User's Manual

12-Locate & Mark Mode Noggin
54
12.1.7 Odometer Calibration
The odometer is factory calibrated but should be periodically calibrated for positional accuracy.
To calibrate the odometer, follow the steps as they appear on the screen:
1) Select the length of your odometer calibration distance: 1, 5, 10 or 20 meters or 3, 10, 30 or 60
feet (depending on the units (12.1.3: p.52). The default length is 10 meters or 30 feet. Set the
GPR system at the starting position and press ‘8’.
2) Move the system the calibration distance; a red line rotates as you move to indicate that the
odometer is turning. Then press ‘8’.
3) This screen displays the new and old calibration values. Press ‘8’ to accept the new calibration
value or press ‘1’ to cancel out of the calibration and use the old value.
The odometer calibration in Locate & Mark mode can be different than the odometer calibration
in Survey & Map mode (13.5.2: p.120).