Artemis BP00707, Руководство пользователя

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3.7 Compass Modules
When configuring Artemis prior to a dive, the user can choose between the two
compass options depending on the type of operation required…
3.7.1 Analogue (Magnetic) Compass
For situations that do not require the use of the in-built navigation system, the
Analogue Compass module can be used to provide a simple and robust magnetic
heading for the diver.
Unlike the inbuilt Digital Compass, the Analogue
Compass is not as sensitive to the external
magnetic environment and cannot be calibrated
before use.
The Analogue Compass can be quickly installed
and removed on the Artemis frame, and
secured using the two thumb-screws on either
side of the module.
As the Analogue Compass is mechanical and
contains a magnet, using the Analogue
Compass module at the same time as the
Digital Compass will introduce a directional
error onto the digital reading.
When using the Digital Compass for
navigation, the Analogue Compass module
should be removed from the Artemis
frame.
3.7.2 Digital (Magnetometer) Compass
The Digital Compass is located within the Artemis Console and is used by the
navigation system to determine the diver’s current heading and bearing to swim values
that are displayed on the screen.
The compass is extremely sensitive to surrounding magnetic fields and may need
calibrating before use depending on the background magnetic signature at differing
geographic locations.
For further information on calibrating the digital compass see section 4.8 on page 30.
Based around a magneto-resistive magnetometer sensor, the Digital Compass exhibits
no magnetic signature (unlike the Analogue Compass) making it ideal for use in
environments that are magnetically sensitive or where a fast update rate and high-
accuracy are required.
When using the Digital Compass for navigation, the Analogue Compass
module should be removed from the Artemis frame.