EdgeTech PORT LF-SD Release Transponder User Manual

User Manual for EdgeTech models including: 0010189, 0010189_REV_F, PORT LF-SD Release Transponder, PORT LF-SD, Release Transponder, Transponder

PORT LF-SD

0010189

Mike Mykytyn Microsoft

PORT LF-SD

PORT LFSD User Manual

Resource Center

File Info : application/pdf, 73 Pages, 6.44MB

0010189 REV F

PORT LF-SD
USER HARDWARE MANUAL
0010189_REV_F

6/11/2024

EdgeTech 4 Little Brook Road West Wareham, MA 02576
Tel: (508) 291-0057 Fax: (508) 291-2491 www.EdgeTech.com

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The information, figures, and specifications in this manual are proprietary and are issued in strict confidence on condition that they not be copied, reprinted, or disclosed to a third party, either wholly or in part, without the prior written consent of EdgeTech. Any reproduction of EdgeTech-supplied software or file sharing is strictly prohibited. Copyright © 2018-2024 EdgeTech. All rights reserved.

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ATTENTION READ THIS FIRST!
All personnel involved with installing, operating, or maintaining the equipment described in this manual should read and understand the warnings and cautions provided below.
CAUTION! This equipment contains devices that are extremely sensitive to static electricity. Therefore, extreme care should be taken when handling them. Normal handling precautions involve using anti-static protection materials and grounding straps for personnel.
WARNING! High voltage may be present in all parts of the system. Therefore, use caution when the electronics are removed from their containers for servicing.
CAUTION! Operation with improper line voltage may cause serious damage to the equipment. Always ensure that the proper line voltage is used.
Warnings, Cautions, and Notes
Where applicable, warnings, cautions, and notes are provided in this manual as follows:
WARNING! Identifies a potential hazard that could cause injury or death.
CAUTION! Identifies a potential hazard that could damage equipment or data.
NOTE: Recommendations or general information particular to the material being presented.

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HARDWARE VARIATIONS AND COMPATIBILITY
The PORT LF-SD contains both standard and proprietary hardware. At times, EdgeTech may change the standard components due to their availability or performance improvements. Although the component manufacturers and their models and styles may change from unit to unit, replacement parts will generally be interchangeable.
EdgeTech will make every effort to see that replacement components are interchangeable and use the same software drivers (if applicable). At times, however, direct replacements may not exist. When this happens, EdgeTech will provide the necessary drivers with the replacement part, if applicable.
EdgeTech may also change certain hardware per customer requirements. Therefore, portions of this manual, such as parts lists and test features, are subject to change. These sections should be used for reference only. When changes that affect system operation are made, they will be explicitly noted. Also, some options and features may not be active in the customer's unit at the time of delivery. Upgrades will be made available when these features are implemented.
Contact EDGETECH CUSTOMER SERVICE with any questions relating to compatibility.

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ABOUT THIS DOCUMENT
We, the employees at EdgeTech, would like to thank you for purchasing the PORT LF-SD. At EdgeTech, our policy is to provide high-quality, cost-effective products and support services that meet or exceed your requirements. We also strive to deliver them on time and to look for ways to improve them continuously. We take pride in the products we manufacture and want you to be entirely satisfied with your equipment.

Purpose of this Manual
The purpose of this manual is to provide the user with information on the setup and use of EdgeTech's PORT LF-SD. Although this manual encompasses the latest operational features of the PORT LF-SD, some features may be periodically upgraded. Therefore, the information in this manual is subject to change and should be used for reference only.

Liability
EdgeTech has made every effort to document the PORT LF-SD in this manual wholly and accurately. However, EdgeTech assumes no liability for errors or any damages resulting from using this manual or the equipment it documents. EdgeTech reserves the right to upgrade this equipment's features and make changes to this manual without notice at any time.

Revision History

REVISION DESCRIPTION

Release to Production

Updates

Updated Images and Content

Updated Images and Information

Updates to Drawings

EBACS and General Updates

DATE
N/A N/A 09/2015 01/12/2018 8/29/2018 06/11/2024

APPROVAL
RM RM RM RM RM SS

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WARRANTY STATEMENT
All equipment manufactured by EdgeTech is warranted against defective components and workmanship for a period of one year after shipment. Warranty repair will be done by EdgeTech free of charge. Shipping costs are to be borne by the customer. Malfunction due to improper use is not covered in the warranty, and EdgeTech disclaims any liability for consequential damage resulting from defects in the performance of the equipment. No product is warranted as being fit for a particular purpose, and there is no warranty of merchantability. This warranty applies only if:
i. The items are used solely under the operating conditions and in the manner recommended in the Seller's instruction manual, specifications, or other literature.
ii. The items have not been misused or abused in any manner, nor have repairs been attempted thereon without the approval of EdgeTech Customer Service.
iii. Written notice of the failure within the warranty period is forwarded to the Seller, and the directions received for properly identifying items returned under warranty are followed.
iv. The return notice authorizes the Seller to examine and disassemble returned products to the extent the Seller deems necessary to ascertain the cause for failure.
The warranties expressed herein are exclusive. There are no other warranties, either expressed or implied, beyond those set forth herein, and the Seller does not assume any other obligation or liability in connection with the sale or use of said products. Any product or service repaired under this warranty shall be warranted for the remaining portion of the original warranty period only. Equipment not manufactured by EdgeTech is supported only to the extent of the original manufacturer's warranties.
CAUTION! If your product is a portable topside, never attempt to ship it in its Storm CaseTM alone. Shipping portable topsides without an exterior shipping crate will void the warranty.

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SOFTWARE SERVICE OVERVIEW
EdgeTech provides software services free of charge. This software agreement does not address customerspecified modifications or enhancements. These services may be ordered separately. Furthermore, EdgeTech software upgrades are meant for the sole use of EdgeTech customers. Any reproduction of EdgeTech-supplied software or file sharing is strictly prohibited.
Software Updates and Enhancements
EdgeTech customers can download new software releases with all modifications and enhancements from the EDGETECH WEBSITE. Should major software issues occur, they will be reported directly to the customer. New software releases consist of the following:
· Software enhancements that are not on the price list · Software fixes and changes · Product integration · Documentation updates to online help · Tests for compatibility with other modules
Software patches consist of software that has undergone the following: · Minor software enhancements · Software fixes and changes
EdgeTech customers are entitled to contact EDGETECH CUSTOMER SERVICE by telephone, fax, or e-mail to report a difficulty, discuss a problem, or receive advice on the best way to perform a task. When contacted, EdgeTech Customer Service will do the following:
· Respond within 24 hours via telephone, fax, and e-mail support · Immediately attend to serious problems affecting operations · Attempt to find an immediate workaround

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RETURNED MATERIAL AUTHORIZATION
Prior to returning any equipment to EdgeTech, a Returned Material Authorization (RMA) Number must be obtained from CUSTOMER SERVICE.
RMA Purpose
The RMA Number identifies returned equipment when it arrives at our receiving dock and enables tracking while at our facility. Refer to the RMA number on all documentation and correspondences. All returned materials must be shipped prepaid. Freight collect shipments will not be accepted. All equipment should be adequately insured for shipping, but equipment belonging to EdgeTech must be insured for full value. If there is more than one item per consignment, include a packing with the shipment. An invoice can double as a packing slip only when the contents are clearly numbered and identified on the invoice.
CAUTION! Never attempt to ship a Portable Topside in its Storm CaseTM alone. Although rugged, these cases are not intended to be used as shipping containers, and the delicate internal components could be damaged. Shipping in this manner will void any warranties.
NOTE: All shipping charges shall be the customer's responsibility unless under warranty, as EdgeTech will pay for return shipping.
NOTE: For International Shipments valued over $1000, the following Shipper's oath must be sent with the invoice.
Shipper's Oath:
"I, ______________________________, declare that the articles herein specified are the growth, produce, or manufacture of the United States; that they were exported from the United States from the port of _____________________, on or about _______________; that they are returned without having been advanced in value or improved in condition by any process of manufacture or any other means; and that no drawback, or allowance has been paid or admitted hereof." Signed ______________________________

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CUSTOMER SERVICE
Customer service personnel at EdgeTech are always eager to hear from users of our products. Your feedback is welcome and is a valuable source of information that we use to improve these products continually. Therefore, we encourage you to contact EdgeTech Customer Service to offer any suggestions or to request technical support:

NOTE: Please have your system Model and Serial Number available when contacting Customer Service.

E-mail: Mail:
Telephone: Fax: 24-Hour Emergency Technical Support Line:

service@edgetech.com 4 Little Brook Road West Wareham, MA 02576 (508) 291-0057 (508) 291-2491
(508) 942-8043

For more information, please go to WWW.EDGETECH.COM.

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COMPANY BACKGROUND
EdgeTech (formerly EG&G Marine Instruments) traces its history in Underwater Data Acquisition and Processing back to 1966. EdgeTech has designed, developed, and manufactured products, instruments, and systems -- for the acquisition of underwater data, including marine, estuarine, and coastal applications -- for over 50 years. EdgeTech responds to the needs of the scientific, naval, and offshore communities by providing industryleading equipment -- such as sub-bottom profilers, side scan sonar, acoustic releases, USBL positioning systems, and bathymetric systems -- that have become standards in the industry. EdgeTech consistently anticipates and responds to future needs with an active Research and Development Program. Current efforts are focused on adapting new cutting-edge acoustic technology.

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TABLE OF CONTENTS
ATTENTION READ THIS FIRST! .........................................................................................................iii Warnings, Cautions, and Notes................................................................................................................ iii
HARDWARE VARIATIONS AND COMPATIBILITY..................................................................................iv ABOUT THIS DOCUMENT....................................................................................................................v
Purpose of this Manual ............................................................................................................................. v Liability ...................................................................................................................................................... v Revision History ........................................................................................................................................ v WARRANTY STATEMENT ...................................................................................................................vi SOFTWARE SERVICE OVERVIEW........................................................................................................vii Software Updates and Enhancements.................................................................................................... vii RETURNED MATERIAL AUTHORIZATION .......................................................................................... viii RMA Purpose ......................................................................................................................................... viii CUSTOMER SERVICE..........................................................................................................................ix COMPANY BACKGROUND ..................................................................................................................x TABLE OF CONTENTS.........................................................................................................................xi LIST OF FIGURES.............................................................................................................................. xiv LIST OF TABLES .............................................................................................................................. xvii 1.0 OVERVIEW................................................................................................................................1 1.1 Basic Functionality ........................................................................................................................ 2 2.0 SPECIFICATIONS ........................................................................................................................3 2.1 Mechanical Specifications ............................................................................................................ 3 2.2 Printed Circuit Board (PCB)........................................................................................................... 3 2.3 Acoustic Specifications ................................................................................................................. 4
2.3.1 Command Receiver.................................................................................................................. 4 2.3.2 BACS Command Structure ....................................................................................................... 4 2.3.3 E-BACS Command Structure .................................................................................................... 4 2.3.4 BACS Command Coding ........................................................................................................... 5 2.3.5 Standard Command Functions ................................................................................................ 5 2.3.6 Transponder Specifications ..................................................................................................... 5 2.3.7 Power Supply Specifications .................................................................................................... 6

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2.3.8 Environmental Specifications .................................................................................................. 6 2.4 Mechanical Drawings.................................................................................................................... 6 3.0 Installation .............................................................................................................................11 3.1 Required Equipment................................................................................................................... 11 3.2 Acoustic Considerations ............................................................................................................. 11 3.3 Mechanical Considerations ........................................................................................................ 12 3.4 Bio-Fouling Prevention ............................................................................................................... 12 3.5 Monitoring Tilt With Status Reply .............................................................................................. 12 4.0 Operating Instructions ............................................................................................................13 4.1 Turning the PORT LF-SD on by Connecting the Power ............................................................... 13
4.1.1 Removing the Purge Port Plug ............................................................................................... 13 4.1.2 Removing the Transducer End Cap........................................................................................ 14 4.1.3 Connecting Power.................................................................................................................. 16 4.1.4 Closing the Release ................................................................................................................ 17 4.1.5 Purging the Device and Sealing The Port LF-SD: Leak and Condensation Prevention........... 20 4.2 Arming The Port LF-SD................................................................................................................ 22 4.3 Acoustic Air Testing .................................................................................................................... 24 4.3.1 Test Setup .............................................................................................................................. 24 4.3.2 Test Procedures ..................................................................................................................... 24 4.4 Post Deployment ........................................................................................................................ 25 5.0 Maintenance ..........................................................................................................................26 5.1 PORT LF-SD Disassembly............................................................................................................. 26 5.2 PORT LF-SD Assembly ................................................................................................................. 27 5.3 Battery Replacement .................................................................................................................. 31 5.4 O-Rings........................................................................................................................................ 33 5.4.1 O-Ring Care and Considerations ............................................................................................ 33 5.4.2 Additional O-Rings ................................................................................................................. 34 5.4.3 Servicing the O-Rings ............................................................................................................. 34 5.5 General Cleaning and Inspection................................................................................................ 35 5.5.1 Inspection Particulars ............................................................................................................ 35 5.6 EdgeTech Product Suggestions................................................................................................... 36 A.0 PORT LF-SD Kits and Options..................................................................................................37

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A.1 Spares Kit .................................................................................................................................... 37 A.2 O-Ring Kit .................................................................................................................................... 37 A.3 PORT LF-SD Remote Release Kit Option ..................................................................................... 38 A.4 PORT LF-SD Tandem Kit Option .................................................................................................. 41 A.5 PORT LF-SD Strongback Option .................................................................................................. 44 A.6 PORT LF-SD Pop-Up Option ........................................................................................................ 46
A.6.1 Pop-Up Assembly................................................................................................................... 46 A.6.2 Line Packing Considerations .................................................................................................. 46 A.6.3 Line Packing Procedure.......................................................................................................... 47 A.6.4 Pop-Up Assembly................................................................................................................... 48 A.6.5 Pop-Up Kits ............................................................................................................................ 52 A.6.6 Pop-up Up Mechanical Drawings........................................................................................... 54

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LIST OF FIGURES
Figure 1-1: PORT-LF-SD ................................................................................................................................. 1 Figure 1-2: PORT-LF-SD Side View................................................................................................................. 1 Figure 2-1: PORT-LF PCB Connectors ............................................................................................................ 3 Figure 2-2: Standard Port LF-SD ICD ............................................................................................................. 7 Figure 2-3: PORT-LF-SD Callout Assembly Drawing Page 1 of 3 ................................................................... 8 Figure 2-4: PORT-LF-SD Callout Assembly Drawing Page 2 of 3 ................................................................... 9 Figure 2-5: PORT-LF-SD Callout Assembly Drawing Page 3 of 3................................................................. 10 Figure 3-1: PACS Deck Box .......................................................................................................................... 11 Figure 3-2: 8011M Deck Box ....................................................................................................................... 11 Figure 3-3: Dunking Transducer .................................................................................................................. 11 Figure 4-1: Unscrew the [2] Nylon Screws On Anti-Rotation Block ............................................................ 13 Figure 4-2: Removing Purge Port Plug ........................................................................................................ 14 Figure 4-3: Removing Kynar Rod From the Release.................................................................................... 14 Figure 4-4: Pulling the Transducer End Cap From the Housing .................................................................. 15 Figure 4-5: Sliding the Transducer End Cap and Electronics From The Housing ........................................ 15 Figure 4-6: Battery Connection Location On Port LF-SD Electronics Board................................................ 16 Figure 4-7: Gently Line Up the Connector to the 3-Pins and Press In ........................................................ 16 Figure 4-8: Transducer Cable is Run Through the Electronic Chassis Support Bracket .............................. 17 Figure 4-9: Consider the Grounding Spring When Inserting the Release End Cap ..................................... 18 Figure 4-10: Gently Pushing The Transducer Into the Housing .................................................................. 18 Figure 4-11: Gently Press the Grounding Spring In While Closing.............................................................. 19 Figure 4-12: Location of Bare Aluminum Band Inside Housing .................................................................. 19 Figure 4-13: End Cap Orientation Key and Housing Insert Lined Up .......................................................... 19 Figure 4-14: End Cap Orientation Key Mated into The Housing................................................................. 20 Figure 4-15: Insert Kynar Rod Into Slot ....................................................................................................... 20 Figure 4-16: Kynar Rod Fully Installed ........................................................................................................ 20 Figure 4-17: Purge Port Plug Location On Release End Cap ....................................................................... 20 Figure 4-18: Installing Anti-Rotation Block By Threading [2] Nylon Screws ............................................... 21 Figure 4-19: Unthread the [2] Nylon Screws and Remove Anti-Rotation Block ......................................... 22

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Figure 4-20: Release Shaft and [2] Anodes Locations................................................................................. 23 Figure 4-21: Thread Release Link Onto Release Shaft ................................................................................ 23 Figure 4-22: Replace Anti-Rotation Block By Threading [2] Nylon Screws ................................................. 24 Figure 5-1: Unplug the Transducer Cable from the Electronics Board Connector JP1 ............................... 26 Figure 5-2: Kynar Rod Removal On Transducer End ................................................................................... 27 Figure 5-3: Transducer End Cap Carefully Slid Away from the Release Housing........................................ 27 Figure 5-4: Bare Aluminum Band Inside of Housing ................................................................................... 28 Figure 5-5: Feed the Transducer Cable from the Transducer Side of the Housing to the Release Side..... 29 Figure 5-6: Line the End Cap and Housing Up Using the Key and Guide the Transducer End Cap into the Housing ....................................................................................................................................................... 29 Figure 5-7: Transducer End Cap Orientation Key and Housing Insert, Properly Mated ............................. 30 Figure 5-8: Insert Kynar Rod Into Slot ......................................................................................................... 30 Figure 5-9: Slide In Kynar Rod Until It Emerges from the Slot on the Other Side....................................... 30 Figure 5-10: The Transducer Cable Connected to the JP1 Header Connector ........................................... 30 Figure 5-11: PORT-LF Battery Pack ............................................................................................................. 31 Figure 5-12: Disconnecting Transducer Cable From Electronics Board ...................................................... 32 Figure 5-13: Location of Battery Pack [2] Retainer Brackets and [4] Screws.............................................. 32 Figure 5-14: Battery Wire Locations ........................................................................................................... 32 Figure 5-15: Complete Screw Assembly is [1] Screw, [1] Lock Washer and [1] Pattern Flat Washer......... 33 Figure 5-16: Attach [2] Retainer Brackets by Threading [2] Screw Assemblies Each ................................. 33 Figure 5-17: Disconnecting the Transducer Cable ...................................................................................... 34 Figure 5-18: Release End O-Ring ................................................................................................................. 34 Figure 5-19: Transducer Ring O-Ring .......................................................................................................... 34 Figure 5-20: Cross Section of Round and Backup O-rings........................................................................... 35 Figure 5-21: Port LF Remote Release Kit ICD .............................................................................................. 38 Figure 5-22: Port LF With Remote Release Kit ICD ..................................................................................... 39 Figure 5-23: ASSY Top Port LF Kit with Remote Release ICD ...................................................................... 40 Figure 5-25: PORT-LF-SD Tandem Kit Assembly ICD ................................................................................... 42 Figure 5-26: PORT-LF Strongback Tandem Kit Assembly ICD ..................................................................... 43 Figure 5-27: PORT-LF-SD Strongback Kit ICD .............................................................................................. 45 Figure 5-28: Line Attached to the Inside and Outside of the Bucket.......................................................... 47

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Figure 5-29: Attach the End of the Line to the Chain ................................................................................. 47 Figure 5-30: An Example of Flaked Line into the Canister .......................................................................... 48 Figure 5-31: The PORT-LF-SD Transducer with Clamp ................................................................................ 49 Figure 5-32: Installed PORT-LF-SD to Pop-Up ............................................................................................. 49 Figure 5-33: Inserting Release into the Top Cup from Above..................................................................... 50 Figure 5-34: Installing Anti-Slip Ring ........................................................................................................... 50 Figure 5-35: Bolting Release to Pop-Up Bottom Cup.................................................................................. 51 Figure 5-36: PORT LF-SD Flotation Pop-Up Assembly Drawing - 0015784 ................................................. 54 Figure 5-37: PORT LF-SD Pop-Up Canister 200M Assembly 0010838...................................................... 55 Figure 5-38: PORT LF-SD PORT LF-SD Pop-Up Canister 200M Drawing - 0015749..................................... 56

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LIST OF TABLES
Table 2-1: Standard Port-LF-SD Mechanical Specifications .......................................................................... 3 Table 2-2: Command Receiver Acoustic Specifications ................................................................................ 4 Table 2-3: Allowed BACS Tone Pair Breakdown ........................................................................................... 5 Table 2-4: Standard Command Functions..................................................................................................... 5 Table 2-5: Transponder Specifications.......................................................................................................... 5 Table 2-6: Power Specifications .................................................................................................................... 6 Table 2-7: Environmental Specifications....................................................................................................... 6 Table 3-1: Status Reply Meanings ............................................................................................................... 12 Table 5-1: Port LF-SD Spares Kit.................................................................................................................. 37 Table 5-2: Port LF-SD O-Ring Kit.................................................................................................................. 37 Table 5-3: PORT LF-SD Tandem Kit ............................................................................................................. 41 Table 5-4: PORT LF-SD Strongback Kit ........................................................................................................ 44 Table 5-5: PORT LF-SF Pop-Up Canister 200-Meter Kit............................................................................... 52 Table 5-6: PORT LF-SF Pop-Up Canister 400 Meter Kit ............................................................................... 53

1.0 OVERVIEW

This manual describes the EdgeTech Small Diameter Low-Frequency PushOff Acoustic Release and Transponder (PORT LF-SD). This model is a lightweight, robust, and easily deployable instrument. It can function both as an acoustic release and/or transponder at depths up to 3500 meters and with release loads up to 350 kilograms. All that is required for use is a compatible deck box and dunking transducer to send commands and receive information.

Figure 1-1: PORT-LF-SD

The PORT LF-SD is very versatile. It is designed for use as an instrument location and recovery system on oceanographic moorings and platforms. Additionally, the precision, high-output power transponder feature makes this instrument ideal for use in Long Baseline (LBL) Positioning and Navigation Systems. There are options and kits to customize the PORT LF-SD further to fit your needs. These include a Remote Release Option Kit, Tandem Kit, and Strongback Kit.

Figure 1-2: PORT-LF-SD Side View
PORT LF-SD models built from 2024 onward utilize EdgeTech's Extended Binary Acoustic Command System (EBACS), and earlier models use the legacy Binary Acoustic Command Structure (BACS). EBACS coding structure provides 131,000 possible secure command codes, and BACS coding structure provides 12,000 possible secure command codes. Both command systems are field-proven and widely used in many maritime environments. EdgeTech 8011M and PACS deck boxes are compatible with both BACS and EBACS command systems. Older deck boxes are not compatible with EBACS.
Each PORT LF-SD release is factory programmed with its own unique command set, including ENABLE, DISABLE, and RELEASE commands. Whenever the instrument receives a DISABLE or ENABLE command, it responds with a status reply message that indicates the orientation of the instrument (tilted or not tilted).

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1.1 Basic Functionality
The transponder function can be turned ON or OFF with the ENABLE and DISABLE commands. An Auto Disable function is available to disable the transponder function after 512 pings, preventing the batteries from running down if accidentally enabled. The ping counter resets to zero each time it is enabled. When disabled, the transponder will not reply when interrogated. This ensures the unit will not interfere with nearby instruments and that no battery energy will be wasted replying to spurious noise sources during the deployment. The ENABLE and DISABLE transponder commands do not affect the RELEASE command.
The RELEASE command causes the instrument's threaded release shaft to rotate and push off a threaded release link. While releasing, the PORT LF-SD will ping once for every rotation of the release shaft. This confirms that the shaft is turning and the release link is being pushed off. Once the threaded link is completely pushed out, the instrument is free. The RELEASE command does not affect the ENABLE and DISABLE commands.

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2.0 SPECIFICATIONS

Specifications for the PORT LF-SD are provided in the subsections that follow.
2.1 Mechanical Specifications

SPECIFICATION
Depth Rating Maximum Release Threshold Maximum Static Load Overall Length Main Diameter Weight in Water Weight in Air Housing Material Other Materials Finish Release Type

VALUE
3,500 m (11,480 ft) 250 kg (550 lb) 750 kg (1,650 lb) 71.8 cm (28.3 in) 10.6 cm (4.2 in) 3 kg (6.7 lb) 7 kg (15.4 lb) Type 6061 Aluminum Delrin, Nylon, Kynar, Ultem, Neoprene 316SS Hard-anodized and Epoxy-painted (Yellow) Mechanical (motor-driven push-off)

Table 2-1: Standard Port-LF-SD Mechanical Specifications

2.2 Printed Circuit Board (PCB)

The PCB connectors on the PORT-LF electronic circuit board are shown below (FIGURE 2-1).

Transducer Connection

Motor Connection

Figure 2-1: PORT-LF PCB Connectors

Battery Connection

2.3 Acoustic Specifications

2.3.1 Command Receiver

SPECIFICATION
Sensitivity Receiver Type Pulse Width Pulse Period Total Command Time Total Lock-Out Time Commands Per Tone Pair

VALUE
78 dB re 1 µPa Multi-stage band pass with hard-limited output (2,000 Hz / 300 Hz Bandwidths) 22 ms 228 ms 14.56 seconds 14 s re beginning 131,000

Table 2-2: Command Receiver Acoustic Specifications
2.3.2 BACS Command Structure
The BACS command structure consists of two 8-bit words separated by 5-sec intervals. Each bit-encoded word is comprised of 8 bits from a 16-bit command. The 16-bit command is a 15-bit, 11-block cyclic code with an overall parity bit appended to the end to form a 16-bit code with a minimum Hamming distance of 4 bits. Additionally, two transitions are required within each word, and no repetitions of words are allowed per command.

2.3.3 E-BACS Command Structure
The Extended BACS (EBACS) command structure supported by this product provides for many more commands and more variance for users than standard BACS. Extended BACS commands are three bytes long instead of two bytes in the original BACS command structure. The original BACS commands are composed of 11 data bits and 5 parity bits, yielding roughly 2000 commands per tone pair. On the other hand, the extended BACS commands are composed of 17 data bits and 7 parity bits, yielding roughly 131,000 commands per tone pair. Both legacy and extended BACS commands maintain a minimum Hamming distance of four bits.
BACS and Extended BACS have some differences that make them incompatible. Both the bit and byte timing in the extended command structure have been modified from the timing used in the legacy BACS command structure. This modification is necessary to prevent existing underwater units from erroneously decoding any combination of the first and second bytes or second and third bytes of the extended commands as a valid two-byte command.

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2.3.4 BACS Command Coding
TONE PAIR NUMBER
1 2 3 4 5 6

"0" (VALUE IN kHz)
9.5 9.5 9.5 9.9 9.9 10.3

"1" (VALUE IN kHz)
9.9 10.3 10.7 10.3 10.7 10.7

Table 2-3: Allowed BACS Tone Pair Breakdown
2.3.5 Standard Command Functions

SPECIFICATION ENABLE DISABLE RELEASE

VALUE Enable Transponder Disable Transponder Activate mechanical release

Table 2-4: Standard Command Functions
2.3.6 Transponder Specifications

SPECIFICATION
Sensitivity RCV Detection Jitter Interrogate Frequency Post-Filter Bandwidth Minimum Interrogate Pulse Width Reply Frequency Reply Pulse Width Reply Source Level Turnaround Time Lockout Time

VALUE
80 dB re 1 µPa < 0.1 ms 9 or 11 kHz standard (others are optional) 330 Hz 5 ms 12 kHz standard (other frequencies available) 10 ms 192 dB re 1 µPa @ 1 m 12.5 ms 1 second

Table 2-5: Transponder Specifications

2.3.7 Power Supply Specifications
The PORT-LF-SD uses a welded alkaline Battery Pack as a power supply. Specifications for this battery pack are shown in the following table:

SPECIFICATION
Main Supply Quiescent Current Drain Design Life (@ 0° C) Design Life (@ 0° C)

VALUE
5V regulated 330 µA 1.25 years 10,000 replies @ 10 ms

Table 2-6: Power Specifications
2.3.8 Environmental Specifications

SPECIFICATION
Operating Storage (Batteries Removed)

VALUE
-10° C to + 40° C (14° F to 104° F) --20° C to + 60° C (-4° F to 140° C)

Table 2-7: Environmental Specifications

2.4 Mechanical Drawings
The following mechanical drawings depict the standard PORT-LF-SD.

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7 Figure 2-2: Standard Port LF-SD ICD

8 Figure 2-3: PORT-LF-SD Callout Assembly Drawing Page 1 of 3

9 Figure 2-4: PORT-LF-SD Callout Assembly Drawing Page 2 of 3

10 Figure 2-5: PORT-LF-SD Callout Assembly Drawing Page 3 of 3

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3.0 INSTALLATION
This section contains information about the basic setup of EdgeTech's PORT-LF-SD, including important details concerning the unit's orientation on a mooring structure.
NOTE: The transponder will operate in any orientation. However, specifics of the intended deployment will mandate unique installation concerns.
3.1 Required Equipment
The Port LF-SD requires a deck box and dunking transducer to send and receive commands. Compatible EdgeTech deck boxes are the 8011M and PACS, with several different dunking transducer options. EdgeTech offers both for purchase separately from the PORT LF-SD. All are light, durable, water-resistant, and easy to use. Deck box product manuals are found on the EDGETECH WEBSITE.

Figure 3-1: PACS Deck Box

Figure 3-2: 8011M Deck Box

Figure 3-3: Dunking Transducer

NOTE: The 8011M and PACS LF deck box firmware must be up to date to send these commands. 8011M firmware should be 1.701 or later, and the PACS LF should be 2.01 or later. Contact EdgeTech CUSTOMER SERVICE for details on updating the firmware on your deck box.
3.2 Acoustic Considerations
Efforts should be made to ensure a clear acoustic path between the PORT LF-SD transducer and the source (typically a dunking transducer from a deck Unit). Structural elements of a mooring system, which have significantly different acoustic impedance than seawater, will cause absorption or reflection of acoustic signals that will degrade the unit's operation. The top causes of unit degradation include syntactic foam, plastic floats, and floatation, including glass spheres. Any float placed physically close to the transducer can create a blind area in the transducer's beam pattern.

3.3 Mechanical Considerations
The release mechanism is designed for in-line loads, and side loading will severely degrade performance. The release load is held through the top pad eye, housing, and release link. There are isolation shoulder washers on the top pad eye to prevent electrical contact with the mooring. The unit must be secured to the structure in some installations (such as a trawl-resistant bottom mooring).
The release link is important and treated as a disposable item. It is used to electrically isolate the release from the rest of the mooring. It is important to verify that the release link is not obstructed in its motion, which could prevent it from disengaging. The release link is fabricated from Ultem, a high-strength plastic. An arbitrary choice of an alternate release link could result in jamming, galvanic corrosion, or mooring failure due to insufficient strength.

3.4 Bio-Fouling Prevention
Anti-fouling paint can prevent bio-fouling on the housing and other external parts. Do not use anything that will react with aluminum. Tin-based paints may be used. NEVER USE Copper-based paints.
Grease the threaded release shaft with silicone grease (only!) when instruments are deployed for long periods. This will help protect them and reduce wear. EdgeTech recommends using Novagard G624.
3.5 Monitoring Tilt With Status Reply
The PORT LF-SD is equipped with sensors that monitor the system's tilted or not tilted orientation and release shaft rotation. This information allows the unit to send a coded status reply based on the instrument's orientation and to emit one ping each time the release shaft completes a rotation. The tilt status is useful for ascertaining whether the mooring or platform has been deployed and/or has landed as planned. At the end of a deployment, this information helps determine whether forces such as strong currents or trawl activity have affected the mooring or platform. The status reply indicates one of two states:

· "upright (within 45° of upright)" · "tilted (more than 45° from upright)"
After a(n) DISABLE or ENABLE command has been received, the Unit transmits a series of pings encoded as follows:

PATTERN 15 pings at 2-second intervals
7 pings at 2-second intervals

STATUS Upright
Tilted

Table 3-1: Status Reply Meanings
The tilt sensor is a 45° mechanical switch mounted on the release circuit board assembly in the standard instrument configuration. The unit is defined as "not tilted" with the release mechanism down. Optical tilt switches are available for applications requiring a narrower maximum allowable angle of tilt. The switch can also be installed at different angles to change the standard orientation.

PORT LF-SD

0010189_REV_F

13
4.0 OPERATING INSTRUCTIONS
The Port LF-SD is ready for use once power is connected. It is simple to operate, requiring only a deck box and a dunking transducer to communicate with it. Instructions for opening the Port LF-SD, connecting power, closing it, and sealing it are below. Deck Box manuals are found on the EDGETECH WEBSITE.
4.1 Turning the PORT LF-SD on by Connecting the Power
The battery pack comes delivered disconnected from the internal electronics unless otherwise specified by the customer. For first use, the housing must be opened so the battery pack cable can be plugged into the JP3 header connector on the electronic board to provide power. The unit must then be closed and the housing purged.
WARNING! If the underwater unit has been deployed, internal pressurization is possible. Exercise extreme caution when opening the instrument!
4.1.1 Removing the Purge Port Plug
The Purge Port Plug keeps the unit sealed. If it is not removed first, the unit will not open. 1. Remove the anti-rotation block (black Delrin block that keeps the release link from turning) from the release end of the instrument by unscrewing the two nylon screws that hold it in place, as shown in FIGURE 4-1.
[2] Nylon Screws
Figure 4-1: Unscrew the [2] Nylon Screws On Anti-Rotation Block 2. The purge port plug will be visible once the anti-rotation block has been removed. Pull the purge
port plug from the end cap, as shown in FIGURE 4-2.

14 Purge Port Plug

Figure 4-2: Removing Purge Port Plug
4.1.2 Removing the Transducer End Cap
3. Remove the Kynar retaining rod (white plastic rod) from the transducer end by gripping the end of the rod with pliers or your fingers and pulling it from the release (FIGURE 4-3).
Kynar Rod

Figure 4-3: Removing Kynar Rod From the Release

PORT LF-SD

0010189_REV_F

15 4. Pull the transducer end cap free from the housing, as shown in FIGURE 4-4. You may need to work
it side-to-side to get it started, but the transducer end should slide out easily once the initial resistance is overcome, exposing the electronics board and cabling.
WARNING! Separate the transducer end from the housing by gently pulling them apart. The main electronics and battery pack assembly are connected to the transducer end cap. Carefully slide the assembly out enough to plug the connector from the battery pack into the electronics board (connector JP3) if you are turning the system on. Be careful not to scratch the housing when pulling the assembly from the tube.
Figure 4-4: Pulling the Transducer End Cap From the Housing
Figure 4-5: Sliding the Transducer End Cap and Electronics From The Housing

16
4.1.3 Connecting Power
CAUTION: EdgeTech suggests using a grounded wrist strap to protect the electronics board from static electricity when handling it. The electronics board assembly and battery pack are mounted to an aluminum plate attached to the release end cap. A cable with a connector is used to connect the battery pack to the electronics board. 1. Plug the 3-pin battery connector into the header JP3 on the electronics board by carefully lining
the connector up with the corresponding pins and pressing firmly.
Battery Connection
Figure 4-6: Battery Connection Location On Port LF-SD Electronics Board

Figure 4-7: Gently Line Up the Connector to the 3-Pins and Press In

PORT LF-SD

0010189_REV_F

17
4.1.4 Closing the Release
Closing the release end includes carefully sliding the electronics board back into the release and replacing the Kynar rod. To Close the Release End:
CAUTION: Great care must be taken when closing the release end so as not to pinch the wiring between the cap and the housing. The transducer cable is run through the center of the electronic chassis support bracket.
Electronic Chassis Support Bracket
Transducer Cable
Figure 4-8: Transducer Cable is Run Through the Electronic Chassis Support Bracket CAUTION: Ensure the grounding spring is inside the release when closed. Be sure not to scratch the housing threading with it.

18
Grounding Spring
Figure 4-9: Consider the Grounding Spring When Inserting the Release End Cap 5. Gently guide the electronics assembly back into the housing.

Figure 4-10: Gently Pushing The Transducer Into the Housing
6. Press the grounding spring in while guiding the end cap further in. The grounding spring must be inside the housing when the release is closed and touching the bare aluminum band (FIGURE 4-12 and FIGURE 5-4.

PORT LF-SD

0010189_REV_F

19
Figure 4-11: Gently Press the Grounding Spring In While Closing Bare Aluminum Band
Figure 4-12: Location of Bare Aluminum Band Inside Housing 3. As you gently but firmly push the endcap into the housing, ensure that the end cap orientation
key matches the housing's insert. This ensures proper alignment, as shown in FIGURE 4-14. End Cap Orientation Key Lined Up With The Housing Insert
Figure 4-13: End Cap Orientation Key and Housing Insert Lined Up

20
End Cap Orientation Key and Housing Insert Properly Mated
Figure 4-14: End Cap Orientation Key Mated into The Housing Replacing The Kynar Rod:
4. While holding the release end cap in place, insert the Kynar retaining rod flat into the slot and slide in until it emerges from the slot.

Figure 4-15: Insert Kynar Rod Into Slot

Figure 4-16: Kynar Rod Fully Installed

4.1.5 Purging the Device and Sealing The Port LF-SD: Leak and Condensation Prevention

The Port LF-SD must have its atmosphere purged and properly sealed to detect leaks and prevent condensation. The Port LF-SD has a 5/16-inch diameter purging port on the bottom (release end) end cap that gives access. The suggested equipment is a vacuum pump, dry nitrogen gas cylinder, and compound pressure/vacuum gauge, all arranged on a manifold setup.

Purge Port Plug

The recommended procedure for preparation of the Port LF-SD atmosphere is as follows.

Figure 4-17: Purge Port Plug Location On Release End Cap

PORT LF-SD

0010189_REV_F

21
CAUTION: When purging the instrument, be careful not to draw more than a -5 PSIG vacuum. Exceeding this figure can damage the batteries and electronic components, resulting in instrument failure. If a purging setup is unavailable, place a desiccant pack inside the housing to help reduce moisture.
1. Verify that all other (other than the purge port) O-ring seals have been cleaned, lubricated, and assembled.
2. Prepare the purge port plug for installation by cleaning and greasing it. The plug must be ready for immediate insertion.
3. Insert a purge port adaptor and draw a -3 PSIG vacuum; do not exceed -5 PSIG. 4. Close the manifold valve to the instrument and allow the instrument to sit for 15 minutes. Check
the gauge afterward and verify that the vacuum did not change. This step is done to detect gross O-ring problems (either cut or missing). 5. Open the valve to the instruments purge port and: · Backfill the housing with dry nitrogen gas; do not exceed +5 PSIG. · Draw a -3 PSIG vacuum on the instrument; do not exceed -5 PSIG. · In humid environments, you should repeat this process up to four times. · After drawing the final vacuum in this process, quickly insert the purging plug before the -3
PSIG vacuum is lost. 6. Secure the purge plug by installing the anti-rotation block with [2] nylon screws.
Figure 4-18: Installing Anti-Rotation Block By Threading [2] Nylon Screws 7. At this point, it is good practice to perform an air acoustic test of the system by running through
the command set for the PORT-LF. Refer to this manual's ACOUSTIC AIR TESTING section for detailed test instructions.

22
4.2 Arming The Port LF-SD
The release mechanism is armed by installing a release link. Items required for arming:
· One (1) Release Link · Silicone grease · Phillips screwdriver (#1 Phillips preferred) To Arm The Instrument: 1. Remove the anti-rotation block from the release end of the instrument (black Delrin block that
keeps the release link from turning) by unscrewing the two nylon screws that hold it in place.

[2] Nylon Screws

Figure 4-19: Unthread the [2] Nylon Screws and Remove Anti-Rotation Block 2. Inspect the release shaft (FIGURE 4-20), ensuring it is free of debris and not damaged.

PORT LF-SD

0010189_REV_F

23 Release Shaft
[2] Anodes Figure 4-20: Release Shaft and [2] Anodes Locations 3. Grease the threads on the shaft and inside the link with silicone grease. 4. Thread the release link onto the release shaft until it bottoms out, then unscrew it ¼ turn.
Figure 4-21: Thread Release Link Onto Release Shaft

24 5. Replace the anti-rotation block using two nylon screws.

Figure 4-22: Replace Anti-Rotation Block By Threading [2] Nylon Screws
4.3 Acoustic Air Testing
This section describes the acoustic air testing to ensure the proper function of the PORT LF-SD before deployment.
4.3.1 Test Setup
The specific acoustic impedance of air is quite different from that of seawater, which renders the transducer a far less efficient receiver when out of water. For this reason, placing the source (deck unit transducer or speaker) within a meter or two of the PORT LF-SD transducer is necessary, with no obstructions to the acoustic path. Depending on the environment, some experimentation may be necessary to find a suitable location.
4.3.2 Test Procedures
The proper six or ten digit commands unique to the Unit undergoing testing are required for the following tests. These are found in the card shipped with your unit. If it appears that commands are not getting through, verify that the serial number of the unit being tested matches that on the sheet of command codes.
1. Using the deck box, interrogate to ascertain whether the PORT LF-SD is enabled or disabled.

PORT LF-SD

0010189_REV_F

25
· If the Unit has just been turned on, it will be enabled. · Unless otherwise specified, the PORT LF-SD will be shipped from EdgeTech, with the
interrogate frequency tuned to 11 kHz and the reply frequency set to 12 kHz.
2. Using the deck box, send the ENABLE command. The instrument should reply with a series of pings based on the orientation (tilt) of the PORT LF-SD.
3. Next, send the RELEASE command.
· The shaft should rotate through seven rotations and send 1 ping for each complete rotation. During a successful release cycle, the system will transmit 7 pings.
· The system does not send a status for the RELEASE command. If the shaft fails to turn 7 times or the cycle is somehow interrupted, the system will send the standard status message.
4. Interrogate the instrument using the deck box, set it at the appropriate interrogate frequency, and tune it to the proper reply frequency.
· It is unlikely that the deck box will display a valid range because of the proximity of the two transducers. Still, you should be able to verify that the instrument transmits a reply pulse by listening to the alarm on the front panel of the deck Unit.
5. Next, send the DISABLE command. The instrument should reply with the appropriate series of pings to indicate tilt status.
6. Range on the instrument again with the deck box. This time, the unit should not transmit a reply pulse.
7. It is a good practice to finish by sending the ENABLE command so the instrument will reply to range interrogations during deployment. If the PORT-LF is being shipped or stored, it should be disabled to conserve battery life.
The PORT LF-SD should also be disabled while deployed to conserve battery life. If the system is left enabled and it pings 512 times, it will disable itself to save battery life. Simply send the ENABLE command to use it again.
4.4 Post Deployment
After recovery, the unit should be cleaned and rinsed with fresh water to avoid salt buildup and deterioration of mechanical parts.
A visual inspection of the Housing and release mechanism should be performed to detect any signs of damage, excessive wear, corrosion, etc.
If the PORT LF-SD will not be used again soon, the unit should be turned off by disconnecting the batteries to preserve battery life.
If the unit is to be stored for an extended period of time, the batteries should be removed.

26
5.0 MAINTENANCE
The PORT LF-SD is a durable instrument that requires minimal maintenance. Regular maintenance tasks should include pre-deployment preparations and checks and post-deployment cleaning. Larger Important but less frequent tasks include battery replacement, O-ring care and maintenance, general cleaning, inspection, and lubrication of operational elements. Instructions for all are provided below, along with complete disassembly and reassembly instructions.
5.1 PORT LF-SD Disassembly
Should the need arise for service or parts replacement, the following instructions detail the complete unit disassembly. Suggested tools: Pliers, Phillips Screwdriver Instructions:
WARNING! If the underwater unit has been deployed, internal pressurization is possible. Exercise extreme caution when opening the instrument! CAUTION! Whenever disassembling the PORT LF-SD, the release end should ALWAYS be opened or removed first. The transducer cable connects the transducer end to the release end via the electronics board. Therefore, the release end MUST be opened to unplug the transducer cable before the transducer end can be safely removed from the housing. CAUTION: EdgeTech suggests using a grounded wrist strap to protect the electronics board from static electricity when handling it.
1. Remove the Purge Port Plug, as described in manual section 4.1.1 REMOVING THE PURGE PORT PLUG. 2. Remove the Release End, as described in manual section 4.1.2 REMOVING THE RELEASE END CAP. 3. Unplug the Transducer Cable (JP1) from its header on the Circuit Board. This allows end cap
removal.

Figure 5-1: Unplug the Transducer Cable from the Electronics Board Connector JP1

PORT LF-SD

0010189_REV_F

27 4. Remove the transducer end cap. The procedure is similar to removing the release end cap. The
Kynar rod should be removed, and the transducer carefully slid away from the release housing.
Figure 5-2: Kynar Rod Removal On Transducer End
Figure 5-3: Transducer End Cap Carefully Slid Away from the Release Housing 5. The unit is now completely disassembled. Any maintenance or part inspection can now be
completed. Faulty, questionable, or worn parts should always be replaced.
5.2 PORT LF-SD Assembly
The following instructions detail the complete assembly of the PORT LF-SD.

28
Suggested tools: Pliers, Phillips Screwdriver
CAUTION! The transducer end should be put back into the housing first to ensure no damage to cables and internal components occurs.
CAUTION! The release end MUST be inserted into the housing section with the bare aluminum ring to ground the grounding spring. Housing Orientation: A removed board should be inserted at the end of the housing with the bare aluminum band inside. The aluminum band is normally located in the housing opposite the serial number. FIGURE 5-4 shows the bare aluminum opening of the housing, where the release end must be inserted.
Bare Aluminum Band

Figure 5-4: Bare Aluminum Band Inside of Housing
1. Feed the transducer cable through the end of the housing without the aluminum band, as shown in FIGURE 5-5, ensuring it comes out on the opposite end.

PORT LF-SD

0010189_REV_F

29
Figure 5-5: Feed the Transducer Cable from the Transducer Side of the Housing to the Release Side 2. Gently but firmly slide the transducer end cap into the housing while aligning the end cap's
orientation key with the housing's matching insert (FIGURE 5-6). Take care not to damage the inside of the housing or O-ring sealing surfaces. FIGURE 5-7 depicts a transducer end cap orientation key and housing insert that are properly mated.
End Cap Orientation Key Lined Up With The Housing Insert
Figure 5-6: Line the End Cap and Housing Up Using the Key and Guide the Transducer End Cap into the Housing

30
End Cap Orientation Key and Housing Insert Properly Mated
Figure 5-7: Transducer End Cap Orientation Key and Housing Insert, Properly Mated 3. While holding the transducer end cap in place, insert the Kynar retaining rod flat into the slot and
slide in until it emerges from the slot on the other side.

Figure 5-8: Insert Kynar Rod Into Slot

Figure 5-9: Slide In Kynar Rod Until It Emerges from the Slot on the Other Side

4. Before reinserting the release end cap, plug the Transducer Cable (JP1) back into its header on the circuit board, as shown in FIGURE 5-10.

CAUTION: EdgeTech suggests using a grounded wrist strap to protect the electronics board from static electricity when handling it.

Figure 5-10: The Transducer Cable Connected to the JP1 Header Connector

PORT LF-SD

0010189_REV_F

31
5. Close the release end as instructed in section 4.1.4 CLOSING THE RELEASE of this manual. 6. Purge and seal the PORT-LF as described in section 4.1.5 PURGING THE DEVICE AND SEALING THE PORT
LF-SD: LEAK AND CONDENSATION PREVENTION of this manual.
5.3 Battery Replacement
The Port LF-SD uses a welded battery pack of standard "AA" alkaline batteries. The battery pack is located on the back of the electronics assembly, so the PORT LF-SD must be dissembled, and the electronics chassis must be pulled out of the housing to access it and then reassembled when complete.
Battery Pack
Figure 5-11: PORT-LF Battery Pack
WARNING! If the underwater unit has been deployed, internal pressurization is possible. Exercise extreme caution when opening the instrument! CAUTION! The PORT LF-SD battery pack is on the underside of the electronics assembly. To replace the battery, the electronics board must be flipped upside down. This is safe. No components will touch the table if properly handled. Battery replacements should always be done on a hard surface, such as a table or workbench, to prevent damage to all components. CAUTION: EdgeTech suggests using a grounded wrist strap to protect the electronics board from static electricity when handling it. CAUTION! When replacing the battery, take special care when installing the battery connection cables to avoid pinching them with the battery pack retaining brackets during reassembly.
Instructions: 1. Open the instrument using the instructions in this manual's 5.1 PORT LF-SD Disassembly section. · Ensure that the transducer cable is disconnected. · Slowly and carefully remove the electronics chassis from the housing and flip it so the battery side can be worked on.

Figure 5-12: Disconnecting Transducer Cable From Electronics Board
2. The battery pack is secured to the chassis by [2] retainer brackets attached to the chassis with [2] screw assemblies each. Unthread the [4] screw assemblies to detach the [2] retainer brackets securing the battery pack.

Retainer Bracket [2]
Screw Assemblies

[2] Retainer Brackets

Retainer Bracket [2]
Screw Assemblies

Figure 5-13: Location of Battery Pack [2] Retainer Brackets and [4] Screws
3. Before removing the battery pack, note the orientation of the wires, as shown in FIGURE 5-14. These wires MUST be inserted as seen to avoid being pinched by the retainer brackets, which could result in power failure.

PORT LF-SD

Figure 5-14: Battery Wire Locations 0010189_REV_F

33
4. Disconnect the power cable from the board, remove the old battery pack, and properly dispose of it.
5. Install the new battery pack on the chassis and reinstall the [2] retainer brackets with [2] screw assemblies each to the electronics chassis. Make sure to use the lock washers and pattern flat washers included with each screw assembly. Do not pinch the power cables with the retainer brackets.

Screw

Lock Washer
Pattern Flat Washer

Figure 5-15: Complete Screw Assembly is [1] Screw, [1] Lock Washer and [1] Pattern Flat
Washer

Figure 5-16: Attach [2] Retainer Brackets by Threading [2] Screw Assemblies Each

6. Reassemble the PORT LF-SD using the instructions in this manual's 5.2 PORT LF-SD Assembly section.

5.4 O-Rings

5.4.1 O-Ring Care and Considerations
PORT LF-SD end cap assemblies use O-rings to provide watertight integrity to the electronics housing. Under normal usage, with proper care and lubrication, the O-ring should provide several years of usage. However, like the batteries, the O-ring is an inexpensive component, which is critical to the successful operation of the entire system. Inspecting the O-rings and sealing surfaces before and after each deployment is essential. Depending on the frequency of use, periodically replacing the O-rings is a good practice. Replacement O-rings are available in the PORT LF-SD O-RING KIT and SPARES KIT.
Prepare the sealing surfaces for assembly by cleaning them with a lint-free towel or swab moistened (if needed) with alcohol. Inspect for scratches or nicks that could impair the O-ring's ability to provide a seal. Apply a light coat of O-ring lubricant (EdgeTech recommends Parker's Super O-lube; be sure to use only silicone grease) to the housing and O-ring to facilitate insertion of the end cap. Make sure the lubricant is compatible with Nitrile rubber. Inspect the O-ring for damage, such as tears, dimples, or other defects in the rubber. Replace any O-ring that is questionable or old. Lightly coat the O-ring with lubricant. Protect O-rings when stretching them over large diameters.

34
5.4.2 Additional O-Rings
There are additional O-rings that provide watertight integrity to the housing. These are located on the purge port and release shaft. Check and replace these O-rings periodically as well.
5.4.3 Servicing the O-Rings
1. Remove the purge port plug using the instructions in this manual's 4.1.1 REMOVING THE PURGE PORT PLUG section.
2. Remove the release end cap using the instructions in this manual's 4.1.2 REMOVING THE TRANSDUCER END CAP section. This gives you access to service the O-rings.
3. When you open the release end, slide the electronics assembly out just enough to disconnect the transducer cable from (JP1). Once disconnected, the transducer end cap should be able to be slid out, giving you access to service the O-rings.

Figure 5-17: Disconnecting the Transducer Cable
4. Clean, Inspect, and lightly grease the O-rings. EdgeTech recommends the use of Parker's Super O-lube silicone compound grease.

O-Rings

Figure 5-18: Release End O-Ring

Figure 5-19: Transducer Ring O-Ring

PORT LF-SD

0010189_REV_F

35
5.5 General Cleaning and Inspection
Whenever the unit has been recovered from a deployment, the unit should be cleaned and rinsed with fresh water to avoid salt buildup and deterioration of mechanical parts. A visual check of the housing and release mechanism should be performed to detect any signs of damage, excessive wear, corrosion, etc.
5.5.1 Inspection Particulars
· Check the condition of the threaded release shaft, particularly the area of contact with the release link.
· Check for wear, corrosion, or distortion of the top pad eye (lifting eye). · Check for corrosion of the purge plug. · Check and, if needed, replace all O-rings.
o Each end cap has two O-rings: a rounded O-ring and a flat back-up O-ring. The inner Oring is the flat backup O-ring, and the curved surface should face the outer round O-ring and be toward the endcap. Both O-rings must be in the correct position and adequately lubricated to ensure watertight integrity.
Figure 5-20: Cross Section of Round and Backup O-rings · Check and replace, if needed, the two anodes. · Check the housing for signs of corrosion or damage to the hard coat.
o If there is damage to the paint and/or hard coat on the outside of the release, use epoxybased paint to seal the surface.

36
5.6 EdgeTech Product Suggestions
Kynar Retention Rods: EdgeTech recommends protecting the Kynar retention rods' glands from sediment accumulation before deployment. Field trials show these glands can become tightly packed with fine sediment under certain environmental conditions. The buildup of this sediment can make Kynar retention rod removal difficult. EdgeTech recommends covering the glands by wrapping 2" electrical tape around the housing to prevent this. If a Kynar retention rod is difficult to remove and sediment egress is suspected, soak the instrument in warm water to soften the sediment. When trying to remove the rod, pull the tangent to the housing.
Release Shaft: To prepare the release mechanism, apply a thin coating of Silicone grease to the release shaft threads. EdgeTech recommends Novagard G624. Do not leave the release link bottomed out when threading the release link onto the shaft. Thread the link entirely on and then back it off ¼ to ½ of a turn to facilitate the installation of the anti-rotation block.
Top Pad Eye: Ensure the isolation washers are in place on the top pad eye. Using a shackle without the isolation washers in place will lead to corrosion.
Purging: Dry Nitrogen purging is recommended but not mandatory. If you are going to purge the instrument, follow the procedure in the manual, and do not pull an excessive vacuum. Ensure the purge port plug is in place before deployment.
Pre-Deployment Check: Run through the releases command set with a deck unit to verify that the release is fully functional.
Deployment: Do not shock load the release. Kicking a relatively small anchor off the stern of a vessel can generate very large dynamic forces.

PORT LF-SD

0010189_REV_F

A.0 PORT LF-SD Kits and Options

A.1 Spares Kit

PART NUMBER DESCRIPTION 0008467 REV D ASSY TOP KIT SPARES PORT MFE /LF-SD

0005939 0005955 0005952 0005920 0007200
0005381 0009623 0024178 0007135 0018622 0006797 0019478 0019510

O-RING BUNA-N 70 2-148 STANDARD ROUND BLACK
O-RING BUNA-N 90 8-240 BACKUP PARBAK ROUND BLACK O-RING BUNA-N 70 2MM WIDE 10MM ID 14MM OD STANDARD ROUND BLACK O-RING BUNA-N 70 2-008 STANDARD ROUND BLACK HARDWARE WASHER STD SHOULDER 0.378 0.187 INCH BARREL NYLON HARDWARE SCREW STD MACHINE PAN HD PHILLIPS 10-32 01 INCH NYLON STRIP CLOSURE KYNAR 12 INCH
LINK RELEASE PORT SCREW OFF ULTEM MOLDED THREADS HARDWARE WASHER STD FLAT INSULATING 12 0.26 INCH ID 0.688 INCH OD NYLON ANODE SMALL 0.75 INCH 1-5/8 INCH AL
HARDWARE STUD STD THREADED 1/4-20 0.75 INCH 316 SS
LABEL SHEET WHITE MAILING 04 INCH 1.33 INCH / 14
DOC TEMPLATE PORT MFE / LFSD SPARES KIT LABEL SET

Table 5-1: Port LF-SD Spares Kit

A.2 O-Ring Kit

PART NUMBER DESCRIPTION 0020597 REV A ASSY TOP KIT PORT MFE / LFSD ORING

0005939 0005955 0005952 0005920 0021041

O-RING BUNA-N 70 2-148 STANDARD ROUND BLACK
O-RING BUNA-N 90 8-148 BACKUP PARBAK ROUND BLACK O-RING BUNA-N 70 2MM WIDE 10MM ID 14MM OD STANDARD ROUND BLACK O-RING BUNA-N 70 2-008 STANDARD ROUND BLACK
DOC TEMPLATE O-RING BUNA-N KIT LABEL SET

Table 5-2: Port LF-SD O-Ring Kit

QUANTITY
2 2 1 2 2 2 2 1 1 2 2 1 1
QUANTITY
10 10 5 10 1

38
A.3 PORT LF-SD Remote Release Kit Option
The remote release physically separates the release and transducer ends of the PORT LF-SD for use in certain operations.
Figure 5-21: Port LF Remote Release Kit ICD

39 Figure 5-22: Port LF With Remote Release Kit ICD

40 Figure 5-23: ASSY Top Port LF Kit with Remote Release ICD

A.4 PORT LF-SD Tandem Kit Option
The PORT series of acoustic releases comes with an optional tandem kit. A tandem kit joins two releases, providing a single lift point and single release point. A tandem kit can used with a strongback configuration as well.
WARNING! The primary purpose of the tandem kit is to add redundancy to the mooring, thereby increasing the odds of instrument recovery. A Tandem Kit does not increase the working or release load ratings of tandem assembly.
When a tandem is used with a mooring, it can be recovered by releasing either PORT LF-SD release. In the event of a failure of the mooring to detach from the anchor, the RELEASE command can be sent to both PORT-LF-SDs, freeing both from the oblong ring and chain assembly. In normal use, when just one release is triggered, the only thing lost is the oblong ring.
NOTE: When used to release heavy loads, the last thread of the release link may pull out. Carefully inspect the release links after recovering the tandem set. Replace any damaged release links as required.

PART NUMBER DESCRIPTION 0017442 REV C ASSY TOP KIT PORT LF-SD / MFE TANDEM

0020891 0020892 0024178 0006636
0011227 0005843 0018494

ASSY TOP SPREADER PORT LF SD TANDEM
ASSY BOTTOM SPREADER PORT LF / SD TANDEM
LINK RELEASE PORT SCREW OFF ULTEM MOLDED THREADS HARDWARE SHACKLE STD ANCHOR 0.3125 INCH DIA 1500LB HIGH STRENGTH GALVANIZED CARBON STEEL W/ SAFETY PIN ASSY SUB CHAIN PORT / SPORT LF TANDEM 0.3125 INCH 1900# COLD GALV STEEL 1.50FT LINK OBLONG 0.50 INCH 7400# WELDLESS ALLOY STEEL
DOC DRAWING ICD PORT LF / SD TANDEM ASSEMBLY

Table 5-3: PORT LF-SD Tandem Kit

QUANTITY
1 1 2 2 1 1 1

Figure 5-24: PORT-LF-SD Tandem Kit Assembly ICD 0010189_REV_F

43 Figure 5-25: PORT-LF Strongback Tandem Kit Assembly ICD

A.5 PORT LF-SD Strongback Option
The PORT LF-SD Strong Back Release Transponder is ideal for heavy-weight deployments in coastal environments. The strongback portion of the unit increases the lift load rating to support heavy mooring deployments.
The Strong Back option for the PORT acoustic release increases the release rating of a PORT LF-SD to 2,500 pounds (1,136 kg) and the lifting load to 3,500 pounds (1,590 kg).

PART NUMBER DESCRIPTION 0019087 REV A ASSY TOP KIT PORT LF SD STRONGBACK

QUANTITY

0008170 0008179 0008175 0008167 0008189
0007850
0008191 0007170 0008192 0005326 0008205 0008195 0007165 0005323 0008197 0007317 0013662 0006595 0026286 0019088 0017668

ASSY TOP KIT PORT STRONGBACK PARTS

WASHER SHOULDER 0.5 INCH SHACKLE DELRIN 20% GLASS FILLED

CLAMP PORT MF STRONGBACK DELRIN

ASSY SUB DROP LINK PORT STRONGBACK

HARDWARE BEARING SLEEVE FLANGED 0.375 ID 0.625 OD 0.5 LENGTH ACETAL PLASTIC

HARDWARE BEARING SLEEVE 0.625 INCH BOLT DELRIN 20% GLASS FILLED

HARDWARE WASHER STD FLAT 0.625 INCH 0.75 INCH ID 1.5 INCH OD PLASTIC

HARDWARE WASHER STD FLAT 0.375 316 SS

HARDWARE BOLT STD HEX 3/8-16 2.25 INCH 316 SS

HARDWARE NUT STD HEX NYLOCK 3/8-16 316 SS

HARDWARE BOLT STD HEX 5/8-11 2.75 INCH 316 SS

HARDWARE NUT STD HEX NYLOCK 5/8-11 INCH 316 SS

HARDWARE WASHER STD FLAT 0.25 INCH 316 SS

HARDWARE NUT STD HEX NYLOCK 1/4-20 316 SS

HARDWARE BOLT STD HEX 1/4-20 02 INCH 316 SS

ANODE 2300 RUDDER 1.375 INCH DIA ZINC

HARDWARE SCREW STD MACHINE CAP SOCKET HD HEX 1/4-20 0.375 INCH 316 SS

RTV 133 BLACK

LUBRICANT AQUA SHIELD BOTTLE

DOC DRAWING ICD PORT LF SD STRONGBACK TANDEM KIT

DOC DRAWING ICD PORT LF-SD STRONGBACK KIT

Table 5-4: PORT LF-SD Strongback Kit

PORT LF-SD

0010189_REV_F

45 Figure 5-26: PORT-LF-SD Strongback Kit ICD

46
A.6 PORT LF-SD Pop-Up Option
The PORT LF-SD can be optionally configured as a pop-up buoy system. This configuration allows the unit to float to the surface upon detaching from a payload.
A.6.1 Pop-Up Assembly
A PORT LF-SD Pop-Up configured system is typically ordered and shipped completely assembled and configured. Purchasing a kit later to modify the existing PORT LF-SD system is possible. If a Pop-Up canister kit was purchased separately, it will consist of:
· (1) Top (Flotation) Cup · (1) Bottom (Line Holding) bucket · (1) Sub-Flotation Pop-Up Assembly Drawing [PN 0015784] · (1) Package Containing all Required Assembly Hardware
o (1) Clamp PORT Pop-Up Delrin o (1) Rubber Strip Neoprene 0.25" thick;
01" wide o (1) Clamp Hose 0.50 3-1/16 x 4" o (4) Tie Cable Clamp Head 102mm o (2) Galvanized Carbon Steel Shackle
[1500lb]
Required Tools · (1) Flat Head Screwdriver · (2) 9/16" Wrenches · (2) 7/16" Wrenches
A.6.2 Line Packing Considerations
The decision of what diameter and type of line to use must be carefully considered, and safe working loads and shock loading must be considered.
1. The canister's line capacity is a function of line diameter, line construction, and material.
2. Stiff Lines can retain shaping and can be challenging to pack. For example, 3-strand polypropylene does not pack as well as single- or double-braid nylon.
3. When packing the canister with line, EdgeTech strongly recommended the line be randomly `flaked' into the canister. Avoid coiling or laying the line in a pattern, as randomly packing and tamping it down as it builds up will yield the best results. The end of the line should be attached to the stud inside the flotation assembly.
CAUTION: Flaking is the preferred method of line packing. Never wind the line around the center post, as this can cause line tangling.

PORT LF-SD

0010189_REV_F

47 4. The floatation assembly provides 15 lbs. of buoyancy, +5 lbs. with optional trawl float.
A.6.3 Line Packing Procedure
1. Ensure that the line to be used is of proper strength and is of the proper material for the application. EdgeTech recommends a premium double-braided nylon rope.
2. Attach the end of the line to the outside and inside of the bucket with plastic zip ties, and attach the end of the line to the chain at the bottom of the bucket with a shackle, as pictured below.
Zip Ties
Figure 5-27: Line Attached to the Inside and Outside of the Bucket
Line Attached to Chain
Figure 5-28: Attach the End of the Line to the Chain

48
3. Flake the line into the bottom of the bucket, going around 2/3rds of the way around the center and then back. Continue flaking back and forth, advancing further around each time so the line lays evenly around the center post. FIGURE 5-29 illustrates how to load the line. a. Compress the line periodically as you load the bucket. :

Figure 5-29: An Example of Flaked Line into the Canister
4. Attach the top end of the line to the stud inside the top floatation. 5. Once the bucket is loaded with the line, follow the assembly instructions below to complete the
Pop-up system.
A.6.4 Pop-Up Assembly
1. Install the top collar on the PORT LF-SD release by sliding it on the release end up to the transducer. Do not tighten the clamp. This will be done when the Pop-up assembly is completed.

PORT LF-SD

0010189_REV_F

49
Figure 5-30: The PORT-LF-SD Transducer with Clamp
Loose Clamp Figure 5-31: Installed PORT-LF-SD to Pop-Up

50
2. The release is mated to the top cup by sliding the release down the opening in the flotation so the top collar lies flush with the top of the cup.

Figure 5-32: Inserting Release into the Top Cup from Above 3. Complete the top cup mating by installing the ¼" thick anti-slip neoprene strip around the release
and secure it with the included 316SS hose clamp. DO NOT OVERTIGHTEN. a. The anti-slip ring functions as a catch in the unlikely case that the pop-up is overturned on ascent. It holds no load during standard operation.
Clamp

Anti-Slip Ring Figure 5-33: Installing Anti-Slip Ring

PORT LF-SD

0010189_REV_F

51
4. Fill the bottom cup with the desired line weight using the proper LINE PACKING PROCEDURE. Avoid coiling the line around the center tube, as the line could be tangled during payout after the release command is sent. Affix one end to the stud protruding from the flotation, wind the other end out through the lip notch, and attach the line to the shackle on the chain on the bottom bucket. EdgeTech recommends utilizing the small holes lining the lip notch with light-duty zip ties to secure the line tightly to the outside of the cup.
CAUTION: Always use the proper LINE PACKING PROCEDURE. Never coil the line around the center post. After the RELEASE command is sent, a coiled line may become tangled or snag during payout.
Figure 5-34: Bolting Release to Pop-Up Bottom Cup 5. Complete the assembly by sliding the 3/8 galvanized bolt through the Pop-Up's bottom tube,
through the anchoring chain's last two links, and mating the Ultem release link in the center. It may be necessary to unscrew the link and turn it to align the bolt. 6. Secure the connection by double-nutting the bolt with a split lock washer between two nuts. The two nuts need to be tight, while the bolt should move back and forth freely in the tube. 7. Tighten the clamp around the Release. The collar should be rigidly affixed.
a. The collar will fit in the same position regardless of the MFE (flush 3.5" transducer cap) or LF-SD (4.2" exposed transducer flange cap).
CAUTION PORT LF-SD ONLY: When the Release Link is attached to the Pop-Up housing, there may be a small gap between the PORT LF-SD transducer and Pop-Up collar.

A.6.5 Pop-Up Kits
EdgeTech offers 200 and 400 meter pop-up canister kits.

PART NUMBER DESCRIPTION 0010838 REV F ASSY TOP KIT PORT POP-UP CANISTER 200M RATED

0009489 0009594 0019581 0010612 0010603
0010609 0010610 0010611 0011228
0006636 0006927 0015784 0005323 0007165 0008197 0019077 0020174 0026198

CUP BOTTOM PORT POP-UP
CUP TOP PORT POP-UP W/ FOAM 200M RATED
CLAMP PORT POP-UP DELRIN
STRIP NEOPRENE 60A 0.25 INCH THICK 01 INCH WIDE HARDWARE BOLT STD MACHINE HEX HD 3/8-16 X 5.0 INCH GALVANIZED STEEL HARDWARE WASHER STD SPLIT LOCK 0.375 ID 0.68 OD 0.09 GALVANIZED STEEL HARDWARE NUT STD HEX 3/8-16 GALVANIZED STEEL
HARDWARE CLAMP HOSE 0.50 3-1/16 X 4 INCH 316 SS ASSY SUB CHAIN PORT POP-UP 0.3125 INCH 1900# COLD GALV STEEL 0.75FT HARDWARE SHACKLE STD ANCHOR 0.3125 INCH DIA 1500LB HIGH STRENGTH GALVANIZED CARBON STEEL W/ SAFETY PIN TIE CABLE CLAMP HEAD 102MM NYLON NATURAL ROHS
ASSY SUB FLOATATION POP-U
HARDWARE NUT STD HEX NYLOCK 1/4-20 316 SS
HARDWARE WASHER STD FLAT 0.25 INCH 316 SS
HARDWARE BOLT STD HEX 1/4-20 02 INCH 316 SS
DOC DRAWING ICD PORT POP-UP CANISTER 200M RATED
ASSY TOP MANUAL PORT LF-SD / PORT MFE POP-UP HARDWARE
BOX SHIPPING POP-UP 36 INCH X 16 X 16 INCH CARDBOARD

Table 5-5: PORT LF-SF Pop-Up Canister 200-Meter Kit

QUANTITY
1 1 1 .092 Feet 1
1 2 1 1
2 4 1 1 2 1 1 1 1

PORT LF-SD

0010189_REV_F

PART NUMBER DESCRIPTION 0015076 REV E ASSY TOP KIT PORT POP-UP CANISTER 400M RATED

QUANTITY

0009489 0015059 0019581 0010612 0013898
0010603
0010609 0010610 0010611 0012745 0011228
0006636 0006927 0015784

CUP BOTTOM PORT POP-UP
CUP TOP PORT POP-UP W/ FOAM 400M RATED
CLAMP PORT POP-UP DELRIN
STRIP NEOPRENE 60A 0.25 INCH THICK 01 INCH WIDE HARDWARE SCREW STD SET SOCKET HD HEX 1/4-20 0.75 INCH 18-8 SS CONFORMABLE NYLON TIP HARDWARE BOLT STD MACHINE HEX HD 3/8-16 X 5.0 INCH GALVANIZED STEEL HARDWARE WASHER STD SPLIT LOCK 0.375 ID 0.68 OD 0.09 GALVANIZED STEEL HARDWARE NUT STD HEX 3/8-16 GALVANIZED STEEL
HARDWARE CLAMP HOSE 0.50 3-1/16 X 4 INCH 316 SS
O-RING BUNA-N 70 2-341 STANDARD ROUND BLACK ASSY SUB CHAIN PORT POP-UP 0.3125 INCH 1900# COLD GALV STEEL 0.75FT HARDWARE SHACKLE STD ANCHOR 0.3125 INCH DIA 1500LB HIGH STRENGTH GALVANIZED CARBON STEEL W/ SAFETY PIN TIE CABLE CLAMP HEAD 102MM NYLON NATURAL ROHS
ASSY SUB FLOATATION POP-U

1 1 1 .092 Feet 1
1
1 2 1 1 1
2 4 1

Table 5-6: PORT LF-SF Pop-Up Canister 400 Meter Kit

54
A.6.6 Pop-up Up Mechanical Drawings
Figure 5-35: PORT LF-SD Flotation Pop-Up Assembly Drawing - 0015784

55 Figure 5-36: PORT LF-SD Pop-Up Canister 200M Assembly 0010838

56 Figure 5-37: PORT LF-SD PORT LF-SD Pop-Up Canister 200M Drawing - 0015749

References

Mike Mykytyn Adobe PDF Library 24.2.197