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A continuous CP potential profile tool that
utilizes a water bridge to
maintain contact between a mobile reference electrode and the soil.
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Description
The Rota-Cell™ is a
unique piece of equipment. It is actually a "reference electrode
accessory" that utilizes a water bridge to maintain continuous contact
between your "portable reference electrode" and the soil, greatly
reducing contact issues due to human error or terrain. The ability to
mount this piece of equipment to an all-terrain vehicle (ATV) or a truck
and survey over navigable terrain with little to no pre-staging makes it
ideal for use by pipeline corrosion technicians to hot spot areas of
concern on their pipeline. For longer surveys where terrain is navigable
by an ATV or truck, productivity can be doubled or better.

Rota-Cell™ System
Features
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Easily mounts to the hitch
of an ATV or truck.
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Use with any standard
plastic water tank.
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Use your existing data
logger or voltmeter, standard reference electrode and backpack.
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Surveyor rides on ATV or in
truck while surveying.
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The reference electrode
remains in continuous contact with soil through a water pathway during
the survey, permitting the surveyor the option of triggering data on a
timed cycle, by footage or to view a constant profile.
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Ideal
for pipeline technicians needing to hot spot a section of pipeline.
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Verify levels of cathodic
protection between test stations.
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Improved data quality in
difficult soil contact environments.
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Identify potential anomalies
and field mark for further testing or "dig and inspection."
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Survey foreign pipeline
crossings or any other area where stray current interference is
suspected.
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Use for troubleshooting,
verifying levels of protection on distribution piping systems down
alleyways, or to identify locations of buried sacrificial anodes.
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If the pipeline is not
navigable directly over the line and only "off-set" survey (to the side
of the pipeline) can be performed, the Rota-Cell can be used to identify
areas justifying more detailed close interval survey (i.e. drilling
asphalt roads, clearing of right-of-way, etc.).
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| Field Test Data

Field data was
collected using two simultaneously triggered data loggers
attached to a common pipeline test lead. One surveyor rode an
ATV utilizing the Rota-Cell reference, and the other surveyor
walked directly behind the ATV with standard cane reference
cells. Conditions were dry, windy, and 95ºF. The soil was
pre-watered using the Rota-Cell pre-water feature. The rectifier
interruption cycle was 1.6s ON, 0.4s OFF.
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