Keithley 2601B Quick Start Manual - Safety Precautions
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 rated
Measurement Category I and Measurement Category 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
overvoltages. Measurement Category II connections require protection for high
transient overvoltages 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. Main supply
voltage fluctuations not to exceed ±10 % of the nominal voltage.
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.
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 connecting cables, test leads, and
jumpers for possible wear, cracks, or breaks before each use.