2 – Installation
DPN 402197 Issue 7.1
© Teledyne Limited
2- 7
It is not possible to predict how the measurements will degrade when any of these
effects is present. To help avoid these effects, mount the coil triads at least
0.5 metres from the ROV body.
CAUTION
The coil triads are heavy. Ensure the mounting arrangements provide a rigid and
sturdy support to prevent the array moving or vibrating independently of the ROV.
To avoid personal injury, always use help when you lift or move the assembled coil
array.
Mount the coils on the front of the ROV at a height that protects them from
collision damage without degrading their vertical detection range. Typically, they
will be approximately one metre above the lowest point on the ROV. Allow a
minimum distance of 0.5 metres between the coil triads and the ROV body.
The 350 system is shipped with a 2 metre long mounting bar (
). There are flat surfaces
machined into it that extend for a distance of 500mm from both ends so that, in these areas, the bar
has an octagonal cross-section.
The bar has a receptacle groove 170mm long machined at the centre of one face. Make certain this
receptacle is at the bottom when you install the bar onto the ROV. The receptacle is there to accept a
Teledyne TSS altimeter if one is being used.
Figure 2-4: Coil array mounting bar
The following are also provided:
❐
Two clamping blocks identical to those used in the coil assembly (item
B
).
❐
Eight M8 × 50mm A4 stainless steel bolts (item
F
Coil mounting method:
Note that when properly mounted both coil triads have:
❐
Their vertical coils towards the front of the ROV, with their connectors at the top.
❐
Their fore-aft coils farthest from the ROV centre-line with their connectors pointing towards the
rear.
❐
Their lateral coils in the top groove of the centre block, with their connectors pointing inboard.
1. Use stainless steel U-bolts to attach the mounting bar to the front of the ROV. Adjust the
mounting bar until it is level and centred relative to the ROV. Tighten the U-bolts firmly to stop
the bar moving or vibrating during survey operations.
