Calibration

Depth Calibration

The depth reading should be reset to zero (0) before every dive. To do this, set the ROV down outside of the water and navigate to MENU → CALIBRATE → CALIBRATE DEPTH and press ENTER. 

Gyro Calibration 

The gyro will come calibrated from the factory. Gyro re-calibration is recommended seasonally, annually or if the ROV has undergone a change in water temperature. For highest accuracy of the gyro when operating in Gyro only mode, it is recommended to re-calibrate every dive and in the temperature that you will be operating.

To re-calibrate the Gyro, follow the steps below 

• Place the ROV on a flat surface un moving surface. (On a boat or moving platform is not recommended)

• Navigate to MENU → CALIBRATION → COMPASS HEADING → GYRO CALIBRATION

• Select START CALIBRATION then CALIBRATE

• Leave the ROV untouched while it determines its new Gyro bias

• Select ACCEPT

IMU Calibration 

The imu is calibrated from the factory. IMU re-calibration is recommended once every ~2 years of operation or if the ROV has undergone a large change in water temperature. 

To re-calibrate the IMU, follow the steps below 

• Place the ROV on a flat surface un moving surface. (On a boat or moving platform is not recommended)

• Check both axes of the ROV using a level to ensure the ROV is completely flat

• Navigate to MENU → CALIBRATION → COMPASS HEADING → IMU CALIBRATION

• Select START CALIBRATION then CALIBRATE

• Leave the ROV untouched while it determines its new accelerometer bias

• Select ACCEPT

Magnetic Calibration

Both types of sensorpod will require magnetic calibrations, however there are different requirements for the two types as well as different procedures. Follow the steps below for your appropriate sensorpod.

Sensorpod+

The Sensorpod+ is our most accurate sensor pod and therefore requires a more in depth calibration.

Download the guide below as well as the calibration software to perform the magnetic calibration.

Standard Sensorpod

The standard sensorpod should only need to be calibrated annually or whenever errors are noticed.

To calibrate the sensor pod follow the steps below:

• Navigate to MENU → CALIBRATION → COMPASS HEADING → MAGNETIC CALIBRATION

• Select START CALIBRATION

• Read the on-screen instructions then press CALIBRATE

• Rotate the ROV in every possible direction and orientation until the calibration score reaches above 95%. This can be done in water using the ROV’s thrusters or on-land by hand. Ensure that you are in this calibration mode for approximately one minute. Performing this calibration too fast will result in a bad calibration.

• Press FN + Enter at the same time to end calibration mode, then press ACCEPT

Heading Offset

Due to changing magnetic fields in different geographical locations a magnetic declination must be applied to the magnetometer bias. This process is done automatically when auto heading offset is selected in the heading menu and a GPS coordinate is provided either statically or from a GPS source.

If operating the ROV in a structure using architectural blueprints for reference, you may want to use a True heading (direction relative to True north) instead of a Magnetic heading. To change this, follow the steps below:

• On the controller, navigate to Main Menu → Calibration → Compass Heading

• Select SET HEADING WITH ROV, point the ROV in the direction of True north and press ‘Confirm’