Amron 2810E-ATEX User manual

User Manual
for
Amron International, Inc.
Model 2810E-ATEX
Dual Lock, ATEX Rated Chamber Communicator
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© 2019 Amron International, Inc.

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TABLE OF CONTENTS
1INTRODUCTION...................................................................................................................................1
2SPECIFICATIONS................................................................................................................................1
2.1 ELECTRICAL................................................................................................................................1
2.2 MECHANICAL...............................................................................................................................1
2.3 MODEL 2810E-ATEX - FRONT PANEL.......................................................................................2
2.4 MODEL 2810E-ATEX – INSIDE OF ENCLOSURE......................................................................3
3ACCESSORIES....................................................................................................................................4
3.1 AMRON STANDARD HEADSET - MODEL 2460-31R.................................................................4
3.2 AMRON CHAMBER SPEAKER - MODEL 3115...........................................................................4
3.3 AMRON CHAMBER SPEAKER - MODEL 3113...........................................................................4
3.4 AMRON INNER-LOCK COMBO BOX - MODEL 3125.................................................................4
3.5 AMRON OUTER-LOCK COMBO BOX - MODEL 3126................................................................4
4CONTROLS AND CONNECTIONS......................................................................................................5
4.1 FRONT PANEL CONTROLS........................................................................................................6
4.2 SYSTEM CONNECTIONS............................................................................................................6
5OPERATION.........................................................................................................................................8
5.1 INITIAL CHECKOUT.....................................................................................................................8
5.2 MODES OF OPERATION.............................................................................................................8
5.3 SETTING THE VOLUME CONTROLS.........................................................................................8
6MAINTENANCE....................................................................................................................................9
6.1 GENERAL MAINTENANCE..........................................................................................................9
6.2 TROUBLESHOOTING..................................................................................................................9
7DRAWINGS ........................................................................................................................................11
7.1 FRONT PANEL PARTS LOCATOR, MODEL 2810E-ATEX ......................................................12
7.2 CONTROL PARTS LOCATOR, GENERAL & MOUNTING DIMENSIONS................................13
7.3 CONTROL PARTS LOCATOR, GENERAL & MOUNTING DIMENSIONS................................14
7.4 SCHEMATIC, CHAMBER COMMUNICATOR, MODEL 2810E-ATEX.......................................15
8PARTS LISTS.....................................................................................................................................16
8.1 MODEL 2810E-ATEX TOP ASSEMBLY ....................................................................................17
8.2 2810E-ATEX RECOMMENDED SPARES .................................................................................17
9LIMITED WARRANTY AND SERVICE POLICY................................................................................18

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1 INTRODUCTION
The 2810E-ATEX is the newest member of the Amron International AMCOM series of chamber
communicators. The 2810E-ATEX is a dual lock chamber communicator that uses state-of-the-art
electronics and introduces several new features. The 2810E-ATEX uses a new audio filtering network
for improved sound clarity and communications. It is important that the operator read and understand
the entire manual including all warnings.
The 2810E-ATEX operates in 2-Wire communication mode. There is a single volume control for the
up-link (Operator) and another volume control for the down-link (Chamber). Designed for a long and
dependable service life, the 2810E-ATEX is housed in a rugged IEC Class 1, Zone 2 rated cast
aluminum enclosure. The communicator comes standard with an 8 ohm MEDC ATEX rated speaker.
Speaker cable, power/chamber/light cable, and all connectors are also ATEX rated.
2 SPECIFICATIONS
2.1 ELECTRICAL
Input Impedance (Microphone Input) ........................................................................300 Ohms
Frequency Response ..........................................................................................300 - 4000 Hz
Common Mode Rejection (minimum)...............................................................................40 dB
Current Drain - Maximum Full Volume........................................................................... 1Amps
Typical Quiescent....................................................................50 -130 mAmps
Minimum Load Impedance .............................................................................................. 4 ohm
Nominal Power Supply Voltage.......................................................................................15 VDC
Operational Supply Voltage................................................................................13VDC - 18 VDC
Sensitivity (Input).......................................................................................................1.8 mVRMS
Maximum Output Power (4 Ohm Load, 14 VDC)..........................................................10 Watts
2.2 MECHANICAL
Enclosure ................................................................................................................. Aluminum
Width.............................................................................................................. 13.0 in. (33.0 cm)
Depth............................................................................................................... 9.0 in. (22.9 cm)
Height with Speaker ...................................................................................... 20.5 in. (52.0 cm)
Weight.............................................................................................................49 lbs. (22.23 kg)

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2.3 MODEL 2810E-ATEX - FRONT PANEL
All of the controls for the Model 2810E-ATEX are located on the front panel with the electrical
connections for power and the chamber accessible via cable located at the bottom of the enclosure.
An ATEX rated speaker is attached to the top of the main enclosure. This speaker acts as the
operator microphone when the PUSH-TO-TALK button is pressed. A complete description of all the
controls is given in section 3.1. The front panel is sealed to the main housing with twelve (12) bolts.
When these bolts are removed, the front panel can be swung open using the hinges located on the
left side of the panel.

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2.4 MODEL 2810E-ATEX – INSIDE OF ENCLOSURE

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3 ACCESSORIES
Amron produces a series of accessories designed to operate with the 2810E-ATEX chamber
communicator.
3.1 AMRON STANDARD HEADSET - MODEL 2460-31R
This light and comfortable headset is designed to extended wear by chamber occupants. The
Model 2460-31R features an adjustable boom microphone, vinyl cushioned adjustable ear
pads and a spiral cord that can be extended up to 8 feet (2.4 meters). It can be plugged into
the headset jacks of most models of Amron Chamber Speakers.
3.2 AMRON CHAMBER SPEAKER - MODEL 3115
The Model 3115 Chamber Speaker allows the operator to monitor conversations within the
chamber with the internal speaker acting as a microphone. There is a speaker on/off switch
that allows the occupants to turn off the speaker for private conversations. The operator can
talk to the occupant(s) by using the PUSH-TO-TALK BUTTON located on the front panel of
the 2810E-ATEX.
3.3 AMRON CHAMBER SPEAKER - MODEL 3113
The Model 3113 Chamber Speaker has all the features of the Model 3115 except for the
speaker on/off switch.
3.4 AMRON INNER-LOCK COMBO BOX - MODEL 3125
The Model 3125 features a talk-back speaker with on/off switch and headset jack that
operates in the same manner as the Model 3115. It also includes a sound-powered phone
with bracket, chamber temperature probe, scrubber power circuit wiring, chamber
environmental conditioning unit wiring and electrical penetrator adaptor all together in a single
pre-wired, pre-tested housing.
3.5 AMRON OUTER-LOCK COMBO BOX - MODEL 3126
The Model 3126 features a talk-back speaker with on/off switch and headset jack that
operates in the same manner as the Model 3115. It also includes the sound-powered phone
and bracket like the Model 3125 but does not have the additional chamber function wiring of
the 3125.

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4 CONTROLS AND CONNECTIONS
Before using the 2810E-ATEX chamber communicator, the operator should be familiar with all the
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.

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4.1 FRONT PANEL CONTROLS
The following controls and connections are located on the front panel of the 2810E-ATEX.
4.1.1 POWER SWITCH – Turns the power on/off to the communicator. It does not affect
the chamber light power. Turn this control to ON to power the communicator and
OFF to turn the communicator off.
4.1.2 LIGHT SWITCH - This switch allows the operator to turn on and off the chamber
light(s). This control is on a separate circuit from the communicator power and is
not affected by the communicator POWER SWITCH
4.1.3 PUSH-TO-TALK BUTTON - This button allows the operator to talk to the chamber
occupant(s) by talking into the HORN SPEAKER while pushing this button.
4.1.4 LOCK VOLUME - This control sets the volume for the chamber. Rotate this knob
clockwise to increase the volume.
4.1.5 OPERATOR VOLUME - This control sets the volume for the HORN SPEAKER.
Rotate this knob clockwise to increase the volume.
4.1.6 HORN SPEAKER – is a waterproof, ATEX rated speaker that allows the operator
to monitor communication to the chamber and acts as a microphone by using the
PUSH-TO-TALK BUTTON. The volume level is controlled by the OPERATOR
VOLUME.
4.1.7 LOCK SELECTOR SWITCH – This rotary switch is used to select which of the two
locks in the chamber that the operator will communicate with. There are three
positions; INNER, BOTH and OUTER. The INNER and OUTER positions allow to
the operator to monitor and talk to the selected chamber only. With the LOCK
SELECTOR SWITCH in the BOTH position, the operator will monitor and talk to
both chamber locks at the same time.
4.2 SYSTEM CONNECTIONS
The 2810E-ATEX system connections are made through the cable location at the bottom of
the enclosure with four twisted wire pairs and an Earth Ground wire.
4.2.1 INPUT POWER – Black & white twisted wire pair. The black wire is connected to
the positive supply terminal and the white wire is connected to the negative supply
terminal. The 2810E-ATEX will accept input voltages from 12 to 24 VDC.
4.2.2 CHAMBER LIGHT – Black & white twisted wire pair. The black wire is connected
to the positive supply terminal and the white wire is connected to the negative
supply terminal. It provides power to the chamber light(s) and is controlled by the
LIGHT SWITCH on the front panel. The current is not limited by communicator
circuitry and the power comes directly from the input power. It is advised that an in-
line fuse holder with the appropriate fuse be installed between the 2810E-ATEX
and the chamber light wiring.
4.2.3 INNER CHAMBER – Black & white twisted wire pair. No polarity is required. It is
connected to the chamber speaker located in the inner lock.
4.2.4 OUTER CHAMBER – Black & white twisted wire pair. No polarity is required. It is
connected to the chamber speaker located in the outer lock.

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4.2.5 EARTH GROUND – Black & white twisted wire pair that connects to the earth or
safety ground. The chassis can be connected to earth ground using either this wire
or the external grounding lug located on the right side of the chassis.

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5 OPERATION
5.1 INITIAL CHECKOUT
After all system connections have been made and inspected, perform the following check out
procedures.
Set all the volume controls to minimum and turn on the POWER SWITCH. If chamber lights
are installed, turn on the LIGHT SWITCH and verify that the chamber light(s) turn on.
The next checkout steps require communicating with someone inside the chamber. The
chamber door will have to be closed to prevent acoustic feedback between the HORN
SPEAKER and the chamber speakers. Set the LOCK VOLUME control to mid-scale. Set the
LOCK SELECTOR SWITCH to the INNER position and slowly turn up the OPERATOR
VOLUME. Verify you can hear the chamber occupant through the HORN SPEAKER of the
2810E-ATEX. Press the PUSH-TO-TALK BUTTON and verify the operator can talk to the
chamber occupant. Adjust the LOCK VOLUME control as necessary.
Repeat the checkout procedure for the outer lock by setting the LOCK SELECTOR SWITCH
to the OUTER position. Once communications has been verified with both lock, set the LOCK
SELECTOR SWITCH to the BOTH position and verify communications to both locks at the
same time.
Once operation has been verified, turn down the volume controls to the minimum value and
turn off the POWER SWITCH.
5.2 MODES OF OPERATION
Unlike other AMCOM communicators, the 2810E-ATEX operates in the 2-Wire mode only.
For the 2810E-ATEX, 2-Wire communications is defined as a single communication path with
the chamber occupant(s) having the priority signal path and the operator listens to the
occupants. Signal reversing is accomplished by pushing the PUSH-TO-TALK BUTTON.
When pressed, the occupant(s) hears the operator who talks using the HORN SPEAKER.
One advantage of 2-Wire mode is that the operator's microphone is not active unless the
PUSH-TO-TALK BUTTON is pressed. This prevents noise from the outside reaching the
chamber occupant(s) and allows the operator to communicate with other members of the
chamber operations crew without involving the occupant(s).
5.3 SETTING THE VOLUME CONTROLS
Turn power switch to ON, turn speaker switch to ON, and adjust both volume controls to mid-
scale. The operator has to depress PUSH-TO-TALK BUTTON in order to talk to chamber
occupant(s). Operator and occupant(s) talk to each other while the operator adjusts the
volume controls as below:
OPERATOR VOLUME
While chamber occupant(s) is talking, the operator adjusts this OPERAOTR VOLUME control
to a comfortable hearing level.
LOCK VOLUME
While operator depresses the PUSH-TO-TALK button and talks into the HORN SPEAKER,
the operator adjusts the LOCK VOLUME control to a comfortable level for the chamber
occupants.

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6 MAINTENANCE
The following section describes the general maintenance and troubleshooting procedures for the
2810E-ATEX chamber communicator.
6.1 GENERAL MAINTENANCE
The 2810E-ATEX chamber communicator is designed to provide years of continuous, failure-
free service when properly used and maintained. One of the most important things that can
be done to extend the service life is to clean the communicator after use or when needed. If
the equipment is on an extended work program, have the tender clean the equipment during
slow work periods. Rinse off salt deposits with fresh water.
6.1.1 DAILY MAINTENANCE
Wipe off any accumulated salt or salt spray on the front panel using a clean, damp
cloth. Pay particular attention to where the various front panel components attach
to the panel. Inspect the outer case for any damage.
6.1.2 6 MONTH CHECK
Wipe off any accumulated salt or salt spray on the enclosure using a clean, damp
cloth. Pay particular attention to where the various front panel components attach
to the panel. Inspect the outer case for any damage.
Inspect the PUSH-TO-TALK BUTTON, rotary switches and volume controls for
smooth operation.
Perform the system test shown in section 5.1.
6.1.3 LONG TERM STORAGE
If the chamber communicator is to be stored for a period greater than 30 days, it is
recommended that it be stored in a cool dry location. If stored outside, the
communicator should be covered.
6.2 TROUBLESHOOTING
The following section will describe the troubleshooting procedure for several common issues.
If these sections do not cover your particular issue, if is recommended that the chamber
wiring be disconnected from the communicator and the check-out procedures in section 5.1
be conducted. If the chamber communicator passes the check-out procedures then the issue
is most likely in the chamber wiring.
6.2.1 UNIT NOT OPERATING
The most common reason that a diver communicator appears to be dead, when
the POWER SWITCH and SPEAKER SWITCH are turned on, is that the 24V
power supply is not on or is damaged.
If the 24V power supply and connections appear to be good and the communicator
fails the check-out procedure, then remove the (12) bolts holding the front panel
and carefully swing open as the components are connected to the 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 FH1 and is a cylindrical component.

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Verify that the fuse is good by checking the continuity with a multi-meter. If the fuse
is open, replace with a same type: 3.15 Amp, 250V, Fast Acting. Close the front
panel, re-install the (12) bolts and re-test the communicator. If the communicator
still appears dead, contact Amron per section 2.2 for further assistance.
6.2.2 LOW VOLUME
Check the volume control settings and adjust if necessary. Check the chamber
connections and verify that the chamber and operator are connected as intended.
Verify the wires and connectors are clean and tight. Check the 24V power supply
for proper voltage to the unit. If the problem persists, disconnect the chamber
wiring and perform the communicator check out procedure per section 5.1. If the
communicator fails the check-out procedure, contact Amron per section 2.2 for
further assistance.
If the communicator checks out, then the problem is likely in either the chamber
wiring, the wiring of the chamber speaker(s), or the occupant headset.
6.2.3 GARBLED VOICE TO THE CHAMBER
The CHAMBER VOLUME control is set too high. Reduce this control until the voice
signal clears. If this does not solve the problem, check the chamber speaker and/or
headsets for corrosion or other defect. Replace if necessary if these steps have
not solved the problem, then disconnect the chamber wiring and perform the
communicator check out procedure per section 5.1. If the communicator fails the
check-out procedure, contact Amron per section 2.2 for further assistance. If the
communicator checks out, then the problem is likely in the chamber wiring.
6.2.4 GARBLED VOICE TO THE OPERATOR
The OPERATOR VOLUME control is set too high. Reduce this control until the
voice signal clears. If this does not solve the problem, check the chamber speaker
or occupant(s) headset microphone for corrosion or other defect. Replace if
necessary. If this solves the problem then the operator headset may be wet or
defective. If these steps have not solved the problem, then disconnect the chamber
wiring and perform the communicator check out procedure per section 5.1. If the
communicator fails the check-out procedure, contact Amron per section 2.2 for
further assistance. If the communicator checks out, then the problem is likely in the
chamber wiring.
6.2.5 CHAMBER CUTS OFF
This is usually caused by an intermittent connection either between the chamber
wiring and the chamber communicator or the cable penetrator and the chamber
speaker or occupant headset. Check all connections to verify that they are clean
and tight. If the problem continues, then substitute the communication cable with a
known good cable. If this solves the issue, then the communication cable in the
original umbilical is damaged and needs to be replaced or repaired. If none of
these solutions fixes the problem then contact Amron per section 2.2 for further
assistance.

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6.2.6 PUSH-TO-TALK DOES NOT WORK
Please turn the inner/both/outer lock selector switch to the desired setting. Please
confirm that the selector switch is properly engaged for the chosen setting. Check
that the volume controls for both the inner & outer lock are turned up to mid-scale.
If no communication is heard inside the chamber locks, there could be a broken
wire inside the chamber communicator. Open the front panel and inspect. If that
does not resolve the problem then contact Amron per section 2.2 for further
assistance.
7 DRAWINGS
The following drawings illustrate the electrical and mechanical details of the chamber 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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7.1 FRONT PANEL PARTS LOCATOR, MODEL 2810E-ATEX

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7.2 CONTROL PARTS LOCATOR, GENERAL & MOUNTING DIMENSIONS

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7.3 CONTROL PARTS LOCATOR, GENERAL & MOUNTING DIMENSIONS

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7.4 SCHEMATIC, CHAMBER COMMUNICATOR, MODEL 2810E-ATEX

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8 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: [phone] Fax: [phone]
Email: [e-mail]
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.

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8.1 MODEL 2810E-ATEX TOP ASSEMBLY
Reference
Part Number
Description
1
520-0006-01
Enclosure, Model 2810E-ATEX
2
100-0001-01
Speaker, MEDC, ATEX, 8 Watt, 8 Ohm
3
570-1000-03
PCA for Chamber Communicator
4
520-0007-01
Power Supply, DIN MINI-PS, 12-24 DC
5
520-0008-01
DIN Rail, NS 15 Perforated
6
7996-1
Mounting Pan
7
520-0009-01
Cable Connector, M20
8
520-0010-01
Cable Connector, ½” MNPT
9
180-0100-01
Cable, 3 Conductor, Armor & Sheath
N/S
112-0100-01
Potentiometer, 10K 20% .5W
11
520-0011-01
Connector, ¾” MNPT
12
180-0101-01
Cable, 5 Pair, Shielded, Armor & Sheath
13
4-40X3/4SSPHP
Screw, 4-40X3/4 S/S, Phillips
14
10-32x1/2SSPSP
Screw, 10-32X1/2 S/S, Phillips
15
10NUTSS
Nut, Locking, 10-32, S/S
16
8-32x1/2SSPHP
Screw, 8-32X1/2in S/S, Phillips
17
1452-A
Hex Spacer, 3/8
18
4NUTSSL
Nut, Locking, 4-40, S/S
N/S
1902A
Standoff, 4-40X1/4in, Nylon, Hex
N/S
43025-1200
Receptacle, 12 Pin, Micro-Fit
N/S
43025-1600
Receptacle, 16 Pin, Micro-Fit
N/S
43030-0007
Contact, 3.0mm, Female Socket
N/S
39-01-4040
Receptacle, 4 Pin, Mini-Fit
N/S
39-00-0039
Terminal, Female, Crimp Mini-Fit
N/S
61310
Terminal, Ring, 16-14 AWG
N/S
10/18-22
Terminal, Ring, 18-22 AWG
8.2 2810E-ATEX RECOMMENDED SPARES
Reference
Part Number
Description
Quantity
N/S
112-0100-01
Potentiometer, 10K 20% .5W
2
19
0034.6019
Fuse, PCA, 3.15A/150V Micro Quick
1