Model 4210-MMPC-W
Keithley Instruments, Inc. Multi-measurement Prober Cable Kit
28775 Aurora Road Quick Start Guide
Cleveland, Ohio 44139
1-888-KEITHLEY
http://www.keithley.com
Overview
The Keithley Instruments Model 4210-MMPC-W multi-measurement prober cable kit (see Figure 1) provides a
collection of matched connection accessories. When properly installed, these accessories have the performance
needed that allow current-voltage (I-V), capacitance-voltage (C-V), and pul se I-V parametric characterization
measurements to be made using a single prober cable setup. This kit has been assembled for u se with a
Wentworth prober.
This prober cable kit requires the Keithley Instruments Articulated Arm (Wentworth Part Number 2026-96509).
Contact your Wentworth representative to obtain the necessary manipulator arm and instru ctions.
Quick Start Guide topics
The guide contains information about the use of this cable kit:
• Model 4200-SCS instrument connections: Explain
to the bulkhead.
• Prober bulkhead to prober pin connections (basic setup): Explains
prober bulkhead to the prober pins.
• Usage scenarios: Provide
o I-V testing (2-pin and 4-pin)
o C-V testing (2-pin and 4-pin)
o Pulse I-V measurements using the Keithley Model 4225-PMU with the Model 4225-RPM
s the following specific prober cable setups:
s how to make connections from the Model 4200-SCS
how to make connections from the
Related documents
The following documents (in PDF format) are located on the Model 4200-SCS Complete Reference CD:
• 4200-SCS Reference Manual: Section 16
The reference manual PDF can be found in the main 4200-SCS Complete Reference. Open the complete
reference web page by double-clicking the Complete Reference icon in the upper-left corner of the 4200
desktop.
• White Paper: Labs’ Demands for Greater Measurement Flexibility Require Cabling Systems Capable of
Accommodating Multiple Measurement Types
This white paper explains the different cabling requirements for I-V, C-V, and pulse I-V testing. It also
describes the concept behind this easy-to-use multi-measurement cabling system.
PA-1085 Rev. A / September 2012 1
Model 4210-MMPC-W Quick Start Guide
Prober cable kit contents
Figure 1 shows the cables, adapters, and supplies that are included in the Model 4210-MMPC-W
multi-measurement cable kit. This kit also includes the following screw (not shown): M3X12MMSSSOHCBLK
NOTE
Each kit (Model 4210-MMPC-W) supplies the required components to make sense and force
connections to one pin (additional kits are required to make additional connections).
Figure 1: Model 4210-MMPC-W multi-measurement prober cable kit
Model 4210-MMPC-W
1
2
3
4
7
5
6
Item Description Keithley
1* Prober cable assembly with
clamp (blue)
Length: 37.5 cm (14.75 in.)
2 Triaxial to BNC Adapter CS-712 3
3 Triaxial to triaxial cable (blue)
Length: 61.0 cm (24 in.)
4 Triaxial female to triaxial
female, high voltage adapter
5 Triaxial male to triaxial female,
tee
6 Triaxial shorting plug CS-1546 1
7 BNC-SMA adapter CS-1247 3
8 Ground jumper cable
assembly (black)
Length: 17.8 cm (7 in.)
* Not shown black M3X12MM stainless steel socket head cap screw
(Keithley Instruments part number M3X12MMSSSOHCBLK)
8
Part number
CA-532 1
CA-534-24 2
CS-751 2
CS-737 1
CA-535-7 1
Qty
2 PA-1085 Rev. A / September 2012
Quick Start Guide Model 4210-MMPC-W
Model 4200-SCS instrument connections
WARNING
To prevent injury or death due to electric shock, remove all power from the Model 4200-SCS
and shut down the Wentworth prober before installing the prober cable kit.
Connect the Model 4200-SCS instruments to the female triaxial connectors located on the prober bulkhead (se e
Figure 2 for an example).
Figure 2. T
ypical prober bulkhead triaxial connectors
1
2
Item Description
1 Female triaxial connectors
2 Bulkhead
I-V testing
For I-V testing, connect the triaxial cables of your Model 4200-SCS source-measure units (SMUs) to the standard
female triaxial connectors on the bulkhead. Figure 3 shows the prober connectio
SMU or Model 4210-SMU).
ns for two SMUs (Model 4200-
NOTE
Figure 3 shows connections to SMUs that do not use preamps. These SMUs use the supplied triaxial
cables that are terminated with a miniature triaxial connector on one end and a standard triaxial
connector on the other end. If your SMUs are equipped with preamps, use the supplied cables that
PA-1085 Rev. A / September 2012 3
are terminated with standard triaxial connectors on both ends. Figure 3 shows both cables.
Model 4210-MMPC-W Quick Start Guide
Figure 3: Model 4200-SCS SMU connections to the prober
4200-SCS
SMU-1
SMU-2
SMUs with preamps not installed (as shown):
SMUs with preamps installed:
SENSE
FORCE
SENSE
FORCE
SMU connections to prober bulkhead
Triaxial cable
Triaxial cable
Wentworth prober
bulkhead
Female
triaxial
connectors
Miniature triaxial
connector (male)
Standard triaxial
connector (male)
C-V testing
Two prober cable kits include the cable adapters needed to connect the subm iniature version A (SMA) cables of
the Model 4210-CVU to the female triaxial connectors on the prober's bulkhead.
Figure 4 shows how to make the connections. Use the torque wrench (supplied with the Model 4210-CVU) to
tighten the SMA connectors to the proper specification (8 in. lb.).
Figure 4: Model 4210-CVU prober connections
4200-SCS
4210-CVU
Use supplied torque
wrench to tighten
SMA connections
to 8 in. lb.
HCUR
Wentworth prober
bulkhead
HPOT
LPOT
LCUR
A
A = SMA cable (male to male) supplied with
4200-CVU)
B = SMA female to BNC male (CS-1247)
C = BNC female to triaxial male (CS-712)
C
B
Female
triaxial
connectors
4 PA-1085 Rev. A / September 2012
Quick Start Guide Model 4210-MMPC-W
Prober bulkhead to prober pin connections (basic setup)
Figure 5 shows the basic cable setup for the 2-pin I-V and 2-pin C-V testing scenarios described in this guide. The
4-pin I-V and 4-pin C-V testing scenarios require minor setup changes; pulse I-V setup, which is more compl ex, is
described later in this quick start guide.
NOTE
The two-pin setup illustrated below requires two Model 4210-MMPC-W kits.
Figure 5: Basic 2-pin prober cable setup
6
5
4
Item Description Part number Quantity Notes
1 Prober cable
assembly
2 Ground jumper cable
assembly
3 Triaxial female to
triaxial female, high
voltage adapter
4 Prober bulkhead (for
triaxial connectors)
5 Triaxial connectors N.A. 4 Prober bulkhead triaxial connectors
6 Triaxial to triaxial
cable
3
CA-532 2
CA-535-7 2 The jumpers connect the commons
CS-751 4
N.A. 1
CA-534-24 4
1
2
of the two cable assemblies.
1
2*
PA-1085 Rev. A / September 2012 5
Model 4210-MMPC-W Quick Start Guide
Installation guidelines
Figure 6 shows the prober cable assemblies of two Model 4210-MMPC-W kits installed in a Wentworth prober.
Each blue triaxial cable (CA-587) is secured to the manipulator mounting bracket by one mounting screw (see item
1, Figure 6 for location).
Figure 6: T
wo prober cable kits installed in a Wentworth prober
2
1
3
4
View of cable assembly
underneath manipulator
Guidelines:
• Secure each prober cable assembly to a manipulator using a single mounting screw (1, Figure 6 show s
the locatio
• As shown in Figure 6, route the blue cables (2) along the side
n of the mounting screw). Firmly tighten the cable assemblies to the manipulators.
s of the manipulators.
• Connect a black jumper (3) from one cable assembly to the other. This jumper connects the commons
of the two cable assemblies together. The jumper plugs into the ends of the assembly blocks (4). It is
good practice to install the second jumper. It improves the connection and is a good place to store the
extra jumper (second jumper not shown in Figure 6).
NOTE
Figure 6 shows an example of good routing for the ground jumper wires. When routing the wires,
consider the possible movements of the manipulators, as well as the movements of the camera or
microscope.
6 PA-1085 Rev. A / September 2012
Quick Start Guide Model 4210-MMPC-W
Figure 7: Side view of the installed prober cable assemblies
6
1
2
45
To properly attach the cable:
1. Connect the cable wires of the cable assemblies (1) to the APT probe tips (2), as shown in Figure 7.
2.
When routing the wires, consider the possible movements of the manipulators and the microscope. Figure
6 sho
ws an example of good routing for the jumper and cable wires.
3. For each pin, connect the triaxial cable assemblies (3) to the supplied female adapters (4).
4. Connect the triaxial cable assemblies (5) to the triaxial connectors on the bulkhead panel (6).
3
Usage scenarios
I-V testing: 2-pin I-V setup
To perform 2-pin I-V testing, connect two Model 4200-SMUs or Model 4210-SMUs to the prober bulkhead and then
use the setup shown in Figure 8 as a guide to connect to the device under test (DUT). Figure 2 shows typical
triaxial SMU con
nections to the outside of the bulkhead.
NOTE
The setup for 2-pin I-V testing requires two prober cable kits.
PA-1085 Rev. A / September 2012 7
Model 4210-MMPC-W Quick Start Guide
Figure 8: Test setup for 2-pin I-V testing
SMU-1
SMU-2
DUT
1
2
1
2*
6
5
4
SMU-1
3
Force
Sense
Signal path
Force
SMU-2
Sense
Item Description Part number Quantity Notes
1 Prober cable
assembly
2 Ground jumper cable
assembly
3 Triaxial female to
triaxial female, high
voltage adapter
4 Prober bulkhead (for
triaxial connectors)
5 Triaxial connectors N.A. 4 Prober bulkhead triaxial connectors
6 Triaxial to triaxial
cable
CA-532 2
CA-535-7 2 The jumpers connect the commons
of the two cable assemblies.
CS-751 4
N.A. 1
CA-534-24 4
I-V testing: 4-pin I-V setup
With four Model 4200-SMUs connected to the prober bulkhead, use the setup shown in Figure 9 to perform 4-pin
I-V testing. Figure 3 shows two SMUs connected to one of the bulkhead
connection panels. Connect two additional
SMUs to the other bulkhead connection panel.
NOTE
The setup for 4-pin I-V testing requires four prober cable kits.
8 PA-1085 Rev. A / September 2012
Quick Start Guide Model 4210-MMPC-W
Figure 9: Test setup for 4-pin I-V testing
SMU
SMU
SMU
SMU
DUT
Signal path
SMU
SMU
4-terminal
DUT
Jumper*
1 of 4
The four jumpers connect the
*
commons of the four cable
assemblies.
SMU
SMU
C-V testing: 2-pin C-V setup
NOTE
The setup for 2-pin C-V testing requires two prober cable kits.
With a Model 4210-CVU connected to the prober bulkhead, use the fundamental setup shown in Figure 10 to
perform 2-pin C-V testing. Figure 4 shows the CVU connections to
Figure 10: Test setup for 2-pin C-V testing
Triaxial to triaxial cables
(CA-534-24)
Prober cable assembly
the outside of the bulkhead.
(CA-532)
HI Cur
HI Pot
Connect to
Connect to prober
bulkhead triaxial
connectors
LO Pot
LO Cur
HI Cur
HI Pot
Model
4210-CVU
LO Pot
LO Cur
Triaxial female to triaxial
female adapters
(SC-751)
Signal path
DUT
Jumpers*
(CA-535-7)
The jumpers connect the commons of
*
the two cable assemblies.
prober pin
DUT
PA-1085 Rev. A / September 2012 9
Model 4210-MMPC-W Quick Start Guide
C-V testing: 4-pin C-V setup
NOTE
The setup for 4-pin C-V testing requires four prober cable kits.
A typical test for a field effect transistor (FET) is to connect the drain, bulk, and source together and perform the
measurement across the gate. With a Model 4210-CVU connected to the prober bulkhead, use the setup shown in
Figure 11 to perform 4-pin C-V testing.
: Test setup for 4-pin C-V testing
Gate
Drain
4-terminal
DUT
Source
Bulk
L-Pot
L-Cur
*
Jumper*
1 of 4
The four jumpers connect the commons
of the four cable assemblies.
H-Pot
H-Pot
H-Cur
4-terminal
DUT
Drain
Bulk
Source
Signal path
Figure 11
Gate
Setup using the Keithley Model 4225-PMU for pulse I-V measurements
L-Pot
L-Cur
H-Cur
NOTE
The setup for four-pin pulse I-V testing requires four prober cable kits.
The Model 4225-PMU is an Ultra Fast I-V Module that is an instrument card for the Model 4200-SCS. The PMU has
two channels of voltage pulse source with integrated simultaneous voltage and current measurement.
Figure 12 shows the cable and adapters needed to connect a PMU cha
shows a typical prober connection setup for testing a four-pin device.
Figure 12: Cable and adapters used to connect PMU channel to prober bulkhead
Model
4225-PMU
channel
A
A = 2 m SMA cable (male to male)
(supplied with Model 4225-PMU)
B = SMA female to BNC male
(CS-1247)
C = BNC female to triax male
(CS-712)
Prober
B
C
10 PA-1085 Rev. A / September 2012
nnel to the prober bulkhead, and Figure 13
Use the supplied torque
wrench to tighten the SMA
connections to 8 in. lb.
Quick Start Guide Model 4210-MMPC-W
Figure 13: Basic four-pin prober setup for PMU
To bulkhead, then connected to
Model 4225-PMU channel 1
B
A
C
E*
C
D
Drain
Gate
4-terminal
DUT
Source
D
NOTE This four-pin setup requires four
Bulk
Model 4210-MMPC-S kits.
(CA-535-7)
To bulkhead, then connected to
Model 4225-PMU channel 2
D
Jumper**
1 of 4
D
C
E*
C
B
A
A = Triaxial tee (CS-737)
B = 24” triaxial to triaxial 100 W cable (CA-534-24)
C = Triaxial female to triax female adapter (CS-751)
D = MMPC prober cable assembly (CA-532)
E = Triaxial shorting plug* (CS-1546)
The triaxial shorting plug (H) connects the
*
center conductor of the triaxial cable to
the outer shield.
to pulse generator low.
The four jumpers connect the commons of the
**
four cable assemblies.
This connects DUT LO
Setup using the Keithley Model 4225-RPM for I-V, C-V, or pulse I-V measurements
NOTE
The setup for three-pin pulse I-V testing requires three prober cable kits. The setups for four-pin
testing require four prober cable kits.
The Model 4225-RPM is a Remote Amplifier/Switch that is an optional item to the Model 4225-PMU. The PMU has
two channels, so each PMU instrument card supports two (2) RPMs. The MMPC cables simplify the conne ction
and re-connection between the instruments and the device under test. The combination of the MMPC cables with
the RPM permits testing I-V, C-V, or pulse I-V automatically, without any manual cable re-connections. When using
only two RPMs on a four-terminal device, some re-cabling is required for certain C-V test configurations.
The Model 4225-RPM has the appropriate connector types at the input and output of the RPM enclosure to
eliminate any adapters when connecting cables to the RPM. On the input side, there are two triaxial connectors for
SMU Force and SMU Sense. There are two SMA connectors for CVU POT and CVU CUR. There is also an RPM
control connector for the control and power of the RPM from the Model 4225-PMU. The output of the RPM is a pair
of triaxial cables (Force and Sense), which connect directly to the MMPC cables as shown in the figures below.
See Section 16 of the 4200 Reference Manual for Model 4225-PMU and Model 4225-RPM information and how to
configure an ITM for a pulse IV test.
PA-1085 Rev. A / September 2012 11
Model 4210-MMPC-W Quick Start Guide
2 Channel I-V or Pulse I-V Setup
For most I-V and pulse I-V testing, only two source/measure channels are typically used. The two active signals are
connected to the gate and drain, and the source (and bulk, if present) is connected to ground (see Figure 14 and
Figure 15). For the C-V test setup shown in Figure 16, all four source/measure channels are used.
Figure 14
To SMU1
To CVU HI
To Model 4225-PMU 1,
RPM channel 1
Bulkhead pass-through
for RPM cables
To SMU2
To CVU LO
To Model 4225-PMU 1,
RPM channel 2
: Test setup for three-pin device using two-channel I-V and Pulse I-V
MMPC prober cable assembly
A =
Wentworth prober
bulkhead
Model
4225-RPM 1
SMU Sense
SMU Force
CVU HI Pot
CVU HI Cur
RPM Control
Model
4225-RPM 2
SMU Sense
SMU Force
CVU LO Pot
CVU LO Cur
RPM Control
Black triaxial SMU cables
Red SMA CVU cables (CA-447)
White RPM control cable
(CA-547-2)
Sense
Force
Ground Jumper*
1 of 2
(CA-535-7)
Sense
A
Force
(CA-532)
Triaxial female to triaxial female
B =
adapter (CS-751)
Triaxial shorting plug** (CS-1546)
C =
NOTE This three-pin setup requires three
Model 4210-MMPC-W kits.
A
Drain
Gate
Source
A
The two jumpers connect the
*
commons of the three cable
assemblies.
The triaxial shorting plug (C)
**
connects the center conductor
of the triaxial cable to the outer
shield. This connects DUT LO
to pulse generator low.
B
C**
12 PA-1085 Rev. A / September 2012
Quick Start Guide Model 4210-MMPC-W
Figure 15: Test setup for four-pin device using two-channel I-V and Pulse I-V
MMPC prober cable assembly
A =
(CA-532)
Triaxial female to triaxial female
B =
adapter (CS-751)
Triaxial shorting plug** (CS-1546)
C =
NOTE This three-pin setup requires three
Model 4210-MMPC-W kits.
A
The two jumpers connect the
*
Drain
Gate
commons of the three cable
assemblies.
The triaxial shorting plug (C)
**
connects the center conductor
Source
of the triaxial cable to the outer
shield. This connects DUT LO
to pulse generator low.
A
To SMU1
To CVU HI
To Model 4225-PMU 1,
RPM channel 1
Bulkhead pass-through
for RPM cables
To SMU2
To CVU LO
To Model 4225-PMU 1,
RPM channel 2
Wentworth prober
bulkhead
Model
4225-RPM 1
SMU Sense
SMU Force
CVU HI Pot
CVU HI Cur
RPM Control
Model
4225-RPM 2
SMU Sense
SMU Force
CVU LO Pot
CVU LO Cur
RPM Control
Black triaxial SMU cables
Red SMA CVU cables (CA-447)
White RPM control cable
(CA-547-2)
Sense
Force
Ground Jumper*
1 of 2
(CA-535-7)
Sense
A
Force
B
C**
PA-1085 Rev. A / September 2012 13
Model 4210-MMPC-W Quick Start Guide
Figure 16: Test setup for four-terminal C-V testing
MMPC prober cable assembly
A =
(CA-532)
Triaxial female to triaxial female
B =
adapter (CS-751)
Ground jumper* (CS-535-7)
C =
NOTE This four-pin setup requires four
Model 4210-MMPC-W kits.
A
C
Drain
Gate
C
The three jumpers (C) connect
*
the commons of the four cable
assemblies.
C
Bulk
Source
A
B
A
B
To SMU1
To CVU HI
To Model 4225-PMU 1,
RPM channel 1
Bulkhead pass-through
for RPM cables
To SMU2
To CVU LO
To Model 4225-PMU 1,
RPM channel 2
Wentworth prober
bulkhead
Model
4225-RPM 1
SMU Sense
4225-RPM 2
SMU Force
CVU HI Pot
CVU HI Cur
RPM Control
Model
4225-RPM 2
SMU Sense
SMU Force
CVU LO Pot
CVU LO Cur
RPM Control
Black triaxial SMU cables
Red SMA CVU cables (CA-447)
White RPM control cable
(CA-547-2)
Sense
Force
Sense
Force
A
14 PA-1085 Rev. A / September 2012
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 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 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.
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 switching cards, or making internal 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.
The instrument and accessories must be used in accordance with its specifications and operating instructi ons, or the safety of
the equipment may be impaired.
09/12
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 agains t 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 screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.
!
The symbol on an instrument means caution, risk of danger. The user should refer to the operating instructions located in
the user documentation in all cases where the symbol is marked on the instrument.
The symbol 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 symbol indicates a connection terminal to the equipment frame.
Hg
If this 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 federal, state, and local laws.
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 pr ocedure.
The CAUTION 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.
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-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 Keithley Instruments to maintain accuracy and functionality of the product). If yo u are unsure about the
applicability of a replacement component, call a Keithley Instruments office for information.
To clean an instrument, use a damp cloth or mild, water-based cleaner. Clean the exterior of the instrument only. Do n ot app ly
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.
09/12
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