3.3.4.2 Hold at Distance Step YYou may hold the crosshead at a Distance target to determine the effects the hold time has on the sample’s load characteristic. The Distance Hold is performed together with an associated tension or compress to distance step. The maximum hold duration of 48 hours at full load capacity can be performed on any Starrett test frame with no cool down period required between hold steps. • Select the test mode- either Tension or Compression • Enter the Distance Limit (target) • Enter the Test Speed • Select the Hold symbol • Select the Distance Hold symbol Enter the Hold Duration value
NOTE The maximum duration for a test is 48 hours.
NOTE The maximum number of data points for a test is 100,000. Adjust the Sampling Rate (Hz) accordingly for your test.
Step Exceptions- use when you want the test to abort if one of these events occur. Break exception- stop if a break event occurs. The Break % is the percentage drop in load from a highest load point. Minimum break is used with a Break exception. This is the load that must be measured before looking for a break event.
The step preceding the Hold step will be the setpoint. Since the load limit is 250N and the hold duration is 15 minutes, the system will hold the sample at a constant load, at this Distance, for 15 minutes.
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.
L3 Test Builder - Hold at Load Holds the crosshead at the target load for a specified time duration
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