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Operating Information
TDS3000 Series Service Manual
2–3
Connecting Power
To connect a power cord, do these steps:
1. Open the strain relief and slip it over the power cord.
2. Snap the strain relief into its hole in the rear panel of the oscilloscope.
3. Connect the power cord to the power input connector.
You can operate the oscilloscope from a grounded mains supply with line voltage
between 90 V
AC
and 250 V
AC
and frequency between 47 Hz and 440 Hz. The
oscilloscope is grounded through the power cord. The line fuse is internal and is
not user replaceable.
You can operate the oscilloscope continuously for approximately two hours from
the rechargeable battery pack. A triangle icon in the display (
) shows when the
battery is in use, a power-plug icon (
) shows when line power is connected,
and a gauge icon (
) shows the charge level in the battery. The oscilloscope
turns off automatically when the battery runs low; a low-battery message appears
in the display about ten minutes before the automatic shutdown.
NiCad batteries appear to lose capacity if not allowed to occasionally discharge
completely. Every few months, run your oscilloscope until it shuts down and
then recharge the battery completely to keep your battery pack at peak perfor-
mance.
Refer to the General Safety Summary for information about proper nickel-cad-
mium battery disposal.
Using Battery Power