MTS Series 647 Hydraulic Wedge Grips - Manual (Page 91)

Warning:
The environmental chamber and the grips can be subjected to extreme temperatures during the
test. Opening the door after a test will vent the hot or cold air from the chamber.
Touching chamber or grip parts before they have been allowed to reach a tolerable handling
temperature or without adequate protective clothing or tools can result in serious freeze or burn
injury.
Do not stand or put unprotected hands in the path of the venting heated air while opening the
door. Open the door only enough to allow the heated air to escape. Note that the thermal mass
of the gripping end and specimen inside the chamber will continue to heat the air escaping from
the chamber.
Allow the specimen to reach a tolerable temperature or use protective clothing or appropriate
tools before attempting to remove it. The length of time required will be dictated by the size of
the grip and specimen, the testing temperature, and the length of time at that temperature.
1.
Warning:
Heavy or fractured specimens can fall from the grips when released.
Injury to personnel or damage to the test equipment can result.
Take adequate precautions to support heavy or fractured specimens.
Turn on system hydraulic pressure and hydraulic grip supply pressure according to applicable system
procedures.
2. Release the upper and lower grips.
3. Remove the specimen. If the specimen is not fractured, it might be necessary to retract the actuator.
Series 647 Hydraulic Wedge Grips Reference Manual 91
Operation