HP 3457A Bedienungsanleitung

Andere Handbücher für 3457A

3

Inhaltsverzeichnis

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Steren MUL-300 Bedienungsanleitung

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Somogyi Elektronic home SMA 92 Bedienungsanleitung

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Gossen MetraWatt METRAmax 6 Bedienungsanleitung

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PeakTech 4000 Gebrauchs- und Pflegehandbuch

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Gossen MetraWatt METRALINE DMM16 Bedienungsanleitung

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Fluke 8846A Bedienungs- und Wartungshandbuch

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Tempo Communications MM200 Bedienungsanleitung

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Elenco Electronics CM-1555 Bedienungsanleitung

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BGS technic

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HP

3457A

Multimeter

HP

3457A

Service

Manual

|

@

HEWLETT

PACKARD

Copyright

©

Hewlett-Packard

Company,

1988

Manual

Part

Number:

03457-90012

Edition

3

Microfiche

Part

Number:

03457-99012

E0288

Printing

History

The

Printing

History

shown

below

lists

the

printing

dates

of

all

Editions

and

Updates

created

for

this

manual,

The

Edition

number

changes

as

the

manual

undergoes

subsequent

revisions,

Editions

are

num-

bered

sequentially

starting

with

Edition

1.

Updates,

which

are

issued

between

Editions,

contain

in-

dividual

replacement

pages

which

the

customer

uses

to

update

the

current

Edition

of

the

manual

Updates

are

numbered

sequentially

starting

with

Update

|.

When

a

new

Edition

is

created,

all

Updates

associated

with

the

previous

Edition

are

merged

into

the

manual.

Each

new

Edition

or

Update

also

in

cludes

a

revised

copy

of

this

printing

history

page.

Many

product

updates

and

revisions

do

not

require

manual

changes

and,

conversely,

manual

corrections

may

be

done

without

accompanying

product

changes.

Therefore,

do

not

expect

a

one-to-one

cor-

respondence

between

product

updates

and

manual

updates.

Edition

|

(Part

Number

03457-90010)

+--+

+>

EER

VME

SF

earl

Ria

APRIL,

1985

Update

|

(Part

Number

03457-90201)

++

eet

+

+

OCTOBER,

1985

Edition

2

(Part

Number

03457-90011)

>

+--+

+--+

ips

i

aol

-aibte’

erm

4

MAY,

1986

Update

|

(Part

Number

03457-90090)

-

-

-

ee

tees

JUNE,

1987

ition

3

(Part

Number

03457-90012)-

++

> -

*

tress

PEBRUARY,

1988

RESTRICTED

RIGHTS

LEGEND

Use.

duplication.

or

disclosure

by

the

Government

is

subject

to

restrictions

as

set

forth

in

subdivision

(bX

3

Mii)

of

the

Rights

in

Technical

Data

and

Computer

Software

clause

at

532.227-7013.

Hey

lett-Packard

Company

3000

Hanover

Street,

Palo

Alto,

California

94304

|

YD

HEWLETT

PACKARD

SAFETY

SUMMARY

The

following

general

safety

precautions

must

be

observed

during

all

phases

of

operation,

service,

and

repair

of

this

instrument.

Failure

to

comply

with

these

precautions

or

with

specific

warnings

elsewhere

in

this

manual

violates

safety

standards

of

design,

manufacture,

and

intended

use

of

the

instrument.

Hewlett-Packard

Company

assumes

no

liability

for

the

customer's

failure

to

comply

with

these

requirements.

GROUND

THE

INSTRUMENT

To

minimize

shock

hazard,

the

instrument

chassis

and

cabinet

must

be

connected

to

an

electrical

ground.

DO

NOT

OPERATE

IN

AN

EXPLOSIVE

ATMOSPHERE

Do

not

operate

the

instrument

in

the

presence

of

flammable

gases

or

fumes.

Operation

of

any

electrical

instrument

in

such

an

environment

constitutes

a

definite

safety

hazard.

KEEP

AWAY

FROM

LIVE

CIRCUITS

Operating

personnel

must

not

remove

instrument

covers.

Component

replacement

and

internal

adjustments

must

be

made

by

qualified

maintenance

personnel.

Under

certain

conditions,

dangerous

voltages

may

ex-

ist

even

with

the

instrument

switched

off.

To

avoid

injuries,

always

disconnect

input

voltages

and

discharge

circuits

before

touching

them.

DO

NOT

SERVICE

OR

ADJUST

ALONE

Do

not

attempt

internal

service

or

adjustment

unless

another

person,

capable

of

rendering

first

aid

and

resuscitation,

is

present.

DO

NOT

SUBSTITUTE

PARTS

OR

MODIFY

INSTRUMENT

Because

of

the

danger

of

introducing

additional

hazards,

do

not

install

substitute

parts

or

perform

any

unauthorized

modification

to

the

instrument.

Return

the

instrument

to

a

Hewlett-Packard

Sales

and

Ser-

vice

Office

for

service

and

repair

to

ensure

that

safety

features

are

maintained.

DO

NOT

OPERATE

A

DAMAGED

INSTRUMENT

Whenever

it

is

possible

that

the

safety

protection

features

built

into

this

instrument

have been

impaired,

either

through

physical

damage,

excessive

moisture,

or

any

other

reason,

REMOVE

POWER

and

do

not

use

the

instrument

until

safe

operation

can

be

verified

by

service-trained

personnel.

If

necessary,

return

the

instrument

to

a

Hewlett-Packard

Sales

and

Service

Office

for

service

and

repair

to

ensure

that

safety

features

are

maintained.

|

@

HEWLETT

PACKARD

Operating

and

Safety

Symbols

Symbols

Used

On

Products

And

In

Manuals

AC

line

voltage

input

receptacle.

Instruction

manual

symbol

affixed

to

product.

Cautions

the

user

to

refer

to

respective

instruction

manual

procedures

to

avoid

possible

damage

to

the

product.

Indicates

dangerous

voltage

—

terminals

connected

to

interior

voltage

exceeding

1000

volts.

Protective

conductor

terminal.

Indicates

the

field

wiring

terminal

that

must

be

connected

to

earth

ground

before

operating

equipment

—

protects

against

electrical

shock

in

case

of

fault.

Clean

ground

(low-noise).

Indicates

terminal

that

must

be

connected

to

earth

ground

before

operating

equipment

—

for

single

common

connections

and

protection

against

electrical

shock

in

case

of

fault.

Frame

or

chassis

ground.

Indicates

equipment

chassis

ground

rH

oon

LE

;

; ;

:

terminal

—

normally

connects

to

equipment

frame

and

all

metal

parts.

Affixed

to

product

containing

static

sensitive

devices

—

use

anti-static

Aas

handling

procedures

to

prevent

electrostatic

discharge

damage

to

ATTENTION

ne

components.

NOTE

Calls

attention

to

a

procedure,

practice,

or

condition

that

requires

special

attention

by

the

reader.

CAUTION

CAUTION

Calls

attention

to

a

procedure,

practice,

or

condition

that

could

possibly

cause

damage

to

equipment

or

permanent

loss

of

data.

WARNING

WARNING

Calls

attention

to

a

procedure,

practice,

or

condition

that

could

possibly

cause

bodily

injury

or

death.

vi

Section

|

Section

Il

Section

Ill

TABLE

OF

CONTENTS

GENERAL

INFORMATION

Berea

|

I-1.

Introduction.

.....

1-3.

Manual

Description

1-5.

Instrument

Description...

..........

1-7.

Safety

Considerations

1-9,

Instruments

Covered

by

this

Ms

anual

.

113:

Specifications

ovo

s

p.oels

4%

FF

1-15.

Options

and

Accessories

..

.

be

28

117,

Tesh

Eetpments

5.6

6%

wed

4

4:5

Sas

es

INSTALLATION

2-1.

Introduction.

nas

2-3.

Initial

Inspection.

. .

.

2-5.

Preparation

for

Use.

2-8.

Line

Voltage

Selection

2-10.

Power

Cords.

xz

2-12,

Grounding

Requirement.

gy

fake

2-14)

BenghvOse

i

5.3.0

Hea

a

ace

2-16.

Rack

Mounting...

.........-45

2-18.

Interface

Connections.

on

We

2-19.

Control

Interface...

.........--

2-21.

HP-IB

Address

Selection...

........

2-23.

Changing

the

Address

from

the

Front

Panel...

.

.

Sri

bate

es

Hae

2-24,

Changing

the

Address

from

the

CONCOMET

i

eset

is

a

inderas.

wed

baey

How

HZ

2-25.

Installation

of

Options

...........

.2

2-28.

Rear

Terminal

Assembly

Removal.

. .

2-7

2-30.

Plug-In

Assembly

Installation...

.

. .

2-8

2-32.

Plug-In

Assembly

Configuration

..

.

.

2-9

2-38.

Wiring

Block

Preparation

.......

.

2-11

OPERATION

...

esse

ese

reerencces

3-1.

Introduction...

......

3-3.

General

Information

.

3-4,

AC

Power.

. .

3-6.

Power

On.

. .

é%

aapk

‘%

29:

ONCPAUON,

505.34

id

3

Synr8'

eee

ag

Eade

3-11.

Voltage

Measurements

.........-

3-18.

Resistance

Measurements.

.

. .

3-25.

Current

Measurements

379

14

3-32.

Frequency/Period

Measurements.

.

.

.

3-6

3-39,

HP

44491A

General

Purpose

IMAI

DIOR

CS

cece

ris)

syste

et

ei

ieid

oa

3-6

3-45.

HP

44492A

Reed

Relay

Multiplexers

cncc

2

6

nines

a

cate

at

are

e

Page

Section

IV

PERFORMANCE

TESTS

..

4-1.

Introduction

4-3.

Equipment

Required

4S

Test

Resoid«.

dinccd

9

Gtk

ee

»

Hy

4-7.

Calibration

Cycle

.

4-9.

Test

Considerations

ALOMGSETAL

sii

oo

Praia

s

wy

ered

Be

4-12.

Performance

Tests...

.

rarer

a

DC

Voltage

Performance

Tests........

4-

4-13.

Preliminary

Steps.

...

.

ag

4

4-14.

DC

Voltage

Function

-

Offset

Test

|

4-16.

DC

voltage

Function

-

Gain

Test...

.

4-

4-18,

DC

Voltage

Function

-

Lineari

RUGS:

hoot

sisogduri

do

enGhi

aad

wade

AC

Voltage

Performance

Tests:

4-20.

AC

Voltage

Function

-

Gain

Test

.

4-22.

AC

Voltage

Function

-

Frequency

RESPONSE

WERE.

&

shins)

CD

0

a

DC

Current

Performance

Tests.

4-24.

DC

Current

Function

-

Offset

Test

.

.

4-8

4-26.

DC

Current

Function

-

Gain

Test...

4-8

AC

Current

Performance

Tests........

4-9

4-28.

AC

Current

Function

-

Gain

Test...

4-9

2-Wire

Ohms

Performance

Tests

.....

4-10

4-30,

2-Wire

Ohms

Function

-

Offset

Te

4-32.

2-Wire

Ohms

Function

-

Gain

Test

.

4-11

4-Wire

Ohms

Performance

Tests

.....

4-11

4-34.

4-Wire

Ohms

Function

-

Offset

bh

oh

eee

Coed

ere

4-12

4-36.

4-Wire

Ohms

Function

-

Gain

Test

.

4-13

Frequency

Counter

Performance

Tests

.

4-13

4-38.

Frequency

Counter

-

Accuracy

LOST,

.

3

Gnsste

dive

abked

&,

Bulag

nie

al

ak

4-14

Rear

Input

Performance

Tests

(Standard

Instrument)...6

2

6

ecceccawcanne

4-40.

Preliminary

Steps.

.

4-4].

DC

Voltage

Function

-

Rear

Terminal

OFfRCG

Teh

6

2.3

att

AR

ets

Oe

4-14

4-43,

DC

Current

Function

-

Rear

Terminal

Offset,

Test.

20

ec0

ce

ss

a

craters

HA

Hes

4-15

4-45,

2-Wire

Ohms

Function

-

Offset

BORG

ras

stieis

a

a4

aarainl

ed

eet

He

$e

4-15

4-47,

4-Wire

Ohms

Function

-

or

fset

TEs

5.4

Wi

as

KAKA

ARR

dD

4-16

Rear

Input

Performance

Tests

(44491A

General

Purpose

Relay

Assy)

....-

4-17

4-49.

Preliminary

Steps.............

-

TABLE

OF

CONTENTS

(Cont'd)

Section

IV

Page

PERFORMANCE

TESTS

(Cont'd)

4-50.

DC

Voltage

Function

-

44491A

Offset

Test

.

~

417

4-52.

2-Wire

Ohms

Function

-

444914

OP

ESOG

ESE

osc

eo

bebe

Gasney

woard

4-18

4-54,

4-Wire

Ohms

Function

-

44491

A

OPGSBt

TSE,

odstus

5

4.

o

cans

ea

3

tw

mem

4-18

4-56.

DC

Current

Function

-

44491.

OFESEE

THOSE.

stonise

ora

dade

avs!

8

akane

a

ad

4-19

Rear

Input

Performance

Tests

(44492A

10

Channel

Multiplexer

Assy).......

4-20

4-58.

Preliminary

Steps...............

4-20

4-59.

DC

Voltage

Function

-

444924

OFtRel

TOSh

3:25.36

been

SS

eee

os

>

4-20

4-61.

2-Wire

Ohms

Function

-

44492A

ORR

est

iia sie

ns

aariiius

Daaasie

4

9m

4-21

4-63.

Operational

Verification

Tests

.....

.

4-22

viii

DC

Voltage

Operational

Verification

TE

BLS

Ss,

ocd

iso

apegiraa

0,

Gcakepes

On

epee

ee

ee

4-65.

Preliminary

Steps.

4-66,

DC

Voltage

Function

-

Of

4-68.

DC

Voltage

Function

-

Gain

Test...

.4-23

AC

Voltage

Operational

Verification

TOSS.

cece

cress

enna

veneene

4-24

4-70.

AC

Voltage

Function

-

‘Gain

Test...

.4-24

4-72.

AC

Voltage

Function

-

Frequency

Response

Fest

oi:

'a:

o

sigsiss

6

6d,

Sraine

ig

%

avn

4-24

DC

Current

Operational

Verification

PRESS

a

5,

as

G

iheh

5.

SO

eat

&

Riki

4:20

Go

4-25

4-74,

DC

Current

Function

-

Of

.

4-26

4-76.

DC

Current

Function

-

4-26

AC

Current

Operational

Verificati

o

.

-

4-27

4-78.

AC

Current

Function

-

Gain

wee

4-27

2-Wire

Ohms

Operational

Verification

Tests

4-27

4-80.

2-Wire

Ohms

Function:

TEs

a

Aas

ed

aya

A

4

Sigurt

4:

Ks

4-27

4-82.

2-Wire

Ohms

Function

-

Gain

Test

.

.

.4-28

4-Wire

Ohms

Operational

Verification

TOSS.

eciee

cv

ew

ses

ecene

scene

4-29

4-84.

4-Wire

Ohms

Function

-

Offset

OBES

gf

macnn

unioh

mately

Vial

mass

Jus

athe

4-29

4-86.

4-Wire

Ohms

Function

-

Gain

Test

.

.

.4-30

Frequency

Counter

Operational

Verification

TestS.

2.0.

66

cs

aes ees

4-31

4-88.

Frequency

Counter

-

Accuracy

OSES

es

Rut

love

trace

&

ego

tuate.¥

dob

ies

4-31

Rear

Input

Operational

Verification

Test

(Standard

Instrument).........

4-32

Section

IV

PERFORMANCE

TESTS

(Cont'd)

4-90.

Preliminary

Steps.............

+

4-32

4-91,

DC

Voltage

Function

-

Rear

Terminal

Offset

Test...

...

4-93.

DC

Current

Function

-

Rear

Terminal

Offset

Test...

0...

see

os

4-95,

2-Wire

Ohms

Function

-

Rear

Terminal

Offset

Test

4-97.

4-Wire

Ohms

Function

-

Rear

Terminal

Offset

Tests

ccc60

6

gadis

«

Rear

Input

Operational

Verification

Tests

(44491A

General

Purpose

Relay

Assy)

4-99,

Preliminar:

4-100.

DC

Voltage

Fu

Offset

Test

4-102.

2-Wire

Ohms

Function

-

44491A

Offset

Test

<9

4-104.

4-Wire

Ohms

Function

-

44491A

Offset

Test

4-106.

DC

Current

Function

-

444914

Offset

Test

Rear

Input

Operational

Verification

Test

(44492A

10

Channel

Multiplexer

Assy)...

........005

4-108.

Preliminary

Steps

4-109.

DC

Voltage

Function

-

44492A

Offset

Test

4-111.

2-Wire

Ohms

Function

-

44492A

Offset

Test:

Limits:

054.45

49

sae

sa

ction

-

44491A

Section

V

CALIBRATION

5-1.

Introduction.

.

5-4.

Calibration

Secu

5-6.

Security

Code.

5-8.

Changing

the

Security

Code.

5-10.

Calibration

Number

5-13.

Preliminary

Calibration

ProcedurGsia.

so

s.Qy

ss

eames

ee

eSB

5-15.

Input

Amplifier

Offset

Adjustments

..........02.02+.

34

5-17.

AC

Convertor

Frequency

Response

Adjustment

5-19.

Calibration

Procedures

-

Front

PaneliIiputs:

«

3...0sies

v2

6

dates

wD

5-21.

DC

Volts

Offset

Calibration.

.

5-5

5-23.

DC

Volts

Gain

Calibration.

..

2.2...

5-6

5-25.

DC

Volts

Linearity

Calibration...

. .

5-6

TABLE

OF

CONTENTS

(Cont'd)

Section

V

Page

Section

VI

Page

CALIBRATION

(Cont'd)

REPLACABLE

PARTS

(Cont'd)

5-27.

2-Wire

Ohms

Offset

Calibration...

...

5-8

Digital

(Al)

Assembly

Removal.

. . .

.

6-4

5-29,

2-Wire

Ohms

Gain

Calibration

.

Plug-In

Support

Assembly

5-31.

4-Wire

Ohms

Offset

Calibration

.

.

.

Removal

..<.

esac

¢ 5

aaa

Edy

4

0-5

5-33,

4-Wire

Ohms

Gain

Calibration

2

6-29.

AC

Convertor

(A3)

Assembly

5-35.

DC

Current

Offset

Calibration...

...

5-10

Removal

0-5

5-37.

DC

Current

Gain

Calibration.

.....

.

5-10

6-31.

Analog

(A2)

Assembly

Removal

.

0-5

5-39.

AC

Volts

Offset

&

Gain

6-33.

Front

Panel

Removal...

2.2.0...

6-0

Calibration...

.

.

5-41,

AC

Current

Section

VII

Page

5-43.

Frequency

Calibration

......

.

2

512

MANUAL

CHANGES.........--555%

7A

5-45.

Calibration

Procedures

Rear

Panel

FAs

INtrOdCHOH:.

si i<

sm

acpe

ae

Ha

ged

7-1

Inputs

5-47,

DC

Volts

Offset

Ca!

bration.

..

ee.

5-12

Section

VIII

Page

5-49,

2-Wire

Ohms

Offset

Calibration...

.

.

5-13

SERVICE

accede

nesters

eens

8-1

5-51.

4-Wire

Ohms

Offset

Calibration...

.

.5-14

8-1.

Introduction.

.

. .

2

ted

er

cays.

Bal

:

DC

Current

Offset

Calibration...

..

.5

14

8-2.

Safety

Considerations.

........-

.

8-1

5-55.

Calibration

Procedures

-

44491

A

8-3.

Static

Handling

.

8-2

General

Purpose

Relay

Assy

8-4.

Recommended

Test

Equipment

....

.

8-2

5-56.

Wiring

Block

Preparation

. .

=e

8-5.

General

Block

Diagram

Theory

5-58.

DC

Volts

Offset

Calibration,

...

2...

5-16

of

Operation

8-2

5-59,

2-Wire

Ohms

Offset

Calibration...

..

5-17

8-6.

Chassis

Common

C

8-3

5-60.

4-Wire

Ohms

Offset

Calibration

.

SeL7

8-10.

Floating

Common

Circuitr

8-3

5-61,

DC

Current

Offset

Calibration.

.....

5-17

8-18.

Detailed

Theory

of

Operation

.....

8-5

5-62.

Calibration

Procedures

-

444924

8-19.

Input

Circuitry

. . .

8-5

10

Channel

Multiplexer

Assy.

.

8-26.

Ohms

Current

.

8-11

5-63.

Wiring

Block

Preparation

.

8-31.

A/D

Converter...

0...

6.005

8-13

5-65.

DC

Volts

Offset

Calibration.

.

5-19

8-35:.A/D

‘Controllers.

«isis

es as

8-16

5-66.

2-Wire

Ohms

Offset

Calibration...

.

.

5-19

8-40.

Main

Controller

(03457-66501)...

8-18

8-49.

Main

Controller

(03457-66511)...

8-23

Section

VI

8-55.

AC

to

DC

Converter...

...

REPLACABLE

PARTS........-+++++%

8-63.

44491

A

General

Purpose

6-1.

Introduction.

...

2...

Relay’

Gatdsas

asi

sf

ares.

34-2

stirs

.

8-32

6-3.

Ordering

Information

8-69.

44492A

10

Channel

Reed

GA)

[lated

RARE:

acca,

weeded

wm

SaewS

ee

Multiplexer...

.....

8-35

6-6.

Non-Listed

Parts

.

&

8-71.

Troubleshooting

.

eu

8-35

6-8.

Direct

Mail

Order

System

ee

ee

6-1

8-72.

General

Information

....

soa,

+

(8-36

6-11.

Part

Changes.......

~

8-73.

Al

Assy.

Failure

Indications.

.

..

.

8-36

6-13.

Proprietary

Parts...

. -

6-2

8-74.

A2/A3

Assy.

Failure

Indications

. .

8-36

6-15.

Disassembly/Assembly

Procedures.

.

. .

.6-3

B75.

SE

TESS

6

asiss

coe

eatin

wa

eR

8-36

6-17.

Rear

Terminal

Assembly

Removal.

. .

6-3

8-78.

Self

Test

Changes

for

New

Main

6-19.

Optional

Plug-In

Assembly

Controller

(03457-66511)...

0.6.4

8-44

TRENIOVEL

¢

we

acunsgses

Jr

ee

Ow

Dea

aks

6-3

8-81.

Autocal

(ACAL)

. .

2.

8-46

6-21.

Top

Cover

Removal...

......--5

6-4

8-82.

Plug-in

Cards

.........

...

8-60

8-85.

Replacement

Procedures.

......

8-02

&S

SECTION

|

GENERAL

INFORMATION

The

information

contained

in

this

manual

is

intended

for

the

use

of

service

trained

personnel

who

understand

electronic

circuitry

and

are

aware

of

the

hazards

involved.

Do

not

attempt

to

perform

any

of

the

procedures

outlined

in

this

manual

unless

you

are

qualified

to

do

so.

1-1,

INTRODUCTION

1-2.

This

manual

contains

information

relating

to

the

installation,

operation,

performance

testing,

calibration,

and

service

of

the

HP

3457A

Multimeter.

The

information

is

designed

for

the

use

of

service trained

personnel.

Other

users

should

refer

to

the

HP

3457A

Operating

Manual.

1-3,

MANUAL

DESCRIPTION

1-4,

The

following

paragraphs

provide

a

general

description

of

the

manual

layout

and

content:

&

Section

|.

General

Information

Section

I

contains

a

brief

description

of

the

manual,

and

a

general

description

of

the

instrument.

This

section

also

contains

the

instrument

specifications

and

information

concerning

options

and

accessories.

Section

Il,

Installation

Procedures

Section

IL

contains

information

to

prepare

the

HP

3457A

for

use,

Included

in

this

section

is

power

requirements,

line

voltage

selection,

and

interfacing

information.

Section

Ill.

Operating

Instructions

Section

III

contains

operating

instructions

necessary

to

service

the

HP

3457A.

These

operating

instruc-

tions

are

a

condensed

version

of

those

contained

in

the

Operating,

Programming

and

Configuration

Manual.

Section

IV.

Performance

Tests

Section

IV

contains

information

and

procedures

required

to

test

the

HP

3457A

to

its

rated

specifica-

tions,

Also

included

in

this

section

is

a

condensed

version

of

the

performance

test

(operational

verifica-

tion

test)

which

will

provide

a

more

rapid

test

and

give

a

90%

confidence

that

the

instrument

will

meet

its

specifications.

Section

V.

Calibration

&

Section

V

contains

procedures

required

to

calibrate

the

HP

3457A

to

its

rated

specifications.

General

Information

3457A

Section

VI.

Replaceable

Parts

Section

VI

lists

part

numbers

for

cabinet

parts

and

printed

circuit

assemblies.

Section

VII.

Manual

Backdating

Section

VII

contains

information

required

to

adapt

this

manual

to

instruments

whose

serial

numbers

are

lower

than

those

listed

on

the

title

page.

Section

VIIl.

Service

Section

VII

contains

a

block

diagram

theory

of

operation,

schematic

diagrams,

and

procedures

to

aid

in

troubleshooting

the

HP

3457A.

1-5.

INSTRUMENT

DESCRIPTION

1-6.

The

HP

3457A

is

a

versatile

high

precision

digital

multimeter

which

measures

ac

or

de

volts,

ac

or

de

current,

actde

volts

or

current,

resistance,

frequency

and

period.

It

measures

voltages

up

to

300

Vac

or

300

Vde

with

high

de

resolution

and

accuracy.

The

instrument

is

designed

for

both

bench

and

system

use.

Program

and

reading

storage

are

included

to

allow

high

speed

measurement

applications

with

reading

rates

of

greater-than

1000

read-

ings

per

second.

Provision

has

been

made

for

optional

assemblies

such

as

a

general

purpose

scanner

or

multiplexer

assembly.

1-7.

SAFETY

CONSIDERATIONS

1-8.

The

HP

3457A

is

a

safety

class

|

instrument

(provided

with

a

protective

earth

terminal).

The

instrument

and

manual

should

be

reviewed

for

safety

markings

and

instructions

before

operation.

Refer

to

the

Safety

Summary

preceding

this

section

for

appropriate

safety

instructions

and

markings

covering

this

instrument.

1-9.

INSTRUMENTS

COVERED

BY

THIS

MANUAL

1-10,

Instruments

covered

by

this

manual

are

identified

by

a

serial

number

prefix

listed

on

the

title

page.

Hewlett-Packard

uses

a

two

part

serial

number

in

the

form

xxxxayyyyy,

where

xxxx

is

the

serial

prefix,

a

is

the

country

of

origin

(A=USA)

and

yryyy

is

the

serial

suffix.

The

serial

number

prefix

identifies

a

series

of

identical

instruments.

The

serial

number

suffix

is

assigned

sequentially

and

is

unique

to

each

instrument,

1-11.

If

the

serial

number

prefix

of

your

instrument

is

greater

than

the

one

listed

on

the

title

page,

a

yellow

Manual

Changes

supplement

will

explain

how

to

adapt

this

manual

to

your

instrument.

1-12.

If

the

serial

number

prefix

of

your

instrument

is

lower

than

the

one

listed

on

the

title

page,

information

contained

in

Section

VII

(Manual

Backdating)

will

explain

how

to

adapt

this

manual

to

your

instrument.

1-13.

SPECIFICATIONS

1-14.

Specifications

for

the

HP

3457A

Multimeter

are

listed

in

Table

|-1.

These

specifications

are

the

perfor-

mance

standards

which

the

instrument

is

guaranteed

to

meet.

3457A

General

Information

Table

1-1.

Specifications

DC

VOLTS

INPUT

CHARACTERISTICS:

MAXIMUM

RESOLUTION

READING

RANGE

|6

1/2

digits|6

1/2

digits|5

1/2

digits|4

1/2

digits|3

1/2

digits

30

mv

|

30.30000

10

nv

100

nv

1

uv

10

uv

300

mv}

303.0000

100

nv

1

uv

10

uv

100

uv

3

Vv

3.030000

1

uv

10

uv

100

uv

1

mv

30

Vv

30.30000

10

uv

100

uv

1

mv

10

mv

300

Vv

303.0000

100

uv

1

mv

10

mv

100

mv

INPUT

RESISTANCE

(OHMS):

30

millivolt

through

3

volt

range

-

10

gigaohms

30

volt

and 300

volt

range

-

10

megohms

(+/-

1%)

MAXIMUM

INPUT

VOLTAGE:

(non-destructive)

HI

or

LO

to

Earth

Ground:

+

450V

peak

MEASUREMENT

ACCURACY:

+(%

of

reading

+

Number

of

Counts)

Auto-Zero

ON

24

HOUR:

Tcal

+

1°C

2

hour

warm-up

Accuracy

relative

to

calibration

standard

24

hour

specifications

apply

if

the

instrument

is

calibrated

between

90

and

100%

of

full-scale.

For

calibration

between

33

and

90%

of

full-scale,

add

.00015%

to

%

Reading.

%

READING

NUMBER

OF

COUNTS

100

PLC*

10

PLC*

1

PLC*

+1

PLe*

+005

PLC*

+0005

PLC*

6

1/2

digits|6

1/2

digits|6

1/2

digits|5

1/2

digits|4

1/2

digits|3

1/2

digits

215

235

350

24 25

35

5

6 6

10

20

6 6

90

DAY:

Tcal

+

5°C

After

1

hour

warm-up

RANGE

|

%

READING

NUMBER

OF

COUNTS

100

PLC*

10

PLC*

1

PLC*

+1

PLO*

+005

PLC*

+0005

PLC*

6

1/2

digits|6

1/2

digits|6

1/2

digits]5

1/2

digits|4

1/2

digits|3

1/2

digits

365 385

500

39 40 50

6

Ka

7

41%

20 30

6

c4

Kg