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2. Directions for use
2.1.
2.1.1.
2.1.2.
2.1.3.
INSTALLATION
Safety regulations (in accordance with IEC 348 or VDE 0411)
Before connecting the instrument to the mains, visually check the cabinet, controls and connectors etc., to
ascertain whether any damage has occurred in transit. If there is a doubt about the efficiency of the
protection, check this. If the protection is no longer guaranteed, disconnect the instrument from the mains
and make it inoperative.
Always disconnect the instrument from the mains before removing any protective covers.
Any maintenance and service work necessary with the instrument switched on, should be performed by a
qualified technician.
The mains connector must be plugged only into an earthed mains socket.
Do not make this safety protection ineffective, for example, by the use of an unearthed extension cable.
Position
The instrument may be used horizontally or in the sloping position by hinging out the tilting bracket.
Ensure that the ventilation holes in top and bottom plates are free from obstructions.
Do not position the instrument on any surface which produces or radiates heat.
Connection to the mains
The instrument must be connected only to an a.c. supply. On delivery the instrument is set to 230 V + 15 %.
If the instrument is to be used with a 115 V + 15 % supply, proceed as follows:
~— unplug the mains connector.
—
loosen the two screws at the rear and remove the bottom plate.
—
change the connections on the transformer in accordance with the diagram (see Fig. 2).
—
replace the bottom plate and remove the top plate.
—
change the mains-voltage plate on the rear in accordance with the mains voltage selected.
—
replace the instrument top cover.
Fig. 2. Connection diagram for the different mains voltages
Earthing
The instrument must be earthed in conformity with the local safety regulations. The supplied mains cable
contains a protective conductor which is connected to the earth contacts of the plug. The instrument must be
connected to an earthed mains socket. The protective earthing of the instrument is only guaranteed when
connected as described above.
The circuit earth potential of the generator (that of the external contacts of all BNC connectors) is connected
to the cabinet by means of a parallel-connected capacitor and resistor. Correct HF-earthing of the circuit is
then obtained.
The outer contacts of the BNC sockets may not be used to connect a protective conductor.
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