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 Instruments 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.