Olympus COBRA User manual

DMTA-20006-01EN — Rev. B
February 2014
COBRA
Handheld Pipe-Weld Scanner
User’s Manual
This instruction manual contains essential information on how to use this Olympus product safely and effectively.
Before using this product, thoroughly review this instruction manual. Use the product as instructed.
Keep this instruction manual in a safe, accessible location.

Olympus NDT, 48 Woerd Avenue, Waltham, MA 02453, USA
Copyright © 2010, 2014 by Olympus. All rights reserved. No part of this
publication may be reproduced, translated, or distributed without the express
written permission of Olympus.
This document was prepared with particular attention to usage to ensure the
accuracy of the information contained therein, and corresponds to the version of
the product manufactured prior to the date appearing on the title page. There
could, however, be some differences between the manual and the product if the
product was modified thereafter.
The information contained in this document is subject to change without notice.
Part number: DMTA-20006-01EN
Rev. B
February 2014
Printed in Canada
All brands are trademarks or registered trademarks of their respective owners and
third party entities.

DMTA-20006-01EN, Rev. B, February 2014
Table of Contents iii
Table of Contents
List of Abbreviations ........................................................................................ v
Labels and Symbols ........................................................................................... 1
Important Information — Please Read Before Use ..................................... 3
Intended Use .......................................................................................................................... 3
Instruction Manual ................................................................................................................ 3
Instrument Compatibility ..................................................................................................... 4
Presence of Visual Interferences or Phantom Spots ......................................................... 7
Safety Symbols ....................................................................................................................... 8
Safety Signal Words ............................................................................................................... 8
Note Signal Words ................................................................................................................. 9
Safety ....................................................................................................................................... 9
Warnings ............................................................................................................................... 10
CE (European Community) ............................................................................................... 10
WEEE Directive .................................................................................................................... 10
Warranty Information ......................................................................................................... 11
Technical Support ................................................................................................................ 11
Introduction ...................................................................................................... 13
1. COBRA Scanner Description .................................................................. 15
1.1 Scanner Components ................................................................................................ 16
1.2 About the Setup Templates ..................................................................................... 18
1.3 Required Tools for Scanner Setup .......................................................................... 20
2. Setup and Operation ................................................................................. 21
2.1 Removing the Probe ................................................................................................. 21
2.2 Installing the Probe ................................................................................................... 22

DMTA-20006-01EN, Rev. B, February 2014
Table of Contents iv
2.3 Changing the Wedge ................................................................................................ 25
2.4 Adjusting the Length of Exposed Cables and Tubes ........................................... 26
2.5 Configuring the Scanner Using the Setup Template ............................................ 27
2.6 Configuring the Scanner Without the Setup Template ....................................... 35
2.7 Using the Wedge-Separation Indicators ................................................................ 41
2.8 Operating the Scanner .............................................................................................. 43
3. Maintenance and Troubleshooting ........................................................ 47
3.1 Cleaning the Scanner ................................................................................................ 47
3.2 Troubleshooting ........................................................................................................ 47
4. Accessories and Spare Parts ..................................................................... 51
4.1 Ordering Part Numbers ........................................................................................... 52
4.2 Spare Parts .................................................................................................................. 58
5. Specifications .............................................................................................. 61
5.1 General and Operating Environment Specifications ........................................... 61
5.2 Connector Reference ................................................................................................. 62
5.3 Probe Specifications .................................................................................................. 64
5.4 Scanner Setup Charts ................................................................................................ 64
List of Figures ................................................................................................... 67
List of Tables ..................................................................................................... 69
Index ................................................................................................................... 71

DMTA-20006-01EN, Rev. B, February 2014
List of Abbreviations v
List of Abbreviations
AOD axial outside diameter
CE european community
ID inside diameter
LW longitudinal wave
OD outside diameters
SW shear wave
UT ultrasonic testing

DMTA-20006-01EN, Rev. B, February 2014
List of Abbreviations vi

DMTA-20006-01EN, Rev. B, February 2014
Labels and Symbols 1
Labels and Symbols
Marking locations of the instrument are shown in Figure i-1 on page 1. If any or all of
the labels or symbols are missing or illegible, please contact Olympus. The
descriptions of the symbols are provided in Table 1 on page 2.
Figure i-1 Marking locations
Symbols
Serial number
Symbols
Encoder resolution
32.08 counts/mm

DMTA-20006-01EN, Rev. B, February 2014
Labels and Symbols 2
Table 1 Symbols
The CE marking is a declaration that this product conforms to
all the applicable directives of the European Community. See
the Declaration of Conformity for details. Contact your Olympus
representative for more information.
The WEEE symbol indicates that the product must not be
disposed of as unsorted municipal waste, but should be
collected separately.
The warning symbol indicates that the user must read the user’s
manual in order to find out the nature of the potential hazards
and any actions to avoid them.
The direct current symbol.
S/N The serial number.

DMTA-20006-01EN, Rev. B, February 2014
Important Information — Please Read Before Use 3
Important Information — Please Read Before Use
Intended Use
The COBRA scanner is designed to perform nondestructive inspections of welds on
industrial and commercial cylindrical parts. The COBRA scanner is a manual scanner
for pipes with diameters ranging from 21.3 mm to 114.3 mm (0.84 in. to 4.50 in.). It is
designed to provide the encoded position of the probes on the circumference around
the pipe.
The COBRA scanner is intended for both dual-and single-probe scanning
applications. The COBRA scanner is intended to operate in an environment as
described in Table 11 on page 62.
Do not use the COBRA scanner for any purpose other than its intended use. It must
never be used to inspect or examine human or animal body parts.
Instruction Manual
This instruction manual contains essential information on how to use this Olympus
product safely and effectively. Before using this product, thoroughly review this
instruction manual. Use the product as instructed.
Keep this instruction manual in a safe, accessible location.

DMTA-20006-01EN, Rev. B, February 2014
Important Information — Please Read Before Use 4
The images in this manual may not be identical to your instrument model and
connector type. However, the operating principles remain the same.
Instrument Compatibility
The COBRA scanner is compatible with the Olympus ancillary equipment listed in
Table 2 on page 4.
Table 2 Ancillary equipment
Part number Item number Description
COBRA U8750053
Small pipe scanner kit with encoder to
cover 21.3 mm to 114.3 mm pipe outside
diameters (OD). Packaged in hard carrying
case.
2.25CCEV35-A15C-P-2.5-OMaU8331117
2.25 MHz low profile phased array probe
with 16 elements, 0.5 mm pitch, and 10 mm
elevation.
The elements are curved on the elevation
with a 35 mm radius.
The cable is 2.5 m long with OmniScan
connector.
3.5CCEV35-A15C-P-2.5-OMa. U8331149
3.5 MHz low profile phased array probe
with 16 elements, 0.5 mm pitch, and 10 mm
elevation.
The elements are curved on the elevation
with a 35 mm radius.
The cable is 2.5 m long with OmniScan
connector.

DMTA-20006-01EN, Rev. B, February 2014
Important Information — Please Read Before Use 5
5CCEV35-A15-P-2.5-OM U8331163
5 MHz low profile phased array probe with
16 elements, 0.5 mm pitch, and 10 mm
elevation.
The elements are curved on the elevation
with a 35 mm radius.
The cable is 2.5 m long with OmniScan
connector.
7.5CCEV35-A15-P-2.5-OM U8330826
7.5 MHz low profile phased array probe
with 16 elements, 0.5 mm pitch, and 10 mm
elevation.
The elements are curved on the elevation
with a 35 mm radius.
The cable is 2.5 m long with OmniScan
connector.
10CCEV35-A15-P-2.5-OM U8331014
10 MHz low profile phased array probe
with 32 elements, 0.3 mm pitch, and 7 mm
elevation.
The elements are curved on the elevation
with a 35 mm radius.
The cable is 2.5 m long with OmniScan
connector.
COBRA-A-SA15 U8721205
Two flat shear wave (SW) wedges plus ten
pairs of curved shear wave (SW) wedges to
cover the 21.3 mm to 114.3 mm (0.84 in. to
4.50 in.) pipe outside-diameter range.
COBRA-A-SA15LW U8722168
Two flat longitudinal wave (LW) wedges
plus ten pairs of curved longitudinal wave
(LW) wedges to cover the 21.3 mm to
114.3 mm (0.84 in. to 4.50 in.) pipe outside-
diameter range.
COBRA-A-ST1-70L U8701348
Two flat wedges plus nine pairs of curved
time-of-flight diffraction (TOFD) wedges to
cover the 26.7 mm to 114.3 mm (1.05 in. to
4.50 in.) pipe outside-diameter range.
Compatible with 3 mm diameter element
ST1 UT probes.
COBRA-SP-IRRIGATION U8775226 Spare parts kit including irrigation tubes,
fittings, and valve (see Table 8 on page 57)
Table 2 Ancillary equipment (continued)
Part number Item number Description

DMTA-20006-01EN, Rev. B, February 2014
Important Information — Please Read Before Use 6
COBRA-SP-BASIC U8775166 Basic spare parts kit (see Figure 4-2 on
page 57)
COBRA-SP-FULL U8775188 Basic spare parts kit, plus links and the
encoder assembly
COBRA-SP-SA15 U8750056
One of each of the eleven wedges needed
for coverage of 21.3 mm to 114.3 mm
(0.84 in. to 4.50 in.) pipe outside-diameter
range.
OMNI-A2-SPLIT128 U8100133
Y-adaptor (splitter) to support two phased
array probes on OmniScan MX2
instruments with PA2 128 elements
module.
OMNI-A2-SPLIT64 U8100135
Y-adaptor (splitter) to support two phased
array probes on OmniScan MX2
instruments with PA2 64 elements module.
OMNI-A-ADP05 U8767016
Y-adaptor (splitter) with OmniScan
connectors to support two phased array
probes
E128P0-0000-OM U8800428
Phased array cable extensions required to
interface between the Omni-A-ADP05 and
an OmniScan MX2 instrument with PA1
128 elements module.
EIB64-NT-0-P-0-OM U8779452
Interbox to support 2 phased array probes
on OmniScan MX2 instruments with PA1
64 elements module.
WTR-SPRAYER-4L U8775153 4ℓmanual water pump with couplant
tubes and fittings
Omni-A2-ADP20 U8775201
Scanner interface adaptor to connect
scanners encoder cables with DE-15
connector to OmniScan MX2 with LEMO
connector scanner interface.
Omni-A-ADP27 U8780329
Scanner interface adaptor to connect
scanners encoder cables with LEMO
connector to OmniScan MX with DE-15
connector scanner interface.
C1-LF-BXM-0.3M U8769010
0.3 m long adapter LEMO female to Bendix
male linking LEMO encoder cable to
Focus LT.
Table 2 Ancillary equipment (continued)
Part number Item number Description

DMTA-20006-01EN, Rev. B, February 2014
Important Information — Please Read Before Use 7
Always use equipment and accessories that meet Olympus specifications. Using
incompatible equipment could cause equipment malfunction and/or damage, or
human injury.
Presence of Visual Interferences or Phantom Spots
In a situation of physical proximity of powerful electromagnetic radiators, visual
interferences or phantom spots maybe present. These interferences are temporary and
their persistence is not permanent in comparison with physical features of the
inspected part.
C1-DE15F-BXM-0.30M U8767107
0.3 m long adapter DE-15 female to Bendix
male linking DE-15 encoder cable to
Focus LT.
OmniScan PA or FOCUS LT —Many OmniScan and Focus LT instrument
models can be used.b, c
a. SA15C casings are based on the same design as the A15 but are 2 mm (0.08 in) taller, increasing
height clearance.
b. Encoder cable adaptor may be required (see Table 12 on page 62).
c. A two-sided COBRA scanner must be used with a multi-group instrument.
Table 2 Ancillary equipment (continued)
Part number Item number Description

DMTA-20006-01EN, Rev. B, February 2014
Important Information — Please Read Before Use 8
Safety Symbols
The following safety symbols might appear on the instrument and in the instruction
manual:
General warning symbol
This symbol is used to alert the user to potential hazards. All safety messages that
follow this symbol shall be obeyed to avoid possible harm or material damage.
High voltage warning symbol
This symbol is used to alert the user to potential electric shock hazards greater
than 1000 volts. All safety messages that follow this symbol shall be obeyed to
avoid possible harm.
Safety Signal Words
The following safety symbols might appear in the documentation of the instrument:
The DANGER signal word indicates an imminently hazardous situation. It calls
attention to a procedure, practice, or the like, which, if not correctly performed or
adhered to, could result in death or serious personal injury. Do not proceed beyond a
DANGER signal word until the indicated conditions are fully understood and met.
The WARNING signal word indicates a potentially hazardous situation. It calls
attention to a procedure, practice, or the like, which, if not correctly performed or
adhered to, could result in death or serious personal injury. Do not proceed beyond a
WARNING signal word until the indicated conditions are fully understood and met.

DMTA-20006-01EN, Rev. B, February 2014
Important Information — Please Read Before Use 9
The CAUTION signal word indicates a potentially hazardous situation. It calls
attention to an operating procedure, practice, or the like, which, if not correctly
performed or adhered to, could result in minor or moderate personal injury, material
damage, particularly to the product, destruction of part or all of the product, or loss of
data. Do not proceed beyond a CAUTION signal word until the indicated conditions
are fully understood and met.
Note Signal Words
The following safety symbols could appear in the documentation of the instrument:
The IMPORTANT signal word calls attention to a note that provides important
information, or information essential to the completion of a task.
The NOTE signal word calls attention to an operating procedure, practice, or the like,
which requires special attention. A note also denotes related parenthetical
information that is useful, but not imperative.
The TIP signal word calls attention to a type of note that helps you apply the
techniques and procedures described in the manual to your specific needs, or
provides hints on how to effectively use the capabilities of the product.
Safety
Before using the product, verify that the correct safety precautions have been taken
(see the following warnings). In addition, note the external markings on the product,
which are described under “Safety Symbols”.

DMTA-20006-01EN, Rev. B, February 2014
Important Information — Please Read Before Use 10
Warnings
General Warnings
• Carefully read the instructions contained in this instruction manual prior to using
the product.
• Keep this instruction manual in a safe place for further reference.
• Follow the installation and operation procedures.
• It is imperative to respect the safety warnings on the instrument and in this
instruction manual.
• If the equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment could be impaired.
• Do not install substitute parts or perform any unauthorized modification to the
instrument.
CE (European Community)
WEEE Directive
This device complies with the requirements of both directive
2004/108/EC concerning electromagnetic compatibility and directive
2006/95/EC concerning low voltage. The CE marking indicates
compliance with the above directives.
In accordance with European Directive 2002/96/EC on Waste Electrical
and Electronic Equipment (WEEE), this symbol indicates that the
product must not be disposed of as unsorted municipal waste, but
should be collected separately. Refer to your local Olympus distributor
for return and/or collection systems available in your country.

DMTA-20006-01EN, Rev. B, February 2014
Important Information — Please Read Before Use 11
Warranty Information
Olympus guarantees your Olympus product to be free from defects in materials and
workmanship for a specific period, and in accordance with conditions specified in the
Olympus NDT Terms and Conditions available at http://www.olympus-
ims.com/en/terms/.
The Olympus warranty only covers equipment that has been used in a proper
manner, as described in this instruction manual, and that has not been subjected to
excessive abuse, attempted unauthorized repair, or modification.
Inspect materials thoroughly on receipt for evidence of external or internal damage
that might have occurred during shipment. Immediately notify the carrier making the
delivery of any damage, because the carrier is normally liable for damage during
shipment. Retain packing materials, waybills, and other shipping documentation
needed in order to file a damage claim. After notifying the carrier, contact Olympus
for assistance with the damage claim and equipment replacement, if necessary.
This instruction manual explains the proper operation of your Olympus product. The
information contained herein is intended solely as a teaching aid, and shall not be
used in any particular application without independent testing and/or verification by
the operator or the supervisor. Such independent verification of procedures becomes
increasingly important as the criticality of the application increases. For this reason,
Olympus makes no warranty, expressed or implied, that the techniques, examples, or
procedures described herein are consistent with industry standards, nor that they
meet the requirements of any particular application.
Olympus reserves the right to modify any product without incurring the
responsibility for modifying previously manufactured products.
Technical Support
Olympus is firmly committed to providing the highest level of customer service and
product support. If you experience any difficulties when using our product, or if it
fails to operate as described in the documentation, first consult the user’s manual, and
then, if you are still in need of assistance, contact our After-Sales Service. To locate the
nearest service center, visit the Service Centers page at: http://www.olympus-
ims.com.

DMTA-20006-01EN, Rev. B, February 2014
Important Information — Please Read Before Use 12

DMTA-20006-01EN, Rev. B, February 2014
Introduction 13
Introduction
This manual provides instructions for assembling, installing, and operating the
COBRA scanner.
The COBRA scanner is a manual weld inspection scanner for the non destructive
inspection of pipes with outside diameters ranging from 21.3 mm to 114.3 mm
(0.84 in. to 4.50 in.). The COBRA scanner typically uses the OmniScan (models can
vary) with a 16:64 or a 16:128 module, and the OmniScan MXU software to inspect
circumferential welds on small-diameter pipes (see Figure i-2 on page 13).
Figure i-2 The OmniScan MX2 and the COBRA scanner
Note: Instrument model and connector type can vary.

DMTA-20006-01EN, Rev. B, February 2014
Introduction 14
With its very slim design, this manual scanner inspects pipes in limited access areas
where minimal clearance is required (see Figure i-3 on page 14). Adjacent
obstructions such as piping, supports, and structures can be as close as 12 mm
(0.5 in.). This spring-loaded scanner is designed to hold onto carbon steel and
stainless steel pipes of different diameters.
Figure i-3 Operating the COBRA scanner in a limited access area
The COBRA scanner is characterized by its smooth-rolling encoded movement
enabling precise data acquisition. The scanner can hold two phased array probes for a
complete inspection of the weld in one pass. For pipe-to-component inspections, the
scanner can be quickly configured to make one-sided inspections with only one
probe.
This Olympus solution uses low-profile phased array probes with optimized
elevation focusing, which improves the detection of small defects in thin-wall pipes.
Specially designed low-profile wedges that fit each pipe diameter covered by the
scanner, are also offered to complete the solution. The COBRA scanner ensures stable,
constant, and strong pressure thus providing good UT signals and precise encoding
around the full circumference of the pipe. This complete solution package is small and
lightweight for easy transport. The scanner is also waterproof, rust-free, and CE
compliant.