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.