Run the test at 5 mm/min out to a m

Run the test at 5 mm/min out to a minimum of 0.5 %
strain before removing the extensometers, simultaneously recording
the strain readings from the extensometers at the same
applied force. The precision of the value of Poisson’s Ratio
will depend on the number of data points of axial and
transverse strain taken. It is recommended that the data
collection rate for the test be a minimum of 20 points per
second (but preferably higher). This is particularly important
for materials having a non linear stress to strain curve.