Operations Manual Perdix
Manual DocRev B
75
Compass View
90
Calibrate
True North
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Compass
188°
Calibrate
Calibration of the compass may be needed if the accuracy drifts
over time or if a permanent magnet or ferromagnetic metal (e.g.
iron or nickel) object is mounted very close to the Perdix. To be
calibrated out, such an object must be mounted with the Perdix so
that it moves along with the Perdix.
Each battery has its own magnetic signature, mostly due
to its steel case . Therefore, recalibrating the compass when
changing the battery is recommended .
BATTERY AFFECTS THE
COMPASS CALIBRATION
Stay away from metal objects . For example,
wrist watches, metal desks, boat decks,
desktop computers, etc . can all interfere
with the Earth's magnetic field .
Rotate to as many 3D positions as
possible . Upside down, sideways, on
edge, etc .
Compare with another compass
(not a smartphone as those are terrible)
to check your calibration .
TIPS FOR A GOOD COMPASS CALIBRATION
Compare the Perdix with a known good compass or fixed
references to determine if calibration is needed. If comparing
against fixed references, remember to consider the local deviation
between Magnetic North and True North (declination).
Calibration is typically not needed when travelling to different
locations. The adjustment needed then is the True North
(declination).
When calibrating, rotate the Perdix smoothly through as many
3D twists and turns as possible in 15 seconds. Keep metal and
magnetic objects away during calibration. The calibration can
also be reset back to the factory values. After calibration, it is
recommended to compare the compass accuracy with a known
good compass or fixed references
Calibrate
Factory Reset
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Calibrate
Compass Cal.
