Getting Started
TDS3000 Series User Manual
1–11
Operating Safely with Battery Power
WARNING. To avoid electric shock, connect the rear-panel ground
terminal to earth ground when operating the instrument from battery
power.
For safe operation, the oscilloscope chassis should always remain at
earth ground potential. Without a connection between the chassis and
earth ground, you can receive a shock from exposed metal on the
chassis if you connect an input to a hazardous voltage (>30 V
RMS
,
>42 V
pk
). Protection against this condition is provided when you
attach the Tektronix-supplied grounding wire from the terminal on
the rear panel to earth ground. If you use a different grounding wire,
it must be at least 18 gauge.
If you choose not to attach the grounding wire, you are not protected
against electric shock if you connect the oscilloscope to a hazardous
voltage. You can still use the oscilloscope if you do not connect a
signal greater than 30 V
RMS
(42 V
pk
) to either the probe tip or
common lead. Ensure that all probe common leads are connected to
the same voltage. Also, do not connect a grounded device, such as a
printer or computer, to the oscilloscope.
WARNING. Hazardous voltages may exist in unexpected places due to
faulty circuitry in the device under test.
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