3330_902_01A.pdf part of Keithley 3330 902 01A 3330_902_01A.pdf, Keithley 3330 3330_902

Text preview for : 3330_902_01A.pdf part of Keithley 3330 902 01A Keithley 3330 3330_902_01A.pdf

Back to : 3330_902_01A.pdf | Home

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 batter-
ies, 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 leak-
age, or problems arising from normaI wear or failure to follow instructions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTI ES, 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 INSTRU-
MENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE OF THE POS-
SIBILITY 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 DAM-
AGE TO PROPERTY.

Keithley Instruments, Inc. 28775Aurora Road Cleveland, OH 44139 440-248-0400 Fax: 440-248-6 168 http://www.keithley.com
l l l l l

CHINA: Keithley Instruments China. Yoan Chen Xin Building, Room 705 * 12Ymnin Road, Dewai, Madian * Beijing 100029~8610-62022886 l Fax: 8610-62022892
FRANCE: Keithley Instruments SARL l BP 60 l 3 All&e des Garays l 91122 Palaiseau (adex * 33-I-60-11-51-55 * Fax: 33-1-60-I l-77-26
GESMANY Keithley Instruments GmbH * Landsberger Strasse 65 l D-821 10 Germering, Munich l 49-89-8493070 l Fax 49-89-84930759
GREAT BRITAIN: Keithley Instruments, Ltd. l The Minster l 58 Porunan Road l Reading, Berkshire, England RG3 lE.4 l 44-l 189-596469 l Fax: 44- 1189-575666
ITALY: Keithley Instruments SRL l Viale S. Gimignano 38 l 20146 Milano * 39-2-48303008 l Fax: 39-z-48302274
NETHERLANDS: Keithley Instruments BV * Avelingen West 49 * 4202 MS Gorinchem * 31-(0)183-635333 l Fax 31-(0)183-630821
SWITZERLAND: Keithley Instruments SA. Kriesbachsuasse 4 l 8600 Diibendorf l 41-I-8219444 *Fax: 41-l-8203081
TAIWAN: Keithley Instruments Taiwan l IFI.., 85 POAi Street l Hsinchu, Taiwan l 886-3-572-9077 * Fax: 886-3-572-9031
Model 3330 LCZ Meter
Service Manual

01993, Keithley Instruments, Inc.
Test Instrumentation Group
All rights reserved.
Cleveland, Ohio, U.S.A.
First Printing February 1993
Document Number: 3330-902-07 Rev. A
ALIKeithley product namesare trademarksor registeredtrademarksof Keithley Instruments,Inc.
Other brand and product namesare trademarksor registeredtrademarksof their respectiveholders.
Safety Precautions

The following safety precautions should be observedbefore using Usersof this product must be protected from electric shock at all
this product and any associatedinstrumentation.Although somein- times. The responsiblebody must ensure that usersare prevented
struments and accessories would normally be used with non-haz- access and/orinsulated from every connection point. In somecases,
ardous voltages, there are situations where hazardousconditions connectionsmust be exposedto potential human contact. Product
may be present. usersin thesecircumstancesmust be trained to protect themselves
from the risk of electric shock. If the circuit is capableof operating
This product is intended for use by qualified personnelwho recog- at or above 1000volts, no conductive part of the circuit may be
nize shock hazardsand are familiar with the safety precautionsre- exposed.
quired to avoid possible injury. Read the operating information
carefully beforeusing the product. As described in the International Electrotechnical Commission
(IEC) Standard IEC 664, digital multimeter measuring circuits
The types of product usersare: (e.g.,Keithley Models 175A, 199,2000,2001,2002, and 2010) are
Responsible body is the individual or group responsiblefor the use Installation CategoryII. All other instruments' signal terminals are
and maintenanceof equipment, for ensuring that the equipmentis Installation CategoryI and must not be connectedto mains.
operatedwithin its specifications and operating limits, and for en-
suring that operatorsare adequatelytrained. Do not connectswitching cardsdirectly to unlimited power circuits.
They are intended to be used with impedance limited sources.
Operators use the product for its intended function. They must be NEVER connectswitching cardsdirectly to AC mains. When con-
trained in electrical safety proceduresand properuse of the instm- necting sourcesto switching cards,install protectivedevicesto lim-
ment. They must be protectedfrom electric shockand contact with it fault current and voltage to the card.
hazardouslive circuits.
Before operatingan instrument, makesure the line cord is connect-
Maintenance personnel perform routine procedures the product
on ed to a properly groundedpower receptacle.Inspectthe connecting
to keep it operating, for example, setting the line voltage or replac- cables,test leads,andjumpers for possible wear, cracks, or breaks
ing consumablematerials.Maintenanceprocedures describedin
are before eachuse.
the manual.The proceduresexplicitly stateif the operatormay per-
form them. Otherwise, they should be performed only by service For maximum safety,do not touch the product, test cables, or any
personnel. other instrumentswhile power is applied to the circuit under test.
ALWAYS removepower from the entire test systemand discharge
Service personnel are trained to work on live circuits, and perform any capacitorsbefore:connecting or disconnectingcables or jump-
safeinstallations and repairs of products.Only properly trained ser- ers, installing or removing switching cards, or making internal
vice personnelmay perform installation and service procedures. changes,such asinstalling or removing jumpers.
Exercise extreme caution when a shock hazard is present.Lethal Do not touch any object that could provide a current path to the
voltage may be presenton cable connectorjacksor test fixtures. The commonside of the circuit under test or power line (earth) ground.
American National StandardsInstitute (ANSI) statesthat a shock Always make measurements with dry hands while standing on a
hazard exists when voltage levels greater than 30V RMS, 42.4V dry, insulated surface capable of withstanding the voltage being
peak,or60VDC~epresent.Agoodsafetypracticeistoexpect measured.
that hazardous voltage is present in any unknown cir-
cuit before measuring.
The instrument and accessories must be usedin accordance with its The WARNING heading in a manual explains dangersthat might
specificationsand operating instructions or the safety of the equip- result in personal injury or death.Always read the associatedinfor-
ment may be impaired. mation very carefully before performing the indicated procedure.

Do not exceedthe maximum signal levels of the instrumentsandac- The CAUTION heading in a manual explains hazardsthat could
cessories,as defined in the specifications and operating informa- damagethe instrument. Such damagemay invalidate the warranty.
tion, and as shown on the instrument or test fixture panels, or
switching card. Instrumentation and accessories
shall not be connectedto humans.

When fusesareusedin a product, replacewith sametype and rating Before performing any maintenance,disconnect the line cord and
for continued protection against fire hazard. all test cables.
To maintain protection from electric shock and fire, replacement
Chassisconnections must only be used as shield connections for
componentsin mains circuits, including the power transformer,test
measuringcircuits, NOT as safety earth ground connections.
leads, and input jacks, must be purchased from Keithley Instru-
ments. Standard fuses, with applicable national safety approvals,
If you are using a test fixture, keepthe lid closedwhile power is ap-
may be usedif the rating and type are the same.Other components
plied to the device under test. Safe operation requires the use of a
that arenot safety relatedmay be purchasedfrom other suppliers as
lid interlock.
long asthey are equivalent to the original component.(Note that se-
lected partsshould be purchasedonly through Keithley Instruments
Ifa@ screwis present,connectit to safetyearthground using the
to maintain accuracy and functionality of the product.) If you are
wire recommended the user documentation.
in
unsure about the applicability of a replacementcomponent,call a
Keithley Instruments office for information.
The a ! symbol on an instrument indicatesthat the user should re-
fer to the operating instructions located in the manual.
To clean the instrument, use a damp cloth or mild, water based
cleaner. Clean the exterior of the instrument only. Do not apply
The A symbol on an instrument showsthat it can sourceor mea-
cleaner directly to the instrument or allow liquids to enter or spill
sure 1000 volts or more, including the combined effect of normal
on the instrument.
and common mode voltages. Use standard safety precautions to
avoid personalcontact with thesevoltages.

Rev. l/99
HOW TO USE THIS MANUAL

r
Details procedures to verify that the instrument meets
stated specifications.
SECTlON 1
Performance Verification

Describes basic operating principles for the varicws circuits in SECTION 2
the Model 3330.
Principles of Operation

Covers fuse replacement, calibration and repair of the instru-
ment, and lists replacement parts.
SECTION 3
Service Information

WARNING
The information in this manual is intended for qualified serv-
ice personnel who can recognize possible shock hazards. Do
not attempt these procedures unless you are qualified to do so.
Table of Contents
SECTION 1 - Performance Verification
1.1 ~ODU~ON .............................................................. l-l
1.2 lJ?XIULCONDlTIONS ......................................................... l-l
1.3 LINEPOWER ................................................................. l-l
1.4 VERIFIcATlONLIMITs ......................................................... l-l
1.5 MEASUREMENTSIGNALTESTS ................................................. l-2
1.5.1 EnvironmentalConditions ..................................................... l-2
1.5.2 Recommended Test Equipment .................................................. l-2
1.5.3 FrequencyAccuracy.. ........................................................ l-3
1.5.4 Measurement Signal Level Accuracy .............................................. l-3
15.5 Measurement Signal Distortion .................................................. l-4
1.5.6 OutputImpedanceAc~a~ .................................................... l-4
15.7 Internal Bias Voltage Accuracy .................................................. l-6
1.5.8 ExternalDCBiasVoltageRange ................................................. 1-6
1.6 MEAsuREMENTACcuRAcyTESTS.. ............................................ l-7
1.6.1 EnvironmentiCondiiions ..................................................... l-7
1.6.2 RecommendedEquipment ..................................................... l-7
1.6.3 Recommended Standards Accuracy .............................................. l-7
1.6.4 Resistance Measurement Accuracy ............................................... l-8
1.6.5 Capa~~ceReadingChecks.......................................- ............ l-11
1.6.6 InductanceReadingChecks .................................................... l-11

SECTION 2 - Principles of Operation
2.1 INTRoDucTON......................................-....~.............~ ..... 2-l
2.2 BLOCKDLAGRAMS ............................................................ 2-l
2.3 CURRENT AND VOLTAGE DETECTION ........................................... 2-l
2.4 lMl?EDANCECALCULATION ................................................... 2-l
2.5 O!XlLLATOR ............................................... . ................ 2-4
2.6 CURRENT-TO-VOLTAGE CONVERTER ............................................ 2-5
2.7 ANALYZER.. ................................................................ 2-5

SECTION 3 - Service Information
3.1 INTRODUCTION .............................................................. 3-l
3.2 FUSEREPLA CEMENT .......................................................... 3-1
3.2s LineFuse .................................................................. 3-1
32.2' ExternalBiasFuse......................- ..................................... 3-l
3.3 CALIBlUTiON ............................................................... 3-l
3.4 FANmLTERCLEANING ........................................................ 3-2
3.5 REl?AIR ..................................................................... 3-2
3.5.1 FactoryService.. ............................................................ 3-2
3.5.2 CoverRemoval............................................................-. 3-2
3.5.3 BatteryReplacement .......................................................... 3-2
3.5.4 OperationCheckProcedure .................................................... 3-4
3.5.5 RepairS~ary ............................................................. 3-4
3.6 RIZLKEABLEPARTS ......................................................... 3-5
3.6.1 PartsList .................................................................. 3-5
3.6.2 OrderingParts .............................................................. 3-5

APPENDICES
A specifications
List of Tables
SECTION 1 - Performance Verificatibn
Table l-1 Recommended Test Equipment for Measurement Signal Tests ........................ l-2
Table l-2 Distortion Measurement Summary ............................................ l-4
Table l-3 Recommended Equipment for Measurement Accuracy Tests ......................... l-8
Table l-4 Resistance &Ieasurement Accuracy Reading Limits ( I Z I ) for 1Vrm.sLevel ............... l-9
Table l-5 Resistance Measurement Accuracy Reading Limits (9) for 1Vrms Level ................. 3-10
Table l-6 Resistance Measurement Accuracy Reading Limits ( I Z I ) for 5OVrms Level .............. 3-10
Table l-7 Resistance Measurement Accuracy Reading Limits (0) for 5OVrms Level ................ 3-10

SECTION 3 - Service Information
Table 3-l RecommendedLineFuse ................................................... 3-l
Table 3-2 Se~-calibrationErr ...................................................... 3-4
Table 33 Operation Check Problem Summary ........................................... 3-4
Table 3-4 Measurement Signal Problem Summary ........................................ 3-5
Table 35 Model 3330 Replaceable Parts ................................................ 3-6
List of Illustrations

SECTION l- Performance Verification
Figure 1-l Connections for Measurement and Signal Level Accuracy ........................... l-3
Figure l-2 Connections for Frequency Accuracy Measurement ................................ l-4
Figure l-3 . Connections for Distortion Measurements ....................................... l-5
Figure l-4 Connections for Output Impedance Tests ....................................... 1-5
Figure l-5 Connections for DC Bias Accuracy Tests ........................................ l-6
Figure l-6 Connections for External DC Bias Voltage Range Test .............................. l-7
Figure l-7 Connections for Resistance Accuracy Measurements ............................... l-9
Figure l-8 Connections for Capacitance and Inductance Reading Checks ........................ l-12

SECTION 2 - Principles of Operation
Figure 2-l Measuring System Block Diagram ............................................. 2-2
Figure 2-2 Hardware Block Diagram ................................................... 2-3
Figure 2-3 Oscillator Block Diagram ......................................... ., ......... 24
Figure 2-4 Current-to-Voltage Converter ................................................ 2-5
Figure 2-5 Analyzer ............................................................... 2-6

SECTION 3 - Service Information
Figure 31 CoverRemoval..................................................-........ 3-3
Figure 32 Model 3330 Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . _ . . . . . . . . 3-7
SECTION 1
Performance Verification

1.l INTRODUCTION 1.2 INITIAL CONDITIONS

The Model 3330 should be turned on and allowed to
The procedures outlined in this section may be used to warm up for at least one-half hour before performing the
verifythattheModel333oLcZMeterisoperatingwithin verification procedures. (The test equipment should also
Emits stated in the specScations. Performance verifica- beallowedtowarmupforthetimeperiodrecommended
tion may be done when the instrument is first received to by the manufacturer..) If the instrument has been sub-
ensure that no damage or misadjustment has occurred jected to extreme temperature or humidity, allow addi-
during shipment. Verification may also be performed tional time for internal circuits to reach normal operating
whenever there is a question of instrument accuracy. temperature. Typically, it takes one additional hour to
stabilize a unit that is 10