MTS Landmark System - Manual (Page 77)

a) Unlock the crosshead clamps, and then move the crosshead up or down so that there is about 25
mm (1 inch) clearance between the upper grip and the specimen.
b) Once properly positioned, reclamp with the crosshead lock control.
Move the Specimen into the Upper Grip Using Displacement
Control
Displacement control is used to move the specimen into the upper grip. However, care must be exercised
to ensure that the no force is imparted on the specimen during the process as this could affect test results.
Move the specimen up and into the upper grip.
a) Make sure the grip is open and ready to accept the specimen.
b) Use the slider controls to move the specimen up and into the upper grip.
Important: Your station setup will determine whether you have to move in the positive or
negative direction.
Switch to Force Control
Switching to force control helps ensure that you do not impart excessive force on the specimen during
installation. Once in force control, the controller will follow your positioning commands while working to
maintain the force that you specify — in this case 0.00 kN.
Switch to force control.
a) In the Station Manager main window, click the Manual Command icon.
b) Set Control Mode to Force.
MTS Landmark Test System Operation | 77
Running the Example HCF Test