Keithley 707B Quick Start Manual - page 4
CAUTION
This 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.