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4 MOUNTING A SPECIMEN
Specimens are placed on the table and held flat against the table by the action
of magnetism (for ferrous specimens) or vacuum (optional feature for
non-ferrous specimens). The ideal specimen size is 200 mm x 100 mm (8" x
4").
4.1 Ferrous (magnetic) specimens
1. When working with coatings which require a lot of force to scratch, it may
be necessary to use the stop blocks on the end and side of the table to
prevent the specimen from slipping.
Adjust the height of the stop blocks until they are raised above the level of
the table (Figure 7); take care not to raise the stop blocks too much to
prevent contact with the scratching tool.
Figure 7. Setting the stop blocks to hold the specimen
Op_1535_01 A5.fm Page 13 Wednesday, August 8, 2007 3:59 PM
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