Ranger HRC™ operator´s manual – System software
82 Publ. No. TM 614 006 699 Rev B – ENGLISH (EN) – Oct 30. 2008
NOTE: The IR Camera shall be turned off before the DMC calibration starts, since it may
interfere with the magnetic measurements.
Figure 7.36 DMC Calibration mode dialog box.
DMC Calibration mode dialog box
Feature Description
Magnetic north
reading
The Magnetic north reading item displays the magnetic north reading repor-
ted by the DMC unit.
True north
correction
The True north correction feature is used to enter a known deviation
between magnetic north and true north. A negative number corrects towards
west and a positive number towards east.
NOTE: The True north correction value has to be entered before the
calibration is started.
Calibration score The Calibration score indicates the quality of the measurement. A poor
score is an indication of magnetic interference, for example iron, vehicles,
transformers or power lines.
• Horizontal: Shall ideally be 9, on a scale from 0 to 9.
• Vertical: Shall ideally be 9, on a scale from 0 to 9.
• Mag. of local eld: Shall be low, on a scale from 0 to 100.
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