User`s guide

12 Controls and Connectors
370 InfiniiVision Oscilloscopes User’s Guide
13. Ground Terminal Option BAT oscilloscopes: Connect the oscilloscope to earth
ground using this terminal. Maintain oscilloscope ground connection. Do not negate the
protective action of the ground connection to the oscilloscope. If the device under test
has voltages greater than 30 Vrms, the oscilloscope must be grounded through its ground
terminal to prevent electric shock to the user or damage to the oscilloscope.