Instron 2620-600 Series, Справочное руководство

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Chapter: Operation
2-4 M26-16655-EN
The long extenders (37.5 mm or 40 mm) are
installed in a similar manner, except that four
short screws are used. Attach the knife edge
to the extender before attaching the extender
to the beam. Use the ball end of the hexagon
wrench to tighten the two screws through the
lower lip of the extender
Inspect the extensometer for free operation
and ensure that the knife edges are aligned
parallel with each other and are not dulled or
nicked,
Warning
Hazard - Do not operate the testing
system in Strain Control with the
extensometer disconnected.
Loss of feedback signals from the
extensometer will result in loss of closed-
loop control, forcing the actuator piston to
accelerate into its mechanical stops
endangering personnel and equipment.