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Model 2450
Quick Start Guide
Safety precautions
Observe the following safety precautions before using this product and any associated Service personnel are trained to work on live circuits, perform safe installations, and
instrumentation. Although some instruments and accessories would normally be used repair products. Only properly trained service personnel may perform installation and
with nonhazardous voltages, there are situations where hazardous conditions may be service procedures.
present. Keithley Instruments products are designed for use with electrical signals that are
This product is intended for use by qualified personnel who recognize shock hazards measurement, control, and data I/O connections, with low transient overvoltages and
and are familiar with the safety precautions required to avoid possible injury. Read and must not be directly connected to mains voltage or to voltage sources with high
follow all installation, operation, and maintenance information carefully before using the transient overvoltages. Measurement Category II (as referenced in IEC 60664)
product. Refer to the user documentation for complete product specifications. connections require protection for high transient overvoltages often associated with
If the product is used in a manner not specified, the protection provided by the product local AC mains connections. Certain Keithley measuring instruments may be connected
warranty may be impaired. to mains. These instruments will be marked as category II or higher.
The types of product users are: Unless explicitly allowed in the specifications, operating manual, and instrument labels,
do not connect any instrument to mains.
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 Exercise extreme caution when a shock hazard is present. Lethal voltage may be present
operating limits, and for ensuring that operators are adequately trained. on cable connector jacks or test fixtures. The American National Standards Institute
Operators use the product for its intended function. They must be trained in electrical (ANSI) states that a shock hazard exists when voltage levels greater than 30 V RMS,
safety procedures and proper use of the instrument. They must be protected from 42.4 V peak, or 60 V DC are present. A good safety practice is to expect that hazardous
electric shock and contact with hazardous live circuits. voltage is present in any unknown circuit before measuring.
Maintenance personnel perform routine procedures on the product to keep it 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
operating properly, for example, setting the line voltage or replacing consumable
every connection point. In some cases, connections must be exposed to potential
materials. Maintenance procedures are described in the user documentation. The
human contact. Product operators in these circumstances must be trained to protect
procedures explicitly state if the operator may perform them. Otherwise, they should be
themselves from the risk of electric shock. If the circuit is capable of operating at or
performed only by service personnel.
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 When fuses are used in a product, replace with the same type and rating for continued
to be used with impedance-limited sources. NEVER connect switching cards directly to protection against fire hazard.
AC mains. When connecting sources to switching cards, install protective devices to Chassis connections must only be used as shield connections for measuring circuits,
limit fault current and voltage to the card. NOT as protective earth (safety ground) connections.
Before operating an instrument, ensure that the line cord is connected to a If you are using a test fixture, keep the lid closed while power is applied to the device
properly-grounded power receptacle. Inspect the connecting cables, test leads, and under test. Safe operation requires the use of a lid interlock.
jumpers for possible wear, cracks, or breaks before each use.
If a screw is present, connect it to protective earth (safety ground) using the wire
When installing equipment where access to the main power cord is restricted, such as recommended in the user documentation.
rack mounting, a separate main input power disconnect device must be provided in This symbol on an instrument means caution, risk of danger. The user should refer
close proximity to the equipment and within easy reach of the operator. to the operating instructions located in the user documentation in all cases where
For maximum safety, do not touch the product, test cables, or any other instruments the symbol is marked on the instrument.
while power is applied to the circuit under test. ALWAYS remove power from the This symbol on an instrument means caution, risk of electric shock. Use standard
entire test system and discharge any capacitors before: connecting or disconnecting
safety precautions to avoid personal contact with these voltages.
cables or jumpers, installing or removing switching cards, or making internal changes,
such as installing or removing jumpers. This symbol on an instrument shows that the surface may be hot. Avoid personal
contact to prevent burns.
Do not touch any object that could provide a current path to the common side of the
circuit under test or power line (earth) ground. Always make measurements with dry This symbol indicates a connection terminal to the equipment frame.
hands while standing on a dry, insulated surface capable of withstanding the voltage
being measured. If the mercury symbol is on a product, it indicates that mercury is present in the
display lamp. Please note that the lamp must be properly disposed of according to
For safety, instruments and accessories must be used in accordance with the operating
federal, state, and local laws.
instructions. If the instruments or accessories are used in a manner not specified in the
operating instructions, the protection provided by the equipment may be impaired. WARN IN G This heading in the user documentation explains dangers that might result
in personal injury or death. Always read the associated information very
Do not exceed the maximum signal levels of the instruments and accessories, as defined
carefully before performing the indicated procedure.
in the specifications and operating information, and as shown on the instrument or test
fixture panels, or switching card. CAUTION This heading in the user documentation explains hazards that could
damage the instrument. Such damage may invalidate the warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
Power and environmental specifications
To maintain protection from electric shock and fire, replacement components in mains For indoor use only.
circuits -- including the power transformer, test leads, and input jacks -- must be
purchased from Keithley Instruments. Standard fuses with applicable national safety Power supply 100 V to 240 V RMS, 50 Hz to 60 Hz (autosensing)
approvals may be used if the rating and type are the same. Other components that are
Maximum VA 150 VA
not safety-related may be purchased from other suppliers as long as they are equivalent
to the original component (note that selected parts should be purchased only through Operating altitude Maximum 6562 ft (2000 m) above sea level
Keithley Instruments to maintain accuracy and functionality of the product). If you are
unsure about the applicability of a replacement component, call a Keithley Instruments Operating 32