Troxler Enhanced RoadReader Plus 3451 Manual Of Operation And Instruction page 201

Error! Turning off GPS.
This error can occur when turning off the GPS.
Possible causes:
✓ PDA is not within 4.6 m (15 ft) of the gauge.
✓ Object in the way of the transmitter/receiver.
Invalid Code Entered
This error will occur if an illegal or invalid code is entered while
trying to change the operator code.
Invalid density value. Try again!
This error can occur if the operator enters an invalid density value
while performing a special calibration. The value must be greater
than 0.
Invalid percent moisture value entered!
This error can occur if the operator enters an invalid moisture offset
from the keypad menu selection. The value must be between 1 and
99.
Invalid thickness entered!
This error can occur if the operator enters an invalid thin layer
thickness while performing a thin layer special calibration.
Legitimate rod depth not entered!
This error can occur if, while performing a special calibration, the
operator enters an invalid source rod depth to store this calibration
position.
Math error encountered in thin lift calibration!
Calibration aborted.
This error can occur after taking a reading (count) in the thin layer
calibration mode.
Possible causes:
✓ Counts received are not valid.
✓ Depth strip was in an improper position (Manual mode).
Appendix C–18