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10
2.2.
MOUNTING
The instrument may be used in any desired position. With the handle fold down, the instrument may be
used in sloping position; for this purpose press the buttons
of the handle (Fig. 2). Do not position the
instrument on any surface which produces or radiates heat, or in direct sunlight.
2.3.
EARTHING
Before switching on, the instrument must be earthed in conformity with the local safety regulations.
The mains cable fixed to the instrument includes a protective conductor, which is connected to the
earth contacts of the plug. Thus, when connected to an earthed mains socket, the cabinet of the instru-
ment is consequently connected to the protective earth.
WARNING:
Connect the mains cable plug only to a socket with protective earth contacts. This pro-
tection must not
be
made ineffective, e. g. by using an extension cable without earth
protection!
The circuit earth potential applied to the external contacts of BNC sockets is connected to the cabinet
by means of a parallel-connected capacitor and resistor. So correct
H
F-earthing of the circuit is ob-
tained. The external contacts of the BNC sockets must not be used to connect a protective conductor.
2.4.
DISMANTLING THE INSTRUMENT
Unplug the mains connector
Fold up the handle to the top. For this push the buttons of the handle
Loosen the central screw at the rear
Remove the lead-through of the mains cable from the cabinet
Dismantle the cabinet
2.5.
MAINS CONNECTION
The instrument must be connected only to an AC supply. On delivery the instrument is set to 230 V.
Before mains connection, ensure that the local mains voltage ranges within the set mains voltage range
indicated on the plate at the rear of the instrument.
If the instrument is to be used on 115 V supply, proceed as follows:
Unplug the mains connector
Dismantle the instrument, see 2.4.
Resolder links on the mains transformer in accordance with the stick-on connection diagram. See
also below.
f--230V-1
•
•
•
!-
115V-j
··~--··
··~------
Insert the supplied fuse 500 rnA delayed into the fuse holder instead of the one built-in
Change the mains voltage plate at the rear of the instrument in accordance with the mains voltage
selected. This plate for 115 V is inserted into a plastic cover, as the fuse just mentioned.
Close the instrument
Mains connection must
be
made in accordance with the local safety regulations. This implies that the
instrument is connected to mains socket with protective earth contact (see para. 2.3.).
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