Compass And Levels - Javad TRIUMPH-LS User Manual

Compass and Levels

Calibrate the compass and levels periodically. When
calibrating the levels, the unit only needs to be held within
5 degrees of level; the internal three-axis accelerometer
calibration software will take care of the rest. Levels are
temperature dependent, and should therefore be calibrated
at the temperature of the environment the unit will be used
in.
Electronic compass works only in magnetically uniform
environment. Move any electronic compass around your
computer, for example, and its direction may change by 180
degrees. Calibrate compass in the area that you are going
to use. Make sure that your environment is uniform enough
for using electronic compass. Move around and see if its
reading changes substantially.
Compass does have tilt compensation, but it is better to
hold the unit level when using compass to remove the need
for compensation.
CAUTION: Electronic compass works in uniform
electromagnetic environments only. Try the one in your
phone and move it around in your office. It changes by
180 degrees when you pass the power supply of your
computer, or your office phone. Rely on compass in uniform
electromagnetic environment and calibrate it there. This
is nothing unique to TRIUMPH-LS. Try many other types.
Mechanical compass are also somewhat sensitive. Move
them around and see.
154 www.javad.com
Terms & Concepts