MTS Landmark TWX - Manual (Page 111)

• Clamping a grip may result in a force spike higher than expected.
• Your test limits may not have been set high enough.
• The specimen may break, resulting in the end of the test.
Rather than cover all possibilities, this section addresses the first case only. Adapt this procedure as
necessary to recover from other cases.
1. Evaluate if the specimen has been damaged.
a) Check meter history to see if acceptable force limits for the specimen have been exceeded.
b) If they have, switch back to Displacement control, safely remove the specimen from the lower grip,
and start over with a new specimen.
c) If the specimen was not damaged, proceed to the next step.
2. Disable the Force Lower Limit.
a) Disable the Force lower limit so that you are able to reposition the grip and reset the interlock.
b) Select Station Manager > Display > Station Setup > Channels > Ch1 (or other depending on
your configuration) > Force.
c) Click the Channel Input Signals button to display the Inputs: Axial Force window.
d) Set Lower Limit: Lower Action to Disabled.
3. Reset the Interlock.
MTS Landmark Test System Operation | 111
Running the Example Tension Test