MTS Fracture Template - Manual (Page 34)

Caution :
Lower Setpoint/Span Times in the Series 793 Station Manager application can cause specimen
or equipment damage.
Decreasing the Setpoint/Span Times default of 2.0 seconds after the test run completes can
be too fast for other actuator commands, and can cause specimen or equipment damage.
After the fracture test run has completed, set the Setpoint/Span Times in the Station Manager
application back to their previous values before you use it to command the actuator for other
purposes (for example, for specimen removal or installation).
Turn On Hydraulic Power
Use the control panel to apply hydraulic power.
1. If the Interlock indicator is on, click Reset to release system interlocks.
If the interlock remains on, use the message logs to identify and correct the cause of the interlock.
Warning :
Applying hydraulic power can result in sudden actuator motion.
A moving actuator can injure anyone in its path.
Always clear the actuator area before applying hydraulic power.
2. Click Low Power.
This action sets the hydraulic power unit to high pressure and the hydraulic service manifold to low
pressure.
3. Click High Power.
This action sets the hydraulic service manifold to high pressure.
Perform Crack Size Check
This activity applies a load to the specimen and verifies the crack size and the modulus for tests that use
a Crack Opening Displacement (COD) clip gage to measure the crack opening.
1. Click CSC on the main menu.
2. Optionally, click Change Parameters. These parameters determine how to measure crack size, and
how to calculate crack size and modulus.
34 | MTS TestSuite
Fatigue Crack Growth (FCG) Template