3.3.4 Hold Steps You can perform constant load or constant distance tests using the Hold step. Creep and relaxation are typical applications that use a hold function. 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. Travel Limit exception- stop if the crosshead goes to this distance during the hold period. 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.
3.3.4.1 Hold at Load Step When you want to hold a load, first create your step with a load variable; either a tension or compression load. Next, select the Load Hold step. Then specify the duration for your hold period. The maximum allowable hold duration is 48 hours (depending on test frame used). • Select the test mode- either Tension or Compression • Enter the Load Limit (target) • Enter the Test Speed • Select the Hold symbol
The step preceding the Hold step will be the setpoint. Since the load limit is 250N and the hold duration may be set for up to 172,800 seconds, the system will hold the sample at a constant load for 48 hours (172,800 sec).
• Select the Load Hold symbol • Enter the Hold Duration value
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.
Distance Hold step- go to a distance value and hold for a specified duration.
Load Hold step- go to a load value and hold for a specified duration.
L3 Test Builder - Hold at Load Holds the crosshead at the target load for a specified time duration
L3 Test Builder - Hold Step types
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