Edgetech PORT LF, User Hardware Manual

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SECTION 3: INSTALLATION 3-2
PORT LF 0008595_REV_E
Furthermore, when instruments are deployed for long periods, the use of grease is considered important.
Apply grease to the threaded release shaft. EdgeTech recommends the use of Novagard G624, be sure to
use only silicone grease.
3.3 Status Reply
The PORT-LF is equipped with sensors that monitor the tilted or not tilted orientation of the system and
release shaft rotation. This information allows the Unit to send a coded status reply, based on the
instruments 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 that has been deployed and/or has
landed as planned. At the end of a deployment, this information is useful in determining 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 STATUS
15 pings at 2 second intervals “upright”
7 pings at 2 second intervals “tilted”
Table 3-1: Status Reply Meanings
The tilt sensor is a 45° mechanical switch that is mounted on the Release Circuit Board Assembly In the
standard instrument configuration, with the release mechanism down, the Unit is defined as “not tilted”.
For applications requiring a narrower maximum allowable angle of tilt optional tilt switches are available.
The switch can also be installed at different angles to change the standard orientation.