HP 3490A Service manual

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349:04
HEWLETT
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HEWLE"WPACKARD
CE
RTI
FI
CATI
O
tII
TheHewlett-PaclnrdCompany
certifinsthat thisinstrammt was
thoroughly
tested,
ond.inspected
and fourd to meet its pu,blished
specifications
whm it was
shipped
lrom thefactorU.
TheHewlett-
Paclard Com,pany
further certifies tlmt its calibration rneo$re-
m,mts
are traceable
to the U.S.Natiornl Bureau
of Standards to
tlrc ertmt allowedby the Brneau'scalibration
facility.
WARRA]TTY
ATD
ASSISTAITCE
All Hewlett-Packard
productsare warranted againstdefectsin
materials
andworkrnanship."'This
warrantyapplies
for oneyear
from the dateof delivery,
or, in'the caseof certainmajor compo-
nentslisted in the operatingmanual,
for thespecified
period.
We
will repairor replace
products
which
prove
to bedefective
during
thewarrantyperiod
provided
theyarereturned
to Hewlett-
Packard.
No otherwarranty is expressed
or implied.Weare not
liablefor consequential
damages.
Service
contracts
or customer
assistance
agreements
are available
for Hewlett-Packard
products
that requiremaintenance
and re-
pair on-site.
Forany
assistance,
contact
yournearest
Hewlett-Packard
Sales
and
Service
Office.Addresses
areprovided
at theback of this manual.
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v
OPERATING
AITD
SERYICE
MAIIUAI
ManualPartNo.
03490-90014
MicrofichePartNo.03490-90064
MODEL
3490A
MUtTIM ETER
!;:,'
;.t; .:
:i;:
-:
!:.. '.
::::
"
Themain
body of thismanual
appliesto
SerialPrefix 1211A
Any changes
madein instruments
manufactured
after this
printing will be found in a "ManualChanges"
supplement
supplied with this manual. Be sure
.to examine this
supplement,
if oneexists
for thismanual,
for anychanges
whichapplyto your instrument
andrecord
these
changes
in
the manual.
Backdatinginformation
for instruments
manu-
factured
before
this printingwill be found in SectionVIII.
CopyrightHewlett-Pack
afi Company|972
P.O.
Box
301,
l,oveland,
Colorado 80537 U.S.A
Printed:
APRIL
1974
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Model3490A
TABLEOF
Section Page
I. GENERALINFORMATION... ......I-1
l-1. Introduction ...1-l
l-5. Specifications
.... .'-.l-l
l-8. Options -......1-1
l-10. AccessoriesSupplied ...1-l
l-12. AccessoriesAvailable ...1-1
l-14. Instrument
andManual
Identification ......1-2
Section Page
II. INSTALLATION
ANDINTERFACE
.... ... .2-I
2-l- Introduction ..-2-l
2-3. Initiallnspection.. ....2-l
2-5. PowerRequirements -..2-l
2-8. PowerCordsandReceptacles
.. - .....2-l
2-10. GroundingRequirements...
...
.. .
-
..2-1
2-14. Environmental
Requirements
. . . . -. . .2-l
2-16. Installation ....2-2
2-17. BenchUse -...2-2
2-19. RackMounting.... .... -...2-2
2-21. Installationofoptions .... -...2-2
2-23. Isolated
DataOutPut
Option021
(-hp
lll2lA) .. ..... .2-2
2-25. IsolatedRemote
OPtionO22
(hpllr22{). ---..2-2
2-27. Option050andOption060
.. ..... -2-3
2-29. InterfaceConnections ...'....2-3
2-30. DataOutput
OPtion
021 .. . -2:2
2-32. RemoteControlOption
022..... -. -2-3
2-34. RearInput . . .24
2-36. General
Purpose
Interface
Bus
Connections ...'-..24
2-38. InterfaceCableLength ......2-6
24O Trigger
Connections,
GPIBOption030 .......2-8
242. Sample/Hold
Connections, -'-''
Option
UO|O4| ... ... . .2-8
246. RepackagingforShipment .....2-9
Section Page
Iil. OPERATING INSTRUCTIONS.
. . .. ..3-I
3-1. Introduction ...3-1
3-3. InstrumentCapabilities --...'.3-l
3-4- Standardlnstrument ....'...3-1
3-6. Output andRemote
ControlOptions .3-l
3-9. Sample/Hold Option
040or &15 . ' . .3-1
3-ll. RatioOption
080
.
. .. .. ..
..3-l
3-13. Front andRear
Panel
Description. -. . -3-l
3-15. MadmumlnputVoltages
...........3-l
3-17. GeneralOperatinglnstructions
.-... ..3-2
3-18. Turn-OnandWarm-Up ......3-2
3-20. Guarding .....3'2
3-24. FloatingMeasurements
..... ..... -.3-2
3-26. Overrange
Measurements
. . . . . . . . . -3-3
3-28. Overloadlndication ........3-3
3-30. Rangelndication .. ...-....3-3
3-32. Functionlndication ........3-3
Table
ofContents
CONTENTS
Section
III (cont'd) Page
3-34. Autoranging ........3-3
3-36. ManualTrigger ......3-3
3-38. Self-TestOperation ....3-3
340. DCVoltageMeasurements
........... 3-3
342. DCSample
Rate
and
ResponseTime. ....34
344. InputResistance
.. . .. .. ... .34
346. ACVoltageMeasurements .....34
348. AC Sample
Rateand
ResponseTime. ....34
3-50. FrequencyRange. ...34
3-52. Inputlmpedance
.. ........34
3-54. HarmonicDistortion ........34
3-56. Resistance
Measurements
. . . . . . .. . . . .34
3-58. InputConnections
. ........3-5
3-60. Ohms SignalVoltage
andCurrent. . . .3-5
3-62- Ohmmeter Sample
Rateand
ResponseTime. ....3-5
3-64. ExternalTrigger
(Option020) . . .. . . . . 3-5
3-66. DataOutput (OptionO2l) . . . . .3-5
3-68. Output Signals
and
l,evels . . . .3-5
3-71. Input Sigrals andhvels . . . . .34
3-73. DataOutput Isolation . .. . . . .3-6
3-75. RemoteControl
(Option
022).. .. . . . .34
3-77. InputSignalRequirements
..... ....34
3-79. OutputSignals ......36
3-81. Remote
Programming
Procedure. . . .34
3-83. RemoteControlof Test
Function . . .34
3-85. RemoteControlIsolation . . . .34
3-81. General Purpose
InterfaceBus
I/O(Option030). ........3-7
3-90. GPIB Bus
Signals . . . .3-7
3-101. Talk Only(NoController) . . . . . . . . .3-8
3-103. GPIBControl of3490A .. ...3-8
3-131. GPIBOperating
Example . . . 3-13
': 3-136. Control
by MarkedCard
Programmer .....-3-14
3-139. Sample/Hold
Measurements
(Option
040
or045)
.. ... .3-15
3-140. Definitionof Sample/Hold
Terms. . . 3-15
3-152. SpecialS/HOperating
Considerations
.... ......3-16
3-156. GuardConnection
in Sample/Hold
Measurements
..... ......3-16
3-158. InputSignal Limitations . .. .3-16
3-160. Sample/Hold
TriggerSignal
Requirements
..... .....'3-16
3-165. InitiatingaSample/Hold
Measurement .... -3-17
3-173. Usingthe
Track/HoldMode
.... .. .3-18
3-179. Using
theAcquire/Hold
Mode . . . . .3-20
3-182. Using
50Hz or 60HzPower
Source
.3-21
3-184.Ratio
Measurements
(Option
080). .. .3-21
3-186. External
Reference
Voltages
---. ...3-21
3-188. InputConnections
. .......3-21
3-190. RatioDisplaY ......3'21
3-192. RatioMeasurementProcedure
.' -- -3-21
iii
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Tableof Contents Model34904
TABLE
0FC0NTENTS
(Gont'd)
Section Page
IV. THEORYOFOPERATION
. ........4-I
4-1. Introduction ...4-l
4-3. GeneralTheory
ofOperation .. .4-l
4-5. SignalConditioning
Circuits. . .. .. . . 4-l
4-7. ReferenceVoltages ...4-l
4-9. DC
Amplifier ...... .4-l
4-ll. Analog-to-Dgital
Converter
.. .. .. . . 4-l
4-13. Logrc. ......4-l
4-15. Display ......4:2
4-17. Range
andFunction
Control . . . -. . . 4-2
4-19. DC
Analog
Circuits .. -.4-2
4:21. InputAttenuator
.. ........4-z
4-23. DC
Amplifier ...... .+3
4-25. DCAmplifier
Gain. ... .....4-3
4-27. SwitchingCircuits ....4-3
4-29. BootstrapCircuit ....4-3
4-31. Reference
Voltages .. .4-3
4-33. OverloadProtection ........43
4-35. Leakage
Control .....43
4-37. DC
Amplifier
AutoZero .....4-3
4-39. Integrator
Circuits ... ..4-s
440. Dual-Slope
Integration .. .,..4-s
42. IntegratingAmplifier .......4-5
4
44. x 20Amplifiet
-.. ...M
446. ZeroDelectAmplifier ......M
4-48. ElectronicSwitch ....M
4-50. Integrator
AutoZero ..
-... .44
4-52. AC
Converter .. .44
4-54. AC
Attenuators
.. ...44
4-56. ConverterAmplifier ........44
4-58. Rectifier
andFilter .. .
+7
440. OhmsConverter.... ...*7
442. CunentSource ......4-7
444. OhmmeterPower
Supply ....4-7 ,"
4-66. OhmmeterReference .......+g
448. InputProtection... ..+9.
4:70. Dsplay
Assembly
(Figure
7-27).......44
4-71. Display
Units. ......4-g
4-73. ScanGenerator.... ........+g
4-75. ScanDecoder .......4-8
4-77. PolarityDisplay .....4-8
4-79. Decimals
and
Annunciators
.. . . .. . . 4-B
4-81.
IngicCircuits
.... ....4-8
442. Clock. ......43
444. DataCounter .......+9
4-86. Buffers ......+9
+88. Timing
Counter ... ..+9
4-90. Algorithmic
StateMachine
..... ... +ll
4-105. Input
Polarity
Storage .. .
.. 4_12
4-107. Transfer
andZero
Detect .. . 4-12
4-113. OverloadStorage ...+13
+l15. DC
Switching
Logic. ..+13
+117.
ReferenceSupplies ...+13
4-1
18. Voltage
Measurements
.... ....... +13
+122. RatioMeasurements
(Option080)
. ....+14
+118.Front
Panel
Switching .
... ...4-15
ir-
SectionIV (cont'd) page
4-130.PowerSupplies
... ...4-15
4-132.
Self-TestFunction ....4-16
4-134. LogicTest,No.
I . ..+16
+137. lOVRangeZero,TestNo.
2 ...... +17
4-139. TurnoverError,
TestNo.
3 ........ 4-17
+141. f ReferenceCheck,TestNo.
4 ..... 4-17
4-143. 0.1VRangeZero,TestNo.
5...... 4-17
4-145. x.0l Atten.,
x 100
Gain,
TestNo.6.... ..4-17
+147. Ohms
Reference,TestNo.
7 .
......4-17
4-149.
BCD
Remote
Expand
Option
020
(FigureT-31) .....4-t7
4-150. OutguardPower
Supply -...4-l,l
4-152. Isolated
Trigger
andHold ...zt-18
4-154. Sample/HoldTriggerCircuits
... .. .4-18
4-158.
Data
Output
Option
021
.. ...4-18
+160. DataMultiplexers
.. .......4-18
4-162. DataOutputSequential
Logic..... 4-18
4-164. Data
Clock . .+lg
+166. Isolation
Assembly ..4-18
4-168.
ShiftRegisters
.... .......4-19
+170. DataFlag ...+19
4-172.
PrinterHold. ......+19
4-174.
Remote
Control
Option022... .
... .+19
4-176. Circuitlsolation -...+19
+178. RemoteEnable ...-.+19
4-180. OutguardMultiplexer ......+19
4-182. Remote
Sequential
Logrc. .- 4-19
4-184. Program
Flag
. ... -.+19
+186. Data
Clock ..4-20
4-188. Shift
Registers .....4-20
. +19O. Local/RemoteMultiplexers
.......4-20
4-192. Local/RemoteFlip-Flop ....+2O
4:194. DataFlag ...4-20
4-196.
GeneralPurpose
Interface
Bus
I/O
(Option
030). .. .. ...4-20
+198. GPIBSystem ......4-20
4-201. Basic
Theory
ofGPIBI/OCircuits
..+21
4-204. GPIB
System
Operation . .. .4-21
4-212.
Sample/Hold
Option040or045 ... ..4-22
+214. Track/Hold
Mode. ..4-22
+216. Acquire/HoldMode
. ......4-22
4-218. Sample/HoldMeasurement
Sequence ..+22
4-221. Sample/HoldAnalogCircuits
... ...4-23
4-228. Sample/Hold
Logic
Circuits... ... .
+25
Section Pase
V. MAINTENANCE
... ... .s]r
5-1. Introduction .....5-l
5-3. RecommendedTestEquipment.
.. ... .. .
5-l
5-5.TestRecord .....5-l
5-7. PerformanceTests. ......5-l
5-9. DCVoltmeterAccuracyTest.. ...5-l
5-ll. ACVoltmeter
Accuracy
Tests
. .. .5-l
5-15.
OhmmeterAccuracyTests.. .... -5-2
5-16. PreferredMethod ......5-2
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Model3490A Table
of Contents
rABLE
OF
CONTENTS
(Cont,d)
Section
V (cont'd) Page Section page
5-18. Ätemate
Method ..... .5-2 VII. TROUBLESHOOTING AND
5-2O-D0Common-ModeRejectionTest......5-2 CIRCUITDIAGRAMS .......7-l
5-22.
A9Common-ModeRejectionTest
......54 7-1. Introduction ...7-l
5-24-
ACNormal-Mode
Rejection
Test
.. ......54 7-3. Preliminary
Troubleshooting
... ... ...7-l
5-26.
DcVoltmeterlnput 7'5. TroubleshootingTrees ........7-l
Resistance
Test
.. .... .54 7-7- Access
for
Servicing .. ..7-l
5-28.
AcVoltmeterlnput 7--9. PowerSupplyChecks ........7-l
ImpedanceTest. .....S-5 7-13.
DCAnalogCircuits ....7-2
5-30.Sampli/Hold
Performance 7-15- ,{2Assembly
Exchange . .. . .7-2
(Option04OlO45) .....5-5 7-17- DCAmplifierChecks .......7-2
5-32. Sample/HoldDCMeasurement 7-22. DC
Amplifier
Switching
Circuits
. .. ..7-3
AccuracyTest.. ......54 7-25. ReplacementofQCR3Ol ....7-3
5-34.
Sample/HoldResponse
Test ... ..5-6 7-27. A-to-D
Conversion
Circuit
Checks
. .. ..7-3
5-36.RatioPerformance(Option080)..
......5-7 711. IntegratorTroubleshooting
..........74
5-38. DC/DCRatio
Accuracy
Tests
541. AClDCRatioAccuracyTest .....5-g 737' OhmsConverterTroubleshootlng.....74
543- ExternalReferenceinput !19 DisplayTroubleshooting
............7-s
ResistanceTest.. .....5-8 t4z' LogicTroubleshooting
545. GPIB
Operational
Check
(Option
030) .. .5-8 - ,6 _ Suggestions
.. ... .. .7-5
547. General
TestProcedure
..-.
. ...5-lI t4ö- Data
Output
Troubleshooting
549. TestProcedure
Using (Option
O2l) . .. . ..7-5
Model
98204
Calcrilator .. ...5-l
l 7-50. Remote
Control
Troubleshooting
5-51.
AdjustmentProcedures... .....5-14 (OptionO22)
. .....7-5
5-53.PowerSupplyAdjustment ......5-14 t-)2' GPIBTroubleshooting
5-55.
DCZeroAdjustments.. .......5-15 (Option030)
. .....'l-5
5-57.
ReferenceAdjustments... .....S-15 !-)5' GeneralChecks ......7-s
5-59.
DC
Amplifier
Adjustments
561.ACCorrverterAdjustments .....5-15 !'t7' ExternalTriggeiCircuitCheck.
.....74
563. lVRangeAdjüstments ......s-15 1-t?'sample/HoldSJrvicing ........74
544. l0VRangeAdjustments .....5-16 !-bu' AccesstoSample/HoldCircuits
.....74
5-65. 100
V Range
Aäjustments ....5-16 743' Operating
the
3490A
with
5-66.
OhmmeterAdjustments.. ......5-16 Sample/HoldAssembliesRemoved..T6
5-69.Sample/HoldAdjustments. .....5-16 !t2 Sample/HoldTroubleshootingTrees...T4
5-71. Offset
Gain
Adjustment ... .. .5-16 t4'1. Ratio
Troubleshooting .... ....7-8
5-73. Offset
Adjustment
. ...5-17 749- External
Reference
Amplifier
5-75. Dielectric
Absorption
Adjustment
... .5-17 Checks
. ....7A
5-77. Response
Adjustment
...... .. S-iA
t^'
5-79.
Ratio
Reference
Adjustments .. .5-lg r. 7'73. Reference
Polarity
Logic
Checks
. .. . 7-8
7-75. SchematicNores. .....7_g
Section page 7'77. Logic
Gate
Symbols . .. .7-g
VI. REPLACEABLEPARTS ......6-I SCCtiON PAgE
6-1. Introduction ...6:l VlI. BACKDATING
.... ... .8_l
6-1 Orderinglnformation ........6_l g_1.
Introduction .....g_l
6-6. Non-Listedparts
. .....6-l g_3.
Change
Sequence ........ g_l
6-8. ProprietaryParts. .....6-l g-5.partsNotUsted. ........g_l
APPENDICES
A. Code
List
ofManufacturers
B. Sales
and
Service
Offices
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Tableof Contents Model34904
LIST
OF
ILLUSTBATIONS
Figure Page
2-1. LineVoltageSelection . . .2-l
2-2. PowerCordConfigurations.... .......2-l
2-3. Model3490ADimensions ......2-2
24. Installationof Isolated BCDOutput
and
Remote
Options .... . .. .2-3
2-5. DataOutputConnections,Option021 ........24
2-6. Remote
InputConnections,Option
022 ... . . .. 2-5
2-7. RearlnputConnectorandCable .......2-6
2-8. InterfaceBusCables . . . .2-6
2-9. General
PurposeInterfaceBus
Connections.. . . .2-J
2-10. Tigger Connections,GPIBOption030 . . .. . . . .2-8
2-l I . TriggerConnections
S/HOption045 . . . -.. . . . . 2-8
3-1. Front and
Rear
Panel . . . . 3-0
3-2. ConnectingtheGuard . . .3-2
3-3. OhmmeterlnputConnections. ........3-5
34. ExternalTrigger
Sequence
(Option
020) ... ... .3-5
3-5. Option
021
Printout . .. .3-6
3-6. RemoteProgram
Sequence
(Option 022) . . . . . .3-7
3-7. Positionof Jumper
Wireson Outguard
Mother
Board
AssemblvA31
3-8. TimingDiagram,
3490AAddressed to Listen . .3-l I
3-9. TimingDiagram,3490AAddressed
to Talk . . . .3-12
3-10.ExampleofMarkedCardProgramming
. . .. ... 3-15
3-1l. TypicalResponseto aStep
InputVoltage.... ..3-18
3-12.
Di$tizingaRamp .....3-19
3-13. UsingDelayed-Sweep
Oscilloscope
in
RampLinearityMeasurements
.. ...3-20
3-14. Filter
OutputMeasurement . .. .3-2O
3-l5. Measurement
of aStep
Input . . . 3-21
3-16.
RatiolnputConnections. .....3-21
4-1
. Dual-SlopeIntegration ...4-1
Figure Page
4-23. Waveforms
Illustrating
Acquire/HoldMode. ......4-22
4-24. Simplified
Diagram
and
Operationof
S/HCircuit
A.. .. ....4-23
4-25. SimplifiedDiagram
of S/H Circuit
B . . . ... .. .4-24
4-26. Aebctric Absorption
Compensation. . . . . . - . . 4-25
4-27. Sample/Hole
LogicBlockDiagram .. . .... . . . 4-25
4-28. BlockDiagram
of S/HTiming
andTriggerCircuits .......4-26
4-29. Sample/Hold
TriggerTiming .. .4-26
4-30.
Sample/HoldMeasurement
Sequence
.. .. -...+28
4-31. Sample/Hold
SimplifiedDiagram
and
Measurement
Sequence ....+29
5-1. ACVoltmeter
HighFrequency
AccuracyTest.. .....5-2
5-2. DCCommon-Mode
RejectionTest .....5-3
5-3. ACCommon-Mode
RejectionTest . . . . .54
54. ACNormal-Mode
RejectionTest.. ..... 5-5
5-5. DCVoltmeterlnput
ResistanceTest.. .. .. .. . .5-5
5-6. ACVoltmeterInputImpedanceTest
.
... ...... 5-6
5-7. Sample/HoldResponseTest . -. .5-7
5-8. External
Reference
Input
ResistanceTest.. ....5-9
5-9. Location
of Adjustments,
Standard3490A ....5-14
5-10.
LocationofSample/HoldAdjustments .. .....5-17
5-ll. LocationofRatioAdjustments .......5-18
6-1. ChassisParts
. ..6-30
G2. BindingPost
Assembly
.... ...6-31
6-3. SwitchAssembly ......G31
7-1. Switching Inputsto A2U2 . . .. ..7-3
7-2. SwitchingOutputsofAlU4Ol ........1-3
3-8
4-2. BasicDiagramandOperation..... .....1"2 .:7-3.Sample/HoldAssembly ........7-7
4-3. SimplifiedDiagram,DCAmplifier ......4-3 14. deneralTroubleshootingTree ....7-ll17-12
44. Measurement
Sequence .. . ... -.44 iL' l-5. DCAna1osTroubleshootins
Tree .]-1317-14
4-5. SimplifiedDiagram,
IntegratorCircuits . . . . - . . . 4-6 j 4. ACConveiter
TroubleshoolingTree . . .. . i,-1511-16
4-6. SimplifiedDiagram,
ACConverter
. . . . . . . . . . . .4-7 7-7. OhmsConverterTroubleshooting
Tree .. .7-1717-18
4-1. SimplifiedDiagram,OhmsConverter..........4-8 7-9. DisplayTroubleshootingTree ....|.-1917-20
4-8. BlockDiagram,
Clockand
Counters . . . .4-9 j-9. LoeicTestTroubleshooting
Tree . .7-21
17-22
4-9. TypicalStateMachineBlockDiagram ...4-g 7-tO.I_ofibClockTroubleshooti"ngTree.......l-2317-24
4-10. Block Diagram,
MainLogic 7-l l. Data
Output Troubleshooting
Tree
ASMFlowChart. ...4-10 option}2l .. ..1-2517-26
4-l l. Block
Diagram,
Main
Logic
Circuits . . ..4-11 7-12.RemoteTroubleshooting
Tree,
4-12. BlockDiagram,
Qualifier
Multiplexer ..4-12 option 022 . . . .i-2717-28
4-13. SimplifiedDiagram,Reference 7-13. GPIB
I/O Troubleshooting
Tree,
andRatio
Circuits . . .4-13 Option030 .. . .7-2917-30
4-14. SimplifiedDiagram,External 7-14.Sample/Hold
GeneralTroubleshooting
Reference
Circuits . . 4-14 Tree . ..1-31
17-32
4-15. InputBias
Compensation
. .. . . .4-15 7-1
5. Sample/Hold Logic
Troubleshooting
4-16.ReferencePolarityLogic. .....4-15 Tree.. .1-3317-34
4-17.
PowerSupplyBlockDiagram
... .....4-16 7-16.RatioTroubleshootingTree ....7-35
418. DataOutputTimingDiagram(Option02l)
...4-18 7-17.LocationofAssemblies ... ....7-36
4-19. Remote
Control
TimingDiagram 7-18.3490ABlock Diagram . .7-37
(Option
022) . .....4-19 7-19.ReferenceDesigrations .. .....7-38
4-20. T1'pical
Bus
System . . . .4-20 7-20.Schematic
Diagram,
DCAmplifier
4-31.SampleiHold
CircuirPosition ..4-22 andSwitching
Circuits,
Al, A2 .7-391740
-1-ll. \\'aveforms
Illustrating 7-21.Schematic Diagrant,
Integratorand
Track'Hold\{ode. ..+22 Tr,roDetectCircuits,Al... ...74117-42
'.;
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Model3490A Table
ofContents
Figure
7-22. Schematic
Diagram,
Reference
and Page
Ratio
Circuits,
Al, Al3 7431:144
7-24. Schematic
Diagram,
MainLogic,
Al . . . . .745;1746
7-23. Schematic
Diagram,
Clock
andCounters,Al
.. ...7_47174g
7-25. Schematic
Diagram,
DC Switchins
Logic,Al
.....:.
7-26. Schematic
Diagram,
power Suppli€s,' --
41,
A8
7-?7.l+e;atic
Diagram,
?ror"r,
o, :.
.
..
. äl',i_]l
7-28. Schematic
Diagram,
Function.
Range,
and
SampleRate
Switches,
AS .7_5517_56
222.l*" atic
Dagram,
AC
Converter,
e.S--.
..7_5717-Sg
7-30.
Schematic
Diagram,
Ohms
Converi"r,
X .7_5917_60
7-3I.Schematic
Diagram,
External
Trissei'
--'
- _Circuits,
Ag,
A2), A2g,
A37:. j_6117_62
7-32. khematicDiagram,
Data
Output
^ .
Option
021,
A9,
A10,
Al5: ....7-6317_64
7-33.
Schematic
Diagram,
Remote
tnpui -' ' '
Option
022,
AII, AI2, Ali .. .7_651746
LIST
0F
tLLUSTRAT|0NS
(Cont,d)
TIST
OF
TABTES
Figure
7-i+. schematic
Diagram,
sample/Hold Page
AnalosCircuits,
A27'
....... .7_671j_6g
7-35.
Schematiö
Diagram,
Sample/Hold
LogicCircuit:,12S...
. .. ...7_6917_70
7-36.
Block
Dagram,
3490A
GPIB
I/O
Circuits
.
7-3
7.schem.li;;i;;;;; ii*,. p;;;;;'' -
.
.
7
-7
1
t
i
-7
2
and
ROM
Assy,s,
A34,
A36
:. .-.-.
....7_7317_74
7-38.
Schematic
Diagram,
GpIB
Isolation
Assemblies.
A30,A35 -.
.
... .
.7_7517_76
7-39.
Schematic
Diagram,
Outguard
Du;;
and
ROM
Assemblies,
A32,A33 7_7717_78
740. Schematic
Diagram,
OutluarJ'
Mother
Board,
fil .: ..7-7glt_80
8-1
. Component
Location,
41
1,
Serial
No.
l2ltA0[55and.Lowr;
....... ... 8_3
8-2. Schematic
Diugru.,
Al I Assembly.
Seriat
No.
r2lr/r}fiss anJi;;er ...... .
.84
Table
1-1. Specifications
...... _ Page
t-2. c.n.turrnior*;!;; ... :...
?| Option
050
and
QRtion
OAO
pari
Ctran;;,
.. ....2_3
?-? General
purpose
Interface
Brrä;;;täs .....2_7
l-1 MaximumVoltages .....3:2
1-?. Sample
Rate
andResponr.
iirnr.. .
:.. .......34
3-3. Dstortion
Error
11
ohil"a;;a;;;;i
:: : :.il
2-: cfln
Signal
Mnemonics ......'........3_7
3-6. Address
Codes
. ,
3-7. Programü;.. """"3-9
3-8.
Abti,ty;iöör6l"rä,oic,iirl' .-3-10
a Rampor Sine
Wave .
3-9. Initiating
-S/H
Measurements
_. byExternalTriggering .....3_17
Maximum
Acquisiiön
1Sät
tin
gj
^ fiTr for
Full_Range
Step
Iäput ....3_tg
Ratio
Polari
ty Disolav"
AC
AdiG;;üffi'" . "'3-21
Porariry;R;,t"ü'ä;;.;;;,
........
.....
frz
Analog Tests .
ecquiie/HoioD;i;;... "'4-16
4-22
Table
!-5. Gain
Delay
Relationship ,^X
5-1. Recommendear.rt
nq'uip.;;; : ........... ..5_0
5-2.
DCVoltmeterAccuracy
:-.'..
::............. 5_l
5-3.
ACVoltmeterAccuracy
................... 5_3
54. Ohmmeter
Accuracy
5-5. Alternate
Ohmmeter
Accuracy
Test . .. .5_3
s6. sample/HoldDCeccuracyäL;": .....s_6
5-7. DC/DCRatioAccura.v
färi-.
......... ..... .
5_7
5-8. AC/DCRatioAccura"yf.ri
.. :... .... 5_8
s-e.
powerSupplvvoltü;;
:1.'..
:............. s_ls
5-10.
Ohmmeter'Adjustment
.
. -... .
.
.. .. .5_16
Gl. Replaceabtepärts..
......:...::.....
.....6_2
-,^..
7-1.._.
power
Supply
Voltages
and
CurrentLimitValues ......7_1
T2 PowerSupplyJlTp"rwires
....... ...7_2
7-3. AC
Reed
Retay
Chäcks
.-.
.......::..
.......74
71 component
Spacing ..
..
..
..... .
...
.
.74
T: Data
Output
.irouUierhooti"g
np,
74. Alphabetical
J,istins
"f 34tö; ü;rmonir, .. .7_to
7-7. Atphabetical
Listini;itrö;ä;ö'
I/OMnem.oni.,
... .....-.'_
....7_7117_72
8-1. ManualBackdatinlih*;;;
......... ....8-l
3-10.
3-1
1.
+1.
+2.
+3.
4.
vll
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Model
34904 Section
I
03490-84401
5060-s983
o349Mt612
l2sl{084
I
2sI
-0086
03490-66504
5060{630
0349U66524
0349046525
50606032
0349046526
5060-6032
1.1.
lNTBoDucTl0N.
l-2. TheModel3490A Multimetermakes
ac
voltage,
dc
voltage,and resistance
measurements
with 5-digitresolu-
tion. It is capable of overrangemeasurements
up to
l2O% of rangeon all except the 1000V ac and dc
ranges.Polarity selection and display are automatic.
Rangeselectionis manual or automatic over all ranges
on all functions. Options are availableto provide data
output, remote programming,sample-and-hold
measure-
ments,
and
ratiomeasurements.
1-3. This manual contains installation and operating
instructions aswell asmaintenance
information for the
Model 34904 Multimeter. Instrumentspecifications
and
procedures
for verifying proper operation areincluded.
Procedures
arealsoincludedfor adjustingthe instrument
to its performarice specifications.Schematicdiagrams,
the theory of operation, and troubleshooting informa-
tion areprovided for usein maintainingthe instrument.
14. This section of the manual containsthe perfor-
mancespecificationsfor the Model3490A andliststhe
available options. It also lists the accessoriessupplied
with the Model 3490A and additional accessoriesthat
areavailable.Instrument
andmanual
identification infor-
mation is alsoincluded.
1-5.
SPECTFtCATI0NS.
l-6. Table l-l is a completelist of the Model 3490A
critical specificationsthat are controlled by tolerances.
Table l-2 contains
general
information that describesthe
operating
characteristics
of theModel3490A.
l-7. Any change
in the specificationsdue to manufac-
turing, design, or traceability to the U.S. National
Bureauof Standards
will be listed on a manual change
sheet
included with thismanual.Themanualandmanual
change
sheet
supersede
allprevious
information
concern-
ingspecifications
of rhe 3490A.
r-8.
0PT|0NS.
l-9. The following optionsare availableto extend
the
usefulness
of theModel3490A:
Option
020:
Option
021:
Option
022:
Option
030:
BCD/Remote
Expand
Isolated
Data
Output(BCD)
Isolated
Remote
Control
(Options
021
and022
require
Option020)
General
Purpose
Interface
BusI/O
(GPrB)
sEcTt0NI
GENERATINFORMATION
Option040or045: Sample-and-Hold
Option050: 34904
designed
foroperation
on
50
Hz
power
source
Option060: 3490A
desigred
foroperation
on60Hz
power
source
Option080: Ratio
I-Ill.ACCESSORIES
SUPPLIED.
l-ll. Thefollowing
accessories
are
supplied
with the
Model3490A
andits
option as shown.
Supplied
with
allinstruments:
RackMount Kit
PC
Extender
(2 x l8)
Supplied
with Option020:
Rearinput cable
36-pin
connector
(mates
with Remote
connector,
J7)
5Gpinconnector
(mates
with Data
Outputconnector,
J6)
RemoteJumper
Assembly,
A.4
PC
Extender
(2x22)
Supplied
with Option030:
l4-pin connector
(mates
withTrigger
connector,Jl l) 12514142
Remote
Jumper
Assembly,
44 0349U66504
Rearinputcable 0349041612
PCExtender(2x 22) 5060{630
Supplied
with
Option
040:
S/HAnalog
Jumper
Assembly,
A24 0349046524
.-' S/HLogic
Jumper
Assembly,
A25 03490-66525
PCExtender(2x l0) 50606032
SuppliedwithOption
045:
S/HAnalog
Jumper
Assembly,
A24
S/HLogic
Jumper
Assembly,
A25
PCExtender
(2
x l0)
l4-pin
connector
(mates
with Trigger
connector,Jl l) 12514142
Supplied
withOption
080:
Ratio
Jumper
Assembly,
A26
PC
Extender
(2
x l0)
1.12.
ACCESSORIES
AVAITABLE.
l-13. Several
accessories
areavailable
for usewith the
Model3490A.A service
videotape,Product
No. 90030C
Option 705, will demonstrate
use
of self-test
and front
panel symptoms
to isolate failures.
The -hp 111261^
accessoryprovidesa set of IC reference
boardswith
1-t
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SectionI
most of the 3490A logic IC's for use with the -hp
lO529A LogicComparator.Usingthese
boardswith the
LogicComparator,
afaulty ICcan
beisolated
in seconds
without removingit from the circuit. A spare
parts
set,
-hp- 11127A, is availablefor the 3490A. This set
contains the most critical components
of the 3490A
such as integratedcircuits,transistors
and reedrelays.
Threeinterface cablesareavailable
for theGPIBOption
030.These
cables
are
identical
except
for length.
l063lA Interface
cable,3ft.
10631BInterface
cable,6
ft.
10631C
Interface
cable,
12ft.
A GPIB Repair Kit, -hp- Part No. 0349G80009, is
available
for troubleshootingthe General
Purpose
lnter-
faceBus I/O circuits.Alsoavailableis a cable.Product
No. 562A-16C,
for usewith Option021 and*rp 50508
or 50554,Printers.Field
installable
Options
O2l and,O22
for units with Option O2O are availableby accessory
numbers
Ill2lA andI I l22A respectively.
Model
3490A
1.14.
INSTBUMENTAND
MANUAL
IDENTIFICA-
TION.
l-1
5. Instrument identification by serial number is
located on the rear panel. Hewlett-Packard
uses a
two-section serial number consistingof a four-digit
prefix and a five-digit suffix separatedby a letter
designatingthe country in which the instrument was
manufactured. (A =
U.S.A.; G
=West Germany;
J= Japan;U
= UnitedKingdom.)
l-16. Thismanual
appliesto instruments
with theserial
numbers
indicatedon the title page.If changes
have
been made in the instrument since this manual was
printed, a "Manual
Changes"supplement
supplied
with
the manual
will definethese
changes.Besure
to record
thesechanges
in your manual.Backdatinginformation in
Section VIII adapts the manual to instruments with
serial
numberslower than that shown on the title page.
Part numbersfor the manual
andthemicrofiche copy of
themanualarealso shownon the title page.
l-
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