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7. BASIC OPERATION
The onboard electronic compass was calibrated before being shipped from the factory. A function
within the compass will automatically perform any necessary calibration in response to changes in the
magnetic field. Although this function by itself is sufficient in normal situations, when the Remote
Controller becomes highly magnetized, manual calibration is necessary.
• When the power is ON, automatic calibration is performed to adjust for changes in temperature and
magnetic field. When transporting the Remote Controller, with the power still ON, using modes of
transport such as cars or trains which contain a large amount of magnetic substance (iron, magnets
etc.), this function will calibrate for the magnetic field of said car or train. As a result, the direction in
which the Remote Controller instructs a rotation in subsequent surveying tasks may not be correct.
Always turn the power OFF when transporting.
• Manually calibrate the compass in the event that the Remote Controller has been transported with
the power still ON and the resulting calibration inaccuracy persists.
• The ideal location for performing manual calibration would be an open area clear of any objects.
Failing that, make sure that the surrounding area (i.e. several meters around the instrument
including ground level) is clear of metallic objects (desks, steel frames, etc.) or devices containing
magnets.
• Hold the Remote Controller on the pole at a height of at least 1m.
• Avoid physical contact with metallic objects (cellular phones, tape measures, etc.) or magnetic
objects (such as magnetic necklaces) while performing manual calibration.
PROCEDURE Checking whether manual calibration is necessary
1. Press the POWER button to switch ON
the Remote Controller. ● POWER is Lit.
If ● FAR and ● SEARCH flash and a rapid
error tone sounds repeatedly, relocate to a
position several meters away from metallic
objects (desks, steel frames, etc.) or devices
containing magnets before trying again.
If the audio tone continues to sound even after
changing location, manual calibration is
necessary.
Port
Control panel status
Lit Flashing
COM1
(total station)
Comm OK
Searching for total
station
COM2
(data collector)
Comm OK
Data collector is
searching for Remote
Controller
7.5 Calibrating the Electronic Compass
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