Elcometer 508 Guia Del Usuario página 11

10 SPARES & ACCESSORIES (continued)
10.2 DOLLIES
The Elcometer 508 is supplied with five standard flat dollies with an
outside diameter of 19.4mm (0.76"). Additional dollies are available to
purchase separately together with dollies for measuring on curved
surface - see Section 10.3.
Description
Standard Flat Dolly, 1 off
10.3 DOLLIES FOR CURVED SURFACES
Using a flat dolly on a curved surface can produce misleading results.
The gap between the flat and curved surfaces will not be filled by the
adhesive, resulting in one or more of the following effects:
The dolly may peel or twist off instead of being pushed off.
Ÿ
The surface area to which pressure is applied, will be modified.
Ÿ
This will lead to results from different curvatures not being
comparable.
The amount of adhesive may not be sufficient to withstand the
Ÿ
exerted force, resulting in the adhesive breaking before the
coating separates from the substrate.
These difficulties are overcome by using curved dollies on diameters of
less than approximately 2m (6' 7"). An extensive range of curved
dollies is available.
Curved and flat dollies are all used in the same way, matching the
marks on the dollies with the longitudinal axis on the curved surface.
CONVEX DOLLIES FOR CONCAVE SURFACES
Part Number
T999122741
T999122742
T999122743
T999122744
T999122745
www.elcometer.com
Dolly
Radius (mm)
940
470
313
235
188
Part Number
T9999646-
Internal Diameter
Min (mm)
1880
940
626
470
376
R
Max (mm)
FLAT
1880
940
626
470
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