Instron 4400 Series User Manual

A 250-mm chart record is desired for the expected test
duration of
1
/
2
-minute (time expected to reach ultimate
extension). Therefore, the chart time axis should travel
500 mm in 1 minute, and a chart speed of 500 mm/min
is required. Then:
M =
500
mm
⁄
min
250
min
⁄
min
= 2
Each millimeter of chart, along the time-drive axis, will
indicate:
1
M
=
1
2
= Crosshead Displacement (mm)
To determine the percentage of total strain directly from
the chart:
% Strain =
Chart displacement x 100
M x Gauge length
Appendix A
Test Planning
Chart Magnification
A-15

Instron 4400 Series Specifications

General

Brand	Instron
Model	4400 Series
Category	Test Equipment
Language	English