MTS Landmark Floor Standing - Manual (Page 62)

2. Set the crosshead position.
The crosshead position depends on the length of the specimen being tested, the starting position of the
actuator, and the size of the fixtures or grips being used.
3. Install the specimen.
Specimen installation varies according to the type of grip being used. For installation instructions, see the
appropriate grip manual. MTS manufactures a variety of grips:
• The Series 641 Hydraulic Wedge Grips (hydraulically controlled) are specifically designed for static or
fatigue testing applications. They are available with a self-aligning feature.
• The Series 643.6X Tension/Compression Grips (mechanical) are used for testing threaded-end and
button-end specimens in tension, compression, or tension/compression.
• The Series 646 Hydraulic Collet Grips (hydraulically controlled) are designed to perform in a wide
variety of testing applications (for example, high and low cycle fatigue, tension, and compression).
• The Series 647 Hydraulic Wedge Grips (hydraulically controlled) are specifically designed for static or
fatigue testing applications. There are a variety of configurations of this grip.
• The Advantage Grips (mechanical) are specifically designed for static or fatigue testing applications.
The Advantage Mechanical Wedge grip is the mechanical version of the Series 647 Hydraulic Wedge
Grips. Advantage Grips also come in Screw Action and Pneumatic versions.
• Bionix grips and other specialty grips (mechanical) are designed to grip specific types of material such
as string, tread, tendons, and so forth.
Each type of grip requires the specimen or specimen fixture to fit properly into the grip. You should always
review specimen installation procedures found in any grip Product Information manual.
Caution:
Incorrectly installed specimens can be a hazard during testing.
An insufficiently gripped specimen can cause specimen damage, equipment damage, and
the possibility of specimen fragmentation.
Before testing, ensure both grips are clamped and the specimen is secure.
4. Set up the load frame for testing.
a) Set the actuator velocity limiting switch to the hare (full flow).
b) Disable the handset and set up the controller for system operation.
5. Reset the controller Gate Interlock.
6. Apply load unit station high hydraulic pressure.
62 MTS Landmark™ Floor Standing Load Units Product Information
Operation