MTS Series LX Laser Extensometer - Manual (Page 42)

LX Laser Extensometer
Using the Instrument
Operation 42
5. Measurement Type - Sets the type of Measurement performed. The laser
extensometer measures the distance between the front edge of each target.
The target edges are labeled as follows:
T
1
= front edge of target 1
T
2
= front edge of target 2
T
3
= front edge of target 3
T
4
= front edge of target 4
The choices for measurement type are:
T
2
- T
I
distance between front edges of first two targets (T
1
and T
2
)
MULTISEGMENT = simultaneous measurement of the 3 intervening
segments between front edges of targets T
l
--T
2
--T
3
--T
4
respectively.
T
2
- T
1
= distance between front edges of first and second targets (T
1
and
T
2
).
T
3
- T
2
= distance between front edges of second and third targets (T
2
and
T
3
).
T
4
- T
3
= distance between front edges of third and fourth targets (T
3
and T
4
).
For the T
2
- T
1
measurement type setting, only two targets are required.
These targets are positioned such that the front edges are coincident with the
gauge length.
For the Multisegment measurement type setting all four targets are
required. They are arranged sequentially within the gage length and define
the three segments over which the measurements are taken. Segment 1 is
intervening distance between front edges of first two targets (T
2
-T
1
).
Similarly, Segment 2 is the distance between front edges of the second and
third targets (T
3
-T
2
) and Segment 3 is the distance between front edges of
the third and fourth targets (T
4
- T
3
). All three segments are measured
simultaneously. However, they are only available simultaneously over the
serial input/output port. Only one segment at a time can be monitored at the
Analog Output and on the LCD display. The segment being monitored is
indicated by a 1, 2, or 3 in the lower left corner of the LCD display. A 1
indicates the first segment (T
2
-T
1
.), a 2 indicates the second segment (T
3
-
T
2
), and a 3 indicates the third segment (T
4
-T
3
). Use the Scroll button to
select the segment you want to monitor; a segment displayed on the LCD
display is also applied to the Analog Output. The Zero button zeroes all
three segments simultaneously.