Speed Calibration - Dakota Digital VFD3 Installation And Operation Manual

SPEEDOMETER SETUP
Press and hold SW 1 switch, then turn the key on and start the engine. Once the engine
is running, release the switch. When "SPEED" is displayed, press the switch again and then
release it. The message display should switch between "AUTO", "ADJUST", "UNIT", and
"OUTPUT".
METRIC SELECTION
If you are setting the system up for metric displays, press the switch when "UNIT" is
displayed.
Press and release the switch until "KPH C" is displayed.
Press and hold the switch unit "DONE" is displayed.

SPEED CALIBRATION

There are two methods for calibrating the speedometer, auto cal and adjust. Either one
can be used. Auto cal requires that you have one measured mile marked out (km for metric).
Adjust requires you to follow another vehicle going at a set speed or timing your self over a mile
to determine your speed.
Auto Cal
When "AUTO" is displayed press and release the switch. The speedometer will display
"SEt", the fuel, volt, oil, and water will display normally, and the message display will show
zeroes. You should now begin driving the measured mile. The message display will count the
number of pulses received from the sensor. The message display cannot be used to determine
when a mile has been driven. Once you reach the end of your marked mile, press the switch
again. The calibration is now done.
Adjust
When "ADJUST" is displayed press and release the switch. The system will restart with
"ADJUST" on the message display. The fuel, volt, oil, water, and tach will operate normally.
The speedometer will show the speed reading. Begin driving at a known speed. Press switch 1
to increase the speedometer reading and press switch 2 to decrease the speedometer reading.
When the speedometer is correct you can stop and restart the system. The new calibration will
be saved.
Speed Output
If a speed output signal is need for an ECM or cruise control, the 2k ppm terminal can be
used. This will normally provide a 2000 pulse per mile signal after the speedometer has been
calibrated. If you need a 4000 pulse signal, go to the SPEED setup menu and then select
"OUTPUT".
Press and release the switch until 4K PPM is displayed.
Press and hold the switch until "DONE" is displayed.
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