MTS Model 685.53 Grip Control Module - Manual (Page 22)

Model 685.53 Grip Control Module 22
Gripping Specimens
Operation
Do not clamp the grips without a specimen installed.
Some grips may be damaged by closing the grip without a specimen
inserted or with a specimen only partially inserted.
See the appropriate grip product information manual for detailed specimen
mounting instructions.
4. Grip the specimen as follows:
Because of the large variety of load frame, grip, and controller equipment in
use, it is impossible to give explicit instructions for this process.
Pliers or tong-like tools such as those used for installing or removing
cartridge-type electrical fuses are often used for holding small specimens in
proper position within the grips to lessen the possibility of having fingers
pinched or crushed during the gripping process.
Gripping a specimen typically involves manually holding the specimen in
place within the upper grip and then, with the specimen correctly in place,
applying hydraulic gripping pressure to the upper grip. And finally, it
involves moving the actuator as necessary to correctly position the lower
end of the specimen within the lower grip. Hydraulic gripping pressure is
then applied to the lower grip.
A. Perform any operations necessary to correctly position one end of the
specimen within the upper grip.
B. When the specimen is properly positioned within the upper grip, rotate
the upper grip control clockwise to the grip position.
C. Perform any operations necessary to correctly position one end of the
specimen within the lower grip.
D. When the specimen is properly positioned within the lower grip, rotate
the lower grip control clockwise to the grip position.
Note While applying test loads to specimens mounted in the grips, leave the
grip controls in the grip position.
CAUTION