Automatic Release Operation - Instron 4400 Series Operator's Manual

This is useful with or without Pretension operation. If
Pretension is disabled, the test will start when the foot
pedal is pressed the second time to close the lower grip.
With Pretension enabled, the test will start when the Pre-
tension Level is reached and the lower grip closes (auto-
matically), provided the load stays within the Pretension
Hysteresis and Excess Tension ranges.
To use Automatic Start:
(a) Press [S1] [7] [3]. Read the current state of Automat-
ic Start from the Main Panel Display.
(b) The Main Panel Display will show:
"S7 3" if Automatic Start is enabled.
"S7–3" if Automatic Start is disabled.
(c) Use the [+/–] key to toggle between the enabled and
disabled state.

Automatic Release Operation

When both the Grip Control function and Automatic Re-
lease are enabled, both grips will open when a test ends
(by whatever means). This avoids the need to press the
OPEN pedal to start the next manual or pretension se-
quence.
To use Automatic Release:
(a) Press [S1] [7] [4]. Read the current state of Automat-
ic Release from the Main Panel Display.
(b) The Main Panel Display will show:
"S7 4" if Automatic Release is enabled.
"S7–4" if Automatic Release is disabled.
Air Kit Option
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