Keithley S500 Administrative Manual Download Page 6

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Do not exceed the maximum signal levels of the instruments
and accessories, as defined in the specifications and
operating information, and as shown on the instrument or test
fixture panels, or switching card.
When fuses are used in a product, replace with the 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 applied to the device under test. Safe operation requires
the use of a lid interlock.
If a

screw is present, connect it to safety earth ground

using the wire recommended in the user documentation.

The

symbol on an instrument indicates that the user

should refer to the operating instructions located in the user
documentaion.

The

symbol on an instrument shows that it can source

or measure 1000V or more, including the combined effect of
normal and common mode voltages. Use standard safety
precautions to avoid personal contact with these voltages.

The

symbol on an instrument shows that the surface

may be hot. Avoid personal contact to prevent burns.

The

symbol indicates a connection terminal to the

equipment frame.

If this

symbol is on a product, it indicates that mercury is

present in the display lamp. Please note that the lamp must
be properly disposed of according to federal, state, and local
laws.

The

WARNING

heading in a manual explains dangers that

might result in personal injury or death. Always read the
associated information very carefully before performing the
indicated procedure.

The

CAUTION

heading in the user documentation explains

hazards that could damage the instrument. 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,
replacement components in mains circuits - including the
power transformer, test leads, and input jacks - must be
purchased from Keithley Instruments. 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
selected parts should be purchased only through Keithley
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 (e.g., a data acquisition
board for installation into a computer) should never require
cleaning if handled according to instructions. If the board
becomes contaminated and operation is affected, the board
should be returned to the factory for proper cleaning/
servicing.