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    • 1.7.

      Junction Box Connector E

      • 1.7.1.

        High Speed Suspension Sensors (LF, RF, LR, RR)

If you have purchased suspension sensors, then you should have all necessary hardware for these sensors. Note that DATAPRO-45™ records these sensors at 600 samples per second rather than the typical 100.

For each sensor, connect the black ground wire, red power wire, and white signal wire to the appropriate group of three positions on junction box connector E such as E1, E2, and E3. Note that some sensors may be provided with an extension cable and this cable may use different color codes, so please check the documentation that comes with your sensor. Note also that the +5 Volt position is not actually a “power” connection. Instead, it is a “reference voltage” which the suspension sensor uses to divide down and produce a signal corresponding to suspension deflection.

TESTING: Change the LCD display channel to one of the four suspension channels (“Left Front”, “Right Front”, “Left Rear”, or “Right Rear”). Bounce the suspension up or down and verify that the reading changes. It is advisable to attempt to deflect just one sensor in a noticeable fashion in order to make sure that you don’t inadvertently have any sensor cables crossed. Calibration

The factory calibration inside your DATAPRO-45™ for suspension sensors is a double ended range from -100.0 to 100.0, intended to represent percent deflection up (+) or down (-). Depending on your installation, there may be three ways in which the LCD readings differ from ideal. You may use the DATAPROON-LINEsoftware to customize the calibration for your installation. For details on this feature, see the on-line software help. This process is very similar to adjusting the throttle position sensor readings.

1. Up and down, plus and minus may be reversed. coefficients.

Simply negate all calibration

2. The reading may not be zero when the suspension is at rest. Make a note of the digits displayed instead of zero. For example, if 12.7 is displayed (a little more than ten), then note the digits 127 (a little more than 100). Multiply this number by 65,536 and then subtract it from the C coefficient. Note that if the display was a negative number, then you need to subtract a negative number, which is tantamount to adding









3. The reading change under full deflection is not 100.0. Make a note of the deflection from rest. Be sure to take into account any difference in the at-rest position from zero. For example, if 12.7 is displayed at rest and 85.4 is displayed at full deflection,

Copyright 1999 Computech Systems Inc


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