MTS Series 609 Alignment Fixture - Manual (Page 67)

Check the Alignment
Series 609 Alignment Fixture Product Information Alignment Procedure 67
Find Each Level’s Maximum Bending Strain and Direction
3. Calculate each gage level’s maximum bending strain and, if necessary, its
strain direction. If all strains fall within specifications, go to Step 1 of the
next section. If not, go to Step 4.
4. Clamp and unclamp both ends of the specimen, one end at a time.
Maintain a zero force on the actuator so that the grips do not move when you
unclamp the specimen. Repeat this step several times.
5. Calculate each gage level’s maximum bending strain and, if necessary, its
strain direction.
• If all strains fall within specifications, go to “Checking the Alignment.”
• If not, return to Step 3. Any “S” bend still remaining will affect your
ability to get equal readings on all gages.
Check the Alignment
In this procedure, you apply the force specified in the test procedure. You then
see if each level’s maximum bending strain stays within specifications.
1. Refer to your ASTM Standard Test Method (or other appropriate standard)
for the amount of force to apply.
Record Settings
Record Settings
Record Settings
Top View
Find maximum bending
strain direction—all
levels
Strain Gage