The OceanTools Digital Cathodic Potential measurement system is a peripheral that can be used with the Blueye X3 to monitor and assess corrosion on subsea metal structures.
The system uses a millivoltmeter to indicate whether a structure is corroding or partially or fully cathodically protected.
Live readings are displayed in the Blueye app, and measurements are logged in the drone so they can be overlayed on video recordings and still pictures and downloaded as a CSV file. The readings in the app will change color based on the severity of the readings based on the recommendations from the probe manufacturer (see Buckley information sheet).
Calibration instructions and maintenance routines can be found in the attached user manual.
How to install
If your drone has a front piece with two mounting holes and a pre-assembled probe, you can skip to the "Communication cable" step.
Begin the installation by removing the side covers. First, remove the back piece, then loosen the three side cover screws with the 3mm Allen key from the Blueye repair kit.
Once the front is loose, install the supplied front piece with two holes by fastening the same four screws you just removed. NB! Only tighten them "hand tight" as they are self-threading screws.
Assembling the probe
Gather the white probe, the probe mount, and two screws. Insert the white probe into the black mount and tighten down the two screws, as shown in the pictures below.
The DigiCP is compatible with all Guest Ports (GP1, GP2, GP3).
Begin the installation by removing the side cover of the drone. Remove a buoyancy element and plug the GP connector into an available connector. We recommend using GP1 to make the cable routing as easy as possible.
The cable is routed alongside the drone and below the ballast plates. Leave the cable out while we continue assembling the DigiCP converter.
Attaching the DigiCP converter
Grab the circular metal box, the two black U-shaped mounts, and the six short screws.
Attaching the probe
Gather the assembled probe and the two long screws.
How to use
While diving, the Blueye App will show the readings from the CP probe will automatically show in the bottom center of the screen. The CP readings are displayed in the app and colored according to Buckleys guidelines.
To display the CP measurements in the video recording, you have to turn on the video overlay in the setting menu and press the record button or (X) when in-dive.
Align the probe to the surface you want to measure, and live thickness readings are displayed. A value is only displayed when it is verified with Triple Echo Verification. When a value is not verified, but the probe is measuring echoes, it will be shown as dashes.
To capture a still picture of the measurement, hold (LB) or (RB) while pressing (X). The still images will save the CP data within its meta-data, which is then added to the picture overlay.
The measurement data can also be downloaded as a CSV file from the drone.