Bedienungsanleitung Keithley 2002 (Seite 3 von 366) (Englisch)

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Safety Precautions

11/07

The following safety precautions should be observed before using this product and any associated instrumentation. Although some

instruments and accessories would normally be used with non-hazardous voltages, there are situations where hazardous conditions may

be present.

This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required

to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the product. Refer

to the user documentation for complete product specifications.

If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.

The types of product users are:

Responsible body i

s the individual or group responsible for the use and maintenance of equipment, for ensuring that the equipment is

operated within its specifications and operating limits, and for ensuring that operators are adequately trained.

Operators

use the product for its intended function. They must be trained in electrical safety procedures and proper use of the instrument.

They must be protected from electric shock and contact with hazardous live circuits.

Maintenance personnel

perform routine procedures on the product to keep it operating properly, for example, setting the line voltage or

replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures explicitly state if the

operator may perform them. Otherwise, they should be performed only by service personnel.

Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained service

personnel may perform installation and service procedures.

Keithley Instruments products are designed for use with electrical signals that are rated Measurement Category I and Measurement

tegory II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement, control, and

data I/O signals are Measurement Category I and must not be directly connected to mains voltage or to voltage sources with high transient

over-voltages. Measurement Category II connections require protection for high transient over-voltages often associated with local AC

mains connections. Assume all measurement, control, and data I/O connections are for connection to Category I sources unless otherwise

marked or described in the user documentation.

Exercise extreme caution when a shock hazard is present. Lethal vo

ltage may be present on cable connector jacks or test fixtures. The

American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30V RMS, 42.4V peak,

or 60VDC are present. A good safety practice is to expect that hazardous voltage is present in any unknown circuit before measuring.

Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators are

revented access and/or insulated from every connection point. In some cases, connections must be exposed to potential human contact.

Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If the circuit is capable of

operating at or above 1000V, no conductive part of the circuit may be exposed.

Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited sources

. NEVER

connect switching cards directly to AC mains. When connecting sources to switching cards, install protective devices to limit fault current

and voltage to the card.

Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the conne

cting

cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.

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Keithley 2002 Seite 3

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