3 (continued)SECURING THE DOLLY
www.elcometer.com
en-4
R
Fit the batteries (see Section 9.1 on page en-8) and once the
appropriate dolly skirt is attached to the actuator:
b
1 Turn the crank handle anti-
clockwise until it is fully
unwound.
2 Turn the coarse adjustment
screw anti-clockwise until it is
fully unwound.
3 Ensure the quick connect
coupling is fully depressed.
4 Zero the pressure gauge, see
Section 4.1 on page en-5.
5 Select the measurement units; or (see Section 9.3 on
page en-9).
MPA PSI
6 Select the dolly size (see Section 9.4 on page en-9).
4 PREPARING THE GAUGE FOR TEST
3.2 50mmTESTING COATINGS ON CONCRETE USING DOLLIES
When testing coatings on concrete using 50mm dollies, scoring of the
coating down to, or into, the surface of the concrete may be required.
1 If testing on coatings thicker than
0.5mm (20mils) use the 50mm dolly
cutter and arbor (mounted in a drill
press or hand drill) to cut a “ring” into
the concrete.
2 Follow steps 1-4 in Section 3.1, making
sure the dolly is positioned inside the
cut “ring”.
To score coatings thinner than 0.5mm (20mils), a sharp knife may be
sufficient to carefully score around the dolly once it has been secured
in place by adhesive.
4 Ensure that the scoring is perpendicular to the
coating and that the test area is not subjected to
twisting or torque. To minimise heat and
suppress dust, water lubrication may be
required.
Concrete Substrate
b
Dolly skirts are available for different dolly diameters and for thin substrates - see Section 11.3 “Dolly Skirts” on
page en-11 for details.
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