4
combined effect of normal and common mode voltages.
Use standard safety precautions to avoid personal con-
tact with these voltages.
The
WARNING
heading in a manual explains dangers
that might result in personal injury or death. Always read
the associated information very carefully before perform-
ing the indicated procedure.
The
CAUTION
heading in a manual explains hazards that
could damage the instrument. Such damage may invali-
date 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, re-
placement components in mains circuits, including the
power transformer, test leads, and input jacks, must be pur-
chased from Keithley Instruments. Standard fuses, with ap-
plicable 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 functional-
ity 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.,
data acquisition board for installation into a computer)
should never require cleaning if handled according to in-
structions. If the board becomes contaminated and oper-
ation is affected, the board should be returned to the
factory for proper cleaning/servicing.
10-99
2000-903-01A Page 4 Thursday, December 23, 1999 7:52 AM
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