RJE ATT-400/AODC User manual

RJE INTERNATIONAL, INC.
A T T - 4 0 0/AODC
T R AN S PO N DER
U S ER M A N U A L
R E V. A
600-17025

Forward
This manual is comprised of figures and text intended to provide descriptions and
instructions for the installation, operation, and maintenance of the RJE
International ATT-400/AODC Series Acoustic Target Transponder. The information
herein is arranged into chapters and sections as follows:
Chapter 1 –An overview of the ATT-400/AODC. General notes including brief
sections describing the applications and physical characteristics of the beacon itself.
Chapter 2 –Specifications. Section comprised of a list of both general and unique- to-
the-unit specifications.
Chapter 3 –Operation and Installation Notes. Sections detail the unpacking and
pre-deployment checkout procedures for the ATT-400/AODC.
Chapter 4 - Maintenance. Sections detail periodic maintenance, battery replacement and
calibration procedures.
Please forward comments, questions, suggestions, or problems with the text,
figures, or equipment to RJE International.
RJE International, Inc.
Tel: [phone]
Fax:[phone]
Email:[e-mail]
www.rjeint.com/contact/
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PROPRIETARY MATERIAL
The descriptions, procedural information, photos, figures, drawings, and illustrations in this manual are the
property of RJE International, Inc. Materials may not be reproduced or disseminated without the prior
written consent of RJE International, Inc.
RJE International, Inc. reserves the right to make changes in design or specifications at any time without
incurring any obligation to modify previously installed units.
This manual is provided for information and reference purposes only and is subject to change without
notice.
LIMITED WARRANTY
RJE International, Inc. (RJE) guarantees its products to be free from defects in materials and
workmanship for a period of one year from the date of shipment. In the event a product
malfunctions during this period, RJE’s obligation is limited to the repair or replacement, at RJE’s
option, of any product returned to the RJE factory. Products found defective should be returned to
the factory freight prepaid and carefully packed, as the customer will be responsible for any damage
during shipment.
Repairs or replacements, parts, labor, and return shipments under this warranty will be at no cost to
the customer. This warranty is void if, in RJE’s opinion, the product has been damaged by accident or
mishandled, altered, or repaired by the customer, where such treatment has affected its
performance or reliability. In the event of such mishandling, all costs for repair and return freight will
be charged to the customer. All products supplied by RJE that are designed for use under hydrostatic
loading have been certified by actual pressure testing prior to shipment. Any damage that occurs as
a direct result of flooding is NOT covered by thiswarranty.
If a product is returned for warranty repair and no defect is found, the customer will be charged a
diagnostic fee plus all shipping costs. Incidental or consequential damages or costs incurred as a
result of a product’s malfunction are not the responsibility of RJE.
All returned products must be accompanied by a Case Number issued by RJE International, Inc.
Shipments without a Case Number will not be accepted.
LIABILITY
RJE shall not be liable for incidental or consequential damages, injuries, or losses as a result of the
installation, testing, operation, or servicing of RJE products.
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RETURN PROCEDURE
Before returning any equipment to RJE, you must contact RJE and obtain a Case Number. The Case
Number assists RJE in identifying the origin and tracking the location of returned items.
When returning items to RJE from outside the United States, follow the checklist presented below
to prevent any delays or additional costs.
Include with all shipments two copies of your commercial invoice showing the value ofthe
items and the reason you are returning them. Whenever possible, send copies of the
original export shipping documents with theconsignment.
Route via courier (FedEx or UPS).
If there is more than one item per consignment, include a packing list with the shipment. It
is acceptable to combine the commercial invoice and packing list with the contents of each
carton clearly numbered and identified on the commercial invoice.
If it is necessary to ship via airfreight, contact RJE for specific freight forwarding instructions.
You will be charged for customs clearance and inboundfreight.
Insure the items for their full value.
Refer to the RJE-issued Case Number on all documents andcorrespondence.
Prepay the freight.
TITLE
Title shall pass to buyer on delivery to carrier at Irvine, CA. Risk of damage or loss following such delivery
shall be to the buyer and RJE International shall in no way be responsible for safe arrival of the shipment.
Title shall so pass to buyer regardless of any provision for payment of freight or insurance by RJE
International or in the form of shipping documents. If shipment is consigned to RJE International, it shall
be for the purpose of securing buyer’s obligations under the contract.
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TABLE OFCONTENTS
FORWARD
WARRANTY
1 –Introduction to the ATT-400/AODC
1.1 Overall Description ........................................................................................................1
1.2 ATT-400/AODC Acoustic Transponder..........................................................................1
2 –ATT-400/AODC Specifications
2.1 ATT-400/AODC Specifications ......................................................................................3
3 –Operation & Installation Notes
3.1 Introduction....................................................................................................................4
3.2 Unpacking......................................................................................................................4
3.3 Pre-Deployment Check..................................................................................................5
4 –ATT-400/AODC Maintenance
4.1 Maintenance..................................................................................................................6
4.2 Battery Test ...................................................................................................................6
4.3 Replacing the ATT-400/AODC Batteries .......................................................................7
ILLUSTRATIONS
FIGURE 1-1 Model DTI-300/AODC Diver Transponder Interrogator...................................1
FIGURE 1-2 Model ATT-400/AODC Acoustic Target Transponder.....................................2
FIGURE 3-1 ATT-400/AODC Disassembly..........................................................................4
FIGURE 4-1 ATT-400/AODC Disassembly..........................................................................7
FIGURE 4-2 ATT-400/AODC Battery Connections..............................................................7
FIGURE 4-3 ATT-400/AODC Battery Installation ................................................................8
TABLES
TABLE 2-1 ATT-400/AODC Specifications..........................................................................3
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1.1 Overall Description
The RJE International ATT-400/AODC Acoustic Transponder is an underwater acoustic signaling
device that works with the DTI-300/AODC interrogator and Sonardyne’s tracking systems for
marking and relocating diving bells. The ATT-400/AODC Transponder meets the DNV
specifications for offshore use.
1.2 ATT-400/AODC Series Acoustic Target Transponder
The ATT-400/AODC transponder is a small battery operated underwater acoustic device
that works with the DTI-300/AODC and Sonardyne Homer-Pro receiver and Ranger2 USBL
tracking systems. It is designed to meet DNV-OS-EA02 STI-350 for marking commercial
diving bells in a range of up to 750 meters (2461ft). ATT-400/AODCST comes in two models
that are based on the factory set receive frequency, 38.5kHz (Ch-A) and 39.5kHz (Ch-B).
Once deployed, a water switch activates the transponder. The activated ATT-400/AODC
remains in the receive mode for up to 36 months, waiting quietly for an interrogation signal
from a transponder interrogator. Once interrogated, the ATT-400/AODC transponder
responds to the interrogator with a 37.5Khz acoustic signal.
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Section
1
Figure 1-1
DTI-300/AODC Diver Transponder
Interrogator

Constructed of non-corrosive material, the ATT-400/AODC transponders can be deployed to
depths from 100 meters to 6000 meters, depending on the Model.
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Figure 1-2
ATT-400/AODC Transponder

Specifications are subject to change.
2.1 ATT-400/AODC Acoustic Target Transponder Specifications
Table 2-1 ATT-400/AODC Series Acoustic Transponder
Specifications
Receive Frequency
38.5kHz (CH-A) and 39.5kHz (Ch-B) factory set
Acoustic Source Level
180 dB re 1µPa @ 1 meter
Transmit Repetition Rate
Normal: 1.0 second
Transmit Pulse Length
5.0 ms
Transmit Frequency
37.5kHz
Transponder Turnaround Time
Compensation
125.8 ms
Activation
Water Activated Switch
Battery
9 Volt Battery, Alkaline or Lithium
Range
750m (2461ft) with DTI-300/AODC
Operating Life
Alkaline Battery: 18 Months Stand-by or 1,000,000 Replies in
Transponder Mode. 12 Days in Pinger Mode
Lithium Battery: 36 months Stand-by or 2,000,000 Replies in
Transponder Mode. 24 Days in Pinger Mode
Operational Depth
1,000 Meters (3,281ft)
Housing Material
Anodized Aluminum
Dimensions
30cm x 6.4cm(12.0in x 2.5in)
Weight
In Air: 2.0lbs (907g)
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Section
2

OPERATION & INSTALLATION NOTES
3.1 Introduction
The ATT-400/AODC is a small, self-contained acoustic device that can operate as a
transponder. Using a water switch, the ATT- 400/AODC activates once it is placed in the
water and shuts down when removed from the water. It operates in both fresh and
saltwater environments.
Once wet the ATT-400/AODC will remain activated for up to thirty-six months (based on the
battery type) while it waits to receive a coded interrogation signal from a transponder
interrogator.
3.2 Unpacking
When opening the shipping carton, carefully inspect each piece of equipment as it is
unpacked and report any damage to the freight carrier and to RJE International.
As with any sophisticated electronic equipment, RJE International products should be
handled with a reasonable amount of care during unpacking, transporting, and storing. Pay
attention to make sure that:
• The end caps are properly secured, and the end cap screws aretightened.
• There is no damage to the housing.
Figure 3-1 ATT-400/AODC Disassembly
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Section
3

3.3 Pre-Deployment Check
Perform an in-air check by using the DTI-300/AODC interrogator with the following
sequence:
Turn the DTI-300/AODC receiver on by using the main power switch and press
any control switch before 10 seconds pass to confirm activation.
On the DTI-300/AODC, press UP or DOWN buttons to select the proper
channel (Ch-A) or (Ch-B) for the model of the ATT-400/AODC being used.
Aim the DTI-300/AODC transducer at the transponder. Observe the
interrogator T (transmit) flash and verify that the R (receive) flashes
alternately. The unit will display an intermittent range and bearing to the
transponder being tested.
Note: The range and bearing acquired during in-air testing will not be accurate as
the air is a slower and more difficult sound medium than water. If the in-air testing
is not satisfactory, submerge the units in water and repeat the test.
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ATT-400/AODC MAINTENANCE
4.1 Maintenance
Upon completion of each dive mission, take these steps to assure continued reliable
performance from the ATT-400/AODC.
• Wash the exterior of the equipment with fresh water and mild detergent.
Make sure to clean filmy build-up on the transducer face.
• Make sure the equipment has been thoroughly dried before storage.
• Inspect all system components for damage and wear. Orderneeded
replacement parts if required.
4.2 Battery Test
This test allows you to roughly determine the state of the 9-volt battery
without removing the battery from the unit. All batteries are different, and
we recommend that you replace the battery after every deployment to
ensure full operational life.
Using a Volt/Ohm Meter (VOM) set to measure DC voltage, place the meter’s
probes across the water switch contacts, which you can find on the top of
the transducer. Measure the voltage and use the chart below. Note: Polarity
is not important in this measurement.
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Section
4
Voltage Reading
Battery Status
>/= 3 vdc
New
>/= 2.8 vdc
Good
>/= 2.75 vdc
Marginal
< 2.75 vdc
Replace

4.3 Replacing the ATT-400/AODC batteries
The batteries in the ATT-400/AODC transponder should be replaced after eighteen
to thirty-six months, based on model, or prior to each use. To change the ATT-
400/AODC batteries follow this procedure:
• Gently loosen and remove the end cap assembly from the housing by turning
the housing counter-clockwise.
Figure 4-1 ATT-400/AODC Disassembly
• Remove the old batteries and install the new batteries as shown. Note the
battery terminal orientation before making a connection. Ensure the battery
terminals are fullyseated.
Figure 4-2 ATT-400/AODC Battery Connections
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Rotate the transponder assembly and repeat the same steps for the opposite
side.
Figure 4-3 ATT-400/AODC Battery Installation
• Before installing the end cap assembly, make sure the O-ring and O-ring surfaces
are clean and free of debris. Lubricate the O-ring with a light coat of silicon grease
(O-lube) supplied in the spareskit.
• Reassemble the unit.
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