Tektronix 3330 Service Manual

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.
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 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 DAM­AGE TO PROPERTY.
Keithley Instruments, Inc. l 28775 Aurora
CHINA: 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: TAIWAN: Keithley Instruments Taiwan l IFI.., 85 PO Ai Street l Hsinchu, Taiwan l 886-3-572-9077 * Fax: 886-3-572-9031
Keithley Instruments China. Yoan Chen Xin Building, Room 705 * 12Ymnin Road, Dewai, Madian * Beijing 100029~8610-62022886 l Fax: 8610-62022892
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Road l Cleveland, OH 44139 l 440-248-0400 l Fax: 440-248-6 168 l http://www.keithley.com
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
ALI 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.
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 recog-
nize shock hazards and are familiar with the safety precautions re­quired to avoid possible injury. Read the operating information carefully before using the product.
The types of product users are:
Responsible body
and maintenance of equipment, for ensuring that the equipment is operated within its specifications and operating limits, and for en-
suring that operators are adequately trained.
Operators
trained in electrical safety procedures and proper use of the instm­ment. They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel
to keep it operating, 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 per-
form them. Otherwise, they should be performed only by service personnel.
Service personnel
safe installations and repairs of products. Only properly trained ser­vice personnel may perform installation and service procedures.
is the individual or group responsible for the use
use the product for its intended function. They must be
perform routine procedures on the product
are trained to work on live circuits, and perform
Users of this product must be protected from electric shock at all times. The responsible body must ensure that users are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential human contact. Product users 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,
exposed.
As described in the International Electrotechnical Commission
(IEC) Standard IEC 664, digital multimeter measuring circuits (e.g., Keithley Models 175A, 199,2000,2001,2002, and 2010) are Installation Category II. All other instruments’ signal terminals are Installation Category I and must not be connected to mains.
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 lim-
it fault current and voltage to the card. Before operating an instrument, make sure the line cord is connect-
ed to a properly grounded power receptacle. Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.
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.
no conductive part of the circuit may be
Exercise extreme caution when a shock hazard is present. Lethal
voltage may be present on cable connectorjacks 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,or60VDC~epresent.Agoodsafetypracticeistoexpect
that hazardous voltage is present in any unknown cir­cuit before measuring.
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.
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.
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 ap-
plied to the device under test. Safe operation requires the use of a
lid interlock.
Ifa@
screw is present, connect it to safety earth ground using the
wire recommended in the user documentation.
The ! a symbol on an instrument indicates that the user should re-
fer to the operating instructions located in the manual.
The A symbol on an instrument shows that it can source or mea-
sure 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 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 the 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.
Rev. l/99
HOW TO USE THIS MANUAL
Details procedures to verify that the instrument meets stated specifications.
r
Describes basic operating principles for the varicws circuits in the Model 3330.
Covers fuse replacement, calibration and repair of the instru­ment, and lists replacement parts.
WARNING
The information in this manual is intended for qualified serv­ice personnel who can recognize possible shock hazards. Do not attempt these procedures unless you are qualified to do so.
SECTlON 1
Performance Verification
SECTION 2
Principles of Operation
SECTION 3
Service Information
Table of Contents
SECTION 1
1.1
1.2
1.3
1.4
1.5
1.5.1
1.5.2
1.5.3
1.5.4
15.5
1.5.6
15.7
1.5.8 ExternalDCBiasVoltageRange .................................................
1.6
1.6.1
1.6.2 RecommendedEquipment
1.6.3
1.6.4
1.6.5
1.6.6
- Performance Verification
~ODU~ON
lJ?XIULCONDlTIONS ......................................................... l-l
LINEPOWER VERIFIcATlONLIMITs
MEASUREMENTSIGNALTESTS .................................................
EnvironmentalConditions Recommended Test Equipment
FrequencyAccuracy.. ........................................................
Measurement Signal Level Accuracy Measurement Signal Distortion OutputImpedanceAc~a~ Internal Bias Voltage Accuracy
MEAsuREMENTACcuRAcyTESTS.. ............................................
EnvironmentiCondiiions
Recommended Standards Accuracy Resistance Measurement Accuracy
Capa~~ceReadingChecks.......................................-
InductanceReadingChecks ....................................................
..............................................................
.................................................................
.........................................................
.....................................................
..................................................
..............................................
..................................................
....................................................
..................................................
.....................................................
.....................................................
..............................................
...............................................
............
l-l
l-l l-l l-2 l-2 l-2 l-3 l-3 l-4 l-4 l-6 1-6 l-7 l-7 l-7 l-7 l-8 l-11 l-11
SECTION 2 - Principles of Operation
2.1
2.2 BLOCKDLAGRAMS
2.3 CURRENT AND VOLTAGE DETECTION
2.4
2.5
2.6 CURRENT-TO-VOLTAGE CONVERTER
2.7
INTRoDucTON......................................-....~.............~
............................................................
lMl?EDANCECALCULATION
O!XlLLATOR
ANALYZER.. ................................................................
...............................................
...................................................
SECTION 3 - Service Information
3.1
3.2
3.2s
32.2'
3.3
3.4
3.5
3.5.1
INTRODUCTION ..............................................................
FUSEREPLA
LineFuse ..................................................................
ExternalBiasFuse......................-
CALIBlUTiON ...............................................................
FANmLTERCLEANING ........................................................
REl?AIR
FactoryService.. ............................................................
CEMENT ..........................................................
.....................................................................
...........................................
............................................
.....................................
. ................
.....
2-l 2-l 2-l 2-l
2-4 2-5 2-5
3-l 3-1 3-1 3-l 3-l 3-2 3-2
3-2
3.5.2
3.5.3 BatteryReplacement ..........................................................
3.5.4 OperationCheckProcedure
3.5.5 RepairS~ary
3.6
3.6.1 PartsList
3.6.2
CoverRemoval............................................................-. 3-2
....................................................
.............................................................
RIZLKEABLEPARTS
..................................................................
OrderingParts
.........................................................
..............................................................
APPENDICES
A specifications
3-2 3-4
3-4 3-5 3-5 3-5
List of Tables
SECTION 1 - Performance Verificatibn
Table l-1 Table l-2 Distortion Measurement Summary Table l-3 Table l-4 Resistance &Ieasurement Accuracy Reading Limits ( I Z I ) for 1Vrm.s Level Table l-5 Resistance Measurement Accuracy Reading Limits (9) for 1Vrms Level Table l-6 Resistance Measurement Accuracy Reading Limits ( I Z I ) for 5OVrms Level Table l-7
Recommended Test Equipment for Measurement Signal Tests
............................................
Recommended Equipment for Measurement Accuracy Tests
Resistance Measurement Accuracy Reading Limits (0) for 5OVrms Level
........................ l-2
.........................
................. 3-10
................ 3-10
SECTION 3 - Service Information
Table 3-l RecommendedLineFuse Table 3-2 Table 33 Table 3-4 Measurement Signal Problem Summary
Table 35 Model 3330 Replaceable Parts
Se~-calibrationErr ......................................................
Operation Check Problem Summary
...................................................
...........................................
........................................
................................................
l-4 l-8
............... l-9
.............. 3-10
3-l 3-4
3-4 3-5
3-6
List of Illustrations
SECTION l-
Figure 1-l Figure l-2 Connections for Frequency Accuracy Measurement Figure l-3 . Connections for Distortion Measurements Figure l-4 Figure l-5 Figure l-6
Figure l-7 Figure l-8 Connections for Capacitance and Inductance Reading Checks
Performance Verification
Connections for Measurement and Signal Level Accuracy
.......................................
Connections for Output Impedance Tests Connections for DC Bias Accuracy Tests Connections for External DC Bias Voltage Range Test
Connections for Resistance Accuracy Measurements
.......................................
........................................
................................
..............................
...............................
...........................
SECTION 2 - Principles of Operation
Figure 2-l Figure 2-2 Figure 2-3 Figure 2-4 Figure 2-5
Measuring System Block Diagram
Hardware Block Diagram Oscillator Block Diagram Current-to-Voltage Converter Analyzer
...............................................................
...................................................
.........................................
.............................................
................................................
SECTION 3 - Service Information
Figure 31 Figure 32
CoverRemoval..................................................-........ 3-3
Model 3330 Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . _ . . . . . . . .
........................
.........
.,
l-3 l-4 l-5 1-5 l-6 l-7
l-9 l-12
2-2 2-3 24 2-5 2-6
3-7
SECTION 1
Performance Verification
1 .l INTRODUCTION
The procedures outlined in this section may be used to verifythattheModel333oLcZMeterisoperatingwithin Emits stated in the specScations. Performance verifica­tion may be done when the instrument is first received to ensure that no damage or misadjustment has occurred during shipment. Verification may also be performed whenever there is a question of instrument accuracy.
NOTE If instrument performance is outside the specified range, and the instrument is still un­der warranty, contact your Keithley represen­tative or the factory to determine the correct course of action.
Performance verification fahs into the foIlowing two gen­eral categories:
1.2 INITIAL CONDITIONS
The Model 3330 should be turned on and allowed to warm up for at least one-half hour before performing the verification procedures. (The test equipment should also beallowedtowarmupforthetimeperiodrecommended by the manufacturer..) If the instrument has been sub­jected to extreme temperature or humidity, allow addi­tional time for internal circuits to reach normal operating temperature. Typically, it takes one additional hour to stabilize a unit that is 10°C (Wl?,I outside the specified temperature range.
1.3 LINE POWER
Be sure to set the line voltage switch on the rear panel to the correct line voltage. The instrument should be tested while operating on a line voltage within +5% of the line voltage switch setting and at a line frequency from 48Hz to 62Hz.
1.4 VERIFICATION LIMITS
l
Measurement signal tests (paragraph 1.5)
l
Measurement accuracy and reading checks (para-
graph 1.6)
The performance verification limits stated in this section reflect only the accuracy specifications of the Model 3330. They do not include test equipment tolerance.
1-l
SECTION 1 Performance Verification
1.5 MEASUREMENT SIGNAL TESTS
Measurement signal tests measure various characteris­tics of the test signal that is applied to the DTJT. These tests include:
l Frequency accuracy
. Measurement signal level accuracy
l
Measurement signal distortion
0 Output impedance accuracy
l li&mal
* External DC bias voltage range
Manufacturer Model
Keithley 197A DMM (AC volts,
DC bias voltage accuracy
Table l-l. Recommended Test Equipment for Measurement Signal Tests
Description
DC volts, 5-l /2 digits)
1.51 Environmental Conditions
All measurement signal tests should be performed at an
ambienttemperatureof23”+5”Candatarelativehumid­ity of 50% + 30%.
IS.2 Recommended Test Equipment
Table l-l lists the test equipment required to perform the measurement signal tests. The procedures for measure­ment signal verification tests are based on using this ex­act equipment. Alternate equipment may be used as long as ihat equipment has specifications at least good as those stated in Table l-l.
Specifications
2VDC range; +(O.Oll% of rdg + 2 counts) 2VAC range; z!$O.35% of rdg + 100 counts)
Philips
PM 6654C Timer/counter PM 9678
Panasonic
Keithley
Keithley
VP-772Z4 Audio analyzer
1681 Test leads
7051-2
Keithley 7754-3 Keithley Keithley Pomona
3324 3325 1468
TCXO option
DC power supply
BNC interconnect cable
BNC to alligator cable Test leads Test leads BNC-banana adapter
Capacitor Resistor switch
O.OlHz-12OMHz; time base aging <l x 10-7/month
lOI&-1lOkHz; 0.01% accuracy at full scale; _+ldB har­monic distortion accuracy from lOH2 to 15.99kHz 04OVDC adjustable, <5mVp-p ripple
Two leads terminated with banana plug and clip-on probes
5OQ coaxial cable (RG58C), male BNC connectors, 2ft.
(0.6m)
Coaxial cable, male BNC connector, two alligator clips
4-terminal alligator clip test lead set
Kelvin clip test lead set
Female BNC connector to double banana plug
lo@?, 1oOVDC 100Q &o-5%, 1/2w Single-pole, single-throw
l-2
Pt7jinmance Verification
SECTION1
1 s.3 Frequency Accuracy
1. ConnecttheModel333OHCURjacktoinputAofthe counter/timer, as shown in Figure l-l. Be sure to co~ect the G terminal of the LCZ meter to the shield of the connecting cable as shown
2. Set the LCZ meter operating modes as follows: FREQ: 1kH.z
LEVELZ 1vrms BIAS: OFF
3. set the counter/timer to measure frequency on in­PUt JJ-
4. Verify that the counter reading is between
0.99995OkHz and 1.00005OkHz &!Spprn~.
1.5.4 Measurement Signal Level Accuracy
1. Conned the Model 3330 H CUR jack to the DMM, as shown in Figure l-2. be sure to connect the G termi-
nal of the LCZ meter. to the shield of the connecting cable as shown.
2. Select the ACV function and auto-ranging on the DMU
3. Set the LCZ meter operating modes as follows:
LEVEL: 1vrms FREQ: 1kHz BLAS: OFF
4. Verify that the DMM reading is between the limits for lVrms, lkH2 operation, as follows:
0.97vrms to 1.03vrms (23.0%).
5. Change the LEVEL to 5OmVrms, and verify the sig­nal level accuracy for lkHz,5OmVrm.s operation is as follows:
47.5mVrms to.52.5mVrms (&!S.O%)
Figure z-1.
Model 3330
to cable shield
Connections
Model 7051-2 Coaxial Cable
for
Measurement and Signal Level Accuracy
l-3
SEcnONl
Pe?yinmance vm.fication
/i I-’
Figure z-2.
Model 3330
*
L
Connect G terminal
to cable shield
Gmnecfionsfar Frequency Accuracy Measurml
/
1
1.55 Measurement Signal Distortion
1. Connect the H CUR jack of the LCZ meter to the dis­tortion meter, as shown in Figure 13. Be sure to con­nect the G terminal of the LCZ meter to the cable shield as shown.
2.
Set the LCZ meter operating modes as follows: LEVEL: 1vrms
BIAS OFF
FREQ lkH.2
3.
Verify that the distortion reading is 0.3% or less, as
summarized in Table l-2.
Model 197A DMM
I
Model 7051-2 Coaxial Cable
C. Press the ENTER/EXlT key twice to complete
2ooHz
7.
Verify that the distortion reading is 0.3% or less.
1 S.6 Output Impedance Accuracy
1. Connect the LCZ meter to the DMM, switch, and re­sistor, as shown in Figure l-4. Be sure that the G ter­minal of the LCZ meter is connected to the cable shield, and that the resistor and switch are connected as shown.
2. Select the 2VAC
3.
Set the LCZ meter operating modes as follows:
Pomona 1468
programming.
range on the DMM.
Table l-2. Distortion Measurement Summary
Frequency Distortion Reading
4.
Change the frequency to 1OOkHz.
5.
Verify that the distortion reading is 0.5% or less.
6.
Set the Model 3330 frequency to 2OOHz as follows:
A. Press the SETCTP key to enter the auxiliary setup
mode. The LED
blinks, and the unit displays the present fre­quency in them DISPLAY area.
B. Enter a frequency of 2OOHz.
l-4
above the FREQ (HZ) marking
FREQ lkH2
LEVEL 1vrms BIAS: OFF
4.
Set the switch to the open position, then note the DMM reading. Call this reading VI.
5. Set the switch to the closed position, then note the DMM reading. Call this reading Vz.
6. Compute the output impedance
from
VI and Vz as
follows: zour = 100
Wl/VZ -
1)
IQ1
7. Verify that the output impedance computed in step 6 is between 97S2 and 10322 inclusive (S%).
Model 3339
cable shield
Figure 23. Gmnections jbr Disfortion Measuremenfs
Performance Veri.ficafion
SECTION1
Figure l-4.
Model 1681 Test Leads
R = lOOR, 0.50/o, II2 w
Connecfions for Outpuf Impedance Tests
l-5
SECTION 1 Perjbrmance verifhtion
1.5.7 Internal Bias Voltage Accuracy
1. ConnecttheLumetertotheDMMusingtheModel
3324
cables (see Figure l-5). Note that connections are intended to measure the voltage between the H CURandLCURtermmals.
2. Select the 2VDC
3.
Set the LCZ meter operating modes as follows:
IAl DISPLAY: C
LFivELz5omvrms RANGE: AUTO BIAS INT/lXTz INT (rear panel switch)
B&e&*- ~~~~~~~~ ~~~~~~~~~~~~ ~~~~~~~~~ ~~~
4.
Verify that the DMM reading is between 1.9V and 21V inclusive (*%I.
5. Set the LCZ meter to BIAS OFF.
6. Select the 2OOmVDC
7.
Verify that the DMM reading is OV flOmV.
1.5.8
External DC Bias Voltage Range
1. Connect the LCZ meter to the DC power supply, ca­pacitor, and DMM, as shown in Figure l-6.
2. Select the DCV function and auto-ranging on the DMM.
3.
Set LCZ meter operating modes as follows: m DI!ZLAYz C
FREQ 12oHz
LEYELz!5omvrms
range on the DMM
range on the DMM.
BIAS lNT/EXTz EXT (rear panel switch) BIAS: OFF
4.
Set the unit to RANGE 2 as follows:
A. Measure the value of the lo@? capacitor in the
RANGE AUTO mode (DC BIAS OFF).
B. Verify that the Model 3330 is properly measur-
ing the capacitor.
C. Press the RANGE/AUTO key, and check that
the AUTO LED goes off. The unit is now set to RANGE 2.
5. Check the voltage
across
the capacitor with BIAS OFF,andwithBIASONanda35Vexternalbiasvolt­age SeBingon -the DC ~power 5q?plyWYmust~k available with BIAS ON).
6. Disconnect the DMM, and measure the capacitor value. Verify that the reading is stable to within fi digits of the center value (four digits of span).
WARNING Hazardous voltage (>3OW will be used in the following steps. Do not touch the capacitor until the test is complete, and the capacitor is discharged.
7.
Set the unit to BIAS OFF, and set the external DC power supply voltage to +4OV.
8. Set the LCZ meter to BIAS ON, and verify that the BIAS fuse does not blow.
9.
Set the unit to BIAS OFF, then turn off and discon­nect the external DC power supply.
Figure 1-S.
1-b
Yodel 3330
Model 3324 4-Terminal Test Leads
Model 197A DMM (Measure DCV)
I
Connections fir DC Bias Accuracy Tests
DMM Test Leads
I
-
Black (LCUR)
I
lhdd 3330 Front Panel
S&l
0
0
~
Pomona ’ 1
BNza
Adapter
Figure 1-6. Connections fDf Extemnl DC Bias Voltage Range Test
Model 7051-2 G?a%aI Cable
1 p
Pqbrnzance Vmjbtion
SECl7ON 1
1.6 MEASUREMENT ACCURACY TESTS
Measurement accuracy tests include:
l
R (resistance) measurement accuracy 0 C (capacitance> reading checks 0 L (inductance) reading checks
1.6.1
All resistance measurement accuracy tests should be per­formed at an ambient temperature of 23” f 1°C and at a relative humidity of 50% rt 20%. Capacitance and induc­tance reading checks can be performed at 23” + 5°C.
1.6.2
Table 1-3&s the resistance standards, capacitors, mduc-
tons, and additional equipment required to perform the measurement accuracy tests. The procedures for resk­tance measurement accuracy verification tests are based onusingthese standards. Listed capacitors and inductors
are to be used to perform capacitance and inductance
Environmental Conditions
Recommended Equipment
reading checks that are not based on instrument accuracy
tZp?dfications.
NOTE The Model 3330 makes all measurements based on the magnitude and phase of the im­pedance of the DLJT connected to the UN­KNOWN terminals. For that reason, verifica-
tion of resistance measurement accuracy is sufficient to guarantee the accuracy of capaci­tance and inductance measurements. The re­sistance standards values used are the same as those used for calibration. Capacitance and in-
ductance reading checks are included to ver­ify that the instrument properly displays ca­pacitance and inductance values.
1.6.3
Resistance standards used for the measurement accuracy tests should be calibrated at certain interva.ls so as to en­sure the accuracy of standards values. Standards accu­racy tolerances should be added to the stated measure­ment limits.
Resistance Standards Accuracy
l-7
SECTTON 1 Perfomnce Verification
1.6.4
Resistance Measurement Accuracy
Resistance accuracy measurements are made using the resistance standards listed in Table 1-3 and the test con­nections shown in Figure l-7.
NOTE
BesuretoconnecttheHandLterminakofthe resistance standards to the H and L terminals respectively of the LCZ meter, or inaccurate measurements may result. Do not handle the standards excessively, or the resulting tem­perature rise may affect their values.
Procedure:
1. Set the Model 3330 operating modes as follows:
FREQ: 4OHz
LEVEL: 1vIm.s SPEED: MED RANGE: AUTO
2 Conned the OPEN resistance standard to the instru-
ment, then press ZERO OPEN. Allow the instrument to complete the zero cycle before proceeding.
3. Connect the SHORT resistance standard to the in­strument, then press ZERO SHORT. Allow the in­strument to complete the zero cycle before proceed­ing.
4. Connect the lOO!J resistance standard to the instru­ment, and allow the reading to settle.
5. Verify that the I Z I and 0 readings are within the limits shown in Table l-4 and Table l-5 respectively.
6. Repeat steps 4 and 5 for the remaining standards val­ues listed in the table (1162 through loowZ), and ver­ify that all readings are within the required limits.
7. Repeat steps 2 through 6 for the remaining frequen­cies listed in the tables.
8. Change the LEVEL to 5OmVrms, then repeat steps 2 through 7 for the frequencies summarized in Table
l-6 and Table l-7.
Table l-3. Recommended Equipment for Measurement Accuracy Tests
Description Resistance standards
Capacitors Inductors User supplied Test Fixture*
*Future used to connect capacitors and inductors.
ManufachmrhBodel Values
Hewlett-Packard HP 16074.A Calibration Standard
User supplied
Keithley 3323
OPEN, SHORT, 1OOQ 1 l&I, 1OkQ lOOw1
lOOpF, O.Oljt.F, kl% loom, lOmH, z!zl%
l-8
Standard Resistance
Note : Connect L and H terminals properly as shown
Performance Vmficafion
SECTION1
Figure 1-7.
Table 1-4.
Resistance
Standard
Value
100a
1kLl 0.9980 to
lOu2 9.979 to
1ookQ 99.78 to
Connections for Resistance Accuracy Measuremenfs
Resistance Me asurement Accuracy Reading Limits ( 1 Z I 1 for 1Vrms Level
I Z I Reading Limits at Indicat
40
99.80 to
100.209
1.002okQ 1.0013m 1.001m l.OOlOkQ l.oOllkG!
10.021ksz 10.014m lO.Olw2 lO.OlOkQ 10.012kQ
100.~ 100.150ks2 100.12wz 100.100m 100.18kQ
l!ul
!
99.87 to
100.1322
0.9987
9.986 to
99.85 to
so0 lk 1 Sk
I
I
99.89to 99.9Oto lOOSlS2 100.10Q
to
0.9988 to 0.9990 to
9.988 to 9.990 to
99.88 to 99.90 to
I .
99.89to
100.1122
0.9989 to
9.988 to
99.82 to
!d Frequen
1Ok
99.87
to
100.13Q
0.9987 to
1.0013m
9.985 to
10.015kQ
’ 99.75to I 1ooB
!VtHZ)
*
100.17&2 l&.@S2
0.9983 to 0.9960 to
l.cm7kQ 1.004Om
9.980 to
9.960 to
10.020wz 10.04oki2
-
1OOk
99.30 to
100.7m
0.9930 to
1.0070m
’ 98.80 to
101.2okQ
l-9
SEClTONl
Pelyimla?lceVtification
. I
Table l-5.
Resistance
Standard
Value
looi
lK?
lOlc.0
1 loowz
NOTE: M easurements
40 120
o” f 0.12O 0” f 0.12” o” zk 0.13” 0” f 0.15”
Table 1-6.
Resistance
Standard
Value I-
lCHX2
40
99.70 to
100.3022
Resistance Measurement Accuracy Reading Limits (0) for 1Vrms Level
8 Reading Limik at Indicated Frecwencv (Hz)
soot lk
0” f 0.08” o” f 0.08” 0” z!z 0.w
0” * 0.10”
should be made at 239tl”C
Resistance
0” f 0.05” o” f o.c15° 0” f 0.05” 0” f o.cw
-L
Measurement Acwacy Reading L&nib ( 1 Z I) for ~Vz-ms Level
I Z I Reading Limik at Indicated Frequency !I&)
Il.20
99.80 to
100.208
500 lk Sk
99.82
loo.1852
o” * 0.03” o” f o.c13° 0” f 0.03” 0” f 0.w
to 99.85 to 99.80 to
100.1552
Sk 1Ok 20k 50k
0” f 0.08” 0” + o.lo” o” f 0.08O o” f 0.10” 00 * 0.06” o” 5 0.08” 0” f 0.08” 0” rt 0.15”
lok
99.77 to
100.2OQ 100.23sz 100.32Q
0” c 0.15” 0” * 0.25” 0” f 0.15” 0” f 0.25” 0” f 0.12” o” + 0.30” 0” f 0.20” 0” rf: 0.40”
20k
99.68 to
5Ok
98.80 to
101.20sz
look
0” i o.50° o” f 0.50”
0” z!z 0.60” 0” f o.80°
1OOk
98.40 to
101.6oi2
1kQ
1om
lOOk!
NOTE: limits shown do not inchxde resistance standards tolerances- Au measurements to be made at 2391°C
Value
KHZ?
1wZ
lOld2
1OOwZ
0.9970 to
1.0030~
9.963 to
lO.O37k!J
99.55 to
100.45kR
Table 1-7.
40 120 500
0”
Z!I 0.18O 0” + 0.18O 0” z!I 0.23” 0” + 02.P
0.9980 to
1.002oks2
9.975 to
10.02.5k!2
99.70 to 99.80 to
1003OkQ 100.2Oki2 100.16kQ 100.24kQ 100.32k.Q 100.4OkQ 101.8OkQ
Resistance Measurement Accuracy Reading Limits (0) for 5OVrms Level
O” f 0.12” 0’ + 0.09”
O” zk 0.12’ 0” i 0.09” o” F 0.15” 0” f 0.09” 0” f 0.18” 0” t- 0.12”
0.9982 to
1.0018kQ 1.0015&? 1.002OkQ 1.0023lcCI 1.0032kQ
9.982 to
10.018IcQ 10.016m 10.02OkQ 10.024w2 10.035kQ
0.9985 to 0.9980 to 0.9977 to
9.984 to 9.980 to 9.976 to
99.84 to 99.76 to 99.68
o” 32 0.06”
0” rk 0.06” 0” rtr 0.06”
0” 2 0.12O o” O” zk 0.12O 0” rfr 0.13”
0” * 0.12” 0” + 0.14O
to 99.60 to 98.20 to
zk 0.13” o” 4 0.180
0.9!%3 to
9.965 to
0” f 0.18” 0” Ik 020”
0.9880 to
1.012om
9.860 to
10.140kQ
0” + o.70° 0” z!z 0.70”
0” rtr 0.80”
0.9840 to
1.016OkR
9.800 to
10.200k!2
97.00 to
103.ooks2
o” 5 1.0”
0” T!I 1.0” 0” It 1.2’
NOTE: Readings should be taken at 239tPC
l-10
Perfomnce Vk$icatibn
SECTION I
1.6.5
Capacitance reading checks are made using the 1OOpF and O.Olp capacitors summarized in Table l-3.
RocedLuez
1. Set the Model 3330 operating modes as follows:
Capacitance Reading Checks
NOTE
The capacitance reading check procedure is
not based on instrument accuracy specifica­tions and is included only to show that the in­strument properly displays capacitance read­ings. As noted previously, verification of re­sistance measurement accuracy is sufficient to verify capacitance measurement accuracy.
m DISPLAYC a DISPLAY: D
CKTMODIZ SEX FREQ: 1kHz LEVEL: IVrms sirEEDzMED RANGE: AUTO
1.6.6
Inductance reading checks are made using the lOO#I and 1OmH inductors
Procedure:
1. Set the Model 3330 operating modes as follows:
Inductance Reading Checks
summarized in Table l-3.
NOTE The inductance reading check procedure is not based on instrument accuracy specifica­tions and is included only to show that the in­strument properly displays inductance read­ings. As noted previously, verification of re­sistance measurement accuracy is sufficient to verify inductance measurement accuracy.
m DISPLAY L m DISPLAY: Q
CKI’ MODE: SER FREQ 1kHz LEVEL: mms !SPEEDMED RANGE: AUTO
2. Connect the Model 3323 Direct Test Fixture to the unit (Figure l-81, but do not connect the capacitor to the test fixture at this time.
3. Short the test fixture terminals by connecting a bare wire between them. Press ZERO SHORT, and allow the instrument to complete the zero cycle. Remove the shorting wire after the zero cycle is completed.
4. Press ZERO OPEN, and allow the instrument to complete the zero cycle.
5. Connect the lOOpF, kl% capacitor to the test fixture terminak, and verify that the capacitance reading is within rt2% of 1OOpF (98pF to 102pFX
6. Connect the O-01@?, +I% capacitor to the test fixture terminals, and verify that the capacitance reading is &bi2% of 1OnF (9.8nF to 10.2nF.I.
2. Connect the Model 3323 Direct Test Fixture to the unit (Figure l-81, but do not connect the inductor to the test fixture at this time.
3. Short the test fixture terminals by connecting a bare wire between them. Press ZERO SHORT, and allow the instrument to complete the zero cycle. Remove the shorting wire after the zero cycle is completed.
4. Press ZERO OPEN, and allow the instrument to complete the zero cycle.
5. Connect the lOO$H, Itl% inductor to the test fixture exminak and verify that the inductance reading is
&thin & of 100~ (98jkH to 102@.
6. Connect the IOmH, kl% inductor to the test fixture
terminals, and verify that the inductance reading is within 22% of 1OmH (9.8mH to 10.2mH~.
l-11
SECTTOAT 1 PnJimnrmce verifif!ufion
3323 Test Fixture
Figure 1-8. Gmnections fM Cupucitunce and Inducfance Reading Checks
Capacitor or Inductor
l-12
SECTION 2
Principles of Operation
2.1 INTRODUCTION
This section discusses basic circuit operating principles for the Model 3330 LCZ Meter.
2.2 BLOCK DIAGRAMS
Figure 2-1 shows a block diagram of the measuring sys­tem, and Figure 2-2 is a hardware block diagram.
2.3 CURRENT AND VOLTAGE DETECTION
The instrument drives the device under test (DUTI with a signal from the built-in oscillator, and it detects the cur­rent I flowing through the DUT and the voltage the DUT. The current is converted to a voltage EI by the operational amplifier and the reference resistor RR.
EV
across
Both AC signals by the A/D converter. The microprocessor then multi­plies these signals by the reference sine wave and inte­grates the resultant signal digitally to obtain the voltage and current vectors (magnitude and phase) with respect to the~referenceoscilktor siQr&Using~th.is method, it is possible to measure only the fundamental oscillator fre­quency component, and noise.
EV
and Er are converted into digital data
minimkhg the effects of distortion
2.4 IMPEDANCE CALCULATION
Impedance is calcuked by dividing the voltage vector by the current vector. As a result, impedance is expressed
as the ratio of the magnitudes and the differences in
phase between the two vectors. Any current-to-voltage
conversion errors are corrected based on factors deter­mined when the instrument is calibrated. In addition, true impedance (Z=Rs + JX) is obtained by correcting re­sidual impedance Zss and floating admittance YPP, and the instrument automatically calculates main and auxil­iary parameters from Rs and X.
2-l
SECTION2 Principles
of
Operation
Ev
Display
*
n
GPIB
Figure 2-1.
Measuring System Block Diagmm
2-2
SECTTON
Principles 0fOperafion
-
i Oscillator
$z+ I
- I
!
L
D Y
I
L POT
I I
---e-e--
-w--s
r
I I)
I
S&
a
I
---------1
EXT
----w---
IN
I
Figure 2-2.
.
i I
I IVDetector
I--------------d
Hardware Block Diagram
i
:.;;::,gg?b
zffrl
Am f
Interface
I
I
1 Power Supply 1
I
I I
Key Soard Display
2-3
2.5 OSCILLATOR
Theosciuator~i~e2-3)isadigitaldirectsynthesistn?e freqyuency synthesizer, which uses a quartz oscillator to generate the reference frequency. The quark oscihtor is used to ensure that the synthesizer output remains sta-
ble.
The synthesizer output, which is a digital ramp signal, is
converted into a sine wave by the sine ROM and is then
crystal 4MHz
converted into an analog signal by the D/A converter.
Since the D/A converter output includes harmonics of
the desired fundamental frequency, the D/A converter output signal is routed through the low-pass filter to ob­tain a pure sine wave.
TheoutputoftheosciUatortifedtotheHCURterxnhlto be applied to the
DUT
along with the DC bias voltage.
The equivalent output impedance is approximately
lOOS2.
fc
I
Frequency - ) SINE __) D/A - Var- --) An -
Synthesizer - ROM ccnv.
t
l
Frequency
l
Runmop
Phase
- Sampling Pulse
w Generator
c
Figure 2-3. Oscillafor Block Diagram
-/z/i
1
LPF
-
INT/EXr
Bias Voltage -
GND
11
II
-
SW-
ON/OFF
H CUR (To DUT)
0
z
2-4
Principks
SECTION2
of
Operation
2.6 CURRENT-TO-VOLTAGE CONVERTER
ThesignalcurrentfromtheDUI’isconvertedtoavoltage before measurement, a rent-to-voltage converter (Figure 2-4). The converter is made up of a high-gain operational amplifier and a refer­ence resistor l&, which forms the feedbackloop for the op
=nP-
Since the operational amplifier has very high gain, its in­verting input is at virtual ground potentiak Conse­quently,thecurrentflowingthroughY~canbeneglected, and the signal current I has the same magnitude as the current flowing through RX. As a result, the voltage across I& which is the same as the output voltage Vour, is simply Ilk Note that the value of RR can be changed ac­cording to the value of the DUT being measured in order to increase the dynamic range of the instn.unenL
At higher frequencies, the gain of the operational ampli­fier decreases, and the value of the floating admittance
(which is made up primarily of capacitance at higher frf+
function p&onned
by the cur-
quencies) increases. Consequently, the current to ground increases substantially, increasing the measurement er­ror. The error term is proportional to the product of RR and the square of the frequency.
2.7 ANALYZER
To eliminate the effects of a common-mode signal, the
voltages CEv and l3 across theDUT and Rx are amplified
by a differential amplikr and then routed to the A/D
converter through a signal conditioner consisting of am­plifiers and a low-pass filter (Figure 2-5). The low-pass
filter attenuates any unwanted frequency components to
prevent possible measurement errors.
The variable-gain amplifiers (AMI’ xl and AMP xS) are used to increase the resolution of the X-bit A/D con-
verter when the voltage and current are small. The gain­phase characteristics are measured at power-on and in zero-measurement (OPEN and SHORT) modes, and the compensating factors are applied to subsequent imped­ance measurements to ensure that amptier characteris­tics do not affect measurement accuracy.
GND
Figure 2-4. Cumnf-to-Voltage Conv&m
Device under test Reference resistor
Yp : OP AMP : Operational amplifier
1 eon, 1 k&2,1 OkQ, 5okQ
Floating admittance
2-5
SECTION2
Principles
of
Operation
Ev
El
Figure 2-S.
e
DiiAMP
*
A?Udyzet
AMP
*
Xl - LPF - S/H - A/D ­X8
fc = 5ookHz
3okHz
To CPU
16Bii
2-6
SECTION 3
Service Information
3.1 lNTRODUCTlON
This section contains information on fuse replacement,
instrument repair, and replacement parts for the Model
3330.
3.2 FUSE REPLACEMENT
The following paragraphs discuss replacement of the line fuse and external bias fuse.
WARNING
Disconnect the line cord and all other equip-
ment from the instrument
fuses.
CAUTION
Using the wrong fuse type may result in in-
stnunent damage.
3.2.1
The line fuse, which is located on the the power line input from excessive current. To replace the fuse, first unplug the line cord, then pry out the fuse holder from the bottom of the line power receptacle. Re-
Line Fuse
before replacing
rear
panel, protects
place the fuse only with the type recommended in Table
3-l.
.
Table 3-2
Line Voltage Descrktion I
lO0V/12UV
22OV/24OV
3.2.2
The external bias fuse protects the instrument from ex-
cessive current supplied by an external DC bias source. To replace this fuse, simply unscrew the fuse holder, then replace with the following type: O-IA, WOV, fast blow,
5lnmx2t.lnn-t.
External Bias Fuse
Recommended Line Fuses
1/2A, WOV, slow blow, 5mm x 20mm I/4A, 25OV, slow blow, 5mm x 2Lhnm
3.3 CALIBRATION
Model 3330 &ration requires a special computer pro-
gram, which is included with a calibration kit along with
complete calibration instructions. Calibration kits are
available free of charge from the factory. Please call
‘I-800-552-1115 to obtain your calibration kit.
3-l
SECTION3 Seroice Information
3.4 FAN FILTER CLEANING
The fan filter should be cleaned at least once every three months whentheunit is operatedina cleanenvironment, or at least once a month when the unit is operated in a dirty environment. The fan filter element should be cleaned as follows:
1. Turn off instrument power, and disconnect the line cord.
2.
Pry out the filter cover on the rear panel.
3.
Remove the filter element.
4. Soak the filter element in a solution of mild detergent and water until clean.
5. Rinse the filter element thoroughly in clean water, then allow the filter to dry thoroughly before re­placement.
6. When the filter has dried completely, install the filter and cover.
CAUTION
The instrument should not be operated without the filter in place.
3.5 REPAIR
WARNING Disconnect the line cord and alI other equip­ment from the Model 3330 before removing the covers.
CAUTION A conductive coating is applied to the inner surfaces of the covers. Be careful not to scratch the coating when removing covers. Also be careful not to peel off the plastic film on the front panel.
Place the instrument upside down on a soft cloth or
I.
rubber mat to avoid scratching the top cover.
2.
Remove the four screws that secure the bottom
cover, then remove the cover.
Place the
3.
Remove the top cover by separating it from the chas-
4.
Sk
instrument right side up.
3.5.3 Battery Replacement
The battery, which backs up setup and calibration con­stants RAM, should last for at least three years. If you no­tice the instrument no longer stores setups, the battery should be replaced. (A calibration error during the self­test may also indicate a discharged battery.) Follow the steps below to replace the battery.
3.5.1 Factory Service
.If the Model 3330 is still under warranty, it is recom-
mended that the unit be returned to the factory or a Keithley authorized repair facility for calibration or re­pair. When returning the unit for service, include the fol-
lowingz
l
Call the Instruments Division Repair Department at l-800-552-1115 for a Return Material Authorization 0 number.
l
Write the RMA number and the following on the ship-
ping label: ATTENTION REPAIR DEPARTMENT.
l
Complete the service form at the back of this manual.
l
Advise as to the warranty status of the instrument.
3.5.2
The covers must be removed for repair. Follow the steps below to remove the covers using Figure 3-l as a guide.
Cover Removal
CAUTION
Many parts on the internal circuit boards are static sensitive. To avoid possible damage, perform any repair operations only at a erly grounded work station, and use only grounded-tip soldering irons and anti-static de-soldering tools.
prop-
Replacement of lithium batteries is normally a safe proce­dure as long as the following safety precautions are fol­lowed:
WARNING The precautions below must be followed to avoid possible personal injury.
1. Wear safety glasses or goggles when working with lithium batteries.
2 Do not short the battery terminals to-
gether.
3. Do not incinerate or otherwise expose
lithium batteries to excessive heat (>6OOC).
3-2
SECTIONS
semice Infornzation
Remove
Screw Screw
t t
1. Remove Screws 2. Remove Bottom Cover
Figure 3-Z.
4. Keep lithium batteries away from all
5. Do not attempt to charge lithium batter-
6. Observe proper polarity when install-
covtT~ovu1
_. --
liquids.
ies. ing lithium batteries.
NOTE
Calibration constants are stored in battery backed up RAM. Model 3330 calibration will be required if the battery becomes fully dis-
charged, or if you remove the battery.
1. Disconnect the line cord and all other instruments
from the
Model 3330.
4
t
t
3. Remove Top Cover
Remove
t t
2. Remove the top and bottom covers.
3. Note the positions of the various cables connected to the circuit board, then discomwct all cables from the
board.
4. Remove the screws that secure the circuit board to the chassis.
5. Remove the control board.
6. Unsolder the battery terminals, and remove the bat­tery.
7. Install a new battery, taking care to observe polarity.
8. Install the circuit board, and connect all cables to the board.
9. Replace the covers.
10. Calibrate the instrument after replacing the battery (see paragraph 3.3).
33
SECTiON sf??vice Info?Ynation
3.5.4 Operation Check Procedure
1. Connect the instrument to an appropriate power source using the supplied power cord.
2. Fress in on the front panel POWER switch to turn on the power.
3. Verify that the instrument displays the ROM version number on them DISPLAY area.
4. The instrument will then .perform internal circuit checks and enter the self-calibration mode. During self-calibration, XAL” is displayed on them DIS-
PLAY, and a decrementing number is displayed on them DISPLAY section.
5. The number on the m DISPLAY section decre­ments; the self-calibratiofi cycle ends when this
number reaches zero.
Table 3-Z Self-calibration Errors
6. If an error occurs, an appropriate message will be displayed (see Table 3-2). Turn the instrument off for
three seconds, then turn power back on to see if the error clears. If the error persists and cannot be cleared, the instrument requires the indicated serv­ice.
3.5.5
Table 3-3 lem for the various operation check item problems (see paragraph 3.5.4). Table 3-4 summ various measurement signal problems. (See Section 1 for measurement signal measurements.)
Repair Summary
summarizes the most
likely source of the prob-
arizes actions to take for
3-4
Table 3-3. Operation Check Problem Summary
Problem
Non-resettable error (except IEEFE 22222) Resettable error’
lEFXE22222enor Calibration error Front panel keys and/or LEDs do not function Handler interface does
*If the calibration error persists, the intend battery may r&@re repkement.
not function
Action
Replace RAM, ROM, or circuit board WI?-10420). Reset error, and proceed with’operation.
Repeat test, calibrate unit if problem persists.* Replace main board @II?-10420). Replace front panel circuit board. Replace handler interface board WI?-21127).
Table 3-4. Measurement Signal Problem Summary
SECTION 3
Senn’ce
Informa fion
Problem Frequency accuracy Measurement signal level
Measurement signal distortion
Output impedance accuracy Internal DC bias accuracy External DC bias voltage range
3.6 REPLACEABLE PARTS
3.6.1
Table 3-5 summariz
parts, and Figure 3-2 shows the location of mechanical P*.
Parts List
es available Model 3330 replacement
Action Replace main board (IQ?-10420). Perform calibration (replace main
board if calibration is not effective). Replace main board. Replace main board. Replace main board. Replace main board.
3.6.2
Ordering Parts
To order a part, or to obtain information on replacement
parts, contact your Keithley representative or the factory. When ordering parts, include the following information:
l
Instrument model number
l
Instrument serial number
l
Keithley part number
l
Part description
3-5
SECTION 3 Semite
Informaiion
Table 3-5. Model 3330 Replaceable Parts
Description
Part Number Quantity
FRONT PANEL SECTION
Fro& panel
400-12310-00 506-005X-00
Power switch (Front)
Button Switch holder 1
BNC connector (BNC137)
Ground terminal
332-19133-00 359-03554-00 526-12996-00 310-00169-00
330-05346-00
REAR PANEL SrjCTlON
Rear panel
400-12328-00 1
Noise filter (inlet) 240-03212-00 1
Ground terminal 330-05389-00 1 Voltage selection switch 332-50057-00 1 Fan @C12V, 60 x 6Omm) Air filter
300-00785-00
459-00205-00 1
Flat head screw (M3x4Omm) 600-01241-00 4 Grommet (small) 546-00138-00 1 BNC connector (BNC137) 310-00169-00 1 Fuse holder 302-04045-00 1 Hex. stud (L,=25) 606-00250-00 2
CHASSIS SECTION
1' 1
1 1 4 1
1
ChZiSSiS
Hex. stud (L=8) 606-00080-00
Power switch
516-07107-00 1
6
332-19141-00 1 Switch holder 2 526-13003-00 1 Flexible wire 332-19150-00 1
Power transformer (D: 432768) 244-10870-00 1
BOARD ASSEMBLY
Nr-10457(hMN) 080-33072-00 1 NP-21101A-1 (KEY) 080-33099-00 NP-211OlA-2 (BIAS) NP-21127 (HANDLER I/F)
* The front panel has two code numbers, and it is necessary to specify these two
numbers when the front panel is ordered.
** These two boards combined into one set.
080-33099-00 l** 080-33510-00 1
1**
3-6
SECZ’TON3
Service Information
Figure 3-2.
Model 3330 Exploded View
3-7
APPENDIX A
Model 3330 Specifications
A.1 MEASUREMENT PARAMETERS
Main Parameters (Display A) and Range
‘L: Inductance, 0.ln.H to 19.999kH C: Capacitance, O.OOlpF to 19999mF R: Resiitance, O.lmR to 19.999MR
I Zl : Magnitude of impedance, O.lmR to 19.999Mn
AUTO: Automatically selects main parameters, sub-parameters, and equivalent circuit.
Sub-parameters (Display B) and Range
Q: Quality factor, 0.0001 to 19999 D: Dissipation factor, 0.0001 to 19999 ESR Equivalent series resistance, O.lmR to 19.999MR
C: Parallel conductance, 0.0Oll1S to 19999S
X: Series reactance, O&n?.2 to 19.999MR
8: Phase angle of impedance, -180.00° to +179.99’ V: Voltage monitor (RMS voltage across device) O.OmV to 1999Vrms I: Current monitor (RMS current through device), O.OOi.tArms to
19.99mArms
Measurement resolution will vary depending on frequency, measure­ment range, and impedance phase angle.
Automatic Parameter Selection
Phase Display A +lZO” to +60” L +30” to -30”
-120” to -60° C others
R
IZI 0
Display B
Q Q
D
Autoranging Time: Approximately equal to measurement time Stabilization Time After Range Change: 0.2 - 4.0s Stabilization Tie After Frequency Change: 0.15 - 4.0s Bias Stabilization Tie: (4 + 0.015C)s
where: C = capacitance of DUT (m @)
Equivalent Circuits
AUTO: Automatic selection SEl? Series PAR: Parallel
Automatic Equivalent Circuit Selection
Equivalent
Display A
L,C,Ror IZI
LorC(IZI Ilkf2) Q,D,e,VorI R(620)
IZI Q,D,&VorI series L,C,Ror IZI G LorC(IZI >lm) Q,D,e,VorI Parallel R@<O)
Display B ESRorX
QD,O,VorI Series
Q,D,e,VorI Parallel
circuit Series Series
Parallel
Displayed Resolution
41/2 digits (19999 max counts)
D, Q maximum resolution: 0.0001 0 resolution: 0.01’ V resolution: O.lmV I resolution:
1pA (when reference resistance is lOOn)
0.1l1A (when reference resistance is 1kR) O.Ol@ (when reference resistance is 1Okn or 5OkS2)
Deviation Measurement
A: Deviation of main parameter (range of deviation is at least flOO% of the measurement range)
A% % deviation display of main parameter (display range i199.99%)
Note: Deviation and % deviation of sub-parameters cannot be dis­played.
Execution Times
Measurement Tie m-488)
FAST: 65msec (typ) MFD: 155msec (typ) SLOW 485msec (typ) Note: lkS2 impedance, 1kHz frequency and one shot trigger.
Specifications subject to change without notice.
Note: Reference resistance is measurement range dependent.
Accuracy of V, I
Accuracy of V, I: zk(2% + I Z I accuracy)
Accuracy of I Z I and 0 (1 year 18°-280C)”
For 0.2(1. < I Z I < 2OMR and 0.9-l.lV test level, see Table A-l. For 0.2D i; I Z I 5 2OMn and 50mV test level, see Table A-2. For I Z I < 0.252 and 1V test level, see Table A-3. For I Z I >2OM!G? and 1V test level, see Table A-4.
When properly zero corrected and using Model 3323A test fixture.
Table A-l. Impedance Magnitude Accuracy (%I and Phase Accuracy (“1
Test Level= OSl.lVrms, Speed = Med or Slow
Frequency (Hz)
IZI (RI
10Mr IZI c2OM
SMS IZI <lOM
21111-s IZI c5h4
lIvIs IZI <2M
2OOks IZI <lM
2OkS IZI <2OOk
2kS IZI <2Ok
10s IZI <2k
2s IZI <lO
1s IZI c2 052%
05s IZI <I 1.0%
02s IZI <0.5 21%
40.”
90 l30
43%
2.2s” l.!?
2.2% I 13%
13O 0.90”
1.10% 0.75%
0.68” 0.450
034% 036%
033O 02P
037% 025%
0.22O 0.150
t
0.22% 0.15%
0.15” 0.100
0.21% 0.14%
0.13O 0.09”
0.20% 0.13%
0.12” 0.08”
0.37% O.ZF 0x9
t
0.33O OXP
0.68” 0.45”
13” 0.90”
I
I
I
I
MO-
3.0%
O.zs%
035%
0.70%
1.4%
MO-
900
05% 03% 030°
030% 0.20%
o.ls” 0.100 0.150
020% 0.15%
0.12” 0.09”
~
0.12% 0.10%
0.06” 0.04O 0.08’
lk
I I
o.20° 030”
I I
l.lk-
5.Ok
05%
030%
0.20%
0.12O
0.18%
5.lk ­1Ok
3.5% 2o”
1.8%
l.1°
0.9%
0.60”
0.40% o.20°
0.27%
0.16”
023%
0.15”
0.15%
0.08”
0.13%
0.10”
0.32% o.20°
O.sO%
0.34Y
0.80% 050”
1.2%
0.80”
1.0% 3.5%
0.60” 200 3.0”
O.so%
0300
03.5% o.20° 0.60”
t
0.70% 1.0% 20% OAOO 0.60”
1.2% 1.7% 3.3%
0.70” 1.0” 20”
1.6% 3.0%
1.00
1.0% 20%
5.0%
20”
12O
CL0
Notes:
1. For ST-lST, or 28”C-40°C, multiply the I Z I accuracy by 1.4, and the phase accuracy by 1.8. 2 When measurement speed is FAST, multiply the accuracies by 20.
3. For test levels other than 0.9-l.lVrms or 5OmVrm.s see Accuracy Notes.
Table A-2. Impedance Magnitude Accuracy (%I and Phase Accuracy lo)
Level = 5OmVims, Speed = Med
or
Slow
2Ms IZI <5M 3.0% 20%
1MS IZI <ZM 1.5%
ZOOkS IZI <lM 0.75%
2Okr IZI <200k 0.45% 030% 0.20% 0.16%
2kS IZI <2Ok 03%
105 IZI c2k
2s IZI <lO 0.75%
1s IZI <2 1.5%
0.5s IZI <I 27% 1.8%
0.2s IZI co.5 5.55% 3.7% 26% 20%
Notes:
1. For 5”C-18T, or W’C-40°C, multiply the I Z I by 20, and the ph!se accuracy by 20.
2 When measurement speed is fast, multiply the accuracies by 20.
3. Accuracy is not guaranteed in the following ranges: I Z I z= 2OMQ I Z I c 0.252
4. For test ieveis other than O-9-LlVrms or 5OmVnns see Accuracy Notes.
1.80
0.90”
0.45-J
OCP
0.23O 0.156 0.w 0.06”
030% 0.20%
0.18” 0.12O
0.45” 03 o.20°
0.90
1.650 1.10
3.30
1.2O 0.80°
1.0% 0.60%
0.60”
050%
0300 0.25”
O.lV 0.12O
025% 0.18% 0.16%
050%
1.0%
0.600 0.400 o.30°
22” 15” 1-Y
12%
035” 0.w
0.40% 030%
0.18%
0.09”
035%
0.60%
1.2% o.70°
0.90% 1.2%
0.60°
0.40%
0.18“
0.08” 0.14”
0.15% 020% 0.23%
0.06”
025% 035%
0.140 o.20° 030°
050%
1.0%
0.60° o.70° 0.90” l.1° 6.0”
0.8”
0.60% 0.80% 035O 0.50”
035% 0.40%
0.20” 0.2Y o.40°
024% 0.32%
0.20% 0.24% 0.35% 1.4% 20%
0.12O 0.14”
0.12O 0.13”
050% 0.70%
0.60% 0.80%
o.40° l.2% 15%
26% 29% 3.4% 21%
1Y 1.7O
1.6% 3.5% l.o”
0.18O OLD
050”
2o”
1.6%
0.90” 7.0°
0.70% 6.0%
0.40%
OXP om
0.32%
0.18”
0.40”
1.1%
0.70” 3.6” 5.0”
1.8%
20”
25% 30%
150 18”
12%
3.6” 4.0”
1.8%
1.00 Iso
1.2%
0.70” 1.0”
3.4% 20” 23”
6.0% 8.0%
10% 14%
13O 16”
14%
8.0°
7.0%
3.0%
1.2O
1.6%
4.0%
8.5”
28%
Table A-3. Accuracy of I Z I and 0 for I Z I cO.2Q
I Z I Accuracy: z!z(% reading + R) shown. 8 Accuracy: (0 Accuracy for 0.X I Z I co.5 in Table A-l) x (0.2Q/ I Z I ) When SPEED=FAST, multiply accuracy by 2 For 5”-18°C or W-40°C, multiply accuracy by 2
Table A-4. Accuracy of I Z I and 0 for I Z I 220MQ
I Z I Accuracy: Specified by the + deviation (S) of admittance I Y I shown.
6 Accuracy: (e Accuracy for 1Om I Z I <2OM in Table A-l x ( I Z I /2OMQ). When SPEXD=FAST, multiply accuracy by 2 For 5”-18°C or 28”-4O”C, multiply accuracy by 2
Accuracy Notes
1. When a measurement is made interaction with line frequency.
2
Tables A-l through A-4show the worst case value in each impedance range. A more precise value for accuracy may be obtained by interpolation.
3.
Inordertodetenninetheimpedancemagnitudeaccuracy(A,)andimpedancephaseaccuracy(Ad) atmeasurementsignallwels (LV) other than5OmV or 0.9V - l.lV, use one of the following equations:
at line frequency or at twice line frequency, the measured value may deviate beyond the accuracy range due to
. In this case, use 5OI-h or 1OOHz for a 6OHz line and 6OHz or 12OHz for a 5OHz line.
Measurement
Signal Level
0
From To
1OmV 49mV QOMnand ?0.2Q
51mV 899mV
51mV 899mV QOMQand rO.2Q
5lmV 899mV
where: LV = Test level voltage
= Impedance Magnitude Accuracy (%) from Table A-l
An A, = Impedance Phase Accuracy (O) from Table A-l
= Impedance Magnitude Accuracy (%) from Table A-2
42 A, = Impedance Phase Accuracy (“) from Table A-2
& = Impedance Magnitude Accuracy (%) from Table A-3 B, = Impedance Magnitude offset @IQ) from Table A-3
A, = Impedance Magnitude Accuracy (96) from Table A-4
A, = Impedance Phase Accuracy (“) from Table A-4
AZ5 = Impedance Magnitude Accuracy for 51mV S LV S 899mV and I Z I c 0.2Q
Measured Impedance Magnitude
IZI
22OMQ
corn
Impedance Magnitude
Accuracy [%I
(4)
Impedance
Phase
Accuracy I”1
(4)
A,(%)
2k !5k
i .;.
; .’
-:.
,’
:*.
, .
: I.,‘! -
\
I
‘. : ,* r,
s’ i
** :I
;<‘:
:.
*’
;. :
: ,, : *, j
*.* ,:*
I illllil,
‘. ,‘f
a’.
‘.
‘..,’ i _
; *._ it’ =
,*.
i _
‘\ i
‘.i, - \q
: .
: j.
;,* ­2 z
,‘i _
,?. i _
‘-4
; j‘,
10k 2Ok !SOk 1OOk
+
.
inductance L
Impedance t
Frequency f ‘(Hz)
Notes: Use this chart to determine the impedance magnitude of an
inductor or capacitor at a partia~lar frequency. For example,
a 1 H inductor at 1 OkHz and a 1 pF capacitor at 1 kHz are shown
on the diagram.
lH@lOkHz=63kQ
1pF@lkHz=16O~
Figure A-l. Convmion Diagram
Examples of Determining Accuracy
Example 1: Component = 33m resistor
Test Frequency = 1OkHz Test Level = 1V rms Temperature = 18’XWC Speed = Med or Slow
1. Find the accuracy values corresponding to 33m and 1OkHz on Table A-l. Record the impedance magnitude accuracy (0.25%) and imped­ance phase accuracy (0.15”).
2 If the ambient temperature is 5°C - 18OC or 28°C - 4O”C, multiply the
impedance magnitude accuracy by 1.4 and the impedance phase accuracy by 1.8.
3. If measurement speed is set to FAST, multiply the impedance magni­tude accuracy by 20 and the impedance phase accuracy by 20.
4. Resistance accuracy is approximately equal to the impedance magni-
tude accuracy if Q s 0.1.
5. If Q > 0.1, see example 4.
Example 2: Component = 1OpF capacitor
Test Frequency = 1kHz Test Level = 5OmV Temperature = 18”-WC
Speed = Med or Slow
1. Determine the impedance of the lOt.tF capacitor at 1kHz by referring to Figure A-l or by solving the following equation:
1
2Rx1kHzx10pF
2 Find the accuracy values corresponding to 16R at 1kHz on Table A-2
Record the impedance magnitude accuracy (0.15%) and impedance phase accuracy (0.060).
3. If the ambient temperature is 5OC - 18°C or WC - 40°C, multiply the impedance magnitude accuracy by 1.4 and the impedance phase accuracy by 1.8.
4. If measurement speed is set to FAST, multiply the impedance magni­tude accuracy by 20 and the impedance phase accuracy by 20.
5. If D s 0.1, the accuracy of the capacitance measurement accuracy (CJ is related to the impedance magnitude accuracy (ZJ by the followmg equation:
= 16R
1. Determine the impedance magnitude accuracy of the 68OuH inductor at 1OOkHz by referring to Figure A-l or by solving the following equation:
2 Fmdtheaccuracyvaluescorrespondingto427SZatlOOkHzonTableA-
1. Record the impedance magnitude accuracy phase accuracy (0.5’).
3. If the ambient temperature is 5°C - 18°C or 28°C - 40°C, multiply the impedance magnitude accuracy by 1.4 and the impedance phase accuracy by 1.8.
4. If measurement speed is set to FAST, multiply the impedance magni­tude accuracy by 20 and the impedance phase accuracy by 20.
5. If Q > 10 the inductance measurement accuracy is approximately equal to the impedance magnitude accuracy.
6. If Q < 10, see example 4.
Example 4: Determine precision of parameters other than I Z I and 8 at
any frequency.
1. Fit,
measure I Z
parameters by applying the following equations: %WM
IZl-
where:
f = frequency (Hz). C, L,r = series equivalent circuit variables. Cr, Lp = parallel equivalent circuit variables.
2 Determine the impedance magnitude accuracy (A,) and impedance
phase accuracy (AJ of table (Table A-l, A-2, A-3 or A-4).
,3. Determine the maximum and minimum value by using the following
equations: Z-= IZI-x(l+Ar)
z,, = I z
8 e
=arctanQ = = i/(2dcs
=27tfr+ine
= sin 0/(2rfCJ
mm=%las+Ae
=emols-Ao
mh
I and 8. Or, calculate them from other measured
Q =1/D
2dr.,+n e
I
lllpu x (I- 4)
sin e)
I ZmLU
= 2xfLJESR = 1 /(2dCs ESR) = (2xfC,)/G
= 1/(2~fL,G)
I
and Bmur by referring to the appropriate
(0.70/q)
and impedance
c,r 3%.
l-Zxc
In this example Z- = 0.1% and C, = 0.1001%.
6. If D > 0.1, see example 4.
Example 3: Component = 68OpH
Test Frequency = 1OOkHz Test Level = 1V rms Temperature = 18”~WC Speed = Med or Slow
4. Determine the maximum and minimum value of the parameter of interest by substituting the values found in step 3 into one of the following equations. There will be four combinations:
up =
R, =
izic0se
ESR =
IZI case
= izi
sine
; =X/2ltf
= -l/lxfx
cs Q
=itanei
5. Accuracy is found by determining the largest deviation from the measured values.
Izihse
G
=c0se/izi
B =sine/IZI
=-1/2&B
L, c, =B/2xf
D =i/imei
A.2 MEASUREMENT SIGNAL
Frequency
Range:
4oHz-lxxk lOH2 steps 160,200,25OHz 3ooHz-9.9kH.z lOOH steps lOkI-Iz-1cKkHz 1kI-k steps Accuracy: fo.O05%
Output Impedance: 100~ (typ)
Signal Level
Range: 1OmV~l.1OOVrms: 1mV steps AmUacy: zt(3% + 1mV) for lkH2 jz(4% + 1mV) for 4OHz-2OkHz z!c(5% + 1mV) for 21kHz-lOOkHa)
Bias Voltage
Internal: 0 or +2VDC (&5%) Extemal:oto-
(voltage when drive terminal HCUR is open)
Output characteristics:
Type: TTL negative logic Maximum TTL load: 10 standard TTL Maximum output current: 48mA (sink, output voltage nV)
Input signals:
TRIG Measurement start trigger (puke width ~lOO.us) LOCK: Panel operation prohibited
Input characteristics
Low level input voltage: -1.5 to cO.8V High level input voltage: +2.4V to 30V (TRIG), +3.5V to 30V (LOCK) Low level input current (Approximation)
TRIG -033mA LOCK: -3mA
Handler Interface Ground: isolated from chassis ground. Max voltage
from chassis k42VDC.
Beeper (two functions, dip switch selectable):
Beeper on/off: Enables beeper function. Beeper Mode:
1. Beep oniy for NO GO 2 4KHz beep for GO and 2kHz beep for NO GO.
Note: GOrefers tocomparatorbinsl-19,and NOGOrefers tocompara­tor bin 0.
A.3 COMPARATOR/BINNING FUNCTIONS
Number of bins 20. The comparator function can sort on the main parameters (It L, C, or Z)
Into bins l-19. Also, the comparator function can sort on the sub-para­meter into bin 0 (Q, D, ESR G or X).
A.4 FRONT PANEL SET-UP MEMORY
Number of front panel set-ups: 10. Front panel set-up contents: All front panel parameters except bias con-
trol.
Battery Iif? At least 3 years if storage temperhue is less than 4O“C.
A.5 HANDLER INTERFACE
Connector: 36-pin Centronics type (Cinch 5730360) Output signals:
BIN O-11: A-NC: Main parameter failure B-NG: Sub-parameter failure STROBE: BUSY:
Bin judgment signals
Judgment completion pulse (pulse width X5ms) Measurement in progress flag
A.6 IEEE-488 BUS IMPLEMENTATION
Multiline Commands DCL, SDC, GET, GTL, LINT, UNL, SPE, SPD UniIine Commands: lFC, REN, EOI, SRQ, ATN Interface Functions: SHl, AI-Ii, T5, L4, SRl, RL2, PPO, DCl, DTI, CO.
A.7 GENERAL
Line Voltage: 100,120,220 or 240510% VAC (external switch selectable) Bnvimnmenb Operating: 0”-4O”C, lo-90% RI-I (non-condensing)
Storage: -loo-50°C, lo-80% RH (non-condensing)
Dimensions, Weight: 132.5mm high x 216mm wide x 350mm deep (5 ‘/,
in. x 8 Yr in. x 13 ‘/, in.) Net weigth 3.7kg (8.1 Ibs.) (instrument only,
exduding accessories). Warm-up: 30 minutes. Front Panel Connectors: 4 BNC connectors and a five way biding post. Rear Panel Connectors:
Handler Interface
External Bias: BNC
IEEE Connector: Floating Display: Two 4 ‘/2 digit displays for main and sub-parameters. Trigger Mode: Automatic (continuous) and manual. Trigger Delay Time: 0-199.99s
Calibration Cycle: 1 year
lOhmz-
1MQ -z-
looks2 z-
lOks2 :-
lkf27
loon z-
loR?-
8.
c’
(.
*.c’
Y
\ .
‘\
,’
’ ‘.
I’
‘\
‘.
,
,’
‘\
,’
\
,
,’
‘.
,’
.
1R -y
Impedance Z
,
#’
:<
--.
Frequency f (Hz)
Note : 1. For 5%18%, or 28%40%, muifipiy the IZl accuracy by
1.4,andthephaseaccuracyby1.8.
2. When measurement speed is FAST, double the accuracy.
Level 3 0.9%1 .lV rms
Speed E Medium or Slow
lOhK? :-
lMQ~-
loom p-
lOks2 7’
IkQ:-
loof2~-
1on 2-
ia?-
capadtaflce c ’
ImpedanceZ
I ,,,1111, 1 ,I,““,
40
100 200 500 lk 2k
Frequency f (Hz)
Note : 1. For 5%-l 8%, or 28%40°C. multiply the pi accuracy by
2.0,
and the phase accuracy by 2.0.
2. When measurement speed is FAST, double the accuracy.
3.
Accuraoy is not guaranteed in the following ranges : IZl>2OMQ, IZ]c.2Q.
Level = 50mV rms
I I 8 , I II,,
5k 10k 20k
Speed 3~ Medium or slow
. ,
, I I,““,
50k 1OOk
hlduotance L
Index
Analyzer,Z-5 *
B
Battery Replacement, 3-2 Block Diagram, 2-l
C
Cal&ration, 3-l Capacitance Reading Checks, l-11 Cover Removal 3-2 Current and Voltage l?e&ction, 2-1 Current-to-Voltage Converter, 2-5
E
Environmental Conditions, l-2,1-7 JtkttXdBiiFuse,3-1
ExtemaI DC Bias Voltage Range, I-6
Fan Filter Cleaning, 3-2 Frequency Accuracy, l-3 Fuse Replacement, 3-1
I
Impedance Calculation, 2-1 Inductance Reading Checks, l-11
Inltial Conditions,
Internal Bias Voltage Accuracy, l-6
1-l
L
Line Fuse, 3-l Line Power, l-1
M
Measurement Accuracy Tests, l-7 Measurement Signal Destination, l-4 Measurement Signal Level Accuracy, 1-3
Measurement SignaI Tests, 1-2
Ordering Parts, 3-5 Oscillator, 2-4 Output Impedance Accuracy, l-4
P
Parts List, 3-5 Performance Verification, l-l Principles of Operation, 2-l
R
Recommended Equipment, l-7 Recommended Test Equipment, l-2 Repair,3-2 Repair Surnmsq, 3-4 Resistance Standards Accuracy, l-7
S
!kvice Information, 3-l
F
Factory Service, 3-2
0
Operation Check Procedure, 3-4
V
Verification Limits, l-l
SERVICE FORM
Model No. Name and Telephone No. colnpany
List all control settings, describe problem
IIlIntermittent
q
DEEE failure
UFront panel operational
Display or output (circle one)
q
Drifts nUnable to zero nUnstable ROverload
q
Calibration only IData required
(attach any additional sheets as necessary.)
DAnalog output follows display q Particular range or function bad; specify
q
0bvious problem on power-up q Batteries and fuses are OK
q
All ranges or functions are bad achecked all cables
q
Will not read applied input
q
Certificate of Calibration required
Serial No.
and check boxes that apply to problem.
Date
Show a block diagram of your measurement system including all instruments connected (whether power is turned on or not). Also, describe signal source.
Where is the measurement being performed? (factory, controlled laboratory, out-of-doors, etc.)
What power line voltage is used? Relative humidity?
Any additional information. (If special modifications have been made by the user, please describe.)
Other?
Ambient Temperature?
OF
Be sure
to
include your name and phone number on this
service
form.
Keithley Instruments, Inc. 28775 Aurora Road Cleveland, Ohio 44 139
Printed in the U.S.A.
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