Hp 4262a Service manual

Errata

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Manual Part Number:

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4262A LCR Meter Operating and Service Manual

04262-90007

October 1983

WP

4262A

OPERATING

AND

SERVICE

MANUAL

4262A

DIGITAL

LCR

METER

49621‘«

LCR

A

5

TeATxAmy

1G58

a0

o6

AN

USTTY

(ALe

BLMCIT

1CEAL

@o@%

aJc)

@“%@

o

@u@a

@iﬁ

oo8

um

mwvm

@/ﬂ

HEWLETT

PACKARD

LATAR

)

MANUAL

CHANGES

‘

——

MANUAL

IDENTIFICATION

——

4262A

:

Model

Number:

4262A

Date

Printed:

OCT.

1983

DIGITAL

LCR

METER

Part

Number:

04262-90007

"

This

supplement

contains

important

information

for

correcting

manual

errors

and

for

adapting

the

manual

to

instruments

containing

improvements

made

after

the

printing

of

the

manual.

To

use

this

supplement:

[

Make

all

ERRATA

corrections.

Make

all

appropriate

serial

number

indicated

in

the

tables

below.

SERIAL

PREFIX

OR

NUMBER

MAKE

MANUAL

CHANGES

SERIAL

PREFIX

OR

NUMBER

MAKE

N!ANUAL

CHANGES

A11

1

>

NEW

ITEM

‘

ERRATA

Page

2-8,

Table

2-1:

Add

the

following

item

to

the

option

101

(HP-IB)

components.

PN

2190-0577

2ea.

Spring

Washer

Page

3-22,

Figure

3-9:

Delete

the

following

sentence

from

beneath

the

table

in

step

3:

"*Bias

current

when

+40V

is

applied

to

DC

BIAS

connector."

NOTE

Manual

change

supplements

are

revised

as

often

as

necessary

to

keep

manuals

as

current

and

accurate

as

possible.

Hewlett-Packard

recommends

that

you

periodically

request

the

latest

edition

of

this

supplement.

Free

copies

are

available

from

ail

HP

offices.

When

requesting

copies

quote

the

manual

identification

information

from

your

supplement,

or

the

model

number

and

print

date

from

the

title

page

of

the

manual.

‘

Date/Div:

sep.

19,

1984/33

(ﬁ

HEWLETT

Page

1

of4

Y8

pAcKARD

Printed

in

Japan

»

Page

4-24,

Figure

4-9:

.

)

Correct

the

TTL

outputs

table

in

Figure

4-9

as

follows:

Comparison

|

TTL

output

pins*

LCR

19

20

45

WiGH

|

i

0.C.

LOW

w

|

LOW LOW

0.C.

LOW

j_

_____

LOW

0.C.

LOW

DQ

o

15

16

41

HIGH

0.C.

LOW

N

|

LOW

0.C.

oW

|

LOW

0.C.

LOW

*

TTL

low-level

output

is

indicated

as

LOW,

and

open-collector

turn-off

state

is

indicated

as

0.C.

»

Page

8-47,

Figure

8-29:

Change

the

part

number

for

the

power

transformer

to

9100-0865.

Page

8-53,

Figure

8-39,

Correct

the

flow

diagram

as

shown

below:

PROCEDURE:

1

START

————»

Set

4262A

controls

as

follows:

FUNCTION.

...

..........

C

CIRCUIT

MODE.

...

PRL

LCR

RANGE

.

.......

AUTO

TRIGGER.

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

INT

Unknown

.......

Open(0pF)

Observe

waveforms

at

A14TP5

and

TP4.

Do

they

have

precisely

the

same

phase

as

each

other

for

all

test

frequencies

(120,

1k

and

10kHz)?

See

photo

below.

A14TP4

Al4TP5

NO

()

Q19

Gate

Q22

Gate

Monitor

signals

at

A14Q19

and

Q22

Gates.

Do

they

look

like

this?

5V/div

YES

Monitor

signal

at

A14Q6

Collector.

@

Is

the

waveform

as

illustrated?

Does

the signal

frequency

satisfy

the

table

below?

Is

signal

at

A14TP4

a

squarewave?

NO

I

YES

~

/

\

/

Is

signal

at

A14U9

3

.5Vp-p

pulse?

1

-

NO

!

Check

A14Q8.

\

~

~—

—

YE§'

,

Is

potential

difference

be-

tween

A14Q7

Base

and

Emitter

0.6Vdc?

NC

Check

A14Q7.

YES

Check

A14U9.

Check

Result

A14Q24

Can

a

pulsed

waveform

be

observed

at

A14U8

11?

Is

dc

level

at

A14Q21

(Q24)

Emitter

3V?

éll‘?Q?

Is

amplitude

of

the

pulse

NO

Does

4Vp-p

square

pulse

NO

ollector

at

A14Q6

Collector

15Vp-p?

appear

at

A14U13

pin6?

[~

TEST

SIGNAL

Frequency

/,—YES\\

-

YES\

120Hz 120Hz

(8.3ms)

,

4

~ N

i

~

N

1kHz

(1ms)

"

=

Monitor

signal

at

A14Q6

10kHz

1kHz

(1ms)

Base.

Is

tﬁ'e’

pulse

with.h

1

!

R‘l’jsu‘gvl‘?'i’

E,“‘s"

appear

at

{NO

YES

A

10us?

\

§?

]

\

A

\

[YES

NO/

\

YES

/

N

~

7/

N

7/

J

~

e

-

+ ~

-

_

-

e

Go

to

PROCEDURE

2

NO

Check

A14U13.

Check

A14US.

g;‘fgk

Al4Q6

and

CHANGE

1

»

Page

1-10,

Table

1-4:

Change

the

recommended

oscilloscope

to

the

HP

1740A.

Table

6-3:

Change

the

table

as

shown

below:

Reference

HP

Part

Description

Designation

Number

A14

Q4

1855-0570

TRANSISTOR

J-FET

N-CHAN

SI

RS

(ZERO

ADJ

L)

2100-4086

RESISTOR-VAR

500 10%

66

04262-24004

NUT-HEX-DBL-CHAM

1/4-32-THD

68

2190-0016

WASHER-LK

INTL

T

NO.-3/8

Page

6-25:

Add

a

washer

(reference

designation

(&)

to

the

illustration,

as

shown

below:

|

(’5,”

HEWLETT

PACKARD

OPERATING

AND

SERVICE

MANUAL

MODEL

4262A

LCR

METER

(including

Options

001,004,

010,

and

101)

SERIAL

NUMBERS

This

manual

applies

directly

to

instruments

with

serial

numbers

prefixed

2022J

With

changes

described

in

Section

VI,

this

manual

also

applies

to

instruments

with

serial

numbers

prefixed

1710J,

and

1739J.

For

additional

important

information

about

serial

numbers,

see

INSTRUMENTS

COVERED

BY

MAN-

UAL

in

Section

|.

©

COPYRIGHT:

YOKOGAWA-HEWLETT-PACKARD,

LTD.,1977

9-1,

TAKAKURA-CHO,

HACHIOJI-SHI,

TOKYO,

JAPAN

Manual

Part

No.

04262-90007

_

Microfiche

Part

No.

04262-90057

Printed:

0CT.

1983

Table

of

Contents

Model

4262A

TABLE

OF

CONTENTS

Section

Title

Page

Section

Title

Page

I

GENERAL

INFORMATION.........ccc0utn

1-1

3-30.

Terminal

Configuration

...........

3-10

1-1.

Introduction..........ccivevevnnns

11

3-32.

Offset

Adjustment

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

3-10

1-4,

Description

.....covvviiiiiiennns

1-1

3-40.

Option

Operation

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

3-27

1-8,

Specifications

.....o0ovevenieeennns

1-7

3-42,

Option

001:

BCD

Parallel

Data

1-10.

Safety

Considerations

.........

1-7

Output

...covvieviiieiinnianen,

3-27

1-13.

Instruments

Covered

by

Manual

1-7

3-44.

Output

Data

and

1-18.

Options

..

.veereereennnerannss

1-8

Assignment.........0000nn

3-27

1-20.

Option

001

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

1-8

3-46.

Alternate

Output

of

LCR

and

.

1-22.

Option

004

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

1-8

D/QData....c.ovvunneeenns

3-27

1-24,

Option

101

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

1-8

3-47,

Output

Timing.......o00ven..

3-27

1-26.

Option

010

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

1-8

3-49.

Option

004-COMPARATOR

.......

3-30

1-28.

Other

Options...........

1-8

3-51.

Front

Panel

Features

1-31,

Accessories

Supplied

......c0uen..

1-8

(Figure

3-42)

...cvvvvvvenns

3-30

1-33.

Equipment

Available

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

1-8

3-52.

LIMIT

Setting

Warning

.......

3-31

I

INSTALLATION

.eouvenenneeinnnnnnennns

2-1

3-53.

OUTPUT

Connector

Decision

|

2-1

Introduction

........evvveeeennnns

2-1

[

OWPUL

-

seeeeeeineneeeann

-

2-3.

Initial

Inspection........eevvenenns

2-1

g-gg

Option

101:

HP-IB

.........co.

...

3_33

2-5

Preparation

for

Use

..........0uus

2-1

oo’

Connection

to

HP-IB

Controller

3-3

2-6

Power

Requirements..........

2-1

g'gz

EgéIfLStsﬁflts

;ndlcator

""""

g'gg

. ;

-64.

itech

vovviienennnn.

-

28

Line

Vollage

and

Fuse

Selection

2

3-65.

HP-IB

Interface

Capabilities

..

3-32

2-14:

Interconnectic;n.s'

.

.........

2-3

3-66.

S(;;lrrfgsﬁzﬁ

é(:si{efto;}n

3_39

2-16.

Operating’

Environment........

2-3

3-67

Talier

Cap(;bilit

’

T5

e

3-39

2-19,

Installation

Instructions

.......

2-3

368,

Functions

Relate‘(’i'to

o

2-21,

Installation

of

Options

)

Talker

Capabilit

3-33

907,

908

and

909

......

2-3

sarker

Lapaplily

...

..

2-23.

Storage

and

Shiﬁment

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

2-3

3-69.

Listener

Capability:

L4

.

3-33

9-24.

Environment

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

2-3

3-70.

Service

Request

2-26.

PACKAgING

+vvvvvverenronnnns

2-3

371

Capability:

SR

.......

3-33

2-29.

Option

IStallation

...

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

2-6

-1,

R‘émtg./llft“,aém

336

2-31,

Option

001

BCD

Data

Output

372

Do

e

-

TNSEAllAtion

«.eeeennnnnenes..

2-6

-12.

‘é‘;’;f:bﬁif;_rDcl

536

a3

O

stallation

1

.

2-6

3-13.

Device

Trigge”

|

336

2-33.

Coupling

Option

004

Comparator

374,

ADDRESS

Switch

..

..r..10..

3.36

giggpﬁgga?&tilgflj

Data

9.6

3-75,

Remote

Message

Coding......

3-36

2-34.

Option

101

HP-IB

Remote

Control

and

Data

Output

Installation.

.. 2-6

1V

ERFOURCRCRIRST

oo

40

4-3.

Equipment

Required

.....e0e0uvuns

4-1

4-5.

TestRecord

.....covevesenasanaes

4-1

II

OPERATION

.......cuveiennnnenenennnnns

3-1

4-7.

Calibration

Cycle.................

4-1

3-1.

INtroduction............ceeeesne..

3-1

——

Preliminary

Qperations

...........

4-2

3-3.

Panel

Features.........couvueunes

3-1

——

Calibration

of

DUT's..............

4-4

3.5

Self

Test

(Basic

Operating

Check)

..

3-1

4-9,

Measu_rement

Frequency

Test......

4-17

3-7.

Test

Signals

....ovvveererennnnnns

3-6

4-10.

Capacitance

Accuracy

Test

........

4-8

3-9.

Measurement

Range

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

3-6

4-11.

Resistance/ESR

Accuracy

Test....

4-12

3-11.

Initial

Display

Test

«.eeuvervenn...

3-17

4-12.

Dissipation

Factor

Confirmation

Check

.

4-14

3-13.

Initial

Control

Settings

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

3-1

4-13,

Inductance

Accuracy

Test

........

4-117

3-15.

D/Q

Measurement

............o...

3.7

4-14.

Internal

DC

Bias

Source

Test

.....

4-19

3-17.

LCR

Measurement

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

3.7

4-15.,

Offset

Adjustment

Test..oevvuinnn

4-20

3-19.

D/Q

Blanking

Function

(Switch

4-16,

Comparator

Test

(Option

004

Only)

4-22

selectable

function

inside

cabinet).

3-9

4-17.

HP-IB

Interface

Test

3-21,

General

Component

Measurement

..

3-9

(Option

101

Only)

..eeuennnnnnnn.

4-25

3-23.

Semiconductor

Device

Measurement

3-9

3-25.

External

DCBias........c.c.c.une

3-9

3-28.

External

Triggering

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

3-9

ii

Model

4262A

TABLE

OF

CONTENTS

Section

Title

Page

V

ADJUSTMENT

..........

Cesseretreannaas

5-1

5-1.

Introduction...........oveueuennnn.

5-1

5-3.

Safety

Requirements

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

5-1

5-7.

Equipment

Required

........00v...

5-1

5-9,

Factory

Selected

Components

......

5-1

5-12.

Adjustment

Relationships..........

5-1

5-14,

Adjustment

Locations

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

5-1

5-16.

DUT

Adjustment

Recommendations

.

5-4

5-1

Initial

Operating

Procedure........

5-5

5-20.

DC

Power

Supply

Adjustment,......

5-6

5-21.

Nanoprocessor

Operating

Power

Voltage

Adjustment..............

5-7

5-22.

Al2

Board

Offset

Adjustment.......

5-8

5-23.

Al3

Board

Offset

Adjustment,......

5-9

5-24.

Al4

Phase

Detector

&

Integrator

Adjustment

........c0iiiinnnn.

5-14

5-25.

10kHz

Measurement

Accuracy

Adjustment

......ciivviiennnnns

5-17

5-26.

C

Zero

ADJ

Circuit

Adjustment

(AL2)

L.ttt

i

et

5-22

VI

REPLACEABLE

PARTS

...cvvvnivienennss

6-1

6-1.,

Introduction.......eeovvvennnn

eees

B-1

6-3.

Abbreviations

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

cerrras

6-1

6-5.

Replaceable

Parts

List............

6-1

6-7.

Ordering

Information

.........

eees

6-2

6-12.

Direct

Mail

Order

System

.........

6-2

VII

MANUAL

CHANGES

..

..0iitvitverenennnn

7-1

7-1.

Introduction..........ccvvvvueenn.

7-1

7-3.

Manual

Changes

......covvveevnnren

7-1

VIISERVICE

.....vtiiiteiiiinsenecenconnnens

8-1

8-1.

Introduction.........ceeoeeeenevenn

8-1

8-3.

Theory

of

Operation

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

8-1

8-5.

Troubleshooting

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

creeas

8-1

8-7.

Recommended

Test

Equipment

.....

8-1

8-9

Repair..civieeereninrannnns

cesese

8-1

Section

8-11,

8-21,

8-22.

8-23.

Table

of

Contents

Title

Page

Basic

Theory

....vevvveeenecnnnas

8-2

Principles

of

Operation

,..........

8-4

Block

Diagram

Discussion.........

8-8

Analog

Section

Discussion

....,

8-8

All

Oscillator

and

Source

Resistor

.......

8-8

Al2

Range

Resistor......

8-8

Al3

Process

Amplifier.,.,

8-8

Al4

Phase

Detector

and

Integrator.............

8-8

Digital

Control

Section

.......

8-10

A23

Processor

and

ROM

8-10

A21

Keyboard

Control

..

8-11

A22

Display

Control

&RAM

.......ccuvt..

8-11

A2

Display

and

Keyboard

8-11

Timing

Diagram

Discussion.......

8-12

Options...vvverevennnnne

cesesenn

8-14

Option

001

BCD

Data

Output

(A35)

......

ceeiaesens

8-14

Option

004

Comparator

(A4,

A5

&

A24).............

8-15

Option

101

HP-IB

Compatible

(A25)..........

.

8-15

Troubleshooting

........c0vvveve.

8-16

Repair....ovvviieiiiennncennnasns

8-26

Removal

of

Q2

and

Q3

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

8-26

Line

Switch

(S1)

Removal.........

8-26

Protective

Diode

Replacement

(CR4,

CR5,

CR6

and

CRT)......

.

8-27

ZERO

ADJ

Control

Potentiometer

(R4

and

R5)

Replacement........

8-217

A2

Keyboard

and

Display

Board

Disassembly.............

8-27

Keyboard

Switch

LED

Replacement

8-28

Product

Safety

Checks............

8-29

iii

List

of

Tables

List

of

Ilustrations

LIST

OF

TABLES

Number

Title

Page

1-1

Specifications

....vvevvrvernncenns

1-2

General

Information,..............

1-6

1-3.

Equipment

Available

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

1-9

1-4

Recommended

Test

Equipment

....

1-10

2-1,

Option

Components

.........c.....

2-8

3-1

Test

Signal

Level....cvieeeeeeennn

3-6

3-2

Measurement

Ranges.......o.v0...

3-6

3-3.

Annunciation

Display

Meanings....

3-12

3-4.

Unusual

Operating

Indications.....

3-21

3-60.

Remote

Program

Codes

..........

3-32

3-61,

Remote

Message

Coding.,........

3-33

4-1.,

Recommended

Components

for

Accuracy

Checks

......c0uvee

4-6

Number

Title

Page

1-1,

Model

4262A

and

Accessories......

1-1

1-2,

Serial

Number

Plate

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

1-7

2-1

Voltage

and

Fuse

Selection,........

2-2

Power

Cable

.......ocviiiiiinenn.

2-4

2-3

Rack

Mount

Kit...................

2-5

2-4

Option

Installation

Hlustrations.....

2-7

3-1

Front

Panel

Features

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

3-2

Rear

Panel

Features..............

3-4

3-3

Test

Fixture

and

Leads............

3-8

3-4

Measurement

Error

due

to

Misadjusted

ZERO

ADJ

controls

..

3-10

3-5.

Conversion

between

Parallel

and

Series

Equivalents

...........

3-6.

Relationship

of

Dissipation

to

Series

and

Parallel

Resistance....3-13

-40,

Assignments

of

Qutput

Connector

and

Output

Format.....

External

DC

Bias

Circuits......

3-7.

General

Component

Measurements.

.,

3-15

3-8.

Semiconductor

Device

Measurement

3-18

3-9

...3-20

3-4

3-28

3-41.

Timing

Chart

of

BCD

Data

Output...3-29

3-42.

Front

Panel

Features

..........

3-43.

Option

004:

COMPARATOR

.....

3-44.

Location

of

Comparator

Data

Qutput

...

.vevvenennnens

iv

4-1

Measurement

Frequency

Test

Setup.,

4-7

4-2.

Capacitance

Accuracy

Test

Setup...

4-8

4-3

Resistance

Accuracy

Test

Setup....4-12

Model

4262A

Title

Page

Adjustable

Components............

5-2

,

Factory

Selected

Components

......

5-3

DUT's

Recommended

for

Making

Adjustments

........

..

5-4

Adjustment

Requirements..........

5-5

List

of

Reference

Designators

and

Abbreviations.............

6-1

Manufacturers

Code

List

..........

6-2

Replaceable

Parts

....ovvvvenennns

6-3

Option

010

Modifieation

.........

e

6-24

Manual

Changes

by

Serial

Number..

7-1

Summary

of

Changes

by

Assembly..

7-1

Currently

Available

Options

......

8-14

Symptoms

Likely

to

Mislead

......

8-18

Front

Panel

Symptoms

of

Internal

Control

Misadjustment

.......

8-19

Front

Panel

Isolation

Procedure

..

8-20

Title

Page

Dissipation

Factor

Confirmation

Check

SetUpPS:

«eeersnnenes

e

ereeeasaan

4-14

Inductance

Accuracy

Test

Setup

...

4-17

Internal

DC

Bias

Source

Test

SetUpP.vviierteenrencsrnnens

4-19

Offset

Adjustment

Test

Setup......

4-20

Comparator

Test

Setups..........

4-22

Comparator

Output

(J6)

data

format

4-24

HP-IB

Interface

Test

Setup

.......

4-25

SRQ

Service

Routing

.....

cresenas

4-29

Power

Supply

Voltage

Adjustment...

5-6

Nanoprocessor

Operating

Power

Voltage

Adjustment

Location

.....

5-7

Al2

Board

Offset

Adjustment

......

5-8

Waveform

at

A12Q11

Source

.......

5-9

Al3

Board

Offset

Adjustment.......

5-9

Waveform

at

A13TP1

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

5-10

Waveform

at

A13TP2

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

5-11

Waveform

at

A13TP3

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

5-12

Ald

Phase

Detector

&

Integrator

Adjustment

......ciiiienanian.

5-13

A228S1

Switch

Setting

.

....v.ue....

5-14

Zero

Detector

&

APAO

Adjustments

5-15

10kHz

Measurement

Accuracy

Adjustment

..

...iiiieiieneeenn

5-17

Offset

Adjustment

Setup

..........

5-22

Major

Mechanical

Parts

-

Exploded

View

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

6-23

Mechanical

Parts

-

Exploded

View

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

6-25

CERTIFICATION

Hewlett-Packard

Company

certifies

that

this

product

met

its

published

specifica-

tions

at

the

time

of

shipment

from

the

factory.

Hewlett-Packard

further

certifies

that

its

calibration

measurements

are

traceable

to

the

United

States

National

Bu-

reau

of

Standards,

to

the

extent

allowed

by

the

Bureau's

calibration

faecility,

and

to

the

calibration

facilities

of

other

International

Standards

Organization

members.

WARRANTY

This

Hewlett-Packard

instrument

product

is

warranted

against

defects

in

material

and

workmanship

for

a

period

of

one

year

from

date

of

shipment,

except

that

in

the

case

of

certain

components

listed

in

Section

1

of

this

manual,

the

warranty

shall

be

for

the

specified

period.

During

the

warranty

period,

Hewlett-Packard

Company

will,

at

its

option,

either

repair

or

replace

products

which

prove

to

be

defective.

For

warranty

service

or

repair,

this

product

must

be

returned

to

a

service

facility

designated

by

HP.

Buyer

shall

prepay

shipping

charges

to

HP

and

HP

shall

pay

shipping

charges

to

return

the

product

to

Buyer.

However,

Buyer

shall

pay

all

shipping

charges,

duties,

and

taxes

for

products

returned

to

HP

from

another

country.

HP

warrants

that

its

software

and

firmware

designated

by

HP

for

use

with

an

in-

strument

will

execute

its

programming

instructions

when

properly

installed

on

that

instrument.

HP

does

not

warrant

that

the

operation

of

the

instrument,

or

soft-

ware,

or

firmware

will

be

uninterrupted

or

error

free.

LIMITATION

OF

WARRANTY

The

foregoing

warranty

shall

not

apply

to

defects

resulting

from

improper

or

inade-

quate

maintenance

by

Buyer,

Buyer-supplied

software

or

interfacing,

unauthorized

modification

or

misuse,

operation

outside

of

the

environment

specifications

for

the

product,

or

improper

site

preparation

or

maintenance.

NO

OTHER

WARRANTY

IS

EXPRESSED

OR

IMPLIED.

HP

SPECIFICALLY

DIS-

CLAIMS

THE

IMPLIED

WARRANTIES

OF

MERCHANTABILTY

AND

FITNESS

FOR

A

PARTICULAR

PURPOSE.

EXCLUSIVE

REMEDIES

THE

REMEDIES

PROVIDED

HEREIN

ARE

BUYER'S

SOLE

AND

EXCLUSIVE

REMEDIES.

HP

SHALL

NOT

BE

LIABLE

FOR

ANY

DIRECT,

INDIRECT,

SPECIAL,

INCIDENTAL,

OR

CONSEQUENTIAL

DAMAGES,

WHETHER

BASED

ON

CON-

TRACT,

TORT,

OR

ANY

OTHER

LEGAL

THLORY.

ASSISTANCE

Product

maintenance

agreements

and

other

customer

assistance

agreements

are

available

for

Hewlett-Packard

produects.

For

any

assistance,

contact

your

nearest

Hewlett-Packard

Sales

and

Service

Office.

Addresses

are

provided

at

the

back

of

this

manual.

SAFETY

SYMBOLS

General

Definitions

of

Safety

Symbols

Used

On

Equipment

or

In

Manuals.

WARNING

CAUTION

Note

Instruction

manual

symbol:

the

product

will

be

marked

with

this

symbol

when

it

is

necessary

for

the

user

to

refer

to

the

instruction

manual

in

order

to

protect

against

damage

to

the

instrument.

Indicates

dangerous

voltage

(terminals

fed

from

the

interior

by

voltage

exceeding

1000

volts

must

be

so

marked).

Protective

conductor

terminal.

For

protection

against

eleetri-

cal

shock

in

case

of

a

fault.

Used

with

field

wiring

terminals

to

indicate

the

terminal

which

must

be

connected

to

ground

before

operating

equipment.

Low-noise

or

noiseless,

clean

ground

(earth)

terminal.

Used

for

a

signal

common,

as

well

as

providing

protection

against

elec-

trical

shock

in

case

of

fault.

A

terminal

marked

with

this

symbol

must

be

connected

to

ground

in

the

manner

described

in

the

installation

(operating)

manual,

and

before

operating

the

equipment.

Frame

or

chassis

terminal.

A

connection

to

the

frame

(chas-

sis)

of

the

equipment

which

normally

includes

all

exposed

metal

structures.

Alternating

current

(power

line).

Direct

current

(power

line).

Alternating

or

direct

current

(power

line).

A

WARNING

denotes

a

hazard.

It

calls

attention

to

a

pro-

cedure,

practice,

condition

or

the

like,

which,

if

not

correctly

performed

or

adhered

to,

could

result

in

injury

or

death

to

personnel.

The

CAUTION

sign

denotes

a

hazard.

It

calls

attention

to

an

operating

procedure,

practice,

condition

or

the

like,

which,

if

not

correctly

performed

or

adhered

to,

could

result

in

damage

to

or

destruction

of

part

or

all

of

the

product.

A

Note

denotes

important

information.

It

ecalls

attention

to

a

procedure,

practice,

condition

or

the

like,

which

is

essential

to

highlight.

Model

4262A

O

0O

OO

OO0

O

Co

o

]

=

0

0TI

DUT

WD

LIST

OF

ILLUSTRATIONS

Title

Page

Basic

Block

Diagram

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

8-2

Cp

Measurement

......coeeevenesn

8-3

Measurement

Principles...........

8-7

Offset

Control

Principle...........

8-6

DC

Bias Circuit

....o0vviveinennn.

8-6

Analog

Section

Block

Diagram......

8-9

Digital

Section

Block

Diagram......

8-11

Timing

Diagram

......ecevveennan

8-13

Option

Section

Block

Diagram......

8-15

How

to

Use

Troubleshooting

Guides.8-17

Self

Test

Function

...........0uuun

8-21

Signature

Analysis

Guide

..........

8-23

Protective

Diode

and

ZERO

ADJ

Control

Potentiometer

Replacement...........co0vunnnn

8-26

A2

Keyboard

and

Display

Board

Disassembly.....cco0vueen.

8-217

Inserting

Tubing

into

Switch

Plunger

8-28

LED

Installation

in

Switch

.........

8-28

Analog

and

Digital

Section

Isolation

Procedure

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

8-31

Analog

Section

Troubleshooting

Procedure

to

Assembly

Level.....8-33

Digital

Section

Troubleshooting

Procedures

................l.

8-35

Schematic

Diagram

Notes........

..8-43

Assembly

Locations.......ovoevvess

8-43

Adjustment

Locations

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

8-43

Front

Panel

Component

Locations

..

Rear

Panel

Component

Locations...

A2

Keyboard

&

Display

Board

Assembly

Component

Locations...

A2

Keyboard

&

Display

Board

Assembly

Schematic

Diagram

....

A9

Power

Supply

Board

Troubleshooting

Tree............

8-46

A9

Power

Supply

Board

Assembly

Component

Locations

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

8-417

A9

Power

Supply

Board

Assembly

Schematic

Diagram

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

8-417

All

OSC

&

Source

Resistor

Board

Troubleshooting

Tree............

8-48

All

OSC

&

Source

Resistor

Board

Assembly

Component

Locations

..

All

OSC

&

Source

Resistor

Board

Assembly

Schematic

Diagram

..,.8-49

Al2

Range

Resistor

Board

Troubleshooting

Tree

...........

8-50

Al2

Range

Resistor

Board

Assembly

Component

Locations

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

8-51

Al2

Range

Resistor

Board

Assembly

Schematic

Diagram.....

8-51

Al3

Process

Amplifier

Board

Troubleshooting

Tree............

8-52

Number

8-37.

8-38,

8-39.

8-40,

8-41,

8-42.

8-43.

8-44,

8-45.

8-46.

8-417.

8-48.

8-49.

8-50,

8-51,

8-52.

8-53.

8-54.

8-55.

8-56.

8-517.

8-58.

8-59.

8-60.

List

of

Illustrations

Title

Al13

Process

Amplifier

Board

Assembly

Component

Locations.

..

Al3

Process

Amplifier

Board

Assembly

Schematic

Diagram.....

8-53

Al4

Phase

Detector

&

Integrator

Board

Troubleshooting

Tree(A)

...

Al4

Phase

Detector

&

Integrator

Board

Troubleshooting

Tree(B)

...

Al4

Phase

Detector

&

Integrator

Board

Assembly

Component

Locations

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

8-57

Al4

Phase

Detector

&

Integrator

Board

Assembly

Schematic

Diagram

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

8-57

A21

Keyboard

Control

Board

Assembly

Component

Locations,

..

A2l

Keyboard

Control

Board

Assembly

Schematic

Diagram

....

A22

Display

Control

&

RAM

Board

Assembly

Component

Locations...8-61

A22

Display

Control

&

RAM

Board

Assembly

Schematic

Diagram

...

A23

Processor

&

ROM

Board

Assembly

Component

Locations...8-63

A23

Processor

&

ROM

Board

Assembly

Schematic

Diagram

...

A4

Thumbwheel

Switch

Board

Assembly

Component

Locations...8-65

A5

Comparator

Keyboard

Board

Assembly

Component

Locations...8-65

A4

Thumbwheel

Switch

Board

and

A5

Comparator

Keyboard

Board

Assembly

Schematic

Diagram

.

A24

Comparator

Control

Board

Diagnostic

Flow

Diagram

........

8-66

A24

Comparator

Control

Board

Assembly

Component

Locations...8-67

A24

Comparator

Control

Board

Assembly

Schematic

Diagram

A25

HP-IB

Interface

Board

Diagnostic

Flow

Diagram.........

8-68

A25

HP-IB

Interface

Board

Assembly

Component

Locations..,8-69

A25

HP-IB

Interface

Board

Assembly

Schematic

Diagram

...

A35

BCD

Output

Control

Board

Diagnostic

Flow

Diagram

........

8-70

A35

BCD

Output

Control

Board

Assembly

Component

Locations...8-71

A35

BCD

Output

Control

Board

Assembly

Schematic

Diagram

...

.8-61

.8-63

..8-65

cee.8-67

.8-69

.8-71

Model

4262A

Section

I

Paragraphs

1-1

to

1-6

SECTION

|

GENERAL

INFORMATION

1-1.

INTRODUCTION.

1-2.

This

operating

and

service

manual

contains

the

information

required

to

install,

operate,

test,

adjust

and

service

the

Hewlett-Packard

Model

4262A

Digital

LCR

Meter.

Figure

1-1

shows

the

in-

strument

and

supplied

accessories.

This

section

covers

specifications,

instrument

identification,

description,

options,

accessories,

and

other

basic

information.

1-3.

Listed

on

the

title

page

of

this

manual

is

a

microfiche

part

number.

This

number

can

be

used

to

order

4

x

6

inch

microfilm

transparencies

of

the

manual.

Each

microfiche

contains

up

to

60

photo-

duplicates

of

the

manual

pages.

The

microfiche

package

also

includes

the

latest

manual

changes

supplement

as

well

as

all

pertinent

service

notes.

To

order

an

additional

manual,

use

the

part

num-

ber

listed

on

the

title

page

of

this

manual.

1-4.

DESCRIPTION.

1-5.

The

HP

Model

4262A

LCR

Meter

is

a

general

purpose,

fully

automatic

test

instrument

designed

to

measure

the

parameters

of

an

impedance

ele-

ment

with

high

accuracy

and

speed.

The

4262A

measures

capacitance,

inductance,

resistance

(equi-

valent

series

resistance)

and

dissipation

factor

or

quality

factor

over

a

wide

range

at

test

frequencies

of

120Hz,

1kHz

and

10kHz

employing

a

five-term-

inal

connection

configuration

between

the

com-

ponent

and

the

instrument.

The

measuring

circuit

for

the

device

to

be

measured

is

capable

of

both

parallel

and

series

equivalent

circuit

measurements

and

the

measured

values

are

displayed

by

the

two

three-full

digits

LED

displays

on

the

front

panel.

A

convenient

diagnostic

function,

also

featured

in

the

4262A,

is

actuated

by

a

SELF

TEST

switch.

This

confirms

functional

operation

of

the

instrument.

1-6.

The

measuring

range

for

capacitance

is

from

0.01pF

to

19.99mF,

inductance

from

0.01uH

to

1999H,

and

resistance

from

1mQ

to

19.99MQ,

which

are

measured

with

a

basic

accuracy

of

0.2

to

0.3%

depending

on

test

signal

level,

frequency,

and

measuring

equivalent

circuit,

and

at

typical

measuring

speeds

of

220

to

260

milliseconds

at

P/N

8120-1378

Figure

1-1.

Model

4262A

and

Accessories.

11

Section

1

Table

1-1

Model

4262A

Table

1-1.

Specifications

(Sheet

1

of

4).

COMMON

SPECIFICATIONS

Parameters

Measured:

C

-

D

or

Q

(1/D)

L-DorQ(1/D)

R

(ESR)

(Loss

measure-

ment

can

be

negated

by

switch

on

internal

board).

Display:

3-1/2

Digit,

Maximum

Display

1999

(When

D

value

is

more

than

10,

max-

mum

display

is

199).

Measurement

Circuit

Modes:

Auto,

Parallel,

and

Series

Measurement

Terminals:

5-terminal configura-

tion

(high

and

low

terminals

for

both

potential

and

current

leads

plus

guard).

Range

Modes:

LCR

-

Auto

and

Manual

(up-down)

Deviation

Measurement:

When

2ALCR

key

is

de-

pressed,

the

existing

measured

value

is

stored

as

a

reference

value

and

displayed

value

is

offset

to

zero.

The

range

is

held

and

deviation

is

dis-

played

as

the

difference

between

the

referenced

value

and

subsequent

re-

sult.

(Deviation

spread

in

counts

from

-999

to

1999).

Offset

Adjustment:

Stray

capacitance

and

re-

sidual

inductance

of

test

jig

can

be

compensated

for

as

follows:

C:

up

to

10pF

L:

up

to

1uH

Self

Test:

Annunciates

either

Pass,

or

Fail

for

performance

in

each

of

the

five

basic

DQ

-

Auto

and

Manual

(step)

ranges.

DC

Bias:

Measurement

Frequencies:

120(100)Hz,

1kHz

Internal:

1.6V,

2.2V,

6V

(Selectable

at

front

and

10kHz

1+3%.

panel).

Accuracy

£5%

External:

External

DC

bias

connector

on

rear

panel.

Maximum

+40V.

Test

Signal

Level:

Normal

level:

1Vrms.

Low

level

:

50mVrms

(parallel

Trigger:

Internal,

External,

or

Manual

capacitance

mode

only)

Warm-up

Time:

15

minutes

GENERAL

Operating

Temperature

&

Humidity:

0°C

to

55°C

at

95%

RH(to

40°C)

Power

Requirements:

100/120/220V

+10%,

240V

+5%

-10%

48

-

66Hz

Power

Consumption:

55VA

with

any

option

Dimensions:

426(W)

x

147(H)

x

345(D)mm

(16-3/4°

x

5-3/4”

x

13-3/4”)

Weight:

Approximately

8kg

(Std)

1-2

Model

4262A

Section

I

Table

1-1

Table

1-1.

Specifications

(Sheet

2

of

4).

C-D,

C-QMEASUREMENT

120Hz|1000pF

|10.00nF|100.0nF|1000nF

[10.004F[100.0uF|1000uF

[10.00mF

C

1kHz|100.0pF{1000pF

|10.00nF|100.0nF

1000nF|10.00xF|100.0uF|1000uF

10kHz|

10.00pF|100.0pFj1000pF

{10.00nF|100.0nF|1000nF

|10.00uF{100.0uF

Ranges

D

.001~19.9

(2

Ranges)

Q™

0.05~-1000

(4

Ranges)

o

1V

or

50mV

(LOW

LEVEL)

]

Test

Signal

W

[100A

1004A

1mA

10mA

40mA|

Level

=2

AUTO

[

Sameas

i}

Mode

||

Sameas

4rw

Mode

|

[

0.2%

+

1

counts

|

(Test

signal

level;

1V)

{u}

[

2=

[

0.3%

+ 2

counts

|

(Test

signal

level;

50mV)

C

Accuracy

*3

A

(At

120Hz,

1kHz)

|

0.83%+2counts

||

3%

|[

e’

(At

10kHz)

|

0.3%

+2counts

|[1%

+

2][5%

+

2]

AUTO

||

Sameas

¥

Mode

||

Sameas

4w

Mode

|

[

0.2%

+

(2

+

200/Cx)

counts

|

At

120Hz,

1kHz

|

055%

+

(2.+

200/Cx)

counts

]

L

Lest

signal

level;

1V)

R

|

0:3%

+

(2

+

1000/Cx)

counts

|

At

120Hz,

1kHz

DA

[1.0%

+

(2

1000/Cx)

counts

|\

0"

50

evel;

50mV)

v

(At120Hz,

1kHz)

[

0.3%

+

(2

+

Cx/500)

counts

|f-6-S5)

(At

10kHZ)

L

0.5%

+

(2

+

Cx/500)

counts

I[l%f(ﬁ‘

Cx

1IE%+(54

o}

500

00!

51

AUTO

[

Sameas

T+

Mode

||

Sameas

-AM#w

Mode

|

*1

Calculated

from

D

value

as

a

reciprocal

number.

*2

Typical

data,

varies

with

value

of

D

and

number

of

counts.

*3

#(%

of

reading

+

counts). Cx

is

capacitance

readout

in

counts.

This

accuracy

only applies

for

D

values

to

1.999.

(For

higher

D

values,

refer

to

General

Information).

*4

(5%

+

2

counts)

at

1kHz.

Accuracy

applies

over

a

temperature

range

of

23°C

£

5°C

(At

0°C

to

55°C,

error

doubles).

Note:

C

accuracy

for

higher

D

values

are

unspecified.

1-3

Section

I

Model

4262A

Table

1-1

Table

1-1.

Specifications

(Sheet

3

of

4).

L-D,

L-Q

MEASUREMENT

120Hz

|

1000xH

|

10.00mH|100.0mH

[1000mH

|10.00H

|

100.0H

|

1000H

L

1kHz|

100.04H

|

1000¢H

|10.00mH

[100.0mH

|

1000mH

|

10.00H

|

100.0H

Ranges

10kHz

|

10.00xH

[

100.04H

[1000xH

[10.00mH

|

100.0mH|

1000mH

|

10.00H

D

.001~19.9

(2

Ranges)

Q"

0.05~

1000

(4

Ranges)

Lo+

L

1v

]

TestSignal

"

o

|

40mA

_

10mA

ImA

_

100uA

_

104A

|

auto

||

Sameas

™

Mode

||

Sameas

Tt

Mode

|

(At

120Hz,

1kHz)

[

0.83%+2counts

|[

1%+

2counts

|

'@D"

(At

10kHz)

[

0.3%

+2counts

|[1%+2

]

5%+2

|

L

Accuracy*s

[

0.2%

+

2

counts

|

(At

120Hz,

1kHz)

T

W

[0.3%

+

2]

0.2%

+

2

counts

|

(At

10xHz)

auto

||

Sameas

-w

Mode

||

Sameas

{JY

Mode

|

(At

120Hz,

1kHz)

[0.8%

+

(3

+

Lx/500)[1%

+

(3

+

Lx/500)

-(33}

(At

10kHz)

[0.5%

+

(3

+

Lx/500)|

[

15+

6%

|[

s+

65

|

R((xl:{?gc

L

0.2%

+

(3

+

200/Lx)

counts

—l

(At

120Hz,

1kHz)

y

-

[

0.5%

+

(8

+

200/Lx)

counts

|

(At

1kHz)

AUTO

||

Sameas

-www

Mode

||

Sameas

-@-

Mode

|

*1

Calculated

from

D

value

as

a

reciprocal

number.

*2

Typical

data,

varies

with

value

of

D

and

number

of

counts.

*3

3(%

of

reading

+

counts).

Lxis

inductance

readout

in

counts.

This

accuracy

only

applies

for

D

values

to

1.999.

Accuracy

applies

over

a

temperature

range

of

23°C

%

5°C.

(At

0°C

to

55°C,

error

doubles).

R/ESR

MEASUREMENT

120Hz

Ranges

R/ESRlil)kHZ

1000m$2

[10:008

[100.0Q

|

1000

[10.00k22[100.0k$2|1000k2)10.00MS2

kHz

Enian

[

1v

]

i

—1wW—

.

Test

Signal

40mA

10mA

1mA

100uA

10uA

Level

*1

YA

AUTO

||

Sameas

4bw--mwwMode

|[

Sameas

1wt

Mode

|

o

[

0.3%

+

2

counts

*?

]

-

0.2%

+

2

ts

|

Accuracy

*2

W

2%

coun

AUTO

||___Sameas

4pw-wrw-Mode

|[

Sameas

Gt

Mode

|

*1

Typical

data,

varies

with

number

of

counts.

*2

£(%

of

reading

+

counts).

*3

(0.5%

+

2

eounts)

on

10.00MQ

range

at

10kHz.

*%

Measurement

range

for

ESR

(equivalent

series

resistance)

is

from

1m$

to

19.99kQ

(typical),

which

varies

with

series

capacitance

and

inductance

value

. .

refer

to

“REFERENCE

DATA”.

Accuracy

applies

over

a

temperature

range

of

23°C

£

5°C.

(At

0°C

to

55°C,

error

doubles.)

1-4

Model

4262A

Section

I

Table

1-1

Table

1-1.

Specifications

(Sheet

4

of

4).

OPTIONS

Option

001:

Simultaneous

BCD

output

of

LCR

and

DQ

data

(positive

true).

Max.

sink

current

16mA.

Mating

connector

(P/N

1251-0086).

(Alternate

BCD

output

of

LCR

and

DQ

data

selectable

by

switch

on

internal

board).

Option

004:

Digital

comparator

(can

not

be

used

with

OPT

101).

Compares

meas-

ured

value

with

high

and

low

limit

set-

tings

for

LCR

or

DQ

and

provides

HIGH,

IN,

LOW

comparison

outputs.

Limit

setting

range:

0000

-

1999

for

each

limit

switch.

Comparison

output:

Visual,

relay

contact,

and

TTL

level.

Visual:

3

LED’s

indicate

HIGH(red),

IN

(green),

or

LOW

(red).

Relay

contacts:

SPST

contacts

to

circuit

common

for

each

HIGH,

IN

and

LOW

output.

TTL

level:

Open

collector

circuits

to

high

level

(open)

for

each

HIGH,

IN

and

LOW

outputs

(fanout

max.

30mA).

Option

101:

HP-IB

data

output

&

remote

con-

trol.

Remotely

controllable

functions:

Function

(L,

C,

R/ESR,

2LCR)

Loss

(D,

Q)

LCR

range

DQ

range

Circuit

mode

Test

frequency

& level

Trigger

Self

test

Data

output:

C

-

D/Q,

L

-

D/Q,

R/ESR

Internal

function allowable

subsets:

SH1,

AH1,

T5,

L4,

RL1,

DC],

SRl

and

DTI.

Data

output

format:

Either

of

two

formats

may

be

selected.

Switchable

at

rear

panel

(no

+

sign

outputs).

Format

A.

SFFT+N.NNNE+NN,

SF+N.NNCRYLE)

Format

B.

SFFT+N.NNNE+NNCRYLF)

SF+N.NNCR(LE)

SFET

LL

Test

Frequency

Measurement

Equivalent

Circuit

LMeasurement

Status

SF

[—Loss

measurement

D

or

Q

‘“—Measurement

status

Option

010:

100Hz

test

frequency

instead

of

120Hz,

ACCESSORIES

AVAILABLE

16061A:

Test

fixture,

direct

coupled,

5-terminal

Two

kinds

of

inserts

are

included

for

components

with

either

axial

or

radial

leads.

Usable

on

all

ranges

of

4262A.

16062A:

Test

cable

with

alligator

clips,

4-termi-

nal.

Useable

for

low

impedance

meas-

urements.

Measurement

range

at

1kHz

is

L

£

2H,

C

2

200nF

and

R

£

10kQ.

[For

L

and

C

measurements,

these

ranges

increase

by

x10

at

120

(100)Hz

and

decrease

by

same

factor

at

10kHz].

16063A:

Test

cable

with

alligator

clips,

3-termi-

nal.

Useable

for

high

impedance

meas-

urements.

Measurement

range

at

1kHz

isL

23mH,

C

£

10uF

and

R

2

200%.

[For

L

and

C

measurement,

these

ranges

increase

by

x10

at

120(100)Hz

and

decrease

by

same

factor

at

10kHz].

Section

1

Table

1-2

Table

1-2.

General

Information.

Model

4262A

Measurement

Times

(typical):

For

a

1000

count

measurement

on

a

low

loss

component

on

a

fixed

range:

ESR

(Equivalent

Series

Resistance)

Measurement:

Following

tables

show

ESR

measure-

ment

range

for

capacitors

and

inductors.

3or4

Digit

Display

L

100

1k

10k

2o0rl

3or4

Digit

Dispiay

Digit

Display

10

120

Hz

1

kHz

Test

Frequency

Function

Meas.

Time

iy

€5

.

-

1kHz,

10kHz

C/L

220-260ms

SEE

£

B

oIl

R

120-160ms

=

oy

120(100)Hz

C/L

900ms

Wt

1

10

F

R

700mS

0mf~

100m-

1

E

B

When

autorange

is

selected

the

following

o100

L0mi

100

times

per

range

step

must

be

added

to

2

10

X

|-

10004

10

the

above

times:

3

S

10

1004

10005

1kHz,

10kHz

45ms/180ms

g

120(100)Hz

150ms/670ms

§

10k

100

Lyl

g

10g

When

U-CL

is

displayed,

the

faster

ranging

time

is

selected.

171

S

P

S

Reading

Rate:

B

10

Internal

-

Approx.

30ms

between

end

of

Measurement

Range

of

ESR

(2)

measurement

and

start

of

gg

g2

»

£

External

-

Measurement

cycle

is

initiated

g‘?‘

= £ E

! .

1~

10~

100

by

external

trigger

input.

. .

00mf

1

F

10

High

D

Factor

Accuracies:

)

"

Typical

g

lomp

100f

2

. .

G

(22,

0n

10.00

range)

Sl

a1

Circuit

Mode

Accuracy

)

R

e

5%

+(2+1000/Cx)

3

&

10uf

1004f

o~

HW—o

5

%

+

(5

-+

Cx/500)

lpf

0wk

LYo

5

%

+

(5

+

Lx/500)

¢

R

T

10

oFTE

WV

5

%

+(3+200/Lx)

Measurement

Range

of

ESR

(2)

MEASURING

TIME

(ms)

---

When

LCR

RANGE

is

set

to

MANUAL

---

1000

Cp,Ls

000

l

—T

G5,

Lp

ao0

________.——"‘::_—-—————""—"—'

|

Rs

700

—

Re

T

Rp

E

600

¥

s00

g

400

i

@

300

—

’

2

T

R

e

——

R

100

000

2000 3000

4000

(

Counts)

Sum

of

Counts

on

LCR

ond

DISSIPATION

FACTOR

Displays

Model

4262A

1kHz

and

10kHz

and

about

900

milliseconds

at

120Hz.

The

wide

range

capability

of

the

4262A

enables

a

measurement

range

from

small

capaci-

tances

such

as

mica

capacitors

and

the

para-

sitic

capacitance

of

a

semiconductor

device

through

high

capacitances

such

as

the

measurement

of

electrolytic

capacitors

to

be

covered.

A

wide

range

of

inductance

measurements

from

the

in-

ductance

of

a

high

frequency

transformer

to

that

of

a

power

transformer

can

be

measured.

The

wide

resistance

range

permits

the

measurement

of

wire-

wound

resistors

through

the

measurement

of

solid

resistors.

In

parallel

capacitance

measurements,

either

a

test

signal

level

of

1Vrms,

or

50mVrms

can

be

selected.

1-7.

The

4262A

has

the

capability

of

making

capacitance,

inductance,

and

resistance

deviation

measurements.

This

function

is

enabled

by

pushing

the

A

LCR

switch

to

display

the

deviation

of

a

re-

ference

value.

When

the

A

LCR

switch

is

depressed

the

reference

value

is

obtained

and

memorized

from

the

preceding

measurement.

The

practi-

cal

use

of

this

feature

is

evident

when

it

is

desired

to

make

a

measurement

on

a

variable

capacitor:

First,

the

minimum

value

is

measured,

then

the

A

LCR

button

is

pushed,

Minimum

to

maximum

capa-

citance

is

now

displayed

as

the

capacitor

is

rotated

through

its

range.

For

parallel

capacitance

meas-

urements,

test

signal

levels

of

either

1Vrms

or

50mVrms

may

be

selected.

Other

versatile

4262A

capabilities

and

features

are,

for

example,

the

use

of

internal

and

external

dc

bias

voltages,

LC

zero

adjustment,

and

options

providing

BCD

output,

HP-IB

interfacing

capability,

or

a

comparator

func-

tion.

1-8.

SPECIFICATIONS.

1-9.

Complete

specifications

of

the

Model

4262A

LCR

Meter

are

given

in

Table

1-1.

These

specifi-

cations

are

the

performance

standards

or

limits

against

which

the

instrument

is

tested.

The

test

procedures

for

the

specifications

are

covered

in

Section

IV

Performance

Tests.

Table

1-2

lists

gen-

Figure

1-2.

Serial

Number

Plate.

Section

I

Paragraphs

1-7 to

1-16

eral

information.

General

information

is

not

speci-

fications

but

is

typical

characteristics

included

as

additional

information

for

the

operator.

When

the

4262A

LCR

Meter

is

shipped

from

the

factory,

it

meets

the

specifications

listed

in

Table

1-1.

1-10.

SAFETY

CONSIDERATIONS.

1-11.

The

Model

4262A

LCR

Meter

has

been

designed

to

conform

to

the

safety

requirements

of

an

IEC

(International

Electromechanical

Com-

mittee)

Safety

Class

I

instrument

and

is

shipped

from

the

factory

in

a

safe

condition.

1-12.

This

operating

and

service

manual

contains

information,

cautions,

and

warnings

which

must

be

followed

by the

user

to

ensure

safe

operation

and

to

maintain

the

instrument

in

a

safe

condition.

1-13.

INSTRUMENTS

COVERED

BY

MANUAL.

1-14.

Hewlett-Packard

uses

a

two-section

nine

character

serial

number

which

is

marked

on

the

se-

rial

number

plate

(Figure

1-2)

attached

to

the

in-

strument

rear

panel.

The

first

four

digits

and

the

letter

are

the

serial

prefix

and

the

last

five

digits

are

the

suffix.

The

letter

placed

between

the

two

sec-

tions

identifies

country

where

instrument

was

manufactured.

The

prefix

is

the

same

for

all

iden-

tical

instruments;

it

changes

only

when

a

change

is

made

to

the

instrument.

The

suffix,

however,

is

as-

signed

sequentially

and

is

different

for

each

in-

strument.

The

contents

of

this

manual

apply

to

in-

struments

with

the

serial

number

prefix(es)

listed

under

SERIAL

NUMBERS

on

the

title

page.

1-15.

An

instrument

manufactured

after

the

printing

of

this

manual

may

have

a

serial

number

prefix

that

is

not

listed

on

the

title

page.

This

un-

listed

serial

number

prefix

indicates

the

instrument

is

different

from

those

described

in

this

manual.

The

manual

for

this

new

instrument

may

be

ac-

companied

by

a

yellow

Manual

Changes

supple-

ment

or

have

a

different

manual

part

number.

This

supplement

contains

‘“change

information”

that

explains

how

to

adapt

the

manual

to

the

newer

instrument.

1-16.

In

addition

to

change

information,

the

supplement

may

contain

information

for

correct-

ing

errors

(called

Errata)

in

the

manual.

To

keep

this

manual

as

current

and

accurate

as

possible,

Hewlett-Packard

recommends

that

you

periodically

request

the

latest

Manual

Changes

supplement.

The

supplement

for

this

manual

is

identified

with

this

manual’s

print

date

and

part

number,

both

of

which

appear

on

the

manual’s

title

page.

Com-

plimentary

copies

of

the

supplement

are

available

from

Hewlett-Packard.

If

the

serial

prefix

or

number

of

an

instrument

is

lower

than

that

on

title

page

of

this

manual,

see

Section

VII

Manual

Changes.

1-7

HP 4262A Service manual

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