Chapter: Function of controls
66 M10-17313-EN
Pneumatic Grips
Table 7 on page 66 lists the pneumatic grips recommended for use with these testing
systems, combined with the optional integrated air kit and footswitch. They utilize the
grip control features of Operator Protection including reduced initial grip pressure, which
reduces the speed and force of closing while setting up a test, thus reducing the risk of
injury.
Always disable the frame before installing or changing pneumatic grips.
When the frame is enabled, the integrated air kit is pressurized. If you attach a grip to
the system in this state, the grip could close.
Other pneumatic grips can be used with the system, including operation with the
integrated air kit and footswitch, but they may not be designed to utilize the full range of
features of Operator Protection. Contact Instron
®
Service for advice.
How Operator Protection works with grips
When in SET UP mode, pneumatic grips close at a reduced initial grip pressure. The
lower the pressure, the lower the force and speed at which the grips close. You should
therefore set this speed to the minimum required to close the grips and grip the
specimen within a reasonable time, but taking into account that even low pressures can
cause injury.
The default value is 15 psi. The following table lists recommended initial grip pressures
for the pneumatic grips listed in Table 7 on page 66:
Table 7. Recommended pneumatic grips
Grip model number Grip capacity
2712-041 1 kN
2712-042 2 kN
2712-045 5 kN
2712-046 10 kN
2712-052 250 N
2712-051 50 N
1
1. These low capacity grips do not include the toggle switch.
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