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The instrument and accessories must be used in accordance with its
specifications
and operating instructions
or the safety oftbe equip-
ment may be impaired.
Do not exceed the maximum signal levels ofthe instruments and ac-
cessories, as defined in the specifications
and operating
informa-
tion, and us shown on the instrument
or test fixture
panels, or
switching
card.
When fuses are used in a product, replace with same type and rating
for continued
protection
against fire hazard.
Chassis connections
must only be used as shield connections
for
measuring circuits, NOT as safety earth ground connections.
If you are using a test fixture, keep the lid closed while power is up-
plied to the device under test. Safe operation
requires the use of a
lid interlock.
Ifa @
screw is present, connect it to safety earth ground using the
wire recommended
in the user documentation.
Then
symbol on a" instrument indicates that the user should re-
fer to the operating
instructions
located in the manual.
Them
symbol on an instrument shows that it can source or mca-
sure 1000 volts or mom, including
the combined
effect of normal
and c",,,,,,~"
mode voltages.
Use standard safety precautions
to
avoid personal contact with these voltages.
The WARNING
heading in a manual explains dangers that might
result in personal injury or death. Always read the associated infor-
mation very carefully
before performing
the indicated procedure.
The CAUTION
heading in a manual explains hazards that could
damage the instmmcnt.
Such damage may invalidate
the warranty.
Instrumentation
and accessories shall not be connected to humans.
Before performing
any maintenance,
disconnect
the line cord and
all test cables.
To maintain
protection
from electric
shock and fire, replaccmcnt
components
in mains circuits, including
the power transformer,
test
leads, and input jacks, must be purchased
from Kcithlcy
Instm-
men&
Standard fuses, with applicable
national
safety approvals,
may be used if the rating and type are the same. Other components
that are not safety related may be purchased from other suppliers as
long as they are equivalent to the original
component.
(Note that se-
lected pans should be purchased only through Keithlcy
Instruments
to maintain
accuracy and functionality
of the product.)
If you are
unsure about the applicability
of a replacement
component,
call a
Keithley
Instruments
office for information.
To clean an instrument,
use a damp cloth or mild, water based
cleaner. Clean the exterior
of the instrument
only. Do not apply
cleaner directly
to the instrument
or allow liquids to enter or spill
on the instrument.
Products that consist of a circuit board with no
case or chassis (C&L data acquisition
board for installation
into a
computer)
should "ever require cleaning if handled according
to in-
structions.
If the board bccames contaminated
and operation
is af-
fected,
the board should be returned
to the factory
for proper
clca"i"glservici"g.
Rev. IO199
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