User's Manual

SECTION 1
Introduction
35 Meadowbrook Drive, Milford, New Hampshire 03055-4613 USA
Tel [phone] • Fax [phone] • e-mail: [e-mail]
AIRMAR
TECHNOLOGY CORPORATION
m 26
2000 #17-1205
The S650/ST650 sensor incorporates a patented self-closing valve
which minimizes the flow of water into the boat when the speed/
temperature insert is removed. This allows routine paddlewheel
cleaning without getting wet. Fins straighten water flow onto pad-
dlewheel and improve flow stability and accuracy at low speeds.
Because of the high degree of tooling, the ST650 is priced compa-
rably with standard paddlewheel sensors.
The S/ST650 paddlewheel and valve assembly can be retrofitted
into Airmar speed/temperature series: S/ST100, S/ST500, and
S/ST550. Boaters can upgrade to a self-closing S/ST650 without
changing their thru-hull fitting or hauling the vessel. Consult Air-
mar for the part number of the correct retrofit kit for your needs.
The S650 and ST650 are available in low profile and flush mount
styles.
S650, ST650
With Self-Closing Valve
U.S. Patent No.: 4,898,029; 5,186,050
Canadian Patent No. 1,313,775
Australian Patent No. 605,281
Japanese Patent No. 1851014
THRU-HULL MOUNT • Speed • Temperature
Fins straighten water flow onto paddlewheel increas-
ing flow stability and accuracy. Particularly effective
when a cross flow is present.
Self- closing valve eliminates “gusher” when speed/temperature
insert is removed
Plastic, bronze, and stainless housings
Low profile and flush mount housings
Specifications
•
Paddlewheel has four asymmetrical, hydrodynamic blades
•
Hall-effect magnetic sensor for high-level pulse output
•
Unitary bearing inside the paddlewheel hub assures exact
alignment and minimal rotational friction
•
Polished paddlewheel shaft for quick start up
•
Dual O-rings for superior sealing
•
Reverse polarity protection
•
Shielded cable to minimize noise pick-up and emission
•
Designed to meet CE requirements
•
Arrow and notch on housing facilitates installation
•
Alignment key for easy speed/temperature assembly
removal and insertion in difficult access locations
•
Installation requires 51mm (2") diameter hole
•
Rubber washer allows tightening hull nut
to irregular surfaces.
• Blanking plug included
•
Standard cable length: 9 m (30')
Applications
•
Plastic not for use in wood hulls
• Bronze for fiberglass or wood hulls only
•
Stainless steel compatible with any hull material
Options
•
No fins on either side of paddlewheel
•
Two wire speed circuit
• Temperature sensor
•
Pulse division circuitry for other pulse rates
•
Bronze cap nut for bronze housing #02-029
• Over-voltage protection (OVP)
Notes
• Use matching low profile or flush depth transducer for
echosounders requiring depth, speed and temperature
input
•
For Parts and Accessories
See pages p2 through p4