Model3490A

Tableof Contents

rABLEOFCONTENTS(Cont,d)

SectionV (cont'd)

Page

5-18. ÄtemateMethod

. . ... .5-2

5 - 2O - D0Common - ModeRejectionTest...... 5 - 2

5 - 22 .A9Common - ModeRejectionTest...... 54

5-24-ACNormal-ModeRejectionTest.. ......54

5-26.DcVoltmeterlnput

 

 

ResistanceTest..

.... .54

5-28.AcVoltmeterlnput

 

 

I m p e d a n c e T e s t .

. . . . . S - 5

5-30. Sampli/HoldPerformance

 

 

(Option04OlO45)

..... 5 - 5

5-32. Sample/HoldDCMeasurement

 

 

A c c u r a c y T e s t . .

. . . . . . 5 4

5-34.Sample/HoldResponseTest

... ..5-6

5 - 36 .RatioPerformance(Option080) ..

5-38. DC/DCRatioAccuracyTests

...... 5 - 7

 

541 . AClDCRatioAccuracyTest ..... 5 - g

543 -

ExternalReferenceinput

 

 

ResistanceTest..

.....5-8

545. GPIBOperationalCheck(Option

 

547.

030) .. .5-8

GeneralTestProcedure

. . . 5-l I

 

. .-..

549.TestProcedureUsing

 

Model98204Calcrilator

. . . . . 5-l l

5 - 5 1 .A d j u s t m e n t P r o c e d u r e s . . . . . . . . 5 - 1 4

5-53.PowerSupplyAdjustment

......5-14

5 - 5 5D. C Z e r o A d j u s t m e n t s . .

. . . . . . . 5 - 1 5

5 - 5 7 .R e f e r e n c e A d j u s t m e n t s . . . . . . . . S - 1 5

5-59. DCAmplifierAdjustments

 

561 . ACCorrverterAdjustments ..... 5 - 15

5 6 3 . l V R a n g e A d j ü s t m e n t s

. . . . . . s - 1 5

544 .

l0VRangeAdjustments

..... 5 - 16

5-65.

100V RangeAäjustments

. . . . 5-16

5-66.OhmmeterAdjustments..

......5-16

5-69.Sample/HoldAdjustments. .....5-16

5-71.OffsetGainAdjustment

. .. .. .5-16

5-73. OffsetAdjustment.

. . .5-17

5-75. DielectricAbsorption

 

 

Adjustment. .. .5-17t^'

5 - 77 . Response

.. S - iA

 

Adjustment......

5-79. RatioReferenceAdjustments

. . .5-lg

Section

 

page

VII. TROUBLESHOOTING

 

 

AND

 

CIRCUITDIAGRAMS

....... 7 - l

7 - 1 . Introduction

... 7 - l

7-3.

PreliminaryTroubleshooting

 

 

... ... . . .7-l

7'5. TroubleshootingTrees ........7-l

7-7- AccessforServicing

.. . .7-l

7--9. PowerSupplyChecks

........7-l

7 - 1 3 . D C A n a l o g C i r c u i t s

. . . . 7 - 2

7-15-

,{2 AssemblyExchange

. . . . .7-2

7 - 17 - DCAmplifierChecks

....... 7 - 2

7-22.

DCAmplifierSwitching

 

 

Circuits. . . . .7-3

7 - 2 5 . R e p l a c e m e n t o f Q C R 3 O l . . . . 7 - 3

7-27. A-to-DConversionCircuitChecks. .. . .7-3

711 .

IntegratorTroubleshooting

 

.......... 74

737' OhmsConverterTroubleshootlng ..... 74

!19

DisplayTroubleshooting

............ 7 - s

t4z' LogicTroubleshooting

 

- ,6

_ Suggestions... . .

.. .7-5

t4ö-

DataOutputTroubleshooting

 

(OptionO2l) .

. . . . .7-5

7-50.RemoteControlTroubleshooting

 

( O p t i o n O 2 2 )

. . . . . 7 - 5

 

.

t-)2'GPIBTroubleshooting

 

 

( O p t i o n 0 3 0 )

. . . . . ' l - 5

 

.

! - ) 5 '

G e n e r a l C h e c k s

. . . . . . 7 - s

!'t7'

ExternalTriggeiCircuitCheck .

 

..... 74

1 - t ? ' s a m p l e / H o l d S J r v i c i n g. . . . . . . . 7 4

!- bu' AccesstoSample/HoldCircuits..... 74 743' Operatingthe3490Awith

Sample/HoldAssembliesRemoved..T6

!t2 Sample/HoldTroubleshootingTrees...T4 t4'1. RatioTroubleshooting . . .. . . ..7-8749- ExternalReferenceAmplifier

Checks.. . . .7A

7'73. ReferencePolarityLogicChecks. . . . 7-8

r.7 - 75 . SchematicNores . ..... 7 _ g

Section

VI. REPLACEABLEPARTS

6 - 1 . Introduction

6 - 1 Orderinglnformation

6 - 6 . Non - Listedparts.

6 - 8 . P r o p r i e t a r y P a r t s .

page

......6-I

... 6:l

........ 6 _ l

..... 6 - l

. . . . . 6 - l

7'77. LogicGateSymbols

. . . .7-g

SCCtiON

PAgE

VlI . BACKDATING

... . 8 _ l

 

....

g _ 1

. Introduction

..... g _ l

g _ 3

. ChangeSequence

........ g _ l

g - 5 . p a r t s N o t U s t e d .

. . . . . . . . g _ l

 

 

APPENDICES

A.CodeListof Manufacturers

B.SalesandServiceOffices