Simrad H1000 manual Key points when installing the rru

h1000 pilot	description/installation
rudder reference unit (rru)

description

The Rudder Reference Unit (rru) is a sealed, high specification potentiometer in a robust casing, providing rudder position information to the pilot computer unit. The operating arm is constructed from aluminium with three positions pre-drilled for the adjustable drag-link. The drag-link has ball-joints at each end which connect the unit operating arm to the tiller arm or steering quadrant. The unit base has four holes to allow for mounting. The unit is supplied with 10m (30ft) of 3-core screened cable.

key points when installing the rru

ξGeneral consideration must be given to the steering system and its geometry before starting the RRU installation. Many factors must be contemplated for a practical solution. The information given here is for guidance only, although where a maximum or a minimum value is given these must be adhered to.

ξMount the rru on a flat surface next to the tiller arm or steering quadrant; construct a small platform if necessary.

ξDo not lengthen the drag-link arm as this can transmit excessive vibration loads to the rru and will invalidate the warranty.

ξThe unit operating arm can be rotated through 360θ; the mid-point of the potentiometer travel is when the operating arm is opposite the cable entry point.

ξWhen the rudder is moved from hardover port to hardover starboard the rru arm should swing through a minimum of 90θ. This will ensure that there is sufficient voltage swing to the autopilot.

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