Raymarine Compass Instrument ST40 - Manual (Page 25)

16 ST40 Compass Instrument Owner’s Handbook
76 mm (3 in)
76 mm (3 in)
D729-6
If you are not sure of the magnetic suitability of the chosen location,
carry out a survey of the site as follows:
1. Temporarily fix a simple hand bearing compass at the intended
location.
2. Swing the vessel through 360° while at the same time observing
differences between the hand bearing compass and the vessel's
main steering compass.
3. If there are no differences, greater than 10° on any heading, then
the site is suitable for the Fluxgate Compass transducer.
Using the self-tapping screws provided, mount the Fluxgate Compass
transducer vertically on a suitable bulkhead, so that the connecting
cable is downmost.
Running transducer cable
Observing the following guidelines, run the transducer cable to the
instrument:
• If the cable has to be fed through the deck, always use a good quality
deck gland.
• Where cables are fed through holes, always use grommets to prevent
chafing.
• Secure long cable runs so they do not present a hazard.
• Wherever possible, route the cable away from fluorescent lights,
engines, radio transmitting equipment, as these may cause
interference.
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