Safety Precautions - Keithley 2280 Series Quick Start Manual

Safety precautions

Observe the following safety precautions 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 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 is the individual or group responsible for 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 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 V DC 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 prevented 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 1000 V, no conductive part of the circuit may be exposed.