Airmar CS4500-610—Ultrasonic Speed - Manual

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Thru-Hull, Retractable with Valve
Ultrasonic Speed & Temperature Sensor
Model: CS4500-610
U.S. Patent 6,426,918; 6,671,225; 6,678,208. EP 1 634 087
Applications
• Not recommended for boats designed to pull air under the hull.
• Plastic housing recommended for fiberglass or metal hull only.
Never install a plastic housing in a wood hull since swelling of
the wood may fracture the plastic.
• Bronze housing recommended for fiberglass or wood hull only.
Never install a bronze housing in a metal hull because
electrolytic corrosion will occur.
• Raymarine ST-40—The ultrasonic insert is too long for the
existing housing. Install the new housing supplied.
How the Ultrasonic Speed Sensor Works
The speed sensor uses ultrasonic pulses to collect echoes from
small particles in the water as they pass under two transducers
embedded in the insert (see Figure 1). These transducers monitor
the particles in their respective beams. As the boat travels through
the water, both transducers ‘view’ the same stream of particles.
Because it takes time for particles to travel between the two
transducers, the aft transducer detects the particles later than
does the fore transducer. By measuring this time lapse, the
instrument calculates the boat speed. If the boat is airborne, even
for a short time, or in highly aerated water, the sensor will
measure an incorrect speed.
scanning transducer
FORE AFT
hull
vessel direction
particle stream
Figure 1. Monitoring particles in the water
INSTALLATION INSTRUCTIONS OWNER’S GUIDE &
Record the information found on the cable tag for future reference.
Part No._________________Date___________
Follow the precautions below for optimal product
performance and to reduce the risk of property
damage, personal injury, and/or death.
WARNING: The ultrasonic insert must be installed in
a housing with a valve.
WARNING: Always wear safety goggles and a dust
mask when installing.
WARNING: The power must be ‘OFF’ before proceeding.
WARNING: The power supply voltage must be
10-15VDC
WARNING: A safe installation requires a 0.5 amp fast
blow fuse or circuit breaker.
WARNING: The valve is not a watertight seal! Always
use the insert or blanking plug secured with the safety
wire for a watertight seal.
WARNING: The o-rings must be intact and well
lubricated to make a watertight seal.
WARNING: Always attach the safety wire to prevent
the insert or blanking plug from backing out in the
unlikely event that the cap nut fails or is screwed on
incorrectly.
WARNING: Immediately check for leaks when the
boat is placed in the water. Do not leave the boat
unchecked for more than three hours. Even a small
leak may allow considerable water to accumulate.
CAUTION: Never pull, carry, or hold the transducer by
its cable; this may sever internal connections.
CAUTION: Never use a fairing with a plastic housing;
the protruding sensor would be vulnerable to damage
from impact.
CAUTION: Never install a metal housing on a vessel
with a positive ground system.
CAUTION: Never use solvents. Cleaners, fuel,
sealants, paint, and other products may contain strong
solvents, such as acetone, which attack many
plastics, greatly reducing their strength.
IMPORTANT: The sensor must be in good contact
with the water at all times.
IMPORTANT: Read the instructions completely
before proceeding with the installation. These
instructions supersede any other instructions in your
instrument manual if they differ.
Copyright © 2002 Airmar Technology Corp.