The test for the Data Rule type of custom object requires that you specify the following values in addition to the Asset Serial Number:
Data Item Name -- type the name of the data item to use for the test.
Data Item Type -- select the type of the data item specified in the first parameter from the list (Analog, Digital, or String). The default selection is Analog.
Data Item Value -- type a value to use for the test.
If the custom object has parameters (variables), enter values for those parameters to use in the test.