MTS Landmark Floor Standing - Manual (Page 68)

Warning:
The crosshead is very heavy.
A dropping crosshead can crush hands, damage grips, and smash specimens.
Be careful when working in a crush zone. To reduce the hazards in this procedure, observe
the following:
Set and enable displacement interlocks to limit the actuator’s movement.
Ensure that the crosshead is locked.
Ensure that the columns are clean and dry.
Keep your hands out of the crush zone except when performing the steps needed to complete
this procedure.
5. Turn the Rate control fully clockwise for the slowest clamp speed.
6. Fully install the dummy specimen in the lower grip.
7. Cycle the lower grip control between the clamp and unclamp positions to clamp and unclamp the specimen.
a) Watch the speed at which the lower grip clamps and unclamps the specimen.
b) Adjust the Rate control counterclockwise for the desired speed.
Adjust the Grip Clamp Force
The pressure control adjusts the hydraulic pressure applied to the grips. The rate control adjusts the grips’
clamping speed. They must be adjusted before the grips can be used.
The amount of hydraulic pressure applied depends on the type of grips you are using and what you are
gripping. Use your grip manual to determine the correct hydraulic pressure before adjusting the force.
Experiment with a dummy specimen to find the best setting.
Note:
The pressure control can adjust the grip pressure up to the maximum output pressure setting (which
is initially set by MTS Systems Corporation).
1. Ensure that both the upper grip control and lower grip control are in the unclamp position.
2. Turn on the electrical power at the test controller.
3. Turn on low or high hydraulic pressure.
4. If needed, move the crosshead or actuator so that the dummy specimen can be easily installed in the
lower grip.
68 MTS Landmark™ Floor Standing Load Units Product Information
Operation