3
Contents
1 Introduction ................................................................................................... 5
2 Principle of operation.................................................................................... 6
2.1 Acceleration measurement....................................................................... 6
2.2 High pass filter for heave measurement................................................... 6
2.3 Pitch-roll measurement ............................................................................ 7
3 Connections................................................................................................. 10
4 Position ........................................................................................................ 11
5 Outputs......................................................................................................... 12
5.1 Pitch (p).................................................................................................. 12
5.2 Roll (r) .................................................................................................... 12
5.3 Heave and acceleration ......................................................................... 12
6 Platform offset ............................................................................................. 13
6.1 Influence of platform offset..................................................................... 13
6.2 Amount of platform offset ....................................................................... 13
6.3 Platform orientation ................................................................................ 13
7 Transportation ............................................................................................. 14
8 Specifications .............................................................................................. 15
8.1 General .................................................................................................. 15
8.2 Pitch-roll ................................................................................................. 16
8.3 Heave..................................................................................................... 17
8.4 Acceleration ........................................................................................... 18
9 System check and calibration (heave) ...................................................... 19
9.1 Simple System check............................................................................. 19
9.2 Calibration .............................................................................................. 19
10 System check and calibration pitch and roll........................................... 20
11 Alignment................................................................................................... 22
12 Maintenance and repair ............................................................................ 24
12.1 Location of components (see fig. 6 and 8) ........................................... 24
12.2 Humidity ............................................................................................... 24
12.3 Repair and pcb check........................................................................... 26
12.3.1 Repair ........................................................................................... 26
12.3.2 Pcb check ..................................................................................... 27
12.4 Coils ..................................................................................................... 28
12.5 Accelerometer check............................................................................ 28
12.6 Exchange of pcb .................................................................................. 29
13 Check of fluid level.................................................................................... 31
14 Modifications ............................................................................................. 32
15 Dimensions and connections................................................................... 33
Appendix ........................................................................................................A-1
