Edgetech PORT LF, Руководство пользователя по оборудованию

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SECTION 1: OVERVIEW
This manual describes the EdgeTech low frequency Push Off Acoustic Release/Transponder (PORT-LF).
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 Kg.
The PORT-LF has been 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.
The PORT-LF uses a version of the EdgeTech’s field-proven, Binary Acoustic Command System (BACS) code
structure. This makes the POR-TLF compatible with the 8011, 8011A, 8011M, AMD200R, and PACS deck
Units available from EdgeTech.
The BACS coding structure provides 12,000 possible secure command codes. Each 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).
1.1 Basic Functionality
The transponder function can be turned ON or OFF with the ENABLE and DISABLE commands, respectively.
There is also an Auto Disable function that will disable the transponder function after 512 pings, which
prevents the batteries from running down if accidentally left enabled. The ping counter resets to zero
each time it is enabled. When disabled the transponder will not reply when interrogated, which 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 transponder ENABLE and DISABLE command has no
effect on the RELEASE command.
The RELEASE command causes the Release Thread Shaft on the instrument to rotate and to push off the
threaded Release Link. While releasing, the PORT-LF will ping once for every rotation of the release shaft.
This provides confirmation 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 has no effect on
the ENABLE and DISABLE commands.