Our Cathodic Protection Survey Systems have been designed using the combined expertise of more than 100 years’ experience in the field. The thousands of pipeline and structural CP surveys conducted over the past 40 years, has resulted in the development of the most reliable & functional, online Subsea CP Inspection Systems anywhere !
The CP-DAS System, installed on an ROV, is used for detailed surveying the condition of offshore pipeline & structural cathodic protection systems. Housed within the robust twin cell contact probe are two high purity Ag/AgCI half-cells allowing not only contact but both continuous potential and field gradient measurements to be taken. Analogue cathodic potential signals are digitised by the subsea electronics pod, rated to seawater depths of up to 3000 metres.
Data transmission is supported via either RS485 or RS232 protocols.
With selectable logging speeds of up to 10 samples /second, with dual backup included, each individual CP/FG sample collected is uniquely correlated to a date timestamp & KP position when linked to the survey computer. The received data can also be output to 3rd party overlay.
Data is processed using ISES developed advanced analysis reporting and charting suite which forms the basis of comprehensive CP survey reports.
With suitable offshore communication protocols in place, remote operations are possible with the CP survey data being operated onshore reducing the requirement for personnel to be present on the vessel.
The STABCON II+ system represents a simple to use package specifically designed for 3rd party use to undertake CP and Field Gradient Mapping. The Contact CP probe comprises a tough Delrin body with a large stainless stab tip specifically designed to enable reliable contact through marine growth and anode oxide layers. The Ag/AgCl (silver/silver chloride) electrode, housed within the probe body itself, consists of a high-purity, long-life Silver/Silver Chloride electrochemical reference electrode. The probe is designed to measure the potential difference in volts or millivolts between the contacted metal surface (via the contact tip) and the Silver/Silver Chloride electrode. The contact probe is designed to be ROV mounted and comes with a 5-pin wet-mateable connector together with an analogue to digital pressure housing.
Our simple, easy to install free STABCON II+ software utility can then be used to interrogate the encoded information from the ISES subsea digitiser. This information can be displayed live on either a PC or laptop and can also be exported to an external unit (eg video overlay) or stored as unique time stamped ASCII data files
The software automatically calculates and subtracts the probe cell vs remote offset, following each contact. A live display and capture of CP potential contact measurements made on subsea metal surfaces (eg steel, anodes) is also available.
With the CP-DAS twin cell probe, contact potential, continuous monitoring and electric field gradient data, can all be captured from a single multi-functional unit.