Tektronix 8006 Instruction Manual

Model 8006 Component Test Fixture

Instruction Manual

A GREATER MEASURE OF CONFIDENCE

WARRANTY

Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1 year
from date of shipment.

Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable
batteries, diskettes, and documentation.

During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.

To exercise this warranty, write or call your local Keithley representative, or contact Keithley 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’s 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 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: COSTS OF REMOVAL AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY
PERSON, OR DAMAGE TO PROPERTY.

Keithley Instruments, Inc. 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: [phone]

1-888-KEITHLEY (534-8453) • www.keithley.com

Sales Offices:BELGIUM: Bergensesteenweg 709 • B-1600 Sint-Pieters-Leeuw • 02-363 00 40 • Fax: [phone]

CHINA: Yuan Chen Xin Building, Room 705 • 12 Yumin Road, Dewai, Madian • Beijing 100029 • 8610-6202-2886 • Fax: [phone]
FINLAND: Tietäjäntie 2 • 02130 Espoo • Phone: [phone] • Fax: [phone]
FRANCE: 3, allée des Garays • 91127 Palaiseau Cédex • 01-64 53 20 20 • Fax: [phone]
GERMANY: Landsberger Strasse 65 • 82110 Germering • 089/84 93 07-40 • Fax: [phone]
GREAT BRITAIN: Unit 2 Commerce Park, Brunel Road • Theale • Berkshire RG7 4AB • 0118 929 7500 • Fax: [phone]
INDIA: Flat 2B, Willocrissa • 14, Rest House Crescent • Bangalore 560 001 • 91-80-509-1320/21 • Fax: [phone]
ITALY: Viale San Gimignano, 38 • 20146 Milano • 02-48 39 16 01 • Fax: [phone]
JAPAN: New Pier Takeshiba North Tower 13F • 11-1, Kaigan 1-chome • Minato-ku, Tokyo 105-0022 • 81-3-5733-7555 • Fax: [phone]
KOREA: 2FL., URI Building • 2-14 Yangjae-Dong • Seocho-Gu, Seoul 137-888 • 82-2-574-7778 • Fax: [phone]
NETHERLANDS: Postbus 559 • 4200 AN Gorinchem • 0183-635333 • Fax: [phone]
SWEDEN: c/o Regus Business Centre • Frosundaviks Allé 15, 4tr • 169 70 Solna • 08-509 04 679 • Fax: [phone]
SWITZERLAND: Kriesbachstrasse 4 • 8600 Dübendorf • 01-821 94 44 • Fax: [phone]
TAIWAN: 1FL., 85 Po Ai Street • Hsinchu, Taiwan, R.O.C. • 886-3-572-9077• Fax: [phone]

4/02

Model 8006 Component Test Fixture

Instruction Manual

All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.

Other brand and product names are trademarks or registered trademarks of their respective holders.

©1989, Keithley Instruments, Inc.

All rights reserved.
Cleveland, Ohio, U.S.A.
First Printing, June 1989

Document Number: 8006-901-01 Rev. A

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 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 manual for complete product specifications.

If the product is used in a manner not specified, the protection pro­vided by the product 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 manual. 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, and perform

safe installations and repairs of products. Only properly trained ser­vice personnel may perform installation and service procedures.

Keithley products are designed for use with electrical signals that
are rated Installation Category I and Installation Category II, as de­scribed in the International Electrotechnical Commission (IEC)
Standard IEC 60664. Most measurement, control, and data I/O sig­nals are Installation Category I and must not be directly connected
to mains voltage or to voltage sources with high transient over-volt­ages. Installation 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 Manual.

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 its
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 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.

2/02

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 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 WARNING heading in a 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 in a manual 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.

Model 8006

Component Test Fixture

DEVICE SOCKET CONFIGURATION:

‘2Omn-1 and 3Omm axial (Kelvin), 4 pin TO-W/46;
4,8,10, and 12 pinTO-5,28 pin DIP (0.100 in. pin spacing,

0.300 to 0.600 in. wide, zero insertion force, replaceable).

CONNECTOR TYPE: Three-lug triaxial (12), isolated BNC

(2), 5-way binding posts (51, safety ground terminal (l),
safety interlock (1).

MAXlMUM COMMON MODE VOLTAGE FROM CHASSIS:

Trim inner shield 1lOOV peak
BNC shell 30V rms (DC to 6OHz)
5-way binding posts

ISOLATION FROM CHASSIS: >lGO (triax inner shield, BNC

shell, 5-way binding posts).

MAXIMUM SIGNAL VOLTAGE: 1lOOV peak, signal or guard to

any signal, guard, panel shield, or module shield (except

600V peak, any signal to its own guard).
MAXIMUM SIGNAL CURRENT: 1A peak.
OFFSET CURRENT: <lOOfA.
PATH ISOLATION (using triax or BNC connectors and cables):

Resistance:

Axial and Teflon@

SO&t-S

DIP socket >lTQ (>lOOTQ typical*)

Capacitance (nominal):

Axial sockets 0.2pF
Teflon@ sockets

DIP socket

CROSSTALK @ 1MHz (typical*): -70dB (SOQ source and

measure).
3dB BANDWIDTH (typical*): 4MHz (50R source and

measure).
INSERTION LOSS @ 1MHz (typical”): 0.3dB (50R source and

1h40 measure).

SOCKET KELVIN RESISTANCE:

Axial sockets: <lOO@ (<lOpQ typical).

Teflon@ and DIP sockets: 40mO
ENVIRONMENT:

Operating: 0” to 5O”C, ~70% non-condensing RH. up to 35°C.

Storage: -25’ to +70°C.

IlOOV peak

>lOOTQ (>lO,OOOTR typical’)

IPF

3pF

GENERAL

DIP SOCKET OPERATING LIFEz >25,000 open-close cycles.
LID INTERLOCK SWITCHING: <28VDC, 50mA.
DUIIENSIONS, WEIGHT: 14Omm high x 3OOmm wide x 3OOmm

deep (5.5 in. x 12 in. x 12 in.). Net weight 3.2kg (7 lbs. 2 oz.).

ACCESSORIES SUPPLIED:

lnstmction manual
Model 236-ILC3: Interlock Cable, 3m (10 ft.)
Model 8006-MJCz Red/Black Teflon Clip Jumpers
Model 800~MJG
Model 8006~MJS-1: Red Teflon Mini Jumper (10)
Model 8006~MJS-2:
Model 8006~MJS-3: Blue Teflon Mini Jumper (10)
Model 8007-GND-3:

ACCESSORIES AVAILABLE:

Model 7078-TRX-3: Triax Cable (3-lug), 0.9m (3 ft.)
Model 7078-TRX-10:

Model 4801: Low Noise Coax Cable, 1.2m (4 ft.)
*At room ambient conditions (18” to 28’C, ~40% R.H.).
Except where noted, specifications assume: Any socket, guarded

measurement configwation, including guarded jumpers and

lm external triax cables.

Guarded Teflon Mini Jumper (8)
Black Teflon Mini Jumper (10)
Safety Ground Wire

Triax Cable (3-lug), 3m (10 ft.)

HOW TO USE THIS MANUAL

Contains information on Model 8006 features, specifica­tiom, and accessories.

Outlines test fixture connections and details how to connect
the fixture to instruments for typical device tests.

Contains performance verification and cleaning procedures for

the

test

fixture.

Lists replacement parts, and also includes component layout
and schematic drawings for the Model 8006.

SECTION 1

General Information

SECTION 2

Operation

SECTION 3

Service Information

SECTION 4

Replaceable Parts

Table Of Contents

SECTION 1

1.1

- General Information

INTRODU’XION

1.2 FEATURES

1.3

WARRANTYINFORMATION

1.4 MANUAL ADDENDA

1.5 SAFETY SYMBOLS AND TERMS

1.6 SPECIFICATIONS

1.7 UNPACKING AND INSPECTION

1.7.1 Inspection for Damage

1.7.2 shipment contents

1.7.3

1.8

1.9

Instndion Manual

REPACKING FOR SHIPMENT

ACCESSORIES

SECTION 2 - Operation

2.1

2.2

2.2.1

2.2.2

2.2.3

2.2.4

2.2.5

2.2.6

2.2.7

2.3

2.3.1

2.3.2

2.3.3

2.3.4

2.3.5

2.3.6

2.3.7

2.4

2.4.1

2.4.2

2.4.3

2.4.4

2.4.5

2.4.6

2.4.7

2.4.8

2.4.9

INTRODUCTION ...........

PANELCONFIGURATION ...

RearPanel

..............

Signal Panel ....................

Component Test Module ...........

Installing Devices in Sockets ........

Installing Jumpers

................

Panel and Module Guarding ........

Source Measure Unit Overlays

INSTRUMENTCONNECTIONS

Source Measure Unit Connections

Current Source Connections ........

Voltage Source Connections ........

Electrometer

Connections ..........

Matrix Card Connections ..........

Dh4M Connections ...............

Miscellaneous Instrument Connections

MEASLJREMENT CONSIDERATIONS

Path Isolation ...................

Keeping Connectors and Sockets Clean

shiekiiig

Guarding

......................

...............

Cable Noise Currents ......

Magnetic Fields ...........

Radio Frequency Interference

Ground Loops ...........

Kelvin Connections ........

.............................

.............................

.............................

......

......

....

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....................

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....................

....................

....................

.....................

l-l
l-l
l-l
l-l
1-l
l-2
l-2
l-2
l-2
l-2
l-2
l-2

.

2-l
2-l
2-l
24
24
2-5
2-5
2-7
2-7
2-7
2-8
2-12
2-14
2-16
2-17
2-19

.

2-19
2-20
2-20
2-z
2-23
2-24
2-25
2-26

2-26
2-26
2-27

2.4.10

2.4.11

2.4.12

2.4.13

2.4.14

2.4.15

2.5

2.5.1

2.5.2

2.5.3

2.5.4

DeviceOsciIIation

Environmental Considerations

...........................

.................

Vibration .................................

Low-Current and Low-Voltage Measurements
Cumulative Power
AC Measurements

TYPICAL APPLICATIONS

DiodeTesting
Transistor Testing

..........................

..........................

......................

..............................

...........................

.....

ICTesting .................................

Semiconductor Parameter Analysis Switching System

................

................

................

................

................

................

................

2-29
2-34
2-34
2-34
2-34
2-34
2-35
2-35
2-37
240
245

SECTION

3.1

3.2

3.2.1

3.2.2

3.2.3

3.2.4

3.2.5

3.2.6

3.3

3.3.1

3.3.2

3.4

3.4.1

3.4.2

3.5

SECTION

4.1

4.2

4.3

3 - Service Information

INTRODUCTION
PERFORMANCE VERIFICATION

EnvironmentaI Conditions
Recommended Test Equipment
Performance Record
Isolation Resistance Verification

Offset Current Verification
AC Performance

HANDLING AND CLEANING PRFCAUTIONS

Component Test Module Handling and Cleaning
Connector Cleaning

DISASSEMBLY AND ASSEMBLY

Disassembly

Reassembly .............................

INTERLOCK SWITCH CALIBRATION

..........................

.............

.................

..............

......................

.............

.................

.........................

......................

..............

............................

.........

4 - Replaceable Parts

INTRODUCTION...............................

PARTSLIST . . . . . . . . . . . . . . . . . . . . .._............

ORDERTNG INFORMATION . . . . . . . . . . . . .

4.4 FACTORY SERVICE . . . . . . . . . . . . . . . .

4.5 COMPONENT LAYOUT AND SCHEMATIC DIAGRAM .

.......................

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.......................

.......................

.......................

..............

..............

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..............

..............

. . . . . . . . . .

...........

...........

...........

3-l
3-l
3-l
3-1
3-2

3-2
34
3-6
3-6
3-7
3-7
3-7
3-7
3-a
3-9

4-l
41
41
4-l
4-l

List Of Illustrations

SECTION 2

Figure 2-l
Figure 2-2
Figure 2-3
Figure 24
Figure 2-5
Figure 2-6
Figure 2-7
Figure 2-8
Figure 2-9
Figure 2-10
Figure 2-11
Figure 2-12
Figure 2-13

Figure 2-14
Figure 2-15
Figure 2-16
Figure 2-17

Figure 2-18
Figure 2-19
Figure 2-20
Figure 2-21
Figure 2-22
Figure 2-23
Figure 2-24
Figure 2-25
Figure 2-26
Figure 2-27
Figure 2-28
Figure 2-29
Figure 2-30
Figure 2-31
Figure 2-32
Figure 2-33
Figure 2-34
Figure 2-35
Figure 2-36
Figure 2-37
Figure 2-38
Figure 2-39

Figure 240
Figure 241
Figure 242

- Operation

Test Fixture Rear Panel
Connecting Interlock Circuit to Source Measure Units
Interlock Circuit Wiring
Front Panel Showing Signal Panel and Component Test Module

Jumper Installation Examples ..........................

Example of Module Guarding ..........................

Source Measure Unit Connections .......................

Unguarded Current Source Connections

Guarded Current Source Connections ....................

Unshielded Voltage Source Connections

Shielded Voltage Source Connections
Unguarded Electrometer Connections

Guarded Electrometer Connections ......................

Matrix Card Connections .............................

Unshielded DMM Connections .........................

Shielded DMM Connections
Path Isolation Equivalent Circuit

Path Isolation Resistance ..............................

Current Error Caused by Path Isolation Resistance
Shielding Example Using Triaxial Cables
Shielding Example Using Coaxial Cables
GuardedCircuit

....................................

Typical Guarded Signal Connections
PowerLineGroundLoops

EliminatingGroundLoops

Unshielded Kelvin Connections
Shielded Kelvin Connections
Kelvin Connections Equivalent Circuits
EliminatingOscillations
Test Configuration for Diode Tests
Jumper Installation for Diode Tests
EquiwlentCititforVFvs.IFTests
Equivalent Circuit for Leakage Test
Equivalent Circuit for Zener Diode Test
Test Configuration for Transistor Tests
Typical Jumper Installation for Transistor Tests
Test Configuration for Current Gain Test
Test Setup for Measuring Common-emitter Characteristics
Configuration for ICBO Test
Equipment Connections for Op Amp Tests

IC Power Supply Connections

Typical Jumper Installation for IC Test

...............................

........

..............................

..................

..................

....................

....................

...........................

........................

..........

..................

..................

.....................

............................

............................

........................

..........................

..................

..............................

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......................

....................

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..................

...................

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.................

....

...........................

................

..........................

...................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

................

2-2
2-2
2-3
24
2-6
2-7
2-9
2-12
Z-13
2-14
2-15
2-16
2-17
2-18
2-19
2-20
2-21
2-22
2-22
2-23
2-24
2-24

2-25
2-26
2-27
2-27
2-27
2-28
2-31
2-35
2-36
2-36
2-37
2-37
2-38
2-39
240
241
241

242

242

243

Figure 243 Circuit to Determine Input Bias Current

. . . . . . . . . . . .

Figure 244 Determining Input Offset Voltage Using DMM . , . . .
Figure 245 Determining Input Offset Voltage Using Nanovoltmeter
Figure 246
Figure 247

Semiconductor Parameter Analysis Switching System

Typical Test ConfIguration . . . . . . . _ . . . . .

....................

....................

....................

244
2-M
244
2-45
246

SECTION 3

Figure 3-l
Figure 3-2
Figure 3-3
Figure 34
Figure 3-5
Figure 3-6
Figure 3-7
Figure 3-8

- Service Information

Path Isolation Verification Triax Connections

Path Isolation Verification BNC Connections
Triex Conmdion+s for Offset Current Test .
BNC Connections for Offset Current Test

Connections for AC Response Test . . . .

Fixture Disassembly . . . . . . . . . . .

Hinge Alignment . . . . . . . . . . . .

Safety Interlock Switch Adjustment . .

. .

....................

....................

....................

....................

....................

....................

....................

....................

3-3
3-3
3-5
3-5
3-7
3-a
3-8
3-9

List Of Tables

SECTION 3

Table 3-l
Table 3-2

- Service Information

Recommended Test Equipment .

PerfonnanceRecord . ..______.......____.__.,,._____......_.._.....,.....__ 3-2

3-1

SECTION 1

General Information

1.1 INTRODUCTION

This section contains general information about the
Model 8006 Component Test Fixture, and it is arranged in

the following manner:

1.2 Features

1.3 Warranty Information

1.4 Manual Addenda

1.5 Safety Symbols and Terms

1.6 Specifications

1.7 Unpacking and Inspection

1.8 Repacking for Shipment

1.9 Optional Accessories

1.2 FEATURES

Two axial lead sockets (2Omm and 3Omm spacing),
five TO package sockets, (two 4-pin, 8-pin, IO-pin, and

lZpin), and one 28-pin ZIF (zero insertion force) DIP

socket.
Color-coded mini jumpers supplied for easy device

connections.
All connecting points are clearly marked to minimize
the possibility of errors when making test connections.
Hinged lid with light-tight gasket and ground straps
for shielded measurements.

1.3 WARRANTY INFORMATION

Warranty information is located on the inside front cover
of this instruction manual. Should your Model 8006 re­quire warranty service, contact the Keithley representa­tive or authorized repair facility in your area for further
information. When returning the fixture for repair, be
sure to fill out and include the service form at the back of
this manual in order to provide the repair facility with the
necessary information.

1.4 MANUAL ADDENDA

The Model 8006 Component Test Fixture provides a con­venient way to connect a variety of instrumentation to
standard packaged semiconductor devices. Although
primarily intended for use with Keithley Models 236 and
237 Source Measure Units, the Model 8006 can also be
used with a variety of other instrumentation, including
voltage and current sources, DMMs, LCR meters, oscillo-

scopes, analyzers, CV meters, and electrometers. The

Model 8006 has eight component sockets to simplify con-

nections to a variety of devices.

Key features of the Model 8006 include:

l

12 triax connectors for connecting up to six Source
Measure Units or other instrumentation requiring tri­axial connections.

l

Two BNC connectors and five binding posts for addi­tional instrument cormections.

l

Interlock connector for safe operation.

Any improvements or changes concerning the test fiu­ture or manual will be explained in an addendum in­cluded with the the unit. Be sure to note these changes
and incorporate them into the manual before using or
servicing the fixture.

1.5 SAFETY SYMBOLS AND TERMS

The following symbols and terms may be found on an in­strument or used in this manual.

The A symbol on an instrument indicates that the
user should refer to the operating instructions located in

the instruction manual.

The

age may be present on the terminal(s). Use standard

symbol on an instrument shows that high volt-

l-1

SECTION1
General Information

safety precautions to avoid personal contact with these
voltages.

The - screw must be connected to safety earth ground

0

using #18 AWG or larger wire.

The WARNING heading used in this manual explains
dangers that might result in personal injury or death. AI­ways read the associated information very carefuuy be
fore performing the indicated procedure.

The CAUTION heading used in this manual explains
hazards that could damage the unit. Such damage may
invalidate the warranty.

1.6 SPECIFICATIONS

Model 8006 specifications may be found at the front of
this manual.

1.7 UNPACKING AND INSPECTION

l

Source Measure Unit overlays to label jacks with
Model 236/237 input/output nomenclature.

l

Model 8006 Instruction Manual.

. Additional accessories as ordered.

1.7.3 Instruction Manual

If an additional instruction manual is required, order the
manual package, Keithley part number 8006-901-00. The
manual package includes an instruction manual and any
pertinent addenda.

1.8 REPACKING FOR SHIPMENT

Should it become necessary to return the Model 8006 for
repair, carefully pack the unit in its original packing car­ton or the equivalent, and include the following informa­tion:

. Advise as to the warranty status of the test fixture.
. Write ATTENTION REPAIR DEPARTMENT on the

shipping label.

l

Fill out and include the service form located at the back
of this manual.

1.7.1 Inspection for Damage

Upon receiving the Model 8006, carefully unpack it from
its shipping carton and inspect the fixture for any obvi­ous signs of physical damage such as misalignment of the
lid and base. Report any such damage to the shipping
agent immediately. Save the original packing carton for
possible future reshipment.

1.7.2 Shipment Contents

The following items are included with every Model 8006
order:

Model 8006 Component Test Fixture.
30 standard color-coded Teflon@ mini jumpers, 10
each red (Model 8006-MJsl), black (Model
8006~MJSZ), and blue (Model 8006M&3).
8 guarded Teflon@ mini jumpers (Model 8CH&MJG)
for shielded or guarded connections.
Red/black pair of Teflon@ clip jumpers.
Safety Interlock Cable (Model 236-ILC-3).
Safety Grounding Cable (Model 8007-GND-3)
Component Test Module (Model 8006CTM)

1.9 ACCESSORIES

Model 236-ILC-3 Interlock Cable - The Model
236~ILC-3 Interlock Cable connects the Model 8006 to the
interlock circuit of the Model 236/237 Source Measure
Unit. The Model 236-ILC3 is 3m (loft.) in length.

Model 4801 Low-noise BNC Cable -The Model 4801 is
a low-noise coaxial cable, 1.2m (48in.1 in length, with
male BNC connectors on each end. The Model 4801 can
be used for low-noise connections to the BNC connectors
on the Model 8006.

Model 7051 BNC Cables - The Model 7051-2 is a 0.6m
(2ft) BNC to BNC RGd8C cable. The Model 7051-5 is
similar to the Model 7051-2 except that it is 1.5m (51%)
long. The Model 7051 cables can be used to connect in­struments to the BNC connectors on the Model 8006. The
Model 7051 cables have a nominal 5Oa characteristic im­pedance.

Model 7078-TRX Triax Cables -The Model 7078-m
T&xx cables are low-noise cables terminated with male 3­slot triax connectors. The Model 7078-TRX-3 is 0.9m (3 ft.)

l-2

SECTION I

General Information

in length, and theMode 707%TRX-10 is3.Om(lO ft.) long.
The Model 707%TRX cables are recommended for mak­ing connections between the triax connectors on the
Model 8006 and external instrumentation such as the
Model 236/237 Source Measure Units.

Model 8006~CTh4 Component Test Module - The
Model 8006.CIMComponent Test Module is the module
supplied with the Model 8006 Test Fixture. The Model
8006cTM has two sets of axial lead Kelvin component
clips, five TO package sockets (two 4-pin, S-pin, IO-pin,
and 12;pin), and one 24-pin DE’ ZIF (zero insertion force
socket).

Model 8006-MJC Teflon@ Red/Black Clip Jumpers ­These clip jumpers can be used to make connections di-

rectly to component test leads.

Model 8006-MJG Guarded Teflon@ Mini Jumpers ­The Model 8006-MJG contains eight guarded mini jump-

ers like the guarded jumpers supplied with the Model

8006.

Model 8006-MJS Teflon@ Mini Jumpers -The Model
8006-MJS mini jumpers are the standard mini jumpers
supplied with the Model 8006. The jumpers are available
in three colors: black (Model 8006-MJS-I), red (Model
SC06-MJS-2), and blue (Model 8006-MJS-3). Each package
contains 10 jumpers.

Model 8007-GND-3 Safety Grounding Cable - The
Model 8007-GND-3 Safety

Groundmg

Cable is intended
for connecting fixture chassis ground to safety earth
gnxmd. One Model 8007-GND-3 is supplied with the test
fixture, and the cable is 3m (loft.) in length.

Source Measure Unit Overlays (PA-287)-The overlay
cards allow convenient identification of the rear panel
and signal panel jacks to correspond to Model 236/237
Source Measure Unit input/output nomenclature.

l-3

SECTION 2

Operation

2.1 INTRODUCTION

This section contains information on making connections
to the Model 8006, as well as considerations when

ing measurements using

ized as follows:

Panel Configuration: Briefly discusses the connec-

2.2
tars and sockets located on the rear, instrument, and
component panels.

Instrument Connections: Shows how to connect

2.3

various types of instruments to the fixture, including

Source Measure Units, current and voltage sources, elec­trometers, and matrix cards.

Measurement Considerations: Outlines a number

2.4
of considerations that should be observed for optimum
performance when using the test fixture.

Typical Applications: Covers typical test fixture

2.5
appbcations such as diode, transistor, and IC tests.

The Model 8006 is intended for use by those
who are familiar with using potentially haz­ardous voltages. Refer to the safety precau­tions summarized at the front of this manual
before using the Model 8006.

the test fixture, and it is organ-

WARNING

mak-

WARNING
The maximum differential signal voltage is
1lOOV peak. The maximum signal current
for all connectors is 1A peak. Exceeding
these values may create a shock hazard.

@-.

fixture to safety earth ground.

LID INTERLOCK Connector - The LID INTERLOCK
is used with the Models 236 and 237 Source Measure
Units, and provides a measure of safety when using haz­ardous voltages. A interlock circuit prevents the unit
from applying power to the test fixture when the lid is
open. Figure 2-2 shows how to connect the safety inter­lock to the unit using the supplied interlock cable.

Tlus terminal is intended for connecting the test

WARNING

Connect this terminal to safety earth ground
using a #18 AWG or largerwire before mak­ing any other connections to the test fixture.
Use the supplied safety ground cable fort&
connection.

WARNING
Turn off the instrument power before con­necting the interlock cable.

2.2 PANEL CONFIGURATION

The various connectors and sockets located on the Model
8006 are discussed below.

2.2.1 Rear Panel

The rear panel of the fixture is shown in Figure 2-1. Con­nectors located on the rear panel are summarized below.

Figure 2-3 shows safety interlock circuit wiring for those
who wish to configure the safety interlock circuit for use
with other equipment. Typically, the interlock switch
would be connected to some form of digital detection cir­cuits, as shown in Figure 2-3C. In this example, the
switch is connected to a single NAND gate, with a pull­up resistor used on the input. other typical interfacing
examples include connection to a digital I/O port avail­able on some instruments (for example, a Model 230 Volt­age Source), and directly to a microprocessor through a
PL4 (Peripheral Interface Adapter). Other Keithley in-

struments

with digital I/O ports include: Models 705 and

2-l

SECTZON 2

Operation

Lid Interlock

COllflectOr

Figure 2-1. Test Fixture Rear Panel

SNC (Coax)
COlVlFXiOlS

Chassis
Ground

Connect @ terminal
to safety earth ground using
#I 8 AWG minimum wire.
(Use supplied ground cable)

Binding

Posts

Interlock

connector

\ I

Model 2361237

Source Measure Unit

WARNING : Safe operation requires use of

lid interlock.

Lid Interlock Cable (236.ILC-3)

Figure 2-2. Connecting Interlock Circuit to Source Measure Units

, Lid Interlock Connector

WARNING :
Connect @ terminal
to safety earlh ground using
#I8 AWG minimum wire.
before use.

2-2

SECTZON 2

Operation

Figure 2-3.

r---­l
I

Internal

I ‘&$;g”
I

--------_

Interlock Circuit Wirin,q

lLlrP

A. Lid Open

I

---

I

----_

0

2 3

1

r----

I I

I I

I I

I I

-------__

r O+~V - - - -/

l**

-----__

Digital Interlock Detect

C. Typical Digital Circuit tnterfacing

Internal
Interlock

Switch

i

q

. Lid Closed

I

0

2 3

1

706 Scanners, Model 220 Current Source, and Model 707
matrix.

WARNING
User-supplied lethal voltages may be ex­posed when the lid is open. Safe operation
requires the use of the lid safety interlock.

CAUTION
Do not exceed the specified ratings of the in­terlock circuits (28V, 0.05A).

NOTE
The safety interlock cable supplied with the
Model 8006 must be used in order for the unit
to properly recognize that the test fixture lid is
open.

TRIAX Connectors-TheTRL4X connectors are laid out
in four groups of three connectors each, for a total of 12.
The center conductor of each t&.x connector is SIGNAL,

the inner ring is GUARD, and the outer ring is connected

to chassis ground. Note that the GUARD signal path can
be used either for LO or guard when guarding is re­quired.

WARNING
Maximum trim connector common-mode
signal voltage is 1lOOV peak. Maximum volt­age between signal and GUARD is 600V
pd.

BNCConnectors-TwoBNCconnectorsareincludedto
provide shielded connections. The center conductor is
SIGNAL, and the shell of each jack is SHELL (LO).

WARNING

Maximum BNC connector common mode
signal voltage is 30V RMS (dc to 60Hz).

5-Way Binding Posts-Four of the binding posts can be
used for such purposes as routing power to components
being tested. These posts are numbered 1 through 4 The

2-3

SECTION 2
Operation

fifth binding post is chassis ground, and it is intended for
measurement grounding connections only.

WARNING
With hazardous voltages (>3OV RhCS, ob­serve the following safety precautions when
using banana plugs.

1. Turn off all sources and discharge all ca­pacitors before connecting them to the
banana plugs.

2. Dress all wires to ensure that no conduc­tive surfaces are exposed after connecting
them to the binding posts.

3. Always use the lid interlock with any
scmrces connected to the banana plugs
(see the lid interlock discussion above).

2.2.2 Signal Panel

Figure 2-4 shows the signal panel of the test fixture. The
signal panel has a number of test jacks that provide con-

necting points for the input/output pathways via the
rear panel connectors. Each test jack on the panel is
clearly marked with the corresponding rear panel con­nector terminal. For example, the four sets of triax termi­nals are individually marked as SIGNAL and GUARD to
correspond to the SIGNAL and GUARD terminals of
each rear panel TRIAX connector. The TRIAX connectors
are numbered 1 through 12 in the same manner as the
rear panel connector numbering.

The signal panel also has a test jack (PANEL SHIELD)
that is connected to the shield located immediately under
the signal panel. This jack can be connected to circuit LO
for additional shielding, or it can be guarded by connect­ing it an appropriate guard potential from one of the sig­nal panel jacks.

2.2.3 Component Test Module

Figure 24 shows the component test module, which con­tains sockets for a variety of device packages. These sock­ets include:

Signal
Panel

Component Test
Module Shield

Connection

t-

Module Fasteners

‘igure 24. Front Panel Showing Signal Panel and Component T&Module

I-

+

Triax

COnIlSCtiOllS

ZIF Socket

Handle

2-4

!

SECTION 2

Operdon

Two axial Kelvin clip pairs (2Omm and 3Omm spacing):
Used for two-terminal axial-lead devices such as diodes,

capacitors, and resistors. Each clip has a SENSE and a

SOURCE connection which provide Kelvin

to the device.

Two 4-pin TO package sockets (small pin and large pin):

Intended primarily for use with transistors.

Three multi-pin TO package sockets (S-pin, IO-pin, and

l&pin TO-5): Designed for use with multi-pin transistor
and IC packages.

28-pin dual in-line package ZIF socket: Accepts DIP
packages up to 28 pins with 0.3 to 0.6in. lead spacing. The
associated handle should be raised to open the socket,

lowered to close the socket.

Each socket terminal has an associated test jack intended
to connect that terminal to the desired input/output

pathway using the supplied mini jumpers.

connections

2.2.4

Device Handling

When handling very high impedance devices (such as
high-megohm resistors) be careful not to contaminate the

body of the device, which would lower its impedance.
Also take care when handling static-sensitive devices
such as MOSFETs so as not to damage them with static
discharge. Handle such devices only at a grounded work
station, and also ground yourself with a suitable wrist
strap. Keep static-sensitive devices in their protective
containers until ready for testing.

Axial Kelvin Clips

To install an axial component such as a resistor or diode
in one of the two sets of axial Kelvin clips, hold the device
by the test lead ends, then carefully push the device leads

down into the clips until the device is properly seated.

Installing Devices in Sockets

NOTE
With some devices, you may encounter de­vice oscillation which could affect measure­ments. Refer to paragraph 2.4.10 for details on
verifying and preventing oscillation.

One of the test jacks (MODULE SHIELD) is connected to
a box shield immediately under the component test mod­ule. This jack allows the shield to be connected to circuit
LO for additional shielding, or to a guard potential if de-

sired.

Module Removal and Installation

The Model 8006~CTM Component Test Module is de-

signed for easy removal and installation. Additional
modules can be purchased, allowing several device and
circuit configurations to be easily interchanged for rapid
testing.

To remove the component test module, first disconnect
all jumpers to the signal panel, then pulJ up on the four

fasteners that secure the module to the base (see
Figure Z-4 for locations). After the fasteners are released,
pull up on the module to remove it from the base.

To install the module, install it in the base with the fasten-

ers aligned in the corresponding holes, then push down

on the four fasteners to secure the module to the base.

TO Package Sockets
For TO package installation, carefully spread the leads

apart so that they will line up with the holes in the socket,
then slide the device leads down into the holes, taking
care not to bend any of the leads. When installing these
devices, be sure to line up the tab on the package body
with the indicated tab position on the panel. Doing so

will ensure that the numbers on the panel will corre

spend to the actual device terminal numbering.

DIP Socket

Toinstall a deviceontheDIPsocket, firstraisetheleverat

the side of the socket to open the socket, then carefully in­stall the device on the socket. Once the device is properly
seated, lower the lever to lock the device into place.

To remove a device from the DIP socket, first raise the
lever, then pull the device free of the socket.

2.2.5 Installing Jumpers

In order to complete device connections, it will be neces­sary for you to install the mini jumpers between the ap-

2-5

SECTION 2
Operation

propriate socket jacks and the desired input/output
pathway jacks located on the signal panel.

Standard Mini Jumpers

For many cormections, the standard color-coded jumpers
supplied with the Model 8006 can be used. These jumpers
can be stacked to allow two or more connections to a sin­gle jack. Figure 2-5 shows an example of jumpers in­stalled between the binding uost jacks and one mix of ax-

1

ial component sockets usi@ 4&e connections.

Guarded Jumpers

For critical measurements requiring low offset current,
low noise, or high path isolation, the guarded jumpers
should be used with the jumper shield connected to the

Standard

Jumper

appropriate GUARD or SHELL jack on the signal panel.
Doing so will shield or guard the sensitive pathway right
down to the device socket.

Figure 2-5 also shows an example of connections using a
guarded jumper. Note that the jumper shield is con­nected to the GUARD terminal of one of the triax con­necting jacks, while the center conductor at the same end
is connected to SIGNAL.

WARNING
Make certain hazardous voltages are notpre­sent on any of the front panel terminals be­fore installing jumpers. To avoid a possible
shock hazard, always use the lid safety inter­lock, and discharge all capacitors before in­stalling or removing jumpers.

Guarded Jumper

(Connect shield to ward)

SECTION 2

Owation

Jumper Cleaning
In critical applications, or in high-humidity environ-

ments, it
Freon@ or methanol before using them. Allow the jump-

ers to dry thoroughly (several hours in a low-humidity
environment) before use, and handle
clean gloves after cleaning to avoid new contamination.

All jumpers should be periodically cleaned with Freon@
or methanol to remove dirt or other contamination that
could degrade overall performance. Again, cleaned

jumpers should be allowed to dry for several hours in a

low-humidity ambient-temperature environment, or for

30 minutes to one hour in a 50°C low-humidity environ-

ment before use.

2.2.6

Each triax pathway can be individually guarded by ap­plying the guard signal to the inner shield of the cable.
When using the Model 236 or 237 Source Measure Unit,
guard is automatically applied through the inner shield
of the OUTPUT HI and SENSE HI connectine cables and
appears at the

may

be necessary to clean the coax jumpers with

them only

Panel and Module Guarding

GUARD jacks

for the assoduted signal

with

panel triax connections. You can connect this guard to the
PANEL or MODULE SHIELD jack, as shown in the ex­ample of Figure 2-6.

Additional information on guarding is located in para­graph 2.4.4.

2.2.7

A set of Source Measure Unit overlays is supplied to al­low convenient marking of rear panel and signal panel
jacks to correspond to Model 236/237 input/output no­menclature. Blank overlays are also supplied to suppoti

custom test configurations.

Source Measure Unit Overlays

2.3 INSTRUMENT CONNECTIONS

The following paragraphs discuss connecting the Model
8006 Test Fixture to typical instruments including Source
Measure Unit, current and voltage sources, electrome­ters, matrix switching cards and DMMs. Recommended
cables for the various connectine schemes are also cov­ered.

”

Jumper connected

between triax a

guard and

component test

module

Figure 2-6. Example of Module Guarding

2-7

SECTION 2

operation

WARNING
Do not exceed the maximum test fiie sig­nal level, as defined in the specifications and
stated on the rear panel. Always bun off all
power and discharge all capacitors before
connecting or disconnecting cables. Lethal

voltages may be exposed when the lid is

open. Safe operation requires the use of the

lid safety interlock (see paragraph 2.2.1).

2.3.1 Source Measure Unit Connections

Typical connections between the Model 8006 and the
Model 236/237 Source Measure Units are shown in
Figure 2-7. Note that remote sensing, and two connecting
methods for local sensing are shown.

NOTE
With some devices, you may encounter de­vice oscihtion that will affect your measure­ments. Refer to paragraph2.4.10 for details on
verifying and preventing oscillation.

both OUTPUT LO and SENSE LO via the inner shield
and center conductor respectively.

Be careful not to confuse the terminal conventions on the
Source Measure Unit and the test fixture. HI appears on
the SIGNAL jacks,and guard OUTPUT HI and SENSE HI
actnally appears on the GUARD jacks on the signal panel
of the test fixture. As with all connections, you must com­plete the connections to the DUT in the appropriate de­vice socket with the mini jumpers. Use standard mini
jumpers for unshielded and unguarded pathways, and
use guarded jumpers for guarded or shielded pathways.

Local Sensing Connections (Banana Plug for LO)
Connections for local sensing require only one fxiax ca-

ble, and a single banana plug patch cord (Figure2-7C and
2-7D). Note that local sensing is recommended only for
lower current situations where voltage drops XTOSS the
test cables and connectors is not a consideration. Also,
this configuration is recommended for less-critical appli­cations where noise is not a problem.

Remote Sensing Connections
Remote sensing connections are shown in Figure 2-7A

and 2-78. Model 7078-TRX t&x cables are recommended
for all three connections. For the OUTPUT HI and SENSE
HI cables (A and B), the center conductor is HI, the inner
shield is GUARD, and the outer shield is chassis ground.
Note that the remaining cable (connected to C) carries

Local Sensing Connections (T&IX Cable for LO)
Where noise pickup is a consideration, the local sensing

connections shown in Figure 2-m and 2-7F are recom­mended. Here, two Model 7078~TRX tiax cables are used
to connect the Source Measure Unit to the test fixture.
When installing jumpers, keep in mind that OUTPUT LO
appears on GUARD on the signal panel with this connec­tion scheme.

2-8