JDC Electronic SA Speedwatch - Manual (Page 7)

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 exceptional accuracy.
It’s normally not necessary. However, the
SPEEDWATCH can be calibrated with an existing
speed sensor to accuracy measure the speed.
Calibration is carried out from the programming
mode. Press and hold both the SPEED and
CHRONO buttons for three seconds to enter
the programming mode. “chrono” and “man”
(manual) or “auto” (automatic) will flash. Press
the SPEED button five times to advance to the
calibration mode. The proper calibration is 40.0
for the SPEEDWATCH impeller. To adjust the
SPEEDWATCH, increase this number (CHRONO
button) to decrease the speed reading. Decrease
this number (DISTANCE button) to increase
the speed reading. The displayed number
corresponds to the distance in mm done by one
turn of the impeller or the circumference of the
wheel. Press and hold the SPEED and CHRONO
buttons for 3 seconds to accept all settings and
go back to the normal operating mode.