Rohde & Schwarz ZPV - Preparation for Use

2.2
Preparation
for
Use
2.2.1
Exchanging
the
Plug-in
After
unlocking
the
plug-in
(_l),
it
can
be
withdrawn
and
exchanged;
the
new
plug-in
should
be
locked
again.
During
this
procedure
the
ZPV
must
be
switched
off.
2.
2.2
__
Adjusting
to
the
Local
AC
Supply
The
instrument
is
factory-set
for
an
AC
supply
voltage
of
220 V,
the
fre-
quency
range
covering
47
to
420
Hz. Qr
changing
the
position
of
the
voltage
selector
43,
the
ZPV
can
be
operated
also
from
a
11,5,
125
or
235
V
supply.
To
this
effect
the
fuse
in
4_3
is
unscrewed
and
the
cover
of
the
voltage
selector
withdrawn.
Then
the
cover is
reinserted
such
that
the
mark
points
to
the
desired
AC
supply,
voltage
and
the
corresponding
fuse
is
screwed
in:
T
1,25
B
for
115
or
125
V
T
0,63
B
for
220
or
235
V.
The
AC
supply
is
connected
to
42
using
the
supplied
power
cord.
Die
instrument
performance
is
not
affected
by
AC
supply
fluctuations
of
+10/o
from
nominal.
In
the
case of
greater
variations,
a
transformer
or a
voltage
regulator
should
be
connected
ahead
of
the
ZPV.
2.2.3
Setting
up
The
ambient
temperature
should
not
exceed
45
C;
for
this
reason,
direct
insolation
is
to
be
avoided.
To
permit
easy
reading
of
the
test
results,
a
tilt
stand
can be
swung
out
on
the
bottom
of
the
instrument.
The
ZPV
is
fully
isolated
from
the
AC
supply
and
provided
with
safety
earthing.
Chassis
connection
to
the
test
item
is
made
via
the
plug-in.
If
required,
an
additional
ground
connection
can
be
established
at
the
lefthand,
lower
screw
fixing
the
front
panel.
2.2.4
Switching
on
To
switch
the
ZPV
on,
button
18 is
pressed;
the
instrument
is
ready
for
operation
after
about
1
s.
When
the
ZPV
is
switched
on,
the
buttons
and
the
readout
should
light
up.
R 35054
-
9