Run Mode; Service - MTS Systems Landmark 370 Series Product Information

Operation
In conjunction with the controller and specimen installation mode using the handset, the load frame
itself has two operation modes: full flow, and actuator velocity limiting restricted flow. A switch on the
load frame control panel activates a solenoid which controls a hydraulic circuit within the load frame
hydraulic service manifold. In the actuator velocity limiting mode, oil flow to the actuator is directed
through an orifice which limits actuator velocity to 10 mm/second or less. This switch circuit is
integrated with the test area enclosure door switches.
The enclosure has doors on the front and rear of the test area which are locked and confirmed secure
with a keyed latch mechanism. Power must be applied to the door switches to allow entry into the test
area. Power is applied to the door switches when the system is in the actuator velocity limiting mode.
When either of the doors is open, the system will not permit the operator to return the load frame into
full flow mode or put the controller in program run mode. If the solenoid door latch is defeated and the
door is opened during normal operation, the system will detect this and activate the limited actuator
velocity mode and put the controller into program interlock mode.
Specimen Installation and Setup–Interrupt Operation
To interrupt operation:
1. Switch the system to the CLC manual control mode.
2. Activate the handset control.
3. Prior to gaining access to the test area, switch to velocity limiting mode on the load frame
control panel.
Specimen setup or removal can now take place inside the test area enclosure.
Specimen Installation and Setup–Resume Operation
To resume normal test mode:
1. Close the door.
2. Switch to full flow mode.
3. Deselect the handset control.
4. Put the system into the control mode desired for the start of the test.

Run Mode

The system is fully operational when all of the following have been satisfied.
The test area enclosure doors are closed.
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The actuator velocity limiting is in full-flow state.
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The handset and manual control are yielded to controller.
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The system is in high pressure.
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Service

Most normal service requirements can be met utilizing the normal three operating modes as listed
previously. However, there can be circumstances where operation in full flow mode with the test area
enclosure open is required. In these cases, trained service personnel can disconnect the standard
enclosure cable, and temporarily replace it with a service connector. This operation is not considered
76 MTS Landmark™ Tabletop Load Units - Product Information