Hitachi V-355 Operation Manual page 8

O p eration p recautions
*
Check the line voltage.
The operating voltage range of this oscilloscope is as shown
below. Check the line voltage without fail before turning
on the p ower switch.
Rating Line Voltage (50/60Hz)
AC I OOV AC 90V- l l OV
AC I 20V
AC I 08V - I 3 2V
AC220V AC I 9 8V - 242V
AC 240V AC 2 I 6V - 264V
Nominal volts ±5% at 400Hz .
In the case of normal shipment, the voltage selector will
be set convenient for user. When it is intended to use the
oscilloscope on anothe r voltage rating, voltage selector
can be turned . (Rated voltages are indicated on the rear
panel of the oscilloscope .)
*
Use only specified fuses.
In order to protect the circuit against overcurrent ,.a fuse of
2A (for AC I OOV or AC I 20V) or I A (for AC 220V or AC
240V) is used on the p rimary side of power supply . When
this fuse is blows out, check thoroughly the cause , repair
any faulty point present, and then replace with a specified
fuse . Do not try to use the fuse other than the specified
ones. Otherwise , fault may be caused or danger may be
invited .
(Particularly , do not use a fuse different from the specified
one in current capacity and in length . } The standards of
the fuses are as follows.
Dimensions
x
(Diameter length)mm
x
2A 6 .3 5</> 3 1 .8
x
I A
6 .3 5 </> 3 1 .8
*
Do not increase the brightness too much.
Do not increase the brightne ss of the spot and trace too
much . Your eyes may be strained and the fluorescent sur­
face of CRT may be burnt.
*
Do not apply an excessive voltage.
The input withstand voltage of each input connector and
probe input is as follows. Never apply a voltage higher than
specifie d .
INPUT direct, 300V (DC
x
When IO prob e is u sed
400V (DC
x
When 1 probe is used
300V (DC+ AC peak at l kHz)
Type number
MF6 I NM250V 2A AC
MF6 I NM250V I A AC
+
AC peak at 1 kHz)
+
AC peak at 1 kHz)
5