MTS Landmark Floor Standing - Manual (Page 61)

Note:
When changing hydraulic grips, make sure you cap or plug the hydraulic hoses when removed to
prevent oil spillage. Oil spillage can create an environmental concern and slippery surface that can
cause personal injury. Promptly clean up any oil that might have spilled when hoses were removed.
You must also have the controller set up to control the actuator movement, and you must have a test program
defined.
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.
Install the Specimen
1. Prepare the components for specimen installation.
a) Ensure that the crosshead is locked.
b) Turn on system electrical power.
c) Apply HPU system high hydraulic pressure. Apply load unit station low hydraulic pressure.
d) If the system has a Series 494 based controller, enable the Gate Interlock.
e) Set the actuator velocity limiting switch to the tortoise (restricted flow).
f) Enable the handset and use the thumb wheel to move the actuator to its start position (usually
mid-displacement). The starting position of the actuator depends on the type of fixtures, grips, and the
test being set up.
Caution:
For load units with hydraulic lifts and locks, the crosshead can slowly drift down the columns
if the locks are turned off and when hydraulic pressure is turned off.
The crosshead can damage any test fixtures, grips, and specimen in its path.
Unlock the crosshead only to reposition it. Always lock the crosshead after you have
repositioned it, and never leave the crosshead unlocked.
MTS Landmark™ Floor Standing Load Units Product Information 61
Operation