Post Deployment - Edgetech PORT-LF User Hardware Manual

4-26
Unless otherwise specified, the PORT-LF 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.
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 should also be left 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 release housing and release mechanism should be performed to detect any signs
of damage, excessive wear, corrosion, etc.
If the PORT-LF 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.
PORT-LF 0008595_REV_F