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Offshore Structure Protection >
Monitoring Equipment for
Cathodic Protection
Polatrak
Deep-C-Meter™
Deep Sea Cathodic Protection
Survey System for ROV's
By Deepwater Corrosion
Services
The premier ROV cathodic protection survey system
for use in deep water
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Polatrak Deep-C-Meter with
ROV II probe
mounted on T-Handle. |
Polatrak Deep-C-Meter
in rugged field case. |
Product Overview
The Polatrak Deep-C-Meter is
designed for rugged service on a work-class ROV. With 316 SS pressure
housing and a fully articulating mount, this system can go to work
out-of-the-box on cathodic protection survey projects down to 3000 m
(10,000 feet). The Deep C Meter is self-contained, which means that
there is no interface with the ROV umbilical. Just point a camera at the
readout, grab the probe in the manipulator, and start to record accurate
CP data from the LED readout. The Deep C Meter kit includes the ROV II
Probe, articulated mount and all standard replacement parts.
Rated for operation in up to 10,000
feet (3000 m) depth, this is the most widely used system of its kind
worldwide. The instrument readout unit can be conveniently mounted
anywhere on the ROV while the probe unit is held in the tee-handle
manipulator mount.
Key design
points
- Self-contained:
Since no interface to the ROV
umbilical system is required, the Deep C Meter system can be installed
quickly and easily on the ROV anywhere in view of the camera.
- Accurate video data recording:
As all data are recorded on the video display, there is no need to
record the data in the field via traditional means, which subsequently
eliminates human error. Someone onshore can interpret the data from the
tape, after the survey is complete. And like all Polatrak CP probes, the
ROV II probe used has twin silver chloride electrodes, for online
calibration and redundancy.
- Extended battery life:
The unit runs on 9V alkaline
batteries triggered by a photo-cell, allowing the batteries to last an
entire dive season with continuous operation.
- Easily serviced / repaired:
All parts for both the Deep C Meter readout, as well as the ROV II probe
are serviceable and each unit comes with a comprehensive spares package.
Additional spare parts are also available from Deepwater.
- Light-duty version available:
The Deep C Meter is available in two distinct versions: the 3000 m rated
version (Deep C Meter 3000), and the lighter-duty 300m rated version for
inspection class ROV's (Deep C Meter 300). The Deep C Meter 300 standard
system uses Delrin for a number of the analagous stainless steel
components in the 3000 m rated version. Namely the T-handle mount,
articulated readout mount, and readout housing.
Applications
- Deepwater subsea equipment ROV CP
surveys
- Anode and field gradient surveys
- Deepwater Flow-line surveys
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Deep C Meter 3000 kit components
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The Deep-C-Meter kit
includes the ROV II tip-contact probe. This probe
interfaces directly with the readout, which requires no
connection to the umbilical. |
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The readout protected by
a stainless steel housing, rated for depths of up to
3000 m. Replacement components are sold individually,
and repair services are available. |
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The standard Deep C
Meter kit comes with all components housed in a durable,
water-tight custom offshore pelican case. The case has
wheels and a pull-out handle. |
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The ROV II probe
operates with dual Ag / AgCl reference electrodes, which
plug directly into the guts of the probe. Additional
electrode elements are available individually. |
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Two tubes of O-ring lube
come standard in the Deep C Meter kit (300 and 3000);
replacement tubes are available individually.
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The ROV II nose cone
assembly comprises the nose cone, a contact tip, and the
connector. Replacement tip(s) and cone(s) are available
separately. |
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A whip extender is also
available for the ROV II probe (not included in the
standard kit), which can make extend the whip up to
twelve (12) ft. |
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The readout itself is
mounted to an articulating platform, which can be
secured to any convenient area on the ROV frame, to
accommodate other instrumentation on board. |
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The T-Handle mount for
the ROV II has a shock absorber to protect the probe
during survey. The T-handle can be swapped for a
fish-tail style handle. |
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Deep C Meter 300 kit components
The Deep C Meter 300 kit is
identical to the 3000 kit with a few exceptions.
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The readout is housed in
Delrin, rather than stainless steel. Much lighter in
weight, Delrin is strong enough for 300 m depths.
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The probe T-handle mount
and articulated readout mount are of a completely
different design, also made of Delrin, so that
inspection-class ROV's can handle the weight. |
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