Keithley Instruments
Model TRX-1100V-X
TRX-1100V-.5
0.5 m (1.6 ft)
TRX-1100V-2
2 m (6.6 ft)
TRX-1100V-3
3 m (9.8 ft)
28775 Aurora Road
Cleveland, Ohio 44139
1-800-935-5595
tek.com/keithley
3-Slot HV Low-Noise Triaxial Cable Instructions
Description
The Keithley Instruments TRX-1100V-X is a 3-slot high-voltage, l ow-noise triaxial cable. Examples of how you
can use this cable are applications that characterize and test high-voltage, low-leakage devices, m aterials, and
modules, such as silicon carbide (SiC), gallium nitride (GaN), power MOSFETs, transient suppression devices,
circuit protection devices, power modules, and bat teries where high-voltage sourcing and low-current
measurements are required.
This cable is commonly used with the Keithley Instruments Model 2470 High Voltage SourceMeter
Figure 1: TRX-1100V-X triaxial cable
®
Instrument.
Dimensions
Part number Length
TRX-1100V-1 1 m (3.3 ft)
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Model TRX-1100V-X 3-Slot HV Low-Noise Triaxial Cable Instructions
Electrical characteristics
Leakage current:
-12
Center conductor to inner shield: < 100 x 10
Inner shield to outer shield: < 100 x 10
-9
A at 1200 VDC
A at 1200 VDC
Working voltage: 1200 V
center conductor to inner shield; 1500 V
PEAK
shield to outer shell
Flexural noise:
Peak to peak ≤ 75 mV
Standard deviation ≤ 7 mV
Operating environment: 0 °C to 50 °C up to 70% relative humidity at ≤ 35 °C
Cable assembly resistance:
Center conductor: < 0.3 Ω·m
Inner shield: < 0.05 Ω·m
Breakdown voltage (dwell time of 5 s):
2500 VDC center conductor and inner shield to out er shell
Characteristic impedance:
40 Ω nominal center conductor to inner shield
15.3 Ω nominal shield to shield
center conductor and inner
PEAK
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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 nonhaz ardous 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 safet y prec autions 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 li mits, and for ensuring that operat or s are adequately trained.
Operators use the product for its int ended function. They must be trained in electrical safety procedures and proper use of the
instrument. They must be protected from electric shock and contact wit h 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, t hey should be performed only by service pe r sonnel.
Service personnel are trained to work on live circuits, perform saf e i ns tallations, and repair products . Only properly trained
service personnel may perform ins tallation and service procedures.
Keithley products are designed f or use with electrical signals that are measurement, control, and data I/O connections, with low
transient overvoltages, and mus t not be directly connected to mains voltage or to voltage sources with high transient
overvoltages. Measurement Cat egory II (as referenced in IEC 60664) connections require protection for high transient
overvoltages often associated with local AC mains connections. Certain Keithley measuring instrument s may be connected to
mains. These instruments will be marked as category II or higher.
Unless explicitly allowed in the spec i fications, 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 j ac ks or test
fixtures. The American National S tandards Institute (ANSI) states that a shock hazard exists when volta ge l evels 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 protec ted from electric shock at all tim es. The responsible body must ensure t hat operators
are prevented access and/or insulated from every connection point. In s ome cases, connections must be expose d to potential
human contact. Product operators i n these circumstances must be trained to protect themselves from the risk of el ec tric shock. If
the circuit is capable of operating at or above 1000 V, no conductive part of the circuit may be exposed.
For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to t he c i rcuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting
cables or jumpers, installing or rem oving switching cards, or making i nternal 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 (e arth)
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 s pecified in the operating instructions, the protection provided by t he equipment may be
impaired.
Do not exceed the maximum signal lev els of the instruments and accessories. Maximum signal levels are defined in the
specifications and operating inf or mation and shown on the instrument panels, test fixture panels, and switching cards.
Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground)
connections.
The WARNING heading in the user documentation explains hazards that might result in personal injury or death. Always read
the associated information very car efully before performing the indic ated procedure.
071365000 / May 2019 3
The CAUTION heading in the user documentation explains hazards that could damage the ins trument. Such damage may
invalidate the warranty.
The CAUTION heading with the
injury or damage the instrument. Always re ad the associated information ver y car efully before performing the indic ated
procedure. Damage to the instrument 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 — inclu ding the power
transformer, test leads, and input j ac ks — must be purchased from Keithley. Standard fuses with applica bl e national safety
approvals may be used if the rating and type are the same. The detachable mains power cord provided with the instrument may
only be replaced with a similarly rated power cord. Other components that are not safety-related may be purc hased from other
suppliers as long as they are equivalent to the original component (note that selected parts should be purchased only through
Keithley to maintain accuracy and f unctionality of the product). If you are unsure about the applica bility of a replacement
component, call a Keithley office for information.
Unless otherwise noted in product-specific literature, Keithley instruments are designed to operat e i ndoors only, in the following
environment: Altitude at or below 2,000 m (6,562 ft); temperature 0 °C to 50 °C (32 °F to 122 °F); and pollution degree 1 or 2.
To clean an instrument, use a cloth dampened with deionized water 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 boar d becomes contaminated and operation is affected, the board
should be returned to the factor y for proper cleaning/servicing.
Safety precaution revision as of J une 2017.
symbol in the user documentation explains hazards that could result in moderate or minor
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