Olympus 27MG User manual

DMTA-10043-01EN — Rev. C
July 2016
27MG
Ultrasonic Thickness Gage
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 Scientific Solutions Americas, 48 Woerd Avenue, Waltham, MA 02453, USA
Copyright © 2013, 2014, 2016 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-10043-01EN
Rev. C
July 2016
Printed in the United States of America
All brands are trademarks or registered trademarks of their respective owners and third
party entities.

DMTA-10043-01EN, Rev. C, July 2016
Table of Contents iii
Table of Contents
List of Abbreviations ...................................................................................... vii
Labels and Symbols ........................................................................................... 1
Important Information — Please Read Before Use ..................................... 5
Intended Use .......................................................................................................................... 5
Instruction Manual ................................................................................................................ 5
Instrument Compatibility ..................................................................................................... 5
Repair and Modification ....................................................................................................... 6
Safety Symbols ....................................................................................................................... 6
Safety Signal Words ............................................................................................................... 7
Note Signal Words ................................................................................................................. 7
Warnings ................................................................................................................................. 8
Battery Precautions ................................................................................................................ 9
Equipment Disposal .............................................................................................................. 9
CE (European Community) ................................................................................................. 9
WEEE Directive .................................................................................................................... 10
China RoHS .......................................................................................................................... 10
Korea Communications Commission (KCC) ................................................................... 11
EMC Directive Compliance ................................................................................................ 11
FCC (USA) Compliance ...................................................................................................... 11
ICES-001 (Canada) Compliance ........................................................................................ 12
Warranty Information ......................................................................................................... 12
Technical Support ................................................................................................................ 13
1. Instrument Description ............................................................................. 15
1.1 Product Description .................................................................................................. 15
1.2 Environmental Ratings ............................................................................................ 16
1.3 Instrument Hardware Components ....................................................................... 16

DMTA-10043-01EN, Rev. C, July 2016
Table of Contents iv
1.4 Connectors ................................................................................................................. 17
1.5 Keypad Functions ..................................................................................................... 18
2. 27MG Power Requirements ..................................................................... 23
2.1 Power Indicator ......................................................................................................... 23
2.2 Batteries ...................................................................................................................... 24
3. Software User Interface Elements ........................................................... 27
3.1 Measurement Screen ................................................................................................ 27
3.2 Parameter Screens ..................................................................................................... 28
4. Initial Setup ................................................................................................ 31
5. Standard Calibration Measurement ....................................................... 35
5.1 Introduction ............................................................................................................... 35
5.2 Transducer Zero Compensation ............................................................................. 36
5.3 Velocity and Zero Calibration ................................................................................. 36
5.4 Material Velocity Calibration .................................................................................. 37
5.5 Zero Calibration ........................................................................................................ 39
6. Measurements ............................................................................................. 41
7. Additional 27MG Gaging Features ........................................................ 43
7.1 Adjusting the Backlight ............................................................................................ 44
7.2 Activating the Freeze Mode ..................................................................................... 45
7.3 Adjusting the Gain .................................................................................................... 45
7.4 Optimizing Material Gain Sensitivity .................................................................... 45
7.5 Restoring the Default Gain ...................................................................................... 46
7.6 Configuring the Measurement Setup ..................................................................... 46
7.7 Configuring the System Setup ................................................................................ 50
7.8 Activating High/Low Alarms .................................................................................. 52
7.9 Activating Diff Mode ................................................................................................ 53
7.10 Resetting the Instrument Parameters ..................................................................... 53
8. Specifications .............................................................................................. 57
9. Theory of Operation .................................................................................. 59
10. Application Notes ...................................................................................... 61
10.1 Factors Affecting Performance and Accuracy ...................................................... 61

DMTA-10043-01EN, Rev. C, July 2016
Table of Contents v
10.2 Transducer Selection ................................................................................................. 63
10.3 High Temperature Measurements ......................................................................... 66
11. Maintenance and Troubleshooting ........................................................ 69
11.1 Routine Care and Maintenance .............................................................................. 69
11.2 Transducers Maintenance ........................................................................................ 69
11.3 Error Messages .......................................................................................................... 70
11.4 Battery Problems ....................................................................................................... 70
11.5 Setup (Do--) Problems .............................................................................................. 70
11.6 Measurement Problems Diagnostic ....................................................................... 70
11.7 Self Diagnostics ......................................................................................................... 71
11.8 Gage Performance Tests ........................................................................................... 73
11.9 Repair Service ............................................................................................................ 75
11.10 Replacement Parts, Optional Parts, and Equipment ........................................... 75
Appendix: Sound Velocities .......................................................................... 77
List of Figures ................................................................................................... 81
List of Tables ..................................................................................................... 83
Index ................................................................................................................... 85

DMTA-10043-01EN, Rev. C, July 2016
Table of Contents vi

DMTA-10043-01EN, Rev. C, July 2016
List of Abbreviations vii
List of Abbreviations
DIAG diagnostic
DIFF differential
EFUP environment-friendly use period
IP Ingress Protection
LOS loss-of-signal
Max maximum
Min minimum
NiMH nickel-metal hydride
PDF portable document format
T/R transmit/receive
USB universal serial bus

DMTA-10043-01EN, Rev. C, July 2016
List of Abbreviations viii

DMTA-10043-01EN, Rev. C, July 2016
Labels and Symbols 1
Labels and Symbols
Safety-related labels and symbols are attached to the instrument at the locations
shown in Figure i-1 on page 1. The symbols are described in Table 1 on page 2 and
Table 2 on page 3. If any or all of the labels or symbols are missing or illegible, please
contact Olympus.
Figure i‑1 Labels locations
Location of serial number label
(see Table 1 on page 2)
Location of instruction and rating
label (see Table 1 on page 2)

DMTA-10043-01EN, Rev. C, July 2016
Labels and Symbols 2
Table 1 Content of the instruction and rating label
Content
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 regulatory compliance mark (RCM) label indicates that
the product complies with all applicable standards, and has
been registered with the Australian Communications and
Media Authority (ACMA) for placement on the Australian
market.
The WEEE symbol indicates that the product must not be
disposed of as unsorted municipal waste, but should be
collected separately.