Depth in mm

 

1.0

 

1.5

 

2.0

 

f = 16 kHz

 

Underlying in mm

 

0.5

 

1.0

 

1.5

 

+ 12 dB

 

f = 2.4 kHz

 

Eddy current inspection with EddyCation

C) Procedure for surface cracks

1. Use BK1 with slots turned up!

2. Put the probe on a slot-free spot and balance the system!

3. Turn the inclination signal horizontally to the left (use the lift-off automatics)!

4. Record the slot signals in one image best filling the XY-plane.

5. Optimise the frequency according to best crack depth discrimination!

 

A) Job

Optimise the setting for crack detection and evaluation!

 

B) Utensils

1. EddyCation BK1

2. Differential probe

 

 

F) Report

1. 3 EddyCation reports with all signals.

2. What frequency do you suggest for what job and why do you suggest it?

3. According to what signal parameters you may evaluate surface cracks?

4. According to what signal parameters you may evaluate hidden cracks?

5. How an insulation coating affects the results?

6. Discuss the opportunities and limits of eddy current crack detection and evaluation unsing a differential probe!

Crack detection with differential probe

Example: Open and hidden slots in aluminium

D) Procedure for hidden cracks

1. Use BK1 with slots turned down!

2. - 4. see C)

5. Optimise the frequency according to best discrimination of the crack underlying!

 

 

E) Procedure both crack types

1. Activate the logarithmic indication!

2. Turn the slots of BK1 down!

3. Put the probe on a slot-free spot and balance the system!

4. Inclination adjustment to the left!

5. Move the probe over the most underlying slot and open the gain until clearly recognising the slot signal!

6. Record the signal of all open and hidden slots!

 

Home

Basics

fxEddy

Training

 

Classic surface

 

Compact surface

 

Coin rejection

 

Sorting

 

Cracks (abs. probe)

 

Cracks (diff. probe)

 

Wall thickness

 

Coatings

Instruments

FAQs