Mains Voltage Selection Switches - Racal Instruments 9081 Maintenance Manual

CHAPTER
5
MAIN
I £
NAbl^
J
=
POWER
SUPPLY (MAINS)
VOLTAGE
SELECTION
5.1
AC
supply voltage selection
is
by means
of
two
slide
switches with locking
plate
on
the rear panel
.
(1)
Observe
the
voltage range marking shown
in
the
cutaway
portion of
the locking plate.
If
this
is
not correct
for
the local supply,
proceed
as follows.
(2)
Unplug
the
power
cable from
the
supply
and
extract the
two screws
securing the
locking plate
and remove
the plate.
(3)
Refer
to
Table
4 below
and
set
the slide switches
to
the positions
for
the required
voltage range. The
switches are referred
to
as
left
hand and
right
hand
as
seen
when
viewing
the rear
of
the instrument.
(4)
Ease the plate over the slide switches such
as to
align the
screw
holes.
Secure the plate
with the two screws previously removed.
(5)
Verify
that the
cut-away
in
the plate allows
the
required
voltage
range marking
to
be seen.
TABLE 4
Mains Voltage Selection Switches
Switch
Settings
Instrument
Voltage
Range
For Local
AC
Supply
Left
Hand
Switch*
*
Right
Hand
Switch
Down
Up 94V
to
MOV
Up Up
MOV
to
130
V
Down
Down
188V
to
220V
Up
Down
220V
to
260V
*Left
and
right
are
as
seen
when
looking at the rear of the instrument.
9081
&
9082 Vol.2.
5-1