Here is an important tip if you are setting up an automation run using Bruker’s ICON-NMR software. Before the run, lock and shim on your first sample. Once you have a very good shim, write your shim settings (‘wsh’) to a new shimset called “automation.” If you specify the “automation” shimset in the gradshim menu as the one to be used by ICON, it will use this shimset as a starting point for automated shimming before each sample rather than a default shim.