Calculate the Speed Calibration Values
Raven industries recommends the following values for the initial speed cal:
| Sensor Type Setting | Used with | Recommended Initial Speed Cal | |
|---|---|---|---|
| English | Metric | ||
| Wheel | Wheel Magnets | 1000 | 254 |
| Speedometer Drive Speed Sensor | 612 | 155 | |
| Radar | Raven Radar | 598 | 152 |
| GPS | External Raven DGPS Differential Global Positioning System is an enhancement to standard GNSS/GPS messages to provide better position accuracy. Receiver |
785 | 199 |
| Internal DGPS Differential Global Positioning System is an enhancement to standard GNSS/GPS messages to provide better position accuracy. Receiver |
812 | 206 | |
| GPS Speed over CANbus | 1000 | 1000 | |
These values are usually a good starting point and will generally yield adequate results; however, the speed cal should still be refined for each vehicle.
Note: The GPS speed over CANbus feature is only available with specific Raven speed sense nodes. This feature utilizes NMEA National Marine Electronics Association speed over ground data transmitted over the CAN network which eliminates the need for a separate, external speed sensor.
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When using the GPS speed over CANbus feature, no refining or adjustment is necessary or recommended to the speed cal value. Losing GPS signal for more than a second will also result in loss of the CAN speed signal which may affect product application in progress. |
Refer to the following articles to adjust or tune the speed calibration value, or speed cal, for the specific speed sensor used with the ROS device:
Last Revised: Jul 2024