Way Ahead In Corrosion Control

Deep C Meter

Polatrak® cathodic protection survey system for ROVs

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The Deep C Meter™ is the premier ROV cathodic-protection survey system for use in deep water.

The Polatrak® Deep C Meter™ is designed for rugged service on a work-class ROV. Each unit is built and tested in Deepwater's Houston manufacturing facility.

The Deep C Meter 3000 AD™ is the premier ROV cathodic‐protection survey system for use in deep water. The unit can integrate fully with ROV systems for power and data transfer, or it can operate as a visual inspection unit with no interface with the ROV umbilical. It's designed for rugged service on a work‐class ROV at water depths up to 3000 meters (10,000 feet). The unit can integrate fully with ROV systems for power and RS‐232 serial data transfer. The ROV‐II™ contact probe (included) is mounted on a convenient, shock‐absorbing T-handle. In addition to the digital data stream, the always‐on display allows survey teams to operate even when serial communications are not available. The display brightness can be remotely adjusted in real‐time to accommodate a variety of lighting and camera conditions.

The optional electric field gradient (EFG) probe enables any AD series meter to detect electric currents in seawater, allowing touchless measurement of anode activity.

Accurate video and digital output

The Deep C Meter 3000 AD™ provides real‐time data through three LED displays and a continuous RS232 (standard ASCII string) digital feed. The included Survey™ software makes planning, executing and reporting a CP survey much more reliable, convenient and precise than ever before. Having a visual backup of the data provides more confidence during the survey and an easy way to double‐check your results when you return to shore.

Works with ROV power

The Deep C Meter 3000 AD™ is 24V DC ROV powered, which eliminates the need to open the pressure housing to change batteries and replace O‐rings. Cabling can be interfaced with the ROV either through a splice or oil‐filled cables.

Stand-alone version available

We also offer the Deep‐C‐Meter 3000™ unit, which is a battery powered version that does not interface at all with ROV systems. All readings are taken from the subsea readout via the ROV camera. Upgrade kits for these non‐AD units are also available.

Pipeline survey modes

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Stab Survey

The stab survey method records the actual steel potential with periodic stabs every 1 - 3 km. The potential between stabs can be accurately calculated with pipeline attenuation modeling. Deep C Meter ™ software in Stab Survey mode records events and exports a completed survey for the engineers to model.

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Remote Electrode Survey

The remote electrode method calibrates a remote reading with periodic stabs of bare steel along the pipeline. The data is then aligned in post processing. Not as accurate as a stab survey, but required in some regions. Deep C Meter™ software in Remote mode outputs stab events and the complete set of readings from the proximity electrode for processing.

Models

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Deep C Meter™ 3000 AD

ROV interface RS232/485 / ROV powered / Software & visual display / 3000 m

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Deep C Meter™ 3000 EFG

ROV interface RS232/485 / ROV powered / Software and visual display / 3000 m / Field gradient probe

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Deep C Meter™ 3000

No ROV interface / Battery powered / Visual display / 3000 m

Specifications

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Key Items

Electrode elements
2 X Ag/Agcl sealed
Depth
3,000M
Method of Deployment
ROV
Reading type
Proximity, contact and field gradient
Readout
Deep C Meter™, Rs 232 485 Via Survey™ software

Technical Datasheet

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Polatrak® online store

Shop online for all Polatrak® instruments for divers, ROVs and topside deployment with details about kit contents, spare parts, service, rental information and more.

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Deep C Meter gallery

Survey software

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Survey is designed to make cathodic protection surveys quick and easy and is included free with every Deep C Meter™ 3000 AD purchased. The software can work in multiple modes to support any survey requirements:

Traditional stab + EFGThe ROV take stabs and EFG readings, but no remote electrode readings.

Remote electrode – > Remote electrode ‐ The ROV takes stabs and EFG readings. In between stabs the ROV also takes remote variance measurements with a remote electrode deployed over the side of the vessel or attached to the ROV’s TMS.

Swain™ meter mode – For use with the underwater clamp‐on ammeter.

Features include:

Import telemetry data: Import ANY data‐stream to be recorded in the software alongside the CP readings (telemetry, etc.)

Remote variance: Virtual potential in real‐time (last calibration + remote variance), just like other survey systems (NOTE: this reading is not an actual CP potential)

Time machine module: Allows the user to select any data point from the last 30 seconds (data sampling rate: 2 per second). No more clumsy button pushing at the moment of stab.

Pre-load survey: Pre‐loaded event comments allows you to enter stab locations and survey points customized to your assets ahead of time. Just tick them off as you survey.

Logs continuously: 100% logging all the time (while the software is on, data is being recorded) – no chance for user error.

CSV Output: A quick .csv output of event log (stabs, spot readings) allows for stab surveys to be completed during on the boat.

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