PosiTest ATA20A-B Automatic Pull-Off Adhesion Tester with 20mm Dollies Kit, for Coatings on Metals, Range 0.7 - 24 MPa / 100 - 3500 psi / 100 - 7550 N

The Positest AT-A Automatic Adhesion Tester measures the force required to pull a specified test area of coating away from a substrate using hydraulic pressure. An electronically controlled hydraulic pump automatically applies smooth and continuous pull-off pressure. The pump greatly reduces user effort and the risk of influencing the pulling process.

The AT-A's built-in rechargeable battery performs over 200 tests per charge. The supplied AC adapter / charger allows you to continue testing with AC power while the battery recharges.

The AT-A is features an environmentally sealed enclosure. It is weatherproof, dustproof and shockproof. Meeting or exceeding IP65 rating.

Features

• Select from four Stand-offs - 20 mm, 50 mm, 50x50 mm Tile and 50 mm C1583
• Environmentally sealed enclosure weatherproof, dustproof and shockproof - meets or exceeds IP65
• Inexpensive, single-use dollies eliminate cleaning for re-use and can be kept as a permanent record
• Self-aligning aluminum dolly enables accurate measurements on smooth or uneven surfaces
• 10, 14, 20 or 50 mm dollies maximize capability and measurement resolution across a wide range of bond strengths
• Calibrated and certified to 1% accuracy using a NIST traceable load cell
• Conforms to international standards including ASTM C1583/D4541/D7234/D7522, ISO 4642/16276-1, BS EN 12004-2, AS/NZS 1580.408.5 and others
• Electronically controlled hydraulic pump automatically applies smooth and continuous pull-off pressure. Greatly reduces user effort and the risk of influencing the pulling process
• Impact and scratch resistant color touch screen with keypad for operation with or without gloves
• Built-in rechargeable battery performs over 200 tests per charge. Continue testing with AC power while the battery recharges.
• Rubberized, shock absorbing grips provide a stable, skid-resistant footing
• 10, 14, 20 or 50 mm dollies maximize capability and measurement resolution across a wide range of bond strengths. Maximum pull-off pressure by dolly size:
  • 10 mm: 14000 psi (96 MPa)
  • 14 mm: 7000 psi (50 MPa)
  • 20 mm: 3500 psi (24 MPa)
  • 50 mm: 560 psi (3.8 MPa)
• User selectable measurement units: psi (pounds per square inch), MPa (Megapascal), Nmm2 (Newtons per millimeter square) or Newton (force)
• User adjustable pull rate, pull limit and hold time
• Rotating display for horizontal and vertical use
• Software Updates via web keep your instrument current

Model Comparison

ATA20	ATA50	ATA50T	ATA50C
Dolly Size & Standoff
20 mm	50 mm	50 X 50 mm	50 mm
Typical Applications
Coatings onMetal	Coatings on Concrete, Woodand Plastic	Tile Adhesion StrengthConforms to BS EN 12004-2	Concrete Surfaces and Overlays Conforms to ASTM C1583
Range
0.7 - 24 MPa 100 - 3500 psi 100 - 7550 N	0.4 - 3.8 MPa 50 - 560 psi 100 - 7550 N	0.4 - 3.033 MPa 50 - 440 psi 100 - 7550 N	0.4 - 3.8 MPa 50 - 560 psi 100 - 7550 N

ATA Self-Alignment Feature

Unequal pulling force during testing caused by uneven adhesive bond lines and coating surfaces can result in random, unexplainable readings. To obtain more repeatable and meaningful adhesion measurements, it is imperative that the pulling force applied to the test dolly is uniformly distributed over the surface being tested.

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Both the PosiTest AT-M manual and PosiTest AT-A automatic models compensate for misalignment. The self-aligning, quick-coupling actuator and spherical articulating dolly head enable uniform distribution of the pulling force over the surface being tested, preventing a one-sided pull-off

Memory and Reporting Features

• Internal memory stores maximum pull-off pressure, rate of pull, test duration and dolly size for 100,000 pulls in up to 1,000 batches
• Record the results as pass/fail and the nature of fracture - cohesive, adhesive and glue failures
• Wirelessly connect to your smart device using our free PosiTector App (Apple iOS and Android)
• WiFi technology wirelessly communicates with PosiSoft.net, downloads software updates and allows access to stored measurement data using standard web browsers
• PosiSoft USB Drive - stored readings and graphs can be accessed via USB using universal PC/Mac web browsers or file explorers. No software required
• Compatible wit PosiSoft Desktop, PosiSoft.net and PosiTector App (Apple iOS and Android) software solutions

PosiTector App Features Add images and notes using the camera or keyboard Create customized, professional PDF reports Share, backup, synchronize and report measurement data Auto-pairing Bluetooth (BLE) connection

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Touch Screen Display

Use the touch screen to interact with menu options. Swipe horizontally to navigate between views or vertically to move between batch readings. Alternatively, the keypad can be used for navigation and selection.

User adjustable dolly size, pull rate, pull limit and hold time.

Batch summary provides an at-a-glance review of test results

View test parameters and reading results. Reading is recorded as pass or fail based on set test parameters. The pass/fail results can be revised.

Notes can be added for each reading

Include a note for a batch (group) of readings

Record the nature of failure - cohesive, adhesive and glue failures

Recording the Nature of the Fracture

Upon completion of a pull-off test, the dolly and coated surface should be examined. In addition to pull-off force, many National and International standards such as ASTM D4541 and ISO 4624 require the nature of the fracture to be recorded.

Cohesive fracture:fracture occurs within a coating layer (same coating on dolly face and coated surface). Adhesive fracture:fracture occurs at the interface between layers (coating on dolly face differs from surface). Glue failure:visible separation of the glue from itself, the coating or dolly (no coating visible on the dolly face).

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The cohesive and adhesive fracture visual analysis can be recorded using the PosiTest AT-A's keypad or touch screen display. Alternatively, the information can be reported using the PosiTector App.

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Fractures are visually estimated and recorded as a percent of each. The two layer example below illustrates a cohesive fracture within coating layer 1 and layer 2 (visually estimated at 50% each). Recorded results are included in reports.

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Examples
(based on above five layer illustration)

Optional Accessories

Dollies Loading fixtures, stubs for adhesion testing. Choose from the following sizes and quantities: Size Quantity Order Code 10 mm 10 DOLLY10 14 mm 10 DOLLY14 20 mm 10 DOLLY20 50 mm 4 DOLLY50

Dolly Multipacks Larger quantity of dollies at a reduced cost. Select from the following multipacks Size Quantity Order Code 10 mm 100 DOLLY10APK100 14 mm 100 DOLLY14APK100 20 mm 100 DOLLY20APK100 50 mm 50 DOLLY50APK50

20 mm Conversion Kit Order Code: AT20KIT Interchangeable stand-off allows a PosiTest ATM20 or ATA20 to pull 10, 14 and 20 mm dollies Ideal for high bond strength finishes such as coatings on metal Includes 20 mm stand-off, 20 mm hole saw and 20 mm aluminum test dollies (20)

50 mm Conversion Kit Order Code: AT50KIT Interchangeable stand-off allows a PosiTest ATM20 or ATA20 to pull 50 mm dollies Ideal for lower bond strength finishes such as coatingson wood, concrete and plastic Larger surface area of dolly provides improved low range precision and repeatability Includes 50 mm stand-off, 50 mm hole saw and 50 mm aluminum test dollies (12)

Drilling Template for 50 mm Dollies Order Code: TMPLTAS Drilling template and drill bits to isolate test area, ideal for thicker coatings on concrete Includes (10) drill bits 5/32" (4 mm)

Glue Kit Order Code: ATADHESIVEKIT ResinLab EP11HT 2-Part Epoxy Additional glue, mixing sticks, palettes and cotton swabs

50 mm x 50 mm Tile Accessory Kit - AT50TKIT Interchangeable standoff allows a PosiTest ATM50 or ATA50 to pull 10, 14 and 20 mm dollies Ideal for high bond strength finishes such as coatings on metal Includes 20 mm stand-off, 20 mm hole saw and 20 mm aluminum test dollies (20)

50 mm C1583 Accessory Kit - AT50CKIT Ideal for measuring the tensile strength of concrete surfaces and concrete repairs and overlay materials Conforms to ASTM C1583 Includes 50 mm C1583 steel dollies (4), 50 mm diamond grit cutting tool with arbor and 50 mm C1583 stand-off NOTE: Drill required (not included)

Pelican Case for PosiTest AT Pull-Off Adhesion Testers (Order Code: CASEATAB-P) Heavy-duty, waterproof Pelican cases complete with a custom foam insert to securely hold your PosiTest instrument

Complete Kit

The PosiTest AT kits come complete with Automatic Adhesion Tester, built-in rechargeable NiMH battery with charger, dollies, abrasive pad, cutting tool, glue with mixing sticks and palettes, cotton swabs, USB cable, PosiSoft Software, instruction booklet and video, shoulder strap, Certificate of Calibration traceable to NIST, two-year warranty, and a sturdy, lightweight carrying case.

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Photo Gallery

Video

Downloads

PosiTest AT-A Automatic Pull Off Adhesion Tester - Instruction Manual

PosiTest AT-A Automatic Pull Off Adhesion Tester -Data Sheet

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