MTS 316 Load Frame - Manual (Page 31)

Direct Shear Configuration
Series 316 Load Frame Product Information Operation 31
Direct Shear Specimen Insertion into the Test Space
Note It is assume that system is in a safe operating condition.
1. Attach the crane to lifting eyes on the upper direct shear box with a lifting
strap.
2. Open the front door of the load frame. Place the nylon spacer on top of the
triaxial cell vessel-mounting table.
3. Using the crane place the direct shear box assembly on the nylon spacer of
the loading plate. Disconnect the crane from the direct shear boxes.
4. Push the direct shear box assembly into the test space.
5. Attach the shear box assembly to the direct shear system with 16 bolts and
torque each bolt to 7.8 N-m (69 in-lbs), alternating between top and bottom
shear box assembly.
6. Remove the front handles.
7. Remove the two bolts from the spherical seat assembly that were used to lift
the upper specimen box.
8. Attach all transducer ID and system cables.
9. Adjust the six displacement transducers into positions that are close to the
electrical null of the transducer output.
10. Remove any remaining electrical offsets with the controller.
11. Close the front door of the load frame.
12. Change the control mode so that the direct shear actuator is in stroke control
and the axial actuator is in load control.
13. Remove any servo error in the system and turn the system axial and direct
shear HSM on.
14. Proceed with testing.
Note Opening the door will generate a program interlock but not turn off the
HSM.