MTS Criterion Series 40 - Manual (Page 75)

For control instructions, see Position the Crosshead (p. 68).
c) Clamp the specimen.
When the specimen is properly aligned, release the lever to clamp the specimen.
d) Ensure that the specimen has a slight gap (A) between the end of the specimen and the grip so as
not to preload the specimen.
MTS Criterion ™ Series 40 | 75
Running the Example Tension Test