Spectra Precision ProMark Field Software - Manual (Page 67)

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E-Compass & External Device
Enabling/Disabling
the E-Compass
• Tap Menu>Options.
• Tap on the right-arrow button several times until you
unveil the E-compass tab.
• Tap on the E-compass tab.
• Set the Use electronic compass to determine orientation
button to enable or disable the E-compass. The compass
calibration is described in the section below.
Calibrating the E-
Compass
Calibrating the E-compass is a two-step process during which
you are asked first to rotate the receiver anticlockwise in
horizontal position and then turn the unit upside down until
a beep is heard.
This procedure should be run with the receiver powered from
its internal batteries rather than an external power source.
• Tap on the Calibrate button.
• Read the instructions and then tap on the Start button.
• Wait until the arrow outside of the compass starts rotating
slowly clockwise. Rotate the receiver anticlockwise in
order to maintain the arrow in your direction. You will have
to perform three to five rotations until the inside of the
compass is completely dark blue. Try to be as accurate as
possible as this will speed up the calibration process.
Note that the arrow momentarily stops every 30 degrees or
so before continuing its rotation.
• When the inside of the compass is all dark blue and after
the arrow has come back to the South direction, a
message asks you to proceed with the last step of the
calibration.
• Tap ok in the message window and turn the receiver
upside down on a horizontal surface. Wait a few seconds
until a beep can be heard.
• Put the receiver the right way up. A message on the screen
indicates that the calibration is complete and successful.
• Tap ok in the message window. This takes you back to the
E-compass tab of the Options screen.
• Tap OK to return to the map screen.