CDI CD42-STS User manual
1801 North Juniper Avenue
Broken Arrow, Oklahoma 74012 U.S.A.
+1 (918) 258-6068 worldwide
www.pigging.com
CD42-STS
USER GUIDE
+1(918)645-0477
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
Page 2 of 36
Informaon in this document is subject to change without noce and
applies only to the version of soware, hardware or rmware described
on the tle page.
The hardware and rmware described in this document are designed,
manufactured and wrien by CDI. The hardware and rmware copyright
© CDI with all rights reserved.
This document 2007-2016 CDI. All rights reserved.
Document Number 89-09-0046-00
Manual Revision 03 Mar 2016
The CD42-STS is covered under United States Patent.
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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INTRODUCTION .......................................................................4
DEPLOYMENT...........................................................................4
COMPONENTS .........................................................................4
POWER .....................................................................................5
DETECTION METHODS ............................................................5
GETTING STARTED...................................................................6
Physical Checkout ....................................................................6
Power ON ................................................................................7
Operaonal Checkout ................................................................8
OPERATION ............................................................................11
Tracking .................................................................................11
Locang .................................................................................14
Pinpoinng ............................................................................15
CHANGING/INSTALLING BATTERIES ....................................18
OPTIONAL EQUIPMENT ........................................................24
ROV Handles..........................................................................24
Close Proximity Antenna (CPA) ..................................................26
WARRANTY, CARE, & MAINTENANCE ..................................32
Warranty................................................................................32
Making a Warranty Claim ......................................................32
Care and Maintenance ..........................................................33
Service and Repairs................................................................33
SYSTEM SPECIFICATIONS ......................................................34
NOTES .....................................................................................35
ABOUT CDI .............................................................................36
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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The CD42-STS is a pipeline pig locang and tracking receiver that detects
pulsing signals emied by electromagnec transmiers in a subsea
pipeline.
The transmier signal strength is displayed on an LED array which can
be easily seen by a diver or ROV operator who is tracking moving pigs
and/or locang a staonary or stuck pig.
The CD42-STS may be deployed below the ocean to depths of 8,0000
[2,439 m] and is designed to be either carried by a diver or ROV. It is
rated for a maximum pressure of 3,650 psi [245 bar].
The CD42-STS is constructed of stainless steel. A control buon adjusts
antenna gain, which is displayed on an array of 16 light-eming
diodes (LED). The LEDS also indicate
transmier proximity when tracking
or locang a pig. Diver handles may be
removed and replaced with oponal
“shtail” ROV handles (see pg. 24).
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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The 26.4-in. [670.5 mm] antenna may
be removed and replaced with an oponal
Close Proximity Antenna (CPA). The CPA is sensive
only to very near signals
and designed for use where
mulple pigs are extremely close to one
another such as in launchers and receivers.
POWER
The CD42-STS is powered by six (6) D-cell alkaline baeries. The
baeries are located in the unit’s stainless steel housing. Changing
these baeries requires disassembly of the housing (see pg. 18).
The CD42-STS will operate for up to 60 hours (2.5 days) on a change of
baeries.
The CD42-STS can track and locate any pig or inline inspecon (ILI) tool
equipped with a 22 Hz electromagnec transmier. Shown here are
some of the 22 Hz transmiers manufactured by CDI.
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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The CD42-STS receiver is assembled at CDI and should be ready for
operaon upon receipt. The baeries are installed and the unit is sealed
and tested for funconality just prior to shipment.
Check for any damage to the CD42-STS receiver aer removal from
the shipping container. Check the antenna for any bends, dents, or
deformies.
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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Remove the large hexagonal plug located
on the antenna side of the system
to access the power switch.
(You’ll need a 1–5/8-in. open-end wrench
or adjustable wrench to loosen plug).
Press the red pushbuon switch
to toggle the system power
ON/OFF.
Inspect O-ring and O-ring groove
before replacing plug (see pg. 21 for
O-Ring inspecon and maintenance
informaon).
Replace plug. Tighten unl snug (do not over-ghten).
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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When the unit is rst powered on, the unit will perform a self-check.
This is indicated by a rapid back and forth scrolling of the LED array.
The LEDs on each side will ash in succession from boom to top and
back down ve mes as shown here.
The CD42-STS is operaonal when the self-check has completed, but
you may wish to adjust the signal gain before placing the unit into
service. (See following pages.)
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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When the self-check is complete, the display will indicate the last
signal gain (sensivity) seng stored in the memory by ashing three
mes and then remain on for
another three seconds. Here,
the unit has been set to a
relavely low gain level of 3.
The gain readout will
remain on for 3 seconds
then the display will go
dark.
The CD42-STS
receiver is now in the
operaonal mode and is looking for
electromagnec pulses. To verify that
the unit is operang prior to deployment, bump the antenna with your
hand. The displays LEDs will jump and conrm it is operang.
Press and hold the control buon momentarily to redisplay the current
gain seng. To increase signal gain,
connue to hold the buon
down. Aer approximately
3 seconds, you will see the LEDs
light in succession from
le to right as the
gain level increases.
Each increment will
be set in 1.25-second
intervals.
Aer the gain control
reaches the full-scale posion it will
cycle to the zero gain posion. Keeping the buon pressed will restart
the gain increase cycle.
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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No LEDs lit indicate zero gain posion. Low gain sengs (1,2, and 3) are
useful when the CD42-STS is used in very close proximity to a transmier
such as at a pig launcher or receiver.
The gain seng is stored in non-volale memory. It is retained when the
receiver is powered down and even if baeries are removed.
When the unit is powered back up your gain seng will be displayed in
the power ON sequence.
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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The operator readout for tracking and locang is the 16-LED display.
It is read from le to right (minimum to maximum). The LED behavior
simulates the movement of the needle on an analog meter.
The display contains a peak hold indicaon whereby an LED will light
to indicate the maximum averaged signal received by the CD42-STS
receiver. As the signal level increases (or the transmier gets closer) the
peak LED will light and shi to the right and as the signal diminishes the
peak LED will shi to the le. The LED indicators that are below the peak
LED will pulse to indicate the pulses received by the transmier.
The CD42-STS system must be within a few meters of a pipeline, with
the antenna held parallel to the pipeline. Typically, the diver or ROV
operator will set up with
the antenna parallel to
the pipeline in a locaon
where he knows the pig
will pass and wait.
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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Electromagnec elds are three-dimensional. A 3-dimensional rendering
of a typical Signal eld might resemble this. (Note STS antenna
orientaon parallel to pipe.)
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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As the pig approaches the unit, the measured signal strength increases.
This is a two-dimensional representaon of a signal peak:
The peak LED will shi to the right to indicate the increasing average
strength as transmier pulse strength increases.
Aer the pig passage, the operator moves quickly to the next
predetermined spot to wait and monitor the signal for the approach of
the pig.
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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Locang a stuck pig in a pipeline is one of the most useful features of
the CD42-STS. The best way to minimize the amount of searching for a
stuck pig is to properly track the pig in the pipeline so that when and if
it does become stuck, the amount of pipeline in which it could be is at a
minimum.
If the last conrmed tracking locaon is known, all the operator has to
do to locate a stuck pig is back-track the pipeline unl the receiver reads
the signal.
To locate a staonary
pig, the diver or ROV
operator moves along
the pipeline with the
antenna held parallel
to the pipeline.
The peak signal indicator will shi right as the operator approaches the
stuck pig. If the peak signal starts to diminish in strength (peaks start
falling toward the le) the operator has passed the stuck pig.
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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Back-track again unl the perceived maximum signal is received. At this
point the CD42-STS receiver is at its closest approach to the pig.
This point on the pipeline can be marked for cung or other remedial
acons. (See next secon, Pinpoinng.)
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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Once the approximate locaon of a staonary pig is known, a more
precise method known as “pinpoinng” can be used to further increase
the locaon accuracy. With the pinpoinng method, the antenna of
the CD42-STS is rotated to be perpendicular to the pipeline rather than
parallel. Once rotated, the operator looks for the minimum (“null”) signal
rather than the maximum.
A 3-D representaon of the signal “null” is shown here:
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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This method relies upon the physics of the coupling between the
magnec transmier inside the pipeline and the receiving antenna on
the outside of the pipeline.
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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The CD42-STS is shipped with 1.5 VDC D-cell alkaline baeries installed.
The esmated baery life is approximately 60 hours (2.5 days).
Tool required:
3/16-in Allen wrench
Remove the eight (8)
socket head cap screws
(1/4–20 x 5/8 in.) and
lock washers from
the operator end
of the housing.
Note the clocking
orientaon of the end cap
to the antenna posioning.
To change baeries:
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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CAUTION: The end plate
is heavier than it looks; be
careful not to damage the
O-ring or circuitry under the
plate.
Do not bump or drop
the end plate.
Avoid straining the ribbon
cable or cable connecons.
Carefully disconnect
ribbon cable connector
from circuit board on end
plate.
CD42-STS Subsea Diver/ROV Pig Locaon and Tracking System
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Remove baeries.
Note baery polarity.
The four upper baeries are
installed Posive (+) end
facing out.
The two lower baeries are
installed Posive (+) side
inward.
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