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SAFETY
Before connecting the instrument to the power source, care-
fully read the following information, then verify that the
power cord and power line fuse are ones for your power line.
The instrument's rear panel has a fuse holder on the left of
the A C inlet terminal (the fuse holer also serves as a vol-
tage selector). T h e value under the triangle • marked on
the holder indicates the line voltage set for the instrument.
If the power cord is not applied with the correct voltage,
there is a danger from electric shock.
•
When converting the voltage, refer to the Maintenance
section.
Line voltage
This instrument operates using ac-power input voltages that
1 0 0 / 1 2 0 / 2 2 0 / 2 4 0 V at frequencies from 5 0 Hz to 6 0 Hz.
Power cord
The ground wire of the 3-wire ac power plug places the
chassis and housing of the oscilloscope at earth ground. Do
not attempt to defeat the ground wire connection or float
the oscilloscope; to do so may pose a great safety hazard.
The appropriate power cord is supplied by an option that
is specified w h e n the instrument is ordered.
The optional power cords are s h o w n as follows in Fig. 1 .
Line fuse
The fuse holder is located on the rear panel and contains
the line fuse. Verify that the proper fuse is installed by
replacing the line f u s e .
EQUIPMENT PROTECTION
1 . Never use the instrument in the following conditions
where:
1)
T h e instrument is exposed to direct sunlight.
2)
T h e temperature and humidity is too high.
3)
Much mechanical vibrations are produced.
4)
T h e instrument is exposed to explosive gas.
2 . Never allow a small spot of high brilliance to remain sta-
tionary on the screen for more than a few seconds. The
screen may become permanently burned. A spot will
occur only w h e n the scope is set up for X - Y operation
and no signal is applied. Either reduce the intensity so
the spot is barely visible, s w i t c h back to normal s w e e p
operation w h e n no signal is applied, or set up the scope
for spot blanking.
3 . Never cover the ventilating holes on the top of the os-
cilloscope, as this will increase the operating tempera-
ture inside the c a s e .
4 . Never apply more than the maximum rating to the os-
cilloscope inputs.
C H 1 to C H 4 : 8 0 0 Vp-p or 4 0 0 V (DC + A C peak)
Z a x i s : 5 0 V (DC + A C peak)
Never apply external voltage to the oscilloscope out-
put terminals.
PRECAUTIONS
5. A l w a y s connect a cable from the earth ground (GND)
jack of the oscilloscope to the chassis of the equipment
under test. Without this caution, the entire current for
the equipment under test may be d r a w n through the
probe clip leads under certain circumstances. Such con-
ditions could also pose a safety hazard, w h i c h the
ground cable will prevent.
6. A l w a y s use the probe ground clips for best results. Do
not use an external ground wire in lieu of the probe
ground clips, as undesired signals may be introduced.
7. Operation adjacent to equipment w h i c h produces strong
ac magnetic fields should be avoided where possible.
This includes s u c h devices as large power supplies,
transformers, electric motors, etc., that are often found
in an industrial environment. Strong magnetic shields
can e x c e e d the practical C R T magnetic shielding limits
and result interference and distortion.
8. Probe compensation adjustment m a t c h e s the probe to
the input of the scope. For best results, compensation
of probe should be adjusted initially, then the same pro-
be a l w a y s used with the input of scope. Probe compen-
sation should be readjusted w h e n e v e r a probe from a
different scope is used. (See page 2 6 )
9. When turning on and off the P O W E R s w i t c h repeated-
ly, keep an interval of about 5 s e c o n d s . Faster on and
off operation may cause malfunction to the instrument.
10. Do not use the provided P C - 3 1 probe w i t h other meas-
uring equipment because it incorporates a terminal for
R E A D O U T detection w h i c h might damage the other
equipment.
1 1 . The calendar, clock, and set values on the panel are
backed up by a built-in battery. If the battery is about
to expire its life, " B A T T . D O W N " is displayed on the
calendar and clock display, and data set with controls
on the panel are not stored but initialized. T h e battery
should be replaced. A s to battery replacement, please
inquire at our distributer where you purchased the in-
strument.
Note:
Initial Setting
V E R T I C A L MODE
: C H 1
A C - D C coupling
: A C
T R I G G E R I N G MODE
: A U T O
T R I G G E R I N G S O U R C E
: V E R T or C H 1
T R I G G E R I N G C O U P L I N G : A C
H O R I Z O N T A L MODE
: A
T h e other s w i t c h e s are all off
C H 1 V O L T S / D I V
: 5 0 mV/div
S W E E P T I M E
: 5 0 /is/div
7
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