Jurgen Biggelaar Posted June 26, 2011 Report Share Posted June 26, 2011 Any question there Matt? I'll delete the thread if it was created by accident. Cheers. Jurgen Quote Link to comment Share on other sites More sharing options...
Matt Dunn Posted July 20, 2011 Report Share Posted July 20, 2011 Â A question relating to calibrating a speed sensor. I have a speed sensor calibration number of 191 The Link reads a top speed of 330kmh, where my GPS shows a maximim of 227kmh. Â Is there a maths equation from these number to correctly calibrate the speedo reading? Â Â Â Â Quote Link to comment Share on other sites More sharing options...
Simon Posted July 22, 2011 Report Share Posted July 22, 2011 Calibration Number = (Number of Sensor Teeth / Wheel Diameter) * 31.83. Note that wheel diameter is in meters (m). Quote Link to comment Share on other sites More sharing options...
Jeremy Towers Posted August 1, 2011 Report Share Posted August 1, 2011 Hi Matt If your calibration number is 191 and at 227kph your speed is reading 330kph then alter your cal number to - 191 x (330 / 227) = 277.7  The full calculation for a speed sensor mounted on the gearbox tailshaft. CAL# = pulses per 100m = (Pulses per revolution x 100 x Diff ratio (eg 3.7) ) / wheel Diameter(m) x Pi  For example with 0.7m diameter tyre, 3.7:1 Diff, 4 pulses per revolution sensor CAL# = (4 x 100 x 3.7) / (0.7 x 3.1416) = 673 (pulses per 100m)  You will need to know the pulses per rev from your gearbox though. Google might be the best bet. It is always a round number though.  Jeremy Quote Link to comment Share on other sites More sharing options...
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