Operation
Copyright © 2015 Coda Octopus Products Ltd
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F180R MOTION Sensor User and Reference Guide
There is no power to the system or the
system power supply has failed
The 5V power supply for the system is active
The system is outputting data on J2
4.3
Calibration
Measurements made describing the system and antenna relationship and input into the
software during the configuration process provide an important starting point that the system
uses to initialise during its first operation.
Optimal system accuracy can be achieved only after you have made a series of calibration
manoeuvres. These manoeuvres allow the system to identify and evaluate the three separate
factors that go towards generating the system output. These factors are:
rapid linear and rotational movements caused by intended and imposed vessel motion
slow linear and rotational movements as the earth rotates
slow apparent linear and rotational movements caused by inevitable and unavoidable
drift in the accelerometers and rate sensors.
A special software algorithm operating in the F180R System allows it to separate out these
independent signals when you impose a series of dynamic and rapid manoeuvres on the
system after installation.
4.3.1 Pre-Calibration Checks
Ensure the F180R System has been powered–on for 30 minutes from a cold start — it is not
necessary to wait 30 minutes from a system restart — to allow the sensors inside the unit to
reach a stable operating temperature. This precaution will increase the accuracy of the
calibration you obtain.
It is recommended to carry out a GNSS satellite constellation prediction for the planned
timeframe before starting the calibration. The F180R System system will still commence it's
built-in calibration routines, but the routine might not complete until sufficient satellite
constellation is restored. This is especially critical when surveying in high latitudes as well as
in environments where signal obstructions might be a problem.
Check that you have entered the required information in the MOTION Settings Wizard:
Antenna Separation
Primary Antenna Mounting
Secondary Antenna Mounting
Correction Type
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