Operation Manual

ULTRASONIC SPEED SENSOR
6
1.5 Setup
The setup and calibration procedure for the Ultrasonic Speed Sensor is
identical to the procedure for calibrating a paddlewheel speed sensor as
explained in the relevant section of your system User Manual.
1.6 Specifications
Ultrasonic frequency: 4.5MHz
Pulse repetition frequency: 5.7KHz (fixed)
Distance to particles: 8 to 13cm (3 to 5 inches)
Thru-hull diameter: 5.1cm (2 inches)
DC voltage supply: 10 to 15 Volts
Current: 155mA @ 12 VDC
Operating temperature range:
0°C to 40°C (32°F to 140°F)
Data update rate: 2Hz
Accuracy: ± (2% + 0.1 knot)
Minimum speed: 0.1 knot
Maximum speed: 60 knots
Outputs: Simulated Hall cell
paddlewheel at 20,000 pulses
per nautical mile (5.6Hz/knot)
Weight: 1.3Kg (2.8lbs)
Table 1.1 - Specifications