- CALIBRATION -
All our Brantz Tripmeters & Retrotrips can be calibrated easily in Miles or Kilometers, below is a step by step guide for calibration with some extra tips.
First of all you need a known measured distance. These are usually provided at the beginning of your events by the organisers however we always recommend calibrating your tripmeters over a repeatable distance well in advance of any event as this is the best way to check everything is working properly.
Google maps now lets you measure a distance between points, should you wish to use this as a rough guide for a calibration experiment, alternatively there are mile markers on certain roads, or your local authority or police department usually has a defined distance marked out.
Once you have your measured distance (for this example we will use a measured distance of 4.56 Miles).
Enter 456 (measured distance) into your calibration push-wheel switches on the front of your International or Retrotrip Tripmeter.
Draw up at the start of the measured distance and zero both Displays
Drive your measured distance and exactly on the end of the measured distance note down the readings in the Distance Displays (they should both match) i.e. 06.78
Enter what was shown on the Display into the Push-Wheel Switches ignoring the decimal point i.e 678
Now, re-drive that measured distance a couple of times and check you get exactly 04.56 on both displays consistently.
Minor calibration adjustments can be carried out by:
If the distance reading is too HIGH - INCREASE the calibration figures
If the distance reading is too LOW - DECREASE the calibration figures
Longer Calibration Distances
If your measured distance (or the Rally Organisers 'official distance') is longer than 9.99 Miles or 9.99 Kilometers you will need to use the following formula in order to calibrate your tripmeter, please see the example below:
Enter a Calibration figure between 399-999 (C) into the push-wheel calibration digits (for this example we have used 499)
Draw up to the start of the measured distance and zero both displays
Drive your measured distance (D) (for this example we have used 12.50 Miles)
Note down the readings on the Distance Displays (T) (for this example we have used 21.99)
Now use the following formula:
(T/D) x C
(21.99/12.5) x 499
=>1.7592 x 499
So enter 878 into your calibration push-wheel switches.
To confirm the figure, re-drive the measured distance several times and BOTH your displays should show the official distance e.g. 12.50 miles.
If you are struggling to calibrate your tripmeter, for example, if you find both displays are mismatching or you are getting a different reading each time, then it is likely you will need to go back and investigate your installation. The most likely causes are:
Electrical Interference coming from your vehicle
A sensor set up issue
Miles to Kilometer or Kilometers to Miles Conversion
If you already have a very accurate calibration distance in Miles, you can multiply your calibration figure by 1.6093, enter your new figure and proceed to the re-driving stage of the above instructions.
If you were going from Kilometers to Miles you would divide your current calibration figure by 1.6093, enter your new figure and proceed to the re-driving stage of the above instructions.