Instron AVE2, Operator'S Manual

Page: 55 / 88

55 Product Support: www.instron.com
Chapter 5
Set up hardware
•
Extensometer lenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
•
Set up the load string . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
•
Set up for AverEdge32™ configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Warning
Set appropriate mechanical limits on the load frame before starting any tests. If you
are using an 8800 or ElectroPuls system, you set these limits via the Console software.
If the extensometer loses track of the marks on the specimen during a test,
unexpected crosshead or actuator movement can occur. It is very important that
you limit any such movement.
The AVE2 and SVE2 can be used on a wide range of testing machines. Newer machines,
in combination with Bluehill
®
or WaveMatrix
TM
software, are designed to handle the loss
of strain signals due to loss of marks in a controlled manner. If you are not using
Bluehill
®
or WaveMatrix
TM
software or are using an older testing machine, these
systems may not be present. It is therefore imperative that you set these limits.
Extensometer lenses
Most users can do all of their testing using the standard 16mm focal length lens.
Depending on your testing machine, lenses of different focal lengths are available for
use with the video extensometer. The field of view achieved by a particular lens depends
upon:
•
focal length of the lens
•
distance between the lens and the specimen
On any one testing machine, the distance between the lens and the specimen is fixed,
but that distance is different for different testing machines.