7.2.12 Loads The Load Setting is used to specify options and characteristics concerning load measurement. The following options may be specified: Compression Sign You may 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 with 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). Grip Protection 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. Frame Capacity The L3 software will identify the test frame capacity that it is communicating with. This is a read-only function.
Load Cell The L3 software identifies the load cell sensor model that is connected to the test frame and that is communicating and controlled by the L3 workstation. You may use the drop down list to select a load cell model if you choose to have a specific load cell associated with this system or a particular test setup. Load Cell Limit You may limit the capacity of a connected load cell sensor by specifying the maximum load allowed. Using this limit can help prevent accidental overloads. If you are using a 100N load cell, and you specify the Max load allowed at 75%, the 100N load cell will measure between 0 and 75N. A test run will terminate if this load limit is exceeded. 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. Disable Overloads Pressing the Disable Overloads button disables all overload protection for your system. Disable Overloads is used during a load cell calibration and should be reserved for experience personnel with expertise in load cell calibration. Disabling overload protection requires the user to enter a password. WARNING Do not use Disable Overloads unless you are an experienced technician performing a field load cell calibration.
Limits the load based on the grip capacity. Test run will terminate when this load is reached. 0.00N means there is no load limit assigned.
Select how a negative (-) sign is used to distinguish between tensile and compressive results.
Indicates the con- nected test frame’s load capacity. Read- only.
Loads Setting
Limits the load measurement of the connected load cell sensor. 100% means the load cell sensor can measure to its specified full scale capacity.
Disable Overload Setting Password Protection Required. WARNING Obtain the Overload Password from your Starrett representative.
Select the load cell sensor model used for this system or for a test and on which the Max load allowed is specified.
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