IXSEA OCEANO 2500 S-Universal User manual

USER MANUAL
OCEANO 2500 S-Universal
ACOUSTIC
RELEASE

MU_OCEANO2500S-Universal_UK
Issue 10
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This document is the property of IXSEA and shall not be reproduced nor transmitted without written approval
TABLE OF CONTENTS
1. GENERAL INFORMATION...........................................................................................................................4
1.1 INTRODUCTION .................................................................................................................................................4
1.2 TECHNICAL SPECIFICATIONS .............................................................................................................................4
2. DESCRIPTION...............................................................................................................................................5
2.1 GENERAL PRESENTATION..................................................................................................................................5
2.2 MECHANICAL SPECIFICATIONS...........................................................................................................................5
2.2.1 Upper equipped partition................................................................................................................................5
2.2.2 Assembled and equipped lower partition.......................................................................................................5
2.2.3 External assembly..........................................................................................................................................6
2.3 TRANSDUCER...................................................................................................................................................6
2.4 ACOUSTIC COMMANDS......................................................................................................................................6
3. POWER SUPPLY ..........................................................................................................................................9
4. AUTONOMY ..................................................................................................................................................9
5. ACCESSORIES...........................................................................................................................................10
6. OPERATION................................................................................................................................................11
6.1 PRE-DEPLOYMENT CHECKING.........................................................................................................................11
6.1.1 Preliminary ...................................................................................................................................................11
6.1.2 Sending a Command with the TT801 ..........................................................................................................11
6.1.3 Testing the Release Operation ....................................................................................................................12
6.1.4 Testing the Pinger Mode..............................................................................................................................13
6.1.5 Testing the Simple Ranging Operation........................................................................................................13
6.1.6 Testing the Telemetry mode ........................................................................................................................13
6.2 DEPLOYMENT.................................................................................................................................................14
6.2.1 Attaching the Load to the Acoustic Shackle Assembly................................................................................15
6.2.2 Arming the B2S Releasing System..............................................................................................................15
6.2.3 Checking the Acoustic Link..........................................................................................................................19
6.3 RECOVERY.....................................................................................................................................................20
6.4 AFTER RECOVERY..........................................................................................................................................21
7. MAINTENANCE...........................................................................................................................................22
7.1 OPENING THE ACOUSTIC RELEASE...................................................................................................................22
7.2 OPERATIONAL TESTS......................................................................................................................................27
7.3 PREVENTIVE MAINTENANCE.............................................................................................................................27
7.3.1 Transducer cap ............................................................................................................................................28
7.3.2 O-ring seals..................................................................................................................................................28
7.4 STORAGE.......................................................................................................................................................28
7.5 TROUBLESHOOTING ........................................................................................................................................28
8. CUSTOMER SUPPORT..............................................................................................................................28
9. CONTACT....................................................................................................................................................29

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This document is the property of IXSEA and shall not be reproduced nor transmitted without written approval
IXSEA provides a warranty covering this product against any defect in materials or manufacture for a period of
one (1) year from the date of shipment. In the event that such a defect becomes manifest during the stipulated
warranty period, IXSEA undertakes, at its sole discretion, either to repair the defective product, bearing the cost
of all parts and labor, or to replace it with an identical product.
In order to avail itself of the present warranty, Customer must notify IXSEA of the defect before expiry of the
warranty period and take all steps necessary to enable IXSEA to take the required action. Customer shall be
responsible for the packaging and shipment of the defective product for delivery to the repair center notified by
IXSEA, the cost of such shipment being borne by Customer. IXSEA agrees to bear the cost of return shipment
of product to Customer, who undertakes to pay all taxes, dues and expenses arising from such shipment.
This warranty shall not be construed as covering defects, malfunctions or damage caused by improper use or
inadequate maintenance of the product. Under no circumstances shall IXSEA be obligated to provide repair or
replacement under this warranty in order a) to repair damage caused by work done by any person not
representing IXSEA for the installation, repair or maintenance of the product ; b) to repair damage caused by
improper use or connection to incompatible equipment, and specifically, the opening of the housing of the
equipment under warranty shall cause the warranty to be automatically cancelled ; c) to maintain any product
that has been modified or integrated into a larger configuration, if such modification or integration increases the
duration or difficulty of the maintenance of said product.
This warranty covers the product hereunder and is provided by IXSEA in place of all and any other warranty
whether explicit or implicit. IXSEA does not guarantee the suitability of the product under warranty for sale or
any specific use. IXSEA’s liability is limited to the repair or replacement of defective products, this being the
sole remedy open to Customer in the event the warranty becomes applicable. IXSEA cannot be held liable for
indirect, special, subsequent or consequential damage, irrespective of whether IXSEA has or has not received
prior notification of the risk of occurrence of such damage.

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This document is the property of IXSEA and shall not be reproduced nor transmitted without written approval
1. GENERAL INFORMATION
1.1 INTRODUCTION
This manual must be carefully read and understood prior to using an OCEANO 2500 S-Universal Acoustic
Release (ref. AR861B2S).
The manufacturer shall in no case be held liable for any application or use that does not comply with the
stipulations in this manual.
1.2 TECHNICAL SPECIFICATIONS
•Pressure : 624 bar maxi
•Operating temperature : from - 5 °C to + 40 °C
•Storage temperature : from - 20 °C to +70 °C
•Material : Super Duplex stainless steel URANUS 52N (UNS32550)
with high mechanical strength and high sea corrosion resistance
•Length (without ring) : 829 mm
•External diameter : 130 mm
•Weight in air : 30 kg
•Weight in water : 22 kg
•Safe Working Load (SWL) : 2,500 kg
•Release Load (RL) : 2,500 kg
•Test Load (TL) : 5,000 kg
Marking:
Engraving: Serial number
Adhesive label:
-Equipment reference
-Serial number
-Telecommand codes
-SWL
-RL
"IXSEA" logo: Adhesive plastic label.
"Immersion" option:
Thick tube for version with integrity test at 750 bar.

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2. DESCRIPTION
2.1 GENERAL PRESENTATION
The acoustic release model OCEANO 2500 S-Universal operates in the low frequency range (from 8 to 17.5
kHz).
It is mainly made of:
•An acoustic reception, check and transmission electronical assembly.
•An internal battery power supply.
•An acoustic interface made of a low frequency transducer in equal pressure integral with the body of
the acoustic release and fitted with a cage for mechanical protection.
•An UNS 32550 stainless steel type mechanical assembly with high mechanical strength and high
corrosion resistance for Deep Sea applications consisting of a tight housing comprising:
•A tight 624 bar cylindrical tube,
•An upper partition that supports the transducer, with protection cage,
•An internal structure that supports the electronic assembly,
•A lower partition with the release mechanism and a screw opening system.
The following options are available:
•Titanium body (model OCEANO 2500 Ti-Universal, ref. AR861B2T)
•A remote transducer, by separation of the built-in transducer from the acoustic release body
(model OCEANO 2500 S-Universal with Remote Transducer, ref. AR861B2S-HD).
The acoustic actuator may be inserted in a chassis to make a Heavy Duty Acoustic Release for applications
with loads superior to 5 T.
2.2 MECHANICAL SPECIFICATIONS
2.2.1 Upper equipped partition
The upper partition is fitted with a protection cage. A yoke is fitted at the end of this protection cage.
Transducer mechanical interface:
The transducer is fitted directly on the device's upper partition (integral version). The ceramic piezoelectric
sensor is covered by a neoprene hood.
This transducer (Transmitter and Receiver), oil-mounted under equal pressure, features:
•A metallic reflector
•A CE-000192 ceramic ring
•A neoprene hood
2.2.2 Assembled and equipped lower partition
The lower partition is integral with the internal structure that supports the electronic assembly.
It is fitted with a releasing system and a screw opening system.

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2.2.3 External assembly
All standard mechanical sub-assemblies (tube, end plates, cage, yoke, hook) are made from URANUS 52N
Super Duplex stainless steel.
2.3 TRANSDUCER
The acoustic release model OCEANO 2500 S-Universal is fitted with a standard low frequency (8 to 20 kHz)
piezoelectric transducer with hemispherical directivity pattern.
The main acoustic features are as follows:
•Reception bandwidth : 8.5 to 16 kHz
•Transmission bandwidth : 7.5 to 18 kHz
•Directivity diagram : Hemispheric at ± 3 dB
•Response at reception (Sh) : -185 dB ± 5 dB ref. 1V/µPa
•Response at transmission (Sv) : 131.5 dB ± 5 dB ref. 1µPa/V at 1 m.
•Static Capacity : 14 ± 1.5 nF
2.4 ACOUSTIC COMMANDS
The equipment must not execute a command on any parasitic noise. That is why every command must be
preceded by a "ARM" command.
Each "ARM" command corresponds to a "Customer code" specific to each customer.
Command implementation principle:
Note: a new "ARM" code interpreted in this receiving window will reset the time-out T.
On receipt of its ARM code, the acoustic release transmits a CAF pulse received by the remote control unit on
the surface. The elapsed time (T) between the transmission of the ARM code and the reception of CAF
acoustic reply allows the remote control unit to measure the RANGING (D) between the surface and the
acoustic release: D = c ×T / 2 (c = 1500 m/s).
Acoustic release deaf for
a set time (4 s. by
default)
Command
activation
"Customer
code" reception
Window opened for a fixed time T
(20 s by default), during which
reception of a command will be
accepted.
Code reception
If the code is known
=> Command execution Code reception time-out
=> Rejection

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The acoustic commands available under “ARM” command are:
•RELEASE
•RELEASE with PINGER
•PINGER ON
•PINGER OFF
•DIAGNOSTIC
On telecommand reception, the acoustic release transmits a CAF acknowledgement of reception (CAF:
Common Acknowledgement Frequency). The CAF is factory-selected to 8 kHz or 12 kHz as expected by the
user.
After a release operation, a second CAF is transmitted.
The DIAGNOSTIC function gives two information by the acoustic channel:
•Battery voltage
•Acoustic release verticality
On reception of a "Diagnostic" command, the acoustic release transmits two CAF separated by a delay ΔT.
Used in "Time" mode, the TT 301B telecommand unit receives and displays this delay expressed in ms. If the
acoustic release falls in a cone of verticality whose aperture is 45°, the delay is displayed as follows: 5195. If
the equipment is not in this cone of verticality the delay between the two CAF is increased by 10 seconds and it
is displayed as: 5.1.9.5.
In order to deduce the battery voltage (expressed in mV), simply carry out the following calculation:
V_batteries = (ΔT – 3000) ×4.1
E.g.: ΔT = 5195 ms ⇒V_batteries = 9V and the acoustic release is vertical
ΔT = 15195 ms ⇒V_batteries = 9V and the acoustic release is not vertical
Used in « Telemetry » mode, the TT801 remote control unit receives and displays these information.

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Release option by acoustic telecommand
PFR = Pinger Frequency.
In the case of a release with Pinger, the operating duration is set at 3 minutes. Use the PINGER ON command
to transmit PFR for an unlimited duration. Only the PINGER OFF command allows these transmissions to be
stopped.
The following parameters are factory-selected and cannot be changed by the user :
•PFR = 8 kHz or 12 kHz (as expected by the user)
•Pinger rate = 5 seconds.
Motor
rotation
AR
transmission
20 ms
Standard
CAF
acknowledgment CAF execution
Standard release
AR reception
3 sec # 2 sec
Motor
rotation
AR
transmission
20 ms
Standard
CAF
acknowledgment CAF execution
Release with Pinger
AR reception
3 sec
Pinger
transmission
duration
Pinger
rate
# 2 sec
PFR PFR
3 sec

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3. POWER SUPPLY
Internal power supply:
¾3 banks of 6 LR20 Alkaline batteries (Lithium as an option).
¾One 9V motor backup battery (model 6LR61).
¾Batteries assembly without welding with double spring system.
4. AUTONOMY
Note : The percent values read corresponds to the consumed energy compare to energy initially available.
Acoustic standby:
R20 alkaline batteries LSH20 Lithium batteries
At 20°C 6 years and 2 months 9 years and 7 months
At 0°C 5 years 8 years and 4 months
10 000 telecommand interrogations:
R20 alkaline batteries LSH20 Lithium batteries
At 20°C 5.56 % 2.84 %
At 0°C 7.07 % 3.28 %
10 000 Pinger pulse (12 kHz at 5 seconds rate) :
R20 alkaline batteries LSH20 Lithium batteries
At 20°C 6.12 % 3.13 %
At 0°C 7.79 % 3.62 %
100 release operations :
R20 alkaline batteries LSH20 Lithium batteries
At 20°C 1.0 % 0.49 %
At 0°C 1.26 % 0.57 %

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5. ACCESSORIES
In standard, the acoustic release is delivered in a "marine" plywood box with:
•an User Manual,
•a Factory Acceptance Test,
•a key to open and close the equipment.
For the acoustic releases fitted with ‘Time Release’ option, it will be delivered in addition :
•a Graphic User Interface (GUI),
•an User Manual for Graphic User Interface,
•a RS232 serial cable (ref. 9300142)
•a configuration file ‘Conf_def.xxx’ (xxx = serial number of the equipment) to be loaded in the GUI

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6. OPERATION
In this operational section, the pre-deployment, deployment and recovery procedures are described.
6.1 PRE-DEPLOYMENT CHECKING
6.1.1 Preliminary
Before using the acoustic release for an operation, check the equipment configuration.
An acoustic release is identified by its address. A reference sheet (as-built) stipulates the implemented
electronic hardware configuration for each acoustic release complete with the equipment's reference.
It is advisable to test the acoustic release's main functions (interrogation, release, etc.) prior to using it in any
operational situation.
Place the active acoustic head of the remote control unit Transmitter close to the Acoustic Release acoustic
head.
The next sections go through the commands to be tested: RELEASE, PINGER ON, TELEMETRY and
SIMPLE RANGING.
If you use a TT301 remote control unit, please refer to the TT301 user manual.
6.1.2 Sending a Command with the TT801
Step Action
1. Select the TYPE (AR8) of the instrument to be actuated using SCROLL key and confirm the selection
by pressing ENTER key.
2. Select the TRANSMIT TYPE using SCROLL key, according to individual built sheet of the beacon and
confirm the selection by pressing ENTER key.
The type of transmission is normally ARM + CMD and ARM + ARM only when sending a SIMPLE
RANGING command.
3. Type the hexadecimal ARM code, confirm with ENTER, then enter the hexadecimal command code
(2nd byte only) and confirm with ENTER.
4. Indicate the type of command that will be sent to the instrument:
RELEASE, RELEASE + PINGER, PINGER ON, TELEMETRY (DIAGNOSTIC), Other CMD
Selection is made with SCROLL key and confirmation with ENTER key.
The RECEIVE SETTINGS display opens according to the command type.

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Step Action
5. Configure the CAF receiver:
•Choose the receive type (MONO or MFSK) using SCROLL key then press ENTER key to
confirm.
•Choose the frequency (7.5 to 16 kHz) by using SCROLL key or the numerical key for the
MFSK code number (0 to 23) of the CAF. Press ENTER key to confirm.
If you have chosen RELEASE + PINGER or PINGER ON command, you also have to define the pinger
frequency PFR:
•Choose the receive type (MONO or MFSK) by using SCROLL key then press ENTER key to
confirm.
•Choose the frequency (7.5 to 16 kHz) by using the SCROLL key or the numerical key for the
MFSK code number (0 to 23) of the PRF. Press ENTER key to confirm.
6. Select for RANGING the type of the information to display (DISTANCE or Elapsed TIME) using
SCROLL key and press ENTER key to confirm.
Then TT801 opens the TX / RX display for sending in water the command.
7. End of procedure.
6.1.3 Testing the Release Operation
Perform the procedure in 6.1.2 with the RELEASE or RELEASE with PINGER command. Before each acoustic
release operation, check that the release system is totally unobstructed and free of any foreign objects.
•RELEASE command:
After detection of the CAF acknowledgement of the COMMAND RECEIVE message issued by the subsea unit,
the remote control unit displays the message WAITING FOR RELEASE until completion of the operation.
Upon reception of the second CAF (acknowledgement for the release execution), RELEASE OK message is
posted up to confirm success of the operation. Check that the release hook is open.
•RELEASE with PINGER ON command:
The remote control unit displays the pinger rate: after reception of the last CAF acknowledgement that confirms
the command execution. The settings of the pinger receiver are displayed. The PFR receiver updates the
message RECEIVING DATA upon detection of the pinger frequency and returns the pinger rate measured with
the message PINGER Rate: value in second. Check that the release hook is open.
Note
Hook assembly must be rearmed manually. See in 6.2.2

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6.1.4 Testing the Pinger Mode
Perform the procedure in 6.1.2 with the PINGER ON command.
For the PINGER ON command, the remote control unit displays the pinger rate. After reception of the second
CAF acknowledgement (which confirms the execution of the command), the settings of the pinger are
displayed on the remote control unit. The PFR receiver updates the message RECEIVING DATA upon
detection of the pinger frequency and returns the pinger rate measured with the message PINGER Rate: value
in second.
To switch the pinger mode off, repeat the procedure described in 6.1.2 replacing PINGER ON command by
PINGER OFF and Other CMD for the command type. The acoustic device stops the free running transmitting
mode.
6.1.5 Testing the Simple Ranging Operation
Perform the procedure above with the PINGER OFF or “ARM + ARM” command type.
The acoustic device transmits successively two CAF pulses that are received and processed by the remote
control unit. The ranging information is then displayed.
No other operation then transmitting CAF pulses is expected from the Acoustic Actuator.
6.1.6 Testing the Telemetry mode
Perform the procedure above with the TELEMETRY command type.
For TELEMETRY command, the remote control unit displays the tilt (vertical or horizontal) of the AR800 and the
indication of the battery voltage of the beacon. After reception of the second CAF acknowledgement (which
confirms the execution of the command), the message WAITING FOR DIAGNOSTIC is posted up until the
completion of the telemetry operation. The AR800 returns several acoustic pulses (Pulse to Pulse modulation)
to transmit information about voltage of the main battery pack and verticality range. Then the remote control unit
displays the status message that comprises the Tilt of beacon (VERTICAL or HORIZONTAL) and the battery
voltage (Vbat = value in Volt).
Note:
VERTICAL means that the main axis of the beacon housing is vertical, with the upper Acoustic I/O end cap
looking upwards.

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6.2 DEPLOYMENT
Once you have checked the operating state of the acoustic release (see paragraph 6.1) you are ready to set up
the mooring. See on hereafter the typical structure of an immersed mooring.
Mooring using the OCEANO 2500 (AR861B2S) acoustic release
Notes :
•Make sure the transducer is in a clear spot during immersion, in direct line of sight with the sea surface.
•Noisy environment conditions jeopardize the acoustic sensitivity of the acoustic release and the receiving
performances. Make sure that both the AR800 SERIES and the TT801 dunking transducers are deployed
as far as possible from any source of acoustic noises and vibrations.
•The device's normal position must be vertical, transducer to the top.
•Only use special load rings specified by IXSEA.
•B2S body must never be used as fulcrum.
•Pay special attention to the fact that parts of the acoustic release made of UNS32550 Super Duplex
material are isolated from any dissimilar metal. This could lead to major corrosion risks between the
dissimilar metals.

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6.2.1 Attaching the Load to the Acoustic Shackle Assembly
The B2S release hook is generally used when the load is in the axis and the release unit on the side.
Step Action
1. Connect the ring (ref.: 910 3234) to the load or dead weight anchor.
2. Connect the release system to the mooring line (floats and instrumentation).
3. Connect the release system hook to the ring as described in Erreur ! Source du renvoi
introuvable..
4. End of procedure.
6.2.2 Arming the B2S Releasing System
Arming the B2S consists in locking the hook in a closed position. It does not require the use of the
acoustic remote control unit.
Step Action
1. Manually check the mobility of the lever and the hook around their axis.
2. Unscrew and remove the locking screw (ref.: 910 1662) fit on small lever in order to
make the lever (ref.: 910 2922) and hook (ref.: 910 2923A) freed. Using Allen key size 5.
3. Check the position of the dog clutch before proceeding further.
Dog clutch should be in the position shown on the picture hereafter:

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Step Action
If it is not the case, there are two options :
1) Transmit an “ARM+RELEASE” sequence from the remote control unit to activate the
rotation of the dog clutch. Once the rotation is completed, the dog clutch should normally
be in the position as shown on the figure.
2) Turn manually the dog clutch with a screwdriver to make the dog clutch pointing as
shown on the above figure.
Warning:
IF THE DOG CLUTCH IS NOT SET AS DESCRIBED ABOVE,IT MAY BE POSSIBLE TO ARM THE HOOK
BUT LIFTING CAPABILITIES CAN BE JEOPARDIZED.
4 Install the release ring (ref.: 910 3234) in closed position on the hook (ref.: 910 2923A).
5. Rotate the ring / hook assembly around the axles (ref.: 910 1528) in order to engage the
hook on the lever (ref.: 910 2922).

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Step Action
6. Then rock the lever (ref.: 910 2922) in order to lean on the “Dog Clutch” shaft (ref.: 910
1661A).
7. While holding the lever in contact, fit the locking screw (ref.: 910 1662) and screw it up.
This screw locks the lever on the “Dog Clutch” mechanism.

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Step Action
NB: Fit the locking screw with thread lock (neoprene glue BOSTIK 1400).
8. Check, both visually and by pulling action on the hook, that the assembly is properly
locked.
9. End of procedure.