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Table 7-5: Sample Points
Number of Samples
Calibration Mode
Allowable
Range
Minimum
Recommended
Full Range
2D Calibration
Limited Tilt Range
Hard Iron Only
Accelerometer Only
Accel and Mag
10 to 32
10 to 32
10 to 32
4 to 32
12 to 32
12 to 32
12
12
12
6
18
18
kUserCalAutoSampling (Config. ID 13d)
This flag is used during user calibration. If set to TRUE, the module automatically
takes calibration sample points once the minimum change requirement is met. If set
to FALSE, the module 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 14d)
Baud rate index value. A power-down power-up cycle is required when changing the
baud rate.
kMilOutput (Config. ID 15d)
This flag sets the heading, pitch and roll output to mils. By default, kMilOutput is set
to FALSE and the heading, pitch and roll output are in degrees. Note that 360
degrees = 6400 mils, such that 1 degree = 17.778 mils or 1 mil = 0.05625 degree.
kDataCal (Config. ID 16d)
This flag sets whether or not heading, pitch, and roll data are output simultaneously
while the TCM is being calibrated. The default is TRUE, such that heading, pitch,
and roll are output during calibration. FALSE disables simultaneous output.
kCoeffCopySet (Config. ID 18d)
This command provides the flexibility to store up to eight (8) sets of magnetometer
calibration coefficients in the module. The default is set number 0. To store a set of
coefficients, first establish the set number (number 0 to 7) using kCoeffCopySet, 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.
PNI Sensor Corporation
TCM User Manual – June 2011
DOC#1014688 r05
Page 45