PNI FieldForce Trax - Manual (Page 48)

PNI Sensor Corporation DOC#1016505 r06
TRAX User Manual Page 44
Table 7-4: Sample Points
Calibration Mode
Number of Samples
Allowable
Range
Minimum
Recommended
Full-Range 10 to 18 12
Limited-Tilt 10 to 18 12
2D Calibration 10 to 18 12
Hard-Iron-Only 4 to 18 6
Accelerometer-Only 12 to 32 18
Mag-and-Accel 12 to 32 18
kUserCalAutoSampling (Config. ID 13
d
)
This flag is used during user calibration. If set to TRUE, the TRAX automatically
takes calibration sample points once the minimum change and stability
requirements are met. If set to FALSE, the device waits for kTakeUserCalSample
to take a sample with the condition that a magnetic field vector component delta is
greater than 5 µT from the last sample point. If the user wants to have maximum
control over when the calibration sample point are taken then this flag should be
set to FALSE.
kBaudRate (Config. ID 14
d
)
Baud rate index value. A power-down, power-up cycle is required when
changing the baud rate.
kMilOut (Config. ID 15
d
)
Sets the output units as mils (TRUE) or degrees (FALSE). The default is FALSE.
kHPRDuringCal (Config. ID 16
d
)
This flag sets whether or not heading, pitch, and roll data are output
simultaneously while the TRAX is being calibrated. The default is TRUE, such
that heading, pitch, and roll are output during calibration. FALSE disables
simultaneous output.
kMagCoeffSet (Config. ID 18
d
)
This command provides the flexibility to store up to eight (8) sets of
magnetometer calibration coefficients in the TRAX. The default is set number 0.
To store a set of coefficients, first establish the set number (number 0 to 7) using
kMagCoeffSet, then perform the magnetometer calibration. The coefficient
values will be stored in the defined set number. This feature is useful if the
compass will be placed in multiple locations that have different local magnetic
field properties.