Specifications

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©
2013 Deepwater Corrosion Services Inc. Specications subject to change without notice
ROV-II operation manual
5 Document 354-MN01-ENG Rev. C
4.2 ROV installation
4.2.1 The probe is best installed in or on a manipulator but may be attached directly to the ROV
frame if there is no manipulator available. (This should be done when only proximity readings are
required).
4.2.2 The recessed grooves in the probe body may be used to accommodate stainless steel
hose clamps for attachment. We recommend installing neoprene rubber pads between the probe
and the mounting surfaces and attaching a safety line to the probe. This will provide a better at-
tachment and some degree of compliance.
4.2.3 A male SEA CON
®
RMG-3FS connector on a 6’ (2m) whip is provided to facilitate splicing
into the ROV junction box.
4.2.4 Routing the two reference electrode wires in a shielded twisted pair in the ROV umbili-
cal is recommended. The tip wire can be connected to a coaxial cable or any other cable that is
straight-through to the control van with no breaks.
4.2.5 Topside, the system can be wired directly to a pair of digital multimeters (Fig. 7) or a Polat-
rak Deep C Meter (Fig. 8). It can also be wired directly into a video annotator with an input imped-
ance of at least 1 MΩ
4.3 Cautionary notes
Polatrak sintered silver / silver chloride reference electrode elements are designed to be rugged, but
they are consumables that have a given operational life. The life of these electrodes can be extended
to several seasons if the following care is taken:
4.3.1 Never allow the electrode elements to be directly shorted to ground or any other metallic
object when immersed in seawater.
4.3.2 Never use the electrode subsea with the underwater connector un-mated.
4.3.3 Never read the ROV-II probe with an analog voltmeter. Ensure that high-input impedance
digital equipment is used.
4.3.4 Never handle the bare reference electrode element (small gray pellet) with bare hands.
4.3.5 Do not use any type of solvent or detergent on the probe. Rinse only in fresh water after
every operation.
4.3.6 Never immerse the electrode in anything but fresh water or seawater.
4.3.7 Never allow a connector or bulkhead to be immersed unless it is mated or has a sealing
dummy plug inserted.
4.3.8 Never read the electrode on a multimeter scale other than DC Volts.
4.3.9 When not in use, store the probe in the provided container lled with seawater or tap
water. Probe can be stored dry between jobs but should be soaked in fresh water for at least one
hour before storage.
4.3.10 Do not attempt to eld-repair any wires on the probe or inside the probe and never attempt
to modify the probe tip in any way.