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I Laser Rangefinders
C
C
The maximum declination permitted by the Criterion laser
rangefinder is 30°.
5. Press ENTER to finish entering the declination.
6. Press EXIT twice to return to the Criterion’s main menu.
Warning – You probably want to use the Criterion laser rangefinder
separately from your TSC1 datalogger. If so, you probably want to
configure the laser’s DECLINATION so that the bearings displayed by the
Criterion are relative to true north. If you do so, you must set the Asset
Surveyor software’s Magnetic declination field to 0°, toavoidthe
declination being applied twice. If you use your Criterion laser rangefinder
exclusively with the TSC1 datalogger, it is best to leave the laser’s
DECLINATION set to 0 and modify the Asset Surveyor software’s
Magnetic declination field; this enables the Asset Surveyor software to
correctly convert other magnetic bearings to true north (for example, when
navigating, checking the positions of satellites, and so forth).
Warning – If you specify a local declination offset, you must make sure
that you clear or re-specify this offset when you move to a new location.
Ensuring accurate heights
When you take a shot to a target point with the Criterion laser
rangefinder, the rangefinder generates a three-dimensional offset to
that target. This is used, in conjunction with a three-dimensional GPS
position, to compute the position of the target in three dimensions. In
order to obtain an accurate height for the target point, your configured
antenna height must take account of the difference between the height
of the GPS antenna and the height of the laser rangefinder.
320 TSC1 Asset Surveyor Operation Manual