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DeFelsko PosiTest® AT-A Automatic Adhesion Tester for testing coatings adhesion on metal, wood, concrete, and other rigid substrates. The AT-A’s electronically-controlled hydraulic pump is push-button-operated, eliminating the need for manual priming, or pumping of the hydraulic system.
PosiTest AT-A also features a new high-resolution, impact and scratch-resistant, colour Touch Screen display with controls identical to the digital keypad. A full digital keypad allows the user to select pull-off pressure, pull rate, dolly size, as well as to change measurement units or store readings in the gauge. User-selectable pull rate, pull limit, dolly size, and hold time, ensure conformance to international standards for a wide range of test applications.
Additional new features of the Automatic Adhesion Tester include the ability to record Pass/Fail results and identify the type of coating failure – cohesion, adhesion, and glue failures. Internal memory stores data for up to 100,000 pulls in up to 1,000 batches, including maximum pull-off pressure, rate of pull, test duration, dolly size, and the pass/fail information.
The rubberized, impact-resistant end caps on the PosiTest Automatic Adhesion Tester provide an ergonomic grip, and stable, skid-resistant footing. AT-A also features a built-in, rechargeable NiMH battery, shoulder strap, and AC power option for greater versatility and convenience of use. Both models of PosiTest Adhesion Tester have the PosiTest Self-Aligning Dolly System which allows the dolly-head to articulate in the actuator to compensate for uneven surfaces, making possible a proper, vertical pull, and ensuring reliable, repeatable test results.
Features:
- Portable; requires no external power source
- Pull-rate indicator allows user to monitor and adjust rate of pull
- Internal Memory stores maximum pull-off pressure, rate of pull, test duration, and dolly size
- Environmentally-sealed enclosure is weatherproof, dustproof, and shockproof; ingress protection IP65
- Self-Aligning Dolly System to enable accurate measurements on smooth or uneven surfaces
- 10, 14, 20, or 50 mm dollies maximize capability and accuracy across a wide range of bond strengths:
- 10 mm: 10000 psi (70 MPa)
- 14 mm: 6000 psi (40 MPa)
- 20 mm: 3000 psi (20 MPa)
- 50 mm: 480 psi (3.3 MPa)
- 50×50 mm: 375 psi (2.585 MPa)
- Large, easy-to-read LCD display of pressure, rate of pull, and holds maximum test value
- Calibration and certification to + 1% accuracy, using NIST-traceable load cell
- 2-year manufacturer’s warranty
- Conforms to national and international standards including ASTM D4541/D7234, ISO 4624/16276-1, AS/NZS 1580.408.5 and others
Features Unique to the updated PosiTest AT-A Automatic Adhesion Tester include:
- Electronically-controlled hydraulic pump; automatically applies smooth and continuous pull-off pressure, reducing effort and risk of user influence on pulling process
- Pull-off strength of up to 3500 psi (24 MPa, 7550 N) with 20 mm dollies
- Full digital keypad controls of all aspects of the adhesion test
- Impact-resistant, high-resolution, colour Touch Screen display with fully redundant keypad, enables operation with or without gloves
- User-selectable dolly size, pull rate, pull limit, pull-off pressure, hold time, memory storage at the push of a button
- Wireless connection to your smart device using free PosiTector mobile app to create and share customized, professional PDF reports
- Record results as Pass/Fail, and the nature of the failure – cohesion, adhesion, glue failure
- Compatible with PosiSoft Desktop, PosiTector App, PosiSoft.net, and PosiSoft USB Drive
- Environmentally-sealed metal enclosure ingress-protected to IP65
- Impact and scratch-resistant display
- Heavy-duty hydraulic pump with high-grade industrial pressure sensor
- Rubberized, impact-resistant end caps for sure, comfortable grip, and skid resistant footing
- Built-in, rechargeable battery performs 200 or more test on a charge; testing can continue on AC-power while battery is being recharged
- Universal AC-adaptor battery charger
Four kit options are available for the DeFelsko PosiTest AT-A Automatic Adhesion Tester:
| Kits | 20 mm Kit | 50 mm Kit | 50 x 50 mm Tile Kit | 50 mm C1583 Kit |
| Range | 0.7 – 20 MPa 100 – 3000 psi | 0.4 – 3.3 MPa 50 – 480 psi | 0.4 – 2.585 MPa 50 – 375 psi | 0.4 – 3.3 MPa 50 – 480 psi |
| Typical Application | Higher bond strength coatings on metal substrates | Lower bond strength coatings on wood, concrete, and plastic | Cementitious adhesive for tiles | Concrete surfaces and overlays |
| Included Dollies | ø20mm (qty 20) Aluminum | ø50 mm (qty 83) Aluminum | 50 x 50 mm Plate (qty 4) with threaded post Steel | ø50 mm (qty 4) with > 25 mm thickness Steel |
| Cutting Tool | 20 mm hole saw | 50 mm hole saw | – – | 50 mm diamond grit hole saw with arbor |
| Adhesive | ResinLab EP11HT 2-Part Epoxy | ResinLab EP11HT 2-Part Epoxy | ResinLab EP11HT 2-Part Epoxy | ResinLab EP11HT 2-Part Epoxy4 |
| Resolution | 0.01 MPa (1 psi) | 0.01 MPa (1 psi) | 0.01 MPa (1 psi) | 0.01 MPa (1 psi) |
| Accuracy | + 1% Full Scale | + 1% Full Scale | + 1% Full Scale | + 1% Full Scale |
In addition, Conversion Kits are available for all dolly types: 20 mm, 50 mm low bond-strength, 50 x 50 mm Tile Conversion Kit, and 50 mm C1583 Conversion Kit. The addition of any conversion kit to the allows the PosiTest AT-A to be used in a broad range of applications.
Stone Tucker Instruments is able to certify your PosiTest Automatic Adhesion Tester.
