Tableof Contents

Model34904

TABLE0F C0NTENTS(Gont'd)

Section

 

 

Page

I V . T H E O R Y O F O P E R A T I.O N

 

. . . . . . . . 4 - I

4-1.

Introduction

 

...4-l

4-3.

GeneralTheoryof Operation

. . .4-l

4-5.

SignalConditioning

 

 

4-7.

Circuits . . . . . . . . 4-l

ReferenceVoltages

 

...4-l

4 - 9 .

DCAmplifier

 

...... . 4 - l

4-ll.

Analog-to-Dgital

 

 

 

Converter. . . . .. . . 4-l

4 - 1 3 . L o g r c.

 

. . . . . . 4 - l

4 - 1 5 . D i s p l a y

 

. . . . . . 4 : 2

4-17.

RangeandFunctionControl . . . - . . . 4-2

4-19. DCAnalogCircuits

 

.. - .4-2

4 : 2 1 . I n p u t A t t e n u a t o r

 

. . . . . . . . 4 - z

 

. .

 

4 - 23 . DCAmplifier

 

. ..... . +3

4 - 25 . DCAmplifierGain.

 

... ..... 4 - 3

4-27. SwitchingCircuits

 

....4-3

4-29.

BootstrapCircuit

 

....4-3

4-31.

ReferenceVoltages

 

. . .4-3

4 - 33 . OverloadProtection ........ 43

4 - 35 . LeakageControl

 

..... 43

4-37.

DCAmplifier

 

. . . . .4-3

4-39.

AutoZero

 

IntegratorCircuits

 

. .. . .4-s

440. Dual-SlopeIntegration

 

.. .,..4-s

42 .

IntegratingAmplifier

 

....... 4 - 5

4 44.

x 20Amplifiet-..

 

. . .M

446.

ZeroDelectAmplifier

 

......M

4-48. ElectronicSwitch

 

....M

4-50.

Integrator

 

. . - ... .44

 

AutoZero

 

4-52. ACConverter

 

. . .44

4-54. ACAttenuators..

 

...44

4 - 56 . ConverterAmplifier

........ 44

4-58. RectifierandFilter

 

. . . +7

4 4 0 . O h m s C o n v e r t e r . . . .

 

. . . * 7

4 4 2 .

C u n e n t S o u r c e

 

. . . . . . 4 - 7

444.OhmmeterPowerSupply . . . .4-7 ," 4 - 66 . OhmmeterReference ....... +g

4 4 8 .

I n p u t P r o t e c t i o n . . .

. . + 9 .

4:70 . DsplayAssembly(Figure7 - 27) ....... 44

4 - 71 .

DisplayUnits.

...... 4 - g

4 - 7 3 . S c a n G e n e r a t o r . . . . . . . . . . . . + g

4 - 7 5 . S c a n D e c o d e r

. . . . . . . 4 - 8

4 - 77 . PolarityDisplay

..... 4 - 8

4-79. DecimalsandAnnunciators. . . . . . . . 4-B

4 - 8 1 . I n g i c C i r c u i

s

. . . . 4 - 8

4 4 2 .

C l o c k .

t. . . .

 

. . . . . . 4 3

4 4 4 .

D a t a C o u n t e r

. . . . . . . + 9

4 - 8 6 . B u f f e r s

 

. . . . . . + 9

+88.

Timing

 

. .. . . +9

4-90.

Counter

Algorithmic

 

 

4-105.

StateMachine. . . . . . . . +ll

InputPolarity

.. . . . 4_12

 

 

Storage

4-107. TransferandZeroDetect

. . . 4-12

4 - 113 . OverloadStorage

... +13

+l15. DCSwitching

. . +13

 

Logic.

+117 . ReferenceSupplies

... +13

4 - 11 8 . V o l t a g e

 

 

+122.

M e a s u r e m e.n. .t.s . . . . . . . + 1 3

RatioMeasurements

 

 

( O p t i o n 0 8 0 )

. . . . + 1 4

 

 

.

+118. FrontPanelSwitching

. ... . . .4-15

ir-

SectionIV (cont'd)

page

4

- 130PowerSupplies.

... 4 - 15

 

...

4-132.Self-TestFunction

....4-16

4

- 134 . LogicTest,NoI ..

.. +16

+1 3 7 . l O V R a n g e Z e r o , T e s t2N.o... . . . + 1 7

4-139. TurnoverError,TestNo3. . ....... 4-17 +141 . f ReferenceCheck,TestNo4 ..... 4 - 17 4 - 143 . 0 . 1VRangeZero,TestNo5 . ..... 4 - 17 4-145. x.0l Atten.,x 100Gain,

 

 

T e s t N o . 6 . . . .

 

. . 4 - 1 7

 

+147 . OhmsReference,TestNo7 . ...... 4 - 17

 

4-149.BCDRemoteExpandOption020

 

 

4-150.

( F i g u r e T - 3 1 )

. . . . . 4 - t 7

 

OutguardPower

- . . .4-l,l

 

 

Supply

 

4-152.

IsolatedTriggerandHold

. . . zt-18

 

4-154.

Sample/HoldTriggerCircuits

 

4-158.DataOutputOption021 ..

. .. .. . 4-18

 

. . .4-18

 

+ 1 6 0 .

D a t a M u l t i p l e x.e. r s

. . . . . . . 4 - 1 8

 

4-162. DataOutputSequential

 

 

4-164.

Logic ..... 4-18

 

DataClock

 

. . +lg

 

+166.

Isolation

 

. .4-18

 

 

Assembly

 

 

4 - 1 6 8 . S h i f t R e g i s t e. .r.s.

. . . . . . . 4 - 1 9

 

+ 1 7 0 . D a t a F l a g

. . . + 1 9

 

4 - 1 7 2 . P r i n t e r H o l d .

. . . . . . + 1 9

 

4-174.RemoteControlOption022 . .. . . .. .+19

 

4 - 176 . Circuitlsolation

- ... +19

 

+ 1 7 8 . R e m o t e E n a b l e

. . . - . + 1 9

 

4 - 180 . OutguardMultiplexer ...... +19

 

4-182. RemoteSequentialLogrc .

 

. - 4-19

 

4 - 184 . ProgramFlag .

... - . +19

 

+186.

DataClock

 

. .4-20

.

4 - 188 . ShiftRegisters

..... 4 - 20

+19O. Local/RemoteMultiplexers. ......4-20

 

4-192. Local/RemoteFlip-Flop ....+2O

 

4:194.

DataFlag

. . .4-20

 

4-196.GeneralPurposeInterfaceBus

 

 

 

I/O(Option

.. .. . . .4-20

 

 

030) .

 

+ 1 9 8 . G P I B S y s t e m

. . . . . . 4 - 2 0

 

4-201.

BasicTheoryof GPIBI/O Circuits. . +21

 

4-204. GPIBSystemOperation

. . . .4-21

 

4-212.Sample/HoldOption040or 045 . . . . .4-22

 

+214.

Track/HoldMode.

 

. .4-22

 

+216 .

Acquire/HoldMode.

...... 4 - 22

 

4-218.

Sample/HoldMeasurement

 

 

 

Sequence

 

..+22

 

4-221. Sample/HoldAnalogCircuits... ...4-23

 

4-228. Sample/HoldLogicCircuits. . . . . . . +25

Section

 

 

Pase

V .

MAINTENANCE...

... . s]r

 

5 - 1 . I n t r o d u c t i o n

. . . . . 5 - l

 

5-3. RecommendedTestEquipment.

.. . 5-l

 

5 - 5 . T e s t R e c o r d

.. ...

 

. . . . . 5 - l

 

5 - 7 . P e r f o r m a n c e T e s t s .

. . . . . . 5 - l

 

5 - 9 . DCVoltmeterAccuracyTest .. ... 5 - l

 

5-l l. ACVoltmeterAccuracyTests

. . . 5-l

 

 

.

 

5 - 15 .OhmmeterAccuracyTests .. .... - 5 - 2

 

5 - 1 6 . P r e f e r r e d M e t h o d

. . . . . . 5 - 2