HP 3476B Service and user manual

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OPERATING

AND

SERVICE

MANUAL

DIGITAL

MULTIMETER

34768

w....-

Flio-

~~

-

HEWLETT

PACKARD

"

;..

...

...

....

CD

'"

r----------

Flin-

~~

HEWLETT

PACKARD

OPERATING

AND

MODEL

SERVICE

34768

MANUAL

DIGITAL MULTIMETER

For Instrument Serial Numbers

Any changes madeininstruments manufactured after this print-

ing will be found in a "Manual Changes" supplement supplied

Be

with this manual.
exists for this manual, for any changes which apply to your
instrument and record these changesinthe manual.

suretoexamine this supplement,ifone

WARNING

I652A07250

I

and Greater

To

help

minimize
hazards,donot
moisture.

©Copyright Hewlett-Packard Company 1976

P.O.

Box 301, Loveland, Colorado 80537 U.S.A.

the

possibilityofelectrical

expose

this

instrumenttorainorexcess

Manual Part No. 03476-90006

Microfiche Part No. 03476-90056

fireorshock

Printed: November 1977

r------------~~

FliOW

HEWLETT

PACKARD

CERTIFICATION.

Hewlett-Packard Company certifies that thisproduct metits publishedspecifications at the timeofshipmentfrom the

are

factory. Hewlett-Packard further certifies that its calibration measurements

traceable to the United States
tional BureauofStandards, to the extent allowed by the Bureau's calibration facility, and to the calibration facilities
of

other International Standards Organization members.

WARRANTY

is

This Hewlett-Packard product

from date
shall be for the specified period) . During the warranty period, Hewlett-Packard Company will, at its option, either
repair

For warranty service
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,

of

shipment [,except that in the caseofcertain components listed in Section Iofthis manual, the warranty

or

replace products which prove to be defective.

or

repair, this product must be returned to a service facility designated by -hp-. Buyer shall

warranted against defects in material and workmanship for a periodofone year

and

taxes for products returned to -hp- from another country.

Na-

Hewlett-Packard warrants that its software and firmware designated by -hp- for use with

programming instructions when properly installed on that instrument. Hewlett-Packard does not warrant that the

operation

The foregoing warranty shall not apply to defects resulting from improper
Buyer-supplied software or interfacing, unauthorized modification or misuse, operation outside
specifications for the product,

NO

DISCLAIMS

PURPOSE.

THE

PACKARD
QUENTIAL DAMAGES,

of

the instrument,orsoftware,orfirmware will be uninterrupted or error free.

OF

LIMITATION

or

improper site preparation or maintenance.

OTHER

REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES. HEWLETT-

Product

for
For

WARRANTY

THE

IMPLIED

SHALL

NOTBELIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL,ORCONSE-

maintenance

IS

WARRANTIESOFMERCHANTABILITY AND FITNESS FOR A

WHETHER

agreements

Hewlett-Packard products.

any

assistance,

contact

EXPRESSED

BASED ON CONTRACT, TORT, OR ANY

your

OR

EXCLUSIVE REMEDIES

ASSISTANCE

and

other

nearest

WARRANTY

IMPLIED.

customer

HEWLETT-PACKARD

assistance agreements are available

Hewlett-Packard

or

an

instrument will execute its

inadequate maintenancebyBuyer,

of

the environmental

SPECIFICALLY

PARTICULAR

OTHER

Sales

LEGAL THEORY.

and

Service

Office.

Addresses are provided at the backofthis manual.

10/1/79

iii

7-2

7-1
7-1
7-1

6-1

6-1
6-1
6-1
6-1

5-6
5-6

5-6
5-6
5-6
5-6
5-6

5-1
5-1
5-1
5,1
5-1
5-1

_.

Page

_ 5-6

..

..

Page

5-7/5-8

5-7/5-8

5-7/5-8

_

_ 5-7/5-8

Zero

Adjustment

Test

_

AND

CIRCUIT

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

Battery

Fuse

Power

Adjustment

Gain

and

Adjustment

Adjustment

Adjustment

Adjustment

Adjustment

Rejection Test 5-3
Rejection Test 5-3

Accuracy Test 5-3

Accuracy Test

Accuracy

Removal _ 7-2

Printed

Circuit Board

Exchange

Diagrams 7-2

Troubleshooting

Introduction

Parts

Parts

Information

Introduction

PARTS.

Replacement

and

Line

Options

the

(.I 1 V range) 5-7/5-8

AC

High

Frequency

Adjustment

AC

Converter
Adjustment
Frequency

+

DC

Volt

Gain
Amplifier Zero

Adjustment

Procedure

Tests

Integrator
Input

Amplifier Zero

Substrate
Power

Supply

Adjustment
Common-Mode
Common-Mode

AC

Ammeter

Ohms

Accuracy Test 5-2

Ammeter
Voltmeter

Introduction

7-14.

7-12. Printed Circuit Assembly
7-10.

Schematic

7-3. Preliminary
7-1.

DIAGRAMS _

TROUBLESHOOTING

VII.
Section Page

Proprietary

6-10.
6-8. Parts Changes : . 6-I
6-6. Non-Listed

64.

Ordering

6-1.

V!. REPLACEABLE
Section

5-36. AC Line

5-33. Changing

5-32.

I.

5-3
5-30. Ohms
5-29. Clock
5-28. - DC Volt Gain
5-27.
5-25.
5-23.
5-22.
5-21.
5-19.
5-17. DC
5-15. AC
5-14.
5-12. AC Voltage Accuracy Test 5-2
5-10.
5-8. DC
5-6. DC
5-5.

Performance

5-3. Test EqUipment Required
5-1.

V. MAINTENANCE
Section

3-3

3-3
3-3
3-3
3-3

3-2
3-1
3-1
3-1
3-1
3-1
3-1
3-1

1-1
1-1
1-1
1-1

..

..

Page

Page

.4-1/4-2

.4-1/4-2
.4-1/4-2

2-1/2-2
2-1/2-2
2-1/2-2

2-1/2-2

1-3/14

1-3/1-4
1-3/14

4-1)

Fuse

Junction

. . . . . . . . . . . . . . . 3-3

Battery

Fuses 3-3

Indication _

Time

the

Battery

Measurements 3-2
Measurements 3-2

Switch _ _

and

Receptacles 2-1/2-2

Shipment

Requirements

_ 2-1/2-2

Manual

and

Measurements.

_

Description (Figure

Introduction

OF

OPERATION

Semiconductor

Replacement.

and

Input

Protection

Battery

Operating

Battery

Operation

DC

Current

AC

Current

DC Voltage Measurements _
AC Voltage Measurements
Auto/Hold

Operation

Introduction

INSTRUCTIONS

Power

Cords

Environmental
Power

Requirements

Introduction

Options

Identification

Instrument

Specifications...................

Introduction

INFORMATION

4-3. Simplified Block Diagram

4-1.

IV.

THEORY

Section Page

3-37.

3-35. AC Line
3-33.
3-31. Low
3-29.
3-27. Recharging
3-26.
3-23. Resistance Measurements 3-2
3-20.
3-17.
3-14.
3-11.
3-8.
3-6. Overload/Overrange Indication
3-5.
3-3. Turn-On
3-1.

lII.

OPERATING

Section

2-13.
2-9. Repackaging for
2-7.
2-5.
2-3. Initial Inspection 2-1/2-2
2-1.

I!.

INSTALLATION

Section Page

1-14. Safety Considerations
1-12. Accessories 1-3/1-4
1-9.

1-7.
1-5.

1-3. Description . . . . . . . . . . . . . . . . . . . . .

1-1.

I.

GENERAL

Section

of

Contents

Table

OF

CONTENTS

TABLE

3476B

Model

TableofContents

LISTOFTABLES

Model

3476B

Table

I-I.

Specifications

1-2. General

1-3.

1-4. Accessories
5-1.
5-2. DC
5-3. DC

5-4.

5-5.

5-6.
6-1.
6-2.
6-3.

Information

Options

Required

Voltmeter
Ammeter

Ohms

Accuracy

AC

Voltage Accuracy

AC

Ammeter
Standard
Code

ListofManufacturers

Replaceable

_ 1-3/1-4

..

_ _ 1-3/1-4

Test

Equipment
Accuracy

Accuracy

Test 5-2

Accuracy

Abbreviations

Parts 6-3

Test.

Test

Test

Test

Page

I-I

, 1-2

5-0
5-1
5-2

5-3
5-3
6-2
6-2

LISTOFILLUSTRATIONS

R~re

2-1. Plug Caps 2-1/2-2

I.

Overload Indica

3­3-2.

Multimeter

3-3.

AC
3-4. DC Voltage
3-5. AC
3-6. DC
3-7. Resistance
3-8. Low
3-9.
4-1. Simplified Block Diagram _
5-1. DC
5-2.
5-3.
5-4.
5-5.

7-1.
7-2.

Voltage Measurement

Current
Current

Battery

LocationofControls

Ammeter

Ohms

Accuracy

AC

Ammeter
Common-Mode
Adjustment
Multimeter

Power

Supply

tion

Autoranging

Measurement
Measurement
Measurement 3-2

Measurement

Indication

and

Connectors

Accuracy

Accuracy Test 5-3

Locator.

Schematic

Test

Test

Rejection

Test

Diagram 7-5/7-6

_ 3-2

_ 3-3

~~

3-1
3-1
3-1
3-2

3-2

3-4

.4-1/4-2

5-2

5-2

5-4

5-9/5-10

7-7/7-8

iv

A

treme

caution

voltages,

Dangerous

ex·

Use

in

this

instrument.

are

present

and

adjusting.

death,

testing,

of

causing

when

handling,
capable

IWARNING'

this

manual.

Warnings,

throughout

procedures

be

followed.

dangerous

must

potentially

in

the

warnings

precede

below,

contained

the

example

Instructions

such

as

per-

first

with

any

are main-

Hewlett-

or

circuits

even

internal

of

features

to

a

parts

of

rendering

discharge

exist

components

and

Operation

safety

substitute

and

may

not

replace

replacement

hazard.

fumes.

that
the

instrument

not

install

person, capable

power

voltages

safety

gases or

to

ensure

Return

do

another

disconnect

dangerous

personnel. Do

Component

a

definite

instrument.

hazards,

unless

always

conditions,

covers.

constitutes

of

flammable

for

service and repair

to

the

additional

INSTRUMENT

adjustment

avoid injuries,

certain

maintenance

instrument

qualified

environment

in

the

presence

ATMOSPHERE

Office

introducing

OR

MODIFY

ALONE

To

Under

by

not

remove

an

WARNINGS

modification

of

danger

PARTS

is present.

internal service or

OR

ADJUST

them.

connected.

be made

must

LIVE

CIRCUITS

in

such

the

instrument

IN

AN

EXPLOSIVE

PROCEDURE

any

unauthorized

of

the

SUBSTITUTE

resuscitation,

attempt

SERVICE

touching

cable removed.

cable

must

power

personnel

AWAY

FROM

instrument

operate

OPERATE

DANGEROUS

tained.
Packard Sales and Service
form
Because

DO

NOT

aid and
Do

not

DO

NOT

before
the

power

with
adjustments
Operating

KEEP

electrical
Do

not

DO

NOT

(IEC)

standards.

plug

of

the

to

an

with

a

The

power

to

an elec-

no

assumes

violates

repair

of

this

mating

connected

or used

cable.

1

instrument.

Company

in

this

manual

and

service,

safety

jack

and

firmly

outlet

ac

power

be

connected

a

Safety

Class

elsewhere

power

wire

(green)

electrical

must

is

cabinet

This

Hewlett·Packard

warnings

phases

of

operation,

Commission

The

outlet.

grounding

three-contact

a

three-conductor

requirements.

of

the

instrument.

with

specific

during

all

the

with

chassis and

these
use
or

power

with
approved

observed

SUMMARY

PACKARD
HEWLETT

Electrotechnical

at

the

into

an

instrument

comply

with

and

intended

precautions

must

be

SAFETY

~~

FliOW

adapter

is equipped

the

to

these

International

ground)

(safety

be plugged

instrument

hazard,

failure

manufacture,

comply

with

safety

precautions

ground

to

two-contact

either

The

shock

THE

INSTRUMENT

the

customer's

of

design,

Failure

to

general

for

cable

meet

power
electrical
three-contact
cable

must

trical

ground.

To

minimize

GROUND

liability
safety

standards

instrument.
The

following

SAFETY

SYMBOLS

...L

-

m

General

DefinitionsofSafety

&

~

OR@

W

OR.l.

Symbols

Instruction manual symbol: the product will be marked with this
symbol wheri
manualinorder

Indicates dangerous voltage (terminals fed from the interior by
voltage exceeding 1000 volts must be so marked).

Protective
shock in case
dicate the terminal which must be connected to
operating equipment.

Low-noise
signal

common,
shock in case
be connected to ground in the manner described in the installation
(operating) manual,

Frame
the equipment which normally includes all exposed metal struc­tures.

itisnecessary for the user to refer to the instruction

to protect against damage to the instrument.

conductor

of

a fault. Used with field wiring terminals to in-

or

noiseless, clean

as well as providing protection against electrical

of

a fault. A terminal marked with this symbol must

or

chassis terminal. A connection to the frame (chassis)

UsedOnEquipmentorIn

terminal.

and

before operating the equipment.

For

ground

protection against electrical

(earth) terminal. Used for a

Manuals.

ground

before

of

WARNING

I

NOTE:

Alternating current (power line).

Direct current (power line).

or

Alternating

The

WARNING

cedure, practice, conditionorthe like, which, if not correctly per-

I

I formed

The

CAUTION
operating procedure, practice, condition
correctly performed
destructionofpartorallofthe product.

The

NOTE
to procedure, practice, conditionorthe like, whichisessential
highlight.

direct current (power line).

sign denotes a hazard. It calls

or

adhered to, could result in injuryordeathtopersonnel.

sign denotes a hazard.Itcalls

or

adhered to, could result in damage to

sign denotes

important

information.Itcalls

attention

attention

or

the like, which,if not

to a pro-

attention

to an

or

to

I-I

Protection:
Capacitance: <
Resistance:

rms

rms

Ranges*

Protection:
Resistance:

V,

1100

V,

11

Ranges

Temperature
I

nput

Input
Input
Common

*Ranges usable

0.11 V rms

1.1 V

0.11 V

1.1 V rms

Accuracy

Ranges: 0.11 V rms, 1.1 V rms,

AC

VOLTMETER

Temperature

nput

I
Input

Common

110

1.1

0.11 V

Accuracy
Ranges: ± 0.11

DC

VOLTMETER

of

range)

of

reading

of

range)

of

reading

10

kHz

of

range)

reading

of

range)

reading

10

kHz

of

range)

of

range)

of

rangel

of

to

of

to

Cycle)

+ 1.1%

+ 1.1 %

kHz

+ 1.0%

+ 1.0%

kHz

± (18.2%

± (8.2%

5

± (18%

± (8%

5

Cycle)

Cyclel

Maximum)

reading +0.1%
reading + 0.1 %
reading + 0.2%

Calibration

Accuracy

Hz

of

range)

of

reading

of

range)

of

reading

5

kHz

of

range)

reading

of

range)

reading

5

kHz

of
of
of

Inputl

60

to

of

of

to

(l·Year

of

range)tC

50 Hz and

+ 0.7%

± (5.2%

+

0.7%

± (3.2%

2

kHz

Calibration

Accuracy

+ 0.6%

± (5%

+ 0.6%

± (3%

2

kHz

Calibration

Accuracy

1100

V rms (707 V rms

of

range)/oC

kfl

unbalanced)

V

Maximum

at

(l·Year

(gO·Day

Hz

(1

of

range) ± (0.6%

of

range) ± (0.5%

range) ± (0.5%

0.05%

80

dB

range)
reading

range)
reading

2

kHz

range)

range)
reading

2

kHz

V rms,

0.02%

60

of

Cycle)

(1000

of
of

of
of

to

of

of

reading

of
of

to

110

Hz,

V

reading +

Hz

Hz

reading +

50

1100

0.6%

at

of

balanced) >

+ 0.7%

± (2.2%

+ 0.5%

± (1.7%

45

+

± (2%

+ 0.4%

± (1.5%

45

11

V rms,

of

dB

of

reading +0.1%

of

reading + 0.1 %

of

reading + .2%

Calibration

Accuracy

110

V,

± (0.05%

continuous

30

pF

Mfl

±

5%

(1

kfl

to

full

scale.

rms

± (0.05%

1000

V

(Continuous)

Mfl

± 5%

>

100

± (0.3%

(gO·Day

V,

11

V,

< 707 rms

10

0.03

V

V rms

to

30°C):

<

10

to

30°C):

V,

1.1

Coefficient:

Mode

Reiection:

from

to

1100

to

1100

(20°C

Coefficient:

Mode

Rejection:

V ± (0.4%

V ± (0.3%

(20°C

Table 1-1. Specifications.

and

dc

and

ohms. A HOLD

which

Multimeter

and

function

measures ac

is a 3 digit, five limits

is

to

the

of

will be

Standards

changes, design

can

be

tested. Any changes

o(

standards

performance

are listed in Table

National Bureau

due

to

manufacturing

Multimeter

are

the

the

Multimeter

which the

or traceability

dc

in these specifica"tions

to

I-I.

These specifications

1-6. Specifications for

current,
instrument
3476B

autoranging

The -hp- Model

DESCRIPTION.

yoltage, ac
function,

14.

'-3.

'-5.

SPECIFICATIONS.

specifications,

Multimeter. Included is

identification,

3476B

Multimeter.

readings per

this manual,
three

without

provided

to

as
of

remainder

will be referred

the

is

approximately

measurements

repeated

Multimeter

Throughout

user

to

make

second.

the

changing ranges. The sample rate

to

enable

the

3476B

instru­instru-

INFORMATION

I

SECTION

accessory infor-

about

an

concerning

information

information

GENERAL

option

and

and safety considerations.

Section I

mation,
ment

and manual

ment

description,

the -hp- Model
1-2. This section contains general

'-1.

INTRODUCTION.

Model

3476B

Section I

DC

AMMETER

Ranges: ± 0.11A.1.1 A (1.1 A
Accuracy

(20°Cto30°C):

maximum

Table 1-1. Specifications (Cont'd).

input)

Model

347613

Ranges

±O.llA,l.lA

Impedance: 1 - 1.5
Protection:
Temperature

AC

AMMETER

Ranges: 0.11 A rms,

Accuracy

1.1

0.11

• Ranges usable

Impedance: 1 - 1.5
Protection:
Temperature

OHMMETER

Ranges: 1.1
Accuracy:

110K,1100

Open
I

nput

Temperature

Ranges'

Arms

Arms

Ranges

11000

1.1

K,11

Circuit
Voltage

30Vto

(20°Cto30°C):

K,

Accuracy

(90-Day

Calibration

±(0.8%ofreading

0.2%ofrange)

ohm

1.5

A fuseto250

Coefficient:

± (2%ofreading

+ 0.4%

± (2.5%ofreading

+ 0.6%

from

1.5 A fuseto250
Coefficient:±(0.05ofreading + 0.05%ofrange)/oC

kf!,11kf!,

(20°Cto30°C)

K

constant

± (0.05%ofreading + 0.02%ofrange)/oC

1.1

Arms

(90-Day

45Hzto2kHz

of

range)

of

range) + 0.6%ofrange)

0.03tofull

ohm

constant

110

kf!,

Accuracy

(90-Day

Calibration

± (0.3%ofreading

+0.1 %

K

250

± (0.5%ofreadi

+ 0.1%

Voltage: < 4 V

Protection:<30

V rms requires replacementofinput

Coefficient:

± 10.05%ofreading + 0.02%ofrange)/oC

Cycle)

V(>250Vwill

(1.1

rmsmaximum

Accuracy
Calibration

2

kHzto5

± 13.5%

+ 0.6%

± (5.5%

scale.

V(>250Vwill

1100

kf!,

11000

Cycle)

of

range)

ng

of

range

V rms

continuous,noeffect;

damage

Cycle)

of
of

of

damage

Accuracy

(l-Year

Calibration

± (1.0%ofreading

0.2%ofrange)

the

input)

kHz

reading
range)

reading

the

instrument)

kf!

Accuracy

(1-Year

Calibration

± (0.5%ofreading

+ 0.1%

± (0.7%ofreading

+ 0.1%'of range)

fuse; >

Cycle)

instrument)

(1-Year

45Hzto2kHz

± (2.2%ofreading

+ 0.5%

of

of

± (2.7%

+ 0.7%

of

Cycle)

of

range)

250Vwill

damage

range)

reading
range)

Accuracy

Calibration

2

± 13.7%ofreading

± (5.7%ofreading

instrument.

Cycle)

kHzto5

+ 0.7%

+ 0.7%

of

of

kHz

rangel

range)

1-2

Ranging:
Sample Rate:
Operating

Power:

AutomaticorHold

Environmental
Temperature
Humidity:

AC

line, < 6

Standard,
Option
Option
Option
Option

approximately

conditions:

range:

< 95% RH

VA

at:

104-127V,

001,

86-106V,54-66

002,

86-106V,48-54

003,

190-230V,48-54

004,

208-250V,48-54

Table 1-2, General Information,

Mode
3 samples per second

OOCto40°C

54-66

Hz

Hz
Hz

Hz
Hz

8attery

Pack: rechargeable

Typical

Operating

8

hoursat25°C

Battery

charging
instrument
be

Weight:
Shipping

Dimensions: 5.84

(6.6 in.) wide,

turned

maintained

0.97kg(2 lb. 2 oz.)
Weight:

Nickel

Cadmium

time

using

fully

charged batteries:

time:14hoursat25°C

off.

Battery

in.)

high,

in.)

charge

on.

16.8

deep

with

instrument

1.79kg(3Ib.15oz.)
cm

(2.3

20.6cm(8.1

with
will

cm

1-3/1-4

operating

ca

utions

(down

Max.
Max.
Max.
Max.
Max.

the operat-

mA
mA
mA
mA
mA

the
of

MHz)

MHz

the Multimeter

30
70
70
60

500

VA,
VA,
VA,
VA,

Kit

700

to

with

these instructions must be

to

hazardous operating and

Case

and

100

kHz

Description

Hz, 6 VA,30
Hz, 6
Hz, 6
Hz, 6
Hz, 6

Description

10kHz

48-54

Soft

Carryi ng

Universal Test Lead

1251-4242

3 dB

at

R F Probe,

Two

Operating and Service Manuals

208-150,

190-230,48-54
86-106,48-54
86·106,54-66

104·127,54-66

of

the

instrument,

11

068A

11067A

11

096A

11096A

Number

SAFETY

Model

Model

Adapter

Model

Model

CONSIDERATIONS.

Table 1-4. Accessories.

ACCESSORIES.

910
004
003
002
001

Table 1-3. Options.

followed.
condition
ing and maintenance personnel and retain
maintenance conditions. To ensure the safety
and warnings alerting the user
1-15. This Operating and Service Manual contains

1-14.

Accessory

are listed in Table 1-4.
1-13. The accessories available for use

1-12.

Standard

Option

manual.

this

in

of

Section V

Frequency Adjustment

label,

it will be necessary to perform the Clock

quency other than the one indicated on the

If

is

fre-

to be operatedat a line

NOTE

to

indicate
a different line voltage,
is

wired.

available for

accomodate

instrument

contains a label identifying

the

options

the

lists

line

jumper

the

Multi-

the

new config-

the

the

If

correspondence with Hewlett-Packard

to

the manual.

all times

the change sheet supplied

differs from

with

at

instrument

the prefix and

MANUAL

is

provided to describe general

supplied

the

is

up-to-date

which

between

AND

with

the

one

on the title

If

the serial

by

means

of

a

was

manufactured.

the

suffix identi-

within

The

instrument

instruments. The

number.

of

IDENTIFICATION.

the instrument

instrument

1-3

All

this manual, refer
of

your

instrument

is

kept

in

country

in Table 1-2

by

an errata or change sheet. These specifications

uration.
the label must also be changed

wires are changed to
voltage for which

The

1-11.

meter.

1-10. Table

1-9.

OPTIONS.

should include the complete serial number.
the manual.
page

of

number
change sheet which
The

manual

fies

the

the

series. A letter

last section (suffix) identifies a particular
first section (prefix) identifies a series
1-8. Hewlett-Packard uses a two-section serial

1-7.

INSTRUMENT

operating characteristics.
information
supersede any prior published specifications. Supplemental
covered

Model

Section I

3476B

2-1/2-2

Figure 2-1. Plug Caps.

·UL

LISTED

FOR

USE

IN THE UNITED STATES

:#~

25V_6A'

8120-1521

~

STO-B-4195

you have any questions, contact your nearest -hp-

if

is

to

if

it

be used; 2·12

or moisture.

rain

FOR

SHIPMENT.

the original container

the

instrument for shipment. Refer to Para-

6A'

250V -

~

OF

AMERICA

I~~

""

8120-0698

(:)Q.

prevent potential electrical or fire hazard,

WARNING

is

less than 95%.

of

O°C

to

40°C (32°F to

to

+30°C (+68°F to +86°F). The instru-

REOUIREMENTS.

to

Section V for Power Requirement

is

incompatible with the available

REOUIREMENTS.

of

this manual.

If

there

is

damage or deficiency,

was

carefully inspected

INSPECTION.

+20°C

when the operating temperature

the instrument

V.

confirm this, the instrument should be inspected

104;

both

I

of

the instrument by refer-

It

should be free

ment (CEE 22).

of

Electrical Equip-

be

provided. The instrument ac

if

is

re-

of

used, proceed

prOVided

to

be

with each

instrument

as

model number and

a different power cord set

illustrates the plug cap configurations that

AND

RECEPTACLES.

in heavy paper or plastic before plac-

is

not

is

not available, one can be pur-

by

is

the part number for the power cord set equipped

to

provide ac power to the Multirneter. The

2-1

CORDS

inst~ument

original container

serial

number.

of

the instrument. In any correspondence,

Commission on Rules for the Approval

meet the safety specifications set by the International

power input receptacle and cord set appliance coupler
a replacement cord will
quired, notify the nearest -hp- Sales and Service Office and
instrument. However,
appropriate power cord should be
with the appropriate mating plug for that receptacle. The
drawing

-hp- part number shown directly below each plug cap
are available

2-14. Figure

2-13.

POWER

bands.
ton

or wooden box and seal with strong tape or metal

c.

Place instrument and inner container in a heavy car-

and protect panel face with cardboard strips.

b. Place packing material around all sides

ing in an inner container.

a.

Wrap

follows:
2-12.

If

chased from your nearest -hp- Sales and Service Office.
bands. If original container
ate packing material and seal well with strong tape or metal
2-11. Place instrument in original container with appropri-

full
identify the instrument
ber

OF)

and the

is

is

within the

to

the instru-

war-

anyone

see

the

mechani-

of

of

Include the model number and full serial num­the service or repair to be accomplished.
instrument identifyingthe ownerand indicating

of

repair,

tag

to the

attach a

is

to be shipped to Hewlett-

for service or

PacklJrd
If

the instrument

the Multimeter. Included

tions).
Sales and Service Office (See Appendix A for office loca­is

not.

If

graph

2-11

repackaging
2-10. The following paragraphs contain a general guide for

2-9.

REPACKAGING

do not expose equipment to

To

relative humidity
within the range
ment can be operated where the ambient temperature

of

range
Table

1-1

2-8. The Multimeter will meet the specifications listed in

2-7.

ENVIRONMENTAL

Modification instructions.
power source, refer
ment.

If

ing to the power requirement label attached
matches the power requirement
the instrument to ac power, verify that the ac power source
the ac power sources listed in Table 1-3. Before connecting
2-6. The Multimeter can be operated from

2-5.

POWER

ranty inside the front
Section
should be tested using the performance tests outlined in
for physical damage in transit. Electrical performance
ceipt.

To

mars or scratches and in perfect electrical order upon re­cally and electrically before shipment.
2-4. This instrument

2-3.

INITIAL

for repackaging the instrument for shipment.
requirements, environmental information, and instructions
are initial inspection procedures, power and grounding
the installation and shipping
2-2. This section contains information and instructions for

2-1.

NOTE

INTRODUCTION.

INSTALLATION

II

II

Section

SECTION

Model 3476B

3-1

AC

Voltage Measurement.

SOURCE
AC

3476-

8-4453

~~~

as

1.5A

FUSE

MAX

0

A

the

voltage under test

~x

500V

MA~

~I.IA______.,

COM

n (HI)

~)

ac

input voltage must

as

when the switch was depressed.

reo

~

(IN)

as

follows:

exceed

not

the

Multimeter will

Figure 3-3.

rv

32""

FU

E

~

,--.lkV-----.,

Vfl

(LOW) connectors to

AMPS

(A) AND kn (OUT)

AUTO HOLD AUTO (OUT)
VOLTS (V) _ (IN)
DC/

AC

(:7:

707 Vrms.

circuitry, the
To

avoid possible damage to the Multimeter

AC

Voltage

Measurements.

the

same range

Figure 3-2. Multimeter Autoranging.

COM

shown in Figure 3-3.
and
3-13. Connect test leads from the Multimeter V

3-12. Set the Multimeter front panel controls

3-11.

main in
3-10. In the HOLD position (IN)

similar.

1000V

the

the display decreases belowl 1

Switch.

shows

instrument and press

dc. Autoranging

if

Figure

3-1

ready for use.

the

this manual for power requirement modification

to
the autoranging points for dc voltage measurements from 0

is

called

points
placement. The difference between
numerical autoranging points are irrespective

downrange

if

the display reading increases abovel

is

range

Autoranging mode. In this mode

3-9. In the AUTO position

3-8.

Auto/Hold

OverioadjOverrange condition.

3-7. Figure

3-6.

Overload/Overrange

3-5.

OPERATION.

strument

to

power

instructions. After this verification, connect

of

tion V

incompatible with

label located below the ac receptacle.

of

the Multimeter by referring to the power requirement

that the ac power source matches the power requirements

3-4. Before connecting

3-3.

TURN-ON.

is

Multimeter functions

in

other

autoranging hysteresis. Figure 3-2 shows

the

two autoranging

of

decimal

1110101.

These

II

KJ19~1

and

the

Multimeter will up-

(out),

the

the

is

in

Multimeter

3-1. Overload Indication.

the

display indication during an

Indication.

the

ON

the

proper ac

instrument

button.

If

the

to

ac power, verify

available power source, refer

the

Multimeter

the

The in-

to

Sec-

is

2~

0«

ox

Section III

3476-8-'1581

'2

en

.

ex>

•

to

rain

LEVEL

C;

ex>

.'4.

I

I
I

I

I

~

0

INPUT

.1

..

C;

0
0

• 0

II :

~

I.l-------.l.

'"

I

I

I

I

i

!

I
I

-.

8

z

w

1/

110

1100

dc

the

con-

the

of

INSTRUCTIONS

III

SECTION

I

OPERATING

of

ac and dc voltage, ac and

WARNING

-.

0

en en en

ex>

(Vdc)

g

ex>

.101

.•

I

,4

Q

0

I

Q

'i

or moisture.

do

not

expose the Multimeter or its accessories

To

prevent potential electrical or fire hazard,

I

trols and connectors is given in Figure 3-9.
current, and ohms are discussed. A description
Multimeter. Measurements
3-2. This section contains instructions for operating

3-1.

INTRODUCTION.

Model 3476B

Section III

Model

3476B

3-14.DCVoltage

To

avoid possible damage to the Multimeter

circuitry, the dc input voltage must

1000 V

Measurements.

dc.

not

exceed

3-15. Set the Multimeter front panel controls as follows:

DC/AC

(=

~)

==

(OUT)
VOLTS (V) (IN)
AUTO HOLD AUTO (OUT)
AMP (A) AND

kn

3-16. Connect test leads from the Multimeter V n (HI)
COM

(LOW) connectors to the voltage under testasshown

(OUT)

and

in Figure 3-4.

~

VO

,----:

FU

E

32fn-A

BATTERY

IkV

MAX,-

500V

~x

---.,

COM

,-I./

A-----,

MAX 0

FUSE

1.54

A

~~~

3476-8-4453

Figure 3-5. AC

Current

Measurement.

3-21. Set the Multimeter front panel controlsasfollows:

DC/AC(=-=-=~)

AMPS

(A) (IN)

(OUT)

AUTO HOLD , AUTO (OUT)
VOLTS (V) AND

3·22. Connect test leads from the Multimeter A and

kn

(OUT)

COM

to the current under testasshown in Figure 3-6.

Figure 3-4.DCVoltage Measurement.

3-17.ACCurrent

To

avoid possible damage to the Multimeter,

not

allow the voltage

Measurements.

across

the Amps to

do

COM

input terminals to exceed 250 V at any time.

3-18. Set the Multimeter front panel controlsasfollows:

(=

DC/AC
AMPS

~)

(A) (IN)

~

(IN)

AUTO HOLD AUTO (OUT)
VOLTS (V) AND

3-19. Connect test leads from the Multimeter A and

kn

(OUT)

COM

connectorstothe current under test as shown in Figure 3-5.

3-20.DCCurrent

To

avoid possible

not

allow the voltage across the Amps to

Measurements.

damage

to the Multimeter, do

COM

input terminalstoexceed 250 V at any time.

3-23.

Figure 3-6. DC

Resistance

Measurements.

Current

Measurement.

3-24. Set the Multimeter front panel controls as follows:

kn

(IN)
AUTO HOLD AUTO (OUT)
VOLTS (V) AND
DC/AC(=

3-25. Connect test leads from the Multimeter V
COM

connectors to the resistance under testasshown in

~)

AMP

(A) (OUT)

Either

nand

Figure 3-7.

~

Figure

VO

,----:

Fu

32

i"A

COM

IkV

---.,

,-1

.I

MAX 0

Resistance Measurement.

E

MAX,-

A

v

3·7.

500V

~x

A-----,

FUSE

I.SA

A

~~~

3476-

8-4453

3-2

3-3

to downrange.

This causes the instrument

the

(diode)

.

junction

MEASUREMENTS

terminal and the anode to

ranged to the lowest ohms

current on the higher ohms

Replacement

pushbutton.

COM

the

forward resistance, connect the cath-

down

must be

output

JUNCTION

battery

fuses.

Battery

Fuse

diode to the

34768

and

b. Press the A

nv

terminal.

ode

of

the

a. To measure

procedure:
resistance. This can be easily accomplished by the following
range in order to measure semiconductor

ranges, the
3-38. Due to the low

3-37.

SEMICONOUCTOR

ment

of

ac line and

Line

AC

3-36. Refer to Section V for instruction on the replace-

3-35.

line

met

ac

is

inadvertently left on and

NOTE

•

•

not

•

are

•

voltage.
Connect the Multimeter to the proper

the Multimeter

Figure 3-8. Low Battery Indication.

•

a.

Multimeter:
procedure should be followed before using the

becomes completely discharged, the following

If

during Low Battery Indication.
Multimeter accuracy specifications

NOTE

the Input Panel forward.
as

in

place while sliding

can

be used

a tool to hold the fuses

Multimeter test lead banana plugs

shown in Figure 3-8. At this

is

indicated when 5 decimal

recharge.

as

condition

battery

to

battery

to allow the
time the Multimeter should be connected to ac line voltage
points appear on the display
3-32. A low

NOTE

3-31.

Low

Battery

is

eight hours.

Indication.

typical operating time
3-30. With the Multimeter

input jacks.
Input

to

in

place and align the

hold fuses

Panel forward

c.

Push fuses firmly into their receptacles and slide the

fully recharged, the

battery

placement in the Input Protection circuit.

are

250

250

Input

rnA

used for

protrude.

by

the following procedure:

3-9,0,

is

protected
is

input

32

a 1.5A

sliding

by

a

by

@ , @ . Replacement

the

protected

re-

of

the

of

these

Panel

as

V fuse.

V fuse

Fuses.

is

fully recharged.

begin battery operation until the

five minutes.

this period,

of

ac

line operation may be

to

fast

charge

for a

insure that the correct fuses
To

avoid possible damage to the Multimeter,

OHMS

Input

Protection

battery

e.

Do

not

resumed.

d.

After

minimum

c.

Allow the Multimeter

b.

Set the POWER switch to CHARGE (out).

the

b. Remove and replace faulty fuse.

a. Slide the Input Panel firmly toward the back

Multimeter until the fuses

fuses is accomplished
shown in Figure
These fuses are located behind
and
3-34. The AMPS input

3-33.

the

line

to

following

ac

the

by

referring

by

sufficient to fully

14 hours.

is

not

by

a trickle charge current.

NOTE

is

accomplished

hours.

of

the Multimeter

the ac power source (line) matches the

the

Battery.

OPERATION.

Time.

the Multimeter ON and the proper

14

specified in Table 1-2, the Multimeter will be fully

that

3-29.

Operating

recharge the Battery in
This charge current
will be maintained

voltage connected, the charge on the battery
With

recharged within

As

c.

(out), connect the ac line voltage.

b. With the Multimeter Power switch set to Charge

ment

modification instructions.

If

it is incompatible, refer to Section V for power require-

power requirement label located below the ac receptacle.
power configuration

a. Verify

procedure:
3-28. Battery recharging

3-27.

Recharging

3-26.

BATTERY

Section III

Model 3476B

Section JJl

Model

3476B

c. Press thekDpushbutton

tance on the display.

and read the forward resis-

the

c.

d.

To

measure the reverse resistanceofa diode, reverse

input

connections to the diode and repeat Steps

3476-8-4421

13

band

OISPL~

Y:

Five

CD

Power ChargelOn

CD

ONorOFF.
sed.

Batteries
nectedtothe
position,

OC/AC
voltageorcurrent
mode

when

VOLTAGE
eitheracordcvoltage measurements.

AMPS

Selector

acordc

kn

Selector

resistance. Display reads in

section,

Switch:

Powerison when

are

being charged wheneveracpower

Multimeter.

the

battery

charge rateismuch

Selector

Switch:

measurements.

the

pushbuttonisdepressed.

Selector

Switch:

Switch:

current

measurements.

Switch:

Selects

NOTE

0)

and

panel

®

7 segment LE 0

Switches

However, in the

Selectsdcoracmode

Selects voltage

Select amps

ohms

kilohms.

Multimeter

the

pushbutton

The

instrumentisin

function

function

readout.

faster.

function

for

are fuses

®

power

is depres-

is con-

CHARGE

for

either

for

for

either

measuring

located

CD

CD

t9'

ac

\.V

t'jQ\

~

IAmpslnputTerminal:usedincOnjUnctionwiththe

@

2AmpslnputprotectionFuse:1.5amPfuselocated

@

3SlidinglnputPanel:lnthefront(left)positionthispanel

@

Figure 3-9. LocationofControls and Connectors.

behind

sliding

RANGE

AUTO/HOLD

ranging

modeorhold

switch

depressed.

VoltslOhmsInput

the

COM

age,orohms.

OhmsInput
the

COM I

acldc amps and

COM

behind

allows
When in
fuses

terminal

Protection

sliding

input

nput

Terminal:

terminal®for

the

sliding

accesstothe

the

back

0)

and ® can

3476-8-4422

Selector
mode.

Terminal:

®

for

measuringacvoltage,dcvolt-

Fuse: 32mAfuse located

panel ® .

Common

ohms

measurements.

measuringacordcamps.

input

panel ® .

three

input

(right)

position

be

removed and replaced.

Switch:

Hold

Used in

terminal

terminals

Select

modeisset

coniunction

for

(Vn,

the

input

automatic

with

behind

ac/dc

volts,

COM,

protection

the

with

A).

3-4

4-1/4-2

3476-8-4402

(nREFI

Figure 4-1. Simplified Block Diagram.

1-----4V

LOGIC GROUND

1----

1----+111

1----+6V

SUPPLY

POWER

I3V

1---..-----+1

T

CONVERTER

DC

TO

DC

5V

SWITCH

POWER

BATTERY

5V

I

1

--.----<cr::

,

CHARGER,

BATTERY

=0--1

by

Amplifier.

ohms

to

the

the

of

INPUT

accomplished
range switching for all five Multimeter functions. This is

Input

4-6.

current

for

4-5. Ohms Reference.

measurements and during
protection
and functional switching. Overload

of

consist
4-4. Signal Conditioning. The signal conditioning block

4-3.

Simplified

descriptions
Multimeter. Included are simplified block diagrams
4-2. This section contains

4-1.

INTRODUCTION.

DC

or

>--+---+-----1

source provides

fuses provide

protection

(Figure

operation

amplifier provides

current

protection

Description

of

FET

switches to select different gain

The

input

The

ohms

ohms

measurements.

terminals, overload

Diagram

of

each block.

the

theory

using

measurements.

Multimeter circuitry during ac

input

Block

the

function

CONVERTER

!---,-'-=-..JV\1\o-<

and

the

AC

input

amps

fuses

4-1).

for

n

dc

AC

- REF

-JVV"v--o

+REF~

drop

the

3476

conditioning circuits to a digital representation

by

Series Regulator.
Battery and Charger circuit, a
4-9. Power Supply. The Power Supply consists

the
input measurement. This digital representation
the
Detector
technique.

Display. The Multimeter uses

4-8. Integrator, Polarity/Zero

voltage
current
equal to

urements. The

sponding
4-7. AC Converter.

led
levels for the

DC

to

DC

Converter and a

of

a

the

across

the

rms value

output

input

B Display.

and

The Integrator coupled with

mode,

the

detector

Logic Controller.

ac

on

the

of

IZera

the
the ac

voltage

meas-

is

viewed

signal from

In

a

dc

the

the

Polarity

Logic Control and

(R45).

converter is

voltage.

is

current

is

an average re-

dual slope integration

shunt

the

switches are control-

the

Detector,

current

ac

input

AC

Converter

FET

the

the

ac voltage and ac

AC Converter

ohm

voltage to

of

in

Logic Controller converts

the

1

input

of

used

The

amplifier. The

OF

OPERATION

IV

Section IV

SECTION

THEORY

3476B

Model

in-

perform

service

so.

in

the

operating

do

not

by

qualified

to

do

shock,

use

contained

electrical

are

for

are

qualified

than

that

avoid

unless

you

other

only.

To

instructions

structions
any

servicing

personnel

These

servicing

I

WARNING

Section V

Instrument

Digital

Mulumeter

DC Standard

Calibrator/High

AC

Voltage

Amplifier

Meter

Calibrator

(Current

Source)

Electronic

PowerSupply

ReSistive Decade

ReSistors

Counter

Table 5-1. Required Test Equipment.

Type

Box

Characteristics

DC

Volts:

Resistance:
Amp:
Volts:

Resistance:

1 AACor

kn.

100knand 1

Mn±0.1%

1V,10V.

.05%

;;;'1

.1V.1 V

.5%

.02%

0.1%

0.01

.05%

Accuracy:

Input

DC
AC
Accuracy:

I

nput

Output:.1mVto1000

Accuracy:

Frequency:45Hzto10

Output:10mVto1000

Accuracy: 0.1 %

Output:

Accuracy:

Frequency:10kHz

Accuracy:

Output:5V.l
Ranges: 10n.100n.1

10

Steps

Accuracy:
10Mn±0.1%

1

300kn± .1%
1kn± .1% -hp- Part
10 K ± .1% -hp· Part

100

V

;;;'10

ranges·

10Mfl

Mn

V

DC

kn.

kHz
V

Mfl

Amp

%

A -hp-

Recommended

·hp-

3465A

-hp-

740B

-hp

745A/746A

-hp-

6920B

-hp-

5300A/5302A

6294A

General

Radio

GR

1433Z

-hp. Part

No.

·hp- Part

No.

-hp· Part

No.
No.
No.

Model

Model

0698-8194
0698-6369

0698-6332

0698-3491
0698-4157

Model 3476B

5-0

5-1

1007

10.06

10.06

1.006

.1006
..

1006

.0103

+

to

+

-

-

to

to
to +

to·
to -

+

9.94

-

9.94

-

.994

+

.0994

-

.0994

-

.0097

Limits

Test

+

1005

+

10.04

-

10.04

1.004

+

.1005
.1005

-

.0103

to

to
to

to·

to
to·
to

+

995

+

9.96

·9.96

-

.996

.0995

..

0995

-

.0097

Day Calibration Cycle 1 Year Calibration Cycle

Voltmeter Accuracy Test.

DC

1100

V

1000

V

+

+10.00V

10.00

V

-

1.00

V

V +

+

.100

-

.100

V

.010

V

90

Output

DC

Standard

V

11

1.1 V -

.11 V -

Range

Table 5-2.

+

993

to

the

DC

on

mA

Adjust the

exceed

A.

900

not

limits listed in Table 5-3.

Be

sure

to

the

DC

Ammeter. The Multimeter should indicate within the

output

of

for an indication

Power Supply

toler-

the

appropriate calibra-

test for

tion cycle.
ances indicated.

c. Check all the ranges listed in Table 5-2 for

c. Set the Multimeter function to DC

terminals and check for a display

day and

DC

bration cycle to be used for
the appropriate table, depending on the

Performance tables

nals.

b. Connect

input

a. Set

5-7. A DC Standard

5-6.

1000

rnA range.

as

shown in Figure 5-1.

of

a Power Supply and a

Test.

Accuracy

b. Set the DC Ammeter to the

a. Connect the equipment

DC

Ammeter

Ammeter.
5-9. This test requires the use

5-8.

the

termi-

count.

COM

and

of

zero ± 1

dc

volts. Short

instrument.

your

to

measure

Test.

Standard to the vn

is

required for this test.

Accuracy

the

DC

Multimeter

the

Voltmeter

cali-

to the Multimeter

damage

1000 Vdc.
circuitry, the dc input voltage must

To

avoid possible

sure

to use

are

included for both 90

1year calibration cycles. Be

NOTE

5-5.

PERFORMANCE

TESTS

TESTS.

PERFORMANCE

for recording the results
1-1. A Performance Test Card
designed

and Adjustment Procedures. The Performance Tests are

5-2. This section

5-1.

INTRODUCTION.

the table may be substituted for a

is

listed in Table 5-1, Recommended

Required.

of

recommended model.

of

in

specifications given

this section

the end

Test Equipment. EqUipment that satisfies the critical

the performance tests.

is

at

to

verify

the

critical specifications listed in Table

adjustment procedures

of

required for the performance tests and

Equipment

Test

Equipment

54.

5-3.

the manual contains Performance Tests

MAINTENANCE

V

Section V

SECTION

3476B

Model

Section V

PERFORMANCE

TESTS

Model

3476B

POWER

hp

SUPPLY

6294A

MULTIMETER

G

Figure 5-1.DCAmmeter Accuracy Test.

Table 5-3.

Range

1.1 A

5-10.

Current

900

Ohms

5-11. A precision resistance decade
the following test.

a. Set the FUNCTION switch to
short between the
should indicate zero

b. Remove the short and connect
shown in Figure 5-2.
boxascloseaspossible to the Multimeter. When checking
the 11,000

kn

earth ground.

DC

mA

Accuracy

It

v/n terminal and

± I count.

Use

range, connect

Ammeter Accuracy Test.

90

Calibration

.891

thru

Day

Limit

.909

1 Year

Calibration

.889

thru

Limit

.911

Test.

box

will be required for

should have an accuracyof.05%.

kn

and connect a

COM.

The Multimeter

the

equipment

large wire and connect

the

COM

the

decade

terminaltoa good

DIGITAL

MULTIMETER

hp

3465A

0=:J

r

3476-8-4414

5-12.ACVoltage

5-13.AnAC
required for this test.

To

avoid possible damage to the Multimeter

circuitry, the

707 Vrms.

a. Set the MultimetertoACV.Connect theACCalibra-

tor

between the

nect

the

as

for the tolerances indicated on all ranges through 110

Calibrator sense leads.

b. Check

Accuracy

Test.

Calibrator and High Voltage Amplifier will be

ac

input voltage must

vn

and

COM

terminals.Besuretocon-

the

ranges and frequencies listed in Table

not

exceed

5-5

V.

c.

Check all ranges listed in Table 5-4 for

indicated.

Use

the

resistance decade

standard resistances.

RESISTANCE

DECADE

BOX

Figure 5-2. Ohms Accuracy Test.

Range

1.1

11
110
1100 1000
11,000

5-2

box

MULTIMETER

hp

3476

C-9U

3476~B~4415

Standard

(kn)

Resistance

100
1

kn

10
100

10.000

the

tolerances

to supply the

c.
tor
check the tolerances indicated for the

Table 5-4. Ohms Accuracy Test.

Test

90

Day

Calibration

n

kn

kn

kn

kn

.098
.994

9.94

99.6
996
9940

thru
thru

thru
thru
thru

t1lrU

.102

1.006

10.06

100.4
1004

10.060

Cycle 1 Year

kn

WARNING

Use

extreme
ranges.
on the high voltage source.
completed, turn
connecting any cables or test

To check the 1100 V range, connect

care

Establish

when checking the following

all

connections before turning

ojf

the high voltage before

I

When

leads.

the tests

are

dis-

theACCalibra-

and High Voltage Amplifier to the Multimeter and

1100

V range.

Limits

(kn)

.098
.992

9.92

99.4
994
9920

Calibration

thru
thru

thru
thru
thru

thru

.102

1.008

10.08

100.6
1006
10,080

Cycle

kn

5-3

the

and

the

and

peak.

to

a I kil-

to

/n

V/n

V

mV

ac line fre-

and

ac line fre-

1.5

V rms.

the

terminal

the

,,;;

10 mV rms.

V rms.

the

terminal

the

± I % resistor are

,,;;

100

.1

%).

to

to

DC V.

test.

counter,

lOa

to

to

AC V.

indicate

to

Hz ±

HI

output

between

Test.

to

output

between

kilohm

output

or

60

frequency

54.

resistor

Rejection

output

frequency

54.

resistor

Hz

AC Calibrator

kilohm

Calibrator

AC Calibrator HI

kilohm

(50

the

AC Calibrator

being used

the

AC Calibrator

the

the

Multimeter FUNCTION

a I

Common-Mode

the

AC Calibrator

being used.

AC

as

shown in Figure

the

the

Multimeter FUNCTION

a 1

f. The Multimeter should

e. Set

d. Set

c.

Connect

b. Set

a.

Connect

± I%resistor are required for this

DC

f. The Multimeter should indicate

e. Set

d. Set the

Connect

c.

b. Set

Connect

a.

quency

Multimeter as shown in Figure

COM Multimeter terminals.

ohm
5-18. An AC Calibrator, an electronic

5-17.

quency

Multimeter

COM Multimeter terminals.

required for this test.
5-16. An AC Calibrator and a 1

the
the
the

~

on

.925

Limit

thru

1 Year

3476

rnA

A.

Adjust

thru

Calibration

~4"6-8-UI:>

,922

Limit

Day

.875

~19~

hp

MULTI METER

900

of

AC

mA range.

indication

to

the

1000

as

shown in Figure 5-3.

90

to

.878

Calibration

AC

Ammeter Accuracy Test.

for an

equipment

mA

900
Current

1.1 A

Range

Table 5-6. AC Ammeter Accuracy Test.

Figure 5-3.

I

""~.,,.~

hp

3465A

DIGITAL MULTIMETER

l

h

G~~

6920B

CALIBRATOR

ACiDC METER

limits listed in Table 5-6.
AC

the

the

Ammeter.

c. Set

b. Set

a.

Connect

Meter Calibrator

The Multimeter should indicate within

output

Multimeter FUNCTION

AC

Ammeter

the

Accuracy

1100

110

1.1

.11

AC

Test.

V

V

11

V 10 V

V 1 V

V .003 V

Range

5-15.

AC

630
669
682

90.5

96.0

97.7

9.05

9.60

9.77
.905

.960

Limits

Common-Mode

to

767

633
672

to

728

685

to

715

90.9

to

109.1

103.7

10.91

10.37

10.19

1.091

1.019

Test

to)
to

101.9
to

to
to

to
to

1.037
to

to

.0129

to

.1057

10

.0112

to

.1022

to

.0108

to

.0037

Day

96.3

98.0

9.09

9.63

9.80
.909

.963
.980

.0727to.1073

.0071
.0943
.0088
.0978
.0091
.0023

90

TESTS

kHz

kHz

kHz

kHz

kHz
kHz

2

2

2

Voltage Accuracy Test.

10

kHz

kHz

45

Hz,

10

kHz

kHz

4.5

Hz, 2
kHz

10

kHz

45

Hz,
kHz

kHz

5
45

Hz, 2
kHz

10

kHz

10

kHz

kHz

5
45

Hz,

45

Hz, 2

500

Hz

Frequency

AC

PERFORMANCE

700

V

700

V 5

700

V

100

V

100

V 5

100

V

10 V
10 V 5

1 V 10
1 V

.09

V

.01 V
.1

V 5

.01

V

.1

V

.01

V

Output

Standord Test

Table 5-5.

Test.

Rejection

to

770

to

730

to

717

to

109.4
to

104.0
to

102.3
to

10.94
to

10.40
to

10.23

to

1.094

to

1.040
to

1.023

to

.1076

to

.0130

to

.1060

to

.0113

to

.1025

to

.0109

to

.0038

1 Year

(V)

.977
.0724

.0069
.0940
.0087
.0975
.0090
.0021

Section V

Ammeter

3476B

Model

5-14.

AC

Section V

PERFORMANCE

TESTS

Model 3476B

MULTI METER

hp

3476

CyJJ~

IK

±I%

'------------------',.=76

Figure 5-4. Common-Mode Rejection Test.

B

4452

5-4

f

i

5-5

to

power

ground.

earth

ac

operation.

fuses.

Input

5. Remove the Input panel and

Batteries must be connected during battery or

leads.

With the Multimeter

Remove the Multimeter Power Cord.

4. Remove the internal shield.

battery
the back

3. Remove the

the two screws

2.

I.

NOTE

of

bottom

the

bottom

the Multimeter

in

disconnecting the

the

Multimeter while making adjustments.

2.

Use

or

ac line voltage

to

fully charged batteries

1.

Connect the Multimeter TP Q

Instructions.

Turn-On

B.

without

cover and place the Batteries to

cover.

in

the inverted position, remove

fuse

protection

input

protection

input

Amps

the

by

of

the

across

avail-

disas-

of

are

jumper

before using them on the

holder.
fuse holder and across the Ohms

6. Connect a

tip.

charges

Part

No. 00970-67900)

be worn due to the possibility

A. Disassembly Instructions.

PROCEDURES.

3.

Use

a soldering iron with agrounded

PRE·ADJUSTMENT

Multimeter.

tools to earth ground to remove static

2.

COM

terminal to earth ground. Touch all

Attach the Multimeter

able for this purpose.
meter. Conductive wristbands (-hp-

1.

Ground the hand while disassembling and working on the Multi-

damage.
sembled. The procedures below must be followed to prevent possible
static discharge from a hand or tool when the Multimeter is

The hybrid circuits in the Multimeter may be permanently damaged

static charge buildup.

not

instrument. Nylon gloves should
points on the main assembly will degrade the preformance
board or switches. Contamination or fingerprints on high impedance

Wear

clean cotton gloves when working on the main assembly circuit

so.

you

are

qualified to do

not

perform any servicing other than that

are

for

use

by

I

qualified personnel only.

WARNING

To

Section V

contained in the operating instructions unless
avoid electrical shock, do

These servicing instructions

Model

3476B

Section V

5-19.

ADJUSTMENT

PROCEDURE.

ADJUSTMENT

PROCEDURES

NOTE

Model

3476B

5-20. Refer to Figure 5-5 for the following adjustments.

NOTE

The resistors usedinthe adjustment procedure

must be floating.

5-21.

Power

Supply

Adjustment.

a.

Connect aDCDigital

point

and ground.

b. Adjust

Voltmeter.

c.
the adjustment range
JMPR 7. Removing JMPR 7 will allow a more positive ad-

justmentofTP + 6.

5-22.

a. A I kilohm resistor should stillbeconnected between

the V

In

the + I test

b. Ensure

1.1

kn
.078 and .082 on the display.Ifthese limits
tained, an indication

fully counterclockwise.

5-23.

5-24. The following adjusment requires

meter be settoa DC V

applied. Since the Multimeterisauto

to force ittothe 110 V range and
tion

to

a.

Remove

in the previous step.

b. Set the function to

resistor between

Multimeter autoranges to the 1.1 megohm range, push the
HOLD

range.

c.

Change the Multimeter FUNCTIONtoDC
move the I megohm resistor from the
with

a short.

d. Connect a

ground (TP Q

e. Connect theDCDigital
Adjust R38 for an indication between -.3 and +.3
the Digital Voltmeter.

5-6

R47

for

Ifitis

not

possible to adjust within this limit, change

Substrate

Input

keep it there.

pushbutton

Adjustment.

and

COM

point

andTPG.

that

range and adjust R42 for an indication between

Amplifier

the

jumper

the

jumper

).

Voltmeter

5.94to6.06

of

R47 by replacingorremoving

terminals. Connect a

the

Multimeter downranges to the

of

000to078isacceptableifR42

Zero

Adjustment.

function,

connected

kn

n/V

and

in. Thisisequivalentotthe I 10 V

between UI pin 12 and analog

Voltmeter

between + 6 V test

V de on the Digital

jumper

cannot

that

110 V range with no

ranging,itis

then

use the HOLD func-

between

and

connect

COM

terminals. When the

input

the Multi-

+ a and

a I megohm

and replace it

to Test

mV

between

be ob-

input

necessary

TP

V. Re-

Point

A.

de on

The following adjustment requires the same test

setup. Do

not

change the setupofFUNCTION

settings.

5-25.

Integrator

5-26. This test requires
as

the previous adjustment.

a. Adjust RIO for a display equal

value at Test Point Ainthe

Example:

Voltage

.2 mV x(-

If

RIO does

b.

ment,

remove R20 and repeat

been removed,

value listed in Table 6-3.

Removing

Amplifier

at

A = .2 mV

1000)

it

may be necessary to replace it with the

R20

Zero

Adjustment.

the

same test

previous

= .

00.2

V Display

not

have sufficient range for this adjust-

NOTE

setup

to-1000

adjusment,

Stepa.If

changes the displayina pusitive

direction.

is

5-27.+DC

a. Remove the DC Digital

tween UI pin 12 and analog ground. Release the HOLD

function, and remove the short from the

b. Set the Multimeter FUNCTIONtoDCV.Apply an

inputof+

the

1.1

c. Adjust R47 for a display

have sufficient range, change the adjusment rangeofR47

G

by replacingorremoving JMPR 7. Removing JMPR 7 will
allow a more positive
display in a negative direction.

5-28.-DC

a. Leave the Multimeter FUNCTION set to the DC V

and HOLD function

- 1.000.

b. Adjust

5-29.

a.

Function

Volt

Gain

Adjustment.

Voltmeter

1.000

V de.

The

Multimeter should autorange to

V range for this adjusment.

of

1.000.IfR47 does

adjustmentofTP

Volt

Gain

Adjustment.

out.

Change the

RI4

for a Multimeter displayof- 1.000 V de.

Clock

Frequency

Set the Multimeter FUNCTION to

out

and - 1.000 volts connected to the input.

Adjustment.

+6 and change the

input

input.

and functions

times the

± I

count.

R20 has already

and

jumper

from + 1.000 to

DCV,HOLD

be-

not

5-7/5-8

cover

dis-

bottom

Fl

00.

Fuse

Replacement.

both

fuses are easily accessible for testing.

Line

and

Battery

AC

power from the instrument. Power

I WARNING'

the battery fuse
Disconnect the battery leads before unsoldering

AC

service personnel only.
supply jumpers should be changed by qualified
connect
Before changing the power supply jumpers

removed,
5-37. With the Multimeter inverted and the

5-36.

at 100 Hz.

the input.

ac

to

V

range,

V

Hz

V ac at 100 Hz.

1.1

0.100

to

0.100

in.

on the

and HOLD, set the

R9

to

input

back to 1.00 V ac at 100 Hz.

input

level

for a display between .099 and .100.

Adjust

f. Change the input back

Adjust R48 for a display between .995 and .997.

e.

Change the

Adjust R9 for a display between .099 and .100.

d. Change the

c. Adjust R48 for a display between .995 and .997.

b. Apply a 1.0 V ac signal at 100

push the HOLD pushbutton

When

0.3 V to the input.
Multimeter FUNCTION to V AC, and apply

To

go

to the

1.1

V

range

be

the

Re-

the as-

posi-

to

of

.1

010.

rangel.

of

at-

the

is

input.

V

V.

(.11

all jumper wires for

have to be read-

to

change

to

AC

each numbered jumper.

of

used.

operating at any

5 kHz to the

locator drawing

is

will

the instrument

of

are

changed, be sure to

NOTE

is

necessary

If

is

wired internally. The instru-

of

Line

Options.

at

Adjustment

component

wires

it

is

wired.

is

capable

Power

wires in the power transformer primary

is

wired,

the

C4

for a display between .1000 and

.1

V range.

High

Frequency

the new configuration.
tach a new label to the instrument, identifying
If

the jumper

if

a different line frequency

of

jumper

contains a label identifying the line voltage and fre-

Changing

c. Adjust

b. Apply a 0.1 V ac signal

a. Set the Multimeter FUNCTION

AC

sembly identifies the position
each line voltage. The
5-35. Figure 7-2 shows the position

justed
circuit. The clock frequency
tion
for which it
operated at a line voltage and frequency other than the one
quency for which it
ment
upon how the instrument
line voltages and frequencies listed in Table 1-3, depending
5-34. The Multimeter

5-33.

range to the

lease the HOLD function and allow the Multimeter to auto-

5-32.

%.

For

the

NOTE

the instru-

of

and

Zero

Adjustment.

3,

with the fuse shorted.

This

is why the display is

the fuse is a part

Gain

of

ACV.

Converter

calibration.

AC

adjusted high in Step
ment
The resistance

FUNCTION to

a. Disconnect the previous setup and set the Multimeter

5-31.

NOTE

terminal (F2).

line operation, adjust R43 for 795 Hz ± 10 Hz.

f. Remove the

e.

Adjust R16 for a display

d. Change the

c. Adjust R15 for a display

b. Set the Multimeter FUNCTION to

In

a. Connect a

Ohms

Hz

b. Connect an electronic counter

I megohm

the V

5-30.

50
adjust R43 for an indication
Multimeter

jumper

from the fuse.

of

10.03 to 10.04.

input

999

input.

of

the

resistor

to

wire across

±0.1 %resistor

jumper

to

10 kilohm, ± 0.1

to

1001.

k.12

and connect a

the

fuse that protects

Adjustment.

of954

Hz

on the counter.

is

60

Hz line frequency,

to

D.

If

test point

to be operated from a

Section V

PROCEDURES

ADJUSTMENT

Model 3476B

5-9(5-10

Locator.

Hz

FREQ

FREQ

Adjustment

=

954

= 795 Hz

STROBE

ADJUST
AC

HIGH

LINE
LINE

60

Hz

50

Hz

DISPLAY

Figure 5-5.

GATE

BIAS
BACK

B

56

, I

'

I ,

o

ADJ
OHMS

OUTPUT
INPUT

AMPLIFIER

ADJ

DC

ADJ

GAIN

-

ZERO
INTEGRATOR

OUTPUT

COMPARATOR

ADJ

CLOCKFREQ

ZEROADJ

INPUT

AMP

ADJ

.NMOS

SUBSTRATE

~

43

R

~

38

F!

FI

Ii

ZERO

ADJ

AC

ADJ)

CONVERTER

+B

CONNECTOR

(+

DC

GAIN

'OW,"

SU'"

GAIN
AC

CONVERTER

- B

CONNECTOR

VIl.

J5

COM

J4

A

J3

y

AO"

~

-8

630

to

770

669

to

730

682

to

717

90.5

to

109.4

96.0

to

104.0

97.7

to

102.3

9.05

to

10.94

9.60

to

10.40

9.77

to

10.23

.905

to

1.094
.960

to

1.040
.977

to

1.023

to

.1076

.0069

to

.0130

.0040

to

.1060

.0087

to

.0113

.0975

to

.1025

.0090

to

.0109
.0038

.0021

to

9920

thru

10,080

994

thru

1006

99.4

thru

100.6

9.92

lhru

10.08

.992

thru

Result

Test

Cycle

1.008
.102

.911

+

1007.0

10.06

.

.1006

+

.1006

-

.0103

thru

thru

993

to

99.3

to-100.7

to+10.06

9.94

to

.994

to+1.006

.0994

to

.0994

to-

.0097

to

Year

Calibration

.098

+

+9.94

-

+

+

1

Limit

Test

CARO

_

_

By:

Date

Tests

Performed

Cycle

TEST

767
228
715

109.1

103.7

101.9

10.91

10.37

10.19

1.091

1.037

1.019

.1073 .0724
.0129
.1057
.0112
.1022
.0108
.0037

1005.0

100.5

10.04

.1005
.0103

to

to
to

to
to

to

to
to
to

to
to
to

to

to
to

to

to

to

to

10,060

1004

100.4

10.06

1.006
.102

.909 .889

+

to+10.04

to

-

to+l.004

to­to-

633
672
685

90.9

96.3

98.0

9.09

9.63

9.80

.909
.963

.980

.0727
.0071
.0943
.0088
.0978
.0091
.0023

thru

thru

thru

thru

lhru
lhru

thru

995.0

to

99.5

to·

9.96

.0995

to+.1005

.0995
.0097

Day

Calibration

kHz

2

kHz

kHz

2

kHz

2

kHz
kHz

Hz

9940

996

99.6

994

.994
.0980

.891

+

-

+9.96

+.996

+

90

PERFORMANCE

kHz

Hz, 2

kHz

Hz,

kHz

Hz, 2

kHz

Hz,

kHz
kHz

Hz,
Hz. 2

kHz'

kHz

kHz

kHz

kHz
kHz

10
5
45

10

5
45

10

45

10
5

45

10
10

5
45
45
500

Accuracy

Range

Range

Accuracy

Accuracy

_

34766

V Range

V

kl1
kl1

kl1
kl1

Range

Range

Range

V

V Range

V

V

V
V
V -

700

V

700

V

700

V

1100

100

V

100

V

100

V

110

V Range

V

10

V 5

10

V

10
11

V Range

V

1
1 V
1 V

1.1 V Range

.09

V

.01

V 5

.1
.01

V

.1

V

.01 V
.003

V

.11 V Range

AC

Voltmeter

10,000
11,000

1000

1100

100

kl1

110

kl1

10

kl1

11

kl1

1.0

kl1

.1

kl1

kl1

1.1

Ohms Accuracy

900mA

DC

Ammeter

+

1000

1100

100

110

V Range

+lOV

-10V ­11

V Range

+

1.0

1.1 V Range

+

.100
.100
.010

.11 V Range

DC

Voltmeter

Model

5-12

5-10

5-8

5-6

Number Test

Paragraph

Serial

No.

Multimeter

Hewlett-Packard

6-1

of

of

t:>.

with

referred to.

in

a note at

o.

A

so

marked

with a letter

is

the preferred

t:>.l

be

t:>.

in

the reference desig-

in

backdating (Section

is

explained

with a letter subscript,

(t)

t:>.

with a number subscript indi-

t:>.,

the part.

is

discussed

t:>.

of

is

not listed, include:

by

a dagger

PARTS.

of

the subscript indicates the number

earlier component. A

of

the part.

in

backdating which should

of

the page. A

an

t:>.

with a number subscript, e.g.,

CHANGES.

PROPRIETARY

subscript indicates the component listed

t:>.a'

or

of

three symbols; i.e.,

PARTS

d. Function and location

c. Descri ption

b. Instrument serial number.

a.

Instrument model number.

Hewlett-Packard instruments.
nator column are available only for repair and service

6-11. Items marked

6-10.

the change
VIll). The number

cates the related change

the bottom

subscript indicates a change which
replacement for
no

e.g.,
by one

6-9. Components which have been changed are

6-8.

6-7. To obtain a part that

and serial numbers.

of

office locations.) Identify parts by their

or

inquiry

INFORMATION.

of

Table 6-3.

in

Table

6-3

following

6-2

for list

of

manufacturers.)

of

is

a five-digit code.

of

in

their

abbreviations

of

the part

.)

of

the part. (See list

of

a part

is

given

the first time the part

in

the instrument (Qty column).

of

each part, together with any applicable

6-3

in

alphameric order

lists parts

Hewlett-Packard part numbers. lnclude instrument model
A for list
to your local Hewlett-Packard Field Office. (See Appendix
6-5.

To obtain replacement parts, address order

6-4.

ORDERING

listed at the conclusion
their respective assemblies. General miscellaneous parts are
6-3. Miscellaneous parts are listed

d.

Manufacturer's part number.

(See

Table

c.

Typical manufacturer

Table

6-1

b.

Description

number appears.
The total quantity

a.

Total quantity used

notes, and provides thefollowing:
Part umber
reference designators and indicates the description, -hp­ment parts. Table
6-2.

This section contains information for ordering replace-

VI

Section

PARTS.

6-6.

NON-LISTED

PARTS

VI

REPLACEABLE

SECTION

6-1.

INTRODUCTION.

Model

3476B

Section

Ag
AI
A.
Au

C

..
cer
coef

comp
conn

dep

OPOT
OPST

elect
encap

F

FET

fxd

GaAs.
GHz

gd

Ge
gnd

H.

Hg .

A.

B.
BT.

C.

CR
OL
OS.

E

..

F

VI

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

...

....

......

double-pole

double-pole

.

field

.

glgahertl

misc

.

......

aluminum

.....

ampere(s)

·

......

......

·..coefficient

.......

composition

. . . .

connection

double

single

ele<'trolytlc

· .enCdpsU

·..farad(s)

effect

·

gallium

10t9hertl

germanium
grounrHedl

henry(lest

...

·

·

·

·..delay

electronic

·

....

silver

gold

capacitor

ceramic

common

deposited

throw
throw

Idled

transistor

....

fixed

arsenide

guaflJ(ed)

mercury

.

assembly

motor

battery

capacitor

..

diode

.Iamp

part

....

fuse

Model

3476B

Table

6-1.

Standard

Hz

10
impg
incd
ins

kr2.
kHz

L .
lin
log.

mA

MHI

M~2

rnetflm
mfr

mtg
mV

J.1F

J.1s

J.1V

nA
NC
Ne
NO

Prefix

tera
giga
mega
kilo
hecto
deka
deci

FL
HR
IC

J

..

K.

line

L.
M
MP
P.

....

hertz

.........

..

kilohm(s)=10+3ohms

.

. . . . . . . .

milliampere(s)

. .

megahertz=10+6hertz

...

megohm(s)-10+6ohms

: : : :

'~i'lli~~I~isi

. . . . . . . ....

....

microvolt(s)

.

nanoampere(s)

Symbols

T

G

MorMeg

K

or

k

da

......

ABBREVIATIONS

(eycle(s)

per

second)

.

inside

diameter

.

impregnated

.incandescent

..

insulation(ed)

kilohertz=10+3hertz

..

inductor

.....

linear

logarithmic

3

= 10-

amperes

.. ..

metalfilm

...

manufacturer

...

millisecond

'='

;r;~~~~~~

.

microfarad(s)

microsecond(s)

6

= 10-

.Mylar@

9

= 10-

amperes

..

normally

.....

...

normally

DECIMAL

Multiplier

12

10

9

10

6

10

3

10

2

10

10

1

10-

DESIGNATORS

...

.heater

integrated

..

......

...

inductor

...

mechanical

NPO

r2
obd
00

p .

pA.
pc

taper

pF

taper

piv

plo

pos
poly
pot

p-p

ppm
prec.

R

Rh

volts

rms
rot.

Se

closed

sect.

neon

Si

open

MULTIPLIERS

filter

0

OCR

circuit

jackRT.....

relay S

T.

meter

TB

part

TC

plug

TP.

Abbreviations.

........

.
.

.

..

. ' peak inverse

.

precision

long

term

..
..

Prefix

centi
milli
micro

pico
femto

R.

..

negative

(zero

temperature

nanosecond(s)=10-

...

not

separately

.........

......

orderbydescription

........

outside

...

picofarad(s)

......

..

·

..

parts

(temperature

stability

andlor

·

.

root-mean-square

·

Symbols

transistor-diode

.....

.

terminal

positive

zero

coefficient)

9

seconds

replaceable

ohm(s)

diameter

...

peak
picoampere(s)
printed

circuit

10-12farads

voltage

·

partofvar.

..

position(s)

polystyrene

potentiometer

.peak-to-peak

per

million

coeffient,

tolerance)

.....

resistor

·

.rhodium

.

rotary

.selenium

..

section(s)

silicon

Multiplier

2

10-

3

10-

6

10-

9

10-

12

10-

15

10-

18

10-

·

transistor

·

resistor

thermistor

·

.switch

transformer

board

·

thermocouple

· test POint

sl.
SPOT
SPST

Ta
TC

..
Ti02·
tog
tol
trim

..

TSTR

V.

vdcw.

W

...

wi

..

wiv

wlo

average value

TS

. . .

U .

V....

W

X . .
XOS
XF
Y .

Z .

...

....

vacuum

.....

alternating

direct

optimum

shown

no

standard

tube,

..

. .

..

®

single-pole

double-throw

single-pole

....

temperature

.......

titanium

.....

.

current

working

current

working

.........

working

inverse

......

..

value selectedatfactory,

(part

maybeomitted)

type

number

or

selected

OupontdeNemours

....

terminal

neon

bulb,photocell,

..

slide

single-throw

tantalum

coefficient

dioxide

...

toggle

tolerance

..

trimmer

transistor

..

volt(s)

voltage

....

variable

voltage

watt(s)
..

with

voltage

without

wirewound

assigned

special

type

STO-B-2734

microcircuit

..

cable

socket

lampholder

fuseholder

crystal

network

strip

etc.

6-2

Table

Mfr

No.

Allen-Bradley

01121

Pyrofilrn

03888

Motorola

04713

Kelvin

07088

F<Jirchild

07263

TRW

077.16

CorningGIWk

16299

Corning

24546

27014

National
Hewlett-PackardCoCorporate

28480

Sprague

56289
71400

Bussman M fg
Electro

72136

Johnson

74970
75915

Inc

Littelfuse

Corp

Semiconductor

Electric

Serniconductor
Burlington

Glass

Semiconductor

Electric

Motive

E F

Inc

6-2.

Code

ListofManufacturers.

Oescr ilJt

ion

Co

Products

Co

Div

Div

Elec

Cmpnt

Works

Div

(Bradford)

Corp

Co

DivofMcGraw-Edison

MfgCoInc

Co

HQ

Co

Adelress

Milwaukee,
Whi
Phoenix,
Van
Mountllin

rpllnY,

Nuys,

WI

NJ

AZ

CA

View,
Burlington,
Raleight,
Bradford,

NC

PA
Santa Clara,
Palo

Alto,

Louis,

CA

Adams,

MO

North
St.
Willimantic,
Waseca,

MN

Des Plaines, I L

Zil1

Code!

53212
07981
85008
91401

IA

52601

94040

CA

27604

16701

MA

95051
94304
01247

CA

63017

CT

06226
56093
60016

6-3

F

CR

CR

TO-402R-F
TO-2803-F
TO-8872-F

TO-l004-F

TO-3481 - F

1-1/2

143

Part Number

C4-1/8-
C4-1/8-
C4-1/8-

CB

1035

2100-3529
2100-3524

2100-3528
MF7Cl/2­CB2265
2100-3524
2100-3522

CB1045
C4-1/8­CB2055
RS-5
CCF-993-N330

1853-0020
1854-0071

MPS6562

1854-0071
1205-0011
2N3725
1853-0020
1855-0308
1854-0071

9170-0016
1460-1486

5040-8013

1251-4261

6008-32CN
275001
AGC

312.031

313.062S
03476-69502
SZ

10939-89

SZ

10939-

1910-0034
1901-0040
1906-0069
SZ

10939-98

1901-0040
SZ

10939-56

1901-0376
1901-0025
SZ

10939-56

0160-3042
30D506G016CB2
150D335XOO15A2
292P47292
150D606XOO06B2

150D226X9015B2

292Pl0292

150D33X9010B2

0160-3847
292Pl0292

150D475X0010A2

0160-3847
0160-2150
0160-3847

150D226X9015B2

0160-0577

DM15F391J0300WVl
150Dl05X9035A2
2222-809-05001

0160-3847
0150-3731

03476-68001
03476-66510

Mfr

C4-1/8-

TO-1402-F

C4-1/8-

TO-2003-

24546

24546

24546
03888 PME55S
24546

24546

01121

01121 CB1065
28480
28480

28480

01121
28480
28480

01121
03292
01121
05524
07716

28480
04713

28480
28480
01295
28480

28480
28480

28480

28480
28480
28480

91506
75915
71400
75915
75915

28480
04713

04713

28480
28480
28480
04713

28480
04713
28480
28480
04713

28480
56289
56289
56289
56289

56289
04522 DM15F331J0500WVl
56289
56289
56289 150D335XOO15A2
28480
56289
56289
28480
56289 150D685XOO06A2
28480

28480
56289
28480
62136
56289
04935
28480
28480

28480

Code
Mfr

TC=-+-100

TC=0+-100

TC=0+-100

TC=0+-100

TC=0+-100

TC=-400/+700

TC=-900/+1100

20%

TC=-900/+1200

20%

20%

TC=-400/+800

TC=0+-100

TC=-900/+1100

FT=200MHZ

N-CHAN

D-MODE

SI

TERMINAL)

FOR

DSMl

IEC

UL

00-35

TC=-.009%

00-35

TC=-.055%

TC=-.055%

TA

TA

TA

TA

TA

TA

TA

MICA

TA

TA

PF

A1Pl

2NS

2NS

00-7

50WVDC

16VDC

15VDC

6VDC

15VDC

500WVDC

200WVDC

10VDC

15VDC

25WVDC

200WVDC

10VDC

25WVDC

6VDC

25WVDC

15VDC

50WVDC MET

300WVDC

1000WVDC

1.25X.25 U L I
15 PIN

007

PD=.4W

PD=.4W

00-7

PD=.4W

300WVDC

35VDC

CER

CER

CER

CER

EC

CER

AL

MICA

MICA

.125W F

1%

.125W F

1%

.125W F

1%

.125W F

.25W

FC

.25W

FC

lK

OHM

20%

50K OHM
100 OHM

20%

.50W 02995

.25W

FC

50K OHM
lOOK OHM

5%

.25W

FC

1%

.125W F

.25W

FC

2W

MO

TC=+-200

2W

F

TC=0+-100

SI

PD=300MW FT=150MHZ 28480

SI

PD=300MW FT=200MHZ

SPS

6804K

SI

PD=300MW

2N3725
SI

PD=300MW FT=150MHZ

DUAL

SI

PD=300MW FT=200MHZ

POWE

R

PIN

FEMALE

TYPE .25FUSE

X.093

UL

SLO-B

LO

5%

00-7

5%

00-7

80MA

8NS

30V

50MA

lA

5%

00-7

30V

50MA

5%

00-7

35V

50MA

100V

200MA

5%

00-7

.047 UF

+-10%

50UF

+75-10%

3.3UF

+-20%

4700PF 200WVDC

60UF

+-20%

22UF

+-10%

330PF

+-5%

1000PF

+-10%

33UF

+-10%

3.3UF

+-20%

.01UF

+80-20%

1000PF

+-10%

4.7UF

+-20%

.01UF

+80-20%

6.8UF

+-20%

33PF

+-5%

.01UF

+80-20%

22UF

+-10%

1.8UF

+-20%

390PF

+-5%

1UF

+-10%

R 1.0 TO 3.5

.01

UF 25WVDC CER

.01

UF

+-20%

lA-HR

RECHARGEABLE

BOARD 28480

1%

402K

5%
5%

VAR
VAR

VAR

1M

1%

5%

VAR
VAR

2M

5%

5K

1%

1%

NPN
NPN

PNP

NPN

NPN

NPN
NPN

.281

INCLUDING

4.75V

7.32V

30V

BRDG 400V

5.11V

3.65V
PRP

PRP

3.65V

TRMR-AI

4.8V

MAIN

SINK SGL

DISPLAY

GE

ASSEMBLY

1%

.125W F

TC=0+-100

1%

.125W F

Description

Rep

I

ace

a b I

ePa

rt5

(C

0 n

t'

d)

1

RESISTOR 14K

1

RESISTOR 200K

2

RESISTOR 402

1

RESISTOR

1 RESISTOR 280K
1 RESISTOR 88.7K

4 RESISTOR 10K
1 RESISTOR 10M
1

RESISTOR,

2

RESISTOR,

1 RESISTOR,
1 RESISTOR

RESISTOR 22M

1
2 RESISTOR,

RESISTOR,

2

RESISTOR lOOK

1

RESISTOR 3480 OHM

1

RESISTOR

1

RESISTOR

1

RESISTOR 10M

1

TRANSISTOR
TRANSISTOR

TRANSISTOR

1

TRANSISTOR

1

HEAT

1

TRMJSISTOR

3

TRANSISTOR

1

TRANSISTOR-JFET

17

TRANSISTOR

3

FERRITE BEAD

3 SPRING, FUSE CONTACT (INPUT
1 RECEPTACLE, AC
1

CONNECTOR-15

2

FUSEHOLDER-CLIP

1 FUSE 1A 125V
1

FUSE 1.5A 250V 1.25X.25

1 FUSE .032A 250V 1.25X.25
1 FUSE .063A 250V

1 LED
1

DIODE-ZENER

1

DIODE-ZENER

2 DIODE
5

DIODE-SWITCHING

1

DIODE-FW

1

DIODE-ZNR

5

DIODE-SWITCHING

2

DIODE-ZNR

2

DIODE-GEN

2

DIODE-GEN

2

DIODE-ZNR
CAPACITOR-FXD

CAPACITOR-FXD

1
2

CAPACITOR-FXD

1

CAPACITOR-FXD

2

CAPACITOR-FXD

2

CAPACITOR-FXD

1

CAPACITOR-FXD

2

CAPACITOR-FXD

2

CAPACITOR-FXD

2

CAPACITOR-FXD
CAPACITOR-FXD

2

CAPACITOR-FXD

1

CAPACITOR-FXD

CAPACITOR-FXD

1

CAPACITOR-FXD

1

CAPACITOR-FXD

CAPACITOR-FXD

2

CAPACITOR-FXD

1

CAPACITOR-FXD

1

CAPACITOR-FXD

1

CAPACITOR-FXD

1

CAPACITOR-V

4

CAPACITOR-FXD

1

CAPACITOR-FXD

1

BATTERY

1

PC

Qty

Tab

Ie 6 -3 .

0698-4479
0757-0472
0698-4453
0698-4539
0698-4532

0698-4512
0683-1035
0683-1065
2100-3529
2100-3524

2100-3528
0757-0059
0683-2265
2100-3524
2100-3522

0683-1045
0698-3152
0683-2055
0811-0006
0698-7512

1853-0020
1854-0071
1853-0318

1854-0071
1205-0011
1854-0547
1853-0020
1855-0308
1854-0071

9170-0016
1460-1486

5040-8013
1251-4261

2110-0269
2110-0099
2110-0043
2110-0420
2110-0311

03476-69502
1902-3085

1902-3128

1910-0034
1901-0040
1906-0069

1902-0041

1901-0040

1902-3054

1901-0376
1901-0025
1902-3054

0160-0575 1

0180-0339

0180-0210

0160-0157

0180-0106

0180-0228

0140-0207

0160-0153

0180-0229

0180-0210

0160-3847

0160-0153

0180-0309

0160-3847

0180-1701

0160-2150

0160-3847

0180-0228

0160-0577

0140-0200

0180-0291

0121-0487

0160-3847

0150-3731

03476-68001

03476-66510

HP Part Number

11

Cl08

Cl02

014

-

R23
R22

10103-105

Cl07,

A1R25
A1R24
Al
Al
A1R20

A1R19
A1R18
A1R17
A1R16
A1R15

A1R14
A1R13
A1R12
A1Rl0
A1R9

A1R8
A1R4
A1R3
A1R2
A1Rl

Al0l06,107
A
Al0l02

Al0l0l
Al0l00

Al017
Al015
Al02

AlL100-102
A1J3 - J5

A1J2
A1Jl

A1Fl00
A1F3
A1F2
A1Fl

A1DSMl
A1CR105

A1CR104

A1CR10l,102
A1CR100
A1CR14
A1CR12

A1CR9, 10,
A1CR7
A1CR5, CR6
A1CR2, CR3
A1CRl

A1Cl13
A1Cl12
A1Clll
A1Cl09
A1

A1Cl06
A1Cl05
A1Cl04
A1Cl0l,
A1Cl00
A1C21, C22
A1C20
A1C19
A1C17, C18
A1C12
A1Cll

A1Cl0
A1C9
A1C8
A1C7
A1C5
A1C4
A1C3
A1Cl

A1BT100
Al

Designation
Reference

Section

VI

Model 3476B

Section

VI

Reference
Designation

A1R26
A1R27
A1R28

A1R29

A1R31
A1R34

A1R35

A1R36,

R37

A1R38

A1R39

A1R40
A1R41

A1R42

A1R43

A1R45

A1R46

Al

R47
A1R48
Al

R50
A1R51

Al

R55
A1R100
Al

Rl0l
Al

Rl02
A1Rl03,104

A1Rl05
A1R106
A1Rl07
Al

R109,110
A1R111

A1R112
A1Rl13
A1Rl14

A1Rl16
Al

Rl17
A1

Rl18
A1Rl19
A1

R120
A1R121

A1

R122

Al

R123
Al

R124
Al

R125
Al

R126 0683--1035
Al

R132
Al

R149
A1R153

A1S1-S6
A

lSl-S6

A1Tl00
A1T101

A1Ul
A1U2, U3

A1U4
A1U5
A1U6

J1

J2

HP Part Number

0757-0283
0757-0442
0698-4453
0698-4424
0683-1025

0698-4474
0757-0465
0757-0453
2100-3527
0683-4745

0698-3557
0698-3262
2100-3526
2100-3522
0811-3420

0698-4020
2100-0558
2100-3525
0698-4435
0683-1025

0757-0454
0683-0335
0683-5105
0757-0277
0683-1015

0757-0410
0683-0475
0683-2015
0683-3015
0683-2435

0683-2425
0683-1005
0683-7505

0683-2015
0757-0283
0698-3161
0698-5578
0683-1035

0683-2035
0683-3925
0757-0453
0698-4504

1810-0259

0757-0281
0698-3499
0698-4439

03476-61901
03476-61902

9100-3855
9100-3497

1813-0091
1826-0139

1820-0223
1826-0317
1820-0196

0340-0060
0340-0092

1251-4261

1205-0011
1460-1467
1460-1469
5040-8013
0370-2913
0370-2914
2110-0269

1251-3379
1251-4262
1251-4743

Table

6-3.

Replaceable

Qty

2

RESISTOR 2K

1

RESISTOR 10K

2

RESISTOR 402

1

RESISTOR

1

RESISTOR-FXD

1

RESISTOR 8.45K

1

RESISTOR lOOK
3 RESISTOR 30.1K1%.125W F
1

RESISTOR,
1

RESISTOR
1

RESISTOR 806
1

RESISTOR 40.2
1

RESISTOR,
2 RESISTOR,
1

RESISTOR 1
1 RESISTOR 9.53K1%.125W F

1

RESISTOR-VAR
1

RESISTOR,
1

RESISTOR-FXD
4

RES-FXD
1

RESISTOR-FXD
1

RESISTOR-FXD
1

RESISTOR-FXD51OHM+-5%
1

RESISTOR-FXD
2

RESISTOR-FXD
1

RESISTOR-FXD
1

RESISTOR-FXD
2

RESISTOR-FXD
2

RESISTOR-FXD
1

RESISTOR-FXD
1

RESISTOR-FXD
1

RESISTOR-FXD
1

RESISTOR-FXD75OHM+-5%
2

RESISTOR-FXD

2

RESISTOR-FXD

1

RESISTOR-FXD

1

RESISTOR-FXD

4

RESISTOR-FXD

1 RESISTOR 20K OHM
1

RESISTOR-FXD

3

RESISTOR-FXD

1

RESISTOR-FXD

1 RESISTOR NETWORK 300 OHM
4

RESISTOR-FXD

1

RESISTOR-FXD

1

RESISTOR-FXD

1

RESISTOR-FXD

1

SWITCH ASSEMB LY FOR
1

SWITCH ASSEMBLY FOR
1

TRANSFORMER,DCTO
1

TRANSFORMER,
1

PC

HYBRID

2

ICMC1458OPAMP

1

ICLM301AOPAMP

1

IC,

1

2

8

1
1
1
2 CONTACT
1

3

3
2 FUSE CLIP

3
1
1

LINEAR

ICUA723C VRGLTR

Al

MECHANICAL
INSULATOR
INSULATOR

SOCKET-15

HEAT

SINK-(0100)

SPRING

CONTACT-TOP

AC

POWER
PUSHBUTTON-PLAIN
PUSHBUTTON-MARKED

25 PIN CONNECTOR
15

PIN CONNECTOR M

RECEPTACLE-ACP

Description

1%

.125W F

1%

.125W F

1%

.125W F

l.4K1%.125W F

1000 OHM5%.25WFCTC=-400/+600

1%

.125W F

1%

.125W F

VAR5KOHM

470K5%.25WFCTC=-800/+900

1%

.125W F

1%

.125W F

VAR

20K OHM

VAR

lOOK OHM

.5%7WPW

20K OHM

VAR

200 OHM
2490 OHM

1K OHM5%.25WFCTC=-400/+600

33.21<

OHM

3.3 OHM

49.9

OHM+-l%

100 OHM
301

OHM

4.7 OHM
2000HM
300 OHM
24K OHM

2.4K OHM
10 OHM

200 OHM

2000 OHM

38.3K OHM
4K OHM+-5%
10K OHM

+-5%

3900 OHM

30.1K OHM

69.8K OHM

10K OHM
2740 OHM

40.2K OHM
3240 OHM

POWER

PARTS
FEEDTHRU (LARGE)
FEEDTHRU (SMALL)

PIN

DISPLAY

SPRING-INPUT

RECP

WZ

Parts(Cont'd)

TC=0+-100

TC=0+-100

TC=0+-100

TC=0+-100

TC=0+-100

TC=0+-100

TC=0+-100

20%

TC=0+-100

TC=0+-100

20%

20%

TC=0+-50

TC=0+-100
+-10%
20%

+-1%

.125W F

+-1%

.125W

+-5%

.25W

.25W

.125W

+-5%

.25W

+-1%

.125W

+-5%

.25W

+-5%

.25W

+-5%

.25W

+-5%

.25W

+-5%

.25W

+-5%

.25W
.25W

+-5%

.25W

+-1%

.125W

+-1%

.125W

.125W

+-5%

.25W

.25W

+-5%

.25W

+-1%

.125W

+-1%

.125W

+-5%

.25W

+-1%

.125W

+-1%

.125W

+-1%

.125W

03476-66501ONLY
03476-66510ONLY

DC

F

SHIELD

(INPUT FUSE SPRING)

TC=0+-100

Mfr
Code

24546
24546
24546
16299
01121

24546
24546
24546
28480

01121

16299
16299
28480
28480

07088

16299

73138

28480
16299

01607

24546
01121
01121

24546

01121

24546

01121

01121

01121

01121

01121

01121

01121

01121

24546

16299

24546

01121

01121

01121

24546

24546

28480
01121

24546

16299

16299
28480

28480

28480

28480
28480
04713

27014
28480
07263

98291
9829
28480
28480
28480
28480
28480
28480
28480
91506

28480
28480
28480

Mfr

C4-1/8-

TO-2001-F

C4-1/8-

TO-l002-F

C4-1/8-

TO-402R-F

C4-1/8-

TO-1401-F

CB1025
C4-1/8-

TO-8451-F

C4-1

/8-

TO-l

C4-1

/8-

TO-30
2100-3527
CB4745

C4-1/8-

TO-806R-F
C4-1

/8-

TO-4022-
2100-3526
2100-3522
KM-700

C4-1/8-

TO-9531-F
72PR20K
2100-3525
C4-1/8-

TO-2491-F
CB1025

C4-1/8-

TO-3322-F
CB33G5
CB5105
C4-1

/8-

TO-4992-
CB1015

C4-1/8-

TO-301
CB4765
CB2015
CB3015
CB2435

CB2425
CB1005
CB7505

CB2015

C4-1/8-

TO-2001-F
C4-1/8-

TO-3832-F
C4-1/8-

TO-4001-D
CB1035

CB2035
CB3925
C4-1/8-

TO-3012-F
C4-1

/8-

TO-6982-

1810-0259

CB

1035

C4-1/8-

TO-2741-F
C4-1/8-

TO-4022-F
C4-1/8-

TO-3241-F
03476-61901

03476-61902
9100-3855

9100-3497

1813-0091

MC1458Pl

LM301AH
1826-0317
723HC

FT

-E-15

-E-12(011-6808)

FT
1251-4261
1205-0011
1460-1467
1460-1469
5040-8013
0370-2913
0370-2914
6008-32CN

1251-3379
1251-4262

1251-4743

Model 3476B

Part Number

003-

F

12-

F

F

F

R-F

F

6-4

6-5

03476-04901
7120-6236
7120-6297
7120-3530
7120-6079

0624-0289
0624-0333

5040-8038
5040-8070
5040-8069
03476-90006
8120-1521
5040-8957

4114-0649
03476-40201
03476-00605
1600-0530
1460-1486
03476-24701
2190-0918
3050-0066
2360-0131
2420-0002
7120-5112
7120-5111
7120-5110
7120-5109
7120-5108
7120-5107
1460-1470

Mfr

Part Number

Section

VI

28480
28480
28480
28480
28480

28480
28480
28480
28480
28480
28480
28480
28480
28480

28480
28480
28480
28480

28480

28480
28480
28480

28480
28480
28480
28480
28480
28480
28480
28480

Code
Mfr

d)

HARDWARE

HARDWARE

0

nt'

TAPE

SHELL

(C

MOUNTING

FOAM

TERMINALS)

FASTENING
LOWER

004
003
002
001

PARTS

rt5

MANUAL

WITH

(INPUT

1

ePa

SPACER

I

NG

MA

TION

(BELLY)

5/16

PAN

X 1/4 PAN }PCBOARD

SERVICE

INPUT
(ALUM)

(FOIL)

CONTACT

HELICAL

X 1 1/8 PAN

FICATION

INPUT

OPTION

INPUT

OPTION

INPUT

OPTION

INPUT

OPTION

INPUT

STD

STAND)

MECHANICAL

Description

I

ace

a b I

L-WARN
L-CAUTION

-I

NFOR

4-20

PLUG

SHELL

SHELL

AND

DISPLAY

SLIDING
LOWER
UPPER

POL

YCARBONATE

WASHER

6-32

-ONSERT

DENTI

(TILT

MISCELLANEOUS

Rep

LABEL-NOTE
LABE
LABE
LA

BEL

SCREW, 2 - 28 X
SCREW,
BAIL
LOWER
UPPER
OPERATING
POWER CORD
FOOT
LENS,
PANEL,
SHIELD,
SHIELD,
SPRING, FUSE
SPACER,
LOCKWASHER,
FLAT

SCREW,

NUT

PLATE-I
LABEL-POWER
LABEL-POWER
LABEL-POWER
LABEL-POWER
LABEL-POWER
BAIL-WIRE

Ie 6-3.

1

2

1
1

1
1
1

2
2

1
1
2
1
1
1
1

1
1

3
2
2
2
2
2

1
1
1
1
1

Qty

Tab

4

PCB

HYBRID

03476-04901
7120-6236
7120-6297
7120-3530

7120-6079

0624-0289
0624-0333
5040-8038
5040-8070
5040-8069
03476-90006
8120-1521
5040-8957

4114-0649
03476-40201
03476-00605
1600-0530
1460-1486

03476-24701

2190-0918

3050-0066

2360-0131

2420-0002

7120-5113

7120-5111

7120-5110

7120-5109

7120-5108

7120-5107
1460-1470

HP Part Number

J5

J3, J4,

Designation
Reference

Model 3476B

7-1

charge.

Do

not

flux

use flux remover.

board. Observe precautions against static
not

of

permit traces

8090-0512) when replacing componenets. Do
low flux content solder (-hp­will reduce the accuracy

C line fuse.

AC

line cord befure checking or

I WARNING'

replacing the A
Disconnect the

dis-

No.

Use

Part

to

form on the circuit

of

the Multimeter.

circuit board. Contamination or fingerprints
Wear

clean cotton gloves when working on the

of

the assembly.

contamination
the front panel switch pushbuttons to avoid

by

the power transformerand

assembly. hold it
1f

it is necessary to handle the printed circuit

3.

Use

a soldering iron with a grounded tip.

the Multimeter.
to remove static charges before using them on
earth ground. Touch all tools to earth ground

2.

COM

terminal to

holder.

fuse

holder

and

across

the

ohms

input

protection

batteries

the

bottom

a

grounded

protection

amps

input

place

the

from

down

on

fuses

located

the

and

screws

cover

two

upside

protection

across

the

a

jumper

Multimeter.

the

bottom

remove

Multimeter

panel.

the

input

and

the

the

input

Connect

of

Remove

surface

Remove

e.

the

side

d.

cover.
work

c. Place

the

sliding

b.

avail-

disas-

are

damage.

is

by

static discharge from

in

the Multimeter may be

fuse

to

behind

Attach the Multimeter

able for this purpose.
bands (-hp- Part No. 00970-67900)
working on the Multimeter. Conductive wrist-

1.

Ground the hand while disassembling and

lowed

to

prevent possible

sembled. The procedures below must be fol-

a hand or tool when the Multimeter
permanently damaged
The hybrid circuits

a.

fuses

A

(250

input

A

(250

protection

the

display

by

the

to

ensure

AND

Disconnect

Multimeter

If

input

1

\2

Amps

1/32

Volts/Ohms

input

of

If

the

Check

VII

the

7-6.

meter
gardless
7-5.

in-

indicated

7-4.

DIAGRAMS

you

are

not

by

quali-

Supply

circuitry.

and

schematic

information,

troubleshooting

CIRCUIT

TROUBLESHOOTING

SECTION

To

avoid electrical

are

for use

Power

exchange

and

designators,

assembly

preliminary

]-3.

TROUBLESHOOTING.

so.

PRELIMINARY

qualified to do

in

the operating instructions unless

perform any servicing otherthan that contained

shock or damage to the instrument, do

fied service personnel only.

These servicing instructions

IWARNING'

Multimeter

and

reference

circuit

contains

the

notes

printed

of

section

diagrams
schematic
formation,
7-2. This

]-1.

INTRODUCTION.

the

power

cord.

as follows:

are

not

at

fault,

312.01.5

312.031

the

appropriate

of

the

properly

proceed

2110-0043

PIN

PIN

2110-0420

fuse:

check

and

indicates

side

is

Littlefuse
Bussman AGC I -

-hp- PIN
fuse:

Littlefuse

-hp-

on

the

V)

V)

protection

fuse.

applied

illuminates

decal

the

Multimeter

protection

input

input

to

disassemble

\2

Multi-

near

zero

re-

instrument.

as

powered

VII

Section

3476B

Model

Section VII

7-7.

If

the Multimeter display does

battery

operation:

a. Check

b. Check the

7-8. Connect the Multimeter TP~to

the

ac line fuse(FI).

battery

fuse (FIOO).

not

illuminate inacor

earth ground.

3476B

Model

]·14.

Printed

Circuit

Board

Removal.

7·15. Remove theAlprinted circuit board assembly using
the following procedure:

a.

Disconnect power cord, remove input fuses and
bottom
to

shell. Leave the aluminum

the

P.c.

board.

bottom

shield fastened

AC

7-9. Connect the appropriate
by

the

option

decal.

WARNING

To

avoid electrical shock,donot

line voltageasspecified

I

touch the

AC

line fuse or the line voltage jumpers when the

is

instrument

]·10.

SCHEMATIC

7-1I.Figure

Multimeter and its power supply.

]·12.

PRINTED

7-13. To provide maximum instrument performance for
minimum cost, the Multimeter is designed around a NMOS
Hybrid Integrated Circuit
ated discrete elctronic circuitry are repairable
Hewlett-Packard Manufacturing Division using special
equipment.
permit field repair

Al

entire
assembly (-hp-

to

ranted
specifications. For ordering details,
Packard Sales and Service Office nearest

plugged into ACpower.

DIAGRAMS.

7-1

and 7-2 are schematic diagramsofthe

CIRCUIT

An

exchange program has been established

printed circuit assembly

be fully operational

of

PIN

03476-69510). This assembly is war-

ASSEMBLY

(UI).

This Hybrid and its associ-

the Muitimeter by replacing the

and

with

a factory rebuilt

meet all

contact

you.

EXCHANGE.

onlyatthe

instrument

the Hewlett-

b. Disconnect positive and negative

c.

Remove two polycarbonate spacers.

d. Remove 4PCboard mounting screws - one on each

of

side
corner at the back

assembly
onsert nuts. The
of

to

the switch assembly and the

e.

PullJ4and J5 free from the

f.

Using transformerTl0 Iasa handle, lift the

outofthe top shell back first until itisabove the

the

top

shell.

Handle the
(TI0l)

To

avoid possible damage to theP.C assembly,

do

not
material.
materials such

of

thePCboard.

Al

Assembly will now slide back and clear

P.

C assembly

and the pushbutton switches.

use plasticorbubble packasa packing

Use

non-static charge producing

as

conductive foam (-hp- Part

battery

other

top

shell.

by

the transformer

terminals.

twoineach

PC

No. 9220-1776).

7-2

7-3/7-4

BE

fl.1AY

THE

A

DVM

=WHITE.

IDENTIFIES

NUMBER

NUMBER

CODE

IN

SECTION

OF

SELECTING

ONE

INSTRU·

OF

VALUE

ASSEMBL

ALLOWED.

ANOTHER

AND

USING

MEASURED

~

NUMBER

VALUE

ADJUST.

A

DUE

TO

VARY

VOLTAGE
WITH
WITH

RED,

IDEN­IDEN-

SAME

AS

V

THESE

SE·

Y.

SHOULD

CHARACTERISTICS.

TO

NOMINAL

WERE

(e.g.

THIRD

SECOND

FIRST

COLon

DESCRIBED

METHOD

FROM

niE

OPTIMUM

DENOTES

TRANSISTOR

ARE

INPUT

1:l.1PEDANCE.
GROUND

LEVELS

STRIP.
STRIP.

COLOR.

CODE.

COLOn:

IS

THE

MAY

VARY

FACTORY.

SHOWN,

SCREWDRIVER

IN

INSTRUMENT

SHOWN

TO

CIRCUIT

WIDER

BASE

COLOR

WIRE

MANUAL.

ANOTHER.

AT

VALUE

OF

1 10%

VAR·'ATION
CHANGE
FROM

ONE

LEVELS
10

MEGOHM

RESPECT

DC

VOLTAGE

YELLOW.)

NARRQWER
TIFIES
TIFIES

RESISTOR

THIS

OF
THESE

COMPONENTS

MENT

TO

COMPONENTS

LECTED

AVERAGE

DENOTES

NOTES

9.

8.

~DENOTES

A

7.

*

6.

.,.

5.

CONNECTOR.

TERMINAL

BETWEEN

LESS

FOLLOWS

Y

AnE

CONNECTED

NO

DESIGNATION.

TO

CIRCUIT

OR

THAN

UN·

DESIG·

SHOWN.

SCHEMATIC

PIN

ON

PRINTED

GROUND

CONNECTED

WITH

MICROFARADS

SHOWN AS

SUflASSEMI3L

~UI

(PERMANENTLY

GROUND

EARTH

WIRE

GROUND.

IN

MILLIHENRYS

IN

IN

OHMS

ARE

FOR

COMPLETE

OH

OESI(;NATIONS

8

GROUND).

POWER

RECEPTACLE.

AND

18

GAUGE

FOR

TERMINALS

EARTH

INDUCTANCE
CAPACITANCE
RESISTANCE

NOTED.

VALUES

OR

BOTH

WITH

ASSEMBLY

nEFH,ENCE

FRAME
ASSEMBLY.
DENOTES

AC

TERMINAL
NO.
USED

J.-

DENOTES

LESS

OTHERWISE

COMPONENT

NATIONlS)
PREFI X

1.

PARTIAL

4.

3.

2.

r--------GENERAL

8-2192

STD

PIN

CONNECTION

StEMATIC

2

Section VII

ICH

OR

SUBASSEMBLY

~

~(j.....--'

/.-¢fI-~

A WHT/RED WIRE

MAy

~FEMALE

IS

I

ON
DENOTES

XA2

I

6 ) I

PI I

2,

MADE

WH

I

_

ASSEMBLY

NOT

BE

NUMBERED

MAY OR

PIN

CONNECTOR CONNECTOR ON

MALE

STANDrt,;;

A2AI)

)f---73~

QI

IS A2P/} I

+2.92V

WITH

R2

A2

OSC-I

DESIGNATOR IS

A2R4

VOLTAGE~

SUBASSEMBLY)

IS

A2AIRI

DESIGNATOR

COMPLETe

,-v(COMPLETe

SUBASSEMBLY OF

OESIGNATOR IS

TEST

IOOXXX-66501)

A2AI

PART

NUMBER

DESIGNATIONS

OR

BOTH FOR COMPLETE DESIGNATION

ARE SHOWN: PREFIX

f'I

~

I>Y

MAY

OR

OR

STAND-

[PHOTO:CHOPPER

AI

INDICATeS

R4

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R3

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DESIGNATIONS

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AND

I MAY NOT BE NUMBERED

TeRMINAL,

EYeLET

I

~

18

I

PIN

OF XA2 AND PI

I

~NUMBER

~

,-v6~U¥Jt

FIRST

SAME

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( 4

: I

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COD2THE

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OR

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THE RESISTOR

(COMPLeTE DESIGNATOR IS PI) I

ON

PI IS NOT MOUNTED : I

STRIP.

THE
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NUMBER

AS
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252787

San

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Sarah

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24932

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18

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93830

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545-250

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625

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450·975, 243-052

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168

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259,

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94

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424910/41

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AI.Khald'ya

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SpA

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833·4122,4121

Seoul
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4759

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KOREA
Mombasa

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BOl95221

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22201122301

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22639

Tel

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KENYA

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SABCO

Tel

24907/39907

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0485-24-6563

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052571·5171

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lid

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523·3624

Tel

06-304·6021

Osaka,
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232-2024

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03·331·6111

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29-21.

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511630

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(05t)402394

1·40132
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(081)

80131

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HewleU-Packa,d
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970291

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(095)

1-95126
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221079

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(Olt)

1-10133
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610514

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(06)

1-00143

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430315

Tel

(49)

35100
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20063
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33569.34164
Tet'

38973

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101)
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Cardiac
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30439

Tet

5143221514224

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Hewlell-Packard
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42027

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5820/16303

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Medical

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Telex'

041-379

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820S7

Madra.

133

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0155·459

Tet

70126

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32069

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55668

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65799

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682547

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23·0131

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Tel:

43922

Ahmedabad
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011-3751

Tel

457301

Bombay
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457887

Bombay
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INDIA
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74766

Tel:

5·455644

Hong

Kong

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lid

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36678

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3·69744615

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212

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11th

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lid

Hewlell-Packard
HONG KONG

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4192

66471-5,

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316627.314786,
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9

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646-4513

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53 50

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France

692315F

0779660

Evry·tedex

de

France

France

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97

0181

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France

211032F

[phone]

CMex

Le

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300

delaCommune

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France

160124F

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890141F

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deIaMarne

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740912F

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514244

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deIaBOUfgonelie

France

41Q770F

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594102

Alx-en-Provence

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de

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E

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452-3670

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Tet

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Jod

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220222

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H.

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Ply

BIO

AR

221

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SA

50

50

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72

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ElectriC

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259958

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WAEL

Gesm.b

29

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6009

HIghway

Australia:

MRB

3130

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5063

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4000

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Australia

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660

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648

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82536

2725911

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Boundary

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The

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Amorsolo

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Medical

MUfl(Mter

InlercambloMundiaJde

ComerCIO

P.O.

AvenlOll

de

Aguiar
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Tel:

(19)532131/7

Telex:
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Tel:

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3450514

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16

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Box

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Place.

Province.

7450

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7405

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3

16

(1)

4582600

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hpe

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Blava.

13

34

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21·23

17

203

6200(5lines)

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planla

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06/238206

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Gordillo

1

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Place

2

1377METROLTOCE

Trade

921

Holland

N.V

3·5

155

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20

7300550
10721
MEASUREMENTS

Svenge

30

49

09

50

10721

via

Bromma

(Schwelzl

20
307
Schlieren-

7305240

53933

hpag

ch

HPAG

CH

(Schweiz)

Bloc

19

22

27333

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ch

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Geneva

lines)

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35947

Box

44048

375

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SYRIA
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P,O

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DAMASCUS

Medical
Sawah&Co.
Place
B.P.2308

DamaaeuB

Drive.

Tel:

16367·19697·14268

Telex'

Cable'
Swelman

PO

80x

Mamoun

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TeLlt4663
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Cable:

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Talwan
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Tun
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TANZANIA
Medical
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80x

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THAILAND

UNIMESA
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62·53068

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175622

YilmazOzyurek
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UNITED ARAB
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Tel'

354121/3

Telex:

ElectroniC

5781

87
112151TIKAl
ELECTROBOR

only

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11304

SATACO

SAWAH.

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2528

Bilar

Suee!.

11270
HILAL

DAMASCUS

Branch

Tower.

5lh

Hau

Nor1h

Branch

Chung Cheng

242318-Kaohsiung

InstrumenlsCo..

Sui

Road

22894

SANKWANG

Only

861

Exl.

265

41030

Co.

ltd

Research

Sukumvil

Ave.

Bangkok

&

Telecoms

732

Sireet

Eleclronique

Av.

de

Carthage

12319

CABAM

Company

Pehlevi

No,

7
Ankara

42155

Com.,

Ltd.

Bulvafl

23540

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Eidem

Sokak

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Cad

42576

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Ltd.

(Head

Box

1641

8136

Inc

Ebn

Far

Easll1d.

Floor

Road

(15

Far

3rd.

BUlldmg

Llberte

LId

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16/6

178026

Ollice)

Kays

SY

56-58

lines)

Eas111d.

Road

LId.

TN

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41/6

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(cont.)

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(BranCh

P.O.

Box

2711

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Tel:

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UNITED KINGDOM
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Tel:

(0734)

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Telex:8471

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High

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Tel:

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85034

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2424

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Box

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Brady

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little

Rock 72215

Tel:

[phone]

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1430

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5400

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Box

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World

Way

Pos!al

Los

Angeles

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970-7500

TWX'

910·325-6608

LId.

5AR

Ltd.

lid.

lNU

Ltd.

ltd.

lid,

LId.

LId.

lid.

Park

Only

90009

Dr.

SI.

Rd.

Center

Office)

8SD

9TG

Soulh.

Ave.

Blvd

3939

Lankershlm

North

Hollywood

Tel.

(213)

877·1282

TWX:

910·499·2671
HillView

3200

Palo

Alto,CA94304

Tel:

(408)

988·7000

W.

North

646

Sacramento
Tel:

(916)

929·7222

9606

Aero

Drive

PO.

Box

23333

San

Diego

Tel:

(714}

279-3200

Brookhollow

363

Santa

Ana, CA 92705

Tel:

(714)

641·0977

3003 Scoll

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Santa

Clara

Tel'

(408)

988·7000

TWX

910-338·0518

454

Carllon

Coorl

So. San

Francisco

Tel

(415)

877·0772

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Tel:

(213)

705-3344

COLORADO
5600

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Englewood
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CONNECTICUT
47

Barnes

Induslrral
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Tel

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Box

24210

2727

N.W

62nd

Ft.

Lauderdale

Tel'

(305)

973·2600

Woodcock

4080
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BUilding
Jacksonville
Tel:

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398·0663

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Box

13910
6177

Lake

Ellenor

Orlando

32809

Tel:

(305)

859·2900

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Box

12826
SUite5.Bldg.
OHice

Park

Norlh
Pensacola
Tel:

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476·8422

110

South

Hoover

SUite

120

Tampa

33609

TeL

(813)

872·0900

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Box

t05005

450

Interslale

Atlanta

30348

Tel'

(404)

955·1500

TWX:

810·766·4890

Medical

Service

•

Augusta

30903
Tel

(404)

736·0592

P.O.

Box

2103

1172N.Davis

Warner

Robins

Tel'

(912)

922·0449

HAWAII
2875

So.

King

Honolulu

96826

Tel'

(808}

955·4455

ILLINOIS
211

Prospecl
Bloomington
Tel'

(309)

663·0383

5201

TolJview

RoHing

Meadows
60008
Tel'

(312)

255-9800

TWX:

910·687-2260

INDIANA
7301

North

Shadeland
Indianapolis
Tel'

(317)

842·1000

TWX:

810·260·1797

IOWA
2415

Hemz

Road
Iowa

City

52240

Tel'

(319)

351-1020

KENTUCKY
10170

Linn

Sialion

SUire

525

Louisville

40223

Tel:

(502l426·01oo

LOUISIANA
P.O.

Box

1449

3229·39

Williams

Kenner

70062

Tel:

(504)

443·6201

Av

Markel

95834

92123

95050

80110

06492

$treel

Drive#132

32207

1

32575

North

Only

Drive

Slreet

Rd.

61701

Dr.

46250

Boulevard

91604

Blvd.

Dr.

94080

Road

33309

Or

Blvd.

Parkway

31098

Ave

Road

Boulevard

MARYLAND
7121

Slandard

Drive

Park

.....aylnduslnal

Hanover

21076

Tel:

{301} 796·7700

TWX:

710·862·1943

Choke

Cherry

2
Rockville
Tel:
TWX

MASSACHUSETTS
32
Lexington
Te'!:
TWX

MICHIGAN
23855
Farmington
Tel:

724
Tel.

MINNESOTA
2400NPnor

Tel
MISSISSIPPI

322N.Mart
Jackson
Tel

TWX

St.

Medical
7101
SUire

Tel

Tel:

Cryslal
Roule
Tel:

W,
Tel:

TWX:

P.O.
Sialion

Albuquerque

6
Computer

650

Road

20850

{30t} 948-6370

710·828·9684

Hartwell

Ave.

02173

(617)

861·8960

710-326·6904

Research

Drive

Hills

(313)

476·6400

Wesl

Cenlre

(616)

323·8362

(612l636·07oo

39206

(601)

982·9363

Colorado

City

(816)

763·8000

910·771-2087

Execullve

Louis

63141

(314)

878·0200

Only

Melcy

101

(402)

392·0948

Vegas

(702)

736·6610

Brook

Building

35

(201)

542·1384

120

Century

(20

I) 265·5000

710·990-4951

Box

11634
E
Lomas

(505)

292·1330

910-989·1185

Wyall

Drive

Cruces

(50S)

526·2484

91O·9983·0550

Au10malion

Park

12205

(518)

458·1550

710·444·4961

Pennlon

14450

(716)

223·9950

510·253·0092

Pennsylvania
Floor
Slreel&8lh

York

(212)

971·0800

East

Molloy

(315)455·2486

Crossways

(516)

921·0300

510·221·2183

1513)671·7400

Roanne

(919)

852·1800

Carver

(513)

891·9870

Sprague

[phone]

810-423-9430

Ave

49002

Ave.

Plaza

Ave,

64137

Parkway

Road

ProfeSSional

07724

Rd.

Blvd..N.E.

87123

88001

lane

Hill

OHice

10001

13211

Park
11797

Way

27409

Road
45242

Road

44130

Kalamazoo

SI. Paul55113

MISSOURI
11131
Kansas
Tel.

1024
Tel:

NEBRASKA

Omaha 68106

NEVADA
'LaB

NEW JERSEY

Eatontown

Paramus 07652

NEW MEXICO

11300
Tel:

TWX:
156

Las
Tel:
TWX:

NEW YORK

Albany
Tel:
TWX:

Fairport
Tel:
TWX:

NO.1
55th
34th
New
Tel:

5858
Syracuse
Tel:

1
Woodbury
Tel.
TWX:
Tel

NORTH CAROLINA
5605
Greensboro
Tel;

OHIO
MedicaVCompuler
9920
Cincinnati
Tel:

16500
Cleveland
Tel:
TWX.

Center

48024

Plaza

Avenue

Road

Wesl

Only

Park

9{l2

Crupper

Ave
Columbu.43229
Tel

(614)

436·1041

Progress

Rd.

330
Dayton

45449

Tel:

(513l859-8202

OKLAHOMA
P.O.

Box

32008
6301N.Meridan
Oklahoma
Tel:

9920E42nd
SUlle
Tulsa 74145
Tel'

OREGON

17800

Tualatin
Tel:

PENNSYLVANIA

1021
KingofPrussia
KingofPrussia
Tel
TWX

111
Pittsburgh
Tel:

SOUTH CAROLINA
POBox
6941·0N.Trenholm
Columbia
Tel:

TENNESSEE
8906
Knoxville
Tel:

3070
Drrectors
Memphis
Tel'

'Nashvllle
Medical
Tel:

TEXAS
4171
Suite
EI
Tel:

P.O.

10535
Houston
Tel:

'Lubboek
Medical
Tel:

P.O.
201E.Arapaho
Rlehard.on
Tel:

205
San
Tel:

UTAH
2160
Salt
Tel:

VIRGINIA

PO.

2914
Richmond
Tel:

Com
Airport

SUlle
5700
VirginIa
Tel:

WASHINGTON
BellelreJd

1203·

Bellevue

Tel:

TWX:
P.O.

Spokane

Tel:

'WEST

Medical/AnalylicalOnly

4604

Charleston

Tel:

WISCONSIN

150
Brookfleld
Tel:

(405)

721·0200

121

(918)

665·3300

S.W

Ferry

Road

97062

(503)

620·3350

81h

Avenue

(215)

265·7000

510·660·2670

Zeta

Dflve

(412l782·04oo

6442

(803)

782·6493

Kingslon

37919

(615)

691·2371

Directors

Square

38131

[phone]

Service

(615)

244·5448

North

Mesa

Cl10

Paso

79902

(915)

533·3555

Box

42816

Harwln

77036

(713)

776-6400

Selvlce

(806)

799·4472

Box

1270

(214)

231·6101

Billy

Milchell

Antonio

(512)

434·8241

Soulh

Lake

(801)

972·4711

Box

9669

Hungary

{804} 285·3431
puler

Sysrems/Medical

Only

Execulive

302

Thurs10n

Beach

(804j460-2471

OUice

114th

98004

(206)

454-3971

910·443-2446

Box

4010

99202

(509)

535-0864

VIRGINIA

Mac

Corkle

1304}

925·0492

Soulh

Sunny

(414)

784·8800

City

Lower

15238

29206

3270
City

23228

53005

Srree!

Indusillal

Pike

Row

Only

SI

Only

Rd

75081

78226

Spring

Avenue

Pk.

Ave.

25304

Avenue

Road

Center

73112

Boones

19406

Road

West

84119

Road

23455

S.E.

Ave.•S.E.

Slope

Park

Slreel

Road

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