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MAN #650519C
Speed Calibration using the Adjust mode VFD3 / VHX / HDX / RTX:
This method requires entering setup of the GPS-50-2 AND the VFD/VHX/RTX at the same time.
➢
HDX setup can occur after the ignition is turned on.
**HDX/RTX systems can be configured with the Dakota Digital app for Apple and Android devices**
Enter Setup of GPS and VFD3/VHX/HDX/RTX
•
Hold the switch beside the GPS-50-2 display
and
SW1 for VFD3/VHX/RTX
•
Turning the key on. Release both switches.
o
HDX can enter setup after the ignition is on.
•
The GPS display will show the current revision code while this is held.
•
Release the switch. The d
isplay will show “
”.
•
Tap the switch once,
until “
” is displayed.
•
Press the switch and hold the switch until “
” is displayed.
•
Release the switch. The display will show the current speed pulse setting:
•
These values cannot be fine-tuned and represent commonly seen vehicle speed signals.
o
= 4,000
o
= 8,000 (default)
o
= 16,000
o
= 54,400
o
=128,000
•
Tap the switch on the GPS-50-2 to change the speed output
o
Expected default speed inputs to display 60 MPH (96 km/h):
▪
Current (plastic case) control boxes = 16,000 PPM -
▪
Aluminum VFD3, and STR boxes = 8,000 PPM -
•
Once the GPS-50-2 is set to the correct pulse rate, follow the speed setup in the appropriate
system manual(s) for the Adjust Mode, or use the app for HDX and RTX.
o
Sometimes the speed may not read 60 MPH (96 km/h), adjust so they match.
o
Sometimes the speed may match, but it is okay to offset the speed by 1 MPH or km/h
Saving Setting in VFD3 / VHX / HDX / RTX
•
VFD3 (old and current Series III) and VHX
o
Manuals say to come to stop, since the car is not moving, simply save the GPS settings
o
Press and hold the GPS switch to save the setting.
o
Tap the GPS-50-2 switch to display
, then hold to exit.
o
Once the speedometer is reading zero, you may turn the ignition off.
•
HDX and RTX
o
The corrected speed must be maintained for at least a full 10 seconds.
o
After a full 10 seconds, press and hold the GPS switch to save the setting.
o
Tap the GPS-50-2 switch to display
, then hold to exit.
o
You may turn the key off.
