3.3.1.4 Tensile Load Rate Load Rate control is an advanced test method where a limit is defined as “getting to a load setpoint in a specified rate of time”. For example, you may configure a tensile step where you want the crosshead to go to a setpoint of 15 lbf in 5 seconds.
First, specify the tensile load rate step. Next, enter the target load of 15 lbf.
Lastly, since our rate is based on minutes, we convert 5 seconds to minutes or 1/12 minutes. So, to get to 15 lbf in 5 seconds we multiply 15 x 12 = 180 to establish a rate of 180 lbf/minute.
These are the Exceptions for this step. An exception is an event. An exception stops the test. Exceptions are optional, but are recommended. Distance Limit - If the crosshead moves, and the measured distance equals this limit, the crosshead will stop. Break % - If the sample breaks the test will stop. A break is defined as when the load drops by this percentage value after a Minimum Load has been achieved and there is a maximum load measured. Min Break - This is the minimum load that must first be achieved before the system begins to look for a Break % drop in load.
Enter the target Load Limit. This step will conclude when this load is achieved.
Enter the Rate. This is the velocity the crosshead will move at to the Limit.
When Collect Data = Yes, the individual data points for this test step are acquired and saved for exporting. When Collect Data = No, no data points are collected or saved. The step is just a “goto” without any data collected.
L2 Plus Test Builder - Tensile Step Types Moves to a Load target at a specified Rate based on Load/minute
L2 Plus Test Builder - Tensile Step Types
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