Amron 2825A Series User Manual
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Amron 2825A Series User Manual

Portable two diver communicators
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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.
User Manual
For
Amron International, Inc.
Model 2820A-XX & 2825A-XX Series
Portable Two Diver Communicators
S/N ____________________
1380 Aspen Way, Vista California 92081-8349
United States of America
Phone: (760) 208-6500
Fax (760) 599-3857
Email:
sales@amronintl.com
Web:
www.amronintl.com
Copyright© 2020 Amron International, Inc.

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  • Page 1 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.

  • Page 3: Table Of Contents

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL TABLE OF CONTENTS INTRODUCTION AND SPECIFICATIONS ..................1 INTRODUCTION ........................... 1 SPECIFICATIONS ........................1 BATTERY LIFE ..........................2 MATERIALS, WEIGHTS & DIMENSIONS ..................2 OPTIONS AND ACCESSORIES ......................3 OPTIONS ............................3 ACCESSORIES ..........................
  • Page 4 2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL PARTS LISTS ............................. 34 PARTS LIST FOR 282XA-XX SERIES FRONT PANEL ASSEMBLIES........34 PARTS LIST, MODEL 2820A-11, WEATHER RESISTANT AC POWER MODULE ....35 PARTS LIST, MODEL 2825A-11, WEATHER RESISTANT AC POWER MODULE ....35 PARTS LIST, MODEL 2825A-12, WEATHER RESISTANT AC POWER MODULE &...

  • Page 5: Introduction And Specifications

    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 2820A & 2825A series the most versatile and durable communicators anywhere in the world! The AMCOM II Series is a family of full-featured hard-wired, two-diver communicators.

  • Page 6: Battery Life

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL BATTERY LIFE Model 2820A-11 ......................45 Hours Model 2825A-11 ......................45 Hours Model 2825A-12 ......................31 Hours Model 2825A-13 ......................32 Hours MATERIALS, WEIGHTS & DIMENSIONS Front Panel ................Stainless Steel, Powder Coated Enclosure ................

  • Page 7: Options And Accessories

    OPTIONS AND ACCESSORIES The following options are available to customize the 2825A Series AMCOM communicators. 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.
  • Page 8 2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL 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- coded, dual banana plugs that mate directly to AMCOM diver communicators.

  • Page 9: Controls And Connections

    2-Wire mode. It is not necessary to use this control in the Full Duplex (4-Wire) mode and tender wearing a headset. 3.1.5 TENDER MICROPHONE VOLUME (2825A series only) – controls the volume level for the tender's microphone and/or PANEL MICROPHONE. Rotate knob clockwise to increase the tender’s volume to all the divers.
  • Page 10 To prevent this, the PANEL SPEAKER can be turned off using the SPEAKER SWITCH. Another option is to move the tender away from the communicator by using the Amron Model 2822-28 Walk-and-Talk Module accessory. This allows the tender to communicate while other members of the surface crew listen using the PANEL SPEAKER.
  • Page 11 If the tender requires more mobility at the dive site, the Amron Model 2821-28 Remote Push-to-Talk Module can be used to extend the headset cable. It includes a push-to-talk button on a clip- on belt module and comes standard with 25 feet (7.6 meters) of cable (custom...

  • Page 12: Diver Controls & Connections

    SPEAKER unless the PUSH-TO-TALK BUTTON or PUSH-TO-TALK JACK is used. When a pre-amp microphone is used in the 2-Wire mode setup, it is required to have special speakers supplied only by Amron. Contact Amron for more information. To connect the diver in Full Duplex (4-Wire) mode, connect the diver microphone to this jack and the diver earphone the DIVER EARPHONE jack simply stack both plugs into this jack as shown in the 2-Wire wiring diagram section 3.6.

  • Page 13: Helium Speech Unscrambler (Dsp3) Controls

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL 3.2.4 DIVER EARPHONE CONNECTION (BLACK) – is a dual 5-way binding post jack (color-coded black) that functions as the output for the diver's earphone. It is only used when the diver is in Full Duplex (4-Wire) mode. HELIUM SPEECH UNSCRAMBLER (DSP3) CONTROLS The controls for the DSP3 Helium Speech Unscrambler (HSU) are located in the options panel on the right side of the front panel as shown below.

  • Page 14: Wireless Tender (28B) Controls

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL WIRELESS TENDER (28B) CONTROLS 3.4.1 BASE STATION ON/OFF/VOLUME – control is located on the bottom right side of the Base Station. It turns on and off the power to the Wireless Tender Base Station and adjusts the volume level by rotating the knob in either direction.

  • Page 15: Drawing, 2-Wire Connections

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL DRAWING, 2-WIRE CONNECTIONS 282XA-UM REV 5.0...

  • Page 16: Drawing, Full Duplex (4-Wire) Connections

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL DRAWING, FULL DUPLEX (4-WIRE) CONNECTIONS 282XA-UM REV 5.0...

  • Page 17: Drawing, Operator Connections, Hand Held Microphone

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL DRAWING, OPERATOR CONNECTIONS, HAND HELD MICROPHONE 282XA-UM REV 5.0...

  • Page 18: Drawing, Operator Connections, Headset

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL DRAWING, OPERATOR CONNECTIONS, HEADSET 282XA-UM REV 5.0...

  • Page 19: Operation

    Amron cannot guarantee that non-Amron power supplies meet the same high standards and strongly advises against using any such device to power your diver communicator.

  • Page 20: Battery Condition

    Install the battery and close unit in the reverse order. MODES OF OPERATION The 2820A and 2825A series have the ability to operate in either 2-Wire or Full Duplex (4- Wire). Both the diver and tender can be connected in either mode and a combination of modes can be used.
  • Page 21 1/2-inch (12 mm) away. If using the Amron Remote Walk-and-Talk, Model 2821-28, the tender may press the Push-To-Talk Switch on the belt module to speaker to the divers.

  • Page 22: Volume Controls (2-Wire)

    Acoustic feedback can also be avoided by moving the tender away from the communicator by using the Amron Model 2822-28 Remote Walk-and-Talk Module with 25-foot-long cable or the 28B Wireless Tender Option. NOTE: Acoustic feedback may occur when operating with a standby diver who does not have his hat/helmet on.

  • Page 23: Helium Speech Unscrambler Option

    Amron’s advanced NOISE REDUCTION FILTER (NRF) incorporates a complex DSP algorithm which filters out background noise while allowing the diver’s speech to be clear and intelligible. Amron NRF automatically captures the frequency spectrum of applied background noise within the audio frequency bandwidth and reduces it without affecting the diver’s speech.
  • Page 24 ACTIVE NOISE REDUCTION (ANR) OPERATION 4.8.1 Not all noise cancellation headsets are the same. Amron’s new series of Active Noise Reduction (ANR) headsets isolates and reduces topside noise in very loud environments dramatically, allowing the tender and divers to communicate more clearly and comfortably with increased intelligibility.
  • Page 25 4.9 WIRELESS TENDER (28B) OPERATION 4.9.1 Amron’s full duplex 28B Wireless Tender has the capabilities to operate in two separate channels (1 & 2) with up to three (3) topside remote users per channel, totaling a maximum of six (6) remote topside users. By pressing the conference button located on the base station, all remote topside users from both channels (1 &...
  • Page 26 4.11.1 All “Remote” headsets to be fully charged and in the “OFF” position. 4.11.2 Remove base-station from the Amron Communicator lid. Channel selection buttons “#1” and “#2” are located on the rear side of base-station. 4.11.3 Turn Amron Communicator power “ON”.

  • Page 27: Maintenance And Troubleshooting

    4. Identify the microphone and headset leads. When using an Amron headset, the microphone is the red banana plug and the headset is the black banana plug.

  • Page 28: General Maintenance

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL 4. Identify the microphone and headset leads. When using an Amron headset, the microphone is the red banana plug and the headset is the black banana plug. 5. Plug the microphone lead into the TENDER HEADSET (black) jack and the headset lead into the DIVER MICROPHONE (red) jack.
  • Page 29 5.4.4 YEARLY CHECK For maximum service life, it is recommended that the diver communicator be sent back to Amron for a yearly check. 5.4.5 LONG TERM STORAGE If the diver communicator is to be stored for a period greater than 30 days, it is recommended that it be stored in a cool dry location.

  • Page 30: Troubleshooting

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL TROUBLESHOOTING Most problems are usually simple issues that can often be found by careful inspection of the diver communicator, diving umbilical, and diver wiring. The following section will describe the troubleshooting procedure for several common issues. If these sections do not cover your particular issue, it is recommended that the diving umbilical be disconnected from the diver communicator and the check-out procedures in section 5.1 or 5.2 be conducted.
  • Page 31 INDICATOR and test the battery if necessary. If the problem persists, disconnect the diver umbilical and perform the communicator check out procedure per section 5.1 or 5.2. If the communicator fails the check-out procedure, contact Amron for further assistance. If the communicator checks out, then the problem is likely in either the diver umbilical communication cable, the wiring of the diving hat/helmet, or the diver's microphone/earphone.
  • Page 32 If this does not solve the problem and the umbilical cannot be immediately replaced, then operate in 2-Wire mode until a replacement umbilical can be used. Amron strongly recommends the use of the Amron CC1 communication cable. It has been specially designed for clear communications and long service life.

  • Page 33: Drawings

    Open the front panel and inspect. If that does not resolve the problem then contact Amron further assistance. DRAWINGS The reference numbers shown on the parts identifier drawings correspond to the parts lists listed in the parts lists section.

  • Page 34: Parts Identifier, Model 2820A-11 Weather Resistant Ac Power Module

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL PARTS IDENTIFIER, MODEL 2820A-11 WEATHER RESISTANT AC POWER MODULE 282XA-UM REV 5.0...

  • Page 35: Parts Identifier, Model 2825A-11 Weather Resistant Ac Power Module

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL PARTS IDENTIFIER, MODEL 2825A-11 WEATHER RESISTANT AC POWER MODULE 282XA-UM REV 5.0...

  • Page 36: Parts Identifier, Model 2825A-12 Weather Resistant Ac Power Module & Dsp3 Helium Speech Unscrambler

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL PARTS IDENTIFIER, MODEL 2825A-12 WEATHER RESISTANT AC POWER MODULE & DSP3 HELIUM SPEECH UNSCRAMBLER 282XA-UM REV 5.0...

  • Page 37: Parts Identifier, Model 2825A-13 Weather Resistant Ac Power Module & 28B Wireless Tender

    2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL PARTS IDENTIFIER, MODEL 2825A-13 WEATHER RESISTANT AC POWER MODULE & 28B WIRELESS TENDER 282XA-UM REV 5.0...

  • Page 38: Parts Lists

    The parts lists in this manual are for the current model of diver communicator as of the printing date. To Order Replacement Parts Contact: Amron International, Inc. 1380 Aspen Way, Vista, California, 92081 U.S.A. Telephone: (760) 208-6500 Fax: (760) 599-3857 Email: sales@amronintl.com...

  • Page 39: Parts List, Model 2820A-11, Weather Resistant Ac Power Module

    2824-502 CHASSIS ASSEMBLY 190-0101-00 POWER SUPPLY 2890-05 BATTERY, 12 VDC, RECHAREABLE 282XA-UM USER MANUAL, 2820A-01 & 2825A SERIES PARTS LIST, MODEL 2825A-11, WEATHER RESISTANT AC POWER MODULE PART NO. DESCRIPTION 570-1008-20 2-DV AMPLIFIER PC CARD, DELUXE 2820-302 CASE ASSEMBLY WITH POWER MODULE...

  • Page 40: Parts List, Model 2825A-13, Weather Resistant Ac Power Module & 28B Wireless Tender Option

    190-0650-02 REMOTE WIRELESS HEADSET, DUAL EAR MUFFS 190-0650-03 BASE STATION, 8 PORT CHARGER, SPARE BATTERY 282XA-UM USER MANUAL, 2820A-01 & 2825A SERIES PARTS LIST, 2820-302 CASE ASSEMBLY WITH POWER ENTRY MODULE PART NO. DESCRIPTION 2820-3006 LID GASKET (3 FT. REQUIRED)
  • Page 41 2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL PART NO. DESCRIPTION QTY. (FOR 570-1008-XX AMPLIFIER CARD) LEDHOLDER-BLK.25 MOUNTING CLIP FOR 5MM LED LT2462-24-D51 LED; BI-COLOR RED/GREEN LEDGREEN LED GREEN BRITE FUSE; 4A; 250V; SLO-BLO;5X20MM 130-1002-01 (FOR 160-0500-01 POWER ENTRY MODULE) 282XA-UM REV 5.0...

  • Page 42: Limited Warranty And Service Policy

    Amron’s literature covering this product. Oxygen Treatment Hoods and accessories are excluded and limited to 90 days. Amron’s obligation under this warranty is limited to the repair of or replacement, at Amron’s option, of defective material. This warranty shall not cover defects which are the result of misuse, negligence, accident, repair or alterations.

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