10. Procedure
10.1 With the probe apparatus installed, calibrate the test
equipment following the manufacturer's instructions,
10.2 Select an equipment load range so that specimen
puncture occurs within 20 to 80 % of the same.
CI.AW
I'KHBK ClfMTKKi:))
ABovr; CLAtii'
t'KOBK
SUPPORT LEGS
( b 2 ) DIAM.I
• 4 (1C2) i|
DIAM. / U 3
NoTF- 1—Measurements are in inches (millimetres).
FIG. 2 Clamp
10.3 Using the template and specimen cutter, prepare a
minimum of five specimens from each sample.
10.4 Measure the caliper (average of three readings) in the
center of each specimen and record the average,
10.5 Set universal tester crosshead speed at 10 in./min (250
mm/min) and chart recorder speed at 10 in./min (250 mm/min).
If using an integrator instead of a data acquisition system, set
the counters to zero,
10.6 Clamp the specimen in the holder. Lower the probe as
close as possible to the specimen without actually touching.
10.7 Set the appropriate stops and returns on the universal
tester. Reset data collection devices if applicable.
10.8 Activate the universal tester. Stop the crosshead when
the puncture probe pas-ses conapletely through the film. Where
holes occur other than at the probe point, the specimen test
results should be discarded. See Fig. 3.
10.9 Record specimen identification, peak force at break,
maximum force, energy (work) to break, and probe penetration
distance at break, from mechanical testing software output.