HP (Hewlett-Packard) 3490A User Manual

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The Hewlett-Paclnrd

thoroughly
specifications
Paclard
m,mts

tlrc

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tested,

Com,pany

are traceable

ond. inspected

whm it

further

by the Brneau's

to

WARRA]TTY

All Hewlett-Packard
materials
from
nents
will

repair
the warranty
Packard.
liable

and workrnanship."'This

the date of

listed in

or replace

No

for

consequential

delivery,

the

operating

period

other warranty

Company

was

shipped

certifies

the

U.S.

ATD

products

or, in'the

manual,

products

provided

damages.

which

is

certifins

and

lrom

Natiornl

that

this instrammt

fourd

tlmt

calibration

to meet its

the

factorU.

its

calibration rneo$re-

Bureau

facility.

ASSISTAITCE

warranted

are

warranty

case of

for

the specified

prove

they

expressed

are returned

against defects in

applies

certain

to be defective

or implied. We

pu,blished

The Hewlett-

of

Standards

for

one

major

to Hewlett-

compo-

period.

during

are not

was

to

year

We

Service
for
pair

For
Service

contracts

Hewlett-Packard

on-site.

any

assistance,

Office. Addresses

or customer

products

contact

your

provided

are

assistance

that require maintenance

nearest

agreements

Hewlett-Packard

at

the back

are

of this manual.

available

and re-

Sales

and

v

!;:,'
;.t;

:i;
!:..

::::

OPERATING

The main

.:

-:

:

'.

"

Any changes
printing
supplied
supplement,
which apply to
the manual.
factured

will

before

AITD

Manual Part No.

Microfiche Part No. 03490-90064

MODEL

M U tTIM

body of this

made in instruments

be found in

with this

if one exists

your

Backdatinginformation

this

SERYICE

03490-90014

3490A

ETE R

manual

Serial Prefix

manual. Be
instrument
printing

applies to

"Manual

a
for

this manual,

will

MAIIUAI

1211A

manufactured

Changes"

sure . to examine

and record

for

instruments

be found

after

supplement

for

any changes

these

changes

in

Section VIII.

this

this

in

manu-

Copyright Hewlett-Pack

Box

301,

l,oveland,

P.O.

afi

Company | 97 2

Colorado 80537

U.S.A

Printed:

APRIL

1974

Model3490A

Table

of

Contents

Section
I.

Section
II.

Section
Iil.

GENERALINFORMATION...

l-1.
l-5.
l-8.
l-10.

INSTALLATION
2-l­2-3.
2-5.
2-8.

2-10.

2-14.
2-16.
2-17.
2-19.
2-21.
2-23.

2-25.

2-27.

2-29.

2-30.

2-32.

2-34.

2-36.

242. Sample/Hold

Introduction
Specifications
Options
AccessoriesSupplied
AccessoriesAvailable

l-12.

Instrument

l-14.

Identification

Introduction
Initiallnspection..
Power Requirements
PowerCordsandReceptacles
GroundingRequirements...
Environmental
Installation

BenchUse

RackMounting....

Installationofoptions

Isolated

Option 021

Isolated Remote

(hpllr22{).

Option050andOption060

InterfaceConnections

Data Output

RemoteControlOption
Rear Input

General

Connections
2-38.
24O

246. RepackagingforShipment

OPERATING
3-1.
3-3. InstrumentCapabilities

3-4­3-6. Output
3-9.
3-ll.
3-13. Front and Rear
3-15. MadmumlnputVoltages

3-17.
3-18. Turn-OnandWarm-Up
3-20.
3-24.

3-26.

3-28.
3-30.
3-32.

InterfaceCableLength
Trigger

GPIBOption030
Option

INSTRUCTIONS.

Introduction

Standardlnstrument

Sample/Hold
Ratio Option

General Operatinglnstructions

Guarding
FloatingMeasurements
Overrange
Overloadlndication
Rangelndication
Functionlndication

....

and Manual

ANDINTERFACE

Requirements

Data OutPut

(-hp

lll2lA)

OPtionO22

OPtion

Purpose

Connections,

UO|O4|

and Remote

Measurements

021

022.....

Interface

Connections,

. .

Control

080 . .
Panel

..

040

Description

...........3-l

.....

Option

Bus

or &15

TABLE OF

......I-1

...1-l

.'-.l-l

-......1-1

...1-l
...1-1

......1-2

.. ... .2-I

. .

..-2-l

....2-l

- . .2-l

.. - .....2-l

.. . - ..2-1

. . .

. - . . . 2-l

. . .

....2-2

-...2-2

-...2-2

....

-...2-2

....

. . . .. .2-2

..

---..2-2

.....

..

...'....2-3

.. .

-. -2-3
. . .24

...'-..24

......2-6

.......2-8

. .. .

. ..

.....2-9

..

--...'.3-l

....'...3-1

Options

. ' . .3-1

.. . .

..

- . .

.

. -...

......3-2

.....3'2

.....

. . . . .

. . . .

........3-3

...-....3-3

........3-3

Page

Page

-2-3

-2:2

.2-8

Page

..3-I

...3-1

.3-l

. .3-l

-3-l

..3-2

-.3-2

- 3-3

CONTENTS

Section

-'-''

':

(cont'd)

III
3-34.
3-36.
3-38.

340. DCVoltageMeasurements

342.

344.

346.

348. AC

3-50.
3-52. Inputlmpedance
3-54. HarmonicDistortion
3-56. Resistance
3-58.
3-60.
3-62-

3-64. External Trigger
3-66. Data Output
3-68.
3-71. Input
3-73.
3-75. Remote Control
3-77. InputSignal Requirements
3-79.

3-81. Remote
3-83.
3-85.
3-81.

3-90.
3-101. Talk
3-103.

3-131. GPIB Operating
3-136. Control

3-139.

3-140. Definition
3-152.

3-156. Guard Connection
3-158. Input

3-160.

3-165.
3-173. Usingthe

3-179. Using
3-182.
3-184.
3-186.
3-188.
3-190.

3-192.

Autoranging

ManualTrigger

Self-TestOperation

DC

Sample

ResponseTime.

Input Resistance

ACVoltageMeasurements

Sample

ResponseTime.

FrequencyRange.

Measurements

InputConnections

Signal Voltage

Ohms
Ohmmeter

ResponseTime.

Output Signals

Sigrals

Data Output

OutputSignals

Programming
Remote Control
Remote Control

General

Sample/Hold

Purpose

I/O(Option030) .

Bus

GPIB

Only

GPIB Control

by

Programmer
(Option

Special S/H

Considerations
Measurements

Signal

Sample/Hold

Requirements

Initiating

Measurement

the

50

Using

Measurements

Ratio

External
InputConnections

RatioDisplaY
RatioMeasurementProcedure

and

Rate

.. . .. .. ... .34

Rate and

.. ........34

. ........3-5

and Current

Sample

(Option

Signals

(No

040

of

a

Track/HoldMode
Acquire/Hold

Hz

Reference

Rate and

(Option

O2l)

and

l,evels

and hvels

Isolation

(Option

of Test

Isolation . .

Interface Bus

Controller) . .

of3490A

Example

Marked Card

Measurements

or 045)

Sample/Hold

Operating

....

in

.....

Limitations

Trigger Signal

.....

Sample/Hold

Hz

or 60

(Option

Voltages

........3-3

...........

........34

. . . . . . . . . . . .34

. . .. .

020)
. .

022) ..

..... ....34

Procedure . . . .34

Function . . .34

........3-7

..

Terms . . . 3-15

Sample/Hold

Mode

Power

080).

.

Page

......3-3

....3-3

3-3

....34

.....34

....34

...34

. . . . 3-5

....3-5

. 3-5

. .
. . .3-5

3-5

. . . .

. . . . .34

.

.. . . . .3-6

..

. .34

. .

......36

. .34

. . . .3-7

. .

. .

. . . 3-8

.. . . .3-8

. . . 3-13

.....-3-14

. . . .3-15

......3-16

......3-16

.

.3-16

..

.....'3-16

-3-17

....

.... ..

Source . 3-21

. 3-18

. .

. .

.3-20

. . .3-21

- - -. ...3-21

.......3-21

......3'21

-3-21

.' - -

iii

Table of

Contents

Model 34904

Section
IV.

4-48.
4-50.
4-52.
4-54.
4-56.
4-58.

440.

442.

444.

4-66.

448.
4:70.
4-71.
4-73.
4-75.
4-77.

4-79.
4-81.

442.

444.

4-86.
+88.
4-90.
4-105.
4-107.

4-113.
+l15.
+117.
4-1
+122.

+118.

THEORYOFOPERATION

4-1.
4-3.
4-5.
4-7.
4-9.
4-ll.
4-13.
4-15.
4-17.
4-19.

4:21. InputAttenuator
4-23.
4-25.
4-27.
4-29.
4-31.
4-33.
4-35.
4-37.
4-39.

440.

42. IntegratingAmplifier
4

446.

Introduction
General Theory

Signal Conditioning
ReferenceVoltages
DC

Amplifier

Analog-to-Dgital
Logrc .
Display

Range

and Function

DC

Analog

DC
DC Amplifier
SwitchingCircuits
BootstrapCircuit
Reference
OverloadProtection
Leakage
DC

Integrator

Dual-Slope

44.

x

20 Amplifiet

ZeroDelectAmplifier

ElectronicSwitch
Integrator

AC

Converter
AC
ConverterAmplifier
Rectifier

OhmsConverter....

CunentSource
Ohmmeter Power
OhmmeterReference
InputProtection...

Dsplay

Display

ScanGenerator....

ScanDecoder
PolarityDisplay
Decimals

IngicCircuits

Clock.
DataCounter
Buffers
Timing

Algorithmic
Input
Transfer
OverloadStorage

DC

Switching

ReferenceSupplies

18.

Voltage
RatioMeasurements

(Option080)

Front

Circuits

Amplifier

Voltages

Control

Amplifier

Circuits

Integration

Auto Zero

Attenuators

and Filter

Assembly

Units .

and

Counter

State Machine

Polarity

andZero

Logic .

Measurements

Panel

Switching

.

of

Operation

Circuits . . .

Converter

Control

..

Gain .

Auto Zero

-..

..

Supply

(Figure

Annunciators

....

Storage

.

7-27).......44

Detect

....

TABLE

........4-I

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

. . . .

...4-l

......

.

. .

. .. . . 4-l

......4-l

......4:2

. . . -

. . . 4-2

.. - .4-2

........4-z

. .....

... .....4-3

....4-3

....4-3

. .

........43

.....43

. .

. . .4-3

.

.. .

.. .,..4-s

.......4-5

. . .M

......M

....M

. . -

...

.

. .44

...44

........44

. . .
...*7

......4-7

.

. . .4-7

.......+g

..+9.

......4-g

........+g

.......4-8

.....4-8

. . . . . . .

....4-8

......43

.......+9

......+9

.

.. . .

. . . .

. . .

.

.. . .

.
. . .
...+13

. . +13

...+13

.......

....+14

.

... . . .4-15

0F C0NTENTS

Page

. 4-l
.4-l

.+3

.4-3

.4-s

.44

+7

,"

. 4-B

+9
+ll
4_12

4-12

+13

(Gont'd)

Section IV

4-130. PowerSupplies
4-132.
4-134.
+137.

4-139.
+141.
4-143.
4-145.

+147.

4-149.

4-150.
4-152.
4-154.
4-158.
+160.
4-162.
4-164.

+166. Isolation

4-168.
+170.
4-172.
4-174.
4-176.
+178.
4-180.

4-182.
4-184.
+186.
4-188.

.

+19O.
4-192.

4:194.

4-196.

+198.

4-201.

4-204.
4-212.
+214.
+216.

4-218.
4-221.

4-228.

Section
V.

MAINTENANCE
5-1. Introduction
5-3.

5-5. TestRecord
5-7. PerformanceTests.
5-9. DCVoltmeterAccuracyTest..
5-l l.
5-15.
5-16.

(cont'd)

...

Self-TestFunction

LogicTest,No.

lOVRangeZero,TestNo.
TurnoverError,
f

ReferenceCheck,TestNo.

0.1 VRangeZero,TestNo.

x.0l

Atten., x 100

TestNo.6....

Ohms

Reference,TestNo.

BCD

Remote

(FigureT-31)
Outguard Power
Isolated
Sample/HoldTriggerCircuits

Data

DataMultiplexers
DataOutputSequential
Data

ShiftRegisters
DataFlag
PrinterHold.

Remote

Circuitlsolation
RemoteEnable
OutguardMultiplexer

Remote
Program
Data
Shift
Local/RemoteMultiplexers
Local/RemoteFlip-Flop
Data Flag

General Purpose

I/O
GPIBSystem
Basic
GPIB

Sample/Hold

Track/Hold
Acquire/HoldMode
Sample/HoldMeasurement

Sequence
Sample/HoldAnalogCircuits
Sample/Hold

RecommendedTestEquipment.

AC Voltmeter
OhmmeterAccuracyTests..

PreferredMethod

Trigger

Output

Clock

Control

Sequential

Clock

Registers

(Option

Theory

System

...

I

.

TestNo.

Expand

Supply

and Hold

Option

Assembly

Flag

Option 040 or

Mode .

Accuracy

021

..

....

Option 022 .

Logrc

.

Interface

030) .

of

GPIB I/O

Operation

Logic

Circuits . .

Tests

Gain,

Option

..

Logic .....

Bus

.

.

....4-16

2

. .....

3

. .......

4 .....

5

. .....

7 .

......4-17

020

.....4-t7

- . . .4-l,l

.

..

.......4-18

.......4-19

......+19

.. .

. .. .+19

-...+19

...-.+19

......+19

.

...

.....4-20

. ......4-20

....+2O

.. ..

......4-20

Circuits

. .

045 . . . .

......4-22

...

...4-23

. . . . . +25

... . s]r

.....5-l

..

...

.....5-l

......5-l

.... -5-2

......5-2

page

...4-15

..+16

+17

4-17
4-17
4-17

..4-17

zt-18

. .

.
.. . 4-18
. .

.4-18

4-18

.

. +lg

. .4-18

...+19

. - 4-19

-.+19
. .4-20

.

. .4-20

. . .4-20

. . +21
. .4-21

.4-22

. .4-22

..+22

Pase

.. .

5-l

...5-l
. . .

5-l

ir-

Model3490A

Table

of

Contents

(cont'd)

Section

Section
VI.

V

5-18.

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

5-22.
5-24-

5-26.

5-28.

5-30. Sampli/Hold
5-32. Sample/Hold DC Measurement

5-34.
5-36. RatioPerformance(Option080)..
5-38. DC/DC Ratio

541. AClDCRatioAccuracyTest

543-

545. GPIB

547.

549.

5-51.
5-53. PowerSupplyAdjustment
5-55.
5-57.

5-59.

561.

563.

544.

5-65.
5-66.
5-69.Sample/HoldAdjustments.
5-71.

5-73.
5-75.
5-77.
5-79.

REPLACEABLEPARTS
6-1.
6-1
6-6.

6-8.

Ätemate

A9Common-ModeRejectionTest
AC Normal-Mode
DcVoltmeterlnput

Resistance

AcVoltmeterlnput

ImpedanceTest.
(Option04OlO45)
AccuracyTest..

Sample/Hold Response

ExternalReferenceinput

ResistanceTest..

General

Test Procedure

Model

AdjustmentProcedures...
DCZeroAdjustments..

ReferenceAdjustments...

DC

Amplifier

ACCorrverterAdjustments

lVRangeAdjüstments
l0VRangeAdjustments
100

OhmmeterAdjustments..

Offset
Offset
Dielectric
Response

Ratio

Introduction
Orderinglnformation
Non-Listedparts

ProprietaryParts.

Method

Test

Performance

Accuracy

Operational

Test Procedure

Using

98204

Calcrilator

Adjustments

V

Range

Aäjustments

Gain

Adjustment

Adjustment

Absorption

Adjustment

Reference

Adjustments

Rejection

..

Test

Tests

(Option

Check

.

.-.

.

Adjustment

......

.

rABLE

Test

..

030)

.

......5-14

.......5-15

......s-15

......5-16

. ..

........6_l

OF

CONTENTS

Page

. .

... .5-2

......54

......54

....

.54

.....S-5

.....5-5

......54

...

..5-6

......5-7 711.

.....5-g

.....5-8

..

.5-8

.

. .

5-l I

. . .

. .

l

5-l

.....5-14

.....S-15

.....5-15 !'t7'

.....5-16

.

. .

.

5-16

.....5-16

.. .5-16
. . .5-17

.

.. .5-17

..

. .

......6-I

.....6-l

.....6-l

S-iA

.5-lg

page

...6:l

t^'

r.

(Cont,d)

Section
VII.

SCCtiON

VlI.

TROUBLESHOOTING
CIRCUITDIAGRAMS
7-1.

7-3.
7'5.
7-7­7--9.

7-13.

7-15-

7-17­7-22.
7-25.

7-27.

737'
!19

t4z'

- ,6 _

t4ö-

7-50.

t-)2'

!-)5'

1-t?'sample/HoldSJrvicing
!-bu'

743'

!t2

t4'1.

749-

7'73.
7-75.
7'77.

BACKDATING
g_1.

g_3.
g-5. partsNotUsted.

Introduction

Preliminary

TroubleshootingTrees
Access
PowerSupplyChecks
DCAnalogCircuits

,{2
DCAmplifierChecks
DC
ReplacementofQCR3Ol

A-to-D
IntegratorTroubleshooting

OhmsConverterTroubleshootlng.....74

DisplayTroubleshooting
LogicTroubleshooting

Suggestions

Data

(Option

Remote

(OptionO22)

GPIBTroubleshooting

(Option030)

GeneralChecks
ExternalTriggeiCircuitCheck.
AccesstoSample/HoldCircuits

Operating

Sample/HoldAssembliesRemoved..T6
Sample/HoldTroubleshootingTrees...T4
Ratio

External

Checks

Reference

SchematicNores.

Logic

Introduction

Change

AND

Troubleshooting

for

Servicing

Assembly

Amplifier

Conversion

Output

Control

Troubleshooting

Gate

....

Sequence

Exchange
Switching

Circuit

..

. . .

Troubleshooting

O2l) .

Troubleshooting

.
.

the

3490A

Reference

.

Polarity

Symbols

Amplifier

Logic

.......7-l

...

...

........7-l

........7-l

.......7-2

Circuits
Checks

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

with

Checks

.
.

..........74

. . .

.....7-5

.....'l-5

......7-s

.....74

........74

.....74

. . ..

.....7_g

.....g_l

........

........g_l

page

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

..

. .7-l

....7-2

.

. . .

.7-2

. . .

.7-3

....7-3

..

. .7-3

..

.7-5

. .7-5

. . ..7-8

.

. .

.7A

. . .

. 7-8

.

. .

.7-g

PAgE

... .8_l

g_l

APPENDICES

A.

Code

B.

Sales

List

of Manufacturers

and

Service

Offices

Table of Contents

Model 34904

LIST

OF

Figure
2-1 . Line Voltage Selection . . .2-l

PowerCordConfigurations .... .......2-l

2-2.

2-3. Model3490ADimensions ......2-2

24. Installation of
and

2-5.

Data OutputConnections, Option 021 ........24

2-6. Remote

2-7. RearlnputConnectorandCable .......2-6

2-8. Interface Bus Cables
2-9. General

2-10. Tigger Connections, GPIB Option 030 . . .. . .

2-l I . Trigger Connections
3-1. Front and
3-2. Connecting the Guard .
3-3.

OhmmeterlnputConnections . ........3-5

34. External Trigger
3-5. Option
3-6. Remote Program
3-7 . Position of Jumper

Mother
3-8. Timing Diagram,
3-9.

Timing Diagram, 3490A

3-10.

Example ofMarked CardProgramming

3-1 l. Typical Response to

InputVoltage....

3-12.

Di$tizingaRamp

3-13. Using Delayed-Sweep

RampLinearityMeasurements
3-14. Filter
3-l 5.
3-16.

4-1

. Dual-SlopeIntegration

4-2. BasicDiagramandOperation.....

4-3.

44.

4-5.
4-6.
4-1.
4-8. Block
4-9. TypicalStateMachineBlockDiagram
4-10. Block Diagram,

4-l l. Block
4-12. Block Diagram,
4-13.

4-14.

4-15. Input Bias
4-16. ReferencePolarityLogic.
4-17.

418. DataOutputTimingDiagram(Option02l)
4-19. Remote

4-20. T1'pical
4-31. SampleiHold

-1-ll.

Output Measurement

Measurement

RatiolnputConnections.

SimplifiedDiagram,DCAmplifier

Measurement

Simplified Diagram,
Simplified Diagram,

SimplifiedDiagram,OhmsConverter..........4-8

Diagram,

ASMFlowChart.

Diagram,

Simplified Diagram, Reference

and Ratio

Simplified Diagram, External

Reference

PowerSupplyBlockDiagram

(Option

\\'aveforms

Track'Hold\{ode.

Isolated

Remote

Input

Connections, Option

Purpose Interface Bus

Rear

Printout .

021

Board

of a Step

Sequence

Circuits . . .4-13

Circuits

Compensation

Control

022)

Bus

System

Circuir Position .

Illustrating 7-21.

BCD

Output

Options

Connections. . . . .2-J

S/H Option

Panel

Sequence

Sequence

Assemblv A31

3490A

Clock and

Main

Main
Qualifier

Timing Diagram 7-18.

. .....4-19 7-19. Reference Desigrations

(Option

(Option

Wires on Outguard

Addressed
Addressed

a

Step

Oscilloscope

Input

Integrator Circuits . . . . - . . . 4-6

AC Converter

Counters . . .

Logic

Circuits . . . .4-11

Logic

Multiplexer

. .

...

.

. .. . .. .2-3

022 ...

045 . . . -

020) ...

022) . . . . . .3-7

to

Listen . . 3-l I

to Talk

. . . . . .. 3-15

in

. . ...3-20

.. . ... -

. . . . . . . . . .

Page

. .

. . 2-5

. . . .2-6

. .2-8

. . . . . .

. . . . 3-0

. .3-2

. .. . 3-5

. . .3-6

. . . .3-12

..3-18

.....3-19

. . . .3-2O

. . . 3-21

.....3-21

...4-1

.....1"2

......4-3

.44

. .4-7

.4-9

...4-g

...4-10

. .4-12

.

.

4-14

. . .

.4-15

.....4-15

.....4-16

...4-18

. . . .4-20

.4-22 and Switching

..+22

ILLUSTBATIONS

Figure
4-23.

Waveforms

Acquire/HoldMode.

4-24.

Simplified

Operationof

4-25.

Simplified Diagram

4-26.

Aebctric

4-27.

Sample/Hole

4-28. Block

andTriggerCircuits

4-29.

Sample/Hold

4-30.

Sample/HoldMeasurement

2-8

3-8

4-31.

Sample/Hold

Measurement

5-1.

AC Voltmeter

AccuracyTest..
5-2. DCCommon-Mode
5-3. AC

54.
5-5.
5-6.
5-7.
5-8. External

5-9.
5-10.

5-ll.

6-1. ChassisParts
G2. BindingPost
6-3.

7-1.
7-2.

.:7-3. Sample/HoldAssembly

14.

iL'

l-5.
j

4. AC Conveiter
7-7 . Ohms Converter Troubleshooting
7-9. DisplayTroubleshootingTree

j-9.

7-tO. I_ofibClockTroubleshooti"ngTree.......l-2317-24

7-l l. Data
7-12. Remote Troubleshooting

7-13.
7-14.

7-1
7-16. RatioTroubleshootingTree

7-17. Locationof Assemblies

7-20. Schematic

Common-Mode
ACNormal-Mode
DCVoltmeterlnput

ACVoltmeter Input Impedance Test . ... . .....

Sample/Hold Response Test .

ResistanceTest.. ....5-9

Location

Standard3490A
Location of
Location of Ratio Adjustments

SwitchAssembly

Switching
SwitchingOutputsofAlU4Ol

deneralTroubleshootingTree
DC Ana1os Troubleshootins

Loeic Test Troubleshooting

Output

option}2l

option
GPIB

Option 030
Sample/Hold

Tree . .

5.

Sample/Hold

Tree ..

3490A Block

Schematic

Tr,roDetectCircuits,Al ...

Illustrating

Diagram

Absorption

Diagram

Reference

of

Inputs to A2U2 .

022

I/O

Troubleshooting

Diagram,

Diagrant,

and

S/HCircuit

of

Logic Block Diagram .. .

of

S/H Timing
Trigger Timing . . .4-26

Simplified Diagram

Sequence

High Frequency

RejectionTest
Rejection Test . .

RejectionTest .. ..... 5-5

Input
Adjustments,

Sample/HoldAdjustments

.

Assembly

Troubleshooling Tree

Troubleshooting

..

.

.
. .

General Troubleshooting

Troubleshooting

Logic

Diagram

DC Amplifier

Circuits,

Integrator and

A..

Circuit

S/H

Compensation .

Sequence

Resistance Test ..

....

Tree .]-1317-14

Tree

Tree,

Tree,

...

.. .....7-38

Al, A2

..

B . . . . .. ..

. . . . . -

..

and

....7-ll17-12

. . . . .

Tree . . .7-17

....|.-1917-20

Tree

Page

......4-22

....4-23

.4-24

4-25

. .

....

.......4-26

..

. . . . .. .

..

.......5-18

......G31

........1-3

........7-7

.

..1-2517-26

. .i-2717-28

.

...74117-42

4-25

. . .

-...+28

....+29

.....5-2

.....5-3

. .

.54
. 5-5

5-6

-

. .5-7

....5-14

.....5-17

..6-30

...6-31

.

. .7-3

..

i,-1511-16

17-18

.7-21

17-22

.7-2917-30

.1-31

17-32

.1-3317-34

....7-35

....7-36

. .7-37

.7-391740

'.;

Model3490A

Figure

7-22.

Schematic

Ratio

Circuits,

7-24.

Schematic

7-23.

Schematic

andCounters,Al

7-25.

Schematic

7-26.

7-?7. l+e;atic

7-28.

222. l*"

7-30.

7-3I.
7-32.
7-33.

Logic,Al

Schematic

41,

A8

Schematic

Range,

atic

Schematic

Schematic

- _Circuits,

khematic

Option

^ .

Schematic

Option

Diagram,
Diagram,

022,

Diagram,
Diagram,

Diagram,

Diagram,
Diagram,

Diagram,

Diagram,

and

Dagram,
Diagram,

Diagram,

Ag,

021,

Reference

Al,

Al3

Main

Clock

..

DC

.....:.

SampleRate

Switchins

power

?ror"r,

Function.

AC

Converter,

Ohms

External

A2),

A2g,

Data

A9,

A10,
Remote

AII,

AI2,

and

Logic,

Al

Suppli€s,

o,

:.

Switches,

e.S--.

Converi"r,

Trissei'

A37:.
Output
Al5:

Ali

tnpui

.

.

-'

LIST

0F

7431:144

.

.

. .

.745;1746

...7_47174g

' -

-

.

. .

.

äl',i_]l

AS

.7_5517_56

.

.7_5717-Sg

--'

X

.7_5917_60

j_6117_62

.

'

.

'

.

.7-6317_64
.7_651746

tLLUSTRAT|0NS

Page

7-3

7-38.
7-39.

740.
8-1
8-2.

(Cont,d)

Figure
7-i+.

schematic

7-35.

7-36.

.

AnalosCircuits,

Schematiö

LogicCircuit:,12S...

Block

I/O

7.

schem.li;;i;;;;;

and

Schematic

Assemblies.

Schematic

and

Schematic

Mother

Component

l2ltA0[55and.Lowr;

Schematic

Seriat

Diagram,

Diagram,

Dagram,

Circuits
ROM

ROM

No.

.

Assy,s,

Diagram,

A30,A35

Diagram,

Assemblies,

Diagram,

Board,

Location,

Diugru.,

r2lr/r}fiss

sample/Hold

A27'

Sample/Hold

3490A

GPIB

ii*,.

A34,

GpIB

Outguard

A32,

OutluarJ'

fil

.:

41

1,

Al

I

Assembly.

.......

.

..

p;;;;;''

A36

:.

Isolation

Serial

anJi;;er

.-.-.

-.

Du;;

A33

No.

.......

Table

ofContents

.7_671j_6g

...7_6917_70

-7

-

.

.

7

.

. .

.7_7317_74

.

...

.

.7_7517_76

7_7717_78

.

.7-7glt_80

...

......

.

1

.

t

Page

-7

i

2

8_3

84

Table
1-1.

Specifications

t-2.

c.n.turrnior*;!;;

|

Option

?

General

?-?

MaximumVoltages

l-1

Sample

1-?.

3-3.

Dstortion

ohil"a;;a;;;;i

11

cfln

2-:

3-6.

Address

3-7.

Programü;..

3-8.

Abti,ty;iöör6l"rä,oic,iirl'

3-9.

Initiating

_.

3-10.

Maximum
^ fiTr

3-1

1.

Ratio

+1.

AC

+2.

Porariry;R;,t"ü'ä;;.;;;,

+3.

Analog

4.

ecquiie/HoioD;i;;...

050

purpose

Rate

Signal

Codes

a

Ramp

byExternalTriggering

for

Polari

AdiG;;üffi'"

Tests

......

and

QRtion

Interface

andResponr.

Error

Mnemonics

. ,

or

Sine

-S/H

Acquisiiön

ty

Wave

Measurements

Full_Range

Disolav"

1Sät

.

.

_

...

OAO

Step

:...

pari

Ctran;;,

Brrä;;;täs

iirnr..

::

:

.

:..

......'........3_7

""""3-9

.

tin

gj

Iäput

........

TIST

Page

.

.

. .

.

.2_3

.....2_7

.....3:2

.......34

:.il

.-3-10

.....3_17

.

.

. .3_tg

"'3-21

.....

frz

"'4-16

4-22

OF

TABTES

5-5.
s6.
5-7.

5-8.

s-e.
5-10.
Gl.

-,^..

7-1.._.

T2

7-3.

71
T:

74.

7-7.

8-1.

Table

Gain

Delay

!-5.

5-1.

Recommendear.rt

5-2.

DCVoltmeterAccuracy

5-3.

ACVoltmeterAccuracy

54.

Ohmmeter
Alternate
sample/HoldDCeccuracyäL;":

DC/DCRatioAccura.v
AC/DCRatioAccura"yf.ri

powerSupplvvoltü;;
Ohmmeter'Adjustment

Replaceabtepärts..

power

CurrentLimitValues
PowerSupplyJlTp"rwires
AC

Reed
component
Data

Output

Alphabetical

Atphabetical

I/OMnem.oni.,

ManualBackdatinlih*;;;

Relationship

Accuracy

Ohmmeter

Supply

Voltages

Retay

Chäcks

Spacing

.irouUierhooti"g

J,istins

Listini;itrö;ä;ö'

...

nq'uip.;;;

Accuracy

färi-.

:1.'..
.

.

......:...::.....

and

.-.

"f

34tö;

:

.

.

.

. .

.

.

.

.

:-.'..

::.............

...................

Test

.

.........

..

:...

:.............

-...

.......

. .

.

.

. .

.

:

:

..

..

np,

.....-.'_

.........

. .

..

.....

ü;rmonir,

....7_7117_72

.

.....s_6

.....

....

.

.

..

..

.....6_2

......7_1

...7_2

.

.

.

. .

.

...

.

.

....8-l

,^X

.

.

.

5_0
5_l

5_3

.

. .

5_3

.

5_7

5_8

s_ls

.5_16

.

.74

.

.74

.7_to

vll

Model

34904

sEcTt0N I

GENERAT INFORMATION

Section

I

lNTBoDucTl0N.

1.1.

l-2.

resistance

voltage,
tion.

l2O%
ranges.
Range
on
output,
ments,

1-3.

instructions
Model
procedures
Procedures
to its
the
tion

14. This
mance specifications for the Model 3490A
available options. It

with the

are available.Instrument

mation is

1-5.

l-6. Table
critical
Table
operating

l-7.
turing,
Bureau
sheet
change
ing

r-8.

l-9.
usefulness

and

capable

is

It

range

of

Polarity
selection
functions.

all

remote

ratio

and

manual

This

as well as maintenance

34904 Multimeter.

for

are also included

performarice

theory

of operation, and troubleshooting

provided

are

section

Model

also included.

SPECTFtCATI0NS.

l-l

specifications

l-2

contains
characteristics

Any

change

design,

of

Standards

included

specifications

sheet

with this

supersede

0PT|0NS.

The

following

of the

measurements

of overrange measurements

on all except the 1000V

selection and

is

manual or automatic

Options are available

programming,

measurements.

contains installation

Instrument

verifying

for use

3490A

is

in

or traceability

of rhe

Model

proper

for adjusting the instrument

specifications.

in

maintaining

the manual

of

lists

also

and

and manual

a complete list

that

are controlled

general

information

the

of

the

specifications

will

be listed

manual.

previous

all

3490A.

options

3490A:

are

3490A Multimeter

Model

The

makes

with 5-digit

display are

to

sample-and-hold

information

specifications

operation

Schematic

the instrument.

contains the

the accessories supplied

additional

Model

to

The manual

available to

accessories that

identification infor-

of the

that

3490A.

due to

the

on

a manual change

information

voltage,

ac

ac and

automatic.

over all ranges

provide

and

are

and lists the

Model 3490A
by tolerances.

describes the

U.S. National

and manual

extend

dc

resolu-

up to

dc

data

measure-

operating

the

for

and

included.

diagrams,

informa-

perfor-

manufac-

concern-

the

Option 040 or 045:
Option 050: 34904

power

source

Option 060:

Option 080:
I-Ill. ACCESSORIES
l-ll. The

Model 3490A

Supplied

Rack
PC

Supplied

Rear input
36-pin

5Gpin

Remote Jumper
PC

Supplied

with

Mount

Extender

with

connector

(mates

connector

(mates

Extender

l4-pin

connector

(mates

Remote
Rear input

PC Extender (2

Supplied

S/H Analog

.-'

S/H Logic

PC Extender (2

Supplied with

S/H Analog
S/H Logic

PC Extender

l4-pin

connector

(mates

Supplied

Ratio

Jumper

PC

Extender

3490A
power
Ratio

following

and its

accessories

option

all instruments:

Kit

(2

x l8)

Option 020:

cable

with Remote

with Data

with

Output connector,

Assembly,

(2x22)

Option

with Trigger
Jumper

Assembly,

cable

x 22)

with

Option

Jumper

Jumper

Assembly,

Assembly,

x l0)

Option

Jumper

Jumper

with

with

Assembly,

(2

x l0)

Trigger

Option

Assembly,

Assembly,

(2

x l0)

source

SUPPLIED.

connector,

030:

connector, Jl l)

040:

045:

connector, Jl l)

080:

Sample-and-Hold

designed
desigred

for operation
for operation

are

shown.

as

J7)

A.4

supplied

J6)

44

A24

A25

A24

A25

A26

on

50

Hz

on

60 Hz

with the

03490-84401

5060-s983

o349Mt612

l2sl{084

-0086

I

2s I

03490-66504

5060{630

12514142
0349U66504
0349041612

5060{630

0349046524
03490-66525

50606032

0349U66524
0349046525

50606032

12514142

0349046526

5060-6032

Option
Option

Option

Option

020:

BCD/Remote

021:

Isolated

022:

Isolated

(Options

Option

030:

General

(GPrB)

Expand

Data

Output

Remote

021

and 022

020)
Purpose

(BCD)

Control

require

Interface

Bus I/O

1.12.

ACCESSORIES

l-13.

Several
Model 3490A.
Option
panel

symptoms

accessory provides

705,

accessories

A

service

will

demonstrate

to isolate

AVAITABLE.

are available

video tape, Product

use

failures.

a set

of IC reference

for use

No.

of self-test

The

-hp
boards with

with the

90030C

and front

111261^

1-t

Section I

Model

3490A

most

of the 3490A logic

lO529A
Logic
without

-hp­contains

such
Three

030. These

A
available
face
No.
or
for
numbers

Logic

Comparator. Using these

Comparator, a faulty

removing it from the circuit.

11127A, is

the most

integrated circuits,

as

interface

GPIB Repair

Bus I/O circuits.

562A-16C,

50554, Printers. Field

units

cables are available

cables

l063lA Interface
10631B Interface
10631C

for troubleshooting

for use with

with Option

Ill2lA and I I l22A

IC's for

IC can

be isolated

available for

critical components

identical

are

Interface

-hp-

Kit,

Also

installable

O2O are

the 3490A.

transistors

except

cable,3 ft.

cable,6

cable,

Part No.

the

General

available is

Option

Options

available by

respectively.

use

with the

boards with

in seconds

A spare

for the

for length.

12 ft.
0349G80009,

021 and *rp

parts

of

the 3490A

and

reed relays.

GPIB Option

ft.

Purpose

a cable. Product

O2l and,O22

accessory

This

lnter-

50508

-hp
the

set,

set

1.14.

INSTBUMENT AND

MANUAL

IDENTIFICA-

TION.

Instrument

5.

l-1
located on
two-section

prefix

designating the

manufactured.

J

l-16. This
numbers

been made in the instrument

is

printed,
the
these changes

Section

serial
Part

the manual are

and a

=

Japan;U

indicated

a

manual

VIII

numbers lower

numbers

manual

"Manual

identification

the

rear panel.

serial number consisting

five-digit suffix

country in

=

(A

=

United Kingdom.)

will define these

your

in

adapts

for the manual

also

U.S.A.;

applies to instruments

on the title page.

Changes" supplement

manual. Backdating information

the

than

that shown on the

shown

on the

by serial number

Hewlett-Packard

separated

the instrument

which

G = West

since this

changes. Be sure

manual to instruments

the

and

title

of a four-digit

by a

Germany;

with the

If

changes

manual

supplied

to

title

microfiche

page.

uses

letter

serial

have

with

record

with

page.

copy

is

a

was

was

in

of

l-

Model 3490A

VOLTAGE

DC

Full-Rangp

Overrange: 2O % onall ranges

Aeuracy:

24 hours

{23oc

30 days

(23oc1soc)

90 days

(23oc

6 months

{23ocisocf

year

1

{23oc!soc)
Temperaturo

O.1 V

'

1V

Voltage

reading.

Effectlve

either

AC:

DC:

AC Normal{Vlode

Option

Option

Input

O.1,V
100

AC

VOLTAGE

Full-Range

Overrange:

ttTlgnt

10'

Accuracy:

lnput

Guard

24

hours

(230

C r

3)

days

(230Cr50c)

90

days

(230C150C)

6 months

(23()C15()Cl

ye€r

l

(230c+5()Cl

I

Frequencies

l0

Display:

t

l%

!

loc)

r5()c,

Coefficient

Range: t

range)/o

+

Option

Option

!O.l%
to.1

Resistance:

V

nnximum

10

C

through

0.OO03

Coefficient

Common{lode

loadf:

O5O

50H2t0.1

060

6OHzt0.1

)

140dB

05O
060

%

through

and

lü)0

Display:

2O%on

Rango:

x

l%ot reading

levels

above

must

be

20

Hz

0.32+0.05

cl

0.35+0.05

0.35+o.os

0.4

0.45+0.07

ranges

greater

only.

V

% of

(5O

(60

10

Volt-Hertz

connected

.

:1P9P.Y

i

I;IBBBB V

reading +

of

.1 V

(0.005

t

(0.01

I

(0.01

!

(0.013

r

(o.015

t

(0o

(0.00,l

1OOOV

rangelp
I 000

{

(SO

Hz

%

(@

Hz

%

Rejection

power

Hz

power

Hz

V

ranges

V ranges:

I.OOOOO

10.0000

100.000

1000.00

all ranges

20

Hz

to

1 % of

+0.06

than

except

1000

To

of rangel

Range

+

0.001

)

+

0.005)

+

0.005)

+

0.0051

+

0.0051

C to

50o

Cl:

%

of

reading

Ranges:

C

V range)

Rejoction

:

t

power
power

frequencyf:
frequency):

(<

70%

10

MO

V
v
v
v

except

250

kHz

product

% of

range)

range

to

Low

50

Hz

:

Add

(with

frequency):

frequency):

R.H.):

I

O.1S

IOOO

(Guard

lO.oo+0.025 |

+0.025

lo.r

+o.o2s

lo.t

o.r

+0.03

|

o.tz+o.o3s

|

lO0

kHz

Table

r

10O.oOo

.

rooo.öö

1V-f00{,VRangas

r(O.OO1

0.04

%

V

100

v

v

V

range

(0.004
(0.008

+

(0.01

+

(0.013

+

(o.015

+

+

0.0007

% of

ppm/vott

1

kf,l

imbalance

)

140

)

140d8

>S0dB
>

50

dB

>

2

-

x 1010

range

shorted

to

kHz*

2SO kHz

0.7

+0.06

o.zs*o.oe

|

+

at
at

lo.zs*o.oo

o.zs*o.oz

|

0.7s+o.o8

|

specified

on

1 V

1-1

O.OOI

0.0021

0.0021

0.oo2l

0.oo2l

%

reading

to

% of

dB

50

Hz

60 Hz

O

Low),

and

.

Specifications.

Temperature

Voltage

Input

)

OHMS

Full-Rangs

of

Overrange:
Accuracy:

24 hours

in

(23oc

30

days

(23oc!socl

9O

days

at

l23oc!50c)

6 months

{23oc

at

year

I

Temperature

0.1

1 kO

DATA

OUTPUT

BCD

internal

REMOTE

Remote

code.

reading

Coefficient

kHz

to

% of

lmpedance:

2 Mf, t

(

65

<

90

Display:

.100000
l.oo000

10.0000

100.000

1000.00
10000,0

2O

+

0.006

1

loc)

0.O12 +

0.012
o.ot

t

socl

0.018 +

Coefficient

ko

range:

range)P

through

and

10,0O-0

of range)/"C

1-2-4€,

sl,rritch

nput

I

Signals

Output

Signals

CONTROL

programming

I nput

Signals

Output

Signals

Coefficient

+

0.001

%

of

range)F

(1000V

reading

1 %shunted
pF

without

pF

with

ke
ko
ka
ko
ko

ko

% on

(%

+

0.001

o.OOs

+

o.oo5

+

5

0.005

O.OO5

C

(Optaon

High

rear

-all

of

reading

(O.OOI

!

t0,0OO

kf,!

ranges):

OZtl

true

High

by:

rear

input

ranges

0.005 +

O.01

0.012

0.0t5 +

0,018 +

(0o

kf,l

or

Level

+3.9Vr1.5V,

100pA

V r

pA

4O0

(Option

of

High

Level

circuit

pA

max.

1.5

rnax.

0221

range

max.

nrax.

+3.9

+3.9Vt15V,

100pA

open

+3.9Vr1.5V,

40O

C to

l0o

C

range):

input

terminal

terminal

oÄ

+

of

rangel

0.001

+

0.002

+

0.002

0.002

0.002

C to

50o

%

of

ranges

(O.OO1%

r

Low

true

+0.3v

V,

+0.3vr0.3v,

and

function

+0.3v!0.3v.

or

+o.3V

50P

Cl: r

Add

0.01

0.007 +

0.001

o.0t2

+

0.002

0.0'l5

+

0.002

0.02 +

0.002

0.025 +

0.002

C):

reading

(<

70%

R.H.

ot

reaaint

logic

code,

Low

Leval

t0.3V,

2

mA rnax.

15

mA

max,

uses

Low

Level

2 mA rnax.,

contact

closure

ground

to
through

< 300

r0.3V,

15

mA

nnx.

(0.002

ppm

0.025

0.035

0.035

0.04
o.05

+O.OO07

on

1OOO

i

O.OOOSX

selectable

|rigrh

true

or

o

Section

%

per

Volt/

+

0.ool

+

0.002

+

0.002

+

0.o02

+

0.002

%

of

kj_l

by

rogic

I

of

l-3

Section

I

Model 34904

RATIO

Measurement

Ratio

3 wire;
External
respect

External

DC/DC

(Ao/o

!

(Option

0801

Input

External

to

Reference

Measurement

of

Reference

Reference

Low.

lnput

Reading

hours

24

3o days

9o days

6

months

year

1

Configuration:

High

Ratio

Resistance:

Accuracy:

r

Bo/o

(23"C

(23"c

(23"c

(23oc

t

123oc

Low

may be

=

of lnput

I

1"c)

r

5"c)

t

s"cl

r

s"cl

5"c)

is conlmon

positive

nput

I

Ext. Ref.

> 107O

+

Range

Ext.

Range

tov

1V

10v

10v

10v1V.007

10v

Table

with Input

or

Ext.

­Ext. Ref .

Ref.

1V

1V

1V

1-1. Specifications

External

Low.

negative with

Input Ranges:

Ref. Range

Voltage

xC%of

1V

A B

.003
.o03

.oo7

c

.oo2

.001

.002

.002

.005 .0m

.008.015.003

.002

.oo5

.o07

.015 .003

.008

.002

.005

.003

.015

.008

.o15

.002
.o04

.o07 .005
.008

(Cont'd).

/

Reference

1V:1O.1

tlVto112V

10V:

V range

{1

is between

voltage

V

o.1

DC:
AC:

1 V

Input

.002 .001
.002

.002
.o03

.002
.o03 .012

.002
.003

.003
.004

to 1000

Range)

lnput

A

Ranges:

Vtot1.2V

be used

should

to

1V,

1000

V

Range

10V

B

V and

1

V

c

.oo2
.002

.002

.002

.003

.003

.012

.002

.003

.OO3

.oo2

.003

.003

.012

.002

.o03

.004

.012

greater

for

V.

1.2

100

A

.003
.005

.005
.006

.006
_007 .01

.007
.008

.008
.o09.012.OO4

accuracy

v, 1000

B

.001
.003

.003
.o12

.o03

2 .003

.003
.012

.003

the Ext- Ref'

if

v

c

.002
.002

.002
.003

.002

.002
.OO3

.o02

Notes:

1.

2.

DC/DC Temperature

!

Reading + %

of

lo/o

On the
EMF's
accuracy

Coeff

Ext. Ref.

Range

'10

lOOO
generated

specified

icient:

of Input

v

1V

Measurement

DC/DC

Voltage = 0.5 V; Input

lnput
Ext.

Ref.

spec.

30 day

Ext. Ref. Range

Ext. Ref . Voltage

Ratio Reading should be 1.00000

0.003% of Reading
O.O12% of Input Range

x o.oos"Ä of Input Range= 6

*

.5V

Total rror tolerance

Display should be

Accuracy

Voltage = 0.5

=

(0.0037o

t

V; Ext. Ref .

x 0.003% of Input

0.99979

V range, add

external to

utilizing

by

Range)/-C

r

{0.0003
(0.0004

r

Example:

Range = 1

of Reading

Range = 1

=

3 counts

:

counts

12

counts

=

counts

21

to 1.00021

0.04

1V

V

+

O.O12%

Rangel

PPM/volt

34904

the

panel

rear

the

+

0.0007}

+

0.0021

V

of lnput Range

to the %

of reading

b9

{lay

ThermafAdjust

specification'

cgmpensated

provided'

lnput Range

10V

1V,

(0.0001
(0.0002

AC/DC

V Ext.

10
1 V

24 hours
30 davs

{See

AC/DC

10V

coefficient

1 V

temperature

(See

+
+

Measurement

Ext. Ref.

Table

Temperature

Ext. Ref.

Table 1-1

r
r

to achieve

0.00041

0.0021

Range: Same

Ref.

Range:

123-C

to 1

Voltage accuracy

AC

Ext.

1-1 of

Ref.

Range:

of

main

Coeff

coeff icient

main 3490A

of

%

the

100

(0.0005

=

(0.0006

t

Accuracy

year

Range:

:

^

t

1-C)l Same^as

Q3-C

34904

icient:

Same

0.001

Add

specif

range

v,

1000

+

+

AC Voltage

as

x

5-C):

manual.l

as

to

ication

manual.)

v

0.0004)

0.002)

aocuracy

Voltage accuracv

AC

o.01

Add

Voltage

AC

o/o

ol Range

to % of

temperature

Voltage

in AC

Rang

tt
t-

Model34904

Section

I

SAMPLE/HOLD

Full-range

r

1.00fi) v

+

10.q)0

!

100.00

r

1000.0

(OPtion

Display:

v
V
v

Ovrrangs: 2O%on all

Maximum Input Voltages:

Between Input High
Between

Between

Between O Signal High and
Range
Maximum

either

Low terminal

Guard and

Seleaion: Manual,

Function

DC

Volts

AC

Volts

Reading

Rate

Ohms

.1 kto

100

k

1,000

k

10.oo0

'Sample

not

Response

coincident

DC
ACVolts:
Ohms:

Ohms

Maximum

Nominal

Overload protection:

Power

10o

Power

Environmental

Operating
Humidity
Storage

k

Rate

in

Volts:

0.1
10O0
10,OO0

Terminal

25 V
1 3 V

O.1
100
10,000krange:

Nondestructive:
Fusedestructive:

Raquirements:

v,

Consumption:

Control

owrload.

(to

Time

with

encode

(

200

<lsecond

k

to 100

k ranges:

k range:

k range:

CharacteristiG3:

voltage

in

overload

for

valid

reading

current

k to

kand

120

Temperature:

through

10 k

ranges:

1000

V

,22O

Characteristics:

Temperature:

Range:

within

ms

(

across

<60

(

040/0451

Sample/Hold

digits

range5

and

Chassis:. 4

autornatic,

(Minimum

Option

measurement

plus

overrange

except

Low: t 10O0

and

Guard: I

500 V

Low: t

or

Sample

050

240.2ms+5ms
+

1.26s

.025s

24O.2ms+5ms
3O0.2ms+6ms

set to FAST

rated

triggerl:

(

200

ms

5SO ms

unknown

unknown

.l

mA

rtA

r

2SO

V

r

10OOV

or

24O

,

VA

Oo

C to

% relative

-

2Oo

C

+

12

accuracy

ms

pA

10

y

l+

with

5Oo

humidity,

+

to

ms

resistance:

resistance:

5

%,

all options

75o C

66O.3 ms

2S0

(

k ranges:

l

V

g5

"1 ",

IOOO

Vrms

250

Vrms

Remote

periodr

200.1

1.05s

20O.1

250.1
55O.2

position

for

-

1O %l;

C

Table

displar/

V range.

Table 1-2.

(1

1500

200 V

(Optionall

per

Readingl:

Option

060

ms+4ms

+

.025s

ms+4ms
ms+5ms

*

ms

and instrument

a

step input

48

Hzto

Oo

C to

4Oo

1-1.

Specifications

is

4 full

General

peak)

V

10 ms

applied

.:

44O Hz

C

(Cont,d.)

Sample/Hold

1ü)0 V

24

hours

30.days

90 days

months

6

year

1

1230 c

Temperature

reading

+

Information.

GENERAL

All lines

Input

Output

GENERAL

SAMPLE/HOLD

Acquisition

Aperture
/''

Sample/Hold

PURPOSE

are

HIGH

true.

Signals:

Each

input

ground,

to

Signals:

Each

output
open-collector
out-

isolated
and chassis
maximum

Range

Time
command
Hold

model:

Track/Hold:

ation<t10ns.

Acquire/Hold:

1V,

100

10

Sample/Hold

V ranges

V, 1000

$Tp]9/!9!d

HIGH
Signal
Must

edge
amditude

Drior

2

1ts

Measurement

ranges!:

(23o

r

c

(23o

(23o

(239

0.0O1

10

r

c

so c)

r

c

so

r

C

r

so cl

Coefficient

% of range/o

So C)

INTERFACE

LOW true

line is terminated

and

one

can

drive 15

driver

PURPOSE

from

inguard

{power tine)

of

40 V

above

(Settling

Time

Maximum

(Delay

betwsen

receiwd

h

(

400 ns

ranges

V

Trigger

I nputs:

TTL

2.4
be HIGH

capable

AC

Trigger

pulse

a

of

2

to

negtive-going

Trisser
V) to

of

V to

()+
must

be

of

Accuracy

c)

c)

(04

C to

C).

except

TTL load.

GplB loads.

capable

INTERFACE

circuit

common

ground

chassis.

tam6

for a f

within

sinking

at least

Acquisition Time

0.Ol % of Final

the

and

the time

(typically

t

615

rls

154

t

6

(dc

coupted):

LOW

{<+

at least

I mA.

(ac

coupled):

2O0

V.

transition.

(DC

(%

t

of reading

BUS

HRFD

with

3 kslto

of sinking

BUS

ult+ange

function,

r

{0.01
(0.01

r

(O.01

r

(0.02

r

(o.02

I

50o

C)r

LOGIC

and HDAC,

(input

and

I V through

oÄ

+

+0.0151
+

0.015)

+

0.015)

+

0.0151

+

0.015)

t

!O.OO2 % ol

LEVELS

+

S V

The

output

4g

mA

(ourguard)

Low terminal!

may be

inputl:

slep

oI

which

and

ground

floated

to

Value

time

a

Sample/Hold

Amplifier A entors

22O nsl; cVcle-to_clrlcle

4O0 ns
40O ns

0.4

V}

ps

prior

600

Negative-going

30 ns

wide

Signal must

512.6

129.4

lnput must

for

r

lls

t

tts

at teast

going

to

and having

be stable

rcngel

6.2 ke

is

at 0.4

Trigger

the

vari-

zl00

4OO

go

from

30

LOW.

leading

at least

are

an

V

is

a

ns
ns

ns.

an

l-5

Section

34904

I

Model

SAMPLE

HOLD

Sample/Hold

Maximum rate of

Maximum dV/dt during

Minimum

AC Characteristics:

tracking:

of range/ps on

2.5 %
range/prs

% of

5

Samde/Hold

1000

Response

Time

time response

The

form

Similarlv,

measured

(CONT'DI

dB

3

!

amplifiersl

Range

1V

10v

v

100

v

Characteristics

can

be

vs/n = vin

input waveform

the

data

change

on

Bandwidth

approximated

the

10 V and 1 0OO

the 1 V

digitization:

:

r

3 dB

of

Sample/Hold

+

equataon:

the

by

of

and 10O

:

Kl

1-2. General

Table

input voltage to maintain

V ranges.

V ranges.

V/t s

50

(external

20
4O
15 kHz
20kHz

FrequencY

kHz
kHz

for

equation:

the

by

dvin

_f,r

can

be

input terminals to

input wave-

any

reconstructed

from

lnformation

dVs/u

RATIO

Range

External
lnput

Ratio

1
10

Polarity Display

+
_

No

Ratio

Maximum
Maximum

(Cont'd.)

Slope
small enough

measurement
linearitV.

=

Velocity

K1

range

Range

1V

10v

v

100

v

1000

Selection:

Reference

Range:

Display:

V Ext. Ref

V Ext. Ref.

+DC/+DC or

for

+DC/-DC or

for

polarity

Measurement

Numerical

lnput

of signal as measured

is as

that the waveform

points

factor. The

follows,

VelocitY

Typical

-

10,rs

-

-

approaches

2,rs
3ps

+7tts

Manual

Range:

automatic,

Manual.

ratio directly

Read

Range:

.

{automatic)

disPlaY

Range:

-DC/-DC

_DC/+DC

for

CaPabilitY

Display:

Voltage:

Multiply

:

AC/DC

:

10O0

in

typical

Factor

remote

or

display

1 20O0O

Vrms

increments

between

or achieves

factor for

(optionall

bv 0.1

any Input

on

each

range

vin = vs/H - rl

Where:

=

Displayed Sample/Hold

VS/n
Vin = 39OA
dVi.

dt

Slope

input

of any

voltage.

portion

dvs/H

dt

measurement.

input

of an

wavefori?i.

Maximum

Input

Environmental

Reading
DC/DC: Same
AC/DC:

Protection:

to 4o:c,

O:C

to 5O"C

O"C

RaE:

for

as

for

as

Same

Vrms

250

Requilements:

(

95%

maximum

dc volt'age

voltage

ac

(t

400

humiditY

relative

operating

measurements

measurements

peak)

V

continuous

temperature

range

t-6

Model3490A

Section

II

|NTR0Dt

2.r.

This

2-2.
necessary

Multimeter.

power

and

mation,

cedures,

INITIAL

2.3.

2-4. This
chanically and electrically
free of mars or scratches

upon

receipt. To confirm this,
inspected
instrument
carrier.
and test the
using the performance
Section V. If
warranty

Check

2.5. POWEB

24. T\e
source

supplying

+

5V),48H2
maximum.
instrument

CTloN.

section contains

installing and

for

Included

grounding

installation

instructions

and

INSPECTION.

instrument

physical

for

was damaged in transit,

for

electrical performance

there is

in

the front

REOUIREMENTS.

Model 3490A

to 44OHz.

Refer

tum-on procedure.

are initial inspection

requirements, environmental

instructions,

was carefully inspected

damage incurred

supplied

of this

can

100

V,

to Paragraph

INSTATI.ATION AN

information

interfacing

interconnection

for

repackaging

before shipment.

perfect

and in

the instrument

file

accessories

of the

test procedures

damage or

manual.

be

l2OV,

Power

deficiency, see

operated

220

Y or 24O

dissipation

3-18

instructions

and

the

Model 3490A

procedures,

for shipment.

both me-

It should

electrical

should

in

transit.

a claim

@aragraph

from

(Section

with the

instrument

outlined

any

V
is

III)

SECTION

infor-

pro-

be

order

be

If the

1-10)

in

the

power

(-

l0

%

60VA

for

tl

D

INTERFACE

IOOV--r

r-

20v-l

I r-r

ilil

Lzqov----l

I

\-22OV

Volts

IOO

l@V-

r-

rzov-l

I a

ilE

L

zqov--]

I

L

220V

220

Volls

Figure

2-1

appropriate
offset pin

2-12.
the

instrument
contact
the

adapter

receptacle,

on the

To preserve

to

power

the protection

from

two-contact

to power-line ground.

'

'-

-1O%,+

90 to 105
108
198 to

216 to

. Line Voltage

grounds

plug

a two+ontact

adapter

nominal

5% of

volts

to 1 26 volts

231 volrs
252

volrs

is the

feature

and connect

Selection.

the

instrument.

ground

when

outlet,

The

connection.

operating

use a three-

the

wire on

2-7.

Before

sure

the
correspond
shown

installed.

2.8. POWER

2-9.

Figure

used

for
above
power
tion.

If

the

instrument,

Office

(|.

2.1

2-11.
Electrical

mends
ed.

The

ductor

connecting

rear panel

to

in

Figure

CORDS

2-2

-hp-

power

each

drawing

cord

equipped

the

appropriate

and

a replacement

GROUNDING

To protect

Manufacturer's

that

the

Model

power

line

the

voltage

2-l

. Also,

AND

illustrates

cords. The

is the part

with

power

notify

the

REOUIR

operating

instrument

34904

cable

which,

power

ac

selector

of

to

the

switches

the available power

be sure

the proper

RECEPTACLES.

the

standard

-hp-

number

a connector

cord is not included

nearest

cord

will be

configurations

part

number
for an instrument
of

that configura-

-hp-

Sales

provided.

EMENTS.

personnel,

Association

panel

is equipped

when

(NEMA)

and cabinet

with a three

plugged

3490A,

are set to

and

the

National

ground-

be

into an

make

line

fuse

directly

with

Service

recom-

con-

as

is

2-13.

The 349OA power

and

mating

forth

,(rEc).

2.14.

2-15. The
equipment
flow

of air
operated
0o

C and 40o

95

%.

between

8r20-1689

connectors

by the Intemational

ENVIRONMENTAL

Model 3490A
if the

around

where

The instrument

-

20o

the
and the

C

C

and + 75o

8t20-r369

@

sT0

"'i,nur"

2-2. Powercord

cord, power

meet

the safety

Electrotechnical

REOUIREMENTS.

requires no special

instrument is

surfaces.

all

ambient temperature

may

mounted

The instrument

relative humidity

be stored at temperatures

C.

8120-t35t

ffi

Gonfigurations.

input

receptacle

standards

Commission

cooling

to allow

may be

is

between

is less than

8t20-r348

W

set

free

2-1

Section

2.16.

II

INSTALLATION.

2-17. Bench Use.

c. Install 03490-60306 Isolated

right opening

provided (see

in

the instrument

Figure 2-4).

BCD

guard

Model 3490A

Module in

using screws

the

2-18.

The Model
tilt stand
The
convenience
tilt
the
Packard

2-19. Rack
2-20.

rack mount kit
instrument.
rack mount is an
mounted
must
dimensions of the Model 3490A

in place, ready for use

front of

stand. The

instrument

instruments.

The Model

using the
provided

be

OIMENSIONS

Figure

2.21. INSTALLATION

2-22.

T}te Isolated

the Remote

349OA

factory with

2-23.

l-24.
Isoiated
to

s:rard.
rnsrrument
Out suard

only if

lsolated

Use the

Data

be installed

a. Remove
b.

Remove

This plate

llotherboard

3490A

the instrument

of operating

plastic

on top

Mounting.

3490A

(-hp-

Instructions

EIA

IX INCHES

ANO

MILLIMETERS

2-3. Model 3490A

is shipped

feet

of other full-module

may

0349G84401)

are

standard

rack mount

at the

OF OPTIONS.

Data

Output

Option 022

the instrument

the BCD/Remote

Data

following

Output. If

at the

top

cover

screws

between

may be installed

0utput

procedure

the Isolated

same time,

and shield from the

holding cover plate

is located

the Inguard

A8.

and viewing

are shaped

rear of the

0ption 021

plastic

with

as a bench instrument.

may

be

elevated

lowering the

by

to permit placing

be rack

included

mounted using the

supplied

with the kit. The

width

are shown

19

of

inches. When

kit, additional support

instrument. The

in Fizure

I

(9r.4)

T_

Dimensions.

(BCD)

Option

the

in

equipped

was

Expand

in left

Option 020.

(-hp-

for installing

Remote

refer

also to Paragraph

3490^.

to instrument

portion

rear

Motherboard

111ZlAl.

option is

feet and

for

Hewlett-

the

with

2-3.

and

021

Model

at the

the

of

Al and

If

d.

Isolated Remote

this

time, install cover plate

opening
installed,
ule in the opening to

Figure

0349U66509 into
between this Assembly
Isolated BCD

03490-66510
between this
Isolated BCD

cables

h. Replace

ment.

2-25. f

2-26.
Isolated

option is to be installed
Parugraph2-23.

b.- Remove screws
guard.
instrument between the Inguard
the

c.
the
provided

d. If Isolated BCD
time, install
opening in the
place
opening

24).

e.

er

Assembly
Cable
the Isolated

f.

0349046512

in the guard.

place

the 03490-60308

24).

e. Insert the Isolated

Connector AlJ8

Module

f. Insert the Isolated

into Connector A8J9

Assembly

Module

g.

Make sure all

are securely inserted

top

shield

solated

Use the following procedure

This plate is located

Outguard Motherboard

Install

left opening in the

the

Remove the

Board ard

W6

Insert

Bemote 0ption 022

Remote option. If the Isolated

03490-60308

(see

Figure

cover

guard.

03490-60306 Isolated

to the

right of the Remote

03490-66504

insert the

0349U66511 into

between

this

Remote Module

the Isolated

into

Connector A8J10 and install

(lll22L)

03490-04117

If Isolated

the left of the

BCD Inguard

and the inguard

(see

Figure

BCD

the

and

(see

Figure 2-4).

boards are

in their connectors.

and top cover

at the same time,

holding cover plate to instrument

in left

A8.

Isolated

instrument guard

2-4).

(11121A)

plate

03490{4117

If

isolated BCD

Isolated

Connector AlJT

assembly

(see

Remote Outguard PC

is not installed

over the left

Remote is

Isolated

24).

Outguard

outguard side

seated properly

Motherboard

is not installed

BCD

Inguard

Remote Inguard PC

and

Figure

Remote

BCD

Module

PC

Assembly

and install

and

(-hp-

for

rear

Remote Module in

is to

Module

the inguard

Cable W4

side

PC

Assembly

install

Cable

of the instru-

11122A1.

installing

Data

refer

portion

Al and

using screws

over the

installed,

be

Module in the

(see

Remote Jump-

and

2-4).

Assembly

to

be

Mod-

(see

of the

W5

of the

and

all

the

Output

also to

of the

this

at

right

Figure

install

side of

Cable

at

Model3490A

Section

Il

(F

I

I
l<-

f---

rffi
|

-J- --\

I'

I ;+CABLE

i

;<-caBLE

t\

-_

cABLE

TSoLATED
MOOULE

f-1

w7

REMOTE

03490- 60308 | 05490 - 60306

rY6

Figure 24.

IO

A8J

aa,rs

ISOLATED BCD MODULE

:

r-l

AI.J8

7

AIJ

Installation of lsolated BCD

OUTGUARD REMOTE

03490-

- -

/

.

___/

Output

665t2

03490-66510

.

l_J

I

­E

and Remote Options.

TNGUARD BcD

JJiJV-99JWt

03490-56511

W4

W7 between
Isolated

g.

cables

this assembly

Remote Module

(see

Make sure all boards are seated

securely

are

inserted in their connectors.

h. Replace top shield

ment.

2-27.

Option 050 and

2-28.

A Model 34904
can
and vice

converted

be

versa.

Only
options. These
input

resistor in

the

correct parts

Table

2-1.

Option

Frequency

Option 050
Option 06O

3.333 MHz

4.000

2-29. INTERFACE

2-30.

Data

0utput

2-31.

Data

shown

in

Output

Figure

Option 060.

Option

to an Option

two parts

are

the Clock

the Integrator

for

each option.

050 and

Crystal

hp- Part

o4100466

MHz

0410{465

CONNECTIONS.

0ption

connections

2-5.

The

and

the

outguard

side

Figure 24).

properly

top

and

050

060

cover

(50

(60

of

Hz

Hz

the

power
power

are different for these two

Table

100

kfi

84.5 ko

crystal

2-1

Part

Changes.

A'1R207

07574465

0@8-4510

Oscillator

circuit.

Option 060

No Resistance +lp- Part No

021.

and logic

measurement

levels

magnitude,

of the

and all

instru-

line)
line)

and the

shows

are

;^.

range, function, polarity
contained in ten
information.
or

LOW true,

the

Outguard

a

Data Flag output

four-bit

This

information

as selected

Data

Output Assembly,

signal is provided
during a measurement
line is HIGH

true.

LOW
in

Figure

inguard circuit

and may be floated

mating connector

._.The

connector J6

true.

while Hold and External Encode

All

input and

2-5. Outguard

common

a

-hp-

is

Output option.

2-32. Remote

2-33.

Remote

levels

are shown in
program
are LOW
Trigger

The Program

040.

to-inguard
Data Flag
sequen@. The
for use with the
output logic

Outguard

inguard
may

be floated

mating

Gontrol

Control

lines

are HIGH true,

true.

lines

are for use

transfer

output

Stretched

levels

ground

common

a maximum

connector

The

Flag

Sample/Hold

(pins
and

for the

and overload information

groups

by the

sequence.

output logic

ground (pin

and chassis (power

maximum of

the

for

Part No.

l-248

of

may be either

BCD coded

HIGH true

HIGH/LOW switch

In

Al0.

goes

which

The Printer

Hold input

levels are

50) is isolated
line)

40 V above chasis.

panel

rear

125l{086

Data

(Amphenol

0ption 022.

input

and

output

Figure 26.

while

Sample/Hold Mode, Delay

with the Sample/Hold

output is

program

of
is HIGH

Pulse

HIGH during outguard-

during a

Output

option.

are as indicated

7, ll

and 12) is isolated

chassis

(power

of 40 V above chassis. The

rear

lines

Range

and

all other

information,

measurement

is

also

All

in Figure 2{.

ground

line)

panel

Remote Input

input

input

is

on

addition,

HIGH

are

shown

as

from

ground

Output

and logic

function

lines

and

Option

and the

intended

and

from

and

:-J

Section

i

7N

3i

LOGIC

Output

Outguard ground
and­40

Printer

information
Assenilclv,

II

-s

t**

LEVELS

LOW = +

Input

Lines:

LOW = +O.3

High

Reference

Low

Referenc€

H

after

signal

L after

signal

chassis

V

above

columns

410'

{JrJ

Lines:

0.3
HIGH = +

(power

chassis.

may

This

ü,1t;

=

HIGH

V r

0J V,

r

V

O.3

=

+

5.3 V

-

{ V

Outguard ground

name

means

narne

means

is

isolated

ground

linel

DIGITAL

numbered

be either

switch

+

39 V t

lS

mA rnax.

3.9 V a
V,

HIGH

LOW

1.5 V,

2

mA rnax.

is

from

is true.

inguard

and

RECORDER

from

right

HIGH

i.u"

must

be

set to

z9

:!
;9eFe

1.5 V,4OO
10O

rrA

true.

circuit

,nay

be floated

PRTNT

to

left.

or

LOW

correspond

TA

OUTPUT

:

qi

z

22

?ä;-;03":'

Y

3 EKBö ?

laEFä=;

g

;

COTruECTOR

oPTtoN

äF cö

i: ^j3

6s

Ed

ä

996<

iää

,^j

-8

5

021

DATA

pA

rnax.

max.

Changes

and

PRINTER

HIGH

sampling

HOLD

Continuous

and

EXTERNAL

common

up

ro

When
minimum

Paragraph

(Using

CODES

columns

true,

as

to the

-hp-

through

1

selected

logic

trr"

50508

5

by

t'he

inprt

.IO

=:==

8885

(Print

FLAG

from

returns

permits

Standard *

print

levei

LOW

to

LOW

HOLD
input

le\rel causes

until

level

LOW

external

ENCODE

"Hold"

ol

mode

24O

364.

numerical

HIGH/LOW

required

Command

HIGH

to
at

completion

returns

to

input

tevel

triggering.

(Trigser)

is selected,

ps

initiates

print

-

or

1248

value

of measurement.

switch on

by

the digital

Mating

Connector:

-hp-

Part

Amphenol

Outputl

at beginning

of a reading

349OA

to

LOW.

disables

autornatic

LOW

one

reading

Wheell

the Outguard

recorder

Model34904

No.

1251€086

No.

57-30500-378

of measuremenr

rycle,

stop

autornatic

sampling

input

le\rel

for

cycle.

See

coded

output

Data

Output

used.

l-r

Dkplay

Multiplit

T,i",,*

DaE
kilohG

Fundid

DC,

Re@te,
tl, BemG,
AC,

Remre,

T6t,

Rmte,

OC,

Remre

N6

0

O.ta

to-r
to-2

to-3
to{
to€

'to€

Ratio

Ratio

Ratio

raG

Rario

lJ.

Data

ex@Fit

HlcH

Data

OCBA

LLLL

LLLH

HIGH

Ragr

8ir

DCBA

LLLH
LLHL
LLHH
LHLL

LH

LH

LHHL

i:

Multiplier giv6

for

Ratio

HIGH

Function

DCBA

LLLL
LLLH
LLHL
LLHH
LHLL

Colqmn

6

Tru.

Print

0

I

Colomn

t

Tru.

Print

'|

2
4

5

f: ,1.:

nesurerent

|@iuEments.

g

Column

True

Bit

Print

0

I

2

4

Dat€

DCBA

LLLH
LLLL

Rangr

OCBA

LHHL
LHLH
LHLL
LLHH
LLHL
LLLH

,t;:

Functioo

Figure

LOW

LOW

Bir

;

an rclB

LOW

DCAA

HHHH

HHHL

HHLH
HHLL
H

LH

Trü.

Tru.

Ptint

Print

o

o

8il

H

or

Tru€

2-5.

Print

0

1

3
4

Data

Output

FüfFtkh

O,

Remlo
AC, R.mt€
T6,R.@E
DC.

F.tio

Jl, R.tio

{nor Elidl

AC,

F.r'o

TH,

Ratio

oc

o

AC
T6

Polrity,

Onrlod

+

+,

OL

-.

oL

S..tipb/Hold

Mode

ON

OFF

Connections,

Fundid

D.b

DCEA

LLLL
LLLH
LLHL
LLHH

D.b

DCEA

HLHH
HHHH

Option

Column

HIGH

DCBA

LH

LH
LHHL
LHHH
HLLL
H

LLH

H

LH
HLHH
HHLL
HHLH
HHHL

HHHH

HIGH

Column

HIGH

021

8it

L

Cdumtr

Tru.

Print

o

2

Tru.

.

Tre

1

P.int

I

l0

Print

8
9

+

DCBA

LLHH
LLHL
LLLH
LLLL

Fundion

DCBA
H

H

LHHH
LHHL

LHLH
LHLL
LLHH
LLHL
LLLH
LLLL

LOIV

O.b

LOW

Dü

DCBA

HHHH
HLHH

LOü

LH

LLH

HLLL

Tru!

Print

Tre

L

n

8it

Print

Tr{

Pr&rt

6

7
8
9

+

4

Model34904

Section

II

LOGIC LEVELS

.

lnput Lines:

open

circuit

=

+

LOW

closure to

Output

Lines: HIGH

=

+

LOW

H

after signal name

after

L

signal

Outguard
and chassis
40 V above chassis.

INPUT

ground

(power

SIGNALS

Remote

Range Programming:

front
trols

tions.

Range

.1 V,.1
lV,
10v,
100v.

Enable:

panel

and

1KO

10ko

100ko

HIGH

0.3 V
ground

0-3 V

name

is isolated

linel

Range,

enables

ksl

=

I

through

=

1

0.3 V,

means HIGH

means LOW

ground

Continuous

remote

1000v,1000ko
10,000ko

Autoränge:

ables
selects

Function

Function

DCL
'rlL
ACH
Test

HIGH input

programming.

range

Test

No. 1.

Programming:

34904-B-296a

+

0.3 V,

t

V

3.9

+

39 V

Function,

lnput

1.5

2 mA rnax.; or

<

A.

300
j

i.S

15 mA max.

from

CBA
H H
H L
H
L H

V, 400

is true.

true.

is

inguard circuit

and

may be

LOW input level

and

programming

Logic

L

L H
L L

level

selects

In

Test Function.

Input

Logic

B

H

REMOTE INPUT

"

2-

pA

V,

100

rnax;

contact

pA

nnx.

common

floated

up to

of

these func-

Test

autorange

disables

2

3
4
5

6
7

and

Sample/Hold con-

Levels

L

H

L

H

L
H

autorange

Levels

A

L
H
L
H

CONNECTOR J7

oPTtoN 022

FE
lo

rE=ä;:
t:uE3X:I--

e

52 H * F E I =

qd

E

39H;;5EEiF==

or

No.

dis-

5 fr i F 3 ä

; ? 3

ä-j=!9il

äEHäEä

t:Litr

EF!!A

= Ir

*

-

INPUT

Sample/Hold

Sample/Hold

.*'

iL.

S/H AC Trigger

OUTPUT

Program

Data Flag

Stretched

i ä

6 s

qc

.<

=a

*

SIcNALS

Track/Hold
Acquire/Hold L

Program

initiates

tion,

Hold: Continuous

sampling and

External

ted,
one reading

minirpum
Stretched Pulse

input
tude
and

of outguard-to-inguard

LOW

HIGH at

LOW

Hf

Sample/Hold

Programming

Execute:

outguard-to-inguard

and

Sample/Hold

Encode

"0"

input

Trigger
of

pulse

from

2 V to 15

Stretched Pulse

SIGNALS

Flag:

indicates

(Print

beginning

completion

at

Pulse

to

GH

LOW for

(Cont'd)

LOW input

LOW input

permits

(Trigger:

level for

cycle.

(Option

ns

30

triggers

Output circuit.

(Option

least

at

Output circuit.

Changes

transfer

Commandl:

of

Output

a

Trigger

Mating

-hp-

Part

Amphenol

(Option

Mode

L

level

transfer

program

level

external

040):

30

from

of

or

triggering.

When

minimum

O4O):

Sample/Hold

Negativegoing

ns

wide and

V triggers

LOW to H|GH

information

is

complete.

Changes from

measurement,

a reading

(Option
minimum

S/H AC

Connector:

No.

1251

No.

57-3Ob00-37S

O40):

Delay

H

L

for

minimum

of

information.

,,Hold,,

cycle.

Trigger input.

Range,

disables

mode

of

24O

LOW input

having

Sample/Hold

at

transfer.

and returns

04Ol:

Changes

ot

24O

{O84

of

autornltic

is serec_

ps

initiates

levet

circuits

edge

an

ampli-

circuits

beginning

Return to

LOW to

for

tts

5 ms

Func_

for

and

of an

to

from

each

Figure

2-6. Remote

Input

Connestions,

Option

022.

2-5

Section

II

Model 3490A

connector

57-30360-375).

Remote

2-34. Rear

2-35. Options
connector
connector

J7 is

Control

Input.

parallel

in
is shown

This

option

020 and

3490A Rear Input
pin

Do not connect these

B.

The

mating

connector

-hp-

in Figure 2-1 . The

connector is internally connected

No.

Part

l25l{084

connector is supplied

provide

030

a rear

with the front panel

inner

points

together externally.

for this rear

panel

(Amphenol

with the

panel

terminals. This

guard

input is

Part No. 125l-1233, Component Manufacturing

Inc. Part

No. A-1369. A six-foot
03490-61612, is
This cable

is terminated

Rear Input

A

High\

B

LoryJ

c

Input Low

D

Input High

tr

Conn. to B

r

Guard

Mating Connector:
Mating

Cable:

supplied with Options

one end

at

Connector,

Signal

)

o

Sisnal

Ext.

Ref.

(lnt)

-hp-

-hp-

Part No.03490-61

or

Part

(External

No.

-hp

cable,

Part

020 and 030.

by the rear input

J10

Wire Color

Cable)

White
Green

Black
Fled
NC

Shield
1251-1233

612

Figure 2-7. Rear Input Connector and Cable.

input

of the

to

-hp-

Service,

No.

mating

2-36.

.then

2-38.

however,
Purpose

connector; the other

2-7

also shows the wire

General

2-37

. Figure

panel

GPIB connector, Il2,

of each

in

Section
3-90). The
Figure
The

connectors

and consist

panel

rear
which

be
connector
hood is
in Table

Purpose

2-9 shows the signal connections

signal. Additional

III,

Operating Instructions

1063IA/B/C

2-8 are

will receive

used to connect

of a

connector

paralleled

is not

molded

around the

2-2

mate with the

at either

plug

another

as

available as a separate

another cable. These
for securing

2-39. As many
parallel

the connectors.

Interface

to

the same

Gable

15 instruments can be connected

as

the following

Figure

4-20 shows the

Interface

bus system.

colors

lnterface

which mates with the instrument

or another cable, and a

shown

do

Length.

General

l. The cable length between

cannot exceed 12 feet.

2. When
parallel,

in
instrument

3.

The total
exceed 5 I

than two instruments

more

the

cannot

cable

feet.

end

is unterminated.

Figure

in this cable.

Bus

Connections.

at the

rear

gives a brief

and.

signal information

Interface Cables

instruments

the

end of the

(see

cable

description

included

is

Paragraph

shown

together.

identical

are

in

receptacle

plug.

cable

cable.

not

in Figure

rear

provide

Instruments

4-20. The

unit because

The connectors

panel

connector

thumb

the

screws

may
dual

the

listed

or

in

Purpose Interface

bus;

restrictions must be observed.

cabling

for a typical

General

two instruments

connected

are

length to

cable

exceed 6 feet

length to

each additional

per

unit.

units

all

cannot

Figure

2-8. Interface Bus Cables.

CABLE

10631A
106318
10631C

PART

NO.

LENGTH

3ft
6ft

'l2tt

Model

3490A

Table

2-2.

General

Purpose

Interface

Bus

Connectors.

Section

II

A.

B.

a

D.

Description

Cable to

with hood

Cable to

with hood

Rack

and

Rack and

D.

D.

or

or

-hp-

Part

1251-0293

'1251-0431

-0389

1

251

-0388

1

251

Jl2

*

6

No.

Amphenol

51-30240

57-60240

57-10240

57-20240

Mates

with

plug

chassis

and clamp

chassis Receptacle

and clamp

panel plug

panel

Receptacle

GPIB

ro(oF@

9999f

n^^A
JJJJJ

BUS

panel

Rear

with

B or

AorC

panel

Rear

with

B or

AorC

CONNECTOR

OUTGUARD

GROUND

8ä;;'iEFq8ä+

No.

Mating

-hp­Amphenol

Mating

10631A
10631

10631C

Connector:

Part

No. 1251

No.57-3O24O

Cables:

3

B 6 ft.

12

4293

ft.

ft.

LOGIC

preceding

H
indicates

Input

Each

6.2 kO to

Output

Each
open{ollector
O.4

SIGNALS

LMRE

L Multiple

GPIB
ler.

LSRO

L

attention

'Outguad

floated

LEVELS

signal

Signals:

input

Signals:

output

V output.

to

be addressed

Service

of the

ground

a maximum

signal

name

is

HIGH true;

line

ground,

can

Response

Request indicates

is

or as first letter

is terminated

and

one TTL

drive 1

S

driver

capable

Enable

or unaddressed

controller.

isolated

of 40 V

from

above

GPI

L indicates

with

3

load.

B loads.

of sinking

allows

that

the

inguard circuit

chassis.

of mnemonic

LOW true.

+

kO to

The output

all units

34904 wants the

4g mA

the control-

by

5 V

and

is

on the

common

an

at

(input

LEOP

L End

activity

HDAC

H

Data

Returns

data.

HRFD

HIGH,

LDAV

L

Data
from the
available if

HIGH.

LREN

L Remote

the

Remote

LDIO1 through

L

Data
form
3490A if

Low terminall

Output

on the

Accepted

to

LOW

Valid

34904

3490A

Address

Enable

mode.

LDIOS

Input/Output

to the

34904 if

addressed

and chassis

is

used

bus.

indicates

when

indicates

if

addressed
is

is

valid if

enables

to

talk_

(power

by controller

34904

34904

valid

output

to

addressed

MRE

is LOW.

the

34gOA to

lines

carry

addressed

linel ground

to

terminate

has

accepted

is finished

data

talk,

or input

to

listen

be

information

to listen

and

data.

processing

is

available

data is

and MRE

placed

in

octal

from

or

may

all

is

in

the

be

Figure

2-9.

General Purpose

lnterface

Bus

Connections.

a1

Section

II

Model 3490A

TRIGGER CONNECTOR Jl1

E

UtJJE

!2 lg

9V
=g

FCE
JF

-v

FL

L

Mating Connector:

*rp- Part No.

Amphenol

;22399ä

1251.0142

No.57-30141

Sample/Hold

LOW

Sample/Hold

reading.

Sample/Hold AC Trigger:

Negativegoing edge of an
wide and having

Sample/Hold circuits and/or

reading.

TTL Trigger:

input level

circuits and/or

((+

0.4

an

amplitude

V) for

least 30

at

triggers 34904

pulse

input

of at

triggers

nstriggers

at least 30

least 2 V

3490A

take

to

triggers

to take

a

ns

a

ooooo
zzzzz

zZ

l

tr

*

Outguard
ground

6ö

E6

(9c,

t*

ground

may

and

Figure

Trigger

2-40.

Figure 2-10 shows

241.
nector,
mating
(Amphenol

2-42.

243.

Jll,
connector

57-30l4l).

Sample/Hold

Option

Connections,

lists the

and

for

Connections, 0ption

045.

GPIB 0ption 030.

the rear

External

-hp-

Jll is

Figure

2-ll

Part

shows

trigger connections for Option 045,

EA

IlJIE

\:/JIU

oclo

no(,

F=F

)
!-

: HF

*o(JifC)(Jr

ui

z

l

ol
t-?

z

z'@O zzAi

oooo

2ZZZ

zz

--

ai ,4

**

is isolated from inguard

floated

be

a maximum of 40 V above chassis.

2-10. Trigger Connections,

panel Trigger con-

Trigger signals. The

No. 12514142

040/045.

the

external

is

which

F
()

A

Sample/

TRIGGER

Mating Connector:

part

+rp_
Amphenol

1251*,142

No.

No.57-30141

LETF:

L
ready for an external
trigger is received

circuit common

(input

GPIB

Hold without
connector

1 25 1 41

2-44. Sample/Hold

When

020.
with the
Hold trigger
Input
and

describes

CONNECTbR

Sample/Hold TTL Trigger:

Sample/Hold

Stretched

The mating

Jl1

LOW
Sample/Hold
Must

be

Negative-going
having
circuits
stable

at

Changes

minimum

Sample/Hold

(Amphenol

030.

External Trigger

Low Terminal) and

Option

Option

Flag

(34904

030.
020 or Option

for Trigger Connector

(Amphenol

42

57-301 4

with

Sample/Hold

BCD

Remote

Expand Option

connections

Connector,

J7. Figure 2-6

the trigger signals.

level

input

circuits and/or

HIGH

at

AC Trigger:

edge

an amplitude

Pulse

triggers

and/or

ps prior

least

2

Output:

from HIGH

ot

24O

AC Trigger

connector for

57-30141)

O.4

{(+

least

ps prior

60o

of

input

an

of

at

3490A

to negtive transition.

l2+z.q

each

for

tts

input.

Jl 1 is

supplied

goes

LOW when

trigger, and

is not looking

chassis

goes

(power

030.

Jll is

I

).

BCD Remote

included in an

is

Expand

020,

are

located

on the Remote

shows

The mating

for .)t least 30

V)

triggers 34904

to

pulse

least 2 V

to take a reading.

to

V)

Sample/Hold

*tp- Part No. 1251{142

with

to take a reading.

going

Low'

least 3()

at

triggers

({+

LoW

TTL Triggpr

Option 045

the

HIGH when

for a triggerl.

line)

{rp-

3490A

The

Part No.

is

mating

Option

instrument

the

Sample/

this connector

connector

ns triggers

ns wide and

Sample/Hold

Must

be

for

o.+ V)

or

a

or

Option

*

Outguard
ground

ground

and may be floated a maximum

is isolatedfrom

Figure

inguard

2-11. Trigger Connections S/H Option

circuit

of

40 V above

common

chassis.

(input

Terminalland

Low

045.

chassis

(power

linel

Model3490A

Section

II

-hp-

for

J7

is

Part No.

s7-30360-37s).

245.

Sample/Hold

the Trigger

shows
trigger

125

2.46.

signals.

(Amphenol

l-01 42

REPACKAGING

with GPIB Option 030. Figure

Connector,

The mating connector is

57

-301

4 l).

FOR SHIPMENT.

NOTE

If the instrument

service or
identifying
to be accomplished. Include the
serial number of the instrument.

identify the instrument
nulhber. If

-hp-

Sales and Service

247.

The following

the

instrument for
available,
appropriate

tape

or metal bands.

available,

proceed

is to

repair, attach a tag to

the owner

you

have any

place

the

packing

shipped to

be

indicating

and

by model

questions,

Office.

general

is a

shipment. If

instrument

material

If the

follows:

as

and seal

original

1252-0084

Jll,

Hewlett-Packard

the
model
In

any correspondence,

number

contact your

guide

the

original

in

the

(Amphenol

and describes the

-trp-

Part

the

instrument

service

or

number

for

container
well with strong
container

and full

and

full serial

nearest

repackaging

container

2-10

No.

for

repair

with

is not

a. Wrap

before

b. Place

instrument

plastic

or

c. Place

heavy

d. Mark

MENI"

If
Hewlett-Packard

o tag
owner
be accomplished.

is

and
any

by

you

est

the

instrument

placing

carton

in

an inner

packing

and protect

foam.

the

instrument

and seal

shipping

"FRAGILE."

the

instrument

to

the instrument

and indicating

seiul

number

any

Sales

number

questions,

and Service

full

cotrespondence,

model

have

-hp-

in

heavy paper

container.

material

with strong tape

container

etc.

for

Include

and

around

panel

face

with cardboard

and inner

'.DELICATE

NOTE

is to

be shipped

service

or repair,

identifying

the service

the

model number

of the instrument.

identify

full

contact

Office.

the

seriat

all sides

container

or

metal

attach

the

or

repair to

instrument

nimber.

your

near-

or

plastic

of

the

strips

in

bands.

INSTRU_

to

In

If

a

2-9

Section

III

Model3490A

1.2.Line

Switch,

Rate Control.

Sample
clockwise
known delay.

Manual Trigger

J.

control.

4.

Sample/Hold Switch
Hold mode.

Ratio

5.

6.

Switch

referen@.

Range

Switch

The

Range

is,

when
ously selected
on a range key,
result-

a

Signal or

terminals.

push

on/push off.

position.

Maximum sample rate is selected in

Each

Pushbutton in

(Option

(Option

keys.

one range key

0801. Selects

keys are

Switch

is

key

or

External Reference

counterclockwise

center

of Sample

o4o/045).

is

released.

mechanical

Selects Sample/

internal or

interlocking.

pressed,

not

Do

damage will

(Option

Figure

step adds a

external

That

the Previ-

pull

up

O80l input

.'^".

Rate

31.

.

._.8.

9. InPut

i\-

10. Function Switch.

1.

1
'|

2. Rear

1 3. Line

14.

1

5. Line

16, AC

17. Data Output

18.

19. Trigger

Front and

Guard terminal,

terminals.

Thermal Adjust. See

Panel input connector in
terminals. Included
2-7.

voltage selection switch.

Remote

2-6.

General

030).

Figures 2-l0

Input connector J7

fuse.

power

@nnector.

connector

Purpose

Figure 2-9.

See

connector J1 l

Input

and2'11.

Inter{ace

Rear Panel.

Paragraph

with

Options 020

(Option

J6

3-41.

parallel

gee

Figure

(Option

0201.

connector J12

Bus

(Option

with

or

030. See

.

2-1

0201. See

Figure

See

030 or 045).

front

Figure

Figure

2-5.

(Option

See

l-rJ

Model3490A

SECTION III

Section

III

INTR0DUCTI0N.

3-1.

section

This

3-2.

34904

Model

resistance

and

sample/hold

for

tions
control
may
the

3.3.
3-4.

3-5.
voltage,
S-digit resolution
except
ranges,

1000V; and
Ranging
and display
which

3-6. Output
3-7.

Option
coded decimal
either HIGH true or LOW true,
switch
assembly. With
function may be
information.
option.

3-8. General Purpose

030. The

option

the same

bus in parallel

controlled

control

mode

includes

tude

Controlling

3490A
calculators
Programmer.

3-9.

3-10.
\todel 3-190.{

and

found

be

front

3490A

INSTBUMENT
Standard

standard

The

ac

l000Vac

V

.l

may be

checks

Data

Output

022. Option 021

on

General Purpose

permits

bus lines. The 3490A

by

of range,

possible

is

measurement

and range,

GPIB option

Sample/Hold

The

Sample/Hold

contains

Multimeter

measurements.

output.

data

pull-out card at

a

on

Panel.

CAPABI

I nstrument.

Model

voltage

are

and Remote Gontrol 0ptions.

the

instruments

and

and resistance

and

to

dc.

1000V;

to

six resistance ranges,

manual

automatic.

certain operations within

Option

(BCD)

outguard data output

Option

programmed

External

remote

with several

a single

function,

with

in the

the

0ption

Multimeter

instructions

to make dc

It

and ratio

Basic operating

LITIES.

3490A Multimeter

to I 20 % of range on all

up

3490A

The

4 ac

or automatic. Polarity

A self-test feature is included

021

provides

output data.

O22, the

triggering

Interface

Interface

programmhg

controlling instrument.

trigger mode and sample/hold

Option 030.

status,

function,

format

-hp-

given

that may be used with the

include

Model 3260A

040

or

Option

(040

to sample a changing input

OPERATING

for using

voltage, ac voltage

includes

also

measurements, remote

instructions

the

bottom edge

measurements with

has five dc

voltage ranges,

I kO to 10,000kQ.

the instrument.

and Remote

columns of

ten

This

data

as selected by

printed circuit

349OA

by LOW

possible

is

Bus ll0

and data

may be

other

in Paragraph

-hp-

the

true

with

Bus I/O

connected

instruments and

The output data

polarity, magni-

9800A

Marked Card

045.

or

045)

the

instruc-

makes dc

ranges

voltage

I V to

selection

Control

binary

may be

slide

a

and

range

input

either

Option
(GPIB)

output on

to

Remote

3-126.

series

enables

the

INSTRUCTIONS

voltage

amplitude. This
digitization of
waves.

signal input Low terminal and from chassis
which allows the voltmeter
measurements. The

of

Sample/Hold options are as

When Sample/Hold

3-11. Batio

3-12.

capable of making three-wire dc-to-dc

measurement. Two External Reference ranges are pro-

vided, the I V

10.1

voltages from

3.13.

3-14. Figure 3-l

and connectors

Some of the features shown

certain options.

,.

3-15.

3-l 6.
between

a

chassis. These maximum
front
instrument

and hold

The

extemal

in a 3490A with:
BCDiRemote

GPIB

Option

Neither 020 or

0ption

The 3490A

t 1.2V,

V to

t

FRONT AND

MAXIMUM INPUT

Table 3-l

input terminals,

panel

and

may

If the

34904 has a rear

the

front

connected
be applied, always

nals. Be

before connecting

open

terminals

front

sample

that

permits pulse

changing

trigger circuits are

designations

is

installed

Expand

030

030

long enough to measure its

height measurements and

waveforms

follows:

Option 020

such

to

make

used for the

The

Sample/Hold

is designated as:

Option 040
Option
Option 045

080.

equipped with Ratio Option

range accepting reference

the 10V

and

I V to t 12V.

PANEL

REAR

shows the front and rear

gives

and

a brief

OESCRIPTION.

description

are available

VOLTAGES.

the

lists

must

resull.

maximum allowable voltages

and between the

voltages are

not be exceeded or

also

wAR]ililG

input connector,

and rear terminals are

puallel.

in

the rear input

ilre

If

protect

and vice

voltages may

high

the open

terminals

input to

an

versa.

as ramps or

isolated

guarded

040

or

ac-to-dc ratio

range accepting

panel

terminals

shown

damage

internally

termi-

sine

from the

ground,
floating

34904

option

080

voltages of

controls

of each.

onlv

with

and

on the

to the

are
the

is

3-l

Section

III

Model

3490A

Table

3-1 .

Between Input
Between fi
Between
Between Guard

3.I 7. GENERAL

3-18. Turn-On

3-19. Before
sure the rear
correspond to the
shown

in

HIGH and LOW

HIGH and

Signal

either

LOW
and

OPERATING

and

Warm-Up.

connecting

panel

voltage

Paragraph

Chassis

2-5 and Figure 2-1.

3-20. Guarding.

3-21. Common-Mode
are those
of the source
between the

ground
voltages
error in

drop in
the resistance
cant.
ground
may

existing between

circuitry

Low

measurement point

of the

source

flows into

measurement

the

measuring

of

long input

Wide separation

point

and

the

result in high

common-mode

the 3490A

Maximum

terminal

LOW

and

Voltages.

Guard

Maximum

Voltage

100O

Vrms
250 Vrms
2O0 V

500 V

INSTRUCTIONS.

power

ac

line selector

of

Voltages. Common-mode

the power

and that

circuit. When

results

circuit. In systems

between

ground

to

the 3490A,

switches

the

available power

of

current

line

the

and

are set to

ground

34904,

power

due

input terminals, some

because

of the voltage

measurements,

leads

may

become signifi-

the 3490A

point

of the source

power

voltage.

peak
peak

make

line

as

voltages

point

and
line

to

these

line

circuiü,

The

Guard

nected

point

the instrument

3-23.

Guarding Information.

on purpose

-hp-

Application

and

Guarding."

through

your

Terminal

to

Low

in the

and

methods
Note No. 123,

This

nearest

-hp-

must

or to

source

moy

circuit

result.

More detailed

guarding

of

"Floating

application note

Sales and

3-24. Floating Measurements.

3-25. The
measurements.
connected
between

geater

the

than

A. Best

Connection - Guard

r---

B.

Guard Connected To

Model

That

to

chassis

guard

500

3490A

terminal

peak.

V

is

capable

is,

the input

(power

line)

and chassis must

Connected

44904

--------

Low At Voltmeter.

always

be

con-

a corresponding

or damage

information

may

be found in

Measurements

is

available

Service Office.

of making flöating
Low terminal
ground.

The

voltage
not

To

Low

At

Source.

- -

CONNECITON

EEST

SAME VOLTAGE

NO COMMON MOOE

GOES

9!9!'!-9 _ _ _

IHROUGH

CURRENI

Rb

to

is not

be

3-22.
ways
errors caused
Guard is

Guard

Connection. Figure

of connecting

by common-mode

practically

at
measurement point,
through
circuit. In
connected
potential.
through
measurement
common-mode
problem
similar to
manner
between the
gound
circuit­Lou' terminal
rrdicated.
mode
r3ring and

Guard

example
to the
This

the input

or if

A.

allows

of the
Guard

If

the

voltages

damage

and not through

Low

allows

error.

voltages

R6 is

except

any

Low

source
should

or

guard

may

the

3-2 illustrates

the 3490A

Guard terminal

voltages.

the same

potential

so any common-mode

the

B,

the

3490A

terminal, placing

common-mode

lead

resistance

This

are

small

connection

(short

R6, causing some

not

expected

leads). Example

that connecting

common-mode

current generated

measurement point

circuit

to flow in the

alwoys be connected,

to

point

a

exceed

in the

terminal

the

Low-to-Guard

source

is

left open, common-

34904.

three

to

reduce

In example

as the

current

A,

Low

flows

measurement

Guard strap

both

at the

same

current to

flow

may be used if

to

be a

C is

Guard in this

power

and

line

measurement

either to the

circuit

breakdown

is

as

C. Guard

FLOATING

r'-

i*.J

Connected To

- -l

3-2.

Figure

VOLIACE

sÄME

Earth

COMMON MOOE
6OES TBROüGH
CAUSIN6

9E0!{q__

Ground.

DOITEO
DEFEAIS
OAMACE INSIqUMENT

SOLIO
MUCH
CURRENT AWAY FROM
PROVIDED
MOSILY

GROUNO

CURRENT

ERRORS

_

CONNECIION

GIAROI MAY

CONN€CION

OF

COMMON MOOE

THAT

8€TWEEN

Fb,

ECM

Connecting the Guard.

SHUNTS

Rh,

15-

GROUNOS

3490A

Model

Section

III

0verrange

3-26.

3-27. Measwements

to 120

up
ranges. Overrange
the maximum
includes the overrange

3-28. Overload

3-29. lf the
the

Overload

display will read

Bange

3-30.

The 349OA

3-31.

kilohms

decimal
selected. In
indicates

3-32.

3-33.
by the function
control

indicate

available

TST

(except

point

range.

Function Indication.

In the standard

is in use,

that the

special

annunciators

Measürements.

of runge

7o

inputs on

allowable

Indication.

measurement

"OL"

annunciator will

120000 to 120005.

Indication.

in

and

autorange

switch position.

the

front

display

to

rated

within

on all except the

these

input

"1"

display always

Ratio

range switch

mode, the

3490A,

"REM"

panel

assembly

indicate

voltage.

the sixth

as

is 120

%

measurements),

function is

annunciator

switches

adds V,

the

function

accuracy

ranges

of

light.

reads

indicating

decimal point

If

are

1000

would

The

digit.

nnge

The

in volts

indicated

optional

are

disabled. An
AC,

selected.

Vac

or

numerical

with the

the

lights

possible

or

exceed

display

geater,

range
alone

only

Remote

to

Kfl

and

dc

or

a.

Set

Function
Sample/Hold
SAMPLE/HOLD

b.

Set

SAMPLE

wise from

c.
should
in

the
with
shown.
count
The,last

to
logic

d.

t

2 counts.

HOLD.

Select

_follow
list.

All

the polarity

The

accumulates,

two

the

test.

circuits

Select

This

RANGE

last

digits in

If

are

RANGE

options,

to

the

sequence

readings

sign,

reading

these

operating

+

080.024

+

o4.oo24

+

0.20024

+

.0too24

+

0.09032

+

to.oo24

+

200.024

+

4000.24

+

80002.4

+

6000.xx

verifies

to TEST.

set

OFF.

RATE

l,

which

should

numbers,

listed

then

stops
the last
displays

correctly.

OL

2.

The

the

l0

If

instrument

RATIO

control

below,

number

to

INT

one position

is

Logic

Test.

starting

in

be

the

and

decimal

displays

at the

are correct,

all

number

are not

display should

V range

zero.

has

Ratio

REF

and

clock-

The

display

at

any point

order

ih-own,

points

digiis

as

the

shown.

significant

most

of the

be .000000

or

ai

Autoranging.

3-34.

3-35.

In

the autorange

of

range and
ment sequence
the proper
control
button

sample
When
a voltage

valid.

3-36.

3-37.
When
measurement
depressed.
instrument
sampling

3.38.

3-39.
proper
circuits,
procedure
not

correct,
of the
mance

range.

is set

depressed

until

the

3490A

range,

ManualTrigger.

Manual

the

Sample

If

is

will stop

SELF.TEST

The

Intemal

operation

and

the

to perform

refer

other

tests

Checks.

mode,

downranglng

is

not

completed

For

example,

to

Hold

and the

once,

the 3490A

one

reading

is

changed

the

first

triggering

results

the

not

is

Rate

control

each

time

pushbutton

in

the

until

the

OPERATION.

Test

function

of

most

ohmmeter

the

Intemal

to

the

Troubleshootingsection.

are

not

upranging

lOVo

at

unless the

is

taken

to the

reading

available

the Manual pushbutton

is

Hold

button

of the

reference.

correct,

occurs at l2O%

of

range. Ameasure-

reading

if

the

Sample

Manual Trigger

will continue

on

the correct

autorange

in

autorange

on

instruments.

all

is set to

depressed
condition,
is released.

of

the 3490A

dc

circuits,

Use

the

Tests.

If

Test

refei to

is
Rate

push-

range.

mode

from

is not

Hold,

while the
automatic

verifies

logic

following

No. I

Ifany

perfoi_

the

on

to

one

ii

e.

Select

RANGE

readings

accuracy

­+
3490A

l0 V

shoüld
dmplifier

position

'counts,

is

accuracy

-

10.0000V.

+
attenuation

Dsplay

proper
3-40. DC

341.
.l V

should

f.

Select

RANGE

of t

10.0000
dc standard

V. Display

error).

has the

and short

be r

00.0000.

zero.

and

remove

g.

Select RANGE

verifying

h.

Select

RANGE

of t

Display

dc standard

and

i.

Select

RANGE

should

operation

VOLTAGE

For

optimum

range,

first

be

error).

the dc

be

3.

(8

0.01

ratio

EXT

Return

the

0.01

-

09700.0 1

of the

Difference

counts.

4.

Using

a
% or better,
should

be + 09.9990

This

checks

option,

REF

This

set

input

checks the

RATIO

short

from

input.

5. Display

0.1 V range

6. Using

should

zero.

a dc standard

% or better,

should

be - 1000.00

This

ehecks

amplifier

7.

Short fl

xl00

7000 counts.

Ohms

Converter.

MEASUREMENTS.

short

accuracy

the

of measurements

input

terminals

between

dc standard

apply

an

+

(16

+

the

Reference.

RATIO to

EXT

terminals.

Ratio

switch

be

apply

the

dc input

to INT

000.000 t

an input

(35

I

gain.

SIGNAL

This

with a copper

+

having

input

Reference

having

terminals.

and

an

of

counts

Ifthe

REF

Display

REF

t5

an

of

counts

0.01

verifies

the

on

-

J-J

Section

III

3490A

Model

or a large

bar
(Thermal Adj)
through
connector,

the rear

loosen

AlR429.

Be wre

to observe

and

tations

3-1,

Table

rewlt.

may

DC Sample

3-42.

sample

The

3-43.

measurements

3-2. Sample

Table

Function

Volts

DC

Volts

AC
Ohms

k thru

.1

100

1,O00

10,000

*Sample

not in
Option

3-44.

240.2ms+5ms

1.26s+.025s

ko

240.2ms+5ms

kf,,

300.2ms+6ms

ko

660.3

Rate Control

overload.

050 instruments,

Input Resistance.

solid

zero

for

panel.

the

connect

to

copper

wire, and

display.

the

If

hinged

the Guard

the maximum

the

on

noted

damage

or

Rate

rate and

shown in

are

Minimum Sample

050

Option

ms + 12 ms

set to

Each counterclockwise

front

Response

and

response
Table

and Response

Rate

FAST

ms in

200

adjust

AlR429

to

the rear

gain

3490A has

cover

Terminal

voltage

panel

ta the

instrument

Time.

for dc

time

3-2.

Period*

O60

Option

ms+4ms

200.1

1.05s+.025s

ms+4ms

200.1
ms+5ms

250.1

ms + l0

550.2

position

Option

and instrument
adds

step

060

AlR429

is

accessible

input

access

limi-

in

and

voltage

Time.

Response

Time

200.1

1.05 s

2OO.1
25O.1

ms

550.2

ms

240

instruments.

in

to

ms

ms
ms
ms

Frequency

3-50.

Frequency

3-51.

250kHz,
That
is 2OHz

100

3-52.

3-53.

all

r"itft u

is, the frequency

to 250

is 100 kHz,

V

Input lmpedance.

Input impedance

ranges,

and
instruments
instruments

Harmonic

3-54.

The

3-55.

circuit

verter

sinusoidal
input
ments

input.

signal

as shown

Harmonic

Any

even

Bange.

range

maximum
kHz, but

and at

is 2 MO

without

having

D istortion.

3490A

calibrated

Therefore,

will affect

in Table

Table 3-3.

%

is

converter

the ac

of

range

volt-Hertz

for

the

product

I V and

the maximum

l0 kHz.

it is

V

1000

function

ac

in the

panllel with

in

t I

%

panel input

rear

tire rear

panel

input

connector'

has an average-responding

to display

any

the rms

distortion

the accuracy

20Hz

l0

V ranges

frequency

is the

(

(90pF

and

ac-dc

value

present in the

of the

3-3.

Distortion

Distortion

o.1

0.5

1.0

2.O

Error.

Yo Error

{*Fundamental)

Max.

Positive

0.000

0.001

0.005

0.020

Max.

Negativr

to

of 107.

at

same on

pF

65

in
in

con­of a

measure-

Input resistance

345.
o

ohms on

101

t

megohms

3.46.

0.1 5

AC VOLTAGE

Be sure

to observe

and

tations

noted

Table 3-1,

result, and

may

will

ments
The display

341 .

the input shorted.

with

the input
accuracy

shorted should be

of ac measurements

not specified.

AC

3-48.

-3-49.

Sample

The sample rate and

measurements

function

the dc

in

I V, and

V,

the .1

7o

the 100

on

V and

MEASUREMENTS.

connect

to

or

be

will NOT

Rate and

are shown

the

the maximum

the

on

damage

high

front

to

frequency

in enor-

rcad

The indication

less

below

Response

response

nTable

is

10V ranges,

1000 V

Guard

Terminal

voltage

panel and

instrument

the

measure-

on any

zero

on all

50 counts.

than

of full

1.0%

Time.

time for

3-2.

greater than

l0

and

ranges.

limL

in

ac range

with

ranges

The

range is

voltage

ac

Third

Fifth

*Depends

fundamental.

RESISTANCE

3.56.

When the

3-57.
ments,
display

movement

readings

mtusur.*ents

Function
copper
efn+zq
accessible
rear
access

to

bar

(Thermal

through

connector,

input

the adiustment.

to

on

on
.1V
or

phase

0.1

o.5

1.0

2.o

0.1
o.5

1.0

2.O

relationship

o.033

68

0.1

0.338

0.687

0.020

0.1 01

0.205
o.420

between

MEASUREMENTS.

3490A

of the

jump.

to

the .1

dc, short

solid

large

Adj)

rear

the

loosen

is making

instruction

For

kO

the

for

panel.

resistance

optimum

first

range'

input

copper

display'

zero

If the

the hinged

0.003
o.167

0.328

0.667

0.020
o.099

0.195

1.380

harmonic and

measure-

will

card

accuracy

Range

set

terminals

wire, and

A1R429

3490A

cover

cause

with

adjust

has

gain

to

of

and

a

is

the

Model3490A

to connect

sure

Be
and to obserye

tations
Table 3-1

may

3-58.

3-59.
making resistance
be connected,
between
O

Signal

noted

,

result.

Input Connections

Figure

3-3

since there

O

Signal

lead resistance

O SIGNAL

the

the

maximum

on the

or damage

shows

front

to

the proper

measurements.

is

Low and Input

permissible

Guord

voltage

panel

the

Terminal

limi-

and

in

instrument

connections

All four terminals

no internal

Low.

connection

Maximum total

is 10 O.

for

must

Rate

control
signal
connector.

timing

to

Low

occur

must

be set

applied to

The

the Hold

External

requirements

transition

of

simultaneously.

HOLD

are shown
External

Pilä:::",----__1_

,

o

Encode

goes

Flag

External

goes

Flag
sequenoe.

must be

LOW.

HIGH

Tl

-

EXTERNAL

ENCODE

34904.81&

External
Data

changing

Data
ment

to Hold,
connection
Encode

Encode

HtLiH at

This

requirement

Encode

to

indicating

or

a continuous

either

at

signal

in Figure

and Data

teast

HIGH

immediately

the

start of a

Section

rear panel

logic levels

34.

The

High

Flae

r

ps

16

rnay

before

be met

after

measure-

III

Low

and

can

by

Figure

3-3.

Ohmmeter lnput

3-60. 0hms Signal

3-61.

The

maximum
measured
overload.
current
sources

is the

as a

voltage

3-62.

3_-63.
shown

3-64.

365.
capability
either
order

is 13

V for

Table

3-4

for each

are not

ratio

result

which

0hmmeter

Ohmmeter

in

Table

range.

required,

of

the voltage

the

of

determines

Table

34.

Range

10

100

1,000

10,000

Sampte

sample

3-2.

EXTERNAL

The

BCD/Remote

of

remotely

the

Data

Output

to

remotely

Voltage

and

voltage

valid

lists the

across the

measurements

approdmate
Accurate
since

a resistance

across

reference

current, to

the

amount

Ohmmeter

ko

.l

lko

ko
ko
ko
ka

Rate

and

rates

TRtcGER

(Option

Expand

rriggering

or

Remote

trigger

the

Connections.

Current.

resistance

and 25 V in

short

voltage

measurement

the unknown

the

of the currenr.

Current.

Nominal

Current

1mA
lmA
lmA

pA

10

pA

10

1

ttA

Besponse Time.

and

response

020).

Option

instrument,

020 adds

the

3490A through

Input

connector.

circuit

and

current

resistance

reference

times

the

Sample

being

are

the

In

T2-External

before
External
Flag
holding
LOW

sequence.

T3 - External

to

T4 - Data

valid

Figure

3-4.

3-66.

DATA

3-67.

The
measurement
and

overload
output
and

.

connector

1251-0086

.

"

with

50-pin

nection

3-68.

3-69. If
Option
tion
ment
and
level

=0.3V

print

2-5

using

is

triggering.

Option

connector,

to

Output

the

02l

provided,

are

magnitude

overload

=

+

3.9
+

the

numerical

shows

a standard
HIGH/LOW
Assembly,
true

level

3-5

shows

Encode

goes

it

Enmde

went

HIGH, the

External

indicating

Encode

be accepted

Flag

HIGH

and

go

will

to

LOW transition

External

0UTPUT

Data

Output

data,

including

information.

also provided,

Figure

and

signals.

(Amphenol

021

-hp-

Signals

Model

,Ien

information

V r

0.3V,

the print

switch

Al0,

required

the printout

A mating

. A cable

-hp-

digital

recorders.

and Levels.

3490{is

columns

In

addition

information,

1.5

V,

l5mA

magnitude

code

-hp­on

must

be

by the

for

müSt

be HIGH for

Low

to initiate

was

set HtGH

T2 requirement

Encode

completion

must

rernain

initiate

HIGH

Trigger

(Option

immediately

HIGH until

LOW

a rEasurement.

within

of External

Sequence

021).

option provides

polarity,

A Data

as

2-5

Flag (prini

are inputs

shows

connector,

No.

57-30500-375)

terminated

562A-16C,

is

equipped

of l-24-8

coded

to

6 columns

range,

provided.

are

pA

400

max.

max.

Columns

of a measurement.

for columns

print

wheel,

the

Outguard

set

to correspond

digital

recorder

Option

021.

at

least

a measurement.

rnay

Data

of

a measurement

for

at least

ps

230

of receipt

(Option

ten

range,

4gps

after Data

met

be

Flag

24O

Enc,ode.

020).

columns

function,

goes

of a

Commandj

for printer

the

Data

-hp

hold

Output

part

No.

is supptied

at each .nä'by

available

with

Data

BCD

of

for

con-

Output

informa-

measure-

function, polarity,

The logic
The

LOW

I

through

HIGH

level

Figure

7 through

+

or - 124g.

Data

to

used.

10,

The

Output

the logic

Figure

lf

by

ps

of

u

6

3-5

Section

III

Model34904

Column

-_-_ll-

3-70.

The
changes
measurement, and returns
a reading

autorange

reading

HIGH to LOW
signal to a digital recorder.

3-71.

3-12. Three input connections
Output

+
level

ground
Hold connection causes the 3490A to stop
sampling
LOW
sampling
LOW, a LOW input
for
Paragraph

from LOW to HIGH at

cycle. If the

mode, Data

has been completed on

Input

connector. The input logic HIGH

1.5V, l00pA max, or
=

+

0.3 V

through <

until

connection

and

a mimimum of 240

3-64).

10

947654321
0v3012300

l+

Numerical

I

Readino

I

L

*"nn"

F unction
Polarity/Overload
Sample/Hold

Printout.

3-5. Option

Figure

Flag

Data

Signals

t

the

permits

@rint

Flag

transition constitutes a Print Command

and

0.3 V.
A.

300

line returns to

the Hold input

at

external triggering. When

level

ps

021

Command) output signal

the

beginning

to LOW at

instrument is

remains

the completion of

operating

HIGH until after one

the correct range. The

Levels.

available

are
open circuit. The

an

2 mA max.

A HIGH

the External Encode input

at

initiates

contact closure to

or

input at the Printer

A continuous

LOW.

prevents

one reading

Mode

of a

in the

the Data

at

=

+

3.9 V
LOW

automatic

automatic

Hold

cycle

is

(see.

Input

3-77.

3-78. The Remote

of the remote

tion
programming of
optional Sample/Hold.

=

+

level
circuit. The LOW

contact
shows the binary
programming,
input

3-79.

-3-80.
HIGH at

of
the
measurement.

to
to LOW at

instrument

Flag remains
completed on
output
400

3-81.
3-82.

LOW by an external connection.
line
HIGH, range and
the
is shown in Figure 3-6.

3.9 V

closure to

signals.

0utput Signals.

Program

The

the beginning

program information, and

transfer is

HIGH

at

signals

max; LOW

l,rA

Remote Programming

program

All

must be held

panel

front

3-83.'Remote Gontrol 0f

Requirements.

Signal

Control

range and

r

1.5

level

ground

coding required

as well as

Flag output

complete

Data Flag output

The

the beginning

the completion

is operating in

at HIGH until

the correct

as follows: HIGH

are

=

input
LOW continuously.

function

controls. The remote

option

mode

function,
input

For

100

V,

=

+

0.3
through

the requirements

of outguard-to-inguard

the

and

of a measurement,

+

V r 0.3

0.3

lines

program

Test Function.

operation,

of

pA

t

V

returns

instrument

of a

the autorange mode,

one reading has

range. The

Procedure.

are

permits

signals,

0.3 V,

for range

changes from LOW

reading cycle.

V,

remote

including

the

max.,

The Remote

or an

2 mA max.,

<300 O.

for the other

to LOW to

is ready for

changes from LOW

logic levels for

=

+

3.9 V

l5

mA max.

HIGH unless forced

If

capability reverts to

program

selec-

and remote

Test and

logic

HIGH

open

Figure 26

and function

transfer

indicate

and returns

If the

Data
been

t

1.5 V,

Enable

it returns to

sequence

or

to

a

Data

3-73.

3-74. Nl output
connector are isolated from
circuits
will
characteristics
connected.
common
be floated up to 40

3-75.

3-76. In
iunction. the Remote

external

for
during
rrulput
:natinE
\-' r:-3036G375)

.t

ol:on.

la

0utput

and from the input

maintain

and from chassis

REMOTE

addition to

remote

is

HIGH

connector.

lsolation.

input lines at the Data Output

and

normal-

all

with

Outguard

C0NTROL

triggering.

program

during

and

the

Data Output

ground

(power

V above

chassis.

(0ption

remote control

Control option

A Program Flag output is HIGH

execution, and

a measurement

*rp- Part No. 125 l-0084

is suppliedwith

terminals. The instrument

the internal

common-mode rejection

isolated

is

line)

(inguard)

lines properly

inguard

from

ground

and may

022).

of range

includes provision

the Data Flag

se,quence.

(Amphenol

the Remote Control

and

3{4. The Test function may be

programming Function

Logic Test, is selected
line HIGH. Tests
programming

Figure

l0 readings must be
before changing
of two
test. For
Paragaph 3-38
input

required

required for Test No. 7 may be applied

test sequence without affecting the other

No.

4, the ratio

remotely.

Remote Control

A

3-85.

336. All input
connector

circuits

Range lines A, B and C as

When Test No. I is selected, a minimum

2-6.

the program. In

readings

and

is required to record the turnover

other

all

describes

for Test No.

and output lines at

isolated from the

are

from

A and B HIGH.

by

No. 2 through 7 are selected

taken to

tests,

only one reading

the internal tests. The

reference

lsolation.

the input termina-ls. The

selected remotely by

programming the

record all

and

6,

check

Test No.

cannot

the test data

3,

the Q

throughout

tests. In Test

be

the Remote
internal

Test No.

Autorange

indicated

a minimum

error

is

necessary.

-

10 V

short

signal

controlled

Input

(inguard)

instrument

1,

by

in

of

the