TMQ AP4 - Installing a Compass-Top Sensor

TMQ AP4 Autopilot (AP4S10) 24 of 62 Version 4.96 9/10/2017
Installation of the magnetic Compasses
There are two other types of compass which may be supplied for this autopilot.
A compass-top sensor (TMQ CTS), or a magnetic sensor unit (TMQ fluxgate
compass - COMMAG),
Wiring
The magnetic sensor unit or compass-top-sensor, which is supplied with your
AP4 autopilot, is fitted with a plug, which fits into the COMPASS socket on the
rear of the autopilot. If the cable must be extended, we recommend that TMQ 5-
core shielded extension cable be used. This is available from your supplier or
TMQ Electronics.
Installing a Compass-Top Sensor (CTS)
A compass top sensor should be used as the heading reference unit for steel
boats. Before attaching the CTS to the top of a flat top compass, ensure there
are no defects in the compass, eg: sticking card, as this will affect the operation
of the autopilot.
Position
 Firstly determine the correct position of the CTS on the compass glass
top (CTS is central and cable facing aft)
 Route the cable to the AP4 control unit position
 Plug cable into AP4 compass socket
 Before fixing the CTS to the compass surface, switch on the AP4, align
the CTS carefully so that the AP4 display reads the same as the boat
magnetic compass
 When position is correct attach the CTS with double sided tape