PNI FieldForce Trax - Manual (Page 56)

PNI Sensor Corporation DOC#1016505 r06
TRAX User Manual Page 52
Limited-Tilt Calibration
Recommended calibration method when >5° of tilt calibration is available, but tilt
is restricted to <45°. (i.e. full range calibration is not possible.)
Accel-Only Calibration
Select this when an accelerometer calibration will be performed.
Accelerometer and Magnetic Calibration (110
d
= 6E
h
)
Selected when magnetic and accelerometer calibration will be done
simultaneously.
Below is a complete sample packet to start a 2D Calibration (kStartCal):
Heading, pitch and roll information is output via the kGetDataResp frame during the
calibration process. This feature provides guidance during the calibration regarding
calibration sample point coverage. During calibration, in the kGetDataResp frame,
the number of data components is set to be 3 and then followed by the data
component ID-value pairs. The sequence of the component IDs are kHeading, kPitch
and kRoll.
kTakeUserCalSample (frame ID 31
d
)
This frame commands the TRAX to take a sample during user calibration. The frame
has no payload.
kUserCalSampleCount (frame ID 17
d
)
This frame is sent from the TRAX after taking a calibration sample point. The
payload contains the sample count with the range of 1 to 18.
kStopCal (frame ID 11
d
)
This command aborts the calibration process. The prior calibration results are
retained.
SampleCount#
UInt32
Payload
00 09
Frame ID
0A
ByteCount
00 00
CalOption
(MSBs)
CalOption
(2D Calibration)
00 14 5C F9
Checksum