MTS Series 311 Load Frame - Manual (Page 79)

Load Unit Addendum Addendum 79
Addendum
This addendum provides information on options not documented in the original
load frame manual.
Actuator velocity limiting switch
This switch/indicator is used to control actuator speed. The switch is spring
loaded left/right with a center neutral position. Momentarily turn the switch right
to the [
] and then return the switch to the center position for high-speed,
normal testing operation. The switch indicator will light, indicating the actuator
rod is capable of high-speed, normal testing operation. Momentarily turn the
switch left to the [
] and then return the switch to the center position for low-
speed, specimen installation and removal. The switch indicator will extinguish,
indicating the actuator rod is in a low speed condition for specimen installation.
Control Panel (Custom)
The Emergency Stop button is standard; the other controls are optional.
Crosshead lifts control
Controls the crosshead lifts to raise and lower the crosshead hydraulically.
Crosshead locks control
Controls the crosshead locks to lock and unlock the crosshead hydraulically.
Actuator velocity limiting
switch
Controls actuator rod speed. There are two positions: one for reduced speed of
the actuator rod for specimen installation and one for normal, high-speed testing
operaton.
Emergency Stop
Removes hydraulic pressure from the load unit and issues an interlock signal to
the controller to stop the test program.
Handset
The handset has an encoder and buttons to help you during specimen installation
and test execution. The handset also has an alphanumeric display and LEDs to
provide feedback.
Specimen Installation
The procedure to install a specimen varies due to the variety of test fixtures,
grips, and the type of specimen being installed. This section should be considered
a guideline. You need to modify this procedure to suit your equipment.
Prerequisite
You must have the necessary grips and/or fixturing installed. You must also have
the controller set up to control the actuator movement, and you must have a test
program defined.