Bedienungsanleitung Keithley 2002 (Seite 4 von 366) (Englisch)

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When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input power

disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.

For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under te

st.

ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting cables or jumpers,

installing or removing switching cards, or making internal changes, such as installing or removing jumpers.

Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) gro

und. Always

make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured.

The instrument and accessories must be used in accordance with its specifications and operating instructions, or the safety of the

equipment may be impaired.

Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating inform

ation,

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 documentation.

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 W

ARNING heading in the user documentation explains dangers that might result in personal injury or death. Always read the

associated information very carefully before performing the indicated procedure.

The CA

UTION 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, tes

t 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 cl

eaner

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.

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Keithley 2002 Seite 4

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