Preparation
for
Use
Safety
Before connecting the oscilloscope to a power source, read entirely both this
section and the Safety Summary at the front of this manual. Be sure you have the
training required to safely connect the instrument inputs to the signals you will be
measuring. Refer to the Safety Summary for power source, grounding, and other
safety considerations pertaining to the use of the instrument.
Line
Voltage
Selection
This instrument may be damaged if operated with the LINE VOLTAGE
SELECTOR switch set for the wrong applied ac input-source voltage or if
the vsrong tine fuse is installed.
The oscilloscope operates from either a 115-V or a 230-V nominal ac power-line
with any frequency from 48 Hz to 440 Hz. Before connecting the power cord to a
power source, verify that the LINE VOLTAGE SELECTOR switch, located on the rear
panel (see Figure
1
-1), is set correctly (see Table 1-1) and that the line fuse is
correct. To convert the instrument for operation on the other line-voltage range,
move the LINE VOLTAGE SELECTOR switch to the correct nominal ac
source-voltage setting. The detachable power cord may have to be replaced to
match the particular power source.
Line Fuse
To verify the instrument power-input fuse rating, do the following steps:
1.
Press the fuse-holder cap and release it with a slight counterclockwise
rotation.
Pull the cap (with the attached fuse inside) out of the fuse holder.
2.
Verify that the fuse is of the type listed on the back of the instrument. Then
install the proper fuse and reinstall the proper fuse-holder cap. The two
types of fuses listed are not directly interchangeable; they require different
types of fuse caps. For international power cord options, a 5x20 mm fuse
holder cap is included in the accessory pouch for use with 1.6 A, 250 V,
5x20 mm (IEC 127) fuses (not supplied).
2465B/2455B/2445B Operators
1-1
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