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4.0 L1 TEST TEMPLATES The L1 test templates are designed to help anyone create common test methods for basic force measurement. Using templates, users with very little knowledge of force measurement can create a test in seconds. Tests options are selected from pull-down menus and only relative options to the test method are available for selection. 4.1 COMMON OPTIONS The L1 test templates use common options, methods and features to help users with a very basic understanding of force measurement, to be able to create and perform a force test. These common options are described below. 4.1.1 NAMING YOUR TEST Every test method created requires a unique test name. Your L1 test method may have up to 24 characters. The name may be created using alpha- and numeric characters.
4.1.3 USING EXCEPTIONS (+STOP IF) Exceptions may be optionally applied to your L1 test method. Exceptions are events, that if they occur, cause the test method to stop. EXAMPLE 1 You want to perform a Distance Limit test in order to determine whether a load is achieved prior to the distance limit. During the test, the measured load is exceeding the expected load for the specified distance. In a compression test method, this could mean that something has happened and you are applying too high a load, which could cause damage to the sample under test or the apparatus used in the test. The test stops before the distance setpoint is achieved. EXAMPLE 2 You want to determine the maximum load and distance at maximum load after the sample breaks. The sample has slipped out of the test fixture, therefore, the crosshead is continually moving upwards, but there is no change in load. The test stops since no break load can be detected.
Shown: New Test Name dialog
4.1.2 TEST TYPES Your L1 test method may be either a Tension or Compression Test Type. When a cyclic test is created, the direction on which you want the crosshead to move first is defined by the Test Type selected. If you choose Tension as the Test Type, the first cycle will start with the crosshead moving upwards in the tensile direction. If you choose Compression as the Test Type, the first cycle will start with the crosshead moving downwards in the compression direction. NOTE The Test Type may be Tension or Compression.
The Min Break setting is when you first start looking for a percentage drop in load. It is a precondition- get to 5 lbf first, then starting looking for a 25% drop in load. That indicates a break.
The Break setting is a percentage drop in the measured load after the Min Break was achieved. The software looks for a percentage decrease in the measured load from a maximum value.
Should the crosshead travel to the Distance Limit before it achieved 10 lbf, the test will abort.
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PKG08807 - UML1 23
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