Keithley 6220 DC User manual

www.keithley.com
ECNEDIFNOCFOERUSAEMRETAERGA
www.keithley.com
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Model 6220 DC Current Source
Model 6221 AC and DC Current Source
Users Manual
622x-900-01 Rev. C / October 2008
Model 6220 DC Current Source
Model 6221 AC and DC Current Source
Users Manual
622x-900-01 Rev. C / October 2008

WARRANTY
Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship
for a period of one (1) year from date of shipment.
Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment:
probes, cables, software, rechargeable batteries, diskettes, and documentation.
During the warranty period, Keithley Instruments will, at its option, either repair or replace any product that
proves to be defective.
To exercise this warranty, write or call your local Keithley Instruments representative, or contact
Keithley Instruments headquarters in Cleveland, Ohio. You will be given prompt assistance and
return instructions. Send the product, transportation prepaid, to the indicated service facility. Repairs
will be made and the product returned, transportation prepaid. Repaired or replaced products are
warranted for the balance of the original warranty period, or at least 90 days.
LIMITATION OF WARRANTY
This warranty does not apply to defects resulting from product modification without Keithley
Instruments’ express written consent, or misuse of any product or part. This warranty also does not
apply to fuses, software, non-rechargeable batteries, damage from battery leakage, or problems
arising from normal wear or failure to follow instructions.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED,
INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR USE. THE REMEDIES PROVIDED HEREIN ARE THE BUYER’S SOLE AND
EXCLUSIVE REMEDIES.
NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE
FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF ITS INSTRUMENTS AND SOFTWARE, EVEN IF KEITHLEY
INSTRUMENTS, INC. HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH
DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED TO: COST
OF REMOVAL AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY
PERSON, OR DAMAGE TO PROPERTY.
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Keithley Instruments, Inc.
Corporate Headquarters • 28775 Aurora Road • Cleveland, Ohio 44139
440-248-0400 • Fax: [phone] • 1-888-KEITHLEY (1-888-534-8453) • www.keithley.com 3/07

Model 6220 DC Current Source
Model 6221 AC and DC Current Source
User’s Manual
©2004, Keithley Instruments, Inc.
All rights reserved.
Cleveland, Ohio, U.S.A.
Third Printing, October 2008
Document Number: 622x-900-01 Rev. C

Safety Precautions
11/07
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 non-hazardous 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 over-voltages. Measurement Category II
connections require protection for high transient over-voltages 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 30V RMS, 42.4V peak, or 60VDC 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 volts, 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, make sure 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 specifications and operating instructions, or the
safety of the equipment may 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 safety earth 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 safety earth ground using the wire recommended in the user documentation.
The symbol on an instrument indicates that the user should refer to the operating instructions located in the
documentation.
The symbol on an instrument shows that it can source or measure 1000 volts or more, including the combined
effect of normal and common mode voltages. 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.
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 procedure.
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 you 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
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., 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.
!

Table of Contents
1 Getting Started
Introduction ............................................................................................................. 1-2
User’s Manual content and structure ............................................................... 1-2
Capabilities and features .................................................................................. 1-2
General information ................................................................................................ 1-3
Warranty information ....................................................................................... 1-3
Contact information ......................................................................................... 1-3
Safety symbols and terms ................................................................................ 1-3
Unpacking and inspection ................................................................................ 1-3
Options and accessories ................................................................................... 1-4
Front and rear panel familiarization ........................................................................ 1-4
Front panel summaries ..................................................................................... 1-4
Rear panel summaries ...................................................................................... 1-8
Heat sink and cooling vents .................................................................................... 1-9
Power-up ............................................................................................................... 1-11
Line power connection ................................................................................... 1-11
Source preset .................................................................................................. 1-12
Disabling the front panel ................................................................................ 1-12
Menus .................................................................................................................... 1-13
CONFIG menus ............................................................................................. 1-13
Direct access menus ....................................................................................... 1-13
Editing controls ..................................................................................................... 1-14
Source and compliance editing ...................................................................... 1-14
Menu navigation ............................................................................................ 1-14
Password ............................................................................................................... 1-16
Remote interface ................................................................................................... 1-17
Error and status messages ..................................................................................... 1-17
Default settings ..................................................................................................... 1-18
Save and restore setups .................................................................................. 1-18
Select power-on setup .................................................................................... 1-19
SCPI programming ............................................................................................... 1-19
Optional command words .............................................................................. 1-19
Query commands ........................................................................................... 1-19

2 Output Connections
Output connectors ................................................................................................... 2-2
Triax connector ................................................................................................ 2-2
Ground points .................................................................................................. 2-3
LO and GUARD banana jacks ........................................................................ 2-3
INTERLOCK .................................................................................................. 2-4
Output configurations ............................................................................................. 2-5
Triax inner shield ............................................................................................. 2-6
Triax output low .............................................................................................. 2-7
Guards ..................................................................................................................... 2-8
Triax Cable Guard .......................................................................................... 2-8
Floating the current source ..................................................................................... 2-9
Connections to DUT ............................................................................................... 2-9
Supplied triax cable ......................................................................................... 2-9
Basic connections .......................................................................................... 2-10
Shields and guarding ..................................................................................... 2-10
Using a test fixture ................................................................................................ 2-12
3 DC Current Source Operation
Current source output capabilities .......................................................................... 3-2
Source ranges .................................................................................................. 3-2
Compliance ...................................................................................................... 3-3
Output power (source or sink) ......................................................................... 3-3
Output response .............................................................................................. 3-5
Setting source and compliance ............................................................................... 3-8
Source and compliance editing ....................................................................... 3-8
Autorange ....................................................................................................... 3-11
Source preset ................................................................................................. 3-12
Sourcing current ................................................................................................... 3-12
Remote programming – source output commands ........................................ 3-15
Applications .......................................................................................................... 3-16
4Sweeps
Sweep overview ...................................................................................................... 4-2
Linear staircase sweep ..................................................................................... 4-2
Logarithmic staircase sweep ........................................................................... 4-2
Custom sweep ................................................................................................. 4-2
Sweep characteristics .............................................................................................. 4-4
Custom sweep editing ..................................................................................... 4-4
Using auto-copy with custom sweeps ............................................................. 4-4
Source ranging ................................................................................................. 4-4
Sweep delay ..................................................................................................... 4-5

Front panel sweep operation ................................................................................... 4-5
Using the sweep configuration menu ............................................................... 4-5
Performing a staircase sweep ........................................................................... 4-6
Performing a custom sweep ............................................................................. 4-7
Remote sweep operation ......................................................................................... 4-8
Running a staircase sweep ............................................................................... 4-9
Running a custom sweep ............................................................................... 4-10
SCPI commands — sweeps ........................................................................... 4-11
5 Delta, Pulse Delta, and Differential Conductance
Operation overview ................................................................................................. 5-2
Test systems ............................................................................................................ 5-4
Keithley instrumentation requirements ............................................................ 5-4
System configurations ...................................................................................... 5-4
System connections .......................................................................................... 5-5
DUT test connections ....................................................................................... 5-8
Configuring communications .......................................................................... 5-9
Triggering sequence ....................................................................................... 5-10
Readings ................................................................................................................ 5-11
Display readings ............................................................................................ 5-11
Measurement units ......................................................................................... 5-11
Read commands ............................................................................................. 5-13
Delta ...................................................................................................................... 5-13
Model 622x measurement process ................................................................. 5-13
Configuration settings .................................................................................... 5-15
Operation ....................................................................................................... 5-16
Setup and arm commands .............................................................................. 5-19
Pulse Delta ............................................................................................................ 5-21
Model 6221 measurement process ................................................................. 5-21
Pulse Delta outputs ........................................................................................ 5-22
Configuration settings .................................................................................... 5-26
Operation ....................................................................................................... 5-29
Setup commands ............................................................................................ 5-32
Differential Conductance ...................................................................................... 5-34
Model 622x measurement process ................................................................. 5-34
Configuration settings .................................................................................... 5-37
Operation ....................................................................................................... 5-38
Setup and arm commands .............................................................................. 5-41

6 Averaging Filter, Math, and Buffer
Averaging filter ....................................................................................................... 6-2
Averaging filter characteristics ........................................................................ 6-2
Filter setup and control .................................................................................... 6-4
Remote programming – Averaging filter ........................................................ 6-4
Math ........................................................................................................................ 6-5
mX+b and m/X+b (reciprocal) ........................................................................ 6-5
Configuring mX+b and m/X+b ....................................................................... 6-6
Remote programming – Math ......................................................................... 6-6
Buffer ...................................................................................................................... 6-7
Buffer characteristics ....................................................................................... 6-7
Storing readings ............................................................................................... 6-8
Recall ............................................................................................................... 6-8
7 Wave Functions (6221 Only)
Wave function overview ......................................................................................... 7-2
Setting waveform parameters .......................................................................... 7-3
Ranging ........................................................................................................... 7-3
Frequency ........................................................................................................ 7-4
Offset ............................................................................................................... 7-4
Duty cycle ....................................................................................................... 7-5
Phase marker ................................................................................................... 7-6
Duration ........................................................................................................... 7-7
Externally triggered waveforms ...................................................................... 7-7
Front panel wave function operation ...................................................................... 7-8
Using the wave function menu ........................................................................ 7-8
Generating a sine wave ................................................................................. 7-10
Generating an arbitrary waveform ................................................................. 7-11
Remote wave function operation .......................................................................... 7-12
Programming sine waves .............................................................................. 7-13
Programming arbitrary waveforms ............................................................... 7-14
SCPI commands — wave functions .............................................................. 7-15
A Specifications
B SCPI Tables (Abridged)

List of Illustrations
1 Getting Started
Figure 1-1 Models 6220 and 6621 front panels .................................................................... 1-5
Figure 1-2 Model 622x rear panel ........................................................................................ 1-8
Figure 1-3 Menu editing keys ............................................................................................. 1-14
2 Output Connections
Figure 2-1 Triax connector and grounds points .................................................................... 2-2
Figure 2-2 LO and GUARD banana jacks ........................................................................... 2-3
Figure 2-3 INTERLOCK ...................................................................................................... 2-4
Figure 2-4 Output configurations – triax inner shield connected to Output Low ................ 2-5
Figure 2-5 Output configurations – triax inner shield connected to Cable Guard ............... 2-6
Figure 2-6 Basic connections to DUT ................................................................................ 2-10
Figure 2-7 Noise shield ...................................................................................................... 2-10
Figure 2-8 Safety shield ...................................................................................................... 2-11
Figure 2-9 Cable Guard connections – triax inner shield connected to Cable Guard ........ 2-11
Figure 2-10 Connections for noise shield, safety shield, and guarding ................................ 2-12
3 DC Current Source Operation
Figure 3-1 Output boundaries (source and sink) .................................................................. 3-5
Figure 3-2 Source and compliance editing – Model 6220 ................................................... 3-8
Figure 3-3 Source and compliance editing – Model 6221 ................................................. 3-10
4Sweeps
Figure 4-1 Comparison of sweep types ................................................................................ 4-3
5 Delta, Pulse Delta, and Differential Conductance
Figure 5-1 Delta, Pulse Delta, and Differential Conductance measurements ...................... 5-3
Figure 5-2 System configurations for Delta, Pulse Delta, and Differential Conductance .... 5-5
Figure 5-3 System connections – stand-alone operation ...................................................... 5-6
Figure 5-4 System connections – PC control of Model 622x .............................................. 5-7
Figure 5-5 Guarded test connections .................................................................................... 5-8
Figure 5-6 Delta measurement technique ........................................................................... 5-14
Figure 5-7 Pulse Delta 3-point measurement technique ..................................................... 5-21
Figure 5-8 Pulse timing ...................................................................................................... 5-24
Figure 5-9 Pulse sweep output examples ........................................................................... 5-25
Figure 5-10 Differential Conductance measurement process ............................................... 5-35
6 Averaging Filter, Math, and Buffer
Figure 6-1 Buffer recall ........................................................................................................ 6-9

7 Wave Functions (6221 Only)
Figure 7-1 Offset example ................................................................................................... 7-4
Figure 7-2 Duty cycle .......................................................................................................... 7-5
Figure 7-3 Phase marker ...................................................................................................... 7-6

List of Tables
3 DC Current Source Operation
Table 3-1 Source ranges and maximum outputs ................................................................. 3-2
Table 3-2 DC output commands ....................................................................................... 3-15
4Sweeps
Table 4-1 Sweep configuration menu ................................................................................. 4-5
Table 4-2 Sweep example parameters ................................................................................. 4-8
Table 4-3 Staircase sweep commands (linear and logarithmic) ........................................ 4-11
Table 4-4 Custom (list) sweep commands ........................................................................ 4-12
5 Delta, Pulse Delta, and Differential Conductance
Table 5-1 Measurement unit commands ........................................................................... 5-12
Table 5-2 Delta commands ............................................................................................... 5-20
Table 5-3 Pulse Delta commands ...................................................................................... 5-33
Table 5-4 Differential Conductance commands ................................................................ 5-42
6 Averaging Filter, Math, and Buffer
Table 6-1 Average filter types ............................................................................................. 6-2
Table 6-2 Averaging filter commands ................................................................................. 6-5
Table 6-3 Math commands .................................................................................................. 6-6
Table 6-4 Buffer commands ................................................................................................ 6-9
7 Wave Functions (6221 Only)
Table 7-1 Wave function characteristics ............................................................................. 7-2
Table 7-2 Wave function configuration menu ..................................................................... 7-8
Table 7-3 Waveform example parameters ........................................................................ 7-12
Table 7-4 Waveform function commands ......................................................................... 7-15
B SCPI Tables (Abridged)
Table B-1 Calculate command summary ............................................................................ B-2
Table B-2 Display command summary .............................................................................. B-2
Table B-3 Format command summary ............................................................................... B-3
Table B-4 Output command summary ................................................................................ B-3
Table B-5 Sense command summary ................................................................................. B-3
Table B-6 Source command summary ................................................................................ B-4
Table B-7 Status command summary ................................................................................. B-7
Table B-8 System command summary ............................................................................... B-8
Table B-9 Trace command summary .................................................................................. B-9
Table B-10 Trigger command summary ............................................................................. B-10
Table B-11 Units command summary ................................................................................ B-10

1
Getting Started
Section 1 topics
Introduction, page 1-2 Menus, page 1-13
User’s Manual content and structure, page 1-2 CONFIG menus, page 1-13
Capabilities and features, page 1-2 Direct access menus, page 1-13
General information, page 1-3 Editing controls, page 1-14
Warranty information, page 1-3 Source and compliance editing, page 1-14
Contact information, page 1-3 Menu navigation, page 1-14
Safety symbols and terms, page 1-3
Unpacking and inspection, page 1-3 Password, page 1-16
Options and accessories, page 1-4 Remote interface, page 1-17
Front and rear panel familiarization, page 1-4
Front panel summaries, page 1-4 Error and status messages, page 1-17
Rear panel summaries, page 1-8 Default settings, page 1-17
Heat sink and cooling vents, page 1-9 Save and restore setups, page 1-18
Select power-on setup, page 1-18
Power-up, page 1-11
Line power connection, page 1-11 SCPI programming, page 1-17
Source preset, page 1-12 Optional command words, page 1-19
Disabling the front panel, page 1-12 Query commands, page 1-19
NOTE The information in this section is an abbreviated version of
the information in Section 1 of the Reference Manual. Refer to
Section 1 of the Reference Manual for complete details and
additional information that is not provided in this manual.

1-2 Getting Started Model 6220/6221 User’s Manual
Return to Section 1 topics
Introduction
User’s Manual content and structure
This User’s Manual is provided as a hardcopy and is also provided on the sup-
plied Product Information CD in PDF format. The User’s Manual is an abbreviated
version of the operation sections of the Reference Manual. The seven sections of
the User’s Manual correspond (in abbreviated form) to the first seven sections of
the Reference Manual.
The Reference Manual is on the Product Information CD in PDF format. Refer to
the Reference Manual for complete information.
Capabilities and features
• Source ±DC current from 0.1pA to 105mA.
• Voltage compliance limit from 0.1V to 105V in 10mV steps.
• 11W, four-quadrant sink or source operation (duty cycle limitation for high
power sink).
• Analog filter to slow down output response.
• Triax cable guarding to optimize output response speed and reduce leak-
age currents in high impedance test circuits.
• Banana jack guard output for voltage measurements.
• Sweep functions: linear staircase, logarithmic staircase, and custom.
• Waveform functions (6221 only): Sine, square, ramp, and arbitrary function
generator.
• Five user-saved setups.
• Delta testing when used with the Keithley Model 2182 or 2182A:
•Delta – Uses a square wave output and a 3-point measurement algo-
rithm to cancel the effects of thermal EMFs.
•Pulse Delta (6221 and 2182A only) – Provides a pulse output and a
3-point (or 2-point) measurement algorithm for testing of temperature
sensitive Device Under Test (DUT).
•Differential Conductance – Uses a differential current output and a
3-point moving average algorithm to perform differential measure-
ments.
• Buffer storage and recall for up to 65,536 delta readings
• Averaging filtering for delta readings
• Supported remote interfaces: Model 6220: GPIB and RS-232.
Model 6221: GPIB, RS-232, and Ethernet.
• KI-220 language – DDC commands to emulate Model 220 operation.

Model 6220/6221 User’s Manual Getting Started 1-3
Return to Section 1 topics
General information
Warranty information
Warranty information is located at the front of this manual. Should your Model
622x require warranty service, contact the Keithley representative or authorized
repair facility in your area for further information. When returning the instrument
for repair, be sure to fill out and include the service form at the back of this manual
to provide the repair facility with the necessary information.
Contact information
Worldwide phone numbers are listed at the front of this manual. If you have any
questions, please contact your local Keithley representative or call one of our
Application Engineers at 888-Keithley (534-8453) or 800-552-1115 (U.S. and
Canada only). You can also contact Applications Engineering online at
www.keithley.com.
Safety symbols and terms
The following symbols and terms may be found on the instrument or used in this
manual:
If a screw is present, connect it to safety earth ground using the wire recom-
mended in the user documentation.
The symbol on an instrument indicates that the user should refer to the oper-
ating instructions located in the manual.
The symbol on an instrument shows that it can source or measure 1000 volts
or more, including the combined effect of normal and common mode voltages.
Use standard safety precautions to avoid personal contact with these voltages.
The symbol indicates a connection terminal to the equipment frame.
The WARNING heading used in this manual 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 used in this manual explains hazards that could damage
the instrument. Such damage may invalidate the warranty.
Unpacking and inspection
Inspection for damage
The Model 622x was carefully inspected electrically and mechanically before ship-
ment. After unpacking all items from the shipping carton, check for any obvious
signs of physical damage that may have occurred during transit. (There may be a
protective film over the display lens, which can be removed.) Report any damage
!

1-4 Getting Started Model 6220/6221 User’s Manual
Return to Section 1 topics
to the shipping agent immediately. Save the original packing carton for possible
future shipment. Before removing the Model 622x from the bag, observe the fol-
lowing handling precautions.
Handling precautions
• Always grasp the Model 622x by the covers.
• After removing the Model 622x from its anti-static bag, inspect it for any
obvious signs of physical damage. Report any such damage to the ship-
ping agent immediately.
• When the Model 622x is not installed and connected, keep the unit in its
anti-static bag and store it in the original packing carton.
Package content
The following items are included with every Model 622x order:
• Model 622x current source with line cord.
• Protective triax Shield/Cap (CAP-28-1).
• 237-ALG-2 Triax cable terminated with alligator clips on one end.
• Model 8501 Trigger Link cable.
• CA-351 null-modem serial cable.
• CA-180-3A Ethernet cross-over cable (Model 6221 only).
• Accessories as ordered.
• Certificate of calibration.
• Model 622x User’s Manual (P/N 622x-900-00).
• Product Information CD-ROM that contains PDFs of the User’s and Refer-
ence Manuals.
Options and accessories
The various options and accessories that are available from Keithley for the Model
622x are listed and explained in Section 1of the Reference Manual.
Front and rear panel familiarization
Front panel summaries
The front panels of the Models 6220 and 6221 are shown in Figure 1-1. The
descriptions of the front panel controls follow Figure 1-1.
Many of the keys that are used to select a function or operation are also used for
configuration by first pressing the CONFIG key. For example, to configure a
sweep, press CONFIG and then SWP.