R
5
2.3 APPLY LOAD TO DOLLY
1.
Place the base support ring over the dolly ensuring that it lies flat on the surface.
2.
Slacken the nut on the Adhesion Tester. Set the dragging indicator to zero (0) on the scale and
carefully engage the claw with the dolly.
3.
Hold the Adhesion Tester steady with one hand to prevent rotation and tighten the nut with the wrench
slowly and evenly to apply an increasing force to the dolly and hence stress to the coating. Continue
until the dolly is removed from the surface, or until the specified stress is reached. The value is read
from the position of the dragging indicator after the test is complete.
According to Standards, the load should be applied uniformly. The wrench should be rotated without
stopping. Calculate the time the stress should be increased over and practice before testing. This table
shows how many seconds each turn should take. Some Standards allow a slower rate (more seconds)
up to a maximum time.
There will be a loud bang and the Adhesion Tester may jump up a few centimetres as the
dolly and coating detach and the energy in the tester is released. For personal safety it is
recommended that the operator does not lean over the Adhesion Tester during use.
4.
Immediately after the test is complete and the stress has been recorded, slacken the nut by reversing
the wrench to remove all the force from the unit.
Elcometer 106
Stress Rate, s/turn (See Standard)
Scale
Max MPa
MPa/turn
1MPa/s
0.2MPa/s
0.05MPa/s
0.035MPa/s
6
3.5
0.40
0.4
2.0
8
11.4
