3–3
No voltage selection is required, since the instrument automatically
adapts to the line voltage present.
Fuses The oscilloscope’s power supply is protected against short-circuit and
overload by means of two “T”-rated fuses of type according to scope
model:
Ø 6.3 A/250 V AC 9344C, 9350C, 9354C, 9370C, 9374C, 9384C Series
Ø 5 A/250 V AC 9304C, 9310C, 9314C Series.
The fuses are located above the mains plug. Disconnect the power
cord before inspecting or replacing a fuse. Open the fuse box by
inserting a small screwdriver under the plastic cover and prying it open.
For continued fire protection at all line voltages, replace only with fuses
of the specified type and rating (see above).
Ground The oscilloscope has been designed to operate from a single-phase
power source, with one of the current-carrying conductors (neutral
conductor) at ground (earth) potential. Maintain the ground line to
avoid an electric shock. None of the current-carrying conductors
may exceed 250 V rms with respect to ground potential. The
oscilloscope is provided with a three-wire electrical cord containing a
three-terminal polarized plug for mains voltage and safety ground
connection. The plug's ground terminal is connected directly to the
frame of the unit. For adequate protection against electrical hazard,
this plug must be inserted into a mating outlet containing a safety
ground contact.
Cleaning and Maintenance Maintenance and repairs should be carried out exclusively by a LeCroy
technician (see Chapter 1). Cleaning should be limited to the exterior of
the instrument only, using a damp, soft cloth. Do not use chemicals or
abrasive elements. Under no circumstances should moisture be allowed
to penetrate the oscilloscope. To avoid electric shocks, disconnect the
instrument from the power supply before cleaning.
CAUTION Risk of electrical shock: No user-serviceable parts inside. Leave
repair to qualified personnel.
Power On Connect the oscilloscope to the power outlet and switch it on by pressing
the power switch located on the rear panel. After the instrument is
switched on, auto-calibration is performed and a test of the
oscilloscope's ADCs and memories is carried out. The full testing
procedure takes approximately 10 seconds, after which time a display
will appear on the screen.
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