DeFelsko's Positest AT-A is an automatic Pull Off Adhesion Test System, it measures adhesion of coatings to metal, wood, concrete and other rigid substrates.
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The system uses its hydraulic pump to pull the dolly which has been glued to substrate and record the force applied when the failure happens. It is widely used in construction QA process as a time-saving and reliable method to ensure there is sufficient adhesion between the coating and substrate. The manufacturer DeFelsko has been one of the most leading supplier of coating testing and inspection instruments since 1965.
Video
Manual and Automatic Modes
The systems are available in both Manual and Automatic modes.
PosiTest AT-M Manual
Manual hydraulic pump designed to apply smooth and continuous pressure with a single stroke
Pull rate indicator to manually monitor and adjust the rate of pull
Internal memory stores maximum pull-off pressure, rate of pull, test duration and dolly size for up to 200 pulls
Compatible with PosiSoft desktop software
PosiTest AT-A Automatic
Impact and scratch resistant colour touch screen with keypad for operation with or without gloves.
Electronically controlled hydraulic pump automatically applies smooth and continuous pull-off pressure. greatly reduces user effort and the risk of influencing the puling process
User adjustable pull rate, pull limit and hold time
Built-in rechargeable battery performs over 200 tests per charge. Continue testing with AC power while the battery recharges
Internal memory stores maximum pull-off pressure, rate of pull, test duration, dolly size, pass/fail, the nature of fracture and user notes for 100,000 pulls in up to 1,000 batches
Compatible with PosiSoft desktop software, PosiSoft.net and PosiTector App
PosiSoft USB Drive- stored readings and graphs can be accessed using universal PC/Mac web browsers or file explorers. No software required
WIFI technology wirelessly communicates with PosiSoft.net and downloads software updates
Rubberised, shock absorbing grips also provide a stable, skid-resistant footing
Add images and notes using camera and keyboard
Create customised, professional PDF reports
Share, backup, synchronise and report measurement date
Auto-pairing Bluetooth connection
All Models Feature...
Environmentally sealed enclosure- weatherproof, dust proof and shockproof- meets or exceeds IP65
Inexpensive, single-use dollies eliminate cleaning for re-use and can be kept as a permanent record
Conforms to international standards including ASTM D4541/D7234, ISO 4624/16276-1, AS/NZS 180.408.5 and others
10, 14, 20 or 50mm dollies maximise capability and measurement resolution across a wide range of bond strengths
Calibrated and certified to ± 1% accuracy using a NIST traceable load cell
Self-Alignment Feature
The PosiTest Adhesion Tester compensates 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.
Ordering Guide
All Kits inclusions
Adhesion Tester, built-in rechargeable NiMH battery with charger and dollies
Abrasive pad, cutting tool, glue with mixing sticks and palettes and cotton swabs
USB cable and PosiSoft Software
Shoulder strap (AT-A only), instruction booklet and video
Certificate of calibration traceable to NIST, two-year warranty
Sturdy and lightweight carrying case
Order Code
ATA20
ATA50
ATA50T (EN 12004-2)
ATA50C (ASTM C1583 and EN 1542)
Dolly size and stand-off*
20 mm
50 mm
50x50 mm
50 mm
Typical Applications
Higher bond strength coatings on metals
Lower bond strength coatings on wood, concrete and plastic
Cementitious adhesives for tiles
Concrete surfaces and overlays
Range
0.7 – 24 MPa 100 - 3500 psi 220 - 7550 N
0.1 – 3.8 MPa 15 - 560 psi 220 - 7550 N
0.1 – 3.0 MPa 13 - 440 psi 220 - 7550 N
0.1 – 3.8 MPa 16 - 560 psi 220 - 7550 N
Resolution
0.01 MPa (1 psi)
Accuracy
±1% Full Scale
Included Dollies
Ø20 mm (qty 20) Aluminum
Ø50 mm (qty 8) Aluminum
50x50 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
* Optional 20mm/50mm/50 mm C1583/50 mm Tile Conversion Kits allow each model to be used with alternative dolly sizes. Custom 10 and 14 mm dollies are available for special applications (compatible with 20 mm stand off).
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