4:2 CONNECTING THE DISPLAY
Connect the black wire to the negative supply and the red wire to the positive via
a 250 milli-amp fuse. Plug the paddle wheel unit into the socket on the display
unit.
4:3 LOG OPERATION
When switched on the display will momentarily display the total distance and
then revert to reading speed. The speed is shown in nautical miles per hour and
is reliable up to 25.0 knots. (At higher speeds cavitation around the paddlewheel
may reduce accuracy.)
A short press of the SPEED key will turn the backlight on and off.
A short press of the TRIP key will display the Trip distance. To reset the trip to
zero first select trip by pressing the TRIP key. When the trip distance is shown
press and hold the TRIP key until the display shows ' F '. The trip is then reset to
zero. The trip distance is shown in tenths of nautical miles up to 99.9nm and in
single miles up to 999nm thereafter.
A short press of the TOTAL key will display the total distance. The unit will dis-
play the total distance travelled to 999 nautical miles. This counter cannot be
reset.
A long press of the SPEED key will return to the Speed display
CALIBRATION
The calibration is preset in the factory. The type of hull and the position of the
paddlewheel may affect the performance of the unit. If the log under or over
reads then the calibration factor can be adjusted to compensate.
Enter the Engineering mode by first turning off the power supply to the instru-
ment. Press and hold the SPEED key whilst the power supply is turned back on.
The word ENG will appear on the display. Press either the TRIP or TOTAL keys to
display the calibration setting. This is normally 100 (%) when it leaves the factory.
Press TRIP to increase or TOTAL to decrease the number. Each press will incre-
ment or decrement the number by 1%. When the desired calibration factor is
attained a long press of the SPEED key will return the unit to normal operation.
Both speed and distance are calibrated simultaneously. The calibration factor is
stored in a non-volatile memory and is retained when power is off.
