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PREPARATION FOR U S E
S A F E T Y
Before connecting the instrument to a power source, carefully read the following infor-
mation, then verify that the proper power cord is used and the proper line fuse is installed
for power source. T h e specified voltage is s h o w n at the left side of the power cord on
the rear panel. If the power cord is not applied for specified voltage, there is a l w a y s a
certain amount of danger from electric shock.
Line voltage
This instrument operates using A C - p o w e r input voltages that 1 0 0 / 1 2 0 / 2 2 0 / 2 4 0 V at fre-
quencies from 5 0 Hz to 6 0 Hz.
Power cord
The ground wire of the 3-wire A C power plug places the chassis and housing of the oscil-
loscope 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 fuse.
EQUIPMENT PROTECTION
1. Never allow a small spot of high brilliance to remain stationary on the screen for more
than a f e w seconds. T h e 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.
2. Never cover the ventilating holes on the top of the oscilloscope, a s this will increase
the operating temperature inside the c a s e .
3 . Never apply more than the maximum rating to the oscilloscope inputs.
^ C H 1 , C H 2 INPUT j a c k s :
8 0 0 Vp-p or 4 0 0 V ( D C + A C peak)
E X T T R I G INPUT jack:
5 0 V (DC + A C peak)
Never apply external voltage to the oscilloscope output terminals.
4 . A l w a y s connect a cable from the earth ground (GND) terminal 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 cir-
c u m s t a n c e s . S u c h conditions could also pose a safety hazard, w h i c h the ground cable
will prevent.
5. 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.
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