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● Installation Procedure
The unit shown in the figure is the NNN-21, which is almost identical to the NNN-31.
1.
Provide a mounting plate as shown below, and secure the sensor unit. Use M10 hex bolts,
washers, spring washers, and nuts to secure it. Tighten the bolt by 3430 N-cm of torque
(350 kg-cm).
When making holes in the mounting plate, beware of bow direction. Excessively long bolts
may reach the sensor unit. For 5 mm (1/5 inch) mounting plate, M10 x 30 mm bolts are just
fit. Using double nuts is also effective to fix plate permanently.
Sensor Mounting
Plate
Mount Hole Dimensions
2.
Use RTV (Room Temperature Vulcanizing) rubber to cover the hex bolts and nuts.
GPS3
BOW
Mount
(Dockyard Supply)
Recommended plate thickness: over 5mm
Apply silicone one-component RTV rubber
Sensor Mounting Plate
Mount
Apply silicone one-component RTV rubber
RTV : Room Temperature Vulcanizing
GPS2
BOW
GPS1
Nut
(SUS)
Spring
Washer
(SUS)
Dock-
Flat
yard
Washer
Supply
(SUS)
Spring
Washer
(SUS)
Hex Bolt
(SUS)
2-7
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