5
2.3 APPLYING LOAD TO THE DOLLY
1. Cut around the base of the dolly very carefully using the dolly
cutter. This is only necessary when lateral bonding in the
coating is greater than adhesion, for example, elastomeric
coatings.Place the base support ring over the dolly ensuring
that it lies flat on the surface.
2. Slacken the handwheel or nut on the Adhesion Tester. Set the
dragging indicator to zero (0) on the scale and engage the
claw carefully with the dolly.
3. Hold the Adhesion Tester steady with one hand to prevent
rotation and tighten the handwheel or nut slowly and evenly to
apply an increasing force to the dolly and hence to the coating.
Continue until the coating fails and the dolly is removed from
the surface, or until the specified test force is indicated. The
pull-off force is read from the position of the dragging indicator
after the test is complete.
Note: The force should be applied evenly over a time period
not exceeding 90 seconds. Avoid jerking the tester as this will
add unwanted forces to the test area.
106_TMA_0003_00_06.fm Page 5 Wednesday, January 21, 2009 3:21 PM
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