Hitachi V-209, Operation Manual

Page: 9 / 47

washing agent and then leave them stand until the moisture
is removed naturally.
o
If the screen is installed while it is moistened, water
rings may be formed and the wavefom1 may be blurred
to make observation hard. Pay attention not to leave
finger prints on it.
To dismount it, pull it toward
you pressing it at the both
ends.
Operation precautions
Bcz:el
*
C he
c
k the line voltage is in the range specified in the table
below.
Rating
Allowable line voltage (50/60Hz)
ACIOOV AC90V 130V
AC200V
ACI80V 260V
Usually the voltage selector switch on the rear of the V -209
has been set to IOOV AC at the factory. When this is operat­
ed on 200AC voltage, set the selector switch to 200 V AC.
(Rated voltages are marked above the power connector on
the rear panel.)
*
Use only specified fuses
In order to protect the circuit against over-current, a 0.5A
(in primary side of power circuit) and 2 A (in secondary
side of power circuit) are used. When the fuses blow out,
check thoroughly the cause. repair any faulty point present.
and then replace them with specified fuses. 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.
Shape
JIS type name
{Diameter
x
length) mm
2A
6.35cf>
X
31.8
MF6JNM250V 2A AC
lA 6.35¢
X
31.8 MF61 M250V lA AC
0.5A 6.35¢
X
31.8 MF61 M250V 0.5A AC
*
-(negative) terminal of EXT DC I is inside connected to
case ground. Do not connect - (negative) terminal of the
V-209 to the
+
(positive) grounded case of other instru­
ments with common external DC power source to the
V-209. If not, it is very dangerous because a large current
nows through the grounded line.
5