Preparation For U S E - Kenwood MS-1660 Instruction Manual

SAFETY
Before connecting the instrument to a power source,
carefully read the following information, then verify that
the proper power cord is used and the proper line fuse is in-
stalled for power source. T h e specified voltage is s h o w n at
the right side of the power connector on the rear panel. If
the power-cord is not applied for specified voltage, there is
always a certain amount of danger from electric shock.
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.
EQUIPMENT PROTECTION
1. Before putting this instrument in use, make sure that
the power source selector switch is set to the proper
position that corresponds to the line voltage.
selector switch is not properly set, this causes damage
to the instrument. Connect the power cord to the
power receptacle only after this confirmation is made.
2. T h e MS-1660 should be installed at a place meeting the
following conditions:
o The MS-1660 is not exposed to direct sunlight.
o Temperature and humidity are not very high. T h e air
does not contain many dust particles,
o T h e surrounding facilities and equipment do not
produce intense mechanical vibration, magnetic force,
or impulse voltage.
3. Never apply more than the maximum rated voltage to
the oscilloscope input jacks.
C H 1 , C H 2 input jacks:
500Vp-p or 2 5 0 V ( D C + A C p e a k )
A E X T T R I G , Z A X I S input jacks:
5 0 V ( D C + ACpeak)
Never apply external voltage to the oscilloscope output
terminals.
4. When desiring to retain the stored waveform while the
instrument is powered off, push the F R E E Z E switch
before turning off the power. Keep the F R E E Z E switch
pressed while the power is turned off.
to keep the F R E E Z E switch pressed when the instru-
ment is powered on again to reproduce the stored wave-
f o r m . Note that, if input signal source is in connection
with the instrument when the power is turned o n , the
stored waveform will be erased by the write operation
started with an input signal.
The upper 3 bits of the address switches for G P - I B must
be set to the lower positions.
6

PREPARATION FOR U S E

If the
10. A l w a y s ground the instrument using the F R A M E side of
It is desirable
Power cord
The ground wire of the 3-wire ac power plug places the
chassis and housing of the memory scope at earth ground.
Do not attempt to defeat the ground wire connection or
float the memory scope to do so may pose a great safety
hazard. T h e appropriate power cord is supplied by an
option that is specified when the instrument is ordered.
The optional power cords are shown as follows in Fig. 4 0 .
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 fuse.
5. Do not increase the intensity more than required.
6. Never allow a small spot of high brilliance to remain on
the screen for extended periods of time.
7. When using this instrument in X - Y mode, set the P U L L -
X 1 0 M A G switch to the P U S H position. If this switch is
set to the P U L L position, the waveform may be disturb-
ed by noise.
8. Never cover the ventilating holes in the top of the scope,
as this will increase the operating temperature inside the
case.
9. When removing the case, observe the maintenance in-
struction contained in this manual to prevent a safety
hazard because this instrument contains high voltage
circuits.
the G N D terminals on the rear panel to prevent a safety
hazard.
1 1 . When turning on and off the P O W E R switch repeatedly,
keep an interval of about 5 seconds. Faster on and off
operation may cause malfunction to the instrument.