M. H. Corbin, LLC OBD-II Vehicle Distance Translator
Technical Manual
Version 3.0
Page 7 of 9
4.4.
Calibration Summary (Manual)
To enter in a known calibration number if your vehicle has previously been calibrated.
With the instrument in
COUNT/HOLD:
1CAL
key -
DISP/HOLD
- Change car number
Enter new calibration number (_ _ _ _ )
MARK/ENTER
- Will exit calibration mode
ON/OFF
(Stores your calibration number into memory)
5. Recommended Operation of Vehicle
Some makes of vehicles contain ECUs which report the speed of travel as the car was several
seconds ago, not the speed currently being travelled. Because the VDT operates using the
speed reported by the ECU, the user may notice during acceleration or braking that the speed
readout on the NiteStar DMI is slightly retarded from the speed the vehicle is actually travelling.
For example, if the user is watching the distance and speed readout on the NiteStar DMI while
starting to drive from a standstill, the distance may not begin registering until a few seconds
after the user has star
ted driving. This is normal operation of the vehicle’s ECU and is not an
indication of a defective unit.
Similarly, if the user is slowing the vehicle down, the distance readout on the NiteStar DMI will
continue incrementing for a few seconds, even after the vehicle has come to a complete stop.
This is normal operation of the vehicle’s ECU and is not an indication of a defective unit.
For vehicles with retarded speed readout, the user is recommended to operate the vehicle
within the following guidelines to ensure accurate measurements:
A. The user ends measurement when the vehicle is travelling approximately the same
speed as when measurement was initiated.
B. The user brakes/accelerates the vehicle with approximately the same force.
Examples of advisable operation follow:
Matt wants to measure the length of a guard rail. Matt pulls up on the side of the road to
the start of the guard rail and configures his NiteStar DMI to start recording distance.
Matt drives to the end of the guard rail, stops, and takes a reading after the NiteStar DMI
has stopped recording distance.
Mike wants to measure the length of a guard rail. Mike is on the highway travelling 50-
60mph and does not want to pull over to make a measurement. Mike begins
measurement of the guard rail, and ends measurement while still travelling 50-60mph.
Summary of Contents for LLC OBD-II
Page 1: ......