ATA20 Positector AT Automatic Adhesion Tester with 20mm Dollies Complete Kit - ATA20A

Order Code	ATA20	ATA50	ATA50T	ATA50C
Dolly size and stand-off*	20 mm	50 mm	50 mm²	50 mm
Typical Applications	Higher bond strength coating on metal	Lower bond strength coatings on wood, concrete and plastic	BS EN 12004-2 Cementitious adhesives for tiles	ASTM C1583 Concrete surfaces and overlays
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
Resolution	0.01 MPa (1 psi)
Accuracy	± 1% Full Scale
Included Dollies	⌀20 mm (qty 20) Aluminum	⌀50 mm (qty 8) Aluminum	50 mm² Plate (qty 4) with threaded post Steel	⌀50 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).

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. 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.

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.

Examples

(based on above five layer illustration)

	20 mm Accessory Kit - AT-20-KIT 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 Accessory Kit - AT-50-KIT Interchangeable standoff allows a PosiTest ATM20 or ATA20 to pull 50 mm dollies Ideal for lower bond strength finishes such as coatings on 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)
	50 mm x 50 mm Tile Accessory Kit - AT50TKIT Ideal for measuring the tensile strength of ceramic tile cementitious, dispersion and reaction resin adhesives Conforms to BS EN 12004-2 Includes 50 mm x 50 mm steel dollies (4), and 50 mm x 50 mm stand-off
	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)
	Dollies (loading fixtures, stubs) Size Quantity Part Number 10mm dollies 10 AT-10 (DOLLY10) 14mm dollies 10 AT-14 (DOLLY14) 20mm dollies 10 AT-20 (DOLLY20) 50mm dollies 4 AT-50 (DOLLY50) 50 mm C1583 dollies 2 DOLLY50C 50 mm² Tile dollies 4 DOLLY50T 50 mm² Plate 4 PLATE50T
	Dolly Multipacks - Larger quantity at a reduced cost Size Quantity Part Number 10 mm dollies 100 DOLLY10APK100 14 mm dollies 100 DOLLY14APK100 20 mm dollies 100 DOLLY20APK100 50 mm dollies 50 DOLLY50APK100
	Drilling Template for 50 mm Dollies (Order Code: AT-TEMP) 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: AT-ADHESIVE) ResinLab EP11HT 2-Part Epoxy Additional glue, mixing sticks, palettes and cotton swabs Techincal Datasheet
	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.

Do your instruments require any formal training for use? Do you offer ‘demo’ models?
No. Our instruments are designed for simple operation, feature easy-to-use menus, both full and quick instruction manuals, and helpful videos. In lieu of demonstration models, we provide unlimited technical support via telephone and/or email, and a limited 30-day money back guarantee.

Is the PosiTest AT calibrated at the factory?
The PosiTest AT arrives fully calibrated and ready to measure. A Long-Form Certificate of Calibration traceable to NIST or PTB is included, which documents actual readings taken by your instrument at our calibration laboratory on standards traceable to a national metrology institute. Beware of ‘Certificates’ or ‘Certificates of Conformance’ offered by competitors. These typically do not include actual instrument readings, and are often insufficient to meet common quality requirements.

Is the PosiTest AT portable, and suitable for use in the field?
Absolutely. With an environmentally-sealed, metal enclosure, heavy-duty hydraulic pump and a high grade industrial pressure sensor, both the Manual and Automatic PosiTest AT are built to last. Weatherproof, dustproof and shockproof, they can be used indoors, outdoors and in all types of weather (meets or exceeds IP 65).
For added utility and convenience, PosiTest AT-A Automatic models also include a handy shoulder strap and rubberized grips.

Does the PosiTest AT include steel loading fixtures (dollies)?
The PosiTest AT is supplied with self-aligning dollies that are precision-manufactured from strong and lightweight aluminum alloy (6061-T6). As a lower-cost alternative to steel loading fixtures, factory aluminum dollies are a single-use/consumable item and ideal for keeping as a permanent visual record of testing.

Do you have a recommended adhesive for my particular application?
The ResinLab EP11HT epoxy adhesive supplied with the PosiTest AT is simple to use and suitable for testing a wide range of coating types. In some instances, specialized coatings will require a more specialized adhesive.

Is the PosiTest AT-A more accurate than the PosiTest AT-M?
The certified accuracy of both PosiTest AT models is identical. However, the fully automatic design of the PosiTest AT-A provides improved measurement consistency by eliminating the potential for operator influence from the test process.

What is the difference between the 20mm and the 50mm loading fixtures?
The 50 mm dolly is commonly recommended for use with concrete, wood and composite substrates, and measures coatings with expected adhesion values between 50 psi and 560 psi (50 - 500 psi for AT-M models). The 20 mm dolly is recommended for testing coatings applied to metals or with expected adhesion values greater than 500 psi.

Can I use the PosiTest AT-A on curved surfaces?
Yes. Feedback from our customers is that the PosiTest AT gages are suitable for testing most internal or external pipe applications greater than 200 mm in diameter. In such cases, the maximum glue gap between the surface of the 20 mm dolly and the coating is 0.5 mm. For smaller pipe diameters, depending on the expected pull-off strength of the coating, it may be possible to use a 10 mm or 14 mm dolly. External diameters can be decreased to as low as 50 mm and 100 mm, for the 10 mm and 14 mm dollies, respectively.
Manufacturers do do not provide or support the use of curved dollies for adhesion testing. In addition to affecting the surface area used in calculating pull-off strengths and the direction of the force lines (creating unwanted shear forces), most adhesion testing standards specifically call for the use of flat dollies.

How many measurements can I take with the PosiTest AT-A on a single battery charge?
The rechargeable battery pack (user replaceable) in the PosiTest AT-A can perform over 200 tests on a single charge. Use the included AC adaptor to continue testing as the battery recharges.

What is the lowest adhesion strength that the PosiTest AT-A can measure?
When utilized with a 50mm dolly, the PosiTest AT is in a priming state until reaching a priming pressure of 50 psi. It is only after the priming pressure is reached that the instrument begins calculating and displaying the pull rate.
While it is possible to obtain readings below this priming pressure with the AT-M model, the AT-A automatic does not allow the operator to build priming pressure very slowly and is therefore not suitable for use below the priming pressure of 50 psi.
Note that all reported adhesion values (including those obtained below the priming pressure) are subject to the PosiTest AT gage’s full-scale accuracy of ± 1% (± 30 psi, AT-M; ± 35 psi, AT-A).

Is there a faster curing adhesive than the epoxy supplied with the PosiTest AT?
The versatile epoxy adhesive supplied with the PosiTest AT reaches full cure within 24 – 48 hours. Operators who require faster cure times should evaluate other adhesives for their compatibility with both the coating being tested and our aluminum test dolly. Cyanoacrylate (‘super glue’) type adhesives are often sufficient for lower pull-off strengths.

Can I use the PosiTest AT on flexible or brittle substrates?
The PosiTest AT is designed for use with rigid, structural substrates. A flexible substrate can adversely impact test accuracy and repeatability. Furthermore, use of the PosiTest AT for measuring the adhesion of coatings applied to a brittle substrate typically results in the destruction of the substrate material, making it challenging to quantify the coating-substrate bond strength.

	Item	Description	Price
Add	ATA20	Positector AT Automatic Adhesion Tester with 20mm Dollies Complete Kit - ATA20A	$2,935.00
Accessories
Add	CASEATM-P	Pelican Case for PosiTest AT Manual Pull-Off Adhesion Testers	$250.00
Add	CASEATAB-P	Pelican Case for PosiTest AT Automatic Pull-Off Adhesion Testers	$370.00
Add	ATADHESIVEKIT	Additional Adhesive Kit - AT-ADHESIVE	$35.00
Add	TMPLTAS	Drilling Template for 50 mm Dollies - AT-TEMP	$135.00
	AT-Verify	REPLACED BY ATC1 Adhesion Tester Accuracy Verification Kit - ATVERIFY - Please contact us for pricing and availability.	$
Conversion Kits
Add	AT20KIT	Includes 20 mm stand-off, holesaw and 20 test dollies	$300.00
Add	AT50KIT	50mm Accessory Kit including 12 pcs. 50mm dollies, stand-off and hole saw	$300.00
Add	AT50CKIT	50 mm C1583 Conversion Kit - Includes 50 mm C1583 steel dollies (4), 50 mm diamond grit cutting tool with arbor and 50 mm C1583 stand-off	$535.00
Add	AT50TKIT	50 mm x 50 mm Tile Conversion Kit - Includes 50 mm x 50 mm steel dollies (4), and 50 mm x 50 mm stand-off	$505.00
Dollies
Add	DOLLY10	10mm Dollies - 10 Pack - AT-10	$50.00
Add	DOLLY14	14mm Dollies - 10 Pack - AT-14	$50.00
Add	DOLLY20	20mm Dollies - 10 Pack - AT-20	$35.00
Add	DOLLY50	50mm Dollies - 4 Pack, Requires Standoff Supplied in AT-50-KIT, old pn AT-50	$50.00
Add	DOLLY50C	50 mm C1583 Dollies - 2 Pack, Requires Standoff Supplied in AT50CKIT	$75.00
Add	DOLLY50T	50 mm2 Tile Dollies - 4 Pack, Requires Standoff Supplied in AT50TKIT	$165.00
Add	PLATE50T	50 mm2 Plate - 4 Pack, Requires Standoff Supplied in AT50TKIT	$115.00
Dolly Multipacks
Add	DOLLY10APK100	10mm Dollies - 100 Pack	$425.00
Add	DOLLY14APK100	14mm Dollies - 100 Pack	$425.00
Add	DOLLY20APK100	20mm Dollies - 100 Pack	$300.00
Add	DOLLY50APK50	50mm Dollies - 50 Pack, Requires 50mm Standoff Supplied in AT-50A-KIT. Not for use with AT-50C-KIT.	$550.00