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Laser Rangefinders I<br />

I.2.5 Using the Criterion with the Asset Surveyor Software<br />

As mentioned previously, the practical accuracy of the fluxgate<br />

compass in typical field trials is around ±1–2°. This yields a steady<br />

reduction in accuracy as the distance between the laser and a target<br />

point increases. At a distance of 100–200 m, the average positional<br />

error when using the Criterion rangefinder is approximately 2 m (in<br />

addition to the error of your GPS measurement).<br />

Testing<br />

When you first connect the Criterion 300 or 400 to your <strong>Trimble</strong> GPS<br />

system, test that it is correctly configured and that all components are<br />

working correctly.<br />

The best way to achieve this is using the External sensors entryinthe<br />

Asset Surveyor software’s Configuration menu:<br />

TSC1 Asset Surveyor Operation Manual 321

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