JDC ELECTRONIC SA SpeedWatch Instruction Manual

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Wireless Speed Computer

Instruction manual

1. Introduction

The SPEEDWATCH wireless speed computer

is a highly accurate means to measure speed

through water of any low-speed watercraft

such as a sailboat, yacht, kayak or small

powered boats. Designed for the serious racer

and the advanced users, the SPEEDWATCH gives

valuable feedback on the performance of your

watercraft.

The small impeller is placed under the craft, in

a variety of mounting possibilities. When your

boat or kayak is moving through the water,

the impeller rotates creating a magnetic field

that penetrates through hull without wires.

This magnetic field is received by the sensitive

sensor at the end of a cable on the transmitter,

which is placed within 30 cm from the impeller.

The transmitter then sends out a low-frequency

radio signal that is received by the display up to

5 meters. The signal is processed and displayed

as instant speed.

The SPEEDWATCH uses this speed signal to

calculate the instant, balanced, and maximum

speed as well as the trip and total distance. The

SPEEDWATCH outperforms any GPS with regards

to precise speed and distance measurement,

allowing for minute changes in performance to

be registered and adjusted. The SPEEDWATCH

becomes an invaluable tool when sailing or

rowing in currents, as it measures true speed

through water, rather than average speed over

land like a GPS.

The magnetized impeller requires no power

source, the transmitter uses a 9V battery, and

the display includes a long-life Lithium battery,

good for hundreds of hours of use.

FUNCTION

Speed : Instant, balanced, maximum, average

Distance : Trip, total

Chronometer : Automatic or manual

Countdown Timer : 10, 6, 5, 3, or 1 minute(s)

Time of day : AM/PM mode

Backlight : Red backlight

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Summary of SpeedWatch

Page 1
Wireless speed computer instruction manual 1. Introduction the speedwatch wireless speed computer is a highly accurate means to measure speed through water of any low-speed watercraft such as a sailboat, yacht, kayak or small powered boats. Designed for the serious racer and the advanced users, the ...
Page 2
2 display a) lcd b) backlight button c) speed select button d) distance select button e) chronometer start button f) spring snap for mounting plate g) battery cover (four screws) transmitter h) 0.3 m cable i) sensor for impeller j) transmitter body k) battery cap impeller l) mounting plate m) fin n)...
Page 3: 3. Start Up The Instrument
3 3. Start up the instrument display from the factory, the speedwatch is in a low power state, with the time flashing. Press any button to enter normal mode. The speedwatch is now in manual mode; it will only receive data from the transmitter when the chrono button is pressed and the impeller is rot...
Page 4: 4. Programming The
To enter in the programming mode, you have to be either in manual chronometer mode with stopped countdown timer or in automatic and not read the signal. Press and hold three seconds the both speed and chrono buttons to enter in the programming mode. “chrono” and “man” (manual) or “auto” (automatic) ...
Page 5: 5. Basic Operating Mode
Countdown timer the speedwatch can be set to provide a countdown timer for the start of races. To enter the programming mode, you must be either in manual chronometer mode with the timer stopped or in automatic and reading any signal (the timer will be stopped). Press and hold both the speed and chr...
Page 6: 6. Mounting The
6 6. Mounting the speedwatch impeller the impeller is fixed on the watercraft, with many options. We recommend you to fixe the impeller at the prow, to avoid turbulences. Transmitter the transmitter is inside the hull with the magnetic sensor at 30 centimeters from the impeller. The transmitter has ...
Page 7: 7. Speed Sensor Calibra-
7 impeller mounting options small white fin mount: carefully clean the area before to stick the adhesive and wait 24 hours before submersion for best adhesion. Rudder attachment: large blade fin mount: 7. Speed sensor calibra- tion this operation allows the speedwatch to be adjusted for an exception...
Page 8: 9. Limite Warranty
8. Technical specifications impeller transmission the impellers, fixed on synthetic sapphire bearings, are equipped with powerful magnets that generate magnetic impulses. These impulses are collected by coils (also called “sensor”) and treated electronically to be display speed. The magnetic impulse...