT AC POWER MODULE & 28B
WIRELESS TENDER OPTION...................................................................................................47
7.8 PARTS LIST, MODEL 2830A-15, WEATHER RESISTANT AC POWER MODULE & MS
CONNECTORS ..........................................................................................................................47
7.9 PARTS LIST, MODEL 2830A-16, WEATHER RESISTANT AC POWER MODULE, MS
CONNECTORS & 28B WIRELESS TENDER OPTION.............................................................47
7.10 PARTS LIST, MODEL 2830A-17, WEATHER RESISTANT AC POWER MODULE, MS
CONNECTORS & DSP3 HELIUM UNSCRAMBLER OPTION..................................................48
7.11 PARTS LIST, 2820-302 CASE ASSEMBLY WITH POWER ENTRY MODULE ........................48
7.12 PARTS LIST, 28XXA-FS-02 FIELD SPARES KIT FOR 2820A, 2825A & 2830A SERIES........48
8LIMITED WARRANTY AND SERVICE POLICY................................................................................50

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1 INTRODUCTION AND SPECIFICATIONS
1.1 INTRODUCTION
Congratulations on purchasing the most advanced and powerful portable communicator in
the diving industry! Our engineering team has integrated the latest in digital advancements to
produce the industry’s most intelligible and reliable diver communicators. Our built in quality
that Amron is known for makes the 2830A series the most versatile and durable
communicators anywhere in the world!
The AMCOM III Series is a family of full-featured hard-wired, three-diver communicators with
independent microphone and earphone volume controls for the tender and each diver. All
models come standard with a built-in internal charger and can be operated from 90-264 VAC,
an internal 12 VDC battery, or an external 12 VDC power source.
All communicators are supplied with an outdoor weather resistant AC power entry module
located on the case, and country specific locking AC power cord of your choice.
There are many options available to fit your application such as Inhalation Noise Reduction
(INR), DSP3 Helium Speech Unscrambler, and 28B Wireless Tender.
The 2830A series has the ability to operate in the 2-Wire and Full Duplex (4-Wire) mode, as
well as both modes being used simultaneously. Full Duplex (4-Wire) mode is required when
using the Inhalation Noise Reduction or Wireless Tender features.
Only Amron offers Microphone Auto Detection that identifies the type of microphone each
diver is using and automatically adjusts for optimum performance. This portable diving
communicator has the ability to work with both dynamic and pre-amplified microphones in
either 2-Wire or 4-Wire modes.
1.2 SPECIFICATIONS
Input Impedance (Each Input) ................................................................................... 250 Ohms
Frequency Response ........................................................................................ 300 - 10000 Hz
Common Mode Rejection ..................................................................................40 dB Minimum
Current Drain Maximum Full Volume .............................................................................3 Amps
Minimum Quiescent ................................................................................................ 0.190 Amps
Output Impedance ........................................................................................................... 4 Ohm
Power Supply Voltage ..............................................12 VDC Nominal (9 VDC Min - 16 VDC Max)
AC Power Operating Range .................................................................... 90-264 VAC, 50-60 Hz
Sensitivity (Input) .............................................................................................................0.5 mV
Output Power (RMS @ 4 Ohm Load, 12 VDC) ..................................................10 Watts Audio

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1.3 BATTERY LIFE
Model 2830A-08 ........................................................................................................... 32 Hours
Model 2830A-09 ........................................................................................................... 32 Hours
Model 2830A-10 ........................................................................................................... 22 Hours
Model 2830A-11 ........................................................................................................... 41 Hours
Model 2830A-12 .......................................................................................................... 29 Hours
Model 2830A-13 .......................................................................................................... 30 Hours
Model 2830A-15 ........................................................................................................... 41 Hours
Model 2830A-16 ........................................................................................................... 30 Hours
Model 2830A-17 ........................................................................................................... 29 Hours
1.4 MATERIALS, WEIGHTS & DIMENSIONS
Front Panel...............................................................................Stainless Steel, Powder Coated
Enclosure................................................................................High Impact UV Resistant Plastic
Enclosure Color.................................................................................Bright International Yellow
Length ..........................................................................................................14.5 In. (36.8 Cm)
Width ............................................................................................................9.0 In. (22.9 Cm)
Height ..........................................................................................................10.0 In. (25.4 Cm)
Model 2830A-08 with Inhalation Noise Reduction (INR) Option................ 17.20 Lbs. (7.80 Kg)
Model 2830A-09 with MS Connectors & INR Option.................................. 17.25 Lbs. (7.82 Kg)
Model 2830A-10 with INR & 28B Wireless Tender Option......................... 17.75 Lbs. (8.05 Kg)
Model 2830A-11 with Binding Posts........................................................... 17.05 Lbs. (7.73 Kg)
Model 2830A-12 with DSP3 Helium Speech Unscrambler Option............. 17.45 Lbs. (7.92 Kg)
Model 2830A-13 with 28B Wireless Tender Kit.......................................... 17.35 Lbs. (7.87 Kg)
Model 2830A-15 with MS Connectors........................................................ 17.10 Lbs. (7.76 Kg)
Model 2830A-16 with MS Connectors & 28B Wireless Tender Option...... 17.40 Lbs. (7.89 Kg)
Model 2830A-17 with MS Connectors & DSP3 HSU Option...................... 17.50 Lbs. (7.94 Kg)

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2 OPTIONS AND ACCESSORIES
The following configurations are available to customize your AMCOM III communicator. Options have
to be ordered at the time of purchase or the communicator has to be returned to AMRON for the
option to be installed.
Model 2830A-08 with Inhalation Noise Reduction Option
Available Models & Options:
2830A-08 with Inhalation Noise Reduction Option (Shown Above)
2830A-09 with MS Connectors & Inhalation Noise Reduction Option
2830A-10 with Inhalation Noise Reduction & 28B Wireless Tender Option
2830A-11 with Binding Posts
2830A-12 with DSP3 Helium Speech Unscrambler Option
2830A-13 with 28B Wireless Tender Option
2830A-15 with MS Connectors
2830A-16 with MS Connectors & 28B Wireless Tender Option
2830A-17 with MS Connectors & DSP3 Helium Speech Unscrambler Option

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2.1 OPTIONS
-08 INHALATION NOISE REDUCTION (INR)
The communicator has all the features of the -11 plus Amron’s Inhalation Noise
reduction allowing the user to reduce or completely remove each individual diver’s
inhalation noise for improved communications. This option requires the divers to be
wired in Full Duplex (4-Wire) mode.
-09 MS CONNECTORS & INHALATION NOISE REDUCTION (INR)
The communicator has all the features of the -15 plus Amron’s Inhalation Noise
reduction allowing the user to reduce or completely remove each individual diver’s
inhalation noise for improved communications. This option requires the divers to be
wired in Full Duplex (4-Wire) mode.
-10 INHALATION NOISE REDUCTION (INR) & 28B WIRELESS TENDER
The communicator has all the features of the -11 plus Amron’s Inhalation Noise
Reduction & 28B Wireless Tender option. This option requires the divers to be
wired in Full Duplex (4-Wire) mode.
The INR feature allows the user to reduce or completely remove each individual
diver’s inhalation noise for improved communications.
The 28B wireless tender option allows hands free operation for the tender and up
to five (5) additional remote users with a range of up to 400 feet away from the
communicator while in constant contact with all divers. Package includes
communicator, wireless base station, remote dual ear muff headset with battery, 8-
port multi-battery charger, and one extra back-up rechargeable battery for remote
headset.
-11 AC POWER WITH INTERNAL CHARGER
Commercial style three diver communicator with binding posts comes standard
with AC power module, country specific locking power cord, and hand held
microphone.
-12 HELIUM SPEECH UNSCRAMBLER (HSU)
The communicator has all the features of the -11 plus Amron’s DSP3 Helium
Speech Unscrambler (HSU) using the state-of-the-art Digital Signal Processor
(DSP) technology to correct raw helium speech into clear, intelligible voice. This
option includes a complex noise reduction filter to improve communications in
situations with high background noise levels.
-13 WIRELESS TENDER OPTION (28B)
The communicator has all the features of the -11 plus the 28B wireless tender
option that allows hands free operation for the tender and up to five (5) additional
remote users with a range of up to 400 feet away from the communicator while in
constant contact with all divers. Package includes communicator, wireless base
station, remote dual ear muff headset with battery, 8-port multi-battery charger, and
one extra back-up rechargeable battery for remote headset. This option requires
the divers to be wired in Full Duplex (4-Wire) mode.
-15 MS CONNECTORS FOR MILITARY USE

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The communicator is equipped with 5-Pin MS style umbilical connectors for use
with military umbilical lines.
-16 MS CONNECTORS & WIRELESS TENDER OPTION (28B)
The communicator is equipped with 5-Pin MS style umbilical connectors for use
with military umbilical lines plus the 28B wireless tender option that allows hands
free operation for the tender and up to five (5) additional remote users with a range
of up to 400 feet away from the communicator while in constant contact with all
divers. Package includes communicator, wireless base station, remote dual ear
muff headset with battery, 8-port multi-battery charger, and one extra back-up
rechargeable battery for remote headset. This option requires the divers to be
wired in Full Duplex (4-Wire) mode.
-17 MS CONNECTORS & HELIUM SPEECH UNSCRAMBLER (HSU)
The communicator has all the features of the -15 plus Amron’s DSP3 Helium
Speech Unscrambler (HSU) using the state-of-the-art Digital Signal Processor
(DSP) technology to correct raw helium speech into clear, intelligible voice. This
option includes a complex noise reduction filter to improve communications in
situations with high background noise levels.
2.2 ACCESSORIES
The following accessories are available for the AMCOM III communicator. Accessories can
be ordered at any time.
2.2.1 Item No. 2401-28 AMRON HEAVY-DUTY HEADSET (Dual Ear Muffs)
The Model 2401-28 is a high quality heavy-duty Telex headset with dual ear muffs
and boom microphone. It has superior sound quality and comes equipped with
color-coded dual banana plugs, 6-foot (1.8-meter) cord, and mates directly to
communicator.
2.2.2 Item No. 2401SM-28 AMRON HEAVY-DUTY HEADSET (Single Ear Muff)
The Model 2401SM-28 is a high quality heavy-duty Telex headset with a single ear
muff and boom microphone. It has superior sound quality and comes equipped with
color-coded dual banana plugs, 6-foot (1.8-meter) cord, and mates directly to
communicator.
2.2.3 Item No. 2460-28 AMRON STANDARD HEADSET (Dual Ear Muffs)
The Model 2460-28 is a light and comfortable headset with dual ear muffs and
designed for extended wear at an economical price. It comes equipped with color-
coded, dual banana plugs that mate directly to AMCOM diver communicators. The
spiral cord can extend up to 8 feet (2.4 meters).
2.2.4 Item No. 2460SM-28 AMRON STANDARD HEADSET (Single Ear Muff)
The Model 2460-28 is a light and comfortable headset with a single ear muff and
designed for extended wear at an economical price. It comes equipped with color-

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coded, dual banana plugs that mate directly to AMCOM diver communicators. The
spiral cord can extend up to 8 feet (2.4 meters).
2.2.5 Item No. 2490-28 NOISE REDUCTION HEADSET (Dual Ear Muffs)
The Model 2490-28 Active Noise Reduction (ANR) headset isolates and reduces
topside noise in loud environments dramatically, allowing the tender and divers to
communicate more clearly and comfortably with increased intelligibility.
Amron’s Active Noise Reduction Headset features two key technologies,
unmatched active noise reduction and unique dynamic noise cancelling
microphone. The proprietary electronic circuitry design shapes and equalizes
incoming audio signals to provide a clean full sound quality that enhances
intelligibility of the intercom audio.
The headset comes equipped with dual ear muffs, color-coded dual banana plugs,
6-foot (1.8-meter) cord, and mates directly to the communicator.
2.2.6 Item No. 2490SM-28 NOISE REDUCTION HEADSET (Single Ear Muff)
The Model 2490SM-28 Active Noise Reduction (ANR) headset isolates and
reduces topside noise in loud environments dramatically, allowing the tender and
divers to communicate more clearly and comfortably with increased intelligibility.
Amron’s Active Noise Reduction Headset features two key technologies,
unmatched active noise reduction and unique dynamic noise cancelling
microphone. The proprietary electronic circuitry design shapes and equalizes
incoming audio signals to provide a clean full sound quality that enhances
intelligibility of the intercom audio.
The headset comes equipped with a single ear muff, color-coded dual banana
plugs, 6-foot (1.8-meter) cord, and mates directly to the communicator.
2.2.7 Item No. 2405-28 AMRON PUSH-TO-TALK MIC
The Model 2405-28 is a dynamic hand-held push-to-talk microphone that provides
excellent sound quality to the diver. It comes equipped with a spiral cord that can
extend up to 6 feet (1.8 meters).
2.2.8 Item No. 2405NC-28 AMRON NOISE CANCELLING PUSH-TO-TALK MIC
The Model 2405-28 is a noise cancelling hand-held push-to-talk microphone that
provides excellent sound quality to the diver. It comes equipped with a spiral cord
that can extend up to 6 feet (1.8 meters).
2.2.9 Item No. 2822-28 AMRON REMOTE WALK-AND-TALK MODULE
Designed for Full Duplex (4-Wire) applications, the Model 2822-28 provides the
tender with mobility around the dive site while maintaining communications with the
diver. It comes equipped with a small clip-on belt module that contains the
connectors for the headset, and 25 feet (7.6 meters) of lightweight flexible cable.
Custom cable lengths are available upon request.