Bruker NMR iProbe HR-Liquids, User Manual, Page: 42 / 56

Operation
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Figure 7.25: TopShim window to select the corresponding laboratory frame mas shim gradients Z’, Z2’,
Z3’, and Z4’.
• Continue to optimize the Z1’ – Z4’ shims by looking at the lock signal and also at the line
shape.
• Once the iProbe has successfully passed the initial shimming, this shim file can be used
as a base for all other samples. In most cases only the Z’ and Z2’ will then need an
adjustment.