Product Description
Technical Specification
Accessories
Instruction ManualData Sheet
Videos

Adhesion Verification Unit (AVU)

The Elcometer AVU has been designed to provide users with the means to confirm the accuracy of their pull-off adhesion gauge.

Due to its robust design the Elcometer AVU is suitable for use on site or in the laboratory and allows users to verify or self-certify their pull-off adhesion gauges.

A range of dolly adaptors are available for testing the Elcometer 106, Elcometer 506 and Elcometer 510 adhesion gauges. Adaptors are also available for testing other manufacturers’ gauges.

Attach the appropriate dolly adaptor to the AVU, connect your adhesion gauge, apply load and compare the adhesion tester value to the reading on the AVU Display.

Features include:

  • Max hold and live reading display
  • MPa / psi switchable units
  • Backlit display
  • Automatic switch off

The Elcometer AVU is supplied with either a test certificate or full calibration certificate, suitable for self-certification.

Adhesion Verification Unit (AVU)
Elcometer AVU used with Adhesion Tester

Technical Specification

Part Number

Description

Certificate

T99923924

Elcometer AVU Adhesion Verification Unit

T99923924C

Elcometer AVU Adhesion Verification Unit - Certified

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Range

0-30MPa (0-4000psi)

 

Resolution

0.01MPa (1psi)

 

Accuracy

±0.1MPa (±14.5psi)

 

Battery Type

2 x 1.5V AA Cells (Alkaline)

 

Gauge Dimensions

165 x 155 x 105mm (6.5 x 6.1 x 4.1”)

 

Gauge Weight

3kg (6.6lbs)

 

Packing List

Elcometer AVU, Elcometer 506/510 20mm (0.76”) dolly adaptor, test or calibration certificate (as appropriate), 2 x AA batteries, carry case and operating instructions

 

Test Certificate supplied as standard

ο Calibration Certificate supplied as standard

Accessories

T99923935

Elcometer 506 & 510 Dolly Adaptor; 20 & 14.2mm (0.76 & 0.56”) Skirts

T99923936

Elcometer 506 & 510 Dolly Adaptor; 50mm (2.0”) Skirt

T99923937

Elcometer 106 Dolly Adaptor; Scales 1 to 4

T99923938

Elcometer 106 Dolly Adaptor; Scale 6

T99923939

AT-M & AT-A Adhesion Gauge Dolly Adaptor

T99923986

PAT Adhesion Gauge Dolly Adaptor

Videos

1. An Introduction to Pull-Off Adhesion on Coated Surfaces

Adhesion testers are used to test how well a coating has adhered to a surface, as poor adhesion can lead to premature coating failures. The coating inspector has essentially three main methods to choose from - cross hatch, push off, and the most common, the pull-off adhesion test.

 

This video is part of a series on Pull-Off Adhesion Testing, to see the next video please click here.

To download the video script in English click here.

RELATED VIDEOS

1. An Introduction to Pull-Off Adhesion on Coated Surfaces
1. An Introduction to Pull-Off Adhesion on Coated Surfaces

Adhesion testers are used to test how well a coating has adhered to a surface, as poor adhesion can lead to premature coating failures. The coating inspector has essentially three main methods to choose from - cross hatch, push off, and the most common, the pull-off adhesion test.

 

This video is part of a series on Pull-Off Adhesion Testing, to see the next video please click here.

To download the video script in English click here.

//www.youtube.com/embed/pHvgjZZ3cRg
2. Selecting the Dolly Diameter and Gauge
2. Selecting the Dolly Diameter and Gauge

When it comes to selecting the dolly diameter and adhesion gauge type to use for a pull-off adhesion test; factors such as the substrate material, the substrate shape, and the expected coating strength will affect the dolly or gauge the user chooses.

 

This video is part of a series on Pull-Off Adhesion Testing, to see the next video please click here.

To download the video script in English click here.

//www.youtube.com/embed/NQdcl-EyEJU
3. Selecting the most Appropriate Position for an Adhesion Test
3. Selecting the most Appropriate Position for an Adhesion Test

When preparing a pull-off adhesion test, whilst the actual location and the number of pulls is typically defined by the test method or procedure that’s being followed, the actual positioning of the dolly is vital, as poor positions can result in low pull-off values or invalid tests.


 

This video is part of a series on Pull-Off Adhesion Testing, to see the next video please click here. 

To download the video script in English click here.

 

//www.youtube.com/embed/s30uCK_U44w
4. Preparing the Dolly and the Coating
4. Preparing the Dolly and the Coating

Properly preparing the dolly and the surface before performing a pull-off adhesion test will help achieve higher pull-off values.

 

This video is part of a series on Pull-Off Adhesion Testing, to see the next video please click here.

To download the video script in English click here.

 

//www.youtube.com/embed/UJYYe_NZ9YQ
5. To Cut or Not to Cut?
5. To Cut or Not to Cut?

Should the coating around a dolly be cut, or left uncut prior to a pull-off adhesion test; and whose decision is it to make?

 

This video is part of a series on Pull-Off Adhesion Testing, to see the next video please click here.

To download the video script in English click here.

//www.youtube.com/embed/avSFGkyVAd8
6. The Pull-Off Test
6. The Pull-Off Test

Once the glue between a properly prepared dolly or pull stub and a properly prepared coating has fully cured, the pull-off adhesion test can be undertaken using the adhesion tester of choice.

 

This video is part of a series on Pull-Off Adhesion Testing, to see the next video please click here.

To download the video script in English click here.

 

//www.youtube.com/embed/uJXt0Pbrj0k
7. Assessing the Result; Glue, Adhesive and Cohesive Failures
7. Assessing the Result; Glue, Adhesive and Cohesive Failures

Once the pull-off adhesion test has been completed the tensile pull-off force, whether the coating was coat or not, the dolly size and gauge type, and the failure mode of the coating are all recorded; with the nature of the failure usually recorded as an estimated percentage to the nearest 10%.

 

 

To download the videoThis video is part of a series on Pull-Off Adhension Testing, to view the playlist please click here.

To download the video script in English click here.

//www.youtube.com/embed/2OG23w7Ww9Q
<P> 8. Measuring the Pull-Off Adhesion of Coatings on Concrete</P>

 8. Measuring the Pull-Off Adhesion of Coatings on Concrete

Testing coating adhesion on concrete substrates using a pull-off adhesion gauge is similar to testing coatings on metal substrates. However, there are a number of differences in the test procedures and equipment used.

 

This video is part of a series on Pull-Off Adhension Testing, to view the series playlist please click here.

To download the video in script in English click here.

//www.youtube.com/embed/CoURXuYVnAg