MTS AHX800 High Elongation Extensometer - Manual (Page 16)

AHX800 High Elongation Extensometer Product Manual 16
Setting up a Test
Operation
Setting up a Test
To set up a test for a specimen:
1. Select a knife edge.
Choose a knife edge based on the type of specimen which will be tested.
The nature of the specimen material (surface quality, thickness, and so on.)
determines the type of knife edge to use.
The knife edges are secured with screws to the upper and lower arms.
2. Adjust the gage length.
A. Loosen the adjustment rod screw.
B. Place the appropriate wedge (desired gage length) between the knife
edges.
C. Gently press the knife edges together.
D. Tighten the adjustment rod screw.
3. Set the automatic return.
A. Set the arms in the desired position.
B. Loosen the locking screw on the finger holder (which is mounted to the
crosshead).
C. Adjust the crosshead so that the specimen grips are in the proper
position to hold a specimen.
D. Adjust the finger until it touches the upper arm.
E. Tighten the locking screw.
Knife Edges