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PNI Sensor Corporation DOC#1016505 r06

TRAX User Manual Page 17

Table 5-3: 12 Point 2D Calibration Pattern

Sample #

Yaw

Pitch

Roll

0°

30°

max. negative

60°

0°

90°

max. positive

120°

0°

150°

max. negative

180°

0°

210°

max. positive

240°

0°

270°

max. negative

300°

0°

330°

max. positive

Footnote:

1. For best results, the tilt experienced during calibration should match that experienced

in service. For example, if the TRAX is restrained to a level plane in service, then

calibration should be in a plane, where “max. positive” and “max. negative” are 0°.

5.1.3 Limited-Tilt Calibration

A Limited-Tilt Calibration is recommended when 45° of tilt isn’t feasible, but >5° of tilt

is possible. It provides both hard-iron and soft-iron distortion correction. The

recommended 12 point calibration pattern given below is a series of 3 circles of evenly

spaced points, with as much tilt variation as expected during use.

Table 5-4: 12 Point Limited-Tilt Calibration Pattern

Sample #

Yaw

Pitch

Roll

First Circle

0°

90°

0°

180°

0°

270°

0°

Second Circle

45°

> +5°

135°

> +5°

225°

> +5°

315°

> +5°

Third Circle

45°

< -5°

135°

< -5°

225°

< -5°

315°

< -5°

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 61 62

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