Tektronix TDS3000 Operating Safely with Battery Power

Operating Information
2–4 TDS3000 Series Service Manual
WARNING. To avoid electric shock, always connect the rear-panel ground
terminal to earth ground when operating the instrument from battery power.
For safe operation, the oscilloscope chassis must remain at earth ground potential
even when operating from battery power. 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 VRMS, >42 Vpk).
Protection against this condition is provided when you attach the Tektronix-sup-
plied 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.
When you start to use the battery pack, an on-screen message reminds you to
connect the grounding wire between the ground terminal on the rear panel and
earth ground.
Operating Safely with
Battery Power