Calibration - Kongsberg EM 712 Maintenance Manual

2 Measure the relative height of all mounting points on the closest available module
foundation inside the frame.
A Measure points
3 Determine the necessary adjustments to obey the given tolerances.
Note
There is one requirement applicable to the gradient between two adjacent mounting
points and one that applies to the whole array.
4 Apply shims to level out the height differences.
5 Verify that the mounting frame is in plane within the given tolerances.
6 Repeat the procedure until the tolerances are met

Calibration

During the sea trials, calibration surveys are required as described in the EM 712 end
user documentation.
In order to check and verify the performance of the EM 712 system, we strongly
recommend that calibration surveys are done at regular intervals, or prior to any large
survey.
The calibration process is described in detail in the Seafloor Information System (SIS)
Operator Manual.
451106/B
Dimensional surveying and alignment
205