8.9.1 Load Sign Assignment The “Export with minus sign” function lets you specify how to designate a compression load using a negative sign. Tensile loads will have a positive sign (no sign actually shown), while compression loads will display a negative sign. Or, you may choose to reverse the sign so that tensile loads have a negative sign to distinguish them from a compression load (no sign). When the selection = Compression, compression results will be displayed with a negative sign. Tensile results will display without a sign. When the selection = Tension, tensile results will be displayed with a negative sign. Compressive results will display without a sign.
8.9.2 Grip Load The Grip Load is a value that you enter to protect your test fixture (grip) from damage due to overloading or exceeding the load capacity of the test fixture. All test fixtures have a load capacity. This load capacity is the maximum load that the test fixture is rated to. Loads exceeding this capacity can permanent damage the test fixture. Often, the maximum capacity of the test fixture is below the maximum load capacity of the load cell sensor, therefore, the maximum load for a test setup should be the lowest rated capacity of the test fixture, load cell or test frame. The Grip Load setting allows you to enter a load capacity limit based on the testing fixture used. For example, you may have a 1000N load cell, but you are using a test fixture with a maximum testing capacity of 50N. In order to protect the test fixture, you can set the Grip Load to 50N. When 50N is reached, the test run will terminate and protect the test fixture. WARNING Excessive crosshead speed may make it impossible to stop in sufficient time to prevent an overload. Do not use high speeds, particularly in compression directions. NOTE If Grip Load is set, a test run will abort if the measured load exceeds the Grip Load value you have entered. NOTE The Grip Load value is sign dependent. If your compression sign is negative, you must enter the Grip Load value as a negative value if you intend to protect your test fixture with a load capacity limit in the compressive direction.
L3 LOAD Setting Shows a compression value entered as a negative value
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