PNI FieldForce Trax - Manual (Page 34)

PNI Sensor Corporation DOC#1016505 r06
TRAX User Manual Page 30
in a particular section can result in a poor score. Distribution is not calculated for an
Accelerometer Calibration.
Tilt Error
Indicates if the TRAX experienced sufficient tilt during the calibration, taking into
account the calibration method. The score should be 0. Tilt Error is not calculated
for an Accelerometer Calibration.
Tilt Range
This reports the larger of either half the full pitch range or half the full roll range of
all sample points. For example, if the TRAX is pitched +10° to -20º, and rolled +25º
to -15º, the Tilt Range value would be 20º, as derived from [+25º - {-15º}]/2. For
Full-Range Calibration and Hard-Iron-Only Calibration, this should be ≥45°. For 2D
Calibration, this ideally would be ~2°. For Limited-Tilt Calibration the value should
be as large as possible given the user’s constraints. Tilt Range is not calculated for an
Accelerometer Calibration.
Mag Factory Reset & Accel Factory Reset
Clicking the Mag Factory Reset and/or Accel Factory Reset will reset the calibration
coefficients to those established at PNI. Note that the mag factory coefficients will
not take into account magnetic influences inherent in the host system, which could
result in very large heading errors. And the accel factory coefficients will not correct
for accelerometer drift, which may become significant over an extended period (6 –
12 months, typically). If either of these Reset buttons are selected, it is necessary to
click or to have the factory coefficients take effect.
6.6 Test Tab
The Test Tab is used to demonstrate and evaluate the performance of the TRAX. The
Heading, Pitch, and Roll are output during testing, as well as the Heading Status.
The Heading Status provides an indication of the accuracy of the heading. A green box
represents a heading accuracy of <2°, a yellow box means the heading uncertainty is
approximately 2° to 10°, and a red box means the uncertainty is >10°. These heading
uncertainties assume the TRAX was properly calibrated in a clean magnetic environment.