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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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Summary of Contents for 27MG

Page 1: ...gnal 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...

Page 2: ...tions USB connector for software upgrade only Transducer USB communication connector for software upgrade only Transmit Receive transducer connector 2 Transmit Receive transducer connector 1 Downloade...

Page 3: ...strument 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 d...

Page 4: ...f 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 thic...

Page 5: ...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 m...

Page 6: ...therwise 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...

Page 7: ...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 t...

Page 8: ...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...

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