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15
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2. Directions for use
2.1
INSTALLATION
2.1.1
Safety regulations (in accordance with IEC 348)
Before connecting the instrument to the mains (line), visually check the cabinet, controls and connectors etc.
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to ascertain whether any damage has occurred in transit. If any defects are apparent, do not connect the
instrument to the mains (line).
The instrument must be disconnected from all voltage sources and any high voltage points discharged before
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any maintenance or repair work is carried out. If adjustments or maintenance of the operating instrument
with covers removed is inevitable, it must be carried out only by a skilled person who is aware of the hazards
involved. In normal operation the double-insulated power supply obviates the need of a safety ground.
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Warning:
It must be borne in mind that in all measurements the frame ground of the oscilloscope is
raised to the same potential as that of the measuring ground probe connection. Neither the
probe's ground lead nor the frame ground shall be connected to live potentials.
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2.1.2
Local mains (line) connection and fuse protection
Before connecting the instrument to the mains (line) ensure that it is set to the local mains (line) voltage. On
delivery the instrument is set to 220 V. If the instrument is to be used with 110 V, 127 V or 240 V supply,
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the appropriate voltage should be selected by turning the adaptor on the rear panel to indicate the voltage
required (see Fig.2.1).
The instrument is protected from overloads by a thermal fuse fitted between the mains (line) transformer
windings. It can be replaced after having removed the instrument rear panel (see section 3.2).
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Fig. 2.1. Rear view of the oscilloscope showing the voltage adapter set to 220 V.
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