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Leader Electronics Corp. LBO-522 - Notes on Operation; Power Source Voltage; Signal Input; Influence of Strong Magnetic Field

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3.
NOTES
ON
OPERATION
3.1
P
ower
Source
Voltage
Apply
the
AC
power
of
a
voltage
that
is
within
i
10%
variation
of
the
rated
voltage
as
given
in
the
table
below.
Operating
at
a
voltage
below
10%
or
more
variation
of
rated
value
may
result
in
im¬
proper
performance
of
the
LBO-522/523.
A
voltage
applied
more
than
10%
variation
of
the
rated
value
may
damage
the
powersupply
circuitry.
The
built-in
power
transformer
has
taps
of
100
and
120V.
Five
different
types
of
voltage
ratings
can
be
selected
by
rewiring
the
taps
as
shown
in
the
figures
shown
below.
Note
the
fuse
rating
and
type
when
the
power
voltage
is
changed.
Rating
voltage
Voltage
range
(±10%)
Fuse
rating
100
V
120
V
90
—110V
110~
130V
1
1A
j
TIME
LAG
200V
220V
240V
180-220V
200
~
240V
220
-
260V
l
0.5A
J
TIME
LAG
Terminal
Arrangement
and
Wiring
Diagram
of
the
Power
Transformer
Terminal
arrangement
t»V
Itt'iv
i2t)V
ov
100V
120V
WUUTTU
lOfiV
h
1
:
3
0
A
0
0
W
120V
0V
100V
120V
3
12
3
1
"J
o
o
i
AC
input
POWER
ON
ri
12
3
12
R
o
J~J
oov
2
r
o
o
OV
100V
120V
ov
HkiV
120V
12
3
12
3
J
fioOon
OV
IO0V
120V
0V
K'i'iV
120V
12
3
12
3
3.2
Signal
Input
Input
signals
higher
than
600V
(ACp-p
+
DC),
applied
to
terminals,
may
damage
circuit
com¬
ponents.
The
maximum
allowable
input
voltage
is:
Vertical
input
terminals
@@
INPUT:
Max.
600V
(ACp-p
+
DC)
External
synchronization
signal-input
terminal
(3()
TRIG,
or
H
IN:
Same
as
the
above
Probe
input
(LP-16AX):
Same
as
the
above
3.3
I
nfluence
of
Strong
Magnetic
Field
Operation
in
a
strong
magnetic
field
will
cause
distortion
or
swing
of
display
waveforms
or
make
an
excessive
decline
of
traces
when
the
instrument
is
used
near
an
equipment
or
transformer
of
large
power
consumption.
Therefore
avoid
to
use
the
instrument
near
such
a
magnetic
field
source.
3.4
Operation
in
a
Hot
and
Humid
Place
The
instrument
is
designed
to
operate
in
a
temper¬
ature
range
of
0°C
to
±40°C
and
relative
humidity
range
of
10
to
90%.
Operation
in
a
severe
environ¬
ment
may
shorten
the
life
of
the
instrument.
3.5
Intensity
of
CRT
Burn-resisting
flourescent
(phosphor)
material
is
used
in
the
CRT.
But
if
the
CRT
is
left
with
a
bright
dot
or
trace,
or
with
unnecessarily
raised
intensity,
its
flourescent
screen
may
be
damaged.
When
observing
waveforms,
therefore,
the
intensity
should
be
maintained
at
the
minimum
necessary
level.
If
the
instrument
is
to
be
left
with
the
power
on
for
a
long
period
of
hours,
lower
the
intensity
and
obscure
the
focus.
-
3

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