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Tiger Electronic Speedo Calibration

These instructions are loosely based upon the instructions supplied by ETB Instruments. They also assume your Tiger branded electronic speedometer is configured with Miles per Hour as its primary display type.

If it is configured with Kilometres per Hour, then replace miles in any of the instructions below with kilometres.


General Operations

  • The display can show either the total distance covered, or the trip distance. To cycle between these, press and then release the button
  • The total distance display counts the total distance travelled up to a maximum of 999999.9 miles. This (allegedly) cannot be reset
  • The trip distance is indicated by a 't' in front of the indicated distance. This counts up to a maximum of t9999.9 miles. This can be reset to t0.0 by pressing and holding the button for two seconds when either the trip or total distance displays are shown
  • The unit is initially calibrated to 41000 pulses per mile by ETB
  • As a standard feature, the unit is set to read between 2% and 3% fast in relation to the true speed at full scale deflection. (NOTE: You should not adjust your calculated pulses per mile ratio in order for this to show the exact feature)
  • There are three calibration options:

Selection of Calibration Method

To select the appropriate calibration method:

  • Press front mounted button and keep pressed
  • Apply 12 volts to instrument (via ignition)
  • The display will loop through AUtOCL, PULSE and AdJUSt at two second intervals
  • Release button when chosen option is displayed

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Automatic Calibration

For safety, these steps should be performed by the passenger. This requires a known measuring distance of exactly one mile.

  • Select AUtOCL calibration
  • After 3 seconds, the display will change to bUttOn
  • Start the vehicle and go to the start of the measuring track
  • Exactly at the beginning of the measuring distance, press and then release the button
  • Display will flash StArt
  • Drive the test distance with as constant a speed as possible (NOTE: no speed is shown during the calibration)
  • Exactly at the end of the measuring distance, press and then release the button
  • The determined pulse/distance ratio is displayed. For example, P 45000 indicates 45000 pulses per measured distance
  • If P 00 is displayed; this indicates no pulses were measured. Check the sender and the wiring and repeat the above steps again
  • The calibration is complete when the display changes to the total distance or trip mileage display
  • To re-calibrate this distance, you need to enter the AdJUSt mode

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Pulse Calibration

This requires the number of pulses per mile to be calculated based upon your tyres rolling radius and the ratio of your differential.

  • Select PULSE calibration
  • After 3 seconds, the display will change to the current pulse / distance ratio
  • The digit before the last one will start flashing
  • Start inputting the number of pulses per mile
  • The flashing digit is changed by holding the button until the desired number is shown
  • When the button is released the adjacent digit starts flashing
  • Repeat this until all digits have been entered
  • The calibration is complete when the display changes to the total distance or trip mileage display

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Adjustment Calibration

This is used to make a final adjustment should the indicated speed be incorrect after calibration using one of the above methods. When this operation has been completed, the number of pulses per mile will be adjusted accordingly in relation to the percentage increase or decrease you have set. For example, if you increase the number of pulses by 1% and originally had 50000 pulses/mile configured, the speedometer would now show 50500 pulses/mile.

It is recommended this configuration be completed using either a function generator, or by having the car on a rolling road as it needs to be configured at a constant speed.

  • Select AdJUSt calibration
  • After 3 seconds, the display will alternate between "UP" and "dn"
  • Pushing and holding the button when "UP" is displayed will increase the indicated speed reading
  • Pushing and holding the button when "dn" is displayed will decrease the indicated speed reading
  • The speed of change in the display will be slow to start with, but will increase the longer the button is depressed.
  • The calibration is complete when the display changes to the total distance or trip mileage display, this will take around 1 minute from the last time the button is pressed

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