Amron 2820A-03 User manual
Amron 2820A-03 is a chamber communicator that provides reliable and clear communication in demanding environments. It is designed to meet the specific needs of professionals working in industrial settings, security, and public safety. With its advanced features and rugged construction, the Amron 2820A-03 is an essential tool for effective and efficient communication.
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User Manual
For
Amron International, Inc.
Models 2820A-02 & 2820A-03
Chamber Communicators
S/N ____________________
1380 Aspen Way, Vista California 92081-8349
United States of America
Phone: (760) 208-6500
Fax (760) 599-3857
Email: [email protected]
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© 2018 Amron International, Inc.
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
TABLE OF CONTENTS
AMRON SINGLE EARPIECE HEADSET – MODEL 2460SM-28 ................................................. 3
AMRON CHAMBER EXTENSION CABLE – MODEL 2460-31R-25 ............................................ 3
AMRON REMOTE WALK-AND-TALK MODULE - MODEL 2822-28 ........................................... 3
AMRON REMOTE PUSH-TO-TALK MODULE - MODEL 2821-28 .............................................. 3
AUDIO ADAPTOR CABLE - AMRON PART NUMBER 180-1000-00 .......................................... 4
AMRON CHAMBER COMMUNICATION BOX – MODEL 3113 ................................................... 4
AMRON CHAMBER COMMUNICATION BOX – MODEL 3113 ................................................... 4
AMRON CHAMBER COMMUNICATION BOX – MODEL 3115 ................................................... 4
AMRON CHAMBER ENTERTAINMENT SPEAKER – MODEL 3130 .......................................... 5
DRAWING, 2820A-02 & 2820A-03 TO CHAMBER WIRING DIAGRAM .................................... 13
CHAMBER COMMUNICATOR CHECK PROCEDURES ........................................................... 17
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REAR PANEL PARTS LOCATOR, MODELS 2820A-02 & 2820A-03 ........................................ 25
10.1
10.2
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1 INTRODUCTION
The Amron International AMCOM II 2820A-02 and 2820A-03 are full featured; two lock chamber communication systems that provide reliable, two-way communications between the chamber operator and occupants. Both models are used in conjunction with chamber talk back speakers such as the Amron Model 3113, 3114, 3115, 3125 or 3126. The AMCOM II chamber communicators include a rechargeable battery that maintains communication in the event of a power failure along with a universal input 90-264 VAC, 47-440 Hz internal power supply. The 2820A-03 has all the features of the 2820A-02 but also includes a separate entertainment amplifier circuit. This circuit is used with the Amron Model 3130 Entertainment Speaker to provide audio entertainment to the chamber occupants.
The AMCOM II Chamber Communicators have independent volume controls for the operator, inner lock and output lock. There are separate on-off controls for each lock and both models are supplied with the Amron Model 2405-28 Push-to-Talk microphone for use by the operator. The 2820A-02 and
2820A-03 can operate in 2-Wire or Full Duplex (4-Wire) modes as described later in this manual.
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2 SPECIFICATIONS
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
2.1
2.2
ELECTRICAL
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, 47-440 Hz
Sensitivity (Input) ............................................................................................................. 0.5 mV
Output Power (RMS @ 4 Ohm Load, 12 VDC) .................................................. 10 Watts Audio
Battery Life ................................................................................................................... 45 Hours
MECHANICAL
Panel ............................................................................................................... Stainless Steel
Enclosure ......................................................................................... Black Anodized Aluminum
Width ........................................................................................................... 10.1 in. (25.7 cm)
Depth ............................................................................................................. 7.5 in. (19.1 cm)
Height ............................................................................................................. 8.0 in. (20.3 cm)
Weight with Battery ............................................................................................. 14 Lbs. (6.4 kg)
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3 ACCESSORIES
Amron produces a series of accessories designed to operate with the AMCOM II chamber communicators.
3.1 AMRON HEAVY-DUTY HEADSET - MODEL 2401-28
3.2
The Model 2401-28 is a heavy-duty headset with boom microphone. It comes equipped with color-coded, dual banana plugs that mate directly to AMCOM diver communicators. It includes a six foot (1.8 meter) cord.
AMRON STANDARD HEADSET - MODEL 2460-28
3.3
3.4
The Model 2460-28 is a light and comfortable headset designed for extended wear at an economical price. It comes equipped with color-coded, dual banana plugs that mate directly to AMCOM diver communicators as well as a spiral cord that can be extended up to 8 feet
(2.4 meters).
AMRON SINGLE EARPIECE HEADSET – MODEL 2460SM-28
The Model 2460SM-28 is a single earpiece version of the Model 2460-28 headset. The single earpiece design allows the operator to hold conversations with other personnel without having to remove the headset.
AMRON CHAMBER HEADSET - MODEL 2460-31R
3.5
3.6
3.7
The Model 2460-31R is a lightweight headset for use inside hyperbaric chambers. It comes equipped with a spiral cord that can be extended up to 8 feet (2.4 meters) and 4-pin connector that mates with chamber communication boxes.
AMRON CHAMBER EXTENSION CABLE – MODEL 2460-31R-25
The Model 2460-31R-25 provides a 25 foot (7.6 meters) extension cable to the Model 2460-
31R chamber headset.
AMRON REMOTE WALK-AND-TALK MODULE - MODEL 2822-28
Designed for 4-Wire (Full Duplex) 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.
AMRON REMOTE PUSH-TO-TALK MODULE - MODEL 2821-28
Designed for 2-Wire applications, the Model 2821-28 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 a Push-to-Talk switch, connector for the headset, and 25 feet (7.6 meters) of lightweight flexible cable. Custom cable lengths are available.
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3.8 AUDIO ADAPTOR CABLE - AMRON PART NUMBER 180-1000-00
Adapter cable is 6.5 feet (2 meter) long with two RCA Phono plugs that connect the auxiliary audio input to a standard 3.5 mm stereo phone plug which mates to the headphone jack of most common portable audio devices.
AMRON CHAMBER COMMUNICATION BOX – MODEL 3113 3.9
The Model 3113 provides communications between the operator and chamber occupants. It includes a 15 Watt, 8 Ohm speaker for 2-Wire operation and includes a headset connector for Full Duplex (4-Wire) communications mounted in a die cast zinc housing with a gray epoxy powder coat.
3.10 AMRON CHAMBER COMMUNICATION BOX – MODEL 3113
The Model 3114 provides 2-Wire communications between the operator and chamber occupants at an economical price. It includes a 5 Watt, 8 Ohm speaker with a 3 foot SJO 18
AWG cable mounted in a die cast zinc housing with a gray epoxy powder coat with stainless steel front panel.
3.11 AMRON CHAMBER COMMUNICATION BOX – MODEL 3115
The Model 3115 Chamber Communication Box provides all the features of the Model 3113 along with a speaker on/off switch. This switch allows private communication when using a headset. This box is approved for U.S. Navy chambers.
3.12 AMRON CHAMBER COMBO BOX – MODEL 3125
The Model 3125 is a combination Chamber Communication and Electrical Junction Box. It is designed for inner lock functions and mounts directly to a chamber penetrator via a penetrator adaptor bushing. It includes a chamber talk-back speaker for 2-Wire communications, a speaker on/off switch, a headset jack for 4-Wire communications, chamber temperature probe, sound powered phone and bracket, and power connection circuit for chamber internal conditioning system and chamber scrubber.
3.13 AMRON CHAMBER COMBO BOX – MODEL 3126
The Model 3126 is a combination Chamber Communication and Electrical Junction Box. It is designed for outer lock functions and mounts directly to a chamber penetrator via a penetrator adaptor bushing. It includes a chamber talk-back speaker for 2-Wire communications, a speaker on/off switch, a headset jack for 4-Wire communications and sound powered phone and bracket.
3.14 AMRON CHAMBER JUNCTION BOX – MODEL 3127
The Model 3127 is an outside chamber junction box for use with the Models 3125 and 3126
Combo Boxes. It includes a 12-pin electrical penetrator, mounting adaptor and MS connector that mates with the Model 3128 wiring harness.
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3.15 AMRON CHAMBER WIRING HARNESS – MODEL 3128
The Model 3128 Chamber Wiring Harness provides all the wiring connections to inner and outer locks. It includes all the wiring for communicators.
3.16 AMRON CHAMBER ENTERTAINMENT SPEAKER – MODEL 3130
The Model 3130 Chamber Entertainment Speaker includes a 15 Watt, 8 Ohm music quality speaker with Mylar impregnated cloth cone along with six 1/8 inch phone jacks for optional headset. It is mounted in aluminum housing with epoxy powder coat and stainless steel speaker grill.
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4 CONTROLS AND CONNECTIONS
Before using the 2820A-02 and 2820A-03 Chamber Communicator, the operator should be familiar with all the operating controls and connections. While reading this manual, you will find capitalized words such as PANEL SPEAKER. These words are to remind the reader that additional information can be found in this section of the manual. All sections that describe features or functions for the
2820A-02 apply to the 2820A-03 unless otherwise noted.
4.1 OPERATOR AND LOCK CONTROLS
4.1.1
4.1.2
4.1.3
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POWER SWITCH – This switch controls power to the unit.
SPEAKER SWITCH – This switch allows the tender to turn off the speaker. If the tender is using a headset, it may be necessary to turn off the speaker in order to prevent acoustic feedback.
PUSH-TO-TALK BUTTON – This switch allows the operator to talk to the chamber occupants when operating in the 2-Wire mode. It is not necessary to use this control in the Full Duplex (4-Wire) mode. When using Full Duplex mode, this control allows the operator to interrupt the audio entertainment by muting when the switch is pressed.
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4.1.4
4.1.5
4.1.6
4.1.7
4.1.8
OPERATOR VOLUME – This control sets the volume for the PANEL SPEAKER and operator headset. Rotate this knob clockwise to increase the volume.
PANEL SPEAKER - The panel speaker features a waterproof speaker that allows the tender to monitor conversations in the chamber. The volume level is controlled by the OPERATOR VOLUME control and it can be turned off using the SPEAKER
SWITCH.
PANEL MIC – A front panel mounted microphone is located next to the PANEL
SPEAKER. It is used by the operator to communicate to chamber occupants. It is active when the SPEAKER SWITCH is on and the PUSH-TO-TALK SWITCH is pressed.
AC POWER INDICATOR – This LED is used by the operator to determine if the communicator is being AC powered. When the LED is off, the communicator is operating on battery power.
BATTERY CONDITION INDICATOR - This LED is used by the operator to determine the available battery level. A steady green light means that the battery level is sufficient to operate the unit. When the battery reaches approximately 3 hours of remaining life, the LED will start blinking at a rate of about once per second. The exact amount of time is dependent on the age and condition of the sealed lead acid battery. When the battery reaches its end-of-charge, the LED will turn off. It is advised that the battery be connected to AC power as soon as possible once the BATTERY CONDITION INDICATOR starts blinking.
4.1.9 INNER LOCK VOLUME – This control sets the volume for the inner lock speaker and/or headsets. Rotate this knob clockwise to increase the volume.
4.1.10 INNER LOCK ON/OFF – This switch allows the chamber operator to turn off all communications with the inner lock. It may be necessary to turn off the one or both locks in order to prevent acoustic feedback if the chamber door is open.
4.1.11 OUTER LOCK VOLUME – This control sets the volume for the outer lock speaker and/or headsets. Rotate this knob clockwise to increase the volume.
4.1.12 OUTER LOCK ON/OFF – This switch allows the chamber operator to turn off all communications with the outer lock. It may be necessary to turn off the one or both locks in order to prevent acoustic feedback if the chamber door is open.
4.1.13 ENTERTAINMENT VOLUME (2820A-03 only) – This control sets the volume for the audio entertainment speakers. Rotate this knob clockwise to increase the volume. The entertainment will be muted when the PUSH-TO-TALK SWITCH is pressed at any volume level.
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4.2
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
OPERATOR CONNECTIONS
4.2.1 OPERATOR HEADSET - This is the dual banana jack (color-coded black) that functions as both an output (earphone) and input (microphone) for the operator as controlled by the PUSH-TO-TALK SWITCH and PUSH-TO-TALK JACK. With this connection, the operator can be wired in either 2-Wire or Full Duplex (4-Wire) mode regardless of the mode used for the chamber.
The operator is connected in 2-Wire mode by stacking both the earphone (black) and microphone (red) banana plugs into this OPERATOR HEADSET jack as shown in the wiring diagram in section 4.4. The chamber does not have to be connected in 2-Wire mode if the operator is in 2-Wire mode. In order to talk to the chamber occupants, the operator must use either the PUSH-TO-TALK SWITCH or PUSH-TO-TALK JACK.
Since the headset microphone is not active until one of the push-to-talk methods is used, there is no chance for acoustic feedback to occur and outside conversation or noise is not transmitted to chamber and the PANEL SPEAKER can be left on. This may, for some situations, make for a better overall communication experience. If the operator requires more mobility, 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 cable lengths are available).
To connect the operator in the Full Duplex (4-Wire) mode, connect the earphone (black) banana plug of the headset to this jack and the microphone (red) to the OPERATOR
MICROPHONE jack (red) as shown in the wiring diagram in section 4.4. In this mode, the operator does not have to use the PUSH-TO-TALK SWITCH to communicate with chamber occupants who are also connected in the Full Duplex (4-Wire) mode. This configuration can be used even if the chamber is connected in 2-Wire mode. In that situation, the tender is required to use the PUSH-TO-TALK SWITCH or PUSH-TO-
TALK JACK.
The headset microphone is always active which means that there can be acoustic feedback between the PANEL SPEAKER and the microphone if the operator is near the communicator. To prevent this, the PANEL SPEAKER can be turned off using the
SPEAKER SWITCH. Another option is to move the operator away from the communicator by using the Amron Model 2822-28 Walk-and-Talk Module accessory.
This allows the operator to communicate while other members of the crew listen using the PANEL SPEAKER. This module comes with 25 feet (7.6 meters) of cable (custom cable lengths are available).
The operator may also use the included Amron Model 2405-28 Push-to-Talk
Microphone. This microphone comes with two color-coded banana plugs. The black plug goes into the OPERATOR HEADSET jack and the yellow plug goes in the PUSH-
TO-TALK JACK as shown in the wiring diagram in section 4.5. To communicate with the chamber occupants, the operator presses the button on the side of the microphone.
There is no chance of acoustic feedback since the PANEL SPEAKER is cut-off when the operator uses the microphone. When using the Push-to-Talk Microphone, the
SPEAKER SWITCH must be turned on in order to hear the chamber.
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4.3
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
4.2.2
4.2.3
4.2.4
OPERATOR MICROPHONE - This is a dual banana jack (color-coded red) that functions as the microphone input from the operator's headset. It is only used if the operator is in Full Duplex (4-Wire) mode.
PUSH-TO-TALK JACK - This is a dual banana jack (color-coded yellow) that allows for remote keying of the push-to-talk function of the communicator. The difference between using the PUSH-TO-TALK JACK and PUSH-TO-TALK
SWITCH is that the switch allows the operator to communicate using the PANEL
MIC. If both are used at the same time, the PANEL MIC is active. This allows a crew member to talk to the chamber occupants using the PANEL MIC even if the operator is away from the communicator using the Remote Push-to-Talk Module in
2-Wire mode.
RECORDER OUTPUT - This is a single RCA Phono jack (color-coded black) that provides a transformer isolated of both the operator and chamber communications.
It is designed to drive the standard line-level inputs of audio or video recorders with input impedances as low as 600 Ohms.
BACK PANEL CONNECTIONS
4.3.1 MS CONNECTOR - There is a 14 pin MS Style connector located on the back panel that provides the electrical connection to the chamber. The pin functions are shown in the following table:
4.3.2
4.3.3
PIN NUMBER FUNCTION
D
I
J
A
B
C
F
G
H
K
L
E
Entertainment Speaker High (4003E Only)
Entertainment Speaker Low (4003E Only)
Outer Lock Microphone High
Outer Lock Microphone Low
Outer Lock Earphone High
Outer Lock Earphone Low
Inner Lock Microphone High
Inner Lock Microphone Low
Inner Lock Earphone High
Inner Lock Earphone Low
External Power +
External Power -
ENTERTAINMENT SPEAKER (2820A-03 only) - This connection is only available on the 2820A-03. It is routed to a separate entertainment speaker, such as the
Amron Model 3130, usually located in the Inner Lock.
OUTER MICROPHONE - This connection functions as both an output (earphone) and input (microphone) for the outer lock occupants as controlled by the PUSH-
TO-TALK SWITCH and PUSH-TO-TALK JACK. Using this connection, the chamber can be wired in either 2-Wire or Full Duplex (4-Wire) mode regardless of the mode used for the operator.
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4.3.4
4.3.5
4.3.6
4.3.7
4.3.8
4.3.9
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
To connect the chamber in Full Duplex (4-Wire) mode, connect the chamber headset microphone pin to this connection as shown in section 4.6.
To connect the chamber in 2-Wire mode, connect the talk-back speaker, such as the Amron Model 3114 Chamber Speaker Box to this connection. You can have a mixed Full Duplex and 2-Wire by having both a talk-back speaker and headset jack by using the Amron Model 3115 Chamber Communicator Box as shown in section
4.6.
OUTER EARPHONE - This connection functions as the output for the chamber headset earphone. It is only used when the chamber is in Full Duplex (4-Wire) mode.
INNER MICROPHONE - This connection has the same function as the OUTER
MICROPHONE but for the inner lock.
INNER EARPHONE - This connection has the same function as the OUTER
EARPHONE but for the inner lock.
EXTERNAL POWER - The communicator can be powered using an external battery or power supply via this connection. The input voltage must be between 9 and 16 VDC and must be able to supply a peak current of 3 Amps for proper operation. The following warning should be followed when using the EXTERNAL
POWER connection. A minimum wire size of 18 AWG and maximum wire run of 3 feet (1 meter) is recommended.
WARNING!
The EXTERNAL POWER input can be used to recharge the 2820A-02 &
2820A-03 rechargeable sealed lead acid battery. If you use an external power supply, the maximum voltage needs to be limited to 9-16 Volts.
ENTERTAINMENT AUDIO INPUT (2820A-03 ONLY)
This is a set of two RCA Phone jacks (color-coded red and white) that provides a means to connect an external audio signal for chamber occupant’s entertainment.
Although this input will accept a stereo audio source, it will be converted into a monaural signal before going to the chamber. The earphone output of most MP3 players can be connected to this input using an adaptor cable like the Amron Audio
Adaptor Cable (Amron Part Number 180-1000-00).
AC POWER INLET
This is a standard IEC type C14 AC Power Inlet. The communicator is shipped with a NEMA 5-15 power cable but the communicator will accept AC input voltages from
90-264 VAC with a frequency 47-440 Hz.
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4.4
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
DRAWING, OPERATOR HEADSET CONNECTIONS
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4.5
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
DRAWING, PUSH-TO-TALK CONNECTIONS
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2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
DRAWING, 2820A-02 & 2820A-03 TO CHAMBER WIRING DIAGRAM
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5 OPERATION
Before operating the communicator, it should be securely mounted to the panel. The panel cutout dimensions are shown in section 8.3.
5.1 CHARGING THE BATTERY
The Models 2820A-02 and 2820A-03 are supplied with a sealed lead acid back up battery. To charge the battery, insert the AC power cord to the AC inlet located on the back of the communicator. The internal battery charger is able to operate on AC input voltages from 90-
264 VAC with a frequency 47-440 Hz. without the user having to make any adjustments.
The internal battery charger is designed to charge the battery in float mode so the charger can be left on indefinitely, without damage, to ensure the battery is fully charged and the unit is ready to use. A fully discharged battery will take approximately 10 hours to reach full charge (depending on the age of the battery and the surrounding temperature). To ensure maximum service life, the battery should be fully charged at least once every six months.
5.2
The operating time for a fully charged battery is approximately 45 hours. The exact operating time depends on the age of the battery and the ambient temperature. The sealed lead acid battery used in the communicator has a service life of 300 full charge/discharge cycles or 3 years. The BATTERY CONDITION INDICATOR will start to blink when the battery has approximately 3 hours operating time remaining. To maximize the service life, the battery should be recharged as soon as possible after the indicator starts to blink. When the battery reaches the full discharge state, the BATTERY CONDITION INDICATOR will turn off and the communicator will shut down.
INITIAL POWER ON - BATTERY CONDITION CHECK
Turn all the volume controls to minimum and turn on the POWER SWITCH. The state of the battery is shown on the BATTERY CONDITION INDICATOR as follows:
• STEADY GREEN - the battery is good and has more than 30% remaining life.
• BLINKING GREEN - the battery is low and has less than 30% remaining life.
• OFF or NO LIGHT - the battery is depleted and needs to be changed/recharged before use.
• STEADY RED - light indicates the battery voltage is too low to operate the unit.
Communication should stop.
The BLINKING GREEN light provides a warning that the battery is low and should be changed or recharged before starting the dive operation. When the indicator starts BLINKING
GREEN during dive operations, there is, depending on age of the battery and the ambient temperature, approximately 24 hours of remaining battery life. This should be sufficient time to safely complete dive operations. A battery that has not been used for a long period of time will exhibit a higher voltage than the actual charge state. This is known as surface charge and will quickly dissipate once the unit is turned on. It is recommended that the unit be left on for
5 minutes before relying on the BATTERY CONDITION INDICATOR.
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5.3
5.4
5.5
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
OPERATING ON AC POWER
The communicator is normally operated on AC power using the internal battery as backup in case of power failures. The internal power supply is designed with medical grade electrical isolation to prevent possible injuries due to electrical leakage. If external power is supplied through the EXTERNAL POWER connection on the MS connector, it should have the same type of isolation to prevent possible electrocution.
MODES OF OPERATION
The Models 2820A-02 & 2820A-03 have the ability to operate in either 2-Wire or Full Duplex
(4-Wire). Both the chamber and the operator can be connected in either mode and a combination of modes can be used. If either the chamber or the operator is wired in 2-Wire mode, the operator must use a push-to-talk, either the PUSH-TO-TALK SWITCH or PUSH-
TO-TALK JACK, when talking to the chamber. Using either push-to-talk method will cut off the entertainment speaker.
2-Wire communication is defined as a single communication path, normally the chamber is the priority signal path – operator listens to chamber. Signal reversing is accomplished by pushing the PUSH-TO-TALK SWITCH – chamber hears the operator. Since only one person can talk at a time, there is a level of discipline that goes with using 2-Wire mode in order to obtain clear communications. One advantage of 2-Wire is that the operator’s microphone is not active unless one of the two push-to-talk controls, PUSH-TO-TALK SWITCH or PUSH-
TO-TALK JACK, are active. This eliminates any possible acoustic feedback between the operator's microphone and the PANEL SPEAKER. It also prevents noise from the outside reaching the chamber occupants and allows the operator to communicate with other crew members without involving the chamber occupants.
4-Wire (Full Duplex) communication is defined as a dual communication path, a signal path
(a pair of wires) for up-link and a signal path (a pair of wires) for down link. A common example of Full Duplex communication is the telephone. Full Duplex (4-Wire) has the advantage of natural communication without having to use the PUSH-TO-TALK SWITCH.
This keeps the operator's hands free to perform other task. It does not require the same level of discipline to achieve clear communications that 2-Wire does. It has the advantage that neither the chamber occupants nor the operator are cut off when the other is talking. 4-Wire does require the chamber occupant, as well as the operator, to wear headsets.
SETTING THE VOLUME CONTROLS
5.5.1 2-WIRE MODE
Turn power switch to ON, turn speaker switch to ON, and adjust all volume controls to mid-scale. The operator has to depress PUSH-TO-TALK BUTTON in order to the chamber occupants. Operator and chamber occupants talk to each other while the operator adjusts volume controls. Adjusting the lock volumes is easier if the other LOCK ON/OFF switch is turned off.
OPERATOR VOLUME – While chamber occupant(s) are talking, the operator adjusts this volume control to a comfortable hearing level at the PANEL SPEAKER or operator headset.
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5.5.2
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
LOCK VOLUME – While operator is talking into the PANEL MIC or hand-held microphone and depressing PTT switch, the operator adjusts this volume control to a comfortable level.
4-WIRE MODE
Turn power switch to ON; turn speaker switch to OFF; adjust volume controls to mid-scale. The operator and chamber occupants use headsets. While talking to each other, the operator adjusts volume controls as below:
OPERATOR VOLUME – While the chamber occupant is talking, the operator adjusts this volume control to a comfortable hearing level.
LOCK VOLUME – While the operator is talking, the operator adjusts this volume control to a comfortable level for the chamber occupants. This should be conducted on each lock individually with the other lock turned off during adjustment process.
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6 MAINTENANCE
The following section describes the procedures for checking the operation of your 2820A-02 &
2820A-03 chamber communicators, general maintenance procedures, and how to troubleshoot common problems.
6.1 CHAMBER COMMUNICATOR CHECK PROCEDURES
The following are a series of step-by-step procedures to perform a functional check of your communicator. Use the appropriate procedure for the chamber communicator wired either 2-
Wire or Full Duplex (4-Wire) mode.
6.1.1 FULL DUPLEX (4-Wire) CHECK
6.1.2
2820A-02-UM
This procedure checks the communicator functions in the Full Duplex (4-Wire) mode.
1. Set all volume controls to the mid-scale (halfway) position.
2. Turn the SPEAKER SWITCH off to avoid acoustic feedback.
3. Turn on the communicator and verify the BATTERY CONDITION INDICATOR is on or blinking. If the LED does not come on at all, then replace or recharge the battery. If that does not resolve the problem, then go to the troubleshooting section to determine the cause.
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 OPERATOR MICROPHONE (red) jack and the headset lead into the OPERATOR HEADSET (black) jack.
6. Don the headset and talk into the microphone. You should be able to hear yourself in the headset. Adjust the OPERATOR VOLUME control and verify the level can be adjusted to a comfortable level.
7. Go into the chamber inner lock and don the chamber headset
8. Talk into the microphone. You should be able to hear yourself in the headset.
9. Repeat in the outer lock.
10. If used, connect a source device, such as a MP3 player, to the
ENTERTAINMENT AUDIO INPUT. Set the volume control of the device to low and start playing music. The music should be heard in chamber entertainment speaker. Adjust the volume as required. Verify that the music is cut off when the PUSH-TO-TALK SWITCH is pressed.
This completes the check of the Full Duplex (4-Wire) function of the communicator.
If at any point in the test you were not able to hear yourself in the headset as indicated by the test, refer to the troubleshooting section to determine the cause.
2-WIRE CHECK
This procedure checks the communicator functions in the 2-Wire mode.
1. Set all the volume controls to the mid-scale (halfway) position.
2. Set all the volume controls to the mid-scale (halfway) position.
REV 1.0
17
6.2
6.3
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
3. Turn the SPEAKER SWITCH off to avoid acoustic feedback.
4. Turn on the communicator and verify the BATTERY CONDITION INDICATOR is on or blinking. If the LED does not come on at all, then replace or recharge the battery. If that does not resolve the problem, then go to the troubleshooting to determine the cause.
5. Have a second person enter the chamber inner lock. Press the PUSH-TO-
TALK SWITCH and talk into the PANEL MIC. Verify the person in the chamber can hear you. Adjust the INNER LOCK VOLUME as necessary.
6. Have the person in the chamber talk into the talk-back speaker. Verify you can hear them. Adjust the OPERATOR VOLUME as necessary.
7. Repeat steps 4 and 5 in the outer lock.
8. Insert the hand-held black plug into the TENDER HEADSET JACK (black).
Insert the yellow plug into the PUSH-TO-TALK JACK (yellow). Press the pushto-talk button and talk into the hand-held microphone. Verify that the person in the chamber can hear you. Remove the hand-held microphone and turn off the
SPEAKER SWITCH.
GENERAL MAINTENANCE
The chamber communicator is designed to provide years of continuous, failure-free service when properly used and maintained. There are a few important things that the user can do to extend the life of their equipment
1. Handle the diver communicator with care. Do not throw it around or drop it. Select a work area where the communicator and wire connecting to it are out of everyone's way so it is not knocked over.
2. Clean the communicator after use or when needed.
3. When using a rechargeable battery, the battery should be recharged after use or as soon as possible when the BATTERY CONDITION INDICATOR starts blinking.
RECOMMENDED MAINTENANCE SCHEDULE
The following sections outline the recommended scheduled maintenance.
6.3.1 DAILY MAINTENANCE
Wipe off any accumulated dirt on the front panel or connectors using a clean, damp cloth. Pay particular attention to where the various front panel components attach to the panel.
6.3.2 WEEKLY MAINTENANCE
Wipe off any accumulated dirt on the front panel or connectors using a clean, damp cloth. Pay particular attention to where the various front panel components attach to the panel. Inspect the PUSH-TO-TALK SWITCH and volume controls for smooth operation. Inspect the PUSH-TO-TALK BUTTON, binding posts and volume controls for smooth operation.
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6.3.3
6.3.4
6.3.5
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
SIX MONTH CHECK
Wipe off any accumulated dirt on the front panel or connectors using a clean, damp cloth. Pay particular attention to where the various front panel components attach to the panel. Inspect the PUSH-TO-TALK BUTTON, binding posts and volume controls for smooth operation.
1. Inspect the PUSH-TO-TALK SWITCH and volume controls for smooth operation.
2. Recharge the battery if the system is in storage and not regularly connected to
AC power.
3. Perform the 2-Wire and Full Duplex (4-Wire) system checks as described in section 4.2.
YEARLY CHECK
For maximum service life, it is recommended that the chamber communicator be sent back to Amron for a yearly check. Every three years it is recommend the rechargeable battery be replaced.
LONG TERM STORAGE
If the communicator is to be stored for a period greater than 30 days, it is recommended that it be stored in a cool dry location. Make sure that the POWER
SWITCH is turned off during storage. The communicator should be stored connected to the AC power if possible to ensure that the communicator will be fully charged and ready to use when needed.
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7 TROUBLESHOOTING
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
Most problems are usually simple issues that can often be found by careful inspection of the chamber communicator and wiring. The following section will describe the troubleshooting procedure for several common issues.
7.1 CONNECTION ISSUES
Most communicator problems are caused by bad connections. Making good connections will result in years of good communications. For longer life, all chamber connections to the MS connector should be soldered and copper wire must be tinned. It is strongly suggested that dual banana plugs be used for operator connection to provide convenient and secure connections. Make sure the MS connector is completely seated and the retaining ring is tight.
If you experience issues, remove the MS connector and inspect for dirt or corrosion; repair or replace if necessary.
7.2 LOW BATTERY INDICATION
The BATTERY CONDITION INDICATOR indicates the battery level or state-of-charge by monitoring the battery voltage. The voltage has to be 9 Volts or greater for the communicator with rechargeable battery to operate. It is recommended that the communicator be recharged for at least 10 hours if the measured voltage is less than 12 Volts (depending on the age of the battery and the surrounding temperature). If the BATTERY CONDITION INDICATOR indicates a low, (blinking LED) or bad (off LED) after charging, then either the battery is bad and needs to be replaced or the charger has malfunctioned.
7.3
WARNING!
When changing the battery it is critical that the RED wire be connected to the positive terminal of the battery and the BLACK wire connected to the negative terminal of the battery.
UNIT NOT OPERATING
The most common reason that a chamber communicator appears to be dead when the
POWER SWITCH and SPEAKER SWITCH are turned on is a bad or loose battery. Check the battery per section 7.2.
If the battery and battery connections appear good and the communicator fails the check-out procedure, then remove the screws holding the front panel. Remove the screw holding the front panel the chassis and lift the front panel up carefully as the panel components are connected to a Printed Circuit Assembly (PCA) by a wire harness. Verify that the connectors on the PCA are firmly seated. Check that the wire harnesses are soldered to the various connectors, controls, and speaker. There should be no loose wires in the system. Remove the fuse from the PCA. It is marked F1 and is a cylindrical component. Verify that the fuse is good by checking the continuity with a multi-meter. If the fuse is open, replace with the same type: 3.15 Amp, 250V, Fast Acting. Reconnect the chassis to the front panel; re-install the communicator into the panel and re-test the communicator. If the communicator still appears dead, contact Amron for further assistance.
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7.4
7.5
7.6
7.7
7.8
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
LOW VOLUME
Check the volume control settings and adjust if necessary. Check the occupant connections and verify that the occupant and operator are connected as intended. Verify the wires and connector are clean and tight (see section 7.4 for additional information). Check the
BATTERY CONDITION INDICATOR and test the battery per section 9.0 if necessary. If the communicator fails the check-out procedure, contact Amron for further assistance.
GARBLED VOICE TO CHAMBER
The LOCK VOLUME control is set too high. Reduce the volume until the voice signal clears.
If this does not solve the problem, check the chamber speaker or headset earphone for corrosion or other defect. Replace if necessary. If the operator is using a headset, remove the headset and communicate to the chamber by pressing the PUSH-TO-TALK BUTTON and talking into the PANEL MIC. If this solves the problem then the operator headset may be wet or defective. If the operator is using the PANEL MIC to talk to the chamber, check the PANEL
MIC for any accumulated dirt and clean if necessary. If these steps do not solve the problem then contact Amron for further assistance.
GARBLED VOICE TO OPERATOR
The OPERATOR VOLUME control is set too high. Reduce the volume until the voice signal clears. If this does not solve the problem, check the chamber talk-back speaker or headset microphone for corrosion or other defect. Replace if necessary. If the operator is using a headset, remove the headset and listen to the chamber using the PANEL SPEAKER. If this solves the problem then the operator headset may be wet or defective. If these steps have not solved the problem, then contact Amron for further assistance.
CHAMBER CUTS OFF
This is usually caused by an intermittent connection between either the chamber and the communicator or the internal chamber wiring and the talk-back speaker or chamber headset.
Check all connections to verify that they are clean and tight. If the problem continues, substitute the chamber to communicator cable with a known good cable. If this solves the issue, then the original cable is damaged and needs to be replaced or repaired. If none of these solutions fixes the problem, contact Amron for further assistance.
FEEDBACK FULL DUPLEX (4-WIRE) MODE
There are two forms of feedback that can affect the communicator: acoustic feedback and cable crosstalk. Acoustic feedback occurs when an active microphone is close enough to pick up and amplify the signal from a speaker or earphone. The required distance between the microphone and speaker/earphone is dependent on the volume setting and the amount of acoustic isolation. For example, an operator headset left sitting on a work table my cause acoustic feedback. When the operator dons the headset at the same volume level, the acoustic feedback will no longer occur. The operator's head provides acoustic isolation between the microphone and earphone of the headset. The same is true for the chamber occupant's headset microphone and earphone.
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2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
7.9
To troubleshoot acoustic feedback issues first determine the source. One way to quickly determine the source of the acoustic feedback is to cover each active microphone with your hand, one at a time. Another method is to adjust the volume controls one at a time. The volume control that stops the feedback indicates the source. For example if the OUTER
LOCK VOLUME control stops the feedback, then the problem is likely in the headset located in the outer lock. Common sources are feedback between the operator’s headset microphone and the PANEL SPEAKER. If the operator wants to operate with the headset and leave the
PANEL SPEAKER on, Amron recommends the tender move away from the unit by using the
Amron Model 2822-28 Remote Walk-and-Talk Module. This module provides an "extension" cord for the tender headset.
Crosstalk is caused by signal leakage between the microphone and earphone wires in the chamber wiring. In a good cable with all the wires open (not connected), the resistance between any two wires should be greater than 10 Meg-Ohms. Over time, the cable can be damaged and this resistance drops to the point that crosstalk can occur. When this occurs, the chamber communication wiring should be replaced. Amron strongly recommends the use of the twisted, shielded wire pairs for all communication cables to prevent cable crosstalk.
PUSH-TO-TALK DOES NOT WORK
If used, check the connection to the handheld microphone. A common issue is that the yellow banana plug is not properly seated in the PUSH-TO-TALK JACK. If the tender is using the
PANEL SPEAKER as the microphone with the PUSH-TO-TALK BUTTON, make sure the
SPEAKER SWITCH is turned on. If neither of these solves the problem, there could be a broken wire inside the diver communicator. Open the front panel and inspect as described in section 4.6. If that does not resolve the problem then contact Amron for further assistance.
PUSH-TO-TALK DOES NOT WORK
If used, check the connection to the handheld microphone. A common issue is that the yellow banana plug is not properly seated in the PUSH-TO-TALK JACK. If the operator is using the
PANEL MIC with the PUSH-TO-TALK SWITCH, make sure the SPEAKER SWITCH is turned on. If neither of these solves the problem, there could be a broken wire inside the chamber communicator. Open the front panel and inspect as described in section 4.6. If that does not resolve the problem then contact Amron for further assistance.
8 DRAWINGS
The following drawings illustrate the electrical and mechanical details of the diver communication unit. The corresponding parts lists for each drawing are detailed in the parts lists section, or are included as part of the drawing. All drawings are at their current revision level as of the date of printing. Amron reserves the rights to revise the documentation without notification.
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8.1
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
FRONT PANEL PARTS LOCATOR, MODEL 2820A-02
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8.2
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
FRONT PANEL PARTS LOCATOR, MODEL 2820A-03
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24
REV 1.0
8.3
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
REAR PANEL PARTS LOCATOR, MODELS 2820A-02 & 2820A-03
ME161-2003
180-1013-01
MS-3102A-20-27P
2820A-02-UM
25
REV 1.0
8.4
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
MOUNTING DETAIL, MODELS 2820A-02 & 2820A-03
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2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
9 PARTS LISTS
The parts lists include both mechanical and electrical parts. The following information will be useful in interpreting data which is not self-explanatory.
REVISIONS
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: [email protected]
Web: www.amronintl.com
When ordering replacement parts, you should give as much information as possible to enable us to supply the correct part. This information should include the part number, description, reference designator, value, radio model number, and serial number. Failure to provide sufficient information may hinder our ability to fill your parts orders promptly and correctly.
9.1 MODELS 2820A-02 & 2820A-03
Ref.
1
2
3
4
5
6
7
8
9
10
2820A-02-UM
Part Number
570-1008-22
2820A-4003-400
4003-502
2405-28
190-0101-01
2890-05
P-2392
2820A-02-UM
9.2
Description
2-DV AMPLIFIER PC CARD, CHAMBER
FRONT PANEL ASSEMBLY
CHASSIS ASSEMBLY
HAND HELD MICROPHONE, PUSH TO TALK
POWER SUPPLY
BATTERY, 12 VDC, RECHARGEABLE
CORD, AC EURO 3 COND
USER MANUAL, 2820A-02 & 2820A-03
2820A-02 & 2820A-03 FRONT PANEL COMPONENTS
Part Number Description
SA818
1498-103
SPEAKER 8 OHM 15 WATT
JACK BANANA BLACK
1498-102
1498-107
ME161-2003
LEDGREEN
JACK BANANA RED
JACK BANANA YELLOW
JACK PHONO W/NYL WSHRS NKL/BLK
LED GREEN BRITE
LEDHOLDER-BLK.25 MOUNTING CLIP FOR 5MM LED
SWB-0001
SW-201
SW-208
BOOT, TOGGLE SOFT GRAY
SWITCH TOGGLE ON/OFF DPDT
SWITCH TOGGLE DPDT-MOMENTARY
27
REV 1.0
2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
Ref.
11
12
13
14
9.3
Part Number
KLN-500B-1/4
91A1AB24B15
24XX-MIC
LT2462-24-D51
Description
KNOB BLACK AL .5DIA .25IN SHAFT
POTENTIOMETER 10K LINEAR
MICROPHONE ASSEMBLY ELECTRET
LED BI-COLOR RED/GREEN
2820A-02 & 2820A-03 REAR CHASSIS COMPONENTS
Part Number
MS-3102A-20-27P
ME161-2003
180-1013-01
9.4
Description
MS CONN BULKHEAD 14 PIN M
JACK PHONO W/NYL WSHRS NKL/BLK
CABLE ASSY AC POWER MODULE
2820A-02-03-FS FIELD SPARES KIT, 2820A-02 & 2820A-03
Part Number
SW-201
SW-208
1498-102
1498-103
1498-107
SWB-0001
91A1AB24B15
KLN-500B-1/4
M-2786
8-32X3/4KTSB
34.6019
LEDGREEN
LT2462-24-D51
LEDHOLDER-BLK.25
9.5
Part Number
570-1008-22
190-0101-01
2405-28
2890-05
Description
SWITCH TOGGLE ON/OFF DPDT
SWITCH TOGGLE DPDT-MOM
JACK BANANA RED
JACK BANANA BLACK
JACK BANANA YELLOW
BOOT, TOGGLE SOFT GRAY
POTENTIOMETER 10K LINEAR
KNOB BLACK AL .5DIA .25IN SHAFT
NUT A/B POTS
SCREW, KNURLED THUMB BRASS
FUSE 3.15A/250V MICRO QUICK
LED GREEN BRITE
LED; BI-COLOR RED/GREEN
MOUNTING CLIP FOR 5MM LED
2820A-02 & 2820A-03 OPTIONAL SPARES
Description
P.C CARD ASSEMBLY
POWER SUPPLY
MICROPHONE PUSH TO TALK
BATTERY 12VDC SLIDE TERM. GEL
Quantity
2
2
1
1
2
1
1
2
2
2
2
1
1
2
Quantity
1
1
1
1
2820A-02-UM REV 1.0
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2820A-02 & 2820A-03 CHAMBER COMMUNICATOR USER MANUAL
Amron International, Inc.
LIMITED WARRANTY & SERVICE POLICY
LIMITED WARRANTY
AMRON INTERNATIONAL, INC., (Amron) warrants that its products are free from defects in material and workmanship under normal use and service for a period of 1 year from date of shipment as described in Amron literature covering this product. 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.
SERVICE POLICY
For technical assistance or to request a repair, please complete the “Amron
Communicator Repair Request” form at: https://www.amronintl.com/communicatorrepair-form or call (760) 208-6500, Monday – Friday, 8 a.m. to 5 p.m. PST.
Both MODEL NO. and SERIAL NO. are required fields to be entered on the Amron
Communicator Repair Request form and can be found on the products identification label as shown below.
“Sample” Product Identification Label
Do Not return any product without obtaining a RMR (Return Materials Request).
Detailed instructions will be provided at the time of request.
1380 Aspen Way, Vista California 92081-8349 U.S.A
Phone: (760) 208-6500 Fax (760) 599-3857
Email: [email protected] Web: www.amronintl.com
2820A-02-UM REV 1.0
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advertisement
Key Features
- Crystal-clear audio quality for effective communication
- Rugged construction for durability in demanding environments
- Multiple modes of operation for versatility and convenience
- Long battery life for extended use
- Intuitive controls for ease of use
- Versatile connectivity options for compatibility with various devices
