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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2 27MG — Getting Started Guide

Connections

USB connector

(for software

upgrade only)

Transducer

USB communication

connector

(for software

upgrade only)

Transmit/Receive

transducer connector 2

Transmit/Receive

transducer connector 1

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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.

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

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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