Chapter: Preparation for Testing
24
M20-52630-1-EN
2. Position replacement knife edge with
the bevel side of the knife edge
furthest from the cut-out in the
extensometer arms.
3. Secure with socket head cap screw
ensuring alignment faces of the knife
edge and extensometer touch.
Specimen Centering Stops
Precise alignment of the extensometer is
necessary to ensure the correct
measurement of strain in a specimen and
to enable rapid, precise attachment to the
specimen. To achieve this a pair of optional
stops are supplied to assist with aligning
the extensometer relative to the specimen.
Graduations are marked on the surface of
the stops to allow equal setting.
Figure 4. Knife Edge Replacement
Socket Head Cap Screw
Knife Edge
Bevelled
Edge
Alignment Faces
Extensometer
Arm
