|
 The
location and measurement of pipeline corrosion using
electromagnetic detection devices (Locators) are
increasingly being linked with GIS systems and GPS
information, to provide an accurate record of the
condition of pipes and the position and time
co-ordinates for post mapping analysis – this
requirement is the basis of the PCM+.
The PCM+ System consists of a portable
transmitter and a hand held receiver. The transmitter
connected at the CPS station or test post, applies a
special signal to the pipeline.
The receiver locates this unique signal
at distances up to 30km (19 miles) identifying the
position and depth of the pipe. Once the pipe has been
located the technician can map the leakage currents
along the pipe in magnitude and direction allowing
coating defects to be quickly identified.
Once the segment of pipeline where the
defect lies has been identified, by using an A-frame,
the defect position and depth can be further pinpointed
to within 1 meter (3 feet).
The PCM+ using its powerful feature set
including Automatic Signal Attenuation (ASA), accurately
and easily locates and maps the pipeline even in areas
where there is contact with other metallic structures,
electrical interference, or congestion, providing
simultaneous measurement of PCM current (ACCA) and
Voltage Gradient (ACVG).
This eliminates the need for the operator
to perform ‘current spans’ and manual calculations to
determine CP currents along a pipeline that would
usually require a direct connection.
Each
time the PCM+ maps in any of the modes, as well as
storing and displaying the information on the receiver,
all the data gathered can be sent via Bluetooth® to
either a PC or an optional PDA (with GPS), and displayed
in a number of graphical formats for fast analysis.
The PCM+
and its accessory equipment provide any pipeline
technician with the latest in accurate, fast and
reliable pipeline current mapping tools. |
