2820A AND 2825A TWO DIVER COMMUNICATOR USER MANUAL
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TABLE OF CONTENTS
1INTRODUCTION AND SPECIFICATIONS ..........................................................................................1
1.1 INTRODUCTION...........................................................................................................................1
1.2 ELECTRICAL SPECIFICATIONS................................................................................................1
1.3 MECHANICAL SPECIFICATIONS...............................................................................................2
1.4 AMCOM II MODEL 2820A DIVER COMMUNICATOR................................................................3
1.5 AMCOM II MODEL 2825A DIVER COMMUNICATOR................................................................4
2LIMITED WARRANTY AND SERVICE POLICY..................................................................................5
2.1 LIMITED WARRANTY..................................................................................................................5
2.2 SERVICE POLICY........................................................................................................................5
3OPTIONS AND ACCESSORIES..........................................................................................................6
3.1 OPTIONS......................................................................................................................................6
3.2 ACCESSORIES............................................................................................................................6
4TENDER AND DIVER CONTROLS AND CONNECTIONS.................................................................8
4.1 TENDER CONTROLS ..................................................................................................................8
4.2 TENDER CONNECTIONS............................................................................................................9
4.3 DIVER CONTROLS....................................................................................................................10
4.4 DIVER CONNECTIONS..............................................................................................................10
4.5 OTHER CONNECTIONS AND CONTROLS..............................................................................11
4.6 OPTION CONTROLS: HELIUM SPEECH UNSCRAMBLER/26DSP3 .....................................12
4.7 OPTION CONTROLS: WIRELESS TENDER /28A OPTION.....................................................13
4.8 DRAWING, 2-WIRE CONNECTIONS ........................................................................................14
4.9 DRAWING, FULL DUPLEX (4-WIRE) CONNECTIONS............................................................15
4.10 DRAWING, OPERATOR CONNECTIONS, P-T-T MICROPHONE ...........................................16
5INSTALLATION AND OPERATION...................................................................................................18
5.1 OPERATION...............................................................................................................................18
5.2 CHARGING THE BATTERIES: /23 AND /24 RECHARGEABLE UNITS .................................18
5.3 BATTERY CONDITION..............................................................................................................19
5.4 BATTERY INSTALLATION –STANDARD AND /23 RECHARGEABLE UNITS.....................19
5.5 BATTERY INSTALLATION –/24 AC POWERED UNITS.........................................................19
5.6 MODES OF OPERATION...........................................................................................................20
5.7 VOLUME CONTROLS –2-WIRE...............................................................................................22
5.8 OTHER DIVER CONTROLS –(2-WIRE) ...................................................................................23
5.9 VOLUME CONTROLS –4-WIRE (FULL DUPLEX)...................................................................23
5.10 OTHER DIVER CONTROLS (4-WIRE MODE) ..........................................................................24
5.11 OTHER TENDER CONTROLS...................................................................................................24
5.12 WIRELESS OPTIONS ................................................................................................................26
6MAINTENANCE AND TROUBLESHOOTING...................................................................................28
6.1 FULL DUPLEX (4-WIRE) CHECK..............................................................................................28
6.2 2-WIRE CHECK..........................................................................................................................28
6.3 GENERAL MAINTENANCE.......................................................................................................29
6.4 RECOMMENDED MAINTENANCE SCHEDULE.......................................................................29
6.5 TROUBLESHOOTING................................................................................................................31
