Safety precautions
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 nonhazardous voltages, there are situations where hazardous conditions may be
present.
This product is intended for use by 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 is 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
measurement, control, and data I/O connections, with low transient overvoltages, and must
not be directly connected to mains voltage or to voltage sources with high transient
overvoltages. Measurement Category II (as referenced in IEC 60664) connections require
protection for high transient overvoltages often associated with local AC mains connections.
Certain Keithley Instrument measuring instruments may be connected to mains. These
instruments will be marked as category II or higher.
Unless explicitly allowed in the specifications, operating manual, and instrument labels, do
not connect any instrument to mains.
Exercise extreme caution when a shock hazard is present. Lethal voltage 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 30 V RMS, 42.4 V peak,
or 60 VDC are present. A good safety practice is to expect that hazardous voltage is present
in any unknown circuit before measuring.
