Model 8020-STC
Keithley Instruments
28775 Aurora Road
Cleveland, Ohio 44139
1-800-935-5595
http://www.keithley.com
Kelvin Standard Triaxial Connector Card
Description
The Model 8020-STC Kelvin Standard Triaxial Connector Card provides standard triaxial connections for sense
and force connections on the Model 8020 High Power Interface Panel. Use this connector card to connect to a
device under test using standard triaxial connectors. This connector card can be installed in the following Model
8020 channels:
• 200 V channels 1 through 3
• Common LO/SLO
Figure 1: Model 8020-STC, front view
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Figure 2: Model 8020-STC, side view (shown with Model 8020-TLV protective cover)
Model 8020-STC
You can use the following Keithley Instruments cables to connect to this card:
• Model 7078-TRX-*
• Model 4200-TRX-*
Installing the Model 8020-TLV protective cover
The Model 8020-STC is supplied with the Model 8020-TLV protective cover. To ensure safety in systems that
also use a Model 2657A on another device terminal, you must install the Model 8020-TLV after connecting the
triaxial cable to the Model 8020-STC connector card. Refer to the Model 8020 High Power Interface Panel
User's Manual for connector card installation instructions.
Once you have the card installed and the Model 8020 top cover is reattached and secured, you will have to
connect the triaxial cables to the connectors. Note that the Model 8020-STC card has two screw holes that are
used for the Model 8020-TLV protective cover.
Figure 3: Model 8020-STC connector card slot
Next, you will have to attach the Model 8020-TLV protective cover. Slide the cover over the triaxial cables and
insert the screws. Make sure that the screws are tightened to the Model 8020-STC connector card.
Figure 4: Model 8020-STC connector card slot with protective cover
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Model 8020-STC
Electrical char ac ter i stics
The following characteristics apply when used with the Model 8020:
• Voltage: 240 V maximum
• Connector current, fuse installed: 1.5 A maximum, 10 A pulsed, 1 ms at 2.2 percent duty cycle
• Connector current, fuse removed: 1 ADC, no pulsing
• Connector types: 3-lug triaxial
®
• Fuse: 10 A, 32 V, MINI
Figure 5: Connector conductors when installed in the 2600/4200 channels of the Model 8020
blade-style
Figure 6: Connector conductors when installed in the Common LO, SLO channel of the Model 8020
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Model 8020-STC
Dimensions
Figure 7: 8020-STC dimensions
Installation
See the Model 8020 User's Manual for installation information, available for download on the Keithley
Instruments website Support page.
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Model 8020-STC
Enabling transient overcurrent protecti on
Each connector card contains a 10 A fuse to allow maximum pulse current from each SMU instrument.
Removing this fuse enables transient overcurrent protection. This transient overcurrent protection is useful for
protecting probes and other sensitive interface hardware at the device under test. For more information, see the
Model 8020 High Power Interface Panel User's Manual.
Transient overcurrent protection is only available on the 200 V channels within the Model 8020. W hen using a
connector card in the HV channel, be sure that the 10 A fuse is installed.
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Safety precaut ions
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 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 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 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 instru ment 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.
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.
When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input
power disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.
For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting
cables or jumpers, installing or removing sw itch ing cards, or mak ing inter nal changes, such as installing or removing jumpers.
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 hands while standing on a dry, insulated surface capable of withstanding the
voltage being measured.
For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or
accessories are used in a manner not specified in the operating instructions, the protect ion prov ided by the equipm ent ma y be
impaired.
Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating
information, and as shown on the instrument or test fixture panels, or switching card.
When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground)
connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use
of a lid interlock.
If a
The
user documentation in all cases where the symbol is mark ed on the instru ment .
The s ymbol on an instrument means caution, risk of electric shock. Use standard safety precautions to avoid personal
contact with these voltages.
The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.
The
If this
properly disposed of according to federal, state, and lo cal law s.
The WARNING heading in the user documentation explains dangers that might result in personal injury or death. Always read
the associated information very carefully before performing the indicated procedure.
The CAUTION heading in the user documentation explains h az ards that coul d dama ge the instr ume nt. Such dam age 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.
To maintain protection from electric shock and fire, replacement components in mains circuits — including the power
transformer, test leads, and input jacks — must be purchased from Keithley Instruments. Standard fuses with applicable national
safety approvals may be used if the rating and type are the same. Other components that are not safety-relat ed 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 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 office for information.
screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.
s ymbol on an instrument means caution, risk of danger. The user must refer to the operating instructions located in the
s ymbol indicates a connection terminal to the equipment frame.
s ymbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be
To clean an instrument, use a damp cloth or mild, water-based cleaner. Clean the exterior of the instrument only. Do not apply
cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with
no case or chassis (e.g., a data acquisition board for installation into a computer) should never require cleaning if handled
according to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the
factory for proper cleaning/servicing.
Safety precaution revision as of January 2013.
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