Instron 2716 Series, Operating Instructions Manual

Page: 26 / 36

Chapter: Operation
26 M10-14402-EN
The force you use to turn the control nut handle determines the initial gripping pressure
on the specimen. The tensile load on the specimen determines the gripping force during
the test.
Caution
Do not exceed the maximum load rating of any load string component. Exceeding
the maximum load rating of a component will damage it.
Caution
Do not load the grips with compressive forces. Compressive loading removes the
gripping force from the specimen.
Checklist
Check for the following conditions before you install a specimen:
•
The grips are aligned.
•
The size and type of jaw faces are appropriate for the test specimen.
•
There enough space between the upper and lower grip to install the specimen.
•
The load frame extension limits are set to prevent the grips from colliding.
Procedure
If your control system has a SPECIMEN or LOAD PROTECT function, use it when you install
a specimen. Refer to the control system manual for the operational details.
1. Separate the jaw faces by rotating the grip control nut on both grips.
Warning
Crush Hazard - Keep your fingers clear of the area between the jaw faces.
Caution
Make sure the specimen is contacting the entire length of the jaw faces. Partial
specimen engagement may damage the grips.
1. Position the specimen in the grips so it engages the entire length of the jaw faces.