Heat exchangers come in many shapes and sizes. Several variables, such as material, outside diameter, and wall thickness, have an effect on which technology and probe are appropriate to inspect the exchanger. Tube testing can be confusing, but this webinar will help to demystify it by exploring the theory behind tube testing and showing a complete hands-on demo using the NORTEC 600D flaw detector with the HVAC and Heat Exchanger kit. This kit enables inspectors to use eddy current technology (ECT), remote field technology (RFT), and near field technology (NFT) just as they would with a MultiScan 5800™ tube inspection system, but with much greater portability. This solution is ideal for newcomers to the tube testing market as well as experienced inspectors that want to revamp their fleet with a highly portable system. This presentation is technically advanced and is addressed to NDT operators and engineers. Presenter: Terence Burke Product Applications Leader, Eddy Current and Bond Testing Based in Quebec City, Canada, Terence has been with Olympus for several years. He started as an intern and worked his way up to the Product Management team. Today, his responsibilities include answering customer questions about tube testing and conducting training on Olympus eddy current products. Learn more: https://www.olympus-ims.com/en/resources/webinars/inspecting-hvac-and-heat-exchangers-using-the-nortec-600d-flaw-detector/

1. 1
HVAC and Heat Exchanger
Tubing Kit and NORTEC 600D
Understand tube testing using the latest adaptor kit and NORTEC 600D
September 2018
Olympus America Inc. | Terence Burke
Quebec City, Canada

2. Agenda
• What’s in the box
• Key points for a great demo
• Eddy current inspection
• Common connections
• Differential
• Absolute
• Remote field inspection
• Common connections
• Differential
• Absolute
• Near field inspection
• Common connections
• Differential
• Absolute
• Conclusion

3. What’s in the box
1- Splitter box: Used to connect the adaptor
and footpedals into the instrument
2- ECT adaptor: Used to inspect non-
ferromagnetic tubes
3- NFT differential adaptor: Used to inspect
finned ferromagnetic tubes
4- NFT absolute adaptor: Used to inspect
finned ferromagnetic tubes
5- RFT adaptor: Used to inspect
ferromagnetic tubes
HX-ADPT-KIT

4. What’s in the box
6- Foot pedal cable: Used to connect foot pedals
to splitter box
7- Foot pedals
HX-ADPT-KIT

5. What’s in the box
11- RFT calibration tube: Long defects for
absolute calibration
12- ECT calibration tube: Pits for differential
calibration
13- ECT finned calibration tube:
Circumferential defect and hole to be used
with A/C probe
14- ECT calibration tube: Long defects for
absolute calibration
8- NFT calibration tube: Tapered ends and 3 pits in
the middle section
9- RFT calibration tube: Pits for differential
calibration
10 & 15- Support rings: One for ECT then other
RFT
N600-DEMO-KIT

6. What’s in the box
All the necessary probes
• TEA
• TEC
• TRS
• TRX
• TRD
N600-DEMO-KIT

7. Key points for a great demo
• The user must have a minimum knowledge of
the NORTEC 600 and tube testing
• The H Gain and V Gain must always be equal
• The pedals must be shown to the client
• Use the pedals to Null/Balance
• Use Erase when:
• A defect is found
• Too much clutter on the screen

8. Eddy Current Inspection
Connect as follows
• Splitter to NORTEC 600D
• Adaptor to splitter
• Foot pedal cable to splitter
• Foot pedal cable to foot pedal

9. Eddy Current Differential
What you need
• Bobbin probe (TEA/TEB)
• Calibration standard with known
diameter and wall thickness, and
support ring

10. Eddy Current Differential
Select ECT Pitting, Wear, and Cracks
via the Applications menu

11. Eddy Current Differential –
Frequency 1 Setup
This method will allow us to use the Auto Mix function, thus allowing the user to see defects under the support. Freq 1 can
be accessed with the Main/Filter button.
• Step 1: Set Freq 1 to F90
• F90 is the frequency that will give an ID and OD defect a 90 degree phase difference
• Step 2: Scan the calibration tube
• Make sure the support is placed in a defect free area
• Step 3: Set the hole signal at 40 degrees and 6 vertical divisions.
• Step 4: Adjust the gain to avoid any signal clipping on the support signal
Signal clipping is when the signal goes off-screen

12. Eddy Current Differential –
Frequency 2 Setup
To access Frequency 2 settings press the Main/Filter button. To see frequency 2 press DISP and select FREQ2.
• Step 1: Set Freq 2 to F90/2
• F90/2 will be used to subtract the support signal. It is half of frequency 1.
• Step 2: Scan the calibration tube
• Make sure the support is placed in a defect free area
• Step 3: Set the gain as high as possible to avoid any signal clipping on the support signal
• Signal clipping is when the signal goes off-screen
• Step 4: Set the support signal horizontal

13. Eddy Current Differential – Auto
Mix Setup
To access Auto Mix settings press the Main/Filter button. However, stay on the FREQ2 display for now.
• Step 1: Press AUTOMIX
• Scan the support ring only.
• Step 2: Change the DISP to All-In-1
• Make sure the support is placed in a defect free area
• Step 3: Set the rotation and the gain on the MIX channel
• Set the hole at 40 degrees and 4 to 6 divisions
• Step 4: Adjust the positioning of all 3 signals
• Freq1 - Impedance
• Freq2- Strip
• Mix - Impedance

14. Eddy Current Differential – What
you should see
Once completed, the
signals should be
properly mixed out

15. Eddy Current Differential – Using
a TEC probe
• The bobbin coils are calibrated like the a regular TEA
probe
• The A/C coils are not calibrated

16. Eddy Current Absolute
• Select ECT Erosion and Corrosion via the Applications
menu
• Only one frequency used
• Simpler setup

17. Eddy Current Absolute
What you need:
• Bobbin probe (TEA/TEB)
• Calibration standard with known diameter and wall
thickness

18. Eddy Current Absolute –
Frequency Setup
• Step 1: Set Freq1 to F90/2
• F90/2 was calculated previously
• Step 2: Scan the calibration tube
• Make sure the support is placed in a defect free area
• Step 3: Set the gain and rotation
• Set the 20% outer diameter (OD) defect to 1 horizontal division and 4 vertical divisions.
• The rotation of the defect should be 100 degrees from the origin

19. Eddy Current Absolute– What
you should see
Once completed, the
signals should look like
this

20. Remote Field
Connect as follows:
• Splitter to NORTEC 600D
• Adaptor to splitter
• Foot pedal cable to splitter
• Foot pedal cable to foot pedal

21. Remote Field Differential
What you need
• Dual exciter RFT probe (TRX)
• Calibration standard with known diameter and wall
thickness, and support ring with pits

22. Remote Field Differential
Select RFT Pitting and Wear via the Applications menu

23. Remote Field Differential –
Frequency 1 Setup
This method will allow us to use the Auto Mix function, thus allowing the user to see defects close to the support.
• Step 1: Set Freq 1 to 400 Hz
• Step 2: Scan the calibration tube
• Scan the hole only
• Step 3: Adjust the rotation and gain
• The hole signal must be at 90 degrees and 4 to 6 vertical divisions.
• Step 4: Set the gain as low as possible to avoid any signal clipping on the support signal
• Signal clipping is when the signal goes off-screen

24. Remote Field Differential –
Frequency 2 Setup
To access Frequency 2 settings press the Main/Filter button. To see frequency 2 press DISP and select FREQ2.
• Step 1: Set Freq 2 to 200 Hz
• 200 Hz will be used to subtract the support signal. It is half of frequency 1.
• Step 2: Scan the calibration tube
• Make sure the support is placed in a defect free area or over the smallest defect
• Step 3: Set the gain as low as possible to avoid any signal clipping on the support signal
• Signal clipping is when the signal goes off-screen
• Step 4: Set the support signal horizontal

25. Remote Field Differential – Auto
Mix Setup
To access Auto Mix settings press the Main/Filter button. However, stay on the FREQ2 display for now.
• Step 1: Press AUTOMIX
• Scan the support ring only.
• Step 2: Change the DISP to All-In-1
• Make sure the support is placed in a defect free area
• Step 3: Set the rotation and gain on the MIX channel
• Adjust the hole signal so that it is 90 degrees and 4 to 6 vertical divisions
• Step 4: Adjust the positioning and display type of all 3 signals
• Freq1 – Impedance, Freq2- Strip, Mix - Impedance

26. Remote Field Differential – What
you should see
Once completed, the
signals should be
properly mixed out

27. Remote Field Absolute
Select RFT Erosion and Corrosion via the Applications menu
Only one frequency used
Simpler setup

28. Remote Field Absolute
What you need:
• Single Exciter RFT probe (TRS)
• Calibration standard with known diameter and wall thickness and short
defects

29. Remote Field Absolute –
Frequency Setup
• Step 1: Set frequency to 400Hz
• Step 2: Scan the calibration tube
• Make sure your calibration has a 60% groove
• Step 3: Set the gain and rotation
• Set the 60% groove to about 90% of the screen height
• The rotation of the defect should be about 85 degrees

30. Remote Field Absolute– What
you should see
Once completed, the
signals should look like
this

31. Near Field
Connect as follows
• Splitter to NORTEC 600D
• Near field probe (TRD)
• Foot pedal cable to splitter
• Foot pedal cable to foot pedal

32. Near Field Differential
What you need
• NFT Differential adaptor
• Calibration standard

33. Near Field Differential
Only one frequency will be used.
• Step 1: Set frequency to 400 Hz
• Step 2: Scan the calibration tube
• Make sure you identify the hole signal
• Step 3: Set the hole signal at 90 degrees and 6 to 8 vertical divisions.
• Step 4: Add a sweep display

34. Near Field Differential – What
you should see
Once completed, the
signals should look like
this

35. Near Field Absolute
What you need
• NFT Absolute adaptor
• Calibration standard

36. Near Field Absolute
Only one frequency will be used.
• Step 1: Set frequency to 400 Hz
• Step 2: Scan the calibration tube
• Step 3: Set the 60% groove signal at 90 degrees and 6 vertical divisions.
• Step 4: Add a sweep display

37. Near Field Absolute – What you
should see
Once completed, the
signals should look like
this

38. A few more things…
• Watch the more advanced videos for more information on each technology
• MS5800 probes are compatible with the adaptors, excluding the magnetic flux leakage probes and IRIS
• HVAC (ECT only) and Full kit available
• N600D only!
• Will not replace the MS5800
• When in doubt contact Tubetesting@Olympus-ossa.com

39. Conclusion
The demo portion has been covered.
When visiting clients be careful of the following:
• The probes will not work for all materials
• Fill factor is important
• The right technology for the right job