Olympus 27MG Manuale utente
27MG — Getting Started Guide 1
Intended Use
The 27MG is designed to measure thicknesses of industrial and commercial materials. Do not use the
27MG for any purpose other than its intended use.
Instruction Manual
Before use, thoroughly review the 27MG User’s Manual, and use the product as instructed. The User’s
Manual contains essential information on how to use this Olympus product safely and effectively. The
27MG User’s Manual is available on the documentation CD that is shipped with the 27MG, or can be
downloaded at www.olympus-ims.com. Keep the documentation CD in a safe, accessible location.
Safety Signal Words
Indicates an imminently hazardous situation and 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
Indicates a potentially hazardous situation and 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.
Indicates a potentially hazardous situation and calls attention to a 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.
27MG Ultrasonic Thickness Gage
Getting Started Guide
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27MG — Getting Started Guide 3
To Replace the Batteries
Do not replace the batteries while the instrument is turned on. Dispose of used batteries promptly.
Keep batteries out of reach of children. The batteries used in this device may present a risk of fire or
chemical burn if mistreated. Do not disassemble, heat above 50 °C, or incinerate the batteries.
1. Ensure that the 27MG is turned off.
2. Disconnect any cables that are
connected to the 27MG.
3. Remove the optional protective
rubber boot, if installed.
4. Turn the battery door screw
counterclockwise to unlock the door.
5. Remove the battery door.
6. Remove the batteries.
7. Insert three new batteries into the
battery compartment, making sure to
observe the correct polarity for each
battery.
8. Reinstall the battery door on the back
of the instrument, and then turn the
battery door screw clockwise to lock
the door.
9. Reinstall the optional protective
rubber boot, if required.
10. Press to turn on the 27MG
instrument.
11. To answer the question displayed at the bottom of the screen:
Select Alkaline when using three AA-size alkaline batteries.
OR
Select NiMH when using three AA-size nickel-metal hybrid (NiMH) batteries.
12. Press [ENTER].
You can also operate the 27MG using three AA-size NiMH rechargeable batteries. The 27MG does not
recharge NiMH batteries. The batteries must be recharged using a commercially available external
battery charger (not included).
To Start Using a D79X Dual Element Transducer
1. Plug the transducer into the transducer connectors located on the top of the instrument.
2. Press to turn on the instrument.
3. Wipe any couplant off the transducer tip, and then press [2nd F], [Cal Zero] (Do Zero) or
[2ndF], [Cal Ø] (Do Ø).
Three AA-size
batteries
Battery door
Battery compartment
(empty)
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4 27MG — Getting Started Guide
The 27MG is now ready to take thickness readings for the test block supplied with the
instrument, using the default velocity.
To Calibrate the Instrument
The 27MG must be calibrated to ensure the thickness measurement accuracy for the transducer and
the tested material being used. This is achieved by performing the velocity and zero calibrations on
two known thicknesses of a test block (such as a five-step test block, as shown below) made out of the
same material as the inspected parts.
1. Place couplant on the surface of the thick sample of the test block.
2. Couple the transducer on the thick sample of the test block.
3. Press [Cal Vel] or [Cal ].
4. Once the thickness reading is stable, press [ENTER] or [].
5. Use the arrow keys to enter the known thickness.
6. Press [Cal Zero] or [Cal Ø].
7. Place couplant on the surface of the thin sample of the test block.
8. Couple the transducer on the thin sample of the test block.
9. Once the thickness reading is stable, press [ENTER] or [].
10. Use the arrow keys to enter the known thickness.
11. Press [MEAS].
For more information about calibration, and about selecting the correct transducer for a specific
application, refer to the 27MG Ultrasonic Thickness Gage — User’s Manual, or contact Olympus.
Transducer on a
thick sample
Transducer on a
thin sample
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27MG — Getting Started Guide 5
Keypad Functions
The 27MG comes with either an English or international keypad. The functions on both keypads are
identical. Many keys on the international keypad contain pictograms instead of text labels. In the
27MG user documentation, keypad keys are referred to using the English label, displayed in bold and
within brackets (ex.: [Gain]).
Each key is labelled according to its primary function. The area immediately above certain keys
indicates a secondary key function. The [], [], [], [], and [ENTER] or []keys are used to select
menu items and screen parameters, and to change parameter values. Use the [MEAS] key at any time
to return to the measurement screen.
Measurement Screen
English keypad International keypad
Battery power indicator
Thickness value
Units
Alarm indicator
Mode and update rate Gain level
Update rate
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6 27MG — Getting Started Guide
Instrument Hardware Components
Battery Precautions
• Before disposing of a battery, check your local laws, rules, and regulations, and follow them
accordingly.
• Do not open, crush, or perforate batteries; doing so could cause injury.
• Do not incinerate batteries. Keep batteries away from fire and other sources of extreme heat.
Exposing batteries to extreme heat (over 50 °C [122 °F]) could result in an explosion or personal
injury.
• Do not drop, hit, or otherwise abuse a battery, as doing so could expose the cell contents, which
are corrosive and explosive.
• Do not short-circuit the battery terminals. A short circuit could cause injury and severe damage
to a battery, making it unusable.
• Do not expose a battery to moisture or rain; doing so could cause an electric shock.
• Do not leave batteries in the 27MG unit during instrument storage.
Equipment Disposal
Before disposing of the 27MG, check your local laws, rules, and regulations, and follow them
accordingly.
Strap ring
Display
Keypad
Transmit/Receive transducer
connectors 1 and 2
I/O door protecting USB
connector
On/Off key
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27MG — Getting Started Guide 7
Electrical Warnings
To avoid the risk of electric shock, do not touch the inner conductor of the Transmit/Receive (T/R) T/R1
and T/R2 transducer connectors. Up to 150 V can be present on the inner conductors.
• Do not touch the connectors directly by hand. Otherwise, a malfunction or electric shock may
result.
• Do not allow metallic foreign objects to enter the device through the connectors or any other
openings. Otherwise, a malfunction or electric shock may result.
Transmit/Receive
1 and 2 transducer
connectors inner
conductors
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Olympus NDT, 48 Woerd Avenue, Waltham, MA 02453, USA
www.olympus-ims.com
Printed in the United States of America • Copyright © 2013, 2014 by Olympus. All rights reserved.
All brands are trademarks or registered trademarks of their respective owners and third party entities.
Part ID: U8778658 *U8778658* Printed on Rolland Hitech50,
which contains 50 % post-
consumer fiber.
DMTA-10042-01EN
Rev. B, January 2014 *DMTA-10042-01EN*
50%
27MG — Getting Started Guide
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