HP 3484A Service and user manual

MODEL

3484A

MULTIFUNCTION

UNIT

OPERATING

AND

SERVICE

MANUAL

MODEL

3484A

MULTIFUNCTION

-hp- Part No. 03484-90000

Serials Prefixed: 975-

UNIT

Copyright Hewlett-Packard

P.O. B

ox

301, Loveland, Colorado,

Company

80537

1970

U.S.A.

Printed: JULY 19

70

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Operating

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United States}.

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trument

be

sure

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until

possible delivery

in a complete

and

Service Manual when

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ddressed

spaces

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Attention

Dept.

MANUAL

ce

Manual for Mod

REQUEST

el

No

.....

3 4

DDD-DDDDD

PLEASE

TYP

E (OR PRINTj

41\

8.

....

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BUSINESS

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BY

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COMPANY

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S T CLAS&

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-

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r

Model 3

484A

Table

of Con

tents

Section

l.

GENERAL INFORMATION

1-1 . Introdu 1-2.

Opti

1-3. Isolated Remote Option 041 . . . . . . . . . . 1-1

1-4. Ohms Converter Opti 1-5. True RMS Conv

-6

. Specifications

1 1-7. Instrume 1-8. Accessory Equipment Available . . .

Section

II

. INSTALLATION .......

2-1.

Introduction 2-2. Initial Inspection 2-3. In 2-4. In

2-5. In

III. OPERATING INSTRUCTIONS

3-

1.

Introduction ...

3-2.

Front

3-3. Functi

-4

. Range Selecti

3

3-5. Automatic Ranging ...........

3-6. Re

Sample Control

3-7. 3-8. Automat 3-9. Manu 3-

15. Remote 3-18. 3-

19. R 3-20. Standard Re 3-21. Isol 3-26. R

27.

Guard Connection

33-32. DC 3-33. Filter Selection 3-34. R 3-36. 3-37.

3-38. Resistance Measurements (Option

3-39. Filt

3-40. Response Time . . . . . . . . . . . . . . . . . . . . 3-6

41.

33-42. Measuring 3-43. Ohmmeter Current 3-44. 3-45. R 3-46.

ction

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

ons

........

....

nt

and

Manual Identificatio n

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

sta

llation . . . . . . . . . . . . . . . . . . . . . . . . 2

stallation

Option 041

st

allation

Option

and Rear Panel Descripti

mote

Inter emo

te Programming

at

emo

Voltage Meas

es

ponse Time

Mea

suring Speed

DC

Volta

er

Autoranging Time .

Low

esista

AC

Volta

of

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

of

042

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

on

Selection

on

Range Selection . .

ic

Sampling . . .

al

and Re

Tri

gge

face Ho

ld

mot

ed Remote Option 041

te Program Connection ........

ge

Mea

Selection . . . . .

Sp

eed

Resis

tanc

nce Measureme

ge

Measurements (Opti

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

.

...........

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

on 042

erter

Opti

on 043

.........

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

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

Isolated Re

Ohms Convert

...

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

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

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

mot ring

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

e Programming

.....

urements

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

....

.......

surement Pro

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

e Measurements

mot

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

. . . . .

.........

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

e Sample Control

Rat

e . . ............

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

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

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

..........

.

...........

....

..

...

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

nt

Procedure

..........

.......

.

.........

e

er

....

on

........

...........

........

..........

........

cedure

042)

...

. . .

.........

on 043) . . 3-7

TABLE

.... 1-1

...

.

.....

......

.

... 3-1

.

.....

....

..

. . 3-3

.. ..

....

. . 3-5

.

..

....

. . . 3-6

..

. . 3-6

.....

.. 3-6

.....

OF

Page

1-1

1-J

1-1

1 1-1 1-1

1-1

Page

2-1

2-1 2-1

-1

2-1

3-1

3-1 3-1 3-1

3-1

3-2

3-3

3-4

3-5 3-5

3-5

3-6 3-6

3-7 3-7

-1

CONTENTS

Section III.(Co

3-47. 3-48. 3-51. 3-52. 3-53. 3-54.

Section

IV. THEORY

4-1. 4-2. 4-3. 4-4. 4-5. 4-10. 4-11. 44-16. 44-23. 4-26. 4-27. 4-31. 4-32.

4-45. 4-49. 4-52.

Section

V. MAINTENANCE

5-1. In 5-2. Test Equipment Required 5-3. Performance Checks

-4

5 5-5. 5-8. DC Common Mode Rej 5-9. 5-10. 5-11. 5-12. 5-1 5-1

5-J 5-18. DC 5-19. 5-22 . 5-23. Servicing Information 5-24. Clean Handling Techniqu 5-28. Reed Replacement 5-31. DC Amplifier Assembly Repair

nt'd)

AC or

Maximum I

Response Time .

Measuring Speed

Auto AC

Introduction DC Circuits

I Feedba DC Variable Filt Manual

Functio

12. Ran

Aut

17.

Range Register

Range Register Decoding . . . . . .

R Manual Range Sel Delay Generator Circuits .

Isolated R Ohms/DC Converter Opti T

rue

troduction

. VDC Accuracy and Lineari

VDC Input Resistance Check . .

AC AC Ohmm V

3.

Adjustment Procedures

6.

DC

Adjustments

7. DC Amplifi

Ohm Tru

Ex

DC

Coupled Measureme

nput

Voltages .

..

. . .

...........

ra

nging Time

Voltage Measuremen t Procedure

OF

OPERAT ION

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

..

nput

Att

enu

ck

Attenuator

Amplifier

and

n Selecti

ge

Selection Circuits

ora

nge Control . . . . . . . .

emo

te Range Selection

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

emote

RMS

AC

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

..........

Common Normal M

eter Accuracy Check

AC

Accura

Amplifier Zero a

er

Att

enuator Adjustme

s Converter Adjustments(Option 042)5-7

e RMS

change

AC

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

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

.........

. .

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

ator

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

........

......

er and

Remo

on

Converter

Mode Rejection Check ....

ode

cy

........

Gain Adjustments

. . .

Filter Amplifier

te

Filter Selection .

Circui

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

ection ... . . . . .

and

Sample Control

Option 041

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

Rejection Check

(Option

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

nd

Converter Adjustments

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

...........

nt

...

. .

...

. .

...

. .

. . .

. . . .

...........

ts

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

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

...

..........

...........

on

042

........

Option

ec

043 .....

..

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

...

. . . .....

ty

Check

......

tion Check

........

043) .....

Off

set

....

.........

nt

. .

....

es

...........

and

.

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

....... 3-7

......

...... 3

......

....

.

...

.....

....

......

.....

...

.......

...

.

. . . . . . . 5-9

Page

3-7

-7 3-7 3

-7

....

3-7

Pa

ge

..

4-1

. . 4-1

4-1

....

4-1

. . 4-3

4-3

...

4-3 4

4-4

...

4-4 4

. . . 4-5

4-6 4-6

4-6 4-8 4 4-9

Page

. 5-1

5-1

...

5-1 5-1

....

5-1

..

5-2

....

5-3 5-3 5-4

...

5-5

. . 5-5

5-5

. 5-5

5-7

. . 5-7

...

5-8

.... 5-8

5-8

5-9

-4

-5

-9

iii

Table of Contents

Mod

el

3484A

TABLE

Section V. (Cont'd) P

5-34.

Troubleshooting 5-35. 5-36.

5-37. 5-41. 5-42. 5-47. 5-53. 5-56. 5-58. 5-59. 5-60. 5-61.

DC Amplifi

DCV Display Limiting ...............

DC

Amplifier Gain Errors

DCV

Reed Relay Checks

gi

ng Checks

Ran Delay Generator Chec Isolated Remote A

Ohms Conv

Factory Selected Components

DC

Amplifier A A6R7* . . . A6R25*

.......

er Zero Offset

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

ks .

sse

mbly, Option 041

erter, Option 042

sse

mbly A2

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

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

......

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

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

..........

...........

..

..........

........

OF

CONTENTS

age

5-10 5-1 O 5-10 5-10 5-11 5-11

..

5-11

.. 5-1

5-13 5

-14

5-

14 5-14 5-

14

LIST

Number

1-1 . Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

3-1. Delay and Response Tim

3-2. Interface Signals . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3-3. Ohmmeter Current

DC

Volta

ge

Ran

4-1.

Logic Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

4-2. 4-3. Range Register Content

ge

es

..

.......

Relays . .

....

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

......

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

. . .

......

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

Page

....

. . . 3-6

3-2

4-

4-5

(Cont'd)

Section Pa

VI. REPLACEABLE PARTS . . . . . . . . . . . . . . . . . .

6-1. introduction 6-4. Orderi 6-6. Non-Listed Parts .

Se

ction P

VI

I. CIRCUIT DI

3

OF

TABLES

-2

1

-2

7-1. Introduct ion 7-2. Not

Appendic A. CODE

B. SALES

Number

5-1. Required T 5-2. 5-3. Ohmmeter Accuracy Check 5-4. DC 5-5. 5-6. Delay Timing . 5-7. Ohms Converter Reed Relay Checks 6-1. Re

es

DCV Accuracy a

Amplifier Gain Errors

DCV

pl

aceable Parts

AGRAMS

es

LIST OF MANUFACTURERS

AND

est Eq

Recd Relay Checks

...........

ng

Information

.......

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

......

...........

SERVICE OFFI

uipment

nd

...

......

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

Linearity Check

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

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

....

...

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

....

..........

...........

........

.

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

CES

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

......

........

......

. .

......

..........

........

..........

.

Pa

5-10

. . . . 5-12

..

5-13 5-15

. . .

...

6-1 6-1

age

7-1

5-0

.

5-2 5-5

6-2

-

ge

7-1 7-1

ge

LIST

OF

ILLUSTRATIONS

Pa

...

ge

I -1 2-2 2-3 2-3 3 3-2 3-3 3-4 3-5 4-1 4-3 4-4

4 4 4 4-8 4 4-9

5-1

5-3

Number 1-

l.

Model 3484A Multi

Plug

-in

2-l.

2-2. Isolated Remote Option Installation . . . . . . . . . . .

2-3

. Location

3-1. Front and Rear Panel . . . .

3-2. External Trigger Connections 3-3. Remote Connector JJ4 3-4. Isolated Remote

3-5. Guard Connection . . . . . . . . . . . . . . . . . . . . . . . . .

4-1. Simplified Block

Sim

4-2. 4-3. Autoran 4-4. Simplified Range R 4-5. Remote Selection of Highest Ran 4-6. Delay Generator Block 4-7.

Del

4-8. Isolated Remote Program Circu

SimpUfied Ohmmeter Diagram

4-9. 4-10. True RMS Converter Block Diagram

1.

VDC

5-

5-2. Input Resistance Check . . . . . . . . . . . . . . . . . . . . . 5-2

5-3.

DC

5-4.

AC

5-5.

AC

Draw

of

plified Diagram,

ge

Control Circuits . .

ay

and External Tri

Accuracy Check

Common Mode Rejection Check

Common Mode Rejection Check . . . . . . . . . . . 5

Normal Mode Rejection Check . . . . . . . . . . . . 5

fun

ction Unit .

er Installati

Switch Limit Stops

on

and Removal

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

...........

Program Sequence

Dia

gram ...........

DC

Amplifier

egis

ter Diagram ......

Dia

gram

gger

Gating

...

. .

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

.........

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

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

....

.....

........

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

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

ge

...........

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

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

it

.......

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

...........

.......

......

...... 4-5

......

Number 5-6. Location

5-7.

Co 5-8. Reed Removal and Replacement 5-9.

DC

5-10.

-0

DC

5-

11. Ohms Converter Resistances

5-12.

DC

5-13.Limi 5-14.Autoran

6-1. Location

Schematics and

7-

1. Location

-6

7-2.

Blo

-7

7-3.

DC

-8

7-4. Ranging Circuits 7-5. Function Circuits

-9

7-6. Isolated Remote 7-7. Ohms Converter Option 042 7-8. Connections to

Asse

Plug-in Connect

7-9.

-4

Co 7-10.Ground Connections

of

Adj

ustments

mponent Replacement

Amplifier Diagram

Amplifier Input Connections

Zero Offset Troubleshooting Tr

te

d DC Dis

pla

gc

Troublesh

of Miscellaneous Parts

Diagram

of

Ass

emblies . . .

ck Diagr

Attenuator a

nn

am

mb

ly

A3

ector 114

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

nd

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

Option 041

Ran

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

or

...

....

.........

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

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

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

..........

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

ee

y Troubleshooting Tr

oot

ing . ...............

......

s

...

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

Amplifi

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

ge

Pl2 and Remote

er

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

...........

and Function

. .

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

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

......

.......

ee

...

....

..... 7-13

.

......

..

...... 7-19

Pa

. .

..

. . 5-17 .. 5-19

5-2

...

6-12

..

7-

. 7-15 . 7-17

ge

5-6 5-8 5-9

5-

11 5-13 5

-14

7-2 7-3 7-5 7-7

7-9

11

-;

l

1

-

iv

Model

3484A

SECTION

Section

I

GENERAL

1-1.

INTRODUCTION.

The ·hp· Model with

either makes 4-digit de vo overrange capability. Full scale ranges IOOOmV, manually , and

display arc

al

so

may true rms ac voltage measurements 042

and

043

1-

2.

OPTIONS

1-3.

ISOLATED

Opti

on

041 provides re which are isolated All

external connections arc referenced

lin

e)

gro

und.

-

hp

- Model 111

041 c

annot be

with Isolate

1-

4.

OHMS/DC

Opti

on

042 measurements 100

kS1, overrange capability. automatically, installation as -hp- M

Assembly.

1-

5.

TRUE

Option voltage measurements on five ranges

043

3484

A Multifunc

the

Model 3480A or

lt

age measurements,

lOV,

IOOV, and

automatically,

automatic.

be

selected

are

manually o r remotely. Resistance

added.

.

REMOTE

from the Model 3484A

This o

ption

51

A, I

solated Remo

used unless the Model

d BCD

Output

CONVERTER

allows the M

on

six ranges

1000kS1, and

or

RMS

allows the Model

JOMS1 full scale ,

Ran

remotely.

ode

AC

CONVERTER

tion

Unit, in

3480

B Digital Vol

with

IOOOV

or

remotely.

The degree

OPTION

mote programming

is available for field installation as

Opti

on

004.

OPTION

odel 3484A

of I 00

ge

may

This opti

l l l l

52A, Ohms/DC

may

Polar

of

may

be

041.

to

te Assembly. Opti

3480

042

to

n,

be selected manually,

on

is available

OPTION

3484A

of

to

100

make

conjunction

tmete

up

to 50%

of I 00

ity

filtering desired

made

connectio

int

ernal circuits.

chassis

A/B is equ

m V,

be

selected

selecti

if Options

(power

ipped

on

and

.

make

resistance

1000

n,

10

kS1,

with

up

to

50%

for

field

Converter

043

.

true

rms

m V,

1000

m Y,

INFORMATION

J

OY,

l OOV,

overrange capability. Ran

r,

ns

on

ac

automatica

stallation

in Assembly.

1-6. S

Comp combination

1-7.

Hewlett-Packard uses a two-section serial first section (serial instrument

this

define Model numbers

the instrument

1-8.

1-9. The M the fac

ili

1·10. The Model feet Jong which Jl4.

1-11. For

ment, contact

listed in Appendix B.

lly,

as -hp- Model

PECIFICATIONS

lete specifications for

INSTRUMENT

does

man

ual, change sheets

the

differences between

3484

may

number.

was

ACCESSORY

plug-in

tate

servicin

and

mates

The other

additio

and

IOOOV full scal

or

remotely. This

ge

11

may

I 53A,

e,

with

up

be selected manually,

opt

ion

is

available

True

RMS AC Convert

to

for field

.

the

Model

3484A

and

3480A/B

are

given in Table 1-1.

AND

MANUAL

prefix)

not

A described

have a

This l

ette

manufa

of the serial

agree with

supp

in

letter

separating t

r indicates

ctured.

this manual. Some serial

EQUIPMENT

ode

l 1 I I

48A

Plug-in

unit

to

operate outside the

g.

1114

9A R

emo

is ter

minat

ed

at

with

the

3484A

end

of

the

nal

inform

your nearest -hp- Sales an d Service Office,

rear panel

cab

le is

ation regarding

IDENTIFICATION.

number.

those

lied

with

your

the count

number

on

the

instrument

he

ry

title page

manual will

two

sect

in which

on your

and the

ions

AVAILABLE.

Extender

te Programming Cable is 6

one

end by a conn

unterminated.

Cab

3480

remote

optio

le

A/B

connector

nal equip

50%

er

If

th

e

of

the

allows

to

ecto

r

-

34

114

A

MU

FUNCTION

SAMP~ RATE~

LTIFUNCTION UNIT

HOU).Jli'

Figur

e 1-1. M

RANGE

T111a

ZCRO

@ •

odel 3484A

FILTER

Multifunction

TE

RMINAL

Unit.

1 -1

Section I

The

following

Full

Scale Voltage Ran

specifications

DC

VOLT

S

ges

app

Model

3484A

Tab

le 1-1.

Specificat

ly

to

the

Model

3484A

Multifunction

ions.

Unit

100

used

mV,

in

1000

the

Mod

mV,

10

el

3480A

V,

100

/B

Digital Vol

V,

1000

tmete

r.

V

50% Overrange

maximum

Range

Selection

Automatic

Polarity

Vo

24

90

Measurin

Sel

ltage A

ccuracy

hours

(23°C ± 1°c,

relative

humidity)

days

(25°C

relative

humidity)

Temperature

o0c

to

55°c

g Speed

Read

ing

Period

capability

input

± 1

Ranging

ection

± s

Coefficient

200

V.

and Disp

less

0

c, less

on

all ranges;

lay

than 50%

than 95%

Manual, Upranges

Down

Automatic

100 All

All other ranges:

950

ranges

± (0.01%

mV

±

(0.0

other

±

(0

100

mV

Filter

+

0.0005

Filter A or

+ 0.

± (0.001 %

microseconds

Automati

at

140% of

at 10%

of

reading + 0.01%

Range:

1 %

of

ranges:

.01%

of

Range:

Out

: ± (0.001%

% of

B:

0015%

of

c,

or

Remote

range

of

range

of

ran

ge)

reading + 0.02% of range)

readin

g+

0.01%

of

range)

of

range)/°C

± (0.001%

of

range)/°C

reading+ 0.

reading

of

reading

0005% of

range)/

0

c

Reading

Automatic

Manual

External

Response

Autorange

Rate

Trigger

Time

(without

range change)

Vari

able

front

Front

0

to

1000

Without

Filter

reading input

Filter

reading

Filter

reading

Fi

lter

Fi

lter

Filter

from 1 to

panel

range change:

out

: 1 msec when

voltage.

A :

200

B:

1 second

out: A :

200

B:

1 second per range change

25

l

to

triggered

msec

to

msec

per

per second

within 1 count

coincident with

within 1 co

range change

contro

pushbutton

per second

4 msec per range change

with

unt

of

final

step

final

1

1·2

Model

3484A

Tabl

e 1·1. Specifications (C

ont'

Section I

d).

DC VOL

Input

Characteristics

Inpu

t Resistance

Ef

fective

(Ratio

lt

ant

resu unbalance

DC

AC

Normal Mode

(Ratio resultant

Filter

Selection

Zero

Offset

Voltage

temperature)

Voltage

(0°c

Current Current

10°c

TS

(Cont'

Common

of

Stability

Temperature

to

peak

common-mode

error

in

either

Rejection

peak

normal-mode

error

in reading)

ss0c1

Mode

readi

(at

12s0c ± s0c1

Temper

atu

0

to

ss

ci

di

Rejection

ng

with 1 kilohm

lead)

constant

Coefficient

re

Coefficient

voltage to

signal

to

100

mV,

1000

than

V ranges:

80

Hz

Greater

dB

10

microvolts

± 1

microvolt

10

pA

mV 101 ohms

dB

per

Greater

100

V, 1000

Greater than

50

to

60

Filter

out:

Filter

A : Greater

Filter

B:

Filter out: 0

Filter

A : Greater

and above

Filter

B: Greater than

and above

Manual or Remote

Less

than

Less

than

L

ess

than 1 pA

8nd

10

than

than 110

than

1

60

than

30

80

per

0

c

V ranges: megohms±

80

dB

at

dB

at

week

0

c

50

Hz

50 Hz

0.1%

Noise

Maximum

Between Between Between

Input Voltage

HIGH

and LOW GUARD

LOW

and

GUARD terminals

and

terminals

Chassis

L

ess

than

20

(unfiltered).

ess

l time approximates a Gaussian

where the standard

equals 5

± 1

200

±

200

±

500

microvolts pea

than

Peak-to-peak noise is

20

microvo

since the noise

microvolts.

V peak

k-to-peak

lts 95%

amplitude

distribution

deviation

of

(rms

the

value)

1

-3

Section I

Model 3484A

OHMS (OP

Fu

ll

Scale Ran

50% Overrange

Range

Automatic

M

easureme 24 hours

relative

90

days 12s0c ± s0c, less

relative

M

easuring

Reading Period

Reading Rate

ges

Sel

ection

Rangi

nt Accur

(23°C ± 1°c. less

humidity)

Speed

(Without

TION 042

capability

ng

acy

)

on

all ranges

than

50%

than

95%

range change)

Table 1·1.

Specifications.

100

Manual,

Upranges Down

1000

100 10

1000

100 10

950

(Cont'

d)

ohms,

1000 kil

+ 0.01%

1000

ohms

Automatic,

at

ranges

ohm

thru

of

ohm

range: ±(0,.02%

megohm

ohm

thru 1000

of

ohm

range:

megohm

microseconds

ohms,

10 megohms

140%

of

at

10%

1000

range)

range:

±(0.

range)

±(0.02%

range:

±(0.

10 kil

or

Remote

range

of

range

kilohm

1%

kil

ohm

1 %

ohms,

100

kilohms,

ranges: ± (0.01%

of reading+

of

ranges:

of

reading+

of

0.05%

reading+

reading + 0.01 % of range)

0.0

1% of range)

±(0.02%

0.05%

of

range)

of

range)

reading

readi

ng

·r

Au

tomatic

Manual Trigger External

Response

range change)

Autorange

Inpu

Vo

Maximum current

Trigger

Time

t Characteristics ltage across

(Fu

ll

scale step

unknown

through

input,

resistance

unknown

without

resistance

Va

riable

from 1 to

Front

panel pus h

0

to

1000

per second

100 ohm t hru

with

in 1

1000 kil

of

10

of

Note: Due

filtering greater than 1 fu shown.

Filter Filter Filter

1 V

10

count of final reading

ohm

final

reading

megohm

fina

l reading

to

may

ll

sca

le, wit h filtering, are

out

: 4 msec per range change

A :

200

B: 1 second

at

full

sca

mA

on

100

25

per

second

butto

n

100 kil

ohm

ranges (Filt

range

(Filter A):

ran

ge (Filter A): 2 seconds

noise generated

be requ

ired

00 kilohms. Response

msec

per

le

on all

ranges

ohm

range

200

in

for

quiet

proportionately

range change

with

front

panel con

er

out

): 1 msec

msec to within 1

to

within 1 count

the

unknown

readings wi

times for in

tro

count

resistance,

th inp

uts

puts

less

than those

to

bel

l

-

ow

14

Model

3484A

Section I

AC

(OPTION

Full

Scale

Voltage

50% Overrange capabi

maximum

ranges;

Sel

Automat

ion

to

Volt

Hours

ection

of

150%

-Hertz)

ic Ranging

AC

of

(23°C ± 1°c, less

humidity

Range

Response

Select

Accuracy

(

10"!6

108

24 50% relative

VOLTS

Ranges

inpu

or

DC

range;

043)

lity

on all

t 1

500

Coupling

less

V peak

than

Table 1-1.

1

00

mV,

1000

Manual

or

Upranges

Downranges

Responds

Manual

20 +

signal.

Hz

0.02%

at

to

(Internally

or

to 1 MHz:

of

Specificatio

AC

VAC

mV,

Remote

140% at

1 0%

true

Remote

range)

COUPLED

(AC)

10

V,

of

range

of

range

rms

value

ac

coup

±(0.05%

ns.

100

of led)

of

(Cont'd)

V,

1000

ac

input

reading

V

100

Manual Upranges

Downranges

Responds

Reading = With

Manual or Remote

DC:

1 Hz

10

20

DC

COUPLED

VAC

(DC)

mV,

1000

mV,

10

or

Rem

ote

at

140% of range

at

10%

of

to true rms value of ac and de

input

signal.

2

V!DC)

external 10 capacitor, responds on

ly, for measurements

± 0.1%

to

10

Hz: ± 1%

Hz

to

20

0.05% of range)

+

Hz

to 1 MHz: ±(0.05%

microfarad

of

range

Hz:

(ACrms)

+

±(0.

+ 0.02% of range)

V,

100

V,

range

2

coupl

to

ac

component

down

to

of

reading

1% of reading

of reading

1000

ing

1 Hz.

V

90

days

(25°c ± 5°C.

than 95% relative

Measuring Speed

Reading Period Reading Rate

Automat

Manual Trigger

External

Response

without

Autorange

Input

Crest

Maximum Input

ic

Trigger

Time

range change)

Time

Characteristics

Resistance

Factor

humidity)

(without

(Full

Voltage

less

range change)

scale

step

input,

20

Hz

to

1 MHz: ±:(0.05%

0.05%

of

+

950

microseconds

Variable

with

Front

0

to

1000

1 second

reading

1 second

2 megohms ± 1%

7: 1 at 70: 1 at

1

500 10 Vdc 100

Vdc

1500 V maximum

range)

from 1 to

front

panel

pushbutton

per second

to within

per

range change

full

sca

le

10%

of

V peak ac

(100

mV

(all

othe

25

control

5 counts

full

scale

rang r ranges)

ac

of

per second

of

e)

+de

(peak)

reading

final

DC: ± 0.5%

1 Hz 10 Hz

0.05% of range)

+

20

Hz

0.05%

+

950

microseconds

Variable

front

Fr

ont

0

to

15

seconds

reading

3 seconds per range change

2 megohms ± 1%

7:1

at full

70

: 1

1

500

1

500 Vdc

1

500 V maximum

of

to

10 Hz: ± 1%

to

20 Hz: ± (0.1%

to 1 MH

z: ±

of

range)

from 1 to

panel

cont

panel

pushbutton

1000

per second

to

within

sca

le

at

10%

of

V peak ac

range

rol

full

ac

of

reading

(0.05

% of reading

25

per second

5 counts

scale

+de (pea

of

reading

with

of

final

k)

1-5

Section I

Ratio

(3480A/B

Display is

voltage, reference voltage applied

Ratio

(+

Ratio

In

put

In

put

Ratio

Rat

Option

proportional

or

accur

acy

10

Vor + 100

s

pecifications

10 V

or + 100

- 5%

to

bas

ic

accuracy specifications.

(Reference) Input

Voltage

common

Resistance: 10 V Ref 1

00

V Ref Range =

Measurement Sel

io

Range Selection : Manual

0021

to

resistance

- 13% Reference

: + 10 V

and

Range • 1

the

to

the

to

V)

± 5% reference

for

basic function

VI

+ 5%

Characteristics

Low sid

or + 100

e of

00

kilohm

100 kilohms ±

ect

ion

ratio

of the

external +

rear panel Rat

input: Same

.

to + 35% or(+

input:

Add

V referenced

unknown

: Manual

input

s ± 1.5%

0.5

or

input

10

Vdc

io

termina

10

± 0.

.

%

Remote

de voltage,

or

+ 1

ls.

as

accuracy

V or +

02% of

to

ac

00

Vdc

100

VI

reading

circuit

General Sp

Operating

St

orage

Options and

Option

(Requires

Option

Other

Accessories

Plug-

plug-

Re

mote

in

ecificat

ion

Temperature

Accessories

041,

Isolated

3480A/B

042,

Ohms

043, True

in

Extender

in

unit

s)

Program Cable

unit

s)

s

Available

Converter

rms

Availab

Cable

0

: o

: -

40°c to+

Remote

Option

AC Conv

le

(for

(fo

r all

c

to

55°C

Control

0041

erte

servicing

plug

75°c

r

·

Model 3484A

Model

11151A

Model 11152A Mod

el 11153A

Model

1114

8A

Model 1114

9A

-

1-6

Model 348

4A

Section

Il

INSTALLATION

2-1.

INTRODUCTION

This section contai ns informati essary for installin g the Model 348

·the M

ode

l 3480A/B Digital Voltmeter. In addition, in-

struct

ions are given for installing t

th

e 3484A. This section also includes initial inspection

procedures a

2-

2.

This ins and electrically before shipme mars or scratches and receipt. To spected fo r physical damage performance

Pa

ragraph S-3 . If there is damage or deficiency, see the

in warranty inside the fro

2-

3.

nd instructions for repackaging

INITIAL

trum

INSPECTION

ent w

con

sho

INSTALLATION.

.

on

and

instr

4A Multifun

he

cti

available options in

for shipment.

.

as carefull

firm this, the in s

uld be tested using the procedu

y in spected both mechan ically

nt.

It

should be free from

in

perfect electrical order upon

trument

in

tran

sit, and the electric

nt cover of this manual.

should be in-

uctions nec-

on Unit

re outlined

SECTION

in

al

II

CLEAN GLOVES THE INS

c. Remove the sma

tta

cable a on the top side

th

e instrument.

of

d. Ho

ld the Isolated Rem

possible to the position it will occu

4A and insert the small printed circuit board

348 into

printed circuit connector

e. Insert

f.

th

mb

th

e 3

ibl

ly into

484A

Asse

If

installed, remove hold down screws and converter assembl y so th access

RUBBER

WHEN

TRUMENT

ll

printed circuit board, having

ched, from printed circuit conn

of

the master board, near the rear

e other

e.

end of the Isolated Remote

con

nector JS

has

Opti

OR

WORKING

.

ote

Assembly as near

on

on 043

true rm

at

the master board is

COTTON

WITHIN

ect

or

py

in the

J4. See Fig

the master board.

ur

e 2-2.

s ac converter

tilt the ac

JS

as

Instru

ctio

ns for installing the Model 348 Digital Vo in

structions for the Model 3480A/B are given

348

2-4. OPTION

Th

e followi Model the having Isolated Remote, Isol Assembly by reversing the

ltm

eter are given in Figure 2-1. Installation

0A

/B Operating a

nd Service Manual.

INSTALLATION

041

.

ng

proce

dur

e giv

111

SI A Isolated Remote Assembly (

348

4A.

If

it

is desired to operate remotely a 348

in

ated BCD

a. Visually ch

b. Remove

Opti

on 004, r

in

eck

the assembly

mo

lded coils offset

ar

e adjacen t to and aligned wi

th

er board. See Figure 2-2.

o

348

4A

top and bottom

OF

es ins

a 3480A/B t

emo

stallation procedure.

from one printed circu

4A

in the 3480A/B

ISOLATED

tru

cti

ons

for installi

Opt

hat

does n

ve the Isolated Remote

to

make sure

th the coils

guard covers.

MANY COMPONENTS AND

W

ITHIN THE 3484A SHOULD

TOUCHED. DIRT

CAN CAU

WHICH

A

TION

WILL

OF

THE INS

OR

FINGERPRI

SE CONTAMINATI

DEGRADE

THE

TRUMENT. WEA

REMOTE

ion 0

that th it boa

ARE

AS

NOT

BE

NTS

ON

OPER

in

the

ng the

41)

in

4A

ot haye

rd

on the

-

R

g.

Secure the Isolated Remote Assembly a screw through the master board

th

e Re

mot

on 6-32 x

1/4

kwasher, -hp· Part No.

loc

h.

Replace ac c

i. Replace top and bo

2-

5.

INSTALLATION

042

.

a. Remove 348

e

W

EAR

GLOVES

THE 3484

ON CUIT PERFORMANCE MENT. BE ANY

b. Insert Ohms Converter printed circuit board into

connector J6 and secure at opposite e sc

rews p with ex 236

0-0ll

e Assembly. This screw should

pan

hea

d pozidriv machine screw with

236

0-0113.

onv

ert

er

assembly.

tt

om gua

rd

OF

OHMS

CONVERTER

4A

top gua

CLE

WHE

A.

THE SWITCHES OR

BOARD

PRESSURE

rov

ided. (6-

te

rnal tooth Jock

S)

rd

cover.

AN

RUBBER

N W

ORKING

DIRT

OR

S WILL

OF

CAREFUL

TO

32 x S/

FINGERPRINT

PRINTED

DEGRADE

THE

NOT

REED

16 pan head pozidriv

washer, -hp- Part N

into the

covers.

OR

COTTON

TO

RELAYS.

by inst

OPTION

WITHIN

CIR THE

INSTRU

APPLY

nd

with two

aJU

ng

spac er

be

S

·

-

o.

a

2-1

Section

I.I

INSTALLATION

Model 3484A

-

With

3480A

latch

/B

Sl

ide

drawlf

in

until

latch

is

about

place

two·thirch

il

.

in

fully

open

position

, insert

drawer

PRE

SSTO

into

REMOVAL

RELEASE

Press insert

front surftce

ed

and

latch

of

snaps

latch unt

into

draww

closed

is

.

fully

-

2-2

Prm

3481A-C-

down

30272

on

top

surface

of

latch to

Figu

release

re

.

2-1.

Plug-in

Swing

3480A

Drawer Installation a

-----------

latch

/ B

nd

Removal.

downward

end

slide

drewer

out

of

Model 3484A

L

Section II

c. Route input lead from

outer

row

of

right-angle pins

to

Att

connect indicated

enuator Assembly

in

Figure 7-3,

Figure 2-2. Isolat

Oluns Converter under

of

connector

Al

Component Location

ed

Remote Option Installation.

J2,

and

at

point

drawing.

d.

Turn RANGE switch fully clockwise

range. Remove knob

by

loosening the two set

to

100 mV

screws.

nut

e. Remove RANGE switch mounting

fully slide the switch rear

of

the

instrument.

f.

Rotate

the

counterclockwise limit

position counterclockwise

as

far

as

possible toward

as

indicated in Figure

and care-

stop

one

the

2-3.

g.

Replace switch carefully so

that

stop

stays in

position. Replace mounting nut.

h. Install new RANGE knob supplied. Orient knob so

that

100 n range

is

opposite marker

on

fro

nt

panel and secure with two set screws.

i.

Four wires from RANGE switch are connected pins labeled A, B, C, 0 near front center bottom wires board. Make certain

to

side

of

printed circuit board.

the set

of

pins farthest from front edge

Mov

that

wires are kept in the

to of

e all four

of

same order.

J4

j.

Set FUNCTION switch

k. Remove

carefully slide the

l.

Rotate clockwise limit

as

FUNCTION switch mounting

the

rear

of

the

instrument.

shown in Figure 2-3. Make certain

counterclockwise the

AC

Converter option is also being added, this

stop should

be

to

switch

as

stop

is in the correct position.

rotated

two

SMALL

Cl

VOC

PRINTED

RCUIT

BOARD

WITH

CABLE

and remove knob.

nut

and

far

as

possible toward

one position clockwise

that

the

positions counter-

clockwise.

m.

Replace switch carefully so

that

stops stay

position. Replace mounting nut.

n. Two

FUNCTION knobs are supplied with Ohms

Converter Option, Model l l l 52A. -hp- Part No. 5060-5953 should be used have ac converter , and Pa

if

instrument does not

rt

No. 5060-59 54 if instrument does have ac, or if it is also being installed.

so

Select and install correct knob, orienting

that

voe

is opposite marker on front panel.

Secure knob with two set screws.

o.

Replace

top

guard cover.

p. Perform Ohmmeter Accuracy Check given in

Paragraph 5-11.

If

in

COUNTERCLOCKWISE

STOP

POSITION

Without

Ohms

With

Ohms

--

-;>..-~

®

RANGE

SWI T

CH

~

W

ith

Ohms?<=--'<

With

out Ohms Without

CLOCKWISE STOP

POSITION

Figure 2-3. Location

FUNCTION

With

AC

COUNTERCLOCKWISE

STOP POSITION

of

Switch Limit Stops.

SWITC

H

.__._

....

/

COUNTER

'484A-ll

CLOCK WISE

- 3 038i

2-3

Section

2-6.

2-7. repackagi graph not. If you h Sales locations.)

II

REPACKAGING

The following paragraphs contain a

ng the

2-8

if the original contai ner is to be used; 2

ave

and Service

FOR SHIPMENT

instrument for shipment. Refer

any questions, contact your nearest -hp·

Offi

ce. (See Appendix B for office

.

gene

ral guide for

to

Para-

-9

if it is

Mod

el 3484A

2-8. Place instrument in o priate packing mate metal bands. Jf original container is be purchased from your nearest -hp· Sales and Ser Office.

2-9.

If

original container

follows:

rial

riginal

container with appro-

and seal

well

with strong tape or

not

is

not to be used, proceed

avai

lable, o

ne

can

vic

e

as

NOTE

If the instrument Hewlett-Packa attach a tag to the instrument identifying

the owner and indicating the servi

repa

ir

to

be model number and the instrument.

identify the instrument by model number

and fu

ll ser

ial

is

to

be shjppe

rd

for serv

accomplished. Inclu

In

numbe

ice or repair,

full

serial numb

any co

r.

rres

pondence,

d to

ce

or

de the

er

of

a. Wrap instrument in heavy paper or plastic before

pla

cing

in

an inner container.

b. Place packing material around

ment and protect panel face with cardboard strips.

c.

Place instrument and inner container in a heavy carton or wooden box and seal with strong tape or

metal bands.

d. Mark

shippin

MENT

," "FRAGILE," etc.

g container "DELI

all

sides of instru-

CATE INSTRU-

2-4

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Section III

lrl.loUIO

Model 3484A

-

,.....,

~I

UOV

N~

1

~

•a

•II"""

.OVll

MU

,

~

...

r;~·1J.

I I

lt'@

HD/

@

t.0

Ml

Power

1.

2.

3.

4. Sample Rate

5.

6.

7.

8. Fil

9.

switch.

Function swit

Sample Indicator. Flashes once

to

25/second,

position.

Range sw

Manual Trigger

time

each

Front

sho

rted

ter

Front Inp

itch

.

pushbutton

Panel

Zero.

.

switch

.

ut terminals.

ch.

Contro

or

stops sampling when placed

Pushbutton. Instrument

Adjust

...

T·--

for

each sample

l. Varies sample rate

is pr

essed

and released.

disp

lay

to

zero

----

•

period.

from

1 /second

in

HOLD

samples once

with

Input

10

@@

Terminal swit

10

.

11.

Rear Input

12

. R

emote

Samp

1

3.

'Ratio

of

Rat

14. Ratio input

15.

Ratio

Power

16

.

17.

11

5/23

voltage

BCD

18

.

" 1"

ch. Selects front

terminal

s.

connector.

ling, Filter. or

mode io

mode

Range

range

Reference I

I

nput

0 switch. Sets 3

to

be used.

Output connector. Prov

state positive (

Allows

switch.

(3480A/B

switch.

(3480A/B

nput

connector

3480A/B

Ratio Permits manual

Selects

Option

terminals.

.

480

or

remote

mode

(3480A/B

Option

10 V or

002).

A/B

to

ides BCD out

Option

@

rear

inp

ut terminal

control of

or

remote selection

002).

100

V reference

correspond

003

or 004).

s.

Range,

Option 002).

to line

put,

1-2-4-8,

-

3-0

Figure 3-1.

Front

and Rear Panel.

Model

3484A

Section III

-

SECTION

OPERATING

3-1.

INTRODUCTION.

The information contained in this section applies operation the Model ing topics are presented:

3-2.

Figure 3484A tion are the same as the physical configuration

3-3.

Function may be selected either manually

When the FUNCTION switch

OHMS, V AC(AC), the appropriate pin

remote selection

the

given

Connector

of

the

Model

3484A

3480A

Front

and Function Selection Range Selection Sample Control Remote Programming

Guard

Connection

DC

Voltage Measurements Resistance Measurements AC

Voltage Measurements

FRONT

3-1

installed in a Model

of

controls

FUNCTION

VDC function. Remote programming instructions are

in

Paragraph 3-19,

114.

or

34808

Rear Panel Description

AND

REAR

shows front

and

indicators. The Model

3480A of

SELECTION

or

V AC(DC)

on

is

made,

Multifunction Unit

Digital Voltmeter. The follow-

Paragraph No.

3-2 3-3

3

-4

3-7

3-19

3-27

3-

32

3-38

3-46

PANEL

and

the

DESCRIPTION

rear panel views 3480A

, giving a

34808

except

instrument.

for the difference

of brief

.

or

is

set

to

REM, selection

may

be

made

by

Remote Connector

the

3484A

and

Figure 3- 3 shows

automatically selects

Jl4.

the

in

either

.

the Model

descrip-

controls

remotely.

grounding

If

Remote

Ill

INSTRUCTIONS

3-6.

REMOTE

When the RANGE switch is

to

in

of

no

selection priate pin program lines select the highest range programming instructions are given

Figure 3-3 shows the Remote Connector J.14.

3-7. S 3-8.

TI1e per se panel flashes once for each sample.

15 samples per second sufficient time to extinguish between samples, on

3-9.

3-10. When

the Interface Hold line is grounded, a sample period initiated manually pushbutton. The instrument up trigger

signal

during a sample period.

3-11. Trigger input rear panel Remote connector, nector

3-2

of

on

AMPLE

AUTOMATIC

automatic sampling rate

cond

to

SAMPLE

continuously.

MANUAL

to

1000

per second

input

cannot

if

the

is

a diagram

RANGE

range

Remote Connector

is

grounded,

SELECTION.

may

be

in

made

the

(1000 V or

CONTROL.

SAMPLING

is

25

samples per second

RATE

AND

the

SAMPLE RATE control

circuit is gated so

be appl i

3480A/B

of

control.

At

the

incandescent l

REMOTE

by

pressing

may

by

an

external switching device. The

ed

to

the

connection

has Option

the

Trigger input connections.

the

REM position, remote

by

grounding the appro-

JI4.

If

none

of

the range

3484A

will

auto

10

Mn).

in

Paragraph 3- 19,

matically

Remote

.

variable from

by

The

SAMPLE indicator

rates above approximately

SAMPLE

and

releasing the TRIG

also be triggered

that

an

3480A/B

may be made through or

the BCD Ou t

003

one

sample

means

of

the front

amp

does not have

and

remains

CONTROL

is

set

External Trigger

Sample Generator

or

to

HOLD or

may

at

put

004.

.

rates

con-

Figure

and

be

the

-.

3-4. RANGE

Range may be sel remotely. Manual or remote range selection permits 50

% overranging. the numerical display reaches increased above continue However, readings above correct.

3-5.

AUTOMATIC

Automatic upranging occurs

display reaches

range.

SELECTION

The

15000

to increase until a reading

14000). Downranging occurs

.

ected

RANGING

manually, automatically,

OVERLOAD indicator lights when

15000.

on

any

range, the display will

15000

will

.

at

140% of

of

As

15999

not

the

input

is reached.

necessarily be

range (when

at

up

10%

3-12.

Remote Trigger

or to

3-13.

The

External Trigger

closure between Remote Connector

is

114 pin 25. the

Trigger Connector closure must

the circuit must before a trigger trigger commands

3-14. A transistor switch external triggering device. The

of

to + 0.5

input

Jl

V for

If

the

closure may be between BCD

3 pin

46

be

at

be

command

is

at

least

Input.

input

signal may

Jl4

3480A/B

least

1 millisecond.

has BCD Option

and

ground,

50

open

is given. Minimum time between

or

50

microseconds to init

Jl

3

microseconds

for

at

least

pulse circuit

input

voltage level must

in

SO

may

be

a circu

19

and

groun

003

or

Output

50.

The

circu

duration,

microseconds

be

used

as

iate

a sample,

it

d,

004,

it

and

an

be

0

3-1

Section

EXTERNAL

TRIGGER

EXTE

TRIGGER

1II

CONNECTO

BCO

RNAL

REMOTE

R

J1'

)

19

OUTPUT

CONNECTOR

J13

46

/

.--

I I

I

I I

L

3484A

-----

J41[ )

,--

I

I I I

I

--------

•

__

ISOLATEO

REMOTE

OPTION

041

_

- -

BCD

ASSEMBLY

3480A/8

J

5lEI

--,

23

J12

-

---

I

I I I I I I

I

>---

~.::;

----

Figure

EXTER

NAL

TRIGGER

GATE

3-2.

----

EXT TRIG

OE

H

___

Cotted

lin

es

Ext

ernal Tri gger

r-

I I I I

LAY I

<;>----

.J

1

IN

: OUT

~

-------

indicate optional s

--

-

_____

ign

-

OELAY

GENERATOR

-----------

al

path

s.

Connections.

----

~

---

MANUAL

ANO OELAYEO TRI

GGER

CI

RCUIT

___

----.

I

-,

l

I I I

l

I I

I

A~

: I

.J

I

_J

3484A

- 8 - J0 3

Model

66

3484A

3480A

IB

SA

MPL

E

GENERATOR

-

and + 2.4 V or

precedin mands summary

3-15.

3-16

A Assembly A3 mand Generator and, con dent upon functions time when

g a trigger

must

of

REMOTE

. De

lay

jump

er

to

be

sequently, the

and

of the

an

External

be interface

ed

External

wire conn

permits

delayed

to begin a

function

ran

instrum

with a change

r

esponse Trigg delayed m

ands

times

er

input

circuit

trigger command, additional

arc

blocked

measurement.

3-17.

Non-delayed

When

the

jumper

is

connecte comma Generator. commands and res

ult. The non-del

1000

in this

d in

nd

is

applied

Consequently

is

less

filtering selected,

per

second. The

mode

of

great

er

for

comma

nd.

not

less

than

I millisecond. T

signal

requirements.

TRIGGERING

Trigg

er.

ection on the Range

the

External

before

triggering

measurement. The l

maximum

and

degree

ges,

the delay corr

ent,

res

ulting in a correct

Trigger command

in

input

signal. Table 3-1 shows

for

the

various

is

gat

ed

until

after

External

on

the

than the response

ayed remote

operat

Trigg

the

Ran

OUT

position,

immediately

, if the

some

External Trigger ion also, preventing

at

least

Tim

e betw

RATE.

Trigger

triggering

of

filtering

esponds

function

so

that

the

er.

ge

and

Fun

to

time

erroneous

triggering

50

microseconds

een

trigg

er

com-

ab

le 3-2 gives a

and

Function

(Encode)

the 3480A

ength

rate

selected.

to

/B

Sample

of

the

are depen-

In

the

response

com

delay

most

measurement

is

applied

after

s.

The

initiation

coincident

delay

and

External

of

External Trigger com-

completion

ction

the Externa

the

3480

between

time

for

Ass

A/B

the

of

the

embly

l Trigger

Samp

trigger

function

A3

measurements may

rate

may

be

up

inpu

t circ

uit

is

gated

additional

trigger

FU

NCTI

voe

Filter Filter Filter

VAC(AC)

-

a

le

to

VAC(DC)

OHMS

100

ohm range

100

F

ilt

er

1000

kilohm

Filter

10

megohm range

Filter A

commands

measurement

3-18.

INTERFACE HOLD.

The

lnterface Hold

rear

pane

l R This line also appears at pin 4

7,

if the

I

nterface Hold connect Generator external control is is

produced

applyin

g a voltage level a voltage level G

enerator

Tabl

e 3-1. Delay and Res

ON

OUT A B 1 sec

OUT

A

from

thru

range,

reaching the

kilohm

DELAY

4 msec

200

msec 2

1

sec

3

sec

4 msec

200

msec

20

0 msec

Sample

period.

(Inhibi

t)

connection

emote

circ

signal

not

by

to

free-ru

3480

uit

in the

Connector,

A/B

to

be

when

HOLD

gro

und

ing

of + 2.4 V or

n.

th

e BCD

has

one

ion

all

put

the

front pos

the

of 0 to

JI 4

ows the 3480A/ B

in the

iti

Int

+ 0 .5 V. An

greater

pon

se

Times.

TIME

RESPONSE

00

200

Generat

is

available

1 7 (see Figure 3-3 ).

of

Output

the

Connector

BCD Opti

HOLD

panel SAMPLE

on. The

erface

HOLD

Hold connecti

open

allows

1 msec

msec

1 sec

15

sec

1 msec

m

sec

2 sec

or

during

ons.

sta

te

con

circ

the

TIME

at

the

JJ 3

The

Sample

by

an

RAT

E

dition

on

or

uit

or

Samp

le

a

-

3-2

-

\

-

Model

3484A

IOOM

V; IOOil.

RANGE

PROGRAM

V; IOKJl

RANGE PROGRAM

10

01/; IOOKfl

RATH)

INlER

PR

INT COMMAND OUTPUT

EXTERNAL

FLAG

Jl4

Connector

PROGRAMMING.

function, range,

equipped

by a continuous

ground

terminal,

the

3484A

NC

REMOTE

CONNECTOR

Figure 3-3.

3-19. 3

-2

0.

REMOTE

STANDARD

PROGRAMMING

REMOTE

Remote programming

standard

Option

connection

is common lines

3484A

04

l)

to to

connect

(not

is

accomplished ground. The the

LOW

directly

I

OOOMV; 100011 RANGE PROGRAM

IO

PROGRAM

Remote

of

input

to

filler selection circuits. Connections

RANGE PROGRAM

PROGRAM

IOOO

KO

RANGE

OH

MS PROGRAM

VAC (D

FACE HOLO

TRIGGER

(ENCODE)

114.

.

with

Isolated Remote

connection

and

function, range,

to Remote

PROGRAM

C)

PROGRA

VAC

(ACI

(INltlBI

1)

(FL

AG)

or

filter in a

(J14

program

Connector

M

PROGRAM

one-line

input

25)

and

114

arc

shown

in Figure 3-3,

of

interface signal requirements.

3-

21.

ISOLATED

3-22. This

so

lated BCD Option

I

041.

lf

it

is desired

so

lated Remote, in a

I BCD Option

removed from

3-23. The I be

ope

rated

isolat

ed

from

R

emo

te

Connector

e)

gro

lin sho interface signal

und

wn in Figure 3-3, and Table

REMOTE

option

so

can

to

004,

the Iso

the 3484A.

lat

ed Remote

remotely

the

3484A

J 14 are

, J 14 pin 25. Signal connections

requirement

and

Table

3·2

gives a summary

OPTION

be used

004,

which supplies power for Option

operate remote

3480A/B

lat

ed

Refer

option

by

signals

internal ci

ref

041

.

only

if the 3

that

does not have Isolated

ly a

480A/B

3484A

Remote Assembly

to

Paragraph 2-4.

allows

the

ins

that

are completely

rcuit

s. Connections

erenced

3-2

to

chassis (power

gives a

summary

s. The following paragraphs describe Isolated Program signal requirements different from requirements for

3-

24.

Remot

Function,

e selection

Range,

Filter,

of

function range, filtering, or ratio accomplished by single line addition, connection to minimum

Isolated R prog

desired

Isolated R

of

SO

emote

ram

lines

to

make a change in

emote

the Program Accept lin e

µsec to

"set"

circuits. Program storage then allows

be

returned

non

-isolated programming.

or

Ratio

Program.

connec

tion

to

programming requ.ires a grou

(JJ4

the

sel

ected

progr

to

IILGII

(or

ope

the

program sel

ected.

Section

having

must

trument

to

Jl

4

that

ground. In

14)

for a

am into

n)

unt

il

it

Condi·

Ill

has

be

to

arc

of

are

is

nd

the the

is

ENCODE

FLAG

INHIBIT

REMOTE ISOL

PROGRAM

(EXTERNAL TRI

Initi

ates a measurement

(PR

ates

of

meas

Command

Option

(INTERFACE

trigger

ATED

INT

instrument

command

PROGRAM

Indic

Print

Prevents

Function,

COMMAND

receipt

of

Output

or

Encod

period.

004

from

is given.

.

ter,

urement

003

REMOTE Range, Fil

ACCEPT (ISO

FLAG (ISO

SIGNAL

GGER)

period

.

OUTPUT)

e (Trigger)

is present only

HOLD)

samp

ling

unle

SELECTION PROGRAM

Ratio LATED

LATED REMOTE

or

SELECTION

REMOTE

Table 3·

Command

if

3480A/B

ss

manual

PROGRAM

PRO

and

or external

GRAM

2. Interface

completion

includes

ONLY)

Signal Requirements.

TRIGGER Level between trigger commands

open circuit Minimum

+

2.4 V or

0 V

to+

BCD

(Print

Duration

nd

a

INHIBIT FREE-RUN

SELECT NOT SELE Isolated

PROGRAM

of or

PROGRAM FLAG goes

of Level goes co

= O V

to

t· 0

.5 V for

for

minimum

time

bfftween

greater

ind

0.5 V indicates completion

Command).

of

HIGH

Delay

programm

= 0 V

= +

= 0 V to+

CT = +

remote

ACCEPT

50

microseconds

open

circuit

Program

to

mpletion

icates

portion

ing

to 4 0.5

V.

2.4 V or

0.5

V.

2.4 V or

signals referenced

line mu

to

between

Accept

Command.

0 V to+

of

programming

CONDITIONS

minimum

must

of

50

micro

trigger command

start of

measurement

of measu

of

signal is dependent

.

greater

or

open

greater

or

to chass

st be 0 V to+

act

uate.

Line

Program

to 1 2.4 V or

0.5

V 1

.

Accept

milli

of

be+

sec

circuit.

open

is

must

greater

seco

nd

50

microseconds.

2.4 V or onds s is 1

circuit.

be+

Commands.

.

millisecond

perio

rement peri

upon Filter

(power

0.5

V for

2.4 V or

to

indi

later

to

greater

line)

cate rece

d.

od

ground

minimum

greater

indicat

or

.

ipt

e

3-3

Section III

Model

3484

A

FUNCTION PROGRAM

RANGE

PROGRAM

FILTER

PROGRA

PROGRAM ACCEPT - ...

PROGRAM FL

EXTERNAL TRIGGER

3484A

• B- 30

369

l

M

AG

I

'

f----------

I

--t

l~--------~

I I

I

1--

l=

50J

1

~ec=J

1"4-

I·

I

I I I

I

I I

I

I I

T4 T5

I

IM

I I

I

Sec

r4r--------1

~

T6

I

I I

I

Tl

I

30"

Sec

-'

I

I I

I

I I

I

I I

T2 T3

J-----1

·

'f---i

I

f,

I I

I

~

I

L-

I

,.._._

, I

Tl'

T2'

-

-.

T1

- Sel

ection

of

gram

T2

- Program simultaneously.

T3 -Approximate

of goes HIGH Command

T4

- Program

Minimum seconds. Program changes may the not pr

tion

of

the

Program

time thi

ogram

desired range, fil

lines.

Accept

Command.

ly

30

microseconds

Accept

Command,

to

indicate

and

execution

Accept

line

time

between T2

s l

ine

be

returned

change is desired.

is LOW. Progr

to HIGH

remote program lines during the time the Program Accept line is HIGH has no effect ming, because a program change Program Accept line is

3-25. P

rogram Flag

The Program Flag signal

LOW

.

at

J14

ter,

T 1 and

Program Flag signal

receipt

of

programming

returns

to

and

occur

am

unless a subsequent

Figure

can

occur only while

20

or

function

T2

after

Program

HIGH

T4

is

Accept line

pro

-

may

occur

application

Accept

.

(or

open).

SO

micro-

only

during

need

34.

Isolated Remote Program Sequence.

on

program-

goes HIGH when a

Program Accept command is given, indicating receipt

this command. Approximately 1 mil

to

LOW

Flag returns

, indicating

li

second later, Program

completion

of

program-

the

of

TS

- Program selection lines (o

r open) if desired. A

HIGH

unless a subsequent

and

am

Flag signal goes

of

programming. An

may

now

of

new

be

LOW

during

Accept

time

T6

- Progr

T1

' - Sel

T2'

- Program

desired. T4

pl

etion

mand

ection

must

Minimum seconds.

TS

be

line

may

occur

applied.

program. Al

Program

Command

between

may

be returned

need

not

program

simultaneously.

LOW

External T rigger

l desired

Accept

to

T4

and

be

returned

to

indicate

program lines

Command.

change

T2'

is

to

HIGH

to

change is

comcom

prog

ram.

SO

micro-

-

ming. This time is requi red because range and filter

on

in the

348

selecti relays.

An External Trigger command should

4A are accomplished

until after the Program Flag signal returns 34

shows the Isolated Remote Programming Sequence.

3-

26. REMOTE

A mating program cable, -hp- Model 11149A Remote

PROGRA

M CONNEC

Program Cable is available through

by

means of reed

not

to

LOW. Fi

TION.

yo

ur

nearest -hp- Sales

be applied

gu

re

·-

34

-

3480A

- B -

30264

and Service

Office, Listed

in Appendix connector for Remote connector following parts:

Jl4

-

------

is made

2

------;

ECM

'"\..;>--

Figure 3-5. Guard Connection.

3-30.

B.

The mating

up

of

the

If

problem,

LOW terminal.

3480A/B

r--

--------1

I

HIGH

LOW

f-z•,-i

:

t_

,

{_:_,

Z2

- - -

1WLTMET

- C

hou

_j

--'

*

HA

GUARD

~

:

I - t

-------

common mode voltages are

the

GUARD terminal s

L_

ER

SSIS

not

expected

ld

be

connected to the

Section

to

Ill

be a

hp

- Part

No.

ITT

-

r-

Description

Body: connector, Boot:

connector

Contact

Lock:

connector

Lock

post

(2

required) 1251-0218

3-27.

GUARD

25-pin

CONNECTION.

3-28. A GUARD terminal is provided rear panel to common mode

inputs

of

the

this terminal provides high rejection

voltages. Common

-

1251-2417 DBC25P-FO

1251-0

392

125

1-2

384

1251-1042

at

Model 3484A. Proper connection

mode existing in the sou rce circuitry between the ment

point

and

power line ground, and between line ground point 3480A/ ECMJ

B.

In Figure 3-5

due

to due to E2, and ECM2. between

LOW

of the source circuit

th

e de common mode voltage

El.

The ac

common

Zl

and

mode

voltages are ECM!

Z2

are leakage impedances

, GUARD, and chassis (power line) ground.

3-29. Jf the GUARD terminal is connected

th

at

of

the

LOW

potential equal to

the

point different from

LOW

mon mode voltages are effective

values

of

RA

and

RB

the RA/RB = terminals is due LOW GUARD terminal a

(Rl + R2)/R3, at

the

same de voltage above ground.

no

potential difference between these terminals,

to

common mode voltages does

terminal and

nd Z2, and does

are selected so

placing the LOW

Zl,

but

input

terminal co nnection, com-

ly

rejected. In Figure 3-5,

not

instead flows through the

not

measurement.

Cannon No.

DB-51212

030-1952-000

DB

both

of

-51221-1

D-53018

front

ac

and

-1

and

de

voltages are those

LOW

measure-

the

power

and

that

of

the

is

to

a de

terminal

that

and

but

the

GUARD

Sin

ce there

at

ratio

current

flow through

affect

the

voltage

3-31. More detailed information of

guarding may be fou No. 123, application n

"Floating Measurements and Guarding." This

ote .is

available through you r nearest -hp- Sales

and Service Office, listed

3-3

2.

DC

VOLTAGE

3-33.

FILTER

Filter selection front panel set

to

the REM position. Normal mode rejection

input

of

SELECTION

may

FILTER

50

Hz

and above is as follows for

nd

in

Appendix

MEASUREMENTS.

.

be

made manually by means of the

switch, or remotely when the swit

positions.

Out: 0 dB

Filter

A:

>

30

dB

> 80 dB

PONSE

TIME.

3-3

Filter

er

Filt

4. RES

B:

a

The response time affect the autoranging time, determining the tion

or

system

of

optimum

applicat

the

3480/3484A

and

triggering rate

ion

. Remote triggering rate inform tion is given in Paragraph 3-1 5. Following are times, without range change, for

Out:

1 msec

to

Filter

A:

Filter

200 msec

Filter B: 1 sec

within l

to

within I

to

within l coun t

on

purpose and methods

-hp- Application Note

B.

of

ac noise

the

three filter

amplifiers

may

also

for

th

e three filter positions.

count

of

count

of

final reacting

and

be

a factor in

remote opera-

the

response

final reading

ch

is

filter

a-

3-5

Section

!II

M

odel 3484A

3-3

5.

AUTO

RANGING

Time required for automatic ranging is partly upon

the

degree

are required per range change.

Filt

er

Out: 4 msec

Filter

A:

200

msec

Filter B: 1 sec

When autoranging occ remains HIGH until measurement is taken

recorder from printing erroneous readings during

ranging.

3-36.

MEASURING SPEED

The

automatic sampling rate

second to 25 per

the

control posit the inst TR

IG second. The remote triggerin g 3-15.

3-37.

The measurements. quire a different sequence.

is adjusted fully co

ion,

or

the

Int

rum

ent

may

pushbutton,

DC

VOLTAGE

following is a general procedure for making de voltage

Special measurement applications

a.

Turn

instrument

hour.

TIME.

dependent

of

filtering selecte'd. The following times

ur

s,

the

Print

Command

after

the correct range is reached

on

that

range. This prevents a

.

is

variable from

second

with

the

front

panel control. When

unt

erclockwise to

erface HOLD

be triggered manually by means

or

remotely

MEASUREMENT

on

rate

and

(Inhibit)

allow

line is grounded,

up

to

1000

is discussed

PROCEDURE

to

warm

in

the

times per Paragraph

up

one

Out

and

auto·

HOLD

of

.

may

for

put

a

per

the

re-

one

Because ment , filtering may be required for quiet readings greater

than adequate. When measuring higher resistances range, capacitance changes caused

or Selection settUng

3-40.

Times required

within 1

3-

Time required for

upon

are required per range change.

When autoranging occurs,

remains HIGH until

measurement recorder from printing erroneous readi n ranging.

3-4

of

noise generated

100

H2.

In

most cases,

test leads may cause changes

of FILTER

time

of

the

readin

RESPONSE

count

100 n thru 1000

kfl

10

Mn

range (Filter A): 2 sec

41.

AUTORANGING

the

degree

Filter

Out: Filter A: Filter

B: l sec

TIME

to

of

final reading) are as follows:

100

kn

range (Filter A):

automatic

of filt

4 msec

200

msec

is taken on

2. MEASURING

in

the

FILTER

B reduces

g.

.

respond

after

SPEED

to

ranges

(no

200

TIME

.

ering selected.

the

correct range is reached

that

.

resistance und

A position should

by

movement

in

this

effect,

full scale step inputs

filtering): l msec

msec

ranging is partly dependent

The

Print Command

range. This prevents a

er

on

the

measur

but

following tim

gs

during auto-

measure-

be

10

Mn

of

hand

ement.

increases

(to

es

Output

and

s

-

a

Set FUNCTION switch to VDC

b.

programming

of

none Paragraph 3-3.

c.

Set RANGE switch AUTO

d. Select filtering manually

Paragraph 3-33.

e. Adjust

pling speed, to

f.

Connect GUARD. Refer

g.

Select voltage display.

3-

38.

RESISTANCE

3-39.

FILTER

3-6

the

or

REM operation. Refer

SAMPLE RATE control

or

Paragraph 3-7.

FRONT

and

MEASUREMENTS

SELECTION

or

REM.

If

remote

is

used, VDC function results when

other

functions is programmed. See

to

correct range,

to

or

remotely. Refer to

apply external trigger signal. Refer

to

Paragraph 3-27.

or

REAR terminals. Connect

read measurement

or

Paragraph

to

desired sam-

on

front

(OPTION 042

.

select

34.

input panel

).

In resistance measurements, as in the

automa

to

25 per second control is in (Inhibit) line is gr manua

1000

discussed in Paragraph 3-15.

3-43.

Current through according to range selected to produce a 1 V full-scale resistance. The value shown

tic

samp

ling

rat

with

the

HOLD position

ounded,

lly with the

times per second. The

OHMMETER

in

Table 3-3.

the

Tab

le 3-3.

RANGE

1oon

10000. 10

100

1000

10Mn

TRIG

CURRENT

resistance being measured is varied

Ohmmeter

kn

kn. kfl.

de

voltage measurements,

e is variable

front

the inst

pushbutton, or

from

panel control. When the

or

the

rum

ent

remote

.

of

current

Current.

CURRENT

10mA

1

mA

0.1

mA

10µA

1µA

O.l

µA

may be triggered

triggering rate is

for each range is

one

per seco

Interface Ho

remotely

drop

up

across a

nd

ld

to

-

7

,_

Model

3484A

3-44. LOW

RESISTANCE

MEASUREMENTS

Section III

3-48.

.

MAXIMUM

INPUT

VOL

TAG

ES

.

Wh

en measuring low

the I

00

D.

range, internal wiring resistance and test lead resistance become a significant part display. The internal wiring resistance may be as

milliohms on the 1

sig

nificant digit) with a direct short across the input

terminals. Before making a low resistance measurement,

short the test leads together and note the offset shown

the display. This offset represents test lead and wiring resistance and should be subtracted from the resistance m

eas

urement. adjusting the front panel ZERO control. This incorrect m

Do

eas

urements on

3-45. RESISTANCE

a. Turn instrume

hour.

b.

If

resistance to be m

make sure power to the circuit

that no residual voltag c. Connect GUARD terminal to d. Set FUNCTION switch to

e.

Sel

ect RANGE

AUTO.

f. Adjust

pling speed, or apply external trigger. Refer to

Paragraph

Wh 1000 gra on the 100 n or 1000 n ranges, refer to Pa

g.

Select FRONT or REAR terminals and connect

resistance to be m

terminals and read measurement

display.

valu

es

00

n range

not

attempt to remov e the offset by

all

MEASUREMENT

nt

on and

manually or remotely, or set to

SAMPLE

3-7

.

en making

kn

or 10

ph

3-39.

When

ragraph

344.

of

resistance, particularly on

ran

(5

ges

of the m counts in the least

and functions.

eas

high

will

urement

as

50

in

result in

PROCEDURE.

all

ow to warm up for one

eas

ured is within a circuit,

is

turned

off

and

es

are present.

LOW

.

OHMS.

RATE control to desired sam-

NOTE meas

urements on the

Mn

ranges, refer to Para-

making measurements

eas

ured across HIGH a

on

front panel

nd

LOW

3-49. Maximum input voltages permissibl function are 1500 V peak ac, 1500 Vdc, or a total peak value (ac

3-50. In the V AC(AC) function, peak ac input limit is

1500V The de volta and 100 having a de component greater than the limits shown may be connected in series with the input HIGH terminal. The capacitor must h

component

the external capacitor must n

3-

Response time in the V

5 counts of final readin

ti

me FILTER switch setting h time or filterin

3-52.

The automatic sampling rate is variable from one per

second to

the control is

{Inhibit)

manually by means up to 1000 times p the ac converter should be taken into consideration when deter Paragra

3-53.

Autoranging time (per range change) V AC( FILTER switch setting do either Command Output remains HIGH until after the correct

ran This prevents a recorder from printing erroneous readings during autorangin

+de)

of

1500 V.

and total peak volta

ge

input limit on the

Von

all oth

er

mea

sured

if

an external J 0

ave

a volta

of

the input voltage. Leakage current throu

51.

RESPONSE

is

15 seco

MEASURING

25

Lin

min

ing the remote triggering rate, which is discussed in

ph

3-1

TIME.

nds

to

g.

SPEED.

per seco

e is grounded, the instrument may be triggered

5.

nd

in the HOLD position or the Interface Hold

of

er

AUTORANGING

AC)

mode and 3 seconds for the V

ac

function. When autoranging occurs, the Print

ge

is reached and a measurement is taken on that

g.

ge

limit

ranges. The ac component

µF

ge

rating greater than the de

ot

exceed 1 µ.A.

AC(A

C) mode is 1 second

g.

In the V AC(DC) mode, response

within 5 counts

as

no effect on either response

with the fro nt pan

the TRIG pushbutton, or remotely

second. The slower respon

TIME

.

es

not affect autoranging time in

e in the VAC(DC)

(ac+dc)

JOO

mV range is

blocking capacitor

is

1500V

of

to

of

final reading.

el

control. When

se

time

I second for the

AC(DC)

IO

V,

inputs

is

gh

within

of

mod

range.

.

e.

3-

46.

AC

VOLTAGE

3-47.

AC

OR

DC

The V

AC(AC)

ments

of mode extends the frequency ran permits to a measurement containing

V(DC)

2+(ACrms)2. In addition, measurement

component an external 10 µF blocking capacitor.

function permits true

frequencies from 20 Hz to J MH

tru

e rms measurement

of

signals down to I Hz may be made by adding

MEASUREMENTS

COUPLED

MEASUREMENT.

of

both

ac plus d

(OPTION

rms

voltage measur

z.

The V

ge

down to 1 Hz, and

e. The response

ac and de is equ

of

043).

AC(D

al

the

e-

C)

to ac

3-

54.

AC

VOLTAGE

a. Turn instrument on and allow to warm up for one

hour.

b. Set FUNCTION switch to V

See Paragraph

c. Select

switch to

d. Adjust

MEASUREMENT

347.

RANG

E manually or remotely, or set

AUTO.

SAMPLE

RATE control to desired sam·

PROCEDURE.

AC(AC)

or V

AC(DC).

3-7

Section

Ill

Model

3484A

piing speed, Paragraph 3-7.

e. Conn

f. Select FRONT

ect

voltage and read measu display.

or

apply external trigger. Refer to

GUARD terminal to LOW.

or

REAR ter

rement

minals. Connect

on

front

input panel

NOTE

Due to design,

the

10% of a measurement falls below

switch

the

input

full scale

to

the

nature

display will

is

shorted,

the

not

and

may

not

lower range.

ac conver

be

readings below

be accurate. If

10%

ter

zero when

of

scale,

-

3-8

-

I

Model 3484A

Section IV

SECTION

THEORY

4-1. INTRODUCTION.

This section methods employed in the Model 3484A to enable the 3480A/B 100

mV ments Simplified Block Diagram Block Diagram an explanation

4-2.

DC

4-3. INPUT

In de voltage m bypassed on the IOOmV, lOOOmV, and Attenuation on the

I. Input resistance three lower ranges, and ranges. The Input Attenuator tance and ac voltage measurements. Attenuation is controlled by reed relays which arc driven by signals from the Ran

gives

a brief description

to

make

ac

and de voltage measurements

to

1000 V full scale, and resistance measure-

of J 00

n to 1 O

Mn

full

of

is

shown in Figure 7-2. Table 4-2

of

Logic Symbols used in this manual.

CIRCUITS

.

of

the circuits and

scale. Figure

the 3484A. A complete

ATTENUATOR.

eas

urements, the Input Attenuator

100 V and 1000 V ranges is 100 to is

greater than 1010 ohms on the

10 megohms on the two higher

is

also bypassed

ge

and Function Assembly A3.

lOY

4-1

ranges.

in

OF

of

is

gives

resis-

IV

OPERATION

4-4.

FEEDBACK

The

gain of

of

amount back

feedback voltage. Since the amount

is

inversely proportional

the correct

a

selected by signa Table

by

ls

4-1

lists the relays closed for each de voltage range, together with the input attenuation and amplifier gain. In both ac volta closed, output is

giving

0

to + 15 V on

is

voe

RANGE

100

mV

1000

mV

10

v

1

00

v

1000

v

ATTENUATOR

the

DC

Amplifier

re

sistance for each range and function

.

is

adjusted by varying the

to

the feedback resistance,

reed relays. These relays are also controlled

from the Ran

the

DC

to

± 15 V on all de voltage ranges, and 0

all

ac volta

Table 4-1. DC Vol

RELAYS

CLOSED

A1K1 A1K 1,

A2K1

A1K 1,

A2K2 A1K2, A1K3, A 1

K2,

A 1

ge

and Function Assembly.

ge

and ohms functions,

Amplifi

K3,

er

a gain

ge

and ohms ranges.

tage Ran

INPUT

ATTEN.

A2K1 A2K2

100/1 100/1

ge Rel

1 /1

1/1 1/1

of

ays.

AM

GAIN

of

feed-

A2K

l is

10. Amplifier

P.

TOTAL

GA

IN

100 100

10 10

1 1

10

0.1

1

O.Q1

is

--

I

NPUT

LOW~

GUARO

>-

Al

-

-4---+

--I

TRUE

CONVERTER

OPTION

A7

'---+--+-__,f-+---

RMS

AU

CM3

MAN

REM

rJ.'aoiiiB

- -

AC

0 TO+

MA.N

1.S

V

R

EM

SELEC

A3

flllE

ll

TION

VARIABLE

~EE00ACK

Sf NS(

I

L

__

OHMSI

OC

--i

CONVCRTCR

OPTION 042

A6

RANG

SELE.CTI ON

AJ

E

TO

OTO+ 15 V

1---

-----

---+-~

Figure 4-1. SimpHfied Block Diagram.

_

4-1

Section

IV

Table

4·2. Logic

Symbo

ls.

Model

3484A

HIGH, or

LOW.

or

"1"

• +

NANO

All

inputs

duce a

J

K

2.4 V or

GATE

must

LOW

"O" • 0 V to-+ 0.5

CLOCK

great

V

output

be

er

HIGH

.

to

Q

pro-

INVER

If

input

or

LOW

ou

tpu

TER

is

HIGH, outpu

input

t.

t is

produces HIGH

LOW,

.....

-

J-K

FLIP-FLOP When Cl HI

GH

to

level

of J input, a ou level of K LOW

et s

LOW

at

ock input

LOW, Q outpu

input.

sets Q

ts Q

outp

output

0

R0 se

goes from

t assumes

tput

assumes

ut

HIGH

-.

FLIP-FLOP

A n

ega

.

changes

tive-going

the

state

of

input

the

pul

se

flip-flop.

LIP-FLOP

F A

LOW

co

rre

HI GH.

spo

at eith

nding

er

input

output

causes

to

the

be

FLIP-

FLOP

A

LOW

at

corre~ponding

HIGH.

eit her input

output

causes

to

the

be

-

4

-2

Model 3484A

ATTENUATOR

INPUT

9ROTECTtO

Section IV

+30V

3460A/8

E1N

r----

SENSEi

1

I

1

I

L

__

_

1a.

2v

1e.2v

FEEDBACK I

ATTENUATOR

N

VARIABL

3482A· 8 •30319

FI L

TER

E

L[Al<AGE

CO

MPEN-

SATION

-30V

FILTER

AMP

Figure 4-2. Simplified Diagram, DC Amplifier.

4-5.

DC

AMPLIFIER

4-6. Figure 4-2 is a simplified diagram

.

of

the

DC

Amplifier. This is a non-inverting amplifier having a

input

differential

stage and a push-pull

The dual field effect transistors used

pl

oyed

are em

as source-followers

pedance greater than

1ol

0 ohms on

to

output

in

the

provide

the

stage.

input

stage

input

im·

three lower

ranges.

the

of

current

ICIA

"bootstrap"

common Any

common

and IClB

4-7. The

constant prove amplifier. gates of

Q2A and Q2B. This "bootstrapped" IClA

and lClB. Since constant current sources

I3

maintain the proper bias currents for

up

to

voltages vo

ltage from appearing

fier

output.

± 1 S V, this prevents

4-8. The dual fie

sources

diode string,

11

and 13, is designed

in

conjunction with

mode rejection characteristics

mode voltage appearing will

be

coup

led

to the

common

emitter

drain connection

the

as

a voltage change

ld

effect transistor is a special

to

im·

of

the

at

the

to the emitters

connection is

of

11

and

common

mode

common mode

at

the

ampli·

part containing a heater which maintains a high temperature within

part is affected very little

the

unit.

Consequentl

y,

the performance

by

external temperature

of

this

changes. The Leakage Compensation circuit prevents

in

the

leakage current

an

causing

offset voltage

field effect transistor , l

at

the input.

4-9. When the instrument is

Overload

Protection circuit limits

on

the 100 the

voltage

Cl

A, from

mV range, the

at

the

gate

-

30V

of

IClA

to

about

limit is

about ± 18 the resistance and zener diodes in prevents an excessive

input

transistor. Two zener diodes

put

limit

the outpu

4-10.

VARIABLE

± 1.8 V. On

V. This circu

input

voltage from damaging the

t voJtage to

FIL

TEA

AND

all other

it,

at

about

FIL

in

conjuncti

the

± 18 V.

TEA

ranges,

inp

ut

on

circu

the

with

amplifier ou

AMPLIFIER.

it,

The Filter Amplifier, used in conjunction with RC filter components, permits a high degree relatively fast response time. Filter switching is plished by reed relays controlled

of

filtering with a

by

circuits on the

accom·

Range and Function Assembly, A3. The Filter Amplifier is a unity gain non-inverting amplifi er, having its

to

the

input

capacitively coupled

4-11.

Wh

en

MANUAL

the FILTER

AND

REMOTE

OUT position switch is selected, a reed relay semb

ly

bypasses Filter Amplifier A is selected, RC

filter components are connected, and

relay is opened. In

er

capacitance is added. When t

filt set

to

the selected remotely . Filter

Out

also affect

the

RC filter components, and

output

the

is disconnected. When

Fil

ter

the FILTER

REM positi

on, either

If

neither A

condition results. The Filter Selection circuits

the

amount

of

filter circuit.

FIL

on

Amplifier

Filter A

or

delay prese

TEA

of

the front panel

the Attenuator As-

output

B position, additional

he

FILTER

B is

nt

output

SELECTION

the

FILTER

and certain

the

bypass

switch is

or

se

lected,

in

B may

the

be

the

Auto·

ranging and External Trigger Delay circuits.

t-

.

4.

3

Sec

tion IV

DOWNRANGE

Go

•

n1g11iw only

co

unt

ii

0999

C

LOCK

Pr111n1

sample

UPRANGE

Goa

M9'!11fvt

COUltl

it

higher

.

or lower

CDNTRD

l'ltfY

period

only

14000

~

ii

.

I I

l

S

AMP

LE

PERI

OD

1

r-

--....;

if

I l

or

DO

L

I

__!

' I

I C

I

1

OHM

S

ENABLE

R2

WNRANGE

COMMAND

UPRANGE

OMMAND

RJ

AUTO

U

PRANGE

COMMAND

F

igu

re 4-3. Autorange Control Circuits.

- -

I

I I

I

I I I I

v

I

f

D

OWNRANG

-

COMMAND

DOWN

RANGE

U

-

GATE

PRANGE

GATE

Model 3484A

E

L

AUi

ORA

NG~

C

OMMAND

}484A

• R }

0}80

4-12.

FUNCTION

4-1

3. The Function Selection circuits (Figure 7-5),

whi

ch consist mainly

NANO

gates, require the desired to R

EM

, gat

OIJMS,

VAC(AC), or

programmed, another gate

SELECTION

of

a voltage

fun

ction.

When

es

are enabled to permit remote selecti

VAC(DC

CIRCUITS

.

integrated circuit inverters a

of 0 to + 0.5 V to select

the

FUNC

TION switch

). If none

causes

the

voe

is set

on of

of

these arc

function to

nd

be selected.

4-14. Selection circuits for the V AC(AC) and V

fun

ctions are connected

fi

guration so that the

converter do not open when switc

two functions. This is accomplished

ca

4.7µ F

pacitor

in

a "make before break" con-

in

put and output relays Lo the

hin

g between th

by

in

each selection circuit to provide

the

AC(D

use

C)

ese

of

sufficient delay.

4-15. The Enable signals from the Function

se

circuits are u

d lo operate the Function Annunciator

Lamp drive circuits, and to provide BCD function mation to the 3480A/B. An Enable si that particular function h

4-16.

RANGE

4-17.

AUTORANGE

Wh

en the RA

SELECTION

NGE

as been se

CIRCUITS

CONTROL.

switch is set to

gnal

lected.

.

AUTO

Se

lection

infor-

is

LOW

when

, the Auto·

range Control circuits are enabled to provide Autorange

An

Auto

ran

ge

Commands to the Range Register.

mand results at the e the measurement is unl

ess

either the highest or lowest ran

Figur

reached.

e 4-3 is a diagram

nd

of

14000 or

any sample period

grea

ter or l

ess

ge has

of the Autoran

Com-

in

which

than 1000,

been

ge Con-

trol circuits.

4-18. Downrange Control

The operation such that a outp

ut. Conversely, if any input is

of

ll

inputs must be HIGH to produ

HIGH. In autorange operation, the

ge

the Downran 1

00

mV (100

Limit Gate is HIGH.

n),

Consequently , the gate out put ran

ge sign

al,

whi

ch continu

.

the

NANO gates used

the

JOO

mV Enable sign

es

in the 3484A

LOW

, the output

AU

TO signal

On

all

al

is

controlled by the Down

thro

ugh

lo the Downrange

Gate. At the same time, the Clock Control

ge

applied to the Downran

HI

GH, producing an Autorange Command. When

ac

a

est ran

low

LOW remain

. This cau

ge

is reached, the 100

ses the Downran

HI

GH, preve

Gate, causing both inputs to be

mV

Enable signal goes

ge

Limi

t Gate output to

nting

tJ1

e Downrange

passing through.

4-19. U

4-20. ln all

l

both be HIGH. The R2

0

Mn

prange

fun

Enable

Control.

ctions except

in

puts

12_

Ll

OHMS

, the Ohms Enable and

~

Up

range Control circuits will

· R3 input will

be ranges exce pt the 1000 V range; consequently, the lower input to the Since the Limit Gate output w This coincident with the Clock

Upran

I 0 Mn

signal

Enabl

then continues throu

ge

Limit Gate (Figu

re 4-3) w

e input is also HIGH, The Upran

ill

be controlled by the Uprange signal.

gh

to the Uprange Gate

Control signal, pr oduci

AutorangLCommand. When the 1000 V ran

the R2

· R3 input goes

HIGH

. T

his

causes the output

Uprange Limit Gate to remain HIGH, preventing the

Uprange si

4-21. When

Enable signal is

gnal

from passing thro

ugh

.

the OHMS function is selected, the Ohms

LOW

, causing the lower input to the

Uprange Limit Gate to remain HIGH. The 10

is

ce a LOW

will

be

input to ranges except is

also HIGH.

sig

nal

is also

the

sig

nal from

LOW

on a

ill

be HIGH.

ge

ng

an

ge

is reached,

of

the

Mn

Enable

-

ll

44

Model

3484A Sectron

IV

oow~~~~~f

AU

TO

RANGE

COMMANO

U~~~~~f

3484A

input

will

be HIGH

0

Mn

range

I the

Uprange

is reached, this input

signal from p

4-22. In addition

gates, a gate circuit is provided at the input

~~tBLE

____

FLIP· FLOP

1

~~~~~E

----

- B-

303

71

on a

ll

ranges except 10

assing

throu

to

the Uprange and Downrange

R1

-<-----------

Fi

goes

gh

__

gure

LOW

the gate.

___________

44.

Simplified R

MSG. When

, preventing

Limi

of the R3

the

Flip-Flop to prevent the Range Register from assuming a 011

or

111

state when first turned on. Either would result in more than one at the same

time.

Ran

ge

Relay Driver being on

of these

states

~

A2

RJ

FLIP F

LOP

2

·

FLIP· FL

OP

J

----'

R2 · RJ

LOCKOUT

A2

AJ

ange

Register

t

1000

RANGE

v 1000

00

v 100

1

10

v 10

mV

100

mV

Dia

gram.

Table 4-3. Ran

10M

kO kO kO

10000

1000.

<l

ge

Register Con

R1

0 1 0 0

0

1

0

1 0 1

tent

.

R2 R3

0

1 1

0 1

0

0 0

4-23.

The R

RANGE

ange

REG

ISTER.

Register consists

of

a three-stage binary counter

which is enabled to count up or down by the Downrange

and

Up

range Enable signals. In Autorange operation, the six outputs R

ange

4-24.

At measurement circuits provide

of

the Range

Relay

Driv

Downranging

the end

Register are used to control the

ers.

.

of

a sample period which resul

of

0999 or less, the Downrange Control

an

Autorange Command

to

the

ts in a

Range Register. At the same time, the Downrange Enable line LOW

, allowing the Range Register to count up.

As

an example, assume that the input is 10 V and that the instrument upranging or downranging Ran

ge input volta will

be less than 0999, resulting range) Command. This negative-going state

of LOW. the

Rl negative-going transition state R2 output changes the state of Flip-Flop 3. The Register content then becom

is

on the 10 V

Register content is 110,

ge

is decreased to 0

Flip-Flop 1, causing

The Downran

output line

ge

Enable line

is forward biased, allowing the

ran

is poss

as .9

Rl

to pass

ge, from which either

ible. In this state, the shown in Table 4-3. If the V, the next measurement

in

an Autorange (Down-

signal

changes the

output

to

go

from HIGH to

is

LOW

and the diode in

through and chan

ge

the

of Flip-Flop 2. In the same manner, the negative-going

Range

es

001, and the 1000

mV

range is selected.

4-2

5. U

prangi

ng.

The Uprange Control circuits provide an Autorange mand to the Range Register at the end which

results

in

a measurement

same time, the

ange Regis

R

Uprange Enable line

ter to count down.

4-24, that the input is 10

I 0 V range. The Ran

input volt

will

age

be

greater than 14000, resulting

ge

Register content

is

increased to 1 S V, the next

of

V,

and the instrument

of a sa

14000 or greater. At the

is

LOW

Assume, as

is

agai

in

(Uprange) Command. This Autorange Command changes

l,

the state of Flip-Flop

is

to

LOW.

The Downran

causing output to

ge Enable line is now HIGH and t diode in the RI output line the negative-going change the state

RI output cannot p

of Flip

Register content has been changed to 0 l

range

has bee

n selected.

4-

26. RANGE REGISTER DECODING

A series

of

gate circuits is used Register outputs and produ range

se

lected. The Enable signals operate the Ran

ers

to

Driv gain

provide the correct attenuation and amplifier

fo

r each range. The Enab Annunciator and Decimal Lamp range info rmation

to

the 3480A/B.

-Fl

is

reverse

op

ce

2.

Therefore, the R

to

decode the six Ran

an

Enable

le signals

Dr

ive

go from HIGH

biased; consequently,

ass

0,

.

signa

rs and pro

Com-

mple period

, allowing the

in

Paragraph

is

on the

n 110. If the

meas

urement

an

Autoran

ge

he

throu

gh

to

ange

and the 100 V

ge

l for each

ge

Relay

also

operate

vide

BCD

4-5

Section

PROGRAM

TV

REMOTE

RANGE

100MVI1

1000

MV

(1000

1

0V(IOKOI

100V1100 Kn)

1000

Model

3484A

00

nJ nJ

Kn

l

OMO

ENABLE

l

OMO

OHMS

Fi

gure 4-5. Remote Selection

4-

27.

REMOTE

4-28. Power integrated circuits on

REM

. Consequently, connections to the Remote Program lin selection. a range program

to be

LOW

4-29. If none hjghest range

the circuits which function grounded, Inverter A output (10 selecting the 10

would cause

LOW

, enabling the 1000

OHMS outputs

input to

LOW.

RANGE

is

supplied to the Remote

es

cannot affect the other modes

In

remote programming, a ground connection to

lin

SELECTION

.

Range

ly

when the RANGE switch is set to

e causes the corresponding Enable signal

, turning on the relay driver for that range.

of

the Remote Program lines

is

automatically selected. Figure 4

make

is

selected and none

Mn

range.

B output to

kn

Inv

erter C is HIGH, holding B and C

this selection.

of

Mn

The

LOW

be

HIGH and D output to

range also, except that the

is

grounded, the

If

the

the program lin

Enable)

output

will

of

Inverter A

4-30. If a voltage function is selected and none

is

Remote Program lines

again

is

Enable si voltage

is

when the

LOW and

gnal

supplied to the Ohms/DC Convert

OHMS function is selected. The

the 10

has

no effect on the

from Inverter A causes

LOW.

to be

the

1000 V range.

4-31. MAN

When

The 1000 V Enable

UAL

RANGE

range

is selected manually, the ran

grounded through the

ge

appropriate Ran

Relay Driver.

grounded, the output

Mn

Enable

range selection becau

B output to be

lin

e is now

SELECTION

RANGE

switch, turning on the

signal

HIGH

.

ge

of Inv

is

LOW

er

relays only

LOW

and D output

LOW, se

Enable line

Selection

Range

of

range

-5

shows

OHMS

es

be

LOW

be

of

the

erter A

. This

se

output

lecting

1000V

(1

000

Kn)

ENA9LE

of Highest

for response time autorange command, and Trigger command. command diagram of the

is

appLied

Range

.

of

the amplifier.

may

At

the end

Thi

s delay follows each

also

follow

of

the delay period, a trigger

to the 3480A/B trigger circuit. A block

Delay

Generator and associated circuits

shown in Figure 4-6.

4-33.

Autorange

When

an

Register, the same si changing the state this flip-flop opens a transistor switch to a

is

itance to begin charging. The total value

Delay.

autorange command is ap

gnal

is applied

of

the Delay Flip-Flop. An output from

to

pli

ed to the

the Del

of

this capacitance, and hence the charging time constant, depends function and the degree Wh

en the capa

citance

of

filtering that

has charg

have

ed to the prop relaxation oscillator produces a pulse which resets the Delay

Flip-Flop. The De

the

Manual

and Delayed

3480A/B to take another

4-

34. External

When

the

Trigger Delay.

EXT

TRIG DELAY jumper on the

Function Assembly

trigger command at the External Tri

lay

Flip-Flop output then triggers

Trigge

r Circuit, wh

meas

urement.

A3

is connected in the IN position, a

gger

input ca Delay Flip-Flop to change state. This results delay between the time the External given

and the time a trigger command

Trigger

is

3480A/B Sample Generator circuit. Again, the length

delay depends on the function and the degree of

is

selected.

4-35.

Hold

Circuit.

1000 v (1000

RELAY

an

l(fl)

DRIVE

External

Range

ay

Generator ,

ll

ow

a capac-

on

the

been selected.

er

voltage, a

ich

causes the

Range

and

uses

the

in

a prescribed

command is

applied to the

of

the

filtering

-..

is

-

4-32.

DELAY

CIRCUITS.

The

Delay

4-6

GENERATOR

AND

SAMPLE

CONTROL

Generator provides sufficient delay time to allow

When

the autorange command changes the state Delay Flip-Flop, the Hold Circuit. A

places the

an

3480A/B

output from the flip-flop is applied

LOW

output from the Ho

in a HOLD

condition until after the

of

the

to

ld Circuit

Model 3484A

DELAYED

TRI

GGER

INITIA

+SV

AU

TO RANGE

COMMAND

AUTO

ENABLE

DELA

Y ENABLE

34

84

A B 30381

Delay Generator H

OLD

conruti

during an autoran

4-36. Print

An

output from the Delay Flip-Flip

causes

on

prevenls the 3480A/B from samp

ge

Command

TE

OELAY

fLIP HOP

anolher sample to

cycle.

Circuit

.

VARIABLE

DELAY

fUN

CllON

ANO

FILTER

SELECTION

Figure

RELAXAT

ION

OSCILLA

TOR

4-6. Delay Generator Block Diagram

be

initiated. This

lin

goes

to the Print Command Circuit. During an autorange cycle, the output the Print Command b

egi

nning

of

the samp

period.

measurement

Thjs

prevents a recorder from printing

after a

reading during an a

Tri

gge

r.

delay, the Print Command

egin

b

ning of

the delay period and remains HIGH until after

the measurement

4-37.

Manual

and

4-38. When the TRIG pushbutton

the

Manual

bu

tton is released, the flip-Jlop output returns to

r

es

ulting in a pul

Trigger Flip-Flop

turns on the output transistor

Circu

it output goes

le per

iod and re

has been utoran

ha

s been taken.

Delayed

taken at the end

ge

cycle. During

Trigger

goes

se

through a coupling capacitor.

mains HI

signal

goes

Circuit.

is

pressed , t

LOW. Wh

for

approximately 120

HIGH

al the

GH until

of

the del

an

erroneous

an

External

HIGH

at the

he

output

en the push-

HIGH

Tru

s pulse

ay

microseconds. The resultant negative-going output pulse is the tri

gger

command to the 3480A/B Sample Generator

Circuit.

4-39. During a delayed tri autorange command or a delayed External Tri

mand,

an

output from the Delay Flip-Flop performs the

sa

me electrical function as pr While the Delay the Tri

gge

Flip-Flop output

r circu

it

Flip-Flop is reset, a t

0A

/B.

348

gger

cycle, initiated either

essi

ng the TRIG pushbutton.

is

LOW

, the capacitor

is

gro

unded. Then when the Del

rigger

command is applied to the

by

an

gger com-

ay

HO

LD

CI

RCU

IT

To

3'BOA/B

MANUAL AN

DELAY TR

IGGER

CIRCUIT

ED

O

- TOJ480A

il

.

4-40.

Delay

and

Exte

rnal

Tri

gger Ga

ting.

g

441

. The Delay and External Trigger Gating circuits are shown in Figure 4 on Ran OUT output Delay Enable

of

Flip-Flop. HIGH, Tri

ge

and Funct ion Assembly

position, the output

of

the Delayed Tri

Al

aJJowing

gge

r input.

-7. When the EXT TRJG DE A3

is conn

of

signal

gger

is HIGH

Inverter Dis

Gate HIGH. In addition, t

, disabling the

LOW

so, one input to the Trigger Command Gate

this gate to be controlJed by the External

442. Assume that the instrument is between sample (Print Comm

Extern Trigger com go

HIGH

LOW

. At the same time, the External Trigger Com applied to the be

gin to

soon

of

,

as

of Inverter B, this output Command Gate output to capacitor is approximately 55

microseco Command 3480 A/B

4

43. HIGH. Inv Command Gate output

LOW and the Tri

Co

nsequently,

ing a sampl

3480A/B.

in

444.

the IN p

and sig

al

Tri

gger

mand

, and the

go HIGH, cha

the capacitor h

nd

Ga

nal

is

LOW)

Command

imm

eruate

is

applied. The

ly

causes Inverter C output to

Trigger Command

Pri

nt Command Gate cau

rgin

g the capacitor

as charge

goes

LOW

HI

GH. T

55

microseconds. The resulting

negative-goi

te constitut

ng

pul

es

a trigger command to the

Sample Generator.

Duri

ng

a sample period, The Print Command signal

erter A output

gger

an

Exte

is

then

HI

GH. Inverter B output is then

Command output remains HIGH.

rnal

Tri

gge

e period is prevented from tri

When the

EXT

TRJG DE

LAY

osition, the Delay Enable

when a negativ

Gate output

ses

d to the threshold volt

, returning the Tr

he delay caused by t

se

output of the

LOW

, holding the Print

r Command a

jumper is connected

signal

is

Section IV

TO

EXTERNAL

TRI

GGER

GATI

LAY

ected

, ho

ldi

Delay

Generator

LOW

External

its output to

at

its output.

ppli

gge

rin

LOW, en

3'tOA/8

jumper

in the

ng the

e-going

goes

mand

age

igge

Tri

gge

ed dur-

g the

abling

he

is

s

As

r

he

r

is

in

4

-7

Section IV

PR

INT

COMMANOJ L

r-1

+5V

PRINT

COMMANO

GATE

Model

3484

A

IN

OUT

(

+5V

EXT

3484A

- 8 - 3038 2

Figure 4-7. Delay

the Delay Generator. In addit

is

Trigger Gate controlled the

by

Trigger Command Gate is LOW, holding

now

an

External Trigger

ion, one

HIGH, allowing this gate

input

input.

HIGH. An External Trigger Command samp

le periods) will Trigger Gate to go Delay Generator. Following

now

cause the

output

LOW for 55 microseconds, triggering

the

delay period, Generator causes a trigger command to be applied 3480

A/B. The External Trigger Command input is gated

the Print Command signal as

4-45.

ISOLATED

REMOTE

4-46. A typical Isolated Re

8.

4-

Isolation

is

provided act as a pulse transformer. connection

at

the Program I

Command is required This command must go from + 2.4 V or

less for a minimum

in

Paragraph 4-43.

OPTION

mot

by

a pair

In addition

to

accomplish isolated programmin

041.

e Circuit is shown

of

adjacent coils which

to

npu

t, a Program Acc

or

of

50 microseconds.

TRIG

OELAY

to

the Delayed

Also,

one

the

input

(between

of

the

in

a ground (LOW)

greater

to + 0.5

OE

ENABLE

and

to

be

input

to

output

Delayed

the

Delay

to

the

by

Figure

ept

g.

V

LAY

TRIGGER

COMM

ANO

GATE

OELAYEO

TRIGG

ER

GA

TE

TRIGGER

To

OELAYEO

T

RIGG

INITIATE

3480A/S

ER

External Trigger Gating.

4-4 7. Approximately 10 microseconds after

a Program Acce goes LOW, resetting the flip-flop microseconds later, Program J output

goes LOW. This negative-going transition

pt

nput

line is HIGH

Command, t he

the

~signal

(not

ACC

output

programmed), the gate

app

signal (Figure 4-

to

LOW.

goes HIGH.

through the capacitor and pulse transformer. Phase inversion occurs in pulse turns flip-flop, returning if

the Program

output

is forced through the pulse transformer. The flip-flop remains med

state.

4-48. A

is triggered

Flag goes HIGH a Program Accept Command, indi

the

transformer

on

the

transistor to change the state of

the

Program

Input

is

LOW

to

remain HIGH and no signal is coupled

LOW

, and the Program

Program Flag signal is pr

by

the

Program Accept Command. Program

about

30

microseconds after application

and

the

resulting positive

Output

to HlGH. However,

(programmed),

Output

is

oduced by

cat

ing receipt

output then

in

the

a one-shot

COMMAND

lication

Abo

If

is coupl

the

program·

of

ut

gate

that

of

8)

10

the

ed

the

of

this

,........

-

4-8

PROGRAM

I

NPUT

l

3484A-9-

!0319

ACC

Figure 4-8. Isolated Remote Program Circu

it.

PROGRAM

OUTPUT

Model

348

4A

Section IV

-

r.

OHMS/DC

CONVERTER

1

I

- -

e-;-

Re

- I

I

I I

I

L

I~

Rx

Fi

gure 4-9. Simplified Ohmmeter Diagram.

command. second later lo indicate co

4-

49.

4-50. The Ohms/OC converter supplies a constant current

to

the resistance being measured, resulting which const

supplied by the

adjusted for each ran f

ull

-scale resistance . In OHMS function, the DC Amplifier

ga

in is fixed at

the converter

4-5

l . Overload Prote

damage

input while the instrument

excessive volta

the relays in the resistor network the resis

4-52.

4-53. A block diagram

Program Fl

OHMS/DC

is

directly proportional

ant

current

JO

and amplifier.

to

the precision resistors by

ge

tor

circuits.

TRUE

RMS

RA

_______

....-

-------

I •

ag

goes

mp

CONVERTER

LOW

leti

on

OPTION

9Re

_J

-u

approximately I milli-

of

programming.

to the resistance. Th e

is deve

loped from the + 10 V ref

3480A/B, and the value

ge

to

produce a 1 V drop across a

. Figure 4-9 shows a

ct

ion is provided

si

mplifi

to

prevent accidental

an

is

in

OHMS

is a

ppB

cd, the protection circuit s cau

to

de-energize, opening

AC

CONVERTER

of

the True

OPTION

RMS

I

E

1N

To

3480A

/B

3484A

- B- 30383

042

.

in

a voltage drop

ere11ce

of

current is

ed

diagram

excessive volta

function. When

043

.

AC

Converter is

of

ge

se

shown in Figure the input is capacitively coupl mode the input is dir to measure the total

4-1

O.

In the V AC(AC) mode

ed;

ect

coupled, allowing the instrument

ems

value

while in the

of

a sign

of

operation,

VAC(OC}

al

containing both

ac and de.

4-54. The Attenuat

amplifier ha

vin

g a differential in

Amplifier

is

a broadband inverting

put

stage and a push-pull

or

output stage. Dual field effect transistors used in the input

so

stage are co nnected as

input impedance. Range switching is accomp

atten

varying the the P

ost

Attenuator.

4-55. The amp

lifier having a fixed gain differential sta co

uple

Prot

Amplifier

if the output voltages approaches a level wllich

might damage

uation

Post Ampl

ge

and a push-pull o

ection Circuit limits the output of the Post

the thermocouple.

4-56. The Converter Amplifier having a gain

of

1. This Converter Thermoco amplifier.

co

uple

half

Because

One half of the specially designed dual thermo-

is

used

to

convert the ac sign

is used in the de feedback loop

th

e thermocouple is a non-linear device, the two

sections arc used in this way so th

the non-linearity

of the input output. The ac feedback loop provide faster response time.

is

capacitor

response down

increased in the V AC(DC) mode to provide

to

J H

4-57 . The Output Filter is bypassed since ample filtering bly (A measured

I). Because frequencies as low as I Hz may be

in

the V AC(DC) mod e, the Outp

In addition, the F

co

upled inlo the filter to reduce response time. The True

RMS

AC

Converter

the

DC

Amplifier gain

urce-followers to maintain a high

of the Attenuator Amplifier and

ifi

er is a broadband non-inverting

of

10. This amplifier also has a utput

stage. The Thermo-

is

an

inverting de amplifier

is

the gain from therms

upl

e input to the

to

produce a linear amplifier

Th

e value

de

output

al

to de, and the other

of

the amplifier.

at

the feedback offsets

em

ploys an amplifier lo

of

the integrating

z.

in

the VAC(AC) m

is

supplied by the

il

ter Amplifier

output

is 0 t

(A2} is fixed

o+

Att

enuator A

ut

outpu

t (from A2)

1.5 V on a at

10

in bot

Filter

ll

li

shed by

value

of

the

of

the

ode

sse

m-

is

used.

ranges, and

h ac modes.

is

AC INP

UT

__, _ __,

FEEDBAC

AC

POST

ATTEN

K

Fi

gure 4·10. True

CONVERTER

THE RMOCOUPlE

RMS

Converter Block Diagram.

FEEOBACK

Fil TER

l484A

TO

OC

AMPUfl[R I

01

· l - 30 H17

0 • I

SV

A21

4-9

Section V

Model 348

4A

Table 5-1.

I

NSTRUMENT

TYPE

Digital

Voltmeter

DC

Standard

Variable

Osci

AC

Resistors

Precision Resistors Resistance: Calibrated Performance Checks

Line

Transformer

ll

ator

Voltmeter

(See Par. 5-

20)

REQUIRED

CH

ARACTERIST

Calibrated

speci

Voltage Range: 0Accuracy: 0.005

Output

103 (or

Frequency: 50Output

Accuracy

Must

10

1megohm1 1kilohm5

100

10

100

10

to

fi

cations

Voltage:

to

127

Vac

207

to

253

Voltage:

: 3% Performance Checks

be

floating

megohm 1%

ohms

1

kilohm kilohms kilohms

1 megohm

megohms 0.

%

Required

ICS

1000

V Performance Checks

%

Vac)

60

Hz Performance Checks

10

V peak

within: O.Q15%

0.

005

%

0.

005

%

0.

005

%

0.005

%

025

%

Test

Equipment

USE

A

ll

opera

tion

Adjustments

T

rou

bleshooting

Performance Checks

Performance Checks Troubleshooting

Adjustments

(Option 042)

.

s

RECOMMENDED

MODEL

-hp-

Model

3480A

or

34806

-

hp-

Model

DC

Differential

Superior

Power (for 115 V line)

3PF2

-hp-

Wide Range Oscill

-hpVoltmete

-hp-

-

hp-0698-7332,

-hp·

J

ulie

Laborato NB-102 NB-103

NB-104 NB-105

NB-106 NB-107

7408

Standard/

Voltmeter

Electric

stat

3PF116

16

(for

230 V lin

Model

200CD

Model

427A

r

0698-7091,

0683-1025,

Research

ries, Inc.

Co.

ato

10 1 M 1 K

M

e)

r

-

'

DC

Voltmeter

DC

Differont

Voltmeter

Oscilloscope

Range:

100

mV

to

300 V full

Must

be

floating

ial Resolution: 0.1

Accuracy

Bandwidth: Sensi Sweep: 0.1

tivity:

: 0.

005

de

0.005 V /cm ms/cm

full

scale T

mV

%

to

450

kHz

Adjustments

roub

loshooti ng

Adjustments Troubleshooting

Troubleshooting

-hp-

Model 412A

DC

Vacuum

Voltmeter

-hp-

Model DC Voltmeter

-hpOscilloscope wi

-hpand 1421 A

3420A/B

Differentia

Model

Tube

140A

1401 A

plug-in

l

th

s

-

5-0

\

Model

3484A

Section V

--

.__

5-

1.

INTRODUCTION.

This

seclion Model Perform sh

ooting

5-2.

R

ecommended

ing the perfor man

-1

. Tesl instruments other than those listed may be used

5

th

eir specifications equal or exceed the required chara

istics.

5-3.

Use

the

Model 3484A. The

ment 230 Vac) otherwise

th

for

that the performance

receipt and Check Card is provided

recording

removed from of

the check. any Adjustm cedure , Paragraph 5-34.

contains informati 3484A. The following paragraphs describe ance Chec

Procedures.

TEST

ks, Adjustme

EQUIPMENT

tesl equipme

ce

of

PERFORMANCE

following procedures to verify

sho

uld be

e following

incoming inspectio n

If

poi

nt enl

operated

and ambie

stated

at

the

the 348

in

nt temp

. A calibrated

per

formance checks.

90-day

performance

the manual and used

this procedure, refer

Pro

intervals thereafter.

4A

is

ced

ure,

on

necessary

nt

Proce

REQUIRED

nt

for maintaining and check-

the Model

3484

CHECKS.

3480

A/B/348

at

a line volta

eratu

re

of

3480A

of lhe 3484A

at

the

rear of

of

the

3484A. This

or

of

a routine performance

found

to

be out

or

to

the

to

main

dur

es,

and Troub

.

A is listed in Table

prop

er

operati

4A

and

ge

of

115 Vac

20°c

to

30°C

or

3480

8 is required

lt

is recomme nd

be checked

A Performan

this

secti

card

as

a permanen t record

of

specifi

to

Paragraph 5-13,

Troubleshooting Pro-

test equip-

SECTION

V

MAINTENANCE

5·

4.

VDC

lain the

unless

on

may

cat

ions

the

le-

cte

on

(or

ed

upon

for

be

The following proced ure checks the accuracy attenuator amplifier witllin spec

a.

if r-

of

b. Set 3

c.

d. Set

e.

ce

at

ACCURACY

and the accuracy and linearity

on all

ranges. The

ifi

cations .

Connect transformer connec

t de standard

480A

voltage

115

LO

Turn warm

100

TER

Short display is n ZE polarity indicator alternating Disconnect inp

to

V (

or

W.

on

3480

up

for one

3484A

mV, SAMPLE RATE fully clockwise, FIL-

to

OUT,

348

RO control for display

AND

LINEARITY

3480

A/B must be

Model

3480A/B/348

as shown

/B re

ar

be used. Set variable line transforme r to

230 V). Conn

A/B

hour.

FUNCTION to VDC, RANGE

TERMI

4A

input

ot

00.00

ut shor

in Figure 5-1 . Do not

to

348

4A.

panel 115/230

ecl

and test e

quipment

NAL

to FRONT.

HIGH to

mV, adjust

t.

CHECK.

4A

and

variable line

swit ch to the l

348

4A

GUARD

and allow

LOW.

If 34

3484A

of

00.00 mV, with

betwe

en

NOTE

A

numerical display other than zero when the input and d

terminals are open is normal

oes

not

indicate a zero offset.

of

operat

fro

of the de

80A/B

nt

panel

+and

the

ing

ine

to

- .

DC STANDARD/DIFFERENTIA

VOLTMETER

hp

7408

11~1°

@

OUTPUT

hp

L

DIGITAL VOLT

MULTIF

CABL

E

110558

Figure 5-1. VDC Accuracy Check.

UNCTION @ @ @ @

U

NIT

hp

3484A

hp

3480A

g©®@

METER

VARIABLE

TRANSFORMER

3484A- 6

30375

5-1

Section V

DC

STANDARD/DIFFERE

VOLTMETER

hp

7408

NTIAL

DIGITAL

Model

VOLTMETER

hp

3480A

3484A

-

®

OUTPUT

hp

3484A• B

3037

6

Figure 5-2.

nn

ect

de

f. Co

de standard display indicates

standard

output

to

an

offset, this must be taken

to

3484A

.000000 V.

If

consideration when checking 3484A accuracy the 100 used as de standard , adjust return 348

g.

Set (+ + 99.

h. Reverse polarity

should be

mV

0A/B

de standard

100.00

mV). 3480A/B display should be

97

mV

-99.

range.

display

to+

100.03 mV.

97

If

-hp- Model 740B is being 740B ZERO control to

to

zero.

output

of

standard

mV to -

100

to

output.

.03 mV.

+ .100000 V

CABLE

1

10558

inpu

348

Display

lnput

t.

Set

0A/B

into

on

Resistance Check.

Table 5-2.

STA

NDARD

DC

VOLTAGE

± 100.

000

90.000

80.000

70.000

60.000

50.

000

40.

000

30.

000

20.

000

10.000

mV mV mV mV mV mV mV mV

mV mV

± ± ± ±

± ± ±

±

MULTIFUNCTION @ @

UNIT

hp

3484A

O.I F

DCV

Accuracy and

3484A

RANGE

lOOmV 100

lOO lOOmV 100 100 1

00mV 100 mV lOOmV lOOmV

mV mV

0

Linearity

DISPLAY

±

99.97

±89.97

± 79.

97

±69.97

± 59.97

± 49.97 ±

39.98 ± 29.98 ± 19.98 ±09.98

@)

@ @

mV mV mV mV mV mV mV mV mV mV

Qi

Check.

LIMIT

to

100.03

to

90.03

to

80.03

to

70.03

to

60.03

to

50.03

to

40.02 mV

to

30.02

to

20.02

to 10.

@

02

-

S

mV mV mV mV mV mV

mV mV mV

i. Set

volta

de

standard

ges listed

in switch to range.shown for each voltage. Disp should be within

j. Rep

eat

Steps g through i with line voltages

10

3 V and 1

5-5.

voe

INPUT

5-6.

100

mV,

Input

resistance on the three lower ran

and is most easi

27

RESISTANCE

1000

mV,

ly

checked on

following procedure:

a. Connect de standard

Figure 5-2 , using a Th

e capac

itor

in

of

noise . Connect

RANGE

b. S

et

to

10

V, FUNCTION

de standard o

5-2

output to

Table 5-2, se

limits indicated

V (or

207

V and 253 V).

CHECK.

and

10 V Range

the

to

3484A input

10 MQ ± 1% res

parallel with

jump

er across

utput

to+

positive

ttin

g 34

and

84A

negative

RANGE

lay

in

each case.

s.

ges

is >

1010

ohms,

1 O V range using the

as shown in

istor

for

Rs·

Rs

reduces the effect

Rs·

Set

3484A

to

VDC.

10.000

V.

of

±

100.00

mV

±

300.00

mV

±

500.00

mV

±

700.00

mV

±

900.00

mV

± 1000.

00

mV

± 10.0000 v ±

9.

0000

v

±

7.0000 v

±

5.

0000

v

±

3.0000 v

±

1.

0000

v

±

10.000

v 100 v

± 100.000 v 100 v

±

1000.00

±

*If ·hp

voltage greater than - 500 V.

V* 1000 v ±

1

00.00

v 1000 v ± 099.9 v

- Model

7408

l OOOmV ± 10

00

1

000 1000 1000 1000

10V 10 10V 10 10 10

is used

099.9 mV mV mV mV mV

v

± 299.9 ± 499.8 ±

699.8 ±899.8 ±

999.8

±

9.998

±8.998 ±6.998

v ± 4.998 v

v v

as

±2.999 ±

0.999

±

09.99 v to 10.0

±99.98

999.8

de standard,

do

mV

to

mV

to

mV

to

mV

to

mV

to

mV

to

to 10.002 V

v

to

v

to

v

to to

v

to

v

to 100.02 V

v

to

v

to

not

apply

100.1

mV

300.1

mV

500.2

mV

700.2

mV

900.2

mV

1000

.2

mV

9.002

v

7.002 v

5.002 v

3.00

1 v

1.001 v 1 v

1000.2 V

100.1 v

negative

-

Model

3484A

DC

STANDARD/DIFFERENTIAL

VOLTMETER

hp

740B

DIGITAL VOLTMETER

hp

3480A

Section V

@[

@

~@@@@@@

HBOA

· 8 -

30377

c. Note

d. Remove

5-

7.

100 V and

Input

resistance and may be checked following procedure.

3480A/

about should (0.009 of

0.01 V (10 counts) indicates an

of

only

B display.

jumper

5 seconds for capacitor

then

V)

from display

io10

Rinput = Rs

1000 V Ranges

on

the

][~]

0

0t~

OUTPUT CABLE

across

10

differ

ohms, using

Einput -

~Edi

two

higher ranges

on

the 100

not

noted

the

splayed

.

-

@(

JJ

@ (

hp

11

055

8

Figure 5-3.

Mn

resistor and allow

to

charge. Display

more than 9 counts

in

Step

C. A change

input

formula

~Edisplaycd

is

10 Mn± 0.1 %,

V range, using the

l

DC

Common Mode Rejection Check.

resistance

CONNECTED TO 8

CHASSIS GRO U

b.

c. Connect

d.

ND

@@@@

D

@)

@

@)

0

Set 3484A FUNCTION

3480A/B display.

Note

de

standard

in

Figure 5-3, connecting output mounting screw head makes a good ground connection. Do ground.

Set

reading shou verifying de where

CM

to

de

standard

R =

3480A/B

not

ld

20

log

to

chassis ground. A rear panel

use BCD

output

not

common

Peak

Effect

MULTIFUNCTION

:..:.J.J

~

change more than 0.

hp

IK

to

VDC, RANGE to 10 V.

3480A/B

to

mode rejection >

common

/3484A

LOW

side

output

connector 113 as

+ 500.00 V. 3480A/B

on

reading (volts)

UNIT

3484A

as shown

of

standard

049

80

mode voltage

V,

dB,

a. Connect de standard

Figure 5-2, using a l

Connect jumper across

.I

00

V, FUNCTION

Set de standard

b.

c. Note 3480A/B display.

d. Remove jumper across 1

5·8.

DC

Effective

common

kn

unba

1

a. Connect a

should chan input Paragraph 5-6, Step

COMMON

common mode voltage

lance

LOW terminals, a

shown in Figure 5-3.

ge

resistance

MODE

mode rejection

in

either lead.

I

kn

to

3484A

Mn

Rs·

to

VDC.

output

to+

0.90 V to of

10

Mn ± 0.1 %. The formula

d,

applies

input

± 1 % resistor for

Set

3484A

10.000 V.

Mn resistor. Reading

0.92

in

this check also.

REJECTION

is

the

to

resultant error

resistor between

nd conn

ect

3484A

HIGH

as shown

in

Rs

RANGE

V, indicating an

CHECK

ratio

of

in

reading with

HlGH and

to

GUA

.

the peak

RD

to

in

as

5-9.

AC

·

Effective ac either position A filtering plus (See Paragraph 5-10.)

a. Conn e

b. Set

c. Connect oscillator

d.

COMMON

norma

and GUARD as shown in Figure

3484A

FILTER

chassis ground as shown

mo unti necti

ground.

Using ac voltmeter as a monitor, output voltmeter must

MODE

common

or

l mode rejection provided by the filter.

ct

a 1

LOW terminals, and con n

FUNCTION

to

OUT.

ng

screw head makes a good ground con-

on.

Do n

to

7.07

REJECTION

mode rejection with .FILTER in

B is the sum

kn

resi

stor

to

Note

3480A/B reading.

output

in

ot use

the

Vrms (10 V peak)

be

battery

CHECK

of

rejection

between

54.

VDC, RANGE

to

3484A HIGH and

Figure

54.

BCD connector J

operated.

.

without

3484A

ect

HIGH

to

A rear panel

set

osc

at

60

Hz.

HIGH

to

10 V,

l3

as

ill

ator

AC

5.3

Section V

W

IDE

OSCILLATOR

hp

Model 3484A

RANGE

200CD

F

igure

54.

e. 3480A/B reading should not change more than

0.001

V. This

of

80

dB

graph

S-8

5-10.

AC

NORMAL

AC

normal mode rejection

mode

voltage

a. Conn

b. Set 3484 A FUNCTI

to the resultant error

ect osc sistor, and in Figu

re

in

the oscillator output, and the low sou voltmeter must be battery operated.

FILTER to A

verifies ac common mode rejection

at

60

Hz, usi

ng

formula

, Step d.

MODE

ac

5-5. T

rce

REJECTION

is

the ratio

ill

ator, 1.0 µF capacitor,

voltmeter to 3484A input

he capacitor blocks any de present

impedance

.'

ON

.fo

to VDC,

CHECK

of

the peak nor

in

reading.

res

istor provides a

r the 3484A. T

RANGE to 10 V,

given

AC

Common Mode Rejection Check.

c. With oscillator turned off, note 3480A/B reading.

in

.

33

as

Para-

mal

kfi

shown

he

re-

ac

d. T

urn

Using ac voltmeter

outp

c. 3480

± 0

30 dB, using the formula

f.

Se

more than ± 0.001 V. This verifies no rejection

DIGITAL

oscillator on and adjust frequency to SO H

ut to 7 .07 Vrms (I 0 V peak).

A/

B reading shou

.3

16 V. T

NM

R =

t FILTER switch

of

VOLTME

hp

3480A

his

verifies norm

Peak

20

log -

80 dB, using the formula

TER

MU

as

a monitor, adjust oscillator

ld not

al

ac

superimposed voltage

--

-----

Effect on reading (volts)

to

B.

Readin

LTIFUNCTION

UNIT

hp

3484A

vary more than

mode rejection

gs

sho

uld not

in

--

rmal

Step e.

z.

of

vary

mode

54

WIDE RAN

OSCILLATO

hp

200CD

3

484A

· B· 30 3 7 4

GE

R

l. OµF

I(

Figure

5-5.

AC

VOLTMETER

hp

427A

a

MULTIFUNCTION

UNIT

hp

34

84 A

~r~

Normal Mode Rejection Check.

DIGITAL VOLTM

hp

3480A

ETER

Model

3484

A

5-11.

OHMMETER

Th

e following procedure prescribes full-scale value resistors for each range. values within ± absolute value tolerance given the abso Table 5·3. F 9, shou

lut

e value

976.J n is ld

be

9.976 kn± 2 counts.

a. Set

FILTER

terminals. Conn

ACCURACY

If exact full-scale valu

10

%

of

full-scale may be used, providing

of

each resistor is

in

Table 5-3. The display should

of

the resistor wjthin

or

exampl

e,

used

to

check

FUNCT

With in offset reading will play. This res presents internal wiring test be attempt the will result all ranges

.ION

to

OUT. Connect test leads to INPUT

ect

test

leads

strument

lead resistance. Some offset may al

noted

front

on

to

panel

in in

and

is

remove

CHECK.

es

arc

not

known

if

a resistor having a value

the

10

kn

to

OHM

S,

GUARD

shorted

on

the

correct measurements

functions.

to

NOT

E

together when the

the 1

be

noted

100

0 n range. Do

the

offset by adjusting

ZERO

contro

to

the

limits show n

range,

RANGE to

LOW.

00

n range, an

in

the

l.

To

within

the

availabl

then

dis·

and

not

do

e, the the

read

in

of

display

100

n ,

so

on

5-12.

VAC

ACCURACY

AC

voltage accuracy checks are given

Operating and Service

5·

13.

ADJUSTME

5-14. The following procedures sho uld

it

after that adjustment refe r to Figure 5-6 shows the location

5-15.

within specifi is 3480A. for this purpose. adjustments may botto adjustments must be made place. The connection

5-16. A

This procedure must gain and

has been determined from the Performance Checks

the

Model

3484A .is o

cannot

the Troubleshoo

The

Model 34

ca

tions.

required

so

that the

An

extender

be

m covers. Unl

input

unless specified otherwise.

DC AMPLIFIER

DJ USTM E NT

S.

attenuator

(OPTION

Manual.

043

NT PROCEDURES.

ut

of

specifications.

be

made

at

any

point

ting Procedure, Paragraph 5-34.

of

adjustments.

80A

or

3480B

If a 3480A

3484A

cable,

-hp- Model

If

a 34808 is used, access

gained

by

ess otherwise stated in

with

LOW terminal is used as a ground

ZERO

be

performed before making

adjustments.

used must be opera

is used,

may be

removing the

the

348

AND

Section V

).

in

the Model

be

performed only

in this procedure,

an extender cable

operated

1114

the

4A

11 I 53A

lf

the correct

outside the

8A, is available

to

the

3484

3480

B to p and

procedure,

guard covers

OFFSET CURR

amp

tin

A

aJJ

in

ENT

lifier

g

ort

test

b. Sh

c.

Conn Display

d.

Change RANGE together

Connect

e.

Di

sp

f. Set RANGE

Table 5-3, connecting appropriate resistor

leads. Display should

each case. FI

LTER A may greater r

eq

RAN

GE

100

1000

10 k

100

k

1000 k 1 M ± 0

10 M

leads together

ect I 00

lay should be

uired

Tab

RE

100 ± 0.01 1 k ± 10

k

100 k ± 0.005%

10

M ±0.025% 10.000 M

n ± 0.015% resistor

shou

ld

be

and

note offset.

1000

n ±

to

Due to

than

100

on

the

10

le

5·3. Ohmmeter Accuracy

I

NPUT

SISTA

NCE

5%

0.005%

±0.005%

.005%

and

(100.00

to

(1000.0 n +offset)±

remaining positions

noise generated in

be required for quiet readings

kn, Mn

n +

1000

0.002

% resistor to test leads.

be

within limits shown in

and

range.

DISPLAY LIMIT

(100.00 + (1000.0 + o

10.000

100.00

1000.0 k

note

offset.

to

test leads.

offset)

n .

FILTER B may

k ± 2 k ± 2

± 7 counts.

Short

Check.

test

as

shown

the

offset)

± 7 counts

ff

set) ± 2 counts

cou

nts

counts

2 counts.

to

resi

S

± 2 counts

±

11

counts

leads

in

test

stor,

be

a. Turn

b. Set

c. Adjust

d. Adjust

e. Adjust front panel

3480

hour.

3484A

100

mV, SAMPLE

TER

to

GUARD

front

center.

COARSE

display

with po and

of

larity

- .

A/B

on

and

FUNCTION

OUT

, TERMINAL

to

LOW and sh

panel ZERO

ZERO

00.00 ± 00.02 ZE

ind

icator alternating between +

RATE

RO

@:03

BE CARE PO

INT COVER WHEN MAKING MEAS MENTS FOLLO

THE GUA TO

M

ETER PROBE, THE GUA MAY BE REMOVED MEASURE

FUL

NOT

OR CIRC

UIT

OR ADJUSTMENTS.

WING S

ACCO

TEP

RD

COV

MMODATE THE

MENT

ONL

allow

to

warm

to

VDC RAN

fully clockwise, F IL-

to

FRONT. Connect

ort

HIGH

to

LOW.

control to

(A2R7)

mV.

for display

for

of00.00

TO SHORT TEST

S TO

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, IF

THE

HOLE

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IS

TOO SMALL

VOLT-

RD

COVER

FOR TH

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up

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to

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3480A/

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BEFORE

CAUTION I

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SERVICING

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100

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Model 3484A

1

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HANDLING

.

TS

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TO

A1

RS

0

TOP

GUARD

VIEW

COVER

REMOVED

5-6

Figure 5-6. Location

of

Adjustments.

Model 3484A

f.

Connect a de voltmeter between V SET test point and input than reading meter.

g.

Remove 3480 A/B ferential voltmeter (or digital voltmeter able resolve 200 in 3480A/

LOW

. Voltmeter reading should be less

50 mV. If not, adjust V SET (A2R25) for

of less

than 50 mV. Disconnect de volt·

top

cover. Connect a de dif·

µV)

between i

B.

nput

LOW

to

and A3TP4

1. Adjust l 000

betweenn + 999.9 mV

j. Reverse polarity

play should alternate between - 999.9

- 1000.0 mV. 1( not, adjust 1000 mV {A2R39) slig

htly to split difference between positive and

negati

5-18. DC

ATTENUATOR

mV

ve

indications.

Section

(A2R39) for display alternating

and+

1000.0 mV.

of

input

(to

- 999.95 mV). Dis· mV

and

ADJUSTMENT.

V

h. Mechanically center front panel ZERO and adjust

COARSE ZERO (A2R7) for differential voltmeter reading

i. Set FILTER switch

reading is greater than CU

j.

Observe differential voltmeter reading while sw Di

± 200 µV.

5-17.

DC

Amplifier zero adjustment, Paragraph 5·16, must be performed before proceeding with amplifier gain adjustments.

a. Connect a de standard

3484A GUARD voltmeter (or digital input HI

Set 3484A RANGE

b.

clockwise,

c. Adjust de standa rd out

ential voltmeter reading should be reading is greater than ±

shooting Procedures, Paragraph 5-34.

d. Repeat Step C with - 10.0000 V input. Dis·

connect differential voltmeter.

of<±

200

µV

.

to

B.

If

differential voltmeter

± 200 µV , adjust OFFSET

RRENT (A2R58) for reading

it

ching FILTER

fferential voltmeter should remain within

If

not, repeat Steps c through

AMPLIFIER

GH

and A3TP4

FILTER to OUT.

through OUT, A, and B.

GAIN

ADJUSTMENTS

to

3484A input. Connect

to

LOW

. Connect a de differential

vo

ltmeter) between 3484A

is

3480A/B.

to

10

V,

put

to+

400

of

< ± 200 µV.

j.

.

SAMP

LE RATE fully

10.0000 V. Differ· <±

400

µV,

refer

to

Trouble·

µV.

If

Amplifier zero and gain adjustments must be performed

before adjusting attenuator.

a. With de standard connected

Paragraph adjust de standard output

5-

DO

NOT

V MAY A

100 GUARD

17, set 3482A RANGE to 100 V and

I

WARNING

TOUCH

COVER

to

3484A input

to+

99.995

GUARD

PPEAR

AND INS

V.

I

COVER

BETWEEN

TRUME

NT

as

.

in

FRAME.

b. Adjust 100 V {Al RS) for display alterna ting

tween+

c. Perform de accuracy and linearity check outlined

in Paragra

5-19.

OHMS

99.99 V and + 100.00

ph

5-4.

CONVERTER

ADJUSTMENTS

V.

be·

(OPTION

042).

5-20. The following procedure uses full-sca

resistors, listed in Table

ments. If exact full within ± 10% absolute value tolerance

to

made

5-21. The DC Amplifier adjustments should be made before performing the following procedure. Test leads should be

given

the abso

as

short

of full

of

in Table 5-1. Adjustment should then be

.lute value

5-1, for Ohms Converter adjust-

-sca

le valu

es

are

-scale may be used, providing the

each resistor is known

of

the resistor.

as

possible

to

minimize lead resistance.

le value input

not

available, values

to

within the

e. Adjust de standard

3484A RANGE

f. Adjust 100 mV (A2R38) for 3480A/B display

ternating

a l + 100.00 mV.

g.

Reverse input polarity (to - 99.995 mV). Display

should

- 100. slightly

and negative indications.

h.

Set 3484A RANGE

standard

alternate between - 99.99 mV and

00

mV.

to

split the difference between positive

ou

tput

output

to

100

between

If

not, adjust 100 mV {A2R38)

to+

999.95 mV.

to

+ 99.995

mV.

+

99.99

to

1000 mV. Adjust de

mV

mV.

Set

and

a.

Set 3484A FUNCTION

100 n, FILTER

.input HlGH and

LOW.

b. Sh

ort

test leads together and note offset reading in

3480A/B display.

With test leads shorted together when instrument is offset reading

play. This represents internal wiring and

test lead resistance.

to

OHMS

, RANGE

to

OUT. Connect test leads

LOW

and connect GUARD

NOTE

on

the 100 n range, an

will

be noted in the dis·

So

me offset may al

to to to

the

so

5.7

Se

ction V

Model 348

4A

Apply

heat

at a time. Do

SOLDERI

to component side

not

remove

old solder

RI

GHT

AN

GLE

IRON

of

board and

NG

from

hole

remov

.

PR

e one lead

ETI

NNED

be noted on the 1000 n

att

empt to remove

pan

front

el ZERO contro

result in incorre

ran

ges

and functions.

Connect test leads to 100 n resisto

c.

offset by adju sting the

ct measurement

ran

ge.

l.

To do so

Do

not

will

s on

r.

Adjust R 15

100 n ADJ for a display of 100.00 n plus the offset noted in

d.

Set RANGE to 1000 n . Short test leads together

not

and

e. Conne

1 K

e o

ct test le

ADJ

noted in

f.

Set RANGE to I 0

JO

kn resisto

of

I 0.000 k

g.

Set RANGE to 100 kn, FILTER to test leads to 1

l

OOK

ADJ for display

h. Set RANGE to 1000 kn. Connect te

Mn resistor. Adjust R8

1

1000.0

of

Step b.

ffset.

ads to 1000 n resistor. Adjust R l

for display of I

000

.0 n plus the offset

Step d.

kn. Conn

r.

Adjust RI 2

ect test leads to

IOK

ADJ

n.

00

kn res

of

istor. Adjust

100.

00

lOOOK

kn.

ADJ for display

kn.

for display

A.

Connect

st

leads to

all

RS

To repl

ace two-lead components,

and

tin

ends (away Bend one lead at a angle.

Solder of board a and solder so

lder

To

replace a three-lead

and

tin bent leads of

board

board.

the l

nd

pushing lead

other

direc

tly

PRE TINNE

ends. Bend t

one

. Be

nd

to the

at a time

compone

Figure 5-7. Component Re

from vicinity right

angle and

atte

r lead f

lead in

into

the

printed circuit

D

component,

wo

leads by nt

cut

of

the

irst

by

heating

hole

. Push

same manner.

board.

cut

at

nearly

app

lyi

ng heat

up

and sol

leads

to

printed

other

component side

component

leads

to

right

to

component

der

remain i

pla

cement.

proper

circuit

at

an obtuse

Do

not a

proper

angle

ng

length

board).

down

pply

length

s. Sol

lead

der side into

i. Set RANGE to 10

10 Mn, a FILTER B setting

es

ponse time

R

slower

).

Adjust R26

0.000 Mn. Movement

I

c

au

5-

22.

Pr

ocedur

se the dis

TER

is

making ad

TRUE

RMS

es

for adjusting the ac converter are

pla

set to A. Allow display to settle before

ju

stment.

AC

CONVERTER

Model l 1153A Operating and Se

5-2

3.

SERVICING

5-24.

CLEAN

5-2

5. Most areas within the 348

INFORMATION

HANDLING

Mn.

(For

quiet readin

may

be required.

will

then be correspondingly lOM ADJ for display of

of

hands or test leads may

y to change, particularly

ADJUSTMENTS

giv

rvi

ce

Manual.

.

TECHNIQUES

4A

.

must be ke

pt

gs

at

if

FIL-

.

en in the

free from dirt or contamination , or performance of the instrument will be degraded. The assemblies and the Range, Filter, and Terminal s es

pecially critical areas. These parts should be handled only

with clean rubber

ir

printed c only the edges

5-26.

assembly

cuit boards may be handled without glov

of the boards are touched.

If

the black thermal cover on the

is

removed, care must be

ment to dress the wires carefully thro

or cott

DC

Attenuator and Amplifier

on glov

es

or clean tools. The

DC

tak

en during replace-

ugh

the slotted edg

wi

tches are

es

Amplifier

es

of the cover. Make sure the twisted wires remain tightly

if

5-8

Model

3484A

Section V

twisted. Dirt or contamination on the surface gla

ss-enc

input

losed 20 kilomegol

resis

tance on the thr

un

resistor will tend to reduce

ee

lower ranges. Teflon parts on

any assembly must not be touched with the hands.

5-27. Component

The following general rules should be obser replacing com assemblies or the upper left quarter of the Ran Figure

5-7

Replacement

pon

ents on the Att enuator and Amplifier

illustrat

es

methods for avoiding contamination

.

ved when

ge

asse

when replacing components on a clean assembly.

I . Handle components and

glov

es

or clean tools, or handle printed circuit boards

by

touching on

ly

the edges.

asse

mbli

es

only with clean

2. Lay printed circuit board on a clean surface, prefe

rably a hard, flat surface.

3. Do not u

board; flux will

se solder on or near the printed circuit

contaminate the surface.

Com leads should be tinned away from the vicinity board.

4. Do n

ot

the hol

use

e.

a solder

removing tool.

Leav

e old solder

of

the

mbl

y.

ponent

of

the

in

5.

The soldering iron should be cleaned before each u

by

wiping on a wet spon

6. Always apply solde

of

printed circuit board.

5·28.

REED

REPLACEMENT

5-29. Recd switch

rubber glov

es

or

finger cots must be worn, or the reed must

es

must be handled very carefully. Clean

ge.

rin

g iron heat to component side

.

se

be handled by the metal leads only. When replacing reed switches, be careful not to bend t leads may break the

inoperative. The leads

glass

sea

of most replacement reed switches

he

l or ca

leads. Stress on the

use

the

swi

tch to be

must be shortened by cutting an equal amount from each

lead,

so

that the total length

pliers to hold the lead between the

cutting tool to

5-30. Some reeds

avoi

d damaging the

in

the 3484A are soldered

others are inserted into spring

is

I·

7/16

inches.

Use

longnose

glass

envelope and the

glass

to metal seal.

in

place, while

cli

ps. A special tool, -hp· Part No. 4040-0720, is provided with the 3484A for the purpose of

remo

ving

and replacing reed switches which

spring clips. Figu

re

5-8

shows the proper u

se

of

the reed

use

the

replacement tool.

5-31.

DC

CHANGE

AMPLIFIER

.

ASSEMBLY

REPAIR

AND EX·

3482A·

B-303~2

5-32. Certain components associated with the differential amplifier stage are factory selected to provide prop operation A21

Cl,

A2Q2, A2Q

of

the amplifier und

8,

er

temperature variations. Jf

or A2Ql4 , for example, must be

er

Fi

gure 5·8. Reed R

emoval

and Replace

ment.

5-9

Section V

replaced, repeated. This pr temp peratures. For this reason, should be returned to components

the shad

in

era

the

com

ponent selecti

oce

dure requires extensive tests using a

ture

controlled chamber and widely v

the

must

be replaced. The critical parts are

ed

areas

of

the

on

th

e Amplifier Assembly

factory

component locat

procedure must be

if

any

of

ion

Figure 7-3.

5-33. A factory rebuilt and tested assembly, 03482-69502

P

-hpyour Appendix B, for

5-

34.

, may be purchased

art

No.

of

a new assembly is

on

an exchange basis. The

034

82-66502. C

nearest -hp-Sales and Service Offi

exc

han

ge

details

and

prices.

TROUBLESHOOTING.

ary

ing tem-

A2

these

crit

ical

show

drawing in

hp

- Part No.

ontact

ce, listed in

th

e Adjustment Pro

in

the

source

5-38. At

n

I/ I

is present across

attenuator n

ot

Figure 7-3,

1000

ced

ures in Paragraph

fo llowin g paragraphs and Table 54

of

trouble.

ten

00

uation is l / l in

in the I

00

attenuator

relays

V and I

do

not

000

resist

opera

the

V ranges.

ors

te

properly ,

be correct. For example, referring

if

Al

K3 remains closed

mV,

and 10 V ranges, t

Table 5-4. DC Amplifier Gain Errors.

S

YMPTOM

he disp

PROBABLE

Model

5-13,

informati

sho

uld l

ocate

three lowe

or

r ranges

If

leakage resistance

reed co

ntact

attenuation will

to

schematic diagram

on the

lay will be approxi-

CAU

SE

3484A

s, or if

100

on

the

and

mV ,

If

the Model cannot graph 5-13,

hou

ld be used

s

troubl

eshooting procedures will

trouble is in

loose wires

or

loose boards are sea troublesh according

3484A

be corrected

the

following tro ubleshooting informatio n

to locate

the

348

or other obvious evidence

burned

ooting

components.

ted

properly in connectors. In general,

information is identifi

to the symptoms

BEFORE WORKING

3484

A,

REFER CLEAN DI

RT

OR

INTERIOR

DE

PERFORMANCE.

by

performing the Amplifier Zero

en

in the Zero

5-35.

If the correct Current ce

dur

e giv

Figu

re

G RA

DC

AMPLIFIER

instrument

ed

Adjustments

5-12.

operates incorrectly

by

the

Adjustment Pro

the

source

help

4A

or

the 3480A/B. Also ch

and the trouble

of

dete rmine

of

trouble,

Make sure that

ed

by

experienced.

WITHI

N T

TO

PARAGRAPH

HANDLING

CONT

AMINATION IN

OF

THE

ZERO OFFSET

TE

CHNIQUES.

3484

A MAY DE-

.

exhibits a zero offset th

in

Paragraph 5-16, follow

Off

set

Troublesh

cedures, Para-

troubl

e.

The

if

the

eck

for

such as

printed

circuit

the

assembly

and

HE

5-2

4,

THE

at

cann

ot

and

Offset

the

pro-

oot

ing Tree,

be

Readings are high

mittently 1000

Readings are

mittently

and

Readings are l

range only.

Readings on

1000 are correct

high)

mV

range

high (or

high)

1000

V r

anges.

ow

100

mV and

approximate

value.

(or

inte

on

only.

int

er- High resistan

on

10

V

on 100

mV,

10

V rang

ly ha

lf

r· High resistance conn

A2K1 Connect of s check reed

nections are good, replace reed.

c

ing, trouble

A2K2.

Connect

of stress check reed connections. If connections are

mV

Leakage resistan

Disconnect eith reed switch. for this leakage across reed shield rected, A2K

Relay A 1 K3

es

of

clip

A2K

1.

tr

lip

Be careful

ess

on

reed. If displ

co

lead does n

may be

ce

clip

A2K2

. Be ca

on

reed. If displ

good,

See

reed remova l inst

cor

rects

or

coil.

perform

1.

may

lead across reed s

nnections. If con-

ot

connection

lead across reed

reful

ce

er end

troub

If

same check

remain closed.

ect

ion

in

relay

not

to

put

ay

is

correct,

correct

the

read-

in

A2R39.

in relay

ay

A2K

of

from

to

put

is

correct,

A2K2

ions.

reed

is

not

on

switc

1 or

not

replace reed.

across

Paragraph 5-25

ruct

le, check for

or

trouble

witc

If

cor-

h

If

h

2.

to

5-

36.

DCV

DISPLAY

Display condition where certain po occ amplifier. The first ch sh is in

5-

"limiting"

int,

but

ur

at

the

amplifier

oot

ing Tree, Figure 5-13, det ermines whet

the

3484A

37.

DC

AMPLIFIER

or

in

the

LIMITING.

is the te

the

will

not

eck

3480A/B.

GAIN

rm

display reads correctly

read higher. This limiting may

input

in the Limited Displ

ERRORS

If readings are consistently high

range,

and

the

trouble

cannot

be

5-10

used

or o

utput, or

or

corrected

.

low

to

her

on

by

describe

up

within

ay Troub

the troub

a certain

per

forming

to

the

le-

le

de

a

Readings are co

filter

OUT,

with

filter A or B or

L

ow

readings

a

nd

in

all filter

but

on

rrect

are

all

posit

with

low

rang

Leakage resistance across a filt

capac

itor

or

both.

ions.

to

coi volta at

juncti

8,

and 8 a equal A 1 R6. A l point right

ge

to ground

a

es

Leakage resistance across A 1 R2C

A 1 R fr

om reed

from

l or shield.

ge applied, check de voltages

ons of A 1

nd

9. Voltages should be

to

voltage

ower

(progressing

on schematic)

5.

Check A 1

to

coil or shield.

filter

With

R6

at

voltage

at

that

K3

an in

and

input

from

inc

point

for

er

relay reed

put

7.

7 and

end

of

at

any

left

to

icates leak-

.

leakage

or

-

.

M

odel 3484A

3482A-B-303

mately

R2C, two

5-39. on attenuation could from a reed

5-40. the relay reed

be

the

and

5-41.

half

and

higher

If

readings are

all ranges

be cau

The

feedback

low

and contact the gain will

DCV

DC

AMPLIFIER

GAIN•

RI

+R2

R2

54

Figure 5-9. DC Amplifier Diagram.

the

correct

R

S.

However

ranges.

with

is

occ

sed

to

relay

gain

of

resistance R I

when

the

gain will

resistance

REED

correct

the

urring in

by

leakage

shield.

the

reed

be

low.

RELAY

value,due

attenuation

DC Amplifier

should

be

becomes

to

the

altenuation

will

with

the

filter

filter swit

the

through

in Figure 5-9. Leakage across a

low.

ch

filter

circuit.

a filter ca p

is

adjusted

be

open

If a reed does

excessive,

CHECKS.

be

set

will

RI

correct

OUT,

to A or

This

of Rl,

on

the

but

low

problem

acitor

by

varying

cause

Rl

not

close,

or

will be high

5-44.

Some symptoms if a certain

modes

Driver circuit. However, if one for

(V

AC(AC) relay ci correct 100, circuit. correct incorrect, Annunciator

5-

45.

Tw

o general

Range Selecti

B,

certain all times. In

or

remote

remote automatica Figure 4-5

range

to

5-46.

If

the selection is Tree, Figure 5-14.

evident

of

selection,

function, that

function,

rcu

its

but

the

trouble On but

the

Remote

range

sel

ection

range program lin es is gro

lly selects

in

both volta

Autoran

instrument

troubles

range

the

and

.)

If

the

either

Lamp

Range Chec

types

on remotely,

either

exp

lain t

ge Chec

correct,

can

be

in

the

front

cannot

trouble

V AC(DC) functions use

the

numerical displ

cou

other

trouble

the

trouble

or

decimal

ld

be

hand,

the

decimal

is

Drivers

be

the

is

more

the F

either

probably

(Figure

k.

of

malfunction may

circuits. If

case,

inverters, A31

he

ge and ohms functions.

may

or

a range

the

highest range. Paragraph

method

k.

does

not

auto

refer

to

traced

panel display.

sel

ected

could

problem

unction

and

ay

in the

if

or

trouble

Cl

used

range properly

Autorange Tro

by

be

in the Range Rel

is

like

ly in t he range relays

Sel

fu n

ctio

is

off

by a factor

range relays

the

numerical display

function

in

the

7-5).

occur

be

impossible

may

remain

is p

and

5.

und

to select the high

Secti

on

V

analyz

ing

the

For

example,

any

of

the thr

ee ay

limited

ection the

n indications are

robab

lf

ed , the

to

only

Circuits.

same range

of

10

or

driver

indication is

Decimal and

in

the Remote

to

sel

ect

"selected"

ly in t he

none

of

3484A

4-29

but

manual

ubl

eshooting

or

at

the

and

est

is

a

In

many

cases, a

relay

by

interpreting

panel display. Table 5-5 lists a

and

the

probable

ranges

on each range problem defective relay drive circu as a

should

or

reed

5-

5-43. Selection that Driver sel RANGE connection series pair In autorange decoded Enable line in Figure 7-4 .

which

de

standard,

be

closed. Be careful

switch

42.

RANGING

range

which

ection

is

by

malfunction

causes.

which they

to

used

.

appear. Ch

determine

appears

is

required

to

determine

not

CHECKS.

of

any

to

be

LOW,

ene

rgizes

manual,

switch. In

of

to

the Enab

the Remote

inverters, causing

operation,

a series

be

of

LOW.

the

symptoms

Symptoms

which

on only

it. A known

for

to

apply

range causes

ena

bling

the app

le

remote

outputs

NAND gates

The

ranging logic circ

can

be

traced

to a faulty

evident

number

eck

one

these

whether

the

line

range selection, a

Program line is

the

of

such

are listed

for

each

ranges are

range

may

voltage source,

checks.

a recd

stress

to

the

Enable signal

associated Range Relay

ropriate

is

Enable

grounded

the

Ran

to

cause

line

reed relays. If

in

the

front

symptoms

with

symptom

affected.

be

due

An

ohmmeter

switch

is

open

leads

of

through

ground

applied

to

be

LOW.

ge Register

the

proper

uit

s are

shown

reed

the

on

Any

to

such

the

for

the

to

are

5-47.

5-48. 3480A/B from until amplifier has

a

Delay measurement.

5-49. Each Range R egister i the

the

filtering selected. main circuits,

5-50. De

The Delayed HIGH

a

the to

be

by

an aut check in

A3Q8

triggering.

DELAY

The

the instrument

Generator

Delay Flip-Fl delay period depends upon

parts;

and

Delay

HIGH

voltages

GENERATOR

purpose

settled. At

time

the

and

the

lay

Flip-Flop

Trigger I

eit

her t he

Gate must

in

order

orange

at these points.

would

If

the

of the Delay

sampling, follow i

has

had

the

resets

and

causes

an

autorange

nput,

this

same signal changes t

op,

initiating a del

The

Delay

Del

ay

Flip-Flop,

reset circui

t.

.

nitiate

signal

Aut

o Enable

be

LOW, causing

for

the Del

command.

also cause pin 3

flip-flop fails

If

CHECKS

time

end

Generator

ay the An

.

Generator

ng

to

command

ay period. The l

the

or

Flip-Fl

flip-

emitter-to-collector

to

is

an

autorange signal,

cha

nge ranges

of

the

3480A/

is present

function

consists

delay timing cap

at

A31

C6

Delay Enable

the

level

op

flop

be

LOW

trigger, no del

to

preve

and

delay

time,

B to

he

state

ength

and

degree

of

pin 2 must be

input to

at

pin 3 al

to

be

triggered

does

not

trigger,

and

prevent

ay

nt the

the the

take

at

the

three

acito

shor

will

a

of of of

r

so

t

-1

J

5

Section V Model 348

4A

-

RANGE

AFFECTE

1

1000

1

10

S

D

100mV

000

mV

100

v

100

mV

100

v

10

v Display is high

Display is l

Display

v

100

v Display

000

v

100mV 000

10

100

00

mV

v

on lower shorted. respond

Display increases input shorted.

co

Table 5-5. OCV Reed Relay Check

SYM

PTOM

ow

by a factor

is

high

by a factor

o;,pl>V

i•

low

by•'"'"'

Display

is t

ow

by

a factor

by a factor

is

high

Resistance {Paragraph 5-

Display increases erratically

rre

ctly to

by a factor

ranges) even with

Display

is

noi

correc

any

sy

tly

to

any

erraticall

Display does

input

voltage.

5)

and

input

S

of

10

of

10

of100

of

10

of

100

of 50.

is

200

{to OVERL

input

does not

voltage.

y even

not

respond

}

Input

kilohms.

with

OAD

s.

POSSIBLE CAUSES

A2K

1 sh

orted

A2K1

open

A2K2

shorted

A2K2

open

A 1 K 1 shorted

A1K1

open

A1K3

ope

n

00mV

1

1000

mV

10

v

100

v

1000

v

100

mV

10

00

mV

10

V

All

Ranges {Paragraph 5-5)

All

Ranges

All

Ranges

All

Ranges

All

Ranges

Display is input voltage. 5-5) is

Display

Inp (Paragraph 5-5).

Input

Display noise does not change regardless

of

Displ

with

Noise level Filter Che

evi

Noise level Filter

Check (Paragraph

on

approximate

200

is zero

ut resis

tan

resistance is

Filter

position selected.

ay

noise greater

Filter

A.

Fails

ck

{Paragraph 5-

dent

on 100

B. Fails

100

mV

Input

kilohms

for

ce

is

.

OUT

not

reduced

AC

mV

not

reduced

AC

range.

ly

one

resis

tance

.

any

input

10

megohms

10

megohms

than

and

+/-2

Input

sho

sufficient

Normal Mode

10).

Noise

range.

sufficiently

Normal

Mode

5-10).

Noise

-ha

lf

of

{Paragraph

voltage.

or

less

counts

rted

.

ly

in

Rejection

most

in

Rejection

most

evident

A7K

sho

Any

A

A 1

A

1,

rted

A 1

A1K5A both

one

1K4A

K3

Al

K2

1K

2 sh

A7K2,

K7

A1K7

open

or

, B, A

shorted

open

orte

or

A7K11

shorted

open

or B or

more

1K6

d

of

open

5-12

All

Ranges

Res

with

pon

Fil

se

ter

to

step

OUT

inp

ut

volt

age

.

too slow

A 1

K7

shorted

Model 3484A

Section V

occur, and the instrument

will

continue

to

sample at the

normal rate.

5-51. D

The delay introduced shown

VDC fully clockwise, the 4 msec delay obser delay observed. may be

selection logic circuits in the Delay Generator. The

elay

Timin

g.

in

each function and filter position

in

Table 5-6. With the FUNCTI

, FILTER

vin

g the Sample Indicator. However, the 200

of

to OUT, and the

Filter A and the J second delay

If the correct delay is n

in

the Filter

Sel

ection circuit

ON

SAM

PLE RATE control

wi

ll

no t

be

of

Filter B can be

ot

present, the trouble

or

switch set

noliced by

msec

in

the delay

follow-

to

ing procedure may be used to check the Delay Generator.

a.

Connect an oscilloscope

b.

Set 3484A F

UNCTION

to

test point DY.

to

VDC

, RANGE

to

AUTO, SAMPLE RATE fully clockwise, and

FILTER to

B.

c. Connect a jumper between the two test points

marked FR. This should cause the

in

strument to

autorange continuously.

d. Adjust oscilloscope controls so that length

delay (negative po determined.

e.

Set FILTER

Should be approximately I second.

rt

ion

of

waveform) can be

to

A.

Delay should be approximately

of

200 msec.

f.

Set FILTER

to

OUT. Delay should be abo

ut

4 msec.

g.

If

in

strument has

AC

Opt.io

n 043, set FUNCTION

to V AC(AC). FILTER setting is immaterial. Delay

should again be 1 second.

h.

Set FUNCTION to V AC(DC). Delay shou

ld

be

about 3 seconds.

autorange command occurs, whether the sampling is being con tro

ll

ed

automatically

Circuit o

utp

ut goes

triggered, and remains L

or

by external trigger. The Hold

LOW

when the Delay Flip-Flop

OW

until the flip-flop

output prevents the 3480A/B from sampling automatically.

is

Print Command signal is HIGH during the de lay period.

The This signa l is applied to a

triggering during t

sampling

p

ro

to

stop if the Delay Flip-Flop

perly. However, if the RANGE switch is set position other than Delay

Flip-Flop (A31

flip-flop. This allows the instrument to resu

5-53. IS

OLATED

REMOTE

his

AUTO

C6

ga

ting circuJt to prevent external

time. T

hese

conditions w

, the reset connec

3)

will

be

LOW

, resetting the

me

ASSEMBLY,

OPTION

5-54. The Isolated Remote option cannot be used unl the 3480A/B

is

equipped with Isolated

BCD which supplies power for the isolated circuits. If the + 5 V is

not present at the isolated circuits on Isolated Remote

A4

, t

he

Assembly

trouble is probably

in

the 3480A/B

the interconnections.

5-5

5. The Program Accept circuits provide the si which transfer the external programming information into the 3484A range and filter selection circuits. About after application of a signal on Remote Program Assembly Flip-Flop A4C9 the

/ACC/signal on assembly A4 sets the out put

outputs to LOW. The I 0 µ delay

. After

an

unprogrammed flip-flops to HIGH. Only the programmed lines arc l pr

ogramming in the 3484

the Pr

ogram Flag one-shot, causing its output to go HIGH

for

l mscc.

5-56.

OHMS

CONVERTER, OPTION 042.

A simplified diagram

Figu

re

5-11

, listing the resistors used in each range

develop the proper current thro

Program Accept command, the

AS

additional 10 µsec del

eft

LOW

A.

Thc/ACC/signal al

of

the Ohms Converter

ay

lo

accompli

ugh

the resistance being

resets a

is prov

provided by A4C8,

out sh

is

reset.

Tl~s

ill cau

is not rese

to

tion

to

the

sampling.

041.

ess

Option 004,

or

gna

JO

µsec

ACC

ll Program

ided by

of all

puts

of

the

the desired

so

triggers

is

shown

to

is

se

t

a

ls

in

Table 5-6. Delay

FUNCTI

5-52. De

If

lay

the Delay Generator rese

ON

AND

VDCorOHMS

Filter Filter Filter

VAC(AC)

VAC(DC)

Generator Reset Circui

function, the instr um

FILTER D

OUT A B

t circuit (A3Q6-8) does not

ent

will

Timing.

200

t.

stop

sampling when

ELAY

4 msec

msec

1

sec

1 sec

3

sec

an

.j482

A- 8-

Fi

303!)0

gure 5-10.

DC

Amplifier Input Connections.

5-13

Section V

measu

red. In some cases, more than one current path used. If trouble resistor

may

range, A6Q2 and A6Q4

is

not due to a faulty reed relay,

be the ca

use.

In aU ran

(Figu

re

7-7

ges ) are

except t

off

he

and A6Q3

an

open

10 Mn

is

is on, applying the + I 0 V REF voltage to the resistor network. on, divi down

5-57. Ohms Convert

ln

the

Ta

cau

pp

a

When the

JO

Mn range

is selected A6Q2 is turned

causing A6Q3 to be off and A2Q4 on. The resistive

der

made

up

of

A6R23-26 divid

to+ I Vat

most cases

fro

nt

pan

ble 5-

7 lists a number of symptoms and the probable

ses.

Symptoms a

ear.

Check each ran

A6TP1.

er

Reed

of

rec

d relay

el display wi

re listed with the

fai

ll

indicate which relay is at faul

ge

with

es

the reference voltage

Relay

Check

s.

lure, the symptoms evident in

ran

ges

on

whi

ch they

full-sca

le and I /I 0

-sca

t.

le

in put resistors to determine symptoms and the ranges

affected. Any pro may indicate a defective relay dri

± I 0%

of full these tests. R An

ohmmeter should be u

is

switch the leads

5-58. 5-59.

AU

open or closed. Be careful

of

FACTORY DC

AMPLIFIER

the factory selected components on t

es

the

sca

istor

reed

le

bl

em which appears on only one ra

ve

circuit. Resistors within

for

val

each ra

ues

nge

are needed to perform

mus

t be known to within 0

sed

to determin

e whether a reed

not

to apply str

switch.

SELECTED

COMPONENTS

.

ASSEMBLY A2.

he

DC

nge

.01

ess

Amplifie

%.

to

ci

Assembly are within the performance condition affect accuracy

fi

speci

of

the instrument under

s. Repl

acement

wi

th respect to temperature coefficient

cations. Therefore, if one

rcuits that are critical to the

of

any

of the

components on this assembly requi printed circuit assembly (A2) should be retu fac

tory.

See

Para

gra

ph

5-31 for repair a information. If it components in the field, the repl

as

value

5-

The value th not

the original.

60.

A6R7

*

of

e proper

ran

be

adjusted properly becau

A6R8, A6R7* decrease the va increase the

J

OO

kn.

5·61. A6R25

T

he

value

of

ge

for

ran

10 MEG

is

necessary to rep

A6R7*

valu

is selected to give A6R8, 1

ge

of

adjustment. If the 1000

may

be changed. If the display

lue of A6R7

*, and if the display

e. The value m

*.

A6R25*

ADJ

is

selected to pro

R26.

acement must be t

se

If

the 10 Mn

adjusted properly due to insufficient ra

A6 the value decrease the

r

R25* may be replace

of

A6R25*, and if the display

val

100

n.

d.

If

the displ

ue. The value may vary from 50 n to

Model 3484A

varying temperature

se components may

of

the

fac

tory selected

res repl

acemen

rne

nd

lace

one

kn

of ins

uffi

cient ran

ay

vary from I 0

vide

range

nge

ay

is

too low, increa

is too high,

t, the

d to the

exchan

ge

of

the

se

he sam

e

OOO

K ADJ,

ran

ge can-

ge

of

is too low,

is too high,

kn

to

the proper

cannot be

of A6R26,

se

RANGE

100 10

1

000

10 k 10 v 0

1

00

k

10

00

k 10 v 8.

10

M

• A second c icroa

1 m

mp curr

urr

ent s

ER

v

10

v {

10

v

1

upp

ent

supplied

ly

(RA • R6

I

~

Rx

0

(1)

9.1 k (Rl-

(2) 0

8

10 k (R4

91

M {R6-8}

8.

91 M (R6-8)

-8; R

is

not

sig

r;J

OHM

S!"DC

- -

CONVE

RT

ER I

E;-

I Rs I

I I

I

RA

I 9Re I

L

_______

.--------~u

RA

1 k (R13-1

1 k (R13·1

1

00

k ( R

1

00

k ( R 11, 1

00

k (Rll,1

(Rl1,12,22-24)

100 k 100k (Rll,12,22·2

22 -24)

is incident al

11

,5

E A

8

nifican

3)

R6

-8) 1

11

, 1

2,

t.

- I

Re

6)

, 1

2,22-24) 2,22

2,2

I

_J

E1N

-24) 9

2-2

4)

to the

To

3480A/

100 ohm

I •

B

348

4 A· B-

9R9

9 k (R1

0)

9 k (

R10

9

00

k (R9)

00

k (R

9)

9

00

k (R9) 1 900 k (R9) 900 k (R9)

range. The addi

)}

30383

tion

10 mA•

1

mA

0.1 mA 0µA

1

µA

0.1

µA

al

5-14

Figure 5-11. Ohms Conv

erter Resistance.

Model 3484A

Ta

ble

5-7.

Ohm

s Converter Reed Relay Checks.

Section V

RANGES

AFFECTED

1000

ooon

1

10

kO.

100

kfl

1

000

kO

1

0MO.

1

0000

10

kO.

1

00

kO

1

000

k!l

10

MO.

100

kO

1000.

1000

kfl

1

0MO.

1

0000

10

kO

1000

1

00

kO

1

000

kn

10M0.

1 M input 100

ohm

10 k input

1

000

ohm

1000 ohm

1 M i

nput

100

ohm

1

00 k input

100

k i

nput

1000

ohm

1 M

inpu

100

ohm input

10 k in

put

10 k input

SY

MPTOMS

reads

100

olitms

inp

ut

reads full

reads

1000 ohms

; "

'"'

~"''

input reads

00

kilohms

input

reads 0.1 % high

reads

1000 kilohms

megohm

input

reads

t reads

10

kilohms

reads 1 % high

reads

fu

II scale

megohm

scale

1 O

k;loh~

90%

of

full

}

scale

}

900

ohms

}

POSSIBLE CAUSES

A6K2

open

A6K2 shor

A6K3

A6K3 shorted

A6K4

A6K5

A6K5 short

ted

ope

n

open

shorted

open

ed

All

Ranges

1000

10000

10

kn

1

00

kO.

1000

kO

10M

0.

All

Ranges range, rea

ll

A

Ranges be

A

ll

Ra

nges

A ll

Ranges is e

Linearity 100 correct for

high

are On

100 nearly corr reads high.

Readings are high or

greater

1 M With full-sca

a

fact

Resistance being measured appears

in

Display is l inpu range 10 M range.

With

rratic and

input

· is bad.

ohm

range, readings

full

-scale i

towa

rd l

ohm

range, l

ect

but

input

reads

le i

din

gs

or of 10.

parallel

with

ow.

t va

ry

from

to

about 10% of full

input

open and

noi

resistance,

On all

ranges

are nearly

nputs.

ower

end

ower

readings a

full-scale

by a factor of

OVERLOAD.

nput

applied

are l

ow

by

10

megohms

Readings

about

50%

filt

sy. With a

display

for

er

is zero.

except

Readings

of range.

approximate

·scale on

out, disp ny

input

on

full-

on

re

10

each

to

sca

le

100 ohm

lay

)

}

ly

AGKG open

A2K

1 open

A2K2 shorted

A 1

K2orA7K1

s

horted

.

A 1

K3 shorted

A1K8orA6K open.

1

5-

15

I

(

II

MANUAL

MODEL

CHANGES

3484A

•

(

•Page 7-13.

•N

ew

ERRATA

•Page

Performance 1

000

Page 03484-01203 03484-01204

Pag Pan

Page 6-10 MPl MPl Mf'l MPl MP14 chan MPl MPl

or

Revised Item

5-6. Figure 5-6. change

mV

6-7. Change -hp-Part N

e 6-9. Ouletc

No

1 chilll!Jll to Port

2 change

2 ch;rnyc

4 change

4 change 4 change

Check Card. Change last

range t o ±

. 0811 2

. MP10 r.han'le

ge

Replace

1000

Hin

!1e:

AC

Hinge:

AC converter

A6R7

985

R : f

No. 03705060-!>9 5060 5950 5060 5060-5952 5060-5953 5060-5954

49

-5951

R6

MULTIFUNCTION

Manual

R33

(V

Set

Adj)

to

R25.

input

mV

. Page 7-5.

o.

con

and

xd

ww

10

Part No.

to

0370-0979

to

0370-0980

to

0370-0981

to

0370-098

to

0370-0983

to

0370-0984

and R7

and desc

verter asse

replace

4.45

0978

ription

mbly. left

assembly,

A6R6

megohms 0.01 %.

0340-0977

2

with

R6A, 4.45M

voltage

of Hinges to:

right

with

A6R6A,

and

Part

listed

for

R6B -hp

R6B, 4.45M.

No.

-

UNIT

03484-90000

•CHANGE

Page

6-2

4A, 4B, 5A, 5B,

2:

FOR

SERIAL NO.

. Change Part No.

6,

and 8 from

Add

separate

coils for

0975A00326

of

Coil:

9100-3216

A 1

K4B

AND

Electromagnetic

to

0491-0057

and A 1

K5B

ABOVE

for

.

as

follows

.

A1K2,

:

3,

CHANGE

Page

0.

082

Page larud

Page 6-6. ohms 10% 1/4 W.

Page

1:

FOR

SERIAL

6-2.

Change -hp- Part

microfarad

6-5.

s 20% 10

7-5. Change valui. of A 1

7-9. Add

-F-ro_m_I~21-

10%.

Add

A3C29 -hp

vdcw

.

Add

A3R40 ·hp

C29 and

----

pln3

--------...----"'-I-

C29

••

NO.

- Part No.

R40

1

975-00126

No.

of

C1 t'o 0.082

to

A3

schematic

- -

-:-"!

R40

220

A1C1

0180-0309

0684

AND

to

-2211 R ·

.

as

ABOVE

0160-362

C:

fxd

foll

ows:

mV

LAMP

To

Pl

.

3 C: f xd

4.7 micro-

comp

2 (

13)

220

CRl4

+20V

Add

new

A 1

component

~

UH/I

Page 6-11. Change Part No.

/,f'

L

location

l'or t No.

NO.

975-00326

drawing

OHMS COt-.I

CO

Al

0

~48

2

-

665

AND ABOVE

Rev

F'

of

Shield: Guard,

NN(CllO

0 1

.

YflH[R

N

top

to

03484-01205

.

11

December

1970

Supplement

A for

03484-90000

ZERO OFFSET TROUBLESHOOTING TREE

I.

The first step determines whether trouble is in or 3480A/B.

2.

If

the display will not

is

amplifier input 3480A/B.

3.

If

A2CR20 were shorted, amplifier input would be

about

+ 18

Vat

4.

If

A2CR26 were shorted, amplifier input would be

about

- 18 V at all times.

5. This step eliminates the Attenuator Assembly from the High

input

circuit paths.

High

input

circuit is probably all right.

6. If display goes removed from circuit, diode A2CR22 Display may could

not

be adjusted properly in previous step. After

replacing diode, perform Adjustment

Paragraph 5-13.

7.

If

display does not A2R52 not adjusted properly .in previous st ep. Reconnect A2R52 and proceed

8.

If

removed from circuit , diode Display may not be zero could

replacing diode, perform Adjustment graph 5-13.

9.

If

A2CR26 not be zero on lower ranges because zero could adjusted properly in previous step. Reconnect and proceed

10. This step substitutes a I megohm resistance in place the Attenuator Assembly. step, trouble

Connecting amplifier

11. INPUT Assembly. Assembly

12.

If

uator resistance, trouble relay coil filter positions may locate the faulty relay . The charts below closed

is

disconnected, A2CR22 is good. Display may

be zero on lower rang

to

display goes to (or near) zero when A2R55 is

not

be adjusted properly in previous step . After

display does not

is

disconnected, diode

to

LOW

If

is

apparently

zero adjusts with I megohm resistor replacing Atten-

to

the high circuit path. Switching ranges and

the

Attenuator schematic in Figure 7-3 list relays

in

the various ranges and filter positions.

grounded, there

all

times.

to

not

be zero on lower ranges because zero

Step 18.

is

probably on the Attenuator Assembly.

eliminates low circuit paths on Attenuator

zero still cannot be adjusted, Attenuator

go

to zero when polarity

is

trouble in the

If

zero cannot be adjusted,

(or near) zero when A2R52

is

Procedures in

go

to

approximately zero when

es

because zero could not be

A2CR23

on

lower ranges because zero

go

to

approximately zero when

If

zero can be adjusted in this

input

all

LOW

right.

is

probably leakage from a

is

probably bad .

Procedures, Para-

is

good. Display may

lead directly

3484A

probably bad.

not

be

A2CR26

of

to

13.

If

zero cannot be adjusted in Step 10, current injected current compensating circuit

14.

If

zero adjusts with amplifier input nected directly leakage

positions may locate the faulty relay. The charts below the in the various ranges and filter positions.

If

15. connected directly to Amplifier Assembly. supply ground currents may be injected into amplifier low circuit.

is

16.

Preceding checks have isolated the trouble

Replacement circuit parameters which must be done at the factory. See

A2QII,

17.

Adjustment

performed after repair.

18. This check eliminates tested . Range output

Perform Amplifier Zero and Current Adjustment in

19. Paragraph 5-16 after replacing A2CR39.

20 .

If

trouble Amplifier could be causing the zero offset. Amplifier trouble is

21

.

If

trouble readings should indicate defective component. Replacement ment factory. Refer to

Previous checks indicate trouble

22. components which directly affect operation Replacement requires extensive adjustment which must be done at the factory. Refer 5-31.

23. Faulty operation Zero offset.

to

Attenuator

zero will not adjust with amplifier

Paragraph 5-31.

in both directions.

display can be adjusted

display cannot be adjusted

of

is

being

into

the circuit either by A2ICIA or the

A2Qll-13.

LOW

lead con-

to

INPUT

a relay coil shield. Switching ranges and filter

schematic

of

A2ICI requires adjustment

12,

or

13

may be replaced

Procedures, Paragraph 5-13, should be

of

A2R7 should be sufficient

is

in

A2ICI and associated circuits. Filter

output

is<±

in

A2IC1 area.

is

in

stages which follow A21Cl . Voltage

certain components requires extensive adjust-

circuit parameters, which must be done at the

Paragraph 5-31.

of

A2IC1 or certain other components

of

the Filter Amplifier may result

LOW,

trouble

in

Figure 7-3 list relays closed

INPUT terminal, trouble

If

A2CR39

A21Cl from the circuit being

as

indicated in Step 18,

20 mV with its input grounded,

as

indicated in Step 18,

is

in

of

circuit parameters,

is

probably

LOW

is

shorted, power

to

A2ICI.

of

several

if

defective. The

to

saturate

If

A21Cl or other

of

A2IC1.

to

Paragraph

lead

is

Filter

on

in

PRELIMINARY CHECKS

I. Check

2. Perform Adjustment Procedures, Paragraph 5-13.

NOTES

I.

2. After repair

3. A zero offset may be the result

power supply voltages.

If

amplifier cannot be adjusted, proceed with

troubleshooting.

Use

INPUT

LOW

connection unless otherwise stated.

bly, perform 5-13.

I l V power supply.

+ accidental short circuit voltages, may cause the output go

to zero and the instrument supply to normal.

(black) terminal

of

Amplifier or Attenuator Assem-

Adj

ustment Procedures, Paragraph

In

some instruments, an

of

this supply, or transient

fail

to recover. In this case, turning

off

and on again should return the

as

of

failure

of

the supply to

ground

of

the

3.

If

either end

4.

If

either end

display IS

display

+I

5999 on all ranges, disconnect {

of

A2R52. Display should

IS

- 15999 on all ranges, disconnect

of

A2R55. Display should

go

to zero.

Check A2CR22 for possible short.

6.

7. Reconnect A2R52. Proceed to Step 18.

8.

Check A2CR23 for possible short.

{

9. Reconnect A2R5 5. Proceed to Step 18.

0. Connect a I

l

HIGH and Amplifier HIGH lead. Perform Amplifier Zero and Offset Current Adjustments, Paragraph 5-16.

Mn

resistor in series between INPUT

PASSES

Q

I. Set 3484A FUNCTION to

100 mV, SAMPLE RATE fully clockwise, FILTER to OUT. Short HIGH and and connect top A3TP4 (Pol. Amp. In) to A3TP2 (Ground).

Display should

GUARD to

cover and connect jumper

go

to zero.

VDC,

LOW

. Remove 3480A/B

in

3480A/B from

RANGE to

D

FAILS

terminals

Disconnect jumper between A3TP4 and A3TP2.

2. Trouble

is

in

ing and Service Manual.

3480A/B. Refer to 3480A/B Operat-

-

---'------

------

5.

Disconnect amplifier input HIGH (red) lead from Atten uator Assembly. See Figure 5-10. With clip lead, connect HIGH lead to INPUT HIGH terminal. Connect de differential voltmeter (or digital voltmeter able to resolve PUT HIGH and 3480A/B A3TP4. Adjust COARSE ZERO (A2R7) and front panel ZERO for differential voltmeter

200 µV) between

reading<±

200 µV.

IN-

11

. Disconnect amplifier input

from Attenuator Assembly (see Figure With clip lead, connect terminal. Adjust COARSE ZERO (A2R7) and front panel zero for differential voltmeter reading <±

IOOµV.

LOW

lead to INPUT

LOW

(black) lead

5-

LOW

10

).

34 8

4A

-

0-

30392

Model 3484A

Section V

10. Connect a 1 HIGH

fier graph 5-16.

11

. Disconnect amplifier input

from Attenuator Assembly (see Figure With terminal. Adjust COARSE ZERO (A2R7) and front panel zero for differential voltmeter reading <±

Mn

resistor

in

and Amplifier

Zero and Offset Current Adjustments, Para-

clip lead, connect

lOOµV

.

series between INPUT

HIGH

lead. Perform

LOW

lead to INPUT

(black) lead

Ampli-

5-10 ).

LOW

I 2. Remove I

HIGH lead Assembly. Troubleshoot Attenuator Assembly.

13

. Remove I

HIGH lead back to proper pin on Attenuator Assembly. be

14. Replace amplifier sembly. Troubleshoot

Attenuator Assembly.

IS. Replace amplifier HIGH and

connectiorn on Attenuator Assembly. Check A2CR39 should be 2.37 V '±

Mn

resistor and connect amplifier

ba

ck to proper pin on Attenuator

Mn

Check voltages at A2Ql 1-13. Should

approximately

for possible short. Breakdown voltage

HIGH

circuit paths on

resistor and connect amplifier

as

shown on schematic.

LOW

lead on Attenuator

LOW

circuit paths on

LOW

5%

.

leads to proper

As-

16.

If

voltages

are

correct,

~A2ICI

is Amplifier Assembly factory. Refer to

17

. Replace defective comptment and perform Ad-

justment Procedure, Paragraph 5-13.

18

. Remove the black

Assembly. BAL

I to circuit board). Rotate from one extreme to t e other. Display should change

from+

to

as

near zero

A2

must be returned to the

Paragra h 5-31.

the~al

Using

a clip lead connect test point

BAL

2 (mar

OARSE ZERO (A2R7)

15999 to 15999. (Adjust display

as

possibl with A2R7 .)

defective and .

cover on Amplifier

ed

I and 2 on printed

20.

If

display can be adjusted from + 15999 to

- 15999, disconnect jumper from

2. Connect clip lead from common connection A2Kl, 2, and 3 to INPUT

of

voltage

60. Should

If

21.

- I 5999, disconnect jumper from BAL I to

2. Voltages should be approximately schematic. shaded areas on component location drawing

A2

ponents are within shaded areas, refer to Paragraph 5-31.

Filter Amplifier at junction

be

<±

20 mV.

display cannot

Measure voltages at A2Q2, 3, 8, 10, 15-18.

in Figure 7-3, replace.

be

adjusted from + I 5999 to

If

defective components are outside

LOW.

Measure output

If

defective com-

BAL

as

I to

BAL

of

A2RS9,

BAL

shown on

of

of of

22. Check

23. Troubleshoot Filter Amplifier. Typi

de should be approximately Also nents are outside of shaded areas on component location drawing of defective components are within shaded areas, refer to Paragraph 5-31.

voltages are shown on schematic.

voltages at A2Q4, S, 11-14

check diodes A2CR!-S .

as

shown on schematic.

If

A2

in

f igure 7-3, replace.

defective compo-

cal

. Voltages

If

operating

19. Replace

A2CR39.

Figure 5-12.

SYMPTOMS:

Zero offset with INPUT terminals shorted.

or

of

Display shorted.

DC

Zero Offset Troubleshooting Tree.

± I 5999 with INPUT terminals

5-17

Model

3484A

Section V

PRELIMINARY

Check power supply voltages.

NOTES

I.

Use

connection

2. After repair Adjustment Procedures,

INPUT

CHECK

LOW

unless

otherwise

of

Amplifier Assembly, perform

(black} terminal

stated

.

Paragraph 5-13.

as

ground

PASSES

Q

I.

Set 3484A FUNCTION to

JO

V,

SAMPLE OUT. Remove Amplifier Assembly from 3480A/B. Connect 3484A E;n(J2 pin 7) to Sense

Em

and INPUT

standard to 3484A INPUT. Set standard output

to 15.990 polarity, set DC

voltmeter reading should

standard output.

RATE fully clockwise, FILTER

(J2 pin 9). Connect de voltmeter between

V.

(If limiting occurs on only one

de

standard output to this polarity.)

LOW

terminal. Connect

FAILS

VDC,

be

the

RANGE A3

same

(or

2.

If

de voltmeter reading voltage, trouble Operating and Service Manual.

to

AS}

de

as

de

3. Replace 3480A/B Amplifier Assembly and connect short from voltmeter. Disconnect one end or

I 5. Display should

v.

15.990

is

the

same

as

is

in 3480A/B. Refer to 3480A/B

Em

to Sense. Disconnect

of

be

INPUT

either A2CRl4

approximately

dis·

4.

If

display

is positive input voltage, shorted.

5.

If negative input voltage, shorted.

de

6.

If

voltage and A2Ql9.

correct, and limiting occurred with

displ

ay

is

correct, and limiting occurred with

limiting

is

still present with positive input

reconnect A2CRl4

A2CRl4

is

A2CRI 5

is

or

15. Check A2CR20

probably

34

84 A-C-

3039

7.

If

limiting

is

4

Figure 5-13. Limited

voltage, reconnect A2CR26

DC

Display Troubleshooting Tree.

still present with negative input

A2CR14

and A2Q20.

or

15. Check

5-

19

PASSES

0

2.

If

instrument downranges

Oock

Control, Autorange, and Downrange able signals are correct and Uprange Gate operating. Range Register operates properly in the downrange mode. Disconnect short from test points. With input shorted, instrument should downrange

to

100

as

indicated in Step

mV.

En-

FR

Model 3484A

16.

If

instrument

trouble may be due

operation

13.

If

instrument upranges correctly

increase input to

1000 V range.

11. Disconnect input short and apply

I,

is

terminals.

Should uprange

to

I 0 V range.

1.5 V to

INPUT

If

display ranges between 100 mV and 1000 mV,

14. ClO may be defective or CR? may be open.

If

display stays on 100

15. Limit Gate and limit signals. Also check Uprange

signal input from 3480A/B.

150 V. Should uprange to

to

IO

mV

range, check Uprange

V range,

17.

If

display ranges between 10 V, 100 V, 100 mV ,

and 1000 mV,

has

passed all tests to this point,

to

of

a circuit

intermittent or marginal

or

component.

Cl9

may be shorted.

Section V

I.

Set FUNCTION SAMPLE Short INPUT terminals. Short two together (upper left comer switch Uprange Gate to produce an Autorange mand after each sample period. shorted, Downrange Enable each sample, causing Range Register range. Instrument should range continuously between 100 ranges.

to

RATE fully clockwise, FILTER

to

It

should not

VDC, RANGE to

FR

of

V,

1000

go

to

the 1000 V range.

A3). Tum RANGE

With

will be

mV,

and 100 mV

AUTO. These conditions cause the

V,

IO

WW

D

FAILS

3484A-C-30393

IOOO

to

test points

Com-

input

after

to

down-

If

instrument does not downrange, trouble

12. probably

in

V, B.

3.

If

display stays on one range , Uprange Gate (IC?), the preceding Inverter (IC6) may be defective.

If

display downranges continuously between

4. IOOO

V, 100 V,

ranges, CR8 may be shorted.

If

display ranges between 1000 V, 100

5. 10 V ranges,

C24, CR8 may be open; RI

R3

(IC18) or

If

display ranges between 100 V and 10

6.

C!5, CR6, CR9 may be shorted;

may be open; or defective.

7.

If

display ranges between 100 V and 100 mV,

C!6

or C20 may be shorted.

8.

If

display ranges between 1000 mV and 100 mV,

C9

may be shorted;

RI,

R2

Flip-Flops (IC14) may be defective.

9.

If

display upranges between 100 mV, 1000 mV,

and 100 V, CR? may be shorted.

10 V,

10.

If

mV

light stays on while decimal changes

follows: right; center; center and right; center and

left; C24 may be shorted or

may be defective.

· (IC2), or RI Flip-Flop

IO

V,

1000 mV, and 100 mV

Cl4,

C18,

C25

may be shorted; C!8,

Flip-Flop (IC14) may be defective.

· R2 Lockout Gate

R2

Flip-Flop (ICI4) may be

Cl4, CR6

R3

V,

V, C9,

C9

, C!6, CR6

may be open; or

Flip-Flop (IC14)

and

as

Gate, or

Downrange Gate , Downrange Limit

the associated inverters.

is

PRELIMINARY

If

check for waveform at CLK C test point at center

of

Sample indicator lamp and drive circuits. waveform Generator and

cuits.

NOTES I.

All

procedure

Assembly A3.

2. Numerical display may not change during ranging checks. Range

position

CHECKS

SAMPLE

indicator does not flash normally ,

A3.

If

waveform is correct, troubleshoot

is

not present, check 3480A/B Sample

Qock

Control Multivibrator cir-

components and test points referred

are

located on

and

function annunciator

IOOmv xx.xx

IOOOmV

!OV

!OOV

IOOOV

Range

and

is

determined by decimal

as

mV

xxx.xmV

x.xxxV

xx.xxv

xxx.x v

to

Function

follows:

in this

auto-

If

SYMPTOMS

Display

is

correct up to a certain point, but

not

go

higher than this point. This condition

referred

to

in

this

procedure

as

limiting.

will

is

Figure 5-14. Autorange Troubleshooting Tree.

5-21

PERFORMANCE

CHECK

TEST

CARD

Hewlett-P Mult Serial No.

~

ifunct

PARA

acka

rd Model 3484A

ion

Unit

GRAPH

54

DESCRIPTION

Accuracy and

I

nput

±

100.000 mV 100

±

90.000

±

80.000

±

70.000

±

60.0

00

±

50.000

±

40.0

00

±

30.000

±

20.000

±

10.000

±

100.00

±

300.00

±

500.00

±

700.00

±

900.00 mV

± 1000.00 v 1000

10.0000 v

±

9.0000 v

±

7.0000 v 10 v

±

5.0000 v

±

3.0000 v

±

1.0000 v ± 10.000 v 1 ± 100.000 v

±

1000.00 v

- 1000.00 v 1000 v

or

(7408)

- 500.00 v

±

100.00 v

mV mY mV mY mV mV mY mY mV mV mV mY mV

Lineari

ty

Check

R

ange

mY

100

mV

100

mV

100

mY

100

mV

100 mY ± 49.97 1

00

mV

100

mV

1

00

mV

100

mV

1000

mV

1000

mY

1000

mY

10

00

mY

1000

mV mV

10 v

10

v ± 8.998 v

JO

V

10 v

JO

V

00

v

JO

O V

1000 v 1000 v

1000 v

READING

P

os.

Tests perform

Neg.

ed

by

Dat

e

TEST

LIM

ITS

Min. Max. ± 99.97 ± 89.97 ± 79.97

± 69.97 ± 59.97

± 39.98 mV ± 29.98

± 19.98 ± 09.98 ± 099.9

± 299.9

± 499.8 ± 699.8 ± 899.8

± 999.8

± 9.998 v ± 6.998 v

± 4.998

± 2.999 v

mV

to l 00.03

mY

to 90.03

mY

to 80

mV

to 70.03

mV

to 60.03

mV mY

mV mY mV mY mV mY mV mV

50.03

to to

40.02 to 30. to

20.02

to

10.02 mY

to

I 00.J

to 300 to

500.2

700.2

to to

9002

to

1000.2 mY

to

10.002

to 9.0

to

7.002 v

v to 5.0

to 3.001

.03

02

.J

mY mY mV

mV

mV mV mY mV mV

mY mY mV mY mY

mV

v v

v

± 0.999 v to l.001 v

± 09.99 v ± 99.98 v to 100.

± 999.8 v to 1000.2 V

- 999 .8 v to 1000.2 V

- 499.8 v

± 099.1 v to

to

10.01 v

to 500.

JOO

02

2 v

.I V

V

5.5

5-8

5-9

5-

10

VDC

Input Resistan

J

OO

mY,

1000 mY, 10 V

J

OO

V, 1000 V

DC

Common Mode Rejecti

Check

AC Common Mode R

Check

AC Normal Mode Rejection

Check

ce

ranges

Check

ejection

ranges

on

volts volts

lt

vo

lt

vo

volts

change change

s chan

s ch

ange

change

ge

0.009 V max

0.90

to

0.92 V ch

0.

049

V max

V max ch

0.0

01

0.001 V max

change

ange

change

ange

change

PERFORMANCE

CHECK

TEST

CARD

(Cont'd)

PARAGRAPH

5-

11

DESCRIPTION

Ohmmeter Accuracy Check

Range

100 n

1000 n

10

kn

100

kn

1000

kn

10

Mn

Input

100 n

1

kn

10

kn

100

kn

1

Mn

10

Mn

READING

TEST LIMITS

(100.00 n + offset) ± 7 counts

(1000.0 n + offset) ± 2 counts

10.000

100.00

1000.0

10.000

kn

± 2 counts

kn

± 2 counts

kn

± 2 counts

Mn ± 11

counts

Model 348

4A

Section VI

SECTION

REPLACEABLE

6·1.

INTRODUCTION

6·2. This section contains information for ordering re·

placeme th

·hp· part number of each part, together with notes, and provides the followin

6-3. Miscellaneous parts are listed

Aa

Al •....••...

A

All

C

c

er

coer

com

comp . ...•

co

dep OPDT DPST

elecc enc1p

F .

FET

fxd

CAA>

CH1

ad

Ce

grd

H lu Hz

A

e

BT C CR . DL OS

E

F

nt

parts. Table 6-1 lists parts

eir reference designators and indicat

a. Total quantity used in the ins

co

lumn

).

fust

time the pa

b. Description of the part. (See list

below.)

ypica

c. T

....

.•• .

........ .

.......

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

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

.....••...•..•.••....•.....

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

.............•...........

.......•..

n.n . .

..•.......•........

..

. . . •

..

. . .

. .

.........

.....•..•.....

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

.........

........

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

..........

•••..••.•••

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

....... .

....

, . .

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

........

......

....

...

..... , ...

...

, , . .

•.....

..........

....

...........

....

, . .

,,

.....

. . . , .

........

.......•

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

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

..........

l manufacturer

co

de. (See Appendix A for list

......•

...

....•...

..........

.....

•....

.. ..

.....

......

..

. . . deposhed

.... double.pole double·lhrow

. doubl

..

. ......... eiec1roly1i

, , • ,

. .

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

• . .

.....

field

........

....

giphertt -10'9

.....

....

........

•..........

herlz (

cyc

. . ....

....

. ' .

....

... , ...•....

....

...•.

. .

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

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

....

...

.

misc

....

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

.

The total quanti

rt

num

.....

...

~

liver

. .

..

aluminum

. . . 1mpere(1)

gold

capocic

or

..c

eram

ic

coefflclenl

. common

, composition

, .

con

necti

on

pole single·lhrow

enc1ptul11ed

.f1r1d(s)

fixed

arsenide

httti

guard(ed)

germanium ground(ed)

. henry(les)

mer

cury

per

second)

, . , .auembly

mot

....

b111ery

l1or

delay line

...

..

lamp

part

fuse

c

or

..

, .

effec11ransi11or

.

pllium

...

....

le(s)

. .

..

.... ' .. .

...

...... c1p1c

........ diode

....

electronk

in

alphameric or

es the descriptio n,

any applicable

g:

ty

of a part is given the

ber appears.

of

the part

of manu

at the end of Tab

ID

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

impg ......

ined

. . . . . . . ... •

iJU

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

kn

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

kH

~

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

L

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

I.in .........

l

og

, ...........

mA .....

M

Hz

. . . . . .

Mn .......

met

nm

mrr

' ' . . . . . . . . .

ms

. . .

....

mtg ... mV

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

µP

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

14

.......

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

µV

my

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

nA

.........

NC

....... .

Ne

....

NO , .. , ...

NPO ....

Prefix

tera

gip mep kilo hecc

o h deb deci

FL

....

HR

........... , ... ,., , ,

IC

.. ..

J

....

......

K

........

L

......

M

.........

MP

..........

p

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

...

...........

• . .

............. linear

........

. . .

mllli

ampere(

....

. megahertz • I

. •

.. ..

....

.. ' ' ....... melll

. . • .

.......

.....

• .

........

. millivoil(s) •

........

. .

mlcrovoh(s) • 10 · 6 voltJ

nanoampere(s)• I0-

...

. .........

...

.....

...

......... .

.....

...

....

(iero temperature

Symbol•

T

c;

Mor Meg 1

K

ork

di

d

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

..........

....

.....

, ,

........

......

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

. . . • .

................ 1neter

. •

.........

der

of

trum

ent (TQ

abbrevia tions

in a five-

digit

facturers.)

le 6·1.

. . . .

.........

kilolun(s) •

kilohen~

s)•

megohm(

....

......

............... neon

.....

nepllve

..........

......

. . .

.. , ........

ABllRllVI

..

Inside

dl1me1er

..

Impregnated

Jncandesce.nt

insulallon(ed)

1o•J

ohms

•

1o•J

her11

lnduccor

taper

loprtlhmlc

11pcr

10 - J ampe

0~

he

•)

•

IO

~

ohms

...

.......

rum

. manuf

ac

turer

...

mJlllsecond

mounling

10 3 volts

mlcroruad(s)

micr

..

econd(s)

Mytu@

91mpera

normally closed

normally open

pOll

llve zero

coerncle

DllCIMAL MULT

Muil

ipUer 1012 109

o6

1<>3 102 10 femlo r 10· •

DESIGNATORS

. .

..

,,., ln1egr11ed cir

...........

Otter

...

, .heater

cuit R

.........

jack

..

relay

lnduclor T

mechanical pen

plug

VI

PARTS

6-4. ORDERING

6·5 . To obtai

to

your

local Hewlett-Packard Field Office. (See Append B for list Hewl

and serial numbers.

6·6.

6-7. To obtain a part that is not listed, include:

ATIONS

ns ..........

nu

. . . .

n

......

obd

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

OD

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

p

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

pA

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

pc

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

pf

........... , .....

res

piv ....

p/o . . . . . • . . .

rcz

p

os.

..

poly

....•..

pot ....

p·p

...

' . •...............

ppm

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

prec

.... , ........

R

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

Rh

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

'"-

. . . . •. . .

rot

.. ..

Se

...

1ec1 .......................

Si

nt)

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

..........

sl

IPLlllRS

Pr

efi

c

enti

milli m

micro

nano pico

atto

Q

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

QC

R . . . .

...

RT ....

S

........... , ................

...

TB ...

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

TC

.....

TP

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

of

ett

-Packard part numbers. Include instrument model

NON-LISTED

a. Instrument model number. b. Instrument se

c. Description

Fu

ncti

d.

nan

a.econd(

....

not

.....

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

. , .......

...

• . . .

.....

. , ......... pulystyrene

. , .......

coefficlenc, long

•..........

. .

...

• .

.................. rotary

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

....

.......

x

Symbols

"

p

..

. . • . . . . . . . . . . 111

. • . . . •.......

. . , .

.. , ..

....

...........

.......

.. . . .

INFORMATION

n replaceme nt parts, address order or inqui

office locations.) Identi

PART

S.

ri

al number.

of

the part.

on

and location of the part.

s)• I0-9 seco

separa

tel

order

.oucslde

, picof1r1d(s) 10 · 12

..

pe1k Inverse

. . .

puu

, . precilion

bilicy

, and/or tolerance)

..

.......

root·mt.1n-square:

........

......

n

...

......

...

.......

..

, , ,

. . , , , ,

...

. ter

......

y

replaceable

' .. ohm(s)

by

d

cicrlpUon

dl1meter

peak

picoampere(s)

ptlnced circuh

farads

volt1ge

...

pan or

posiclon(s)

...

potlorneter

pe1k·lo-pe1k

per million

(1empe

r11ur

cerm

Ill

res.istor

rhodium

sel

enium

..

secclon(

silicon

.. ..

slide

Mullipll

er 10 · 2 10 · J

10· 6 10- 9 10·

12 10 15 10-

18

111nsls1or

nsl11

or-dlode

r

esistor

...

t

hermistor

. . 1

wi1

.. 1r1n1fo

rn1er

minal

board

lhermocouple

cat

pol

nds

SPOT ......•..... single-pole doubl

SPST

Ta ..........................

TC

••••••••••.

nei

101

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

101

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

trim

TSTR

V .

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

view . .... ,

vu

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

vdcw ....

W .

....

w/ .......•........ , .............

e

wiv

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

·

w/o

ww

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

•

.............. optimum

..

s)

TS

........

V ,

...... , ••

w

......

ch

X .

...

XDS

XF ....

Y

nc

Z

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

.

fy

parts

.. .....

....

..

1ingl•·pol.,lngl

.. , .

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

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

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

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

....

.........

....

. .

...

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

1emper11urH<>4'fficlen1

......

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

...

, . ,

....

direct currenl

worklna invene

factory.

shown (pen may be omi11ed)

...

....

. no standud type

usJg11ed

@

Dupont

....

...

......

..... vac

uum

...

. . , , , , , , , •. , , ........

, •. . . , , . , , •

....

...

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

by

.

tantalum

ticani

um

,

...

tolerance

.... crimm

1r1nsl11

....

,

alternating

wo

rklng

work.Ing vol11ge

wi.rc"NOund

value

sel

avenp

(aelecced

spec

de Nemours

. . 1er

mln1l

tub

e,

neon

phococell, eic.

.....

.... cable

, , ,

..

iamphoider

..

fuseholder

.

..

ry

their

e·throw ..

1hr

dioxide

cogle

voh(

current

voltage

variabl

w111(s)

wilh

volt•&<

wilhout

ected

value

number

ial

type

11rip

bulb

.socke

crystal

nec-k

ix

ow

er

or

s)

e

at

,

t

6

·1

Section VI

REFEREN

DESIGNATOR

CE

-hp

PART

-

NO.

TQ

Table

6-1.

Rep

laceable Parts (

DESCR

IPTIO

Cont'd)

N

MFR.

MF

R. PART

Model

3484

NO.

A

A1

C1 C2 C3 C4 C5

C6

, C7

CRl

thru

CR1 1

CR12 CR13

Kl K2,

K4A/B, K5A/B

K6 K7

KS

R1

R2A/B/C R3, RS R6 R7

RB R9

CR10 1901-

thru

CR17

K3

R4

03482-66501

0160-3419 1 C: 0160-3556 0160

-3SS5 1 C:

0160-

3472

0160-

3473

50-0093

01

0040

1902-0S42 1 1901 -

0040

0490-0877 2 Relay: Reed 0490-0802 9100-3216 0490-0801 9100-3217

0490

-0801 9100-3216 0490-0877 0490-0802 9100-3216

0698-7619

03482-01205 03482-01206

0380-0474 0520-0 1

33

0610-0001 21

90-0045 30S0-0098 30S0-

0494

3050-0495 0811-

114

1 1

2100-1986 0698-7510 0683-12S5 1 R:

0683-6245 0683-1025

ATTENUATOR

1

fxd

0.10

C:

1

fxd

0.082

fxd 1 C: 1 C:

2

42

3 4 Coil: Electromagnetic for 6 2 Coil : Electromagnetic

1 1 Shield: Res 1 Heat 1 Spacer: bushing, 1 Screw:

1 1 Lockwasher: Helical No. 2 1 Washer: Fl 1 Washer: Flat, 1 Washer: Shoulder,

1 R: var cermet flm 1 ki l 1

1 5

0.018

fxd

teflon 0.012

fxd

teflon

C:

fxd

0.0

Diode: Si Diode

Assy: Breakdown

Not

assigned

Diode: Si

Switch

: Reed (does

Switch:

Switch

: Reed, magnetic (does

Coil : Electromagnetic

Relay: Reed -hp-

Switc

h: Reed (does

Coil:

R:

fxd

flm Sink

Nut:

Matched set: 2 Not

assigned

R:

fxd

carbon

fxd

comp 1.2

R:

fxd

comp

R:

fxd

comp 1 kilohm

ASSEMBLY

microfarad 10%

microfarad microfarad

0.039

1 microfarad + 80% - 20% 1

30

wiv

30

wiv

30

Reed, magnetic (does

Electromagnetic

100kilohms1% 5W

istor

RH 2-56

Hex 2-

teflon

x

S6

at

No.

2

teflon

·

4.95

comp

megohms 5% 1

620 kilohms 5%

100

5%

50

5%

50 microfarad microfarad

mA 2 pF 2 ns

20

V -hp-

mA 2 pF 2 ns

not

include coil) -hp-

K2

not

for

K4

not

for

K6 not

inc

lude coil) -hp-

for

K8

1/2

teflon

megohms, 1 -

ohm 10% 1

620 kilohms

1/2

5% 1

/4

vdcw vdcw vdcw S% 100 5%

100

and

K3

include

and

KS

include coil)

99.8

/2

W

S%

/2

W

vdcw vdcw

00

2 W

vdcw

coil)

kilohms

-hp

-

96733 844 84411 HEW-212 96733 96733 C-65149 91418

07263

-hp-

·

-hp-

19647

-hp-

98291

-hp-

73138 6201121 01121 CB1255

01121 01121

hp

11

·

C-65146-2

EW-213

H C-65149-1 TA

FDG-1088

FDG 1

088

MP312

227262

obd

206

-1

H

B6245

CB6245 CB1025

-3 obd

obd

A2

C1 C2 C3

6-2

0340-0060 0360-1442

0490-08 03482-0550 03484

11

-01

202 2190-0918 2 2360-0207

03482-66502

03482-69502

01

40-0178

0140-0202 1 c 0160-0178

1

36

7 Terminal:

20

2

1 Shield :

2 Screw:

1

1 Rebui 1 c

2 c

Terminal: Solder Terminal:

Shield: Reed

Attenuator

Lock

washer:

DC

AMPLIFIER ASSEMBLY

lt

DC

See

Paragraph 5-31

fxd

mica

fxd

mica

fxd

mica

stud,

Teflon

insulated

Reed relay

coil for

Kl

Helical No. 6

Pan

head 6-

32 x 7/8

Amplifier Asse

560

pF 2%

15

pF

5%

27

pF

5%

teflon

and

mbly

K7

98291 FT-E98291 ST27264

-hp-

-h

-

72136 72136 72136

hp

p-

-

SDX1988

RDM15FS6 RDM15C150J5C RDM15E270J3S

15

2000SL

-G

1G3C

obd

-

obd obd obd

Model

3484A

REFERENCE

DES

IGNATOR PART NO.

A2 (Cont'd)

-hp-

Table 6-1. Replaceable Parts (Cont'd)

DESC

TQ

RIPTION

MFR

ec

tion

S

.

MFR

. PART NO.

VI

C4 0160-0938 1 C:

cs

C6 C7 CB C9 C10

C1

1

C12

C13 01

CR

1 thru CR5 CR6, CR8 CR9

CR10 CR11 CR CR14, CR1S CR16

CR20 CR2 CR22, CR24, CR26

CR27 thr CR30 CR31 thru CR39, CR41,

CR4

CR7 1901-

12, CR13

thru CR19 1901-

1 1901-

CR23

CR25

u CR29 1901-

CR38 CR40 CR42

0180-0300 0140-0198 1 C: 0140-

0197 0180-1702 0160-2018

0160-0178

60-2208

1901-

0025

1902-0048

0025

1902-0048 Diode: 1901-002S Diode: Si

1902-0071 1 Diode: . 9.0 v 5% 1902-3190 1902

-0777

1902-0766

0025 1902-0766 Diode:

0025 1901-0546 1901-0025 1

902-0766

0025

1901-

002S 1902-3002 1901-0025

1 C:

Not

1 C:

Not

1 C: 1 C:

C:

1 C:

27

Diode:

2 Diode: 5% • 6.

Diode: Si

1 Diode:

Diode:

2 4 Diode: -18.2 v 5%

Diode: Si

Diode: Si Diode:

2

Diode: Si Diode : -18.2 V 5%

Di Not Diode : Si Di

2

Diode: Si

fxd

mica 0.001

fxd

20

fxd

mica

ass

igned

fxd

mica 1

assigned

fxd 180 fxd

mica 2

fxd

mica

fxd

mica 3

Si

ode: Si

ass

igned

od

e: 2.

mic

rofar

ad

S%

microfarad - 10% + 7 5% 1 S vdcw

200

pF 5%

80

pF 5% 300 V

microfarads 20% 6 vdcw

50

pF

5% 100 V

27

pF

S%

30

pF 5%

81

V

5%

· 6.

81

V

13

.0 v 5%

6.2

V 5%

IN

825

-18.2

v 5%

37

V 5%

100 V 72136 RDM15E 102J1C

56289 72136 RDM1SF201J3C 72136 RDM15F181J3C 56289 008S3

72 00

03 04713 03877 SG-817 04713 03877

04713 SZ1 1 04713 04713 04713 03877 SG-817

04713 03877 SG-817 17856 03877 SG-817 04713

0

3877

03877 SG-8 04713 SZ10939-Z

38

0

30D206G01 SBB2-DSM

1

50D187X000682

RDM15F251 J5S 136 RDM1 SE270J3S o 853

RDM1 SF331J3C

877

SG-817 SZ

10939-134

SZ10939 SG·817

SZ10939-215

IN8

SZ10939-257

SZ10939

FN1705

sz

SG-81 7

77 SG -817

-134

085

25

-257

10939-257

17

obd

obd obd

-DYS o obd

obd obd o obd

obd

obd obd

bd bd

bd

-.

IC1

K1

thru

K3

01 Q2A/B 03

thru 06 07

Q8A 09 010 thru Q14A/B 0 15

016, 017 018 019 020 021

022, 024 025, 027 028

as

/B 1

013

023 026

820-0404

1

0490-0778 9100-1463

1854-0221 18

S4-0408

18

S3-0238 8

18S4-

040

8

853-0262

1864-

0408

18

54-0221

18

53-0238

1854-0408 TSTR

18

53-0238

1854-

0408

1863-

0238

1864-0408 1853-0238 TS

1854·

0408

185

3-0238 TS

18

65-0036

1854-0408

1 IC: SiNChannel

Sw

itch:

3

Coil :

3

Not assigned

2 TSTR: Si

13

TSTR TSTR: TSTR

1

TSTR Not TSTR: Si

TR

TS TSTR: Si

TSTR TSTR TSTR TSTR

TR

TSTR

TR TSTR TSTR

Reed, magnetic

Electromagnetic

dual

: Si

NPN**

Si

PNP••

: Si

NPN*

: Dual

assigned

PNP•

NPN*

: Si dual

PNP**

SiNPN Si

PNP** Si NPN* * Si PNP* * SiNPN*

Si

PNP**

Si

NPN**

Si

PNP**

Si N Channel* Si NPN

NPN**

•

NPN**

* *

..

for

K 1

thru

K3

-hp-

-hp·

·hp·

-hp-

·hp-

-hp-

-

hp hp

·

-hp-

·hp·

-hp-

-hp·

-hp-

·hp·

-hp-

·

hp

-hp·

·

-

·

6-3

Section VI

RENCE

REFE

DESIGNATOR

A2

(Cont'

d)

-hp-

PART NO.

Table 6-1. Replacea

TQ

bl

e Parts (Cont'd)

DESCRIPTION

Model 3484A

MFR. MFR. PART NO.

-

Al

R2 R3 R4 RS

R6 R7 R8 R9 R10

R11 R12 R13,R1 R15 R16

R17 R18 R19 R20, R22, R23

R24 R25 R26 R27", R29

R30 R3 R32 0757· R33 R34

R35 R36 R37 R38 R

R40 0811 R4 R4 R43,R44 R45

R46 0683-1825 2 R:

R51 0684-1241

4

R21

R28

*

1*

39

1

2

R47,

R48 R49 RSO

R52 R53 R54 0684-1241 R:

55

R R56

R57 R58

R60

R59, R61 R62

R63 R64, R65 R66 R67,R68 R69

0683·1025 0698-7379 0757-0280 3 R: 0698-4480 1 0698-3518 1 R:

0698-4205

2100-0755 0698-4498 1 0698-3572 2 0757-0476 2 R:

0757-0280 R: 0757-04 0757-0283 0698-3572 R: fxd flm 0757-04

0698-4516 0757-0280 0698-3265 0757--0288 2 R: 0811-

0698-4470 0757-0402 0698-4205 0757--0428 1 R:

0698-4393 0683-1025 R:

0698-3119 08

0698 0757-0281 2 R:

0683-1045 4 R: f

0683 0683 0683-1825

0684-1231 1 R:

57

76

1139

2100-22

16

0422

2100-07

55

11-2861 1

2100-

2216

2100-17

88

2860

-7479

·1015 4 R:

-1045

0683-6235

0684-2231

0683-1025

0683-1

045

2100-22

16 R: var 5

0683

-1015 R:

0683-10

25

0683-104

0757-0459 2 R:

0757-0457

0683-3045

5 R:

R:

1 R:

R:

3

R:

2

R: R:

2 R:

R:

2

R:

1 R:

R:

1 R: 1

Mat

1 R:

R: var 5

3 1 R:

Facto R:

Factory selected val

1 R:

R: var 1

1 R:

R: R:

1 R: var

R:

1 1

R: Not

R:

2

R:

1

22

R:

R: Not

R: f

2 R:

N

fxd

comp 1

kilohm fxd fxd flm 1 fxd

fxd fxd flm

var 1

fxd fxd flm

fxd fxd

fxd

fxd fxd

fxd flm fxd fxd fxd ched set: 2 -45.5 kilohms

fxd fxd

ry selected value

fxd fxd

fxd comp 1 kilohm fxd 988 var 5

98.8 fxd

ass

fxd flm 2.74

xd

fxd

fxd comp fxd comp

fxd comp fxd comp 120 kilohms 10% 1/4 W 01

fxd fxd comp fxd fxd

fxd fxd comp 100 kilohms 5% 1/4 W 01121

fxd fxd fxd

ass

fxd flm 56.2 kil

xd

fxd

ot

assigne

1

2 x

10

kilohm

flm

15.8

flm 7.32

21

kilohms

kilohm

flm 53.6 kil

60.4 kil

flm

301

flm 1 kil flm 47

.5 kilohms 1 % 1

flm 2 kilohm

60.4 kil

flm

301kilohms1 113

flm

1kil flm 118 flm 9.09

flm

6.98 kil

kilohms 10% 1

flm

110 flm

21 kil flm

1.62 kilohms 1 % 1 /8 W

flm

909

kilohm

flm 73.2 oh ms 1% 1

met

flm 6.98

kilohms 0.05

kilohms 10%

500

ohms 10%

kilohms 0.05% prec

prec

flm

igned

comp 1

00

comp

1.8 kilohms 100 100

1.8

comp 12

62

comp 1

20

comp

22

comp 1

kilohms comp 100 comp 1 comp 1

00

igned

flm 47.5 kil

comp

300

d

5% 1/4 W 01121

ohms 10%

0

1 % 1 /8 W kilohms kilohms

5%

kilohm ohm

kilohm

ohm

kilohms

ohm

5%

1% 1/8

W 01295

1%

1/8

W

1%

1/8

W 14674 C4

ww

ohms

1% 1/8 W

ohms

1 % 1

/8

1/8

W

/8

1% 1/8 W

% 1/8 W

/8 1/8W 1% 1

/8

1% 1/8 W

1% 1

/8

W

/8W 1/8

W

W W

W

s 1 % 1 /8 W

1%

s 1% 1/8 W 14674 C4

ohms

s 1% 1

1%

ohms

/2

s 1% 1

ohms

1%

ue

s 1% 1/8 W

ww

/8

W

5% 1/4 W

kilohms 1% 1/2 W 91637

% prec

ww

1/2

W

63060

75042 91637 91637

91637 91637

91637

91637 73138 62-

91

750

01121

73138 62-208-1 73138 62-205-1

ww

10

kil

ohms 0. 1 %

kilohm

s 1% 1/8 W

k ilohms 5% 1/4 W

5% ohms 5% 1/4 W kilohms

kilohms

kilohms 10% 1/4 W kilohms

kilohms

kilohms 1

kilohm

10% 1

ohms

kilohm

kilohms

ohm

kilohms

1/4 W

5% 1/4 W 01121

5% 1/4 W

10% 1 0%

1/4 W

5%

1/4

W

/2

W

5%

1/4

W 01121

5% 1/4 W

s 1% 1/8 W

5% 1

/4

W

91 01121

01121 01121 CB

01121 CB1

01121 CB1231 01121 01121 01121 CB223 1 01121

731 01121 C

01121 CB1045

14 91637 01

CB1025 RX

14

674

14674 C4 obd

14674 C4 14674 C4

14674

14674 C4

-hp-

14674 C4 14674 C4

637

14674 C4

42

14

674 C4

-hp-

-hp·

18612 S1

637

121

38 62-

67

4 C4

121

-1 C4 MC550

CT-

100-4 CMF-1/10CMF-1/10-

MFCMF-1/10-32

C4 CMF

CMF-1/10CMF-1/ 10-

CMF-1/10-32

CMF

ST-100

CB1025 MFF-1/2-10

02

MF-1/10-

CB CB1825 CB1045 CB1241

CB62 CB

CB1025 CB1045 CB101 5

B10

MF CB3045

1/10-32

-1/10-

208

-1

-1/10-

-4

1045

1015

825

35

1241

208

-1

25

-1/10-

32

32 32

32

ob obd

obd

obd obd ob ob

obd

obd obd obd

obd obd ob

obd

ob obd ob obd obd obd

obd

o

bd

obd obd

d

d d

d

64

Model 3484A

REFERENCE

DESIGNATOR

A2

(Cont

'd)

-hp-

PART NO.

Table 6-1. Repla

TQ

ceab

le Parts

DESCRIPTION

(Cont'd)

MFR.

Section

MFR. PART NO.

VI

R70 R71

*,

R73 R74

thru

R75 RSO"

A3

C1 C2 C3 C4 C5,C6

C7

ca

C9,C10 C11 C12

C13

14

C C15 C16 C17

C

18

C

19 C20 C21 C22

C23 C24,

C25 C26 C27

C28

R72*

R79

0698-4205 0698-4395

0684

-2231

0340-0060 0490-08

11

5020-6822

03484-66503

0160-0194 2 C: 0170-0024 1 C: 0160-0194 C: 0180

-0197

0180-0309 2 0160-0157 1 C:

0160-0170 1 C: 0160-0362 4 C: 0160

-31

88

01

60-3405

0160

·261 1 0140-0194 4 C: fxd mica 110 pF 0

140-014

0165

-0121

0194

5 0140-0194 0160-0154

0160-0362 C: 0140-0145 0160-0362 01600150

0150-0122 01400160·2605 1 C: 0150-0122 0180-1701 1 C:

R:

fxd

flm

21

Fact

1 R:

1 Enclosure: Isothermal

1

1 C:

1 C: 1 C: f 2 1 C:

1 1 C:

2

ory

fxd flm 78.7 ohms 1% 1/8 W

R: f

xd

Not

assig

Factory selected value

Terminal : Sol Termin

RANGE

fxd myl fxd mylar 0. fxd fxd fxd

C:

fxd fxd cer fxd fxd fxd

xd myl

C:

fxd

C:

fxd fxd mylar 0.0022

fxd

C:

fxd

C:

fxd

C: f

xd mylar 0.

fxd

C:

f

xd

C:

fxd f

xd 0.02

C:

fxd 0.0 fxd

kiloh

sleected value

comp

22

ned

der

al: Reed relay

AND

FUNCTION

ar

0.015 m 022

mylar

0.015 microfarad 10% 200

2.2 microfarad 10%

4.7

mic

rof arad 20% 10 vdcw

mylar

4700

0

.22 mica 510 myl

2.0

mica mica 11

mic mica mica 510 pF

cer 0.1

0.002 mi mica 110 pF

6.8

microfarad + 80% • 20%

ar 0.

27 microfarad 10%

microfarad 10% ar

1.0 microfarad 10%

22

pf

0 pF 5%

a 510 pF 5%

22

pF

056 micr

micr

crofarad 20% 500 vdcw

microfarad · 20% + 80%

02

microfarad 20% 500 vdcw

microfarad 20% 6 vdcw

ms 1% 1

kilohms 10% 1/4 W

stud

/8

W

ASSEMBLY

icr

ofarad 10%

microfarad 20%

20

pF 10%

pF

5%

200

5%

50

5%

microfarad 10% 200 vdcw

5%

ofa

rad 10%

,ofar

ad

• 20% + 80% 5

5%

vdcw

50

200 200

50

vdcw

200

25

vdcw vdcw vdcw

25

vdcw

14674 C4

637

91 01121

98291 FT-E-15 27264

·h

p-

CMF·1/10·32 CB2231

SDX·1988

·G

-hp-

56289 192P1 56289 192P22302-PTS 56289 192P15392-PTS 56289

90201

56289 192P47292·PTS 56289 5C9B-CML

72136 84411 844

11

844

11

72136

14655 72136 56289

72136

14655 72136 56289 56289 5C50B1·

72982 72136 72982 72982 56289

5392

-PTS

1500225X9020A2

TA

S475M010PIA

RDM15F511J3C HEW-101 HEW-

138

HEW-101

RDM15F 111J3C obd RDM15F111J3C

192P22292-PTS

RDM15F511J3C obd RDM15F511J3C obd

192P56392·PTS

CML

801-000-Y5SRDM15F111J3C 5835V5U203Z 801-000-Y5S-

15006

202M

85X0006

obd ob

obd obd

-DYS

obd obd ob

obd obd

obd

H2-DYS

d

CR1

thru

CR6

thru

CR13, CR15 CR24

IC1, IC2

IC3

IC4, IC5

IC6

IC7

thru I

IC10

IC11

IC12

IC13

IC14

IC15

IC16,

IC

18

CR5 CR12

CR14

thru CR23

C9

IC17

1910-0016 7 Diode: 1901-0040 1910-0016 1901-0040 1902-0041 1 Diode:

07

1820-03 1820-0310 1820-0307 IC: 1820-0202 1 IC: Fl 1820-0094

1820

-0307 IC:

820·03

10

1 1

820

·0307 IC:

1

820-0094

1820-

0349

820·03

10

1 18

20-0307

18

20-0094

Diode: Diode: Diode: Si

10 IC: Hex inverter

IC

:

3

8 IC: D

IC

: 3-i

IC:

1 IC:

IC

: 3-i

IC: Hex IC:

Ge60wiv Si

30

wiv

Ge

60wiv

30

wiv

Breakdown,

put

NANO

3-in Hex inverter

ip-fl

op

16

TL

Quad 2-

Hex inver Hex inverter

DTL 2·

DTL

nput

Quad 2-

input

nput

inverter

Quad 2-

ter

NANO

NANO NANO

30

mA 2 pF

30

mA 2 pF 2 ns

Si 5.11 V 5%

gate

pin dual

input

Gate

gate

inp

ut

Gate gate gate

input

Gate

2 ns

03877 S3185G

07263

03877

07263

04713

01295 01295 01

18324 SP322B

04

01295 01295 01295 047 01295 01295

01295 04713

FDG1088

S3185G

FDG1088

SZ

10939-98

SN14656 SN4505

295

SN14656

713 MC846P

SN

146 SN4505 SN14656

13 MC846P

SN 15031

SN4605 SN14656

MC846P

56

obd obd

6

-5

Section VI

REF

ERENCE

DESIGNATOR

AJ

(Cont'd)

I

C19

IC20

C2

1

I IC22 IC

23

I

C24

Table 6-1. Replaceable Parts (Co

-hp-

PART NO

1820-0307

820-0094

1 1

820-040

1

820

-0094

1820-0307 IC: Hex inverter

1820-0094

TQ

.

9 1

IC: Hex inverter IC:

DTL DTL DTL

Quad 2Quad 2Quad

IC: Digital IC:

IC:

nt'd)

DESCRIPTION MFR.

input

Gate

inpu

t Gate

2-input Gate

01295 04713 04713 04713 MC846P 01295 04713 MC846P

MFR.

SN

14656 MC846P SC8176

SN14656

Model

3484A

PART NO.

Jl, J2 J3,J4

J5, J6 J7

L1 L2

Ql

thru

07

Q8

thru

Q

14

Q15, Q16 Q17

thru

Q20

thru

R1 R2 R3 R4 RS

R6,R7 RS R9 R10 R11, R12

R13 R14

thru

R17

thru R19

R20,

R21

R

22

R23 R24 R25 R26 R27

R28 R29 R30 R31 R32

thru

R35 R36 R37 R38,

R39

Q6 Q13

Q19 Q32

R16

R34

03484-2760 03484-04701

1251-

9170 9140-0210 1

1854-0071 1853-0020 1 18 1854-0053 1854-

1854-0022 3

1

854

0684-2231 R: 0684-1021

0684-1831 0684 0684

0684 0684 0684 0757-0436 0684

0698-5912 1 R: 0757-0441 0684-223 0684 0684-4721

0684-104 0684-3921 2 R: 0684 0684-2231 R: f 0684-4721

0684-10 0684-1041 R: 0684 0684 0684

0684-1031

0684-682 0757-0445 0684

1 4 Connector:

1

16

33

-00

16

54-0071

0087

-0071

-1031 7

-2231

-1021 R:

-1031 R:

-15

11

-2231 R:

1 R:

-1021 R:

1 2 R:

-1831 R:

21

-18

11

-3921 R:

-2231

1

-1031

4

25

1 TSTR : Si NPN 2

6 R: 2

1 R: 1 R:

3

2 R:

1 R:

1 R: 1 R:

1

TSTR TSTR: TSTR : SI NPN 2N3391

TSTR: Si TSTR

TSTR

R: R: R:

R:

R: R: fxd comp 1 kil

R: f R:

R: fxd comp

Filler

N

ot

Connec

Filler strip

Connector: Printed c

Bead: Shielding, zinc In

ductor: fxd

fxd fxd comp 1kilohm fxd comp fxd fxd

fxd fxd fxdcomp 150ohms 10% 1/4W fxd flm 4.32 fxd

fxd flm 1.20 fxd flm fxd fxd fxd

f fxd f

fxd

fxd fxd comp

fxd comp 3.9

fxd comp f

xd comp xd

f

20 pin

strip

assigned

tor: 20

100

: Si NPN 2N3391

Si

PNP"*

2N22

NPN

2N3417

: Si

NPN**

: Si NPN

comp xd xd

comp xd

comp 22

comp

xd

comp

flm

2N339

comp

22 kilohms 10% 1/4 W

18 kilohmms 10% 1/4 W

comp

10 kilohms 10% 1

comp

22 kil

comp

1 kilohm 10% 1

comp

10 kilohms 10%

comp

comp 22 comp

comp 100 kilohms 1 comp 3.9

kilohm

22

kilohms 10% 1/4 W

megohm 1% 1/2 W

8.25 kil

ohms 1 % 1 /8 W

kilohms 10% 1/4 W

1kilohm

4. 7 kil

kilohms 10% 1 /4 W

18 kilohms 10% 1/4 W

kilohms 10% 1/4 W

4.7

kilohm

ohm 10%

100

kil

180 ohms 10%

ki

22 kilohms 10% 1

10

kilohms 1

6.8 kil

13.0

kilohm

10

kilohms 1

ircuit

ferrite

microh

18

1

10% 1/4 W

ohm 10% 1/4 W

s 1% 1

10% 1

ohm

s 10% 1

s 10%

ohms 10% 1/4 W

lohms 10% 1

ohms 1

1 % 1

enry

0%

1/4 W

1/4

0%

/8

0%

5%

/4

W

1/4

/8

/4

W /4

1/4 W

1/4

/4

1/4 W

W

1/4 W

W

-hp-

-

hp

-

-hp·

71785

021 82142

01295

·hp· 01295 04713 03508

-hp-

01295

01121 CB2231 01 01 011 01121

01121 01121 01121

14674

0112 91637

91637 01121 0112 0112

01121 01121 01121 CB1831 01121 01121

01121 0112 01121 0112

11

0

01131 CB1031 01121 CB6821 91637 CMF -1/ 10-32 0

11

252-15-30-310

14

56·590-65A 1 /3 15-1315-12J

SKA

l 1

SKA1124 2N2218 4JX1

6N2989

SKA11

121

CB1021

121 CB1831

21

CB

1031

CB2231 CB1021

CB103 CB151 C4T

1

1 1

1 1 CB3921

21 CB2231

21

-O

CB223

MFF-1 CM

F-1/10-

CB2231

CB1021

CB4721 CB

1041

CB3921 CB2231

CB4721 CB1021

CB

1041

CB

1811

CB1031

1

1 1 /2·

24

10T

32

-1

8

obd

obd obd

obd

6-6

12

00-0432

1251-

250

IC

42

Socket: S

Spring:

1

IC

trip

socket

27264 1938-4

00779

50462-8

obd

Model

3484A

REFERENCE

DESIGNATO

Al

(Cont'd)

R P

-hp-

ART

1

600·0195

1600-01

NO.

96

Table 6-1. Re

TQ

1 Hinge: 1 Hinge:

pla

ceable Parts (C

DESCRIPTION

AC

converter assembly

AC

converter

ont'd

)

assemb

ly -hp-

Section VI

MFR. MFR. PART NO.

hp

-

A4

C1 thru C7 0160C8,C9 C10

thru

C5

ru

C14

C20

u I C3

L 13

C15 C16

C17

C18

CR1

I

C1 thr

IC4, I

J1

K1

L 1 th L14, L15

11151-66501

0160 0160-0300 0170-0066

0180.0197 0160-01

0160-0300

901-00

1

1820· 1

820-0307

12

51-2034 1

0490-0851

91

40

9140-0129

0300

-0161

61

40 1

0094

-0210

PARTS

1

ISOLATED

(Transmitter)

15

C:

fxd

3 C:

1 1

3 IC: 2 IC: Digital

1 Relay : Reed

13

2 Coil:

mylar 0.0027 fxd myl f

xd

mylar

C: C:

fxd

0.027

C:

fxd

2.2 microfarad 1

C:

fxd myl

C:

fxd

mylar 0.0027

Si

Diode:

DTL

Connector: Printed

Coil :

Mo Molded

REQUIRED

REMOTE

ar

ar .01

30

quad 2·

lded choke 1

microfarad 1

.01

microfarad

0.0027 microfarad 1 microfarad 10% 200

microfarad 10%

wiv

30

mA 2 pF 2 ns

input

gate

circuit

00 microhenries

choke

220 microhenries 5%

FOR

OPTION

ASSEMBLY

0%

10%

200 0%

20

vdcw

200

0%

200

vdcw

200

vdcw

200

5%

041

vdcw vdcw

vdcw

-hp-

58289 56289 192P10392-PTS

56289

56289 192P27392-

90201

56289 192P10392-PTS 56289

07263 FDG1

01295 01295

71785

-hp-

82142 15-1315-12J 82142

192P27292-PTS 192P27292TAS225K020P1A

192P

SN450 SN14656

252

15-13

PTS PTS

27292-PTS

088

1

-10-30-300

15-20J

obd

0 1 thru

R1 R2 R3 R4 R5

R6 R7 RS R9

A5

Cl C2,C3 C4

06

1854-007 1

0684

-3921 1 R: 0684-8221 0684-1031 0684-10

21 1 R:

0684

-3311

068

4-2221

0684

-8221 0684

-15

41

0684-8221

03

40-0060

111

61-27401

11151-66502

0160-0153 0160-0300 0180-01

97

6

TSTR: Si

3 R:

1 R: 1 R:

1 R:

R:

1 R:

R:

2

Terminal:

1

Shield:

1

REMOTE

1

c

2

c

1

c

NPN

fxd

comp

3.9

So

8.2

330

lder

kilohms kilohms 10%

kilohms 10%

ohms ohms

kilohms 10%

ohms 10% 1

stud,

nted circuit

fxd

comp

fxd

comp 10

fxd

comp 1 kil

fxd

comp

fxd

comp 2.2 kilohms 1

fxd

comp 8.2

fxd

comp 150 kll

fxd

comp 8.2 kilohms 10% 1

Flex, pri

PROGRAM

(Receiver)

fxd

0.001 microfarad 10% 200

fxd 0.0027

fxd

microfa

2.2

microfarads 10%

rad 10% 200

10%

1/4 1/4 W

1/4 /4 /4

0%

1/4 W 1/4

lon insul

/4

W W

/4

W

ator

10% 1 10% 1

tef

ASSEMBLY

vdcw

20

vdcw

W

vdcw

-hp·

0112

1 01121 CB8221 01121 CB1031 01121 0112

0112 01 0112 01

98291 FT

-hp-

CB3921

CB1021

1 CB3311

1

CB2221

121 C88221

1 CB1541

121 CB8221

-hp-

56289 56289

. 90201

192P10292192P27292-PTS

TAS226K020PI A

-E-

15

obd

PTS

6-7

Section VI

REFEREN

DESIGNATOR

AS

(Cont'd)

CR1

thru CR6 CR7

thru CR1

I

C1

thru

L1

thru L 13 9140-0129

L14, L1

01

thr

u 0

5

CR5

IC5

14

CE

2

PART NO.

1901-0040 1910-0016 1 Diode: 1910·0040

1820-0307 5 IC: Digital

9140-02

1

·hp·

10 2 Coil:

854

-0071

Table 6-1. Replaceable

TQ

11

Diode:

Si

30

Ge

60

e: Si

: Molded choke

Molded

: Si NPN* •

13

14

Diod

Coil

TSTR

DESCRIPTION

wiv

30

mA 2 pF 2 ns

wiv 1 micr

c

hoke

osec

Parts (Cont'

d)

MF

R.

01295 03877 01295

29

01

82142 15-1315-20J 82142

·hp·

PG512 S3

185G

PG512

5 SN14

15-1315-12J

MFR.

656

PART NO.

Model

3484

A

R1 R2 R3 R4 R5

A6

Cl C2 C3

thru

CR

1 thru CR6 CR7 CR8

thru

CR

12 CR13

CR

14 CR15 CR16 CR17

DSl

C5

CR

11

0684

-2721

0684

-1041 1 R: fxd comp 1

0684-10

31

0684

-1021 1 R:

0684

-2721 R:

11152-66501

0150-0093 0180

-0291 1 C:

0150-

0093

1901-0040

1902-3149 1901-0040 1901-

0546

19

01-00

40

1901-0546 1902

-3171 1 1902-0029 1901-

0040

1

970-0052

2 R: f xd comp 2.7 kilohms 1

1 R:

1

OHMS

4 C:

C:

12

Diode:

1

Diode: Brea Di

2 Diode:

Diod Diode:

Diod

1

Diode: Breakdown Diode:

1

Tub

00

fxd

comp

fxd

comp 1

fxd comp 2.7

PARTS

kilohms 10

10

kilohms 10% 1/4 W 01121

kilohm 10% 1/4 W

ki

lohms 10% 1/4 W

REQUIRED

CONVERTER

fxd

cer 0.01 fxd 1.0 microfarad 10% fxd cer 0.01

Si

ode:

Si Si

e:

Si Si

e: Breakdown 11 V 5%

Si

e: Surge Voltage Prote

microfarad+ 80% · 20% 1 mic

rofarad + 80% · 20%

30

wiv

30

mA 2 pF

kdown

wiv wiv

wiv

30 30

30

9.09 V 5% mA

mA

12

.1 V 5%

mA 2 pF 2 ns

30 30

30

0%

1/4 W

% 1/4 W

FOR

OPTION

ASSEMBLY

35

vdcw

2 ns

2 pF 2

ns

2 pF 2 ns

cto

r

042

00

100

vdcw vdcw

01121 01121 CB 1041

011 01

CB2721 CB103

21 CB1021

121

CB2721

1

·hp·

72982 90201 TAS105K035PIA 72982

07263 04713 SZ10939-170 07263 03877 SG-817 07263

03877 04713 04713 07263

25088

Type

801 -K800011

Type

801 ·K80001 1

FDG1

088 FDG1088 FDG1088 SG-817

SZ10939-

SZl

1213-

FD

G1088

B1·C90/20

194 164

obd obd

obd

1

IC

1

Kl K2 0490-0911 K3 thru

KS

L1

820-0307

0490-0802 1 9100-32

9100

-321S

0490·

00

-32

91

9100

-1480 1

6-8

1 IC: Hex inverter

1 S Coil :

080

1 4

16

1

6

Switch Switch Switch

I

: R

eed

(does

Electromagnetic for K 1

:

Reed (does

Coil

: Electromagnetic

:

Reed (does

Coil : Electromagnet

nductor

: f

xd

100

not

include coil I

not

include coiH

for

K2

not

include coil)

ic

for

K3

thru

microhenries 10%

KS

01295

·hp·

-hp-

-hp·

·hp·

-hp-

36196 obd

SN14656

Mod

el

3484A

Section VI

Table 6-

REFERENCE

DESIGNATOR

A6

r

(Cont'd)

01,02 03 04 05

thru

010 011

012,

R1 R2 R3 R4 R5

R6

R7• RS R9 RlO

R11

R12 R13

R14

R15 R16

R17

R1S

, R19 R20 R21

R22 R23 R24 R25* R26

R27 R2S R29 R30 R31

R32 R33 R34 R35 R36

013

thru

09

R38

-hp-

PART NO.

1S54-0071 1S54-

0087 1S53-0020 1S54-0071 1S54-0087 TSTR

1S54-0071 TSTR: Si NPN 2N3391 1S54-00S7

2100

-2060 OS11-2S75 0757

-039S 1 R: OS1

1-2S76 1 R:

2100-2497 1 069S·7S19 1 R: 21

00-2030

OS

11-

2S71

0811-2S75 OS

11-2S77

2100

-2061 1 R: OS11

-2S72 1 R: 0757-0277 2100

-19S4 1 R: 0757

-0401 069S-3449 06S4-

1S31 0698·3515 0698-3151 1 R:

0757

-0401

OS1

1·2S73 1 R:

OS11

-2S74 2100-2060 075

7-0449

0684

-1831 R: 0757-02S3 1 R: 0698

-3572 0757-012S 1 R:

06S4-1

S31 0698-3449 0698-3516 0757-0449 0684

-1831 R:

TQ

s TSTR Si NPN 2N3391

4 TSTR 1 TSTR

TSTR Si

TSTR : Si NPN

2 R: var

R:

2

R: var 2

Factory selected val 1 R: var 1 R: fxd prec

R:

1

1 R:

R:

2 2 R: 7 R:

R;

1

R: 1 R:

Factory selected value

R: var 2 R:

1 R:

R:

1 R:

R:

1.

Replaceable Parts (Cont'd)

DESCRIPTION

Si

NPN 2

N3417

PNP••

Si

NPN 2N3391

Si

NPN

2N3417

50

ohms 10% fxd prec fxd fxd

fxd

fxd fxd

var fxd fxd flm 49.9 ohms 1% 1/S W var

fxd flm 100 ohms 1% 1/S W fxd f f fxd

fxd fxd fxd

fxd fxd fxd fxd fxd

fxd f fxd fxd fxd

ww

flm 75.0 ohms 1% 1

prec

ww

kilohms 10

S.SS

megohms 0.25%

20

kilohms 10% 1/2 W

ww

prec

ww 9 kilohms 0.05

prec ww 90.9 kilohms 0.05%

200 ohms 10%

prec

ww

1

00

ohms 1

flm

2S.7

xd

comp

xd

flm 5.9 flm 2.S7 kilohms 1% 1/8 W

flm

100

prec ww 9. prec ww

50

ohms 10%

flm 20.0 kilohms 1% 1

comp flm 2.00 kilohms 1% flm 60.4

flm

200 kllohms 1% 1/2 W

co

mp

xd flm

28.7 kilohms 1%

flm

6.34

flm

20.0

comp

1/2

9 kilohms 0.05%

890

900 kilohms 0.05%

963

kilohms

1S kil

kilohms

ohms 1% 1/8 W

90.0

1S kilohms 10%

kilohm

1S

kilohms kilohms

18 kilohms 10%

W

kilohm

% 1/2 W

ue

1/2

ohms 0.1 %

0% 1/2

ohm

s 10% 1/4 W

1% 1/8 W

90

kilohms 0.1 % kilohms 0.01%

1/2

W

1% 1/S W

kilohms

/S

W

1 % 1 /

10% 1/4 W 1%

1% 1/S W

W

0.05%

/8

1/4

1/S

1/8 1/8

1/4

%

SW

W W

W

MF

R.

01295 03508

-hp01295 03508

01295 03508

7313S 54294 P

4674

1 54294 7313S

-hp-

7313S 62-210-1 54294 54294

54294 7313S 54294 91637 7313S

91

637

14

674

01121 CB183 1

14674

637

91

91637

54294 54294

7313S

4674

1 01121

14674 91637 CMF -1 91637

01121 14674 14674 1

4674

01121 CB1831

MFR.

SKA1124 4JX16N29S9

SKA1124 4JX16N2989

SKA1124

4JX16N29S9

62

-202-1

CS

C4T·O

PC7

62

-207-1

PC7 PCS

PCS 62

-204-1 PCS CMF-1/10-32·T-1 obd 62-203-1

CMF-1/10-32T C4

7-0

C4

T-0

CMF

-1/10-32 T-1

CMF

-1/10PCS PCS

62-202

C4T

·O obd CB1S31 C4

T-0

MFF

-1/2-T-1 CB1S31

C4

7-0

C4

T-O

C4 T

-0

-1

/10-

PART

-1

32T

-1

32

NO.

obd obd obd

obd obd

o

bd obd obd

obd obd obd

DS1

J1

thru

J13

0340-0060 0360

-1512

0490-0811

2140-0246 5040-0235 5040-0311

16 Terminal: Sol

4

Terminal: Solder

10 Terminal:

Reed

MISCELLANEOUS

1

Lamp: 1 1

Incandesc

Base

: Lampholder

Lampholder:

Not

assigned

der

stud, stud

relay

ent

Chtar

6.3

tef

lon

V

PARTS

9S291 9829 27264

24455

-hp-

FT

-E-15 obd

1

ST-lOOOOL SDX1988

17390

-G

-1 L obd

6-9

Section VI

Model 34

84A

Table 6-1. Replaceable Parts

REFERENCE

DESIGNAT

OR

-hp·

PART NO.

TQ

MISC. PARTS

(Cont'd)

J14

1251-

24

16 1

2376

12511251-0218

1251-0218 1251-0392

1042

12511

251-2384

1251-2417

MP1 MP2 MP3

MP4 5020-

MPS

MP6 5020-6814 2 Guide: MP7 4040-04 17 Latch

MPS

MP9

MP10 MP11 MP12 5060-

MP13 MP14 5060-5951 1

MP15

1510-0057 15

10-

0056

1510-0068

0340-0704 3050-0228

2420-

0002 6817

2190-0047 8 Lockwasher:

2360-01

03484-20102 03484-00502

03484

5060-5953 5060

03484

5040-4539 Bracket:

03484-00502

96

50

40-4539 8

0510-1033 4040-0451 0510

-11

05

-00201 1 Subpanel: Fr

5040-4539

0380-0948 Spacer -hp·

2190-0047 2360-01

96

5060

-5947 1

5060-

5948 5949

5060-

5950

0370-1005

5060

-5952 1

-5954 1

-20101

Connector: Remote, consists

parts:

Body: A&P

17

Contact

2

Moun

Mating connector

Lock

Boot

Lock

Contact 71

Body

2 Binding Post: red -hp2 Binding Post: black -hp· 2 Binding Post: blue -hp-

Mounting

9

Insulator: Binding Washer:

6

Nut: Hex 6-32

6

1 Rear panel -

Screw:

8

1 Sidewall: ri

Bracket:

2 Guide:

1 Retainer: Push 1

Front

4 Retainer: Push on,

Bracket :

Lockwasher: No. 6

Screw:

Knob

1

Knob

1

Knob

Ohms

1

Knob

Ohms

1 K

nob

Knob

Function

Knob

and

1

Knob

and Ohms Functions,

Knob

Ohms

1 Sidewall:

Guide:

(Cont'd)

DESCRIPTION MFR.

of

the foll

owing

Connector

: R & P Connector

ting Post: A & P Connector

for

J14

post (2 required)

: Connector 71468

: Connector

: Connector,

hardware

Flat No. 6

No.

FH

6-32 x

ght

Mount

Top

cover -hp-

Vinyl

panel -hp-

ont

Mounting

FH 6-32 x

Assy:

Termina

Filter

Assy:

Range

Option

Range

Option

Function

only)

Function Functions, Function

Function

Option

Left

Mounting

Top

042)

042,

cover

Assy:

: Sample rate

Assy: Assy:

VAC

Assy: Assy:

:

25

for

binding

post

post,

mint

6

3/8

ing

on,

round round

3/8

l -hp-

(for

instruments

(for

instruments

(for

instruments

(for

inst

Option

(for

instruments wi

Opt

(for

instruments with V

and

VAC

:

gray -hp·

without

with

VOC

ruments

ion

043) 042

)

Option

with

th

043)

VOC

71468 71468 71468

71468 71468 71

-hp-

-hp·

-hp-

·hp·

78553 78553 C1617-010-1

-hp-

-hp·

-hp-

·hp·

-

hp

OC

-hp-

-hp·

MFR. PART

OBC25S-FO obd 030

-1953-000

0 -53018

0·53018 OB

-51212-1

OB 468 468

hp·

·

-51221-1

030

-1952-

OBC25P-

C1

617-010

000

FO

·1

NO.

obd

P12

6-10

1

1251-

0099 0525-0058 0590-0085 0890-0216

2190-0030 3050-0228 4 Washer: Fl 3050-0229 2 Washer: Fl 3050-0448

Connector : Rack & 2 Screw: RH 32

Nut: Hex

2

Tef

lon

2 Washer: Helical

4 Washer: Flat,

tubing: .225"

48

3-48

No. at No. at No. 4

teflon

panel

3

6

long

71785 57-10

500-375

Model

3484A

REFERENCE

DESIGNATOR

MISC. PARTS

(Cont'd)

R1,

R2

R3

R4 R5

-hp·

PART

NO.

2100-2

878

2190-0054 1

2950-0035

2100-2761

1410-011 2

5020-04

46

TQ

Table 6-1. R

Not

assigned

1

var 25

R:

Lockwasher: 1 /2"

1

Nut

: Hex 1

N

ot

ass

igned

1

R: var 250 ohms 1 Bushing 1

Nut

: Hex

ep

laceable Parts (Cont'd

DESCRIPTI

0 kilohms

5/32-32

20

% zero c

ont

ON

.

Secti

on

VI

)

MFR.

7

14

50

71450

COLAO

-hp-

MFR. PART

6090923

obd obd

NO.

S1

S2

S3

S4

S5

3100-2718 2190-0016 2950-0001 4 3

100-1797 2190-0016 2950

-0001

3100-27

10

2190-00

2950-0001 3100-2717 2190-0016 2950

310121903

03484

236

03484

2360-0194

03484-90000

16

-0001 1242

0027

101-0126

-01201

0-0194

-61201

03484-84401

0490-08

01 0490-0802 2

140

-02

4040-0720

46 5060-5940

1

Switch: Rotary,

4

Lockwasher: Nut

1

1 1 Lockwasher: 1 1

1

2 Screw: FH 6-

1

: Hex 3/8-

Switch:

Switch

Switch:

Swit

Shield Shield: Guard,

Operating and Service Manual

KIT:

Swit Swit Lamp T Extender A

Rotary, Lockwasher Nut:

Hex

: Rotary,

Lo

ckwasher: 3/8"

Nut

: Hex 3/8-

Rotary, func Lockwa sher:

Nut

: Hex

ch: Pushbutton

Nut: Swi

: Guard,

Screw: FH 6-

MAINTENANCE

ch: Reed ch: Reed

: Incandescent 6 .3 V

ool

: Reed assembly

3/8-32

tch

sse

mbly

terminal

3/

8" 32 range

3/8"

filter 32

3/8"

/4"

mounting

top

32 x 5/16

bottom

32 x 5/16

tion

76854

76854 obd

76854

7685

81073 81

-hp-

073

4

Type

obd

46-1016 30C1023

·hp-

hp

-

hp

-

44

55

2

-hp-

17390

AM

6

-11

Section VI

MPI

MP2

Mod

el

3484A

1

S4

0

•

0000

MP9

S2

SI

6-12

M

P7 M Pl4

MPl3

MPl

M

PS

MPI

MP2

MP3

2

MPll

MPIO

Figure 6-1. Location of Miscellane

ous Parts.

Model

3484A

Section

Vll

SECTION

CIRCUIT

7-1.

r

INTRODUCTION.

VII

DIAGRAMS

3.

*Average value shown.

Optimum

value selected

at

factory.

Th.is

secti

on

contains

the Model

views

the location

3484

of

the circuit boards are included. Figure

of functional block diagram. Connections connector

P 12

and Figure 7-9. Schematic diagrams Converter Option Operating

7-2.

The foll

and

Service Manual.

NOTES.

owi ng notes

diagrams:

1.

Partial reference designators are shown within assem-

bly outlines. Prefix with assembly number for com-

the

A. Both

diagrams necessary

schematic diagrams

to

and

maintain

pictorial

7-1

shows

the various assemblies, and Figure 7-2 is a

to

the

plug-in

the

Remote

043

are included in the M

apply

connector

114

of the True RMS

in

general

to

are shown in

AC

ode

l l l l 53A

all schematic

4.

- - - - Denotes assembly.

5. Denotes main signal path.

ath

ustm

not

.

ent.

loca

6. Denotes feedback p

7.

s.

I.__ _ ____.

Denotes screwdriver adj

Denotes

front

panel marking.

components

assembly.

ted

on

plete designator.

10.

2.

Compone wise

nt

values are shown as follows unless other-

noted

:

Capacitance

Resistance Inductance

in

microfarads

in

ohms

in

microhenries

All rotary switches shown in extrem clockwise position.

11. All relays s

hown

de-energized.

e counter-

A

§Sl!M

NON

PARTIAL ASSl!MBLY COMPLl!TI!

BLY

A2

I!

REFERENCE

Rl!,.l!Rl!NC

OR

DESIBNATION.

I!

SUBAl!ISl!Ml!ILY

SUBAS§EMBLY

NONI!

NO

Ol!SIBNATIONS

A1

N E

DESIGNATIONS

ARI!

Dl!S10NAT

SHOWN: PR

ION(

COM'PONENT

Q1

R1 J1 J1

S)

OR

l!,.IX

l!IOTH

,.OR

COMP

Ol!S10NATION

A2Q1

A2A1R1

WITH

LETI!

Sec

tion V

II

[I

0 0 0

0

Model 348

A4

And

AS

A6

0

4A

•

0000

AJ

A2

Al

0

7-2

TOP

VIEW

Fi

gure

BOTTOM

7-

.1.

Lo

cation of Asse

mbli

es.

VIEW

I

INPUT

HIGH

~

LOW

)

GUARD~

~

VARIABLE

ATTENUATOR

I

TRUE

RMS

CONVERTER

OPTION

043

AC

-

OT0+1.5V

VARIABLE

FILTER

SELECTION

PROGRAMMING

RANGE

SWITCH

REMOTE

,__

-

MANUAL

REMOTE

RANGE

SELECTION

RANGE

AUTO

RANGE

ENABLE

-

SELECTION

AUTO

ENABLE

CLOCK

UP

RANGE

From

34BOA/B

CONTROL____.,

From

3480A/B

DOWNRANGE From

34BOA/B

AL-

MANl

REMI

TE-

I

-I

I

1

i

FUNCTION

SELECTION

OHMS

UPRANGE

GATING

DOWNRANGE

GATING

>---

AUTO

RANGE

COMMAND

FUNCTION

RELAY

DRIVERS

UPRANGE

ENABLE

DOWNRANGE

ENABLE

RANGE

REGI

STE

FUNCTION

OHMS

RANGE

~

AUTO

R

REGISTER

DECODING

ENABLE

RANGE

-

REM

MAN

AUTO

FUNCTION

RANGE RELAY

DRIVERS

EXTERNAL

TRIGGER

RANGE

I

-

I

EXTERNAL

TRIGGER

GATING

FUNCTION

OHMS/DC

CONVERTER

OPTION

042

l

MANUAL

-

REMOTE

-

AUTORANGECOMMAND

DELAYED TRIGGER INITIATE

AUTO

DELAY

RANGE

FILTER

SELECTION

ENABLE

OT0±15V

~

I

DELAY

GENERATOR

TIME

FILTER RELAY

DRIVERS

AUTO

'

ENl\

~

LE

i

PRINT

COMMAND

Model 3484A

Section VII

~

AUTO

...........

--

OHMS

ENABLE

VARIABLE

ATTENUATOR

FUNCTION

RANGE

REGISTER

DECODING

RANGE

REM MAN

AUTO

FUNCTION

RANGE RELAY

DRIVERS

EXTERNAL

TRIGGER

TRUE

RMS

CONVERTER

OPTION

043

RANGE

-

AC

i----.i

FUNCTION

EXTERNAL

TRIGGER

GATING

0

TO

+ 1.5 V

OHMS/DC

CONVERTER

OPTION

t

MANUAL

-

REMOTE

-

AUTORANGECOMMAND

DELAYED

AUTO

DELAY

042

RANGE

FILTER

SELECTION

TRIGGER INITIATE

ENABLE

VARIABLE

FILTER

0

TO± 15

V

ll

DELAY

.

DELAY

GENERATOR

FIL

TEA

SELECTION

TIME

FILTER

RELAY

DRIVERS

'V

0 0 +

VARIABLE I

FEEDBACK

t

RANGE

MANUAL

_J__

~

15

v

FUNCTION

RANGE I DRIVERS

FUNCTION

RANGE

~~~~ri~~

GGER

ANNUNCIATOR

AND

DECIMAL

RANGE

FUNCTION

BCD

INFORMATION

HOLD

CIRCUIT

-------

MANUAL

AND DELAYED TRIGGER

CIRCUIT

NON-DELAYED

EXTERNAL

PRINT

COMMAND

CIRCUIT

AND

TRIGGER

fJ.iaoA/

E1N

I

SENSE

I

>-------CIRCUITS

t------

,___,__

___

- - - - -

TO

POLARITY

AMPLIFIERS

TO

DISPLAY

CIRCUITS

TO

BCD 0 UTPUT

~~~:~:igR

TO

SAMPLE

GENERATOR

TO

BUFFER/STORAGE

and

BCD

OUTPUT

Cl

RCUITS

PRINT

COMMAND

-

...__

3484A-D-

--

30365

Figure 7-2. Block Diagram.

7-3

3482 A - B

-30355

hp

Part

OHMS CONV

Al

No.

03482-66501

CONNEC

ERTER

T I ON

I 1 I I I

,...._

l"f)

v

<DU">

crcrcra:a:

uuuuu

t I 1 I I

I I I I I I I I

O'>

N-

00

(!)!'-

a::

a::a::a::ua::

uuuu1uuuu

I I I I I l I I

AC CO NVERTER

CO

NNECTI

O N

I

<l

IN

1"1)<0

V

0::

a::a::cr:

10,L

I,

A

A2

hp

Part

No.

03482-66502

Compone to cond is def

nts

in

operation under vary ing temperature

it ions.

ective,

shaded areas are c

If

one of t h

refer

to

Paragraph 5-31.

ese comp

riti

cal

onents

Model

3484

A

Section

VII

----

FILTER I

----+-------------~

-----+-

----+-----

~

---------:-;7-

-i l

11

1 • 0

2

0V i

FILTE

-----------

C

RI

O

20V

--+----.'

C

Rll

r ------

2~V

1

~~----~J

R7

lo2M

r-

--j

w~_J

CR

13

I

+20V

K4A

l K4 B

-

t~-1

.1

"'

:i82

CR

l5

Rl

6

C

. OUT

A

B

R

IO

N

TE

D

FILTER

RELAY

CL

A I

K7 AIK5,A2K3 Al K4

,A

I K

--------

~

--

-,

2QV I

I

RB

620K

~

K5 A

____

I

_

r -

--j

W~

C3

. 0 18

S

OS

ED

5,

AI K6,A2K

3

-------'~ 6gN

R9

K5B

_

_'.

L4

i·

Ol2

l

K6

~-

1

C5

.

+2

0V

L

t

___

IK

039

1

?----~gN~~~~~~C

I

-----'~FRO

I

CO

NVERTER

0

\QJ

ff

-,

/

I ,

J

RELA

DRI

From A3

LOW CURRENT

/uoP~~~

GROUND

CURRENT I H

GROUND : I

FILTER AMP To

AC/

DC

CO

FILTER

AMP OUTP UT: I

/~

DC

FUNCTION

RELAY

VOLTAGE~

FROM A

IOO

FR

OM

ROM A3026

F

Y

VE

FROM

FROM A3 0

~~~~~

R

M

AC/D C

~

I

D~

I

+ 3o v

-4-<

F ~ +3

0V

+11v~3~+11v

I

GROUND

CR39

2o

3V

J2

r+-<4

1J

i I

I I

HI

GHf:<

I

3o

v-}<

-

I I

_I_,,

NVERTER~

.__

I

K

J

~

-

CR40

2o3V

30V

: I

___l__J

CI

302

OMV

A3025

I

OV

IOOV

A30

IOOOV

0 I I

I

I I CR

--+-<

A ( ' I• I

i I'

--+-<

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Figure 7-3. Schematic Diagram, DC Attenuator

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7-5

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03484-66503

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1

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21

19

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17

16

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for inst

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Figure 7-4. Schematic Diagram, Ranging Circuits.

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7

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AO 0 0 0 0 0 0 0 0 0 L

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03484

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--------

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--

---

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16

J:

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Jl4

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(DC)

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ENABLE

(IOOO!l)

(IOOOKn)

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--·---

OH~S

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(IOOn)

BCD INFORMATION

ENABLE ENABLE ENABLE

ENABLE

26

J1s

3

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4

5

9

. 2

2

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F=5ELE

5

1

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ToPl2(18)

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P12 ( 19)

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P12

(20)

E

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P12

(21)

f==FILTER

---------

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t---i-------.To

_

_.

______

----------

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JI

(F)

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Jl(J),J2(E)

..

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JI

( H

),

J2

(D)

IOOMV

-

ENABLE

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IOOOV ENABLE

_______________________________

--

---

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13

DRIVE

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----

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l

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c I

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14

1--------------0......:...

I

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38

I

,----------•

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8

c

o

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39

I

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37

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11

10

I

19

I

20

I

21

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(13)

V

LAMP

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Pl2

( 14)

n

LAMP

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P12

(38)

AC

LAMP

ToPl2(15)

Kn

LAMP

To

P12

(39)

Mn

LAMP

To

P12

(40)

AC(DC)

ORIVE

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A7K2,9,ll

(AC) DRIVE

To

A7Kl,IO,ll

FILTER

OUT DRIVE

ToAIK7

FILTER

A DRIVE

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AIK5

FILTER

A DRIVE

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5,6

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LEFT

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CENTER To

RIGHT To

A

:

B

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P12

(36)

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Pl2

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c

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E

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NOTE:

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LOW=

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I

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3 4

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53

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REAR

Figure 7-5. Schematic Diagram, Function Circuits.

7-9

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7 I

IC3

0 8

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0 0 0 0 0 0 0 0 0 0

COMPONENT SIDE

1

lt~IA-B-30318-B

hp

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14

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10

Part

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PROGRAM

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11151-66502

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Part

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L

1970

BY

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11

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COPYRIGH! 1970

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BY

HEWLETT-PACKARD

6

f-

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L

____________

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COMPANY

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Figure 7-7. Schematic Diagram, Ohms Converter

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3484A

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7-19

Model 3484A

The to

betical

Nam

foll

owing code

e)

and

their

codes

have

numbers latest

supplements. The

been

arbitrarily

are from

the

assigned

CODE

Federal

date

to

Supply Code

of

revision

suppliers

LIST

not

OF

MANUFACTURERS

for

Manufacturers

and the

date

of

appearing

the

in

the

Cataloging

supplements

H4

Handbooks.

Handbooks H

used

appear

4-l

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at

the bottom

to

Code) of

each page.

and

H4-2 (Code

Appendix A

Alpha-

Code

No.

00000

U.S. A Common

00136

McCoy

00213

Sage 00287 00334 00348 00373 00656 00779 00781 00809 00815

00853 00866

00891 00929 01002

01009 01121 01255 01281 01295

01349 01538 01589 01670 01930 01960 02114

02116 02286 02660

02735

02771 02777

02875 03296 03508

03705 03797 03818 03877 03888

03954 04009 04013

04062 04217 04222 04354 04404

04651 04673

04713 04732 04773

04796 04811 04870 04919

05006 05277

Electronics

Cemco, Inc . . . .

Humidial

M

ict

ron,

Garlock

Aerovox Corp

Amp

. Inc. .

Aircraft

Cr

oven,

Northern

Laboratories

8angamo

Pickens

Goe

Engineering

Carl

E.

Microlab

General

Capacitor Alden Allen

Litt

on

TRW

Texas

Transistor

The

Alliance Small Pacific Gudebrod

Amerock

Pulse Fe

rroxcube

America ... Wheelock Cole

Rubber

Amphenol-Borg

Corp.

Radio

conductor

Divisi

Vocaline Co .

Inc

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

Hopkins Hudson Nylon Molding

G.

E.

Dept. Apex Machine Eldema

Parker

Transitron

Pyrofilm

Inc ................

Singer

Finderne

Arrow,

El

ect. Co Taruus Arco

Essex

Hi-Q

Precision Palo

Alto

Packard

Sylvania

Microwave Dakoia Motorola

Prod

Filtron

Div. . Automatic

Sequoia Precision P.

M.

Component

Co. .

Twentieth

Inc. . . . . . . . . . . . . . . .

Westinghouse

Semiconductor

Manufacturer

. . .

...

Electronics

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

Co. , Inc

Inc .

....

.......

..........

Radio

Ltd ... .

Engine

, Inc

Electric

Div

......

Holmes

Inc ..........

Electric Co. ,

Dept

Products

Bradley

Co

Industries

Semiconductors,

Instruments, Inc.,

Products

Mfg. Co ...

Parts

Inc . .

Rela

ys,

Bros

Corp

....

Enginee

rin

Corp.

Signals,lnc ... ..

and

. . .

Corp.

of

and

on

....

of

Engineerin

Tool & Die .....

Semiconductor

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

& Too l Co. . .

Corp

.......

Seal

Co

Electric

Resistor

Co. ,

Diehl

Plant

Hart

and

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

Corp ... ·

Electronic

Wire

..........

Division

of

Paper

Division

Co .

Electric

Device

Engr.

Inc .......

Inc .

Semiconductor

. Div . .

Co.

,Inc.

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

Electric

Wire

Co

Coll

Motor

Company

Mfg.

...........

Century

Electric

. Any

. . . Mount Ho

Corp

..... Rochester, N.

........

......

.......

...

Corp

...

... ...

...

.

Whitby

ering

.........

Co. ,

....

Co .....

Corp ......

.. . ....

Co

.........

...........

, Inc ..... Beverly

Inc

Div .

.. ..

Inc .

.......

. Silk Co ...

...

g Co

.....

of

. . . .

.......

Plastics Electronics

...........

America, Materials

..........

America,

gCo

....

Corp

.....

Prod

.

...

.......

Corp

Co. ,

Div. ,

.........

Hegeman

....

. . .

Inc

.......

Aerovox

Tube

Co

of

Hewlett-

..... .....

Products

Div . . . Mountain View,

.......

Western

Co ...

........

Spring

Co

.....

....

Service

W.

Plastics

Corp

Dept .......

Address

supplier

of

lly

. Danielson, Conn.

Valley

Cherry

New

Bedford ,

.

..

Harrisburg, Pa

,

Ontario, Canada

Burlington, Wis.

....

City

of

Los

...

Livingston, N.J.

..

Hudson

Brockton, Mass.

Milwaukee,Wis.

.....

Lawndale,

.....

... Los Ange

. Van

...

New

.....•

Santa

Saugerties,

. Long

Inc

..

9.lnnyvale, Broadview,

Semi-

Somerville, N.J.

Old Saybrook , Conn.

San Fernando,

..

...

... Springfield,N.J.

.

Syracuse

....

.... Compton,

Los

....

Wakefield, Mass.

Cedar

Sumerville,

Hartford

Lambertville, N.J.

Great

..

Los

..

MyrUe

......

..

Palo

,

..

Culver

... Phoenix, Arizona

Culver

....

Northlake,

Redwood

El

. .

Westchester, Ill

Bridgewater,

,

Los

.

Youngwood,

u.

Springs, Pa.

Colton,

Calif.

Stream,

N. Y.

Hill,

N.

Mass

Boonton, N.

Pickens,

S.

Industry, Cal.

Angeles,

Falls

, N. Y.

Hills, Cal.

Dallas,

Texa

Alliance

, Ohio

les, Cal.

Nuys,

York, N.

Rockford, Ill.

Clara,

Cal

N.

Branch,

N.J.

Cal.

Newark,

N. J .

, N. Y.

Dayton,Ohio

Calif.

Angeles,

Cal.

Knolls

, N.

N.

, Conn .

Neck,

N. Y.

Angeles,

Cal.

Beach

, S. C.

Wheeling, Ill

Alto, Cal.

Cal.

City,

Cal.

City, Cal. City,

Cal.

Monte ,

Cal.

Mass.

Angel••, Cal.

Cal.

Ill

Ill.

Pa.

Code

No.

05347

S.

Y.

J.

.

J.

C.

s

Y.

.

Y.

.

J. J.

Ultronix,

05397

Union

05574

Viking Ind. Inc. . . Canoga

05593

Icore

05616

Cosmo

05624

Barber

05728

Tiffen

. . . . . . . . .

05729

Metro-T

05783

stewart

05820

Wak

06004

Bassick

Warner

06090

Raychem

06175

Bausch

06402

E.

06540

Amatom Electro

06555

Beede

06666

General

06751

Components

06812

To

06980

Varian

07088

Kelvin Electric

07126

Digitran

07137

Transistor

Corp

07138

W

07149

Filmohm

07233

Cinch-Graphik

07256

Silicon

07261

Avnet

07263

Fairchild

Semiconductor

07322

Minnesota

07387

Birtcher

07397

Sylvania

Mt. View

07700

Technical

In

07829

Bodine

07910

Continental

07933

Raytheon

07980

Hewlett-Packard

08145

U.S

08289

Blinn, Delbert

08358

Burg

. . . .

08524

Deutsch

08664

Bristol Co. ,

08717

Sloan

08718

ITT

08727

National

08792

CBS

Operations,Div

08806

General

08984

Mel-Rain

09026

Babcock

09097

Electronic

09134

Texas

09145

Tech.

09250

Electro

09353

C

09569

Mallory

Canada, Ltd

09795

Pennsylvania

09922

Burndy

10214

General

10411

Ti-Tal,

10646

Carborundum

Manufactur

Inc. .

Carbine

Div

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

Electro-Plastics

Plastic

Co.) . . . . . . . . .

Spec.

Colman

Optical

el

Corp .......

Engineering

efield

Engineering

Co. , Div.

Corp

Corp.

and

Co. . . . . . . . . . .

T. A.

Produ

America Co. , In

c.

Electrical

Co. , Inc. . . . . . . . . . . . .

Devi

rrington

Mfg. Co.

Assoc.

Co

... Electronics

....... ....

esting

house Electric

Corp. ,Electronic

Corp.

Transistor

Corp.

Camera & Inst.

Rubber

Corp, The ... ... Monterey

Ele

Operations

Wire

c.

. . . . .

Elect.

Device

Mfg. Co. ,

conduc

tor

Div. . . . . . . . . M

Jersey

New

. Engin

eering Co

ess

Batt

........

Fastener

Company

Cannon Electric

Phoenix

Div. . . . . . . . . . . .

Radio

Electronics

Electr

Miniature

Elect

Corp.

Lamp

Relays

Enclosures

Capacitor

Ind. Inc. Atohm

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

Assemblies

& K

Components

Batter

Corp

Trans

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

Inc

..

er

...........

Corp., Elect.

(c/ o Electrica

Co. .

Co. . . .

Roslyn

...........

Lomb

cts Co.

. . . . . . . New

ces

Inc. ,

Etmac

Co

. . . . .

Co. .

. . . . .

ct.

Prod. Products

Co. . . . . . . .

Division

Co. . . . . .

ery

The

Lab.Inc

ic

....

y Co. of

....... Toronto,

Florocarbon.

. ........

istor

. . . . . . . ...

Co

..... New

Inc

......

...

......

Heights,

......

Co. .

Inc ...

of

stewart

. . . . .

..

Optical

of

nic

Hardware

Instrument

Co. ,Inc

.....

Ariz.

Div

...

,West

Div

.....

..........

...

.........

....

..

Tube

Div

..... Elmira

..

....

City

Corp .... Carle

Corp.

Div..

. . . . Mountain View ,

Co

...... Minneapolis

Inc. ,

....

Mountain View,

Corp

....

Semi-

Co. ,

. .

....... Los

Co

.......

Niagara

Falls,

Corp.

. . . .

. . . . . . . .

Inc . ,

.......

Semiconductor

. of CBS Inc

Co. Dept

...

Div

Co. .

.......

,

.....

.........

Inc ...

.......

, Inc

Inc

.........

Western

.........

Clifton

.....

....

Los

.

Niagara

Address

San

Mateo, Cal.

York

Park,

Sunnyvale,

l

Cleveland,

Rockford,

...

Long

Island

Westbury,N.

..

Santa

Cruz, Cal.

..

Wakefield,

Bridgeport,

Redwood

City,

..

Roc

hest

er ,

. .

Chi

cago, Rochelle, Penacook

Indianap

olis,

Phoenix,

...

Minneapolis,

. . .Hawthorne, Cal.

ountai

.

Los

... . .

....

Los

Arizona

Van

Nuys,

San

Carlos, Cal.

Van

Nuys,

Pasadena,

New

York,

of

Indu

stry,

Place

Culver

City,

,

Park,

Cranford,

Chicago, Ill.

n View,

Rockaway,

Angeles, Pomona,

Ontario, Canada

Angeles,

Waterbury,

Sun

Valley,

Phoenix, Arizona

Paramus,

Lowell,

Cleveland Indianapolis Costa

Mesa, Cal.

Angeles, Calif

Houston,

Burbank, Cal.

Chicago

Newton,

Ontario,

Heights, Penn

Norwalk,

Angeles, Cal.

Berkeley,

Falls

Code

No.

11236 CTS

Chicago

1123 7

, N.

Cal. Cal.

Ohio

Ill.

...

, N.

Mass. Conn.

Cal.

N.

Y.

Ill.

N.

, N. H.

Ind. Cal. Cal.

Cal.

Minn.

, N. Y.

N.

Y.

Cal.

, N.

Y.

Cal. Cal.

, Minn.

Cal. Cal. N.J.

Cal. N.

Cal. Cal.

Cal.

Conn

Cal.

N.J.

Mass.

, Ohio

, Ind.

Texas

, Ill.

Mass

Canada

Conn.

Cal.

, N.

Y.

. Y. Y.

Y.

J.

.

California, Inc.

11242

Bay

11312

Teledyne

Div...

11314

National

11453

Precision 11534 Duncan 11711 Ge

neral Semiconductor Group

11717

Imperial Electronic,Inc..

11870

Melabs

12136

Philadelphi

12361 Grove Mfg . Co. , Inc. . . . . . . Shady

12574 Gulton Ind. Inc. ,

Div.

Clarostat Mfg.

12697 12728

Elmar 12859 Nippon 12881

Metex 12930

Delta Semi

12954

Dickson

13019

Airco

13061

Wilco

13103

Thermolloy. 13327 Solit 13396

Telefunken

Midland-Wright

13835

Pacific

14099

Sem-Tech

14193

Calif. 14298

American

14433

ITT

Int. Corporatio

14493

Hewlett-Packard

Cornell

14655 14674

Corning 14

752

Electro Cube 14960

Williams

15106

The

15203

Webster

15287

Scionics

15291

Adjustable

15558

Micron 15566

Amprobe

15631

Cabletronics 15772

Twentieth

Spring

15801

Fenwal 15818

Amelc

16037

Spruce

16179

Omni-Spectra Computer

16352 16554

Electroid 16585

Boots 16688

Ideal Pree.Mete

De

16758

Delco

17109

Therm 17474

Tranex 17675

Hamlin 17745

Angstrohm

17856

Siliconix 17870

McGraw-Edison 18042

Power 18083

Clevite 18324

Signetics 18476

Ty-Car 18486 TRW

Chomerics

18565 18583

Curtis lnstrument, 18612 Vishay Instruments 18873 E .

I.

Durant

18911 !9315

The

Control

19500

Thomas

Di

19589

Concoa.

Manufac

of

Berne

, Inc. . . . .

Telephone

Slate

Electronics

Inc .

,Microwave . . Seal

Connector

Electronics

Instrument

Division

, Inc . .

a Handle Co . . . .

Daia

. . .

Co. . . .

Filter

Corp

Electric

Co. ,

Electronics

conductor

Electronics

Supply

Co.,

Products

. . .

ron

Devices

(GmbH) . Hanover ,Ge

Div. of

Industries,

. . .

Resistor

Corp

Components,

Semiconductor

Telephone

and

n

Dubli

er

Electric

Glass

Works

Inc. . .

Mfg. Co. . . . . San

Sphere

Co. , Inc . . . Electronics Corp.

. . .

Bushing Co . N. Hollywood,

Electronics

Inst.

Corp.

Century

Co.

Elect.

Inc

o Inc. . . Mountain View ,

Pine

Mica

Inc. . .

Diode

Corp.

Co. Union,

Aircraft

Nut

Jur

Ele

DuP

Bendix

v.of

r Co. ,

Meter

Div. . . . . .

Radi

o Div. of

onetics

Inc. . . . .

Company . . . . . . . Mountain View,

Metal

Products

Pre

e.

Inc . .

Design

Pacific

Corp.

Semiconductor

Corp.

Mfg. Co.

ct.Comp.

. . . . . . . . . . .

ont

and

Mfg. Co. . .

Corp. ,Navigation

Div. . . .

A.

Edison

McGraw-Edison

. .

turer

of

. . . . . So.

Corp. . ..

Corp

. ....

Inc . .

.. ..

Corp.

,

Products

. . Buena

...

....

System

Albuquerque,

. . .

..

Ltd

....

Corp.

. . . C

Inc

...

Newport

Corp

...

Inc

Inc. . ...

, a Div . of

Telegraph

Company. . .

. .Garden

Coil

.......

Co. . . .

Corp..

Inc. . . . . No. Hollywood ,

Co

.......

,Inc

Div

lnc

Co.,

Indus

Scottsdale,

......

....... Det

... Tappan,

Inc

....

Kansas

..

Newbury

.

Santa Moni

Inc .

..

Conshohocken ,

...

West

Corp

. . .

..

Co

......

City,

. . . .

..

Framin

..

. . . .

.

Inc.,

G.

M.

Corp ... . Kokomo , Ind.

Corp.

Manchester,

Inc

.....

Div

....

......

........

Inc

.........

Inc .

...

&

tries,

....

. Baldwin

..

Berne

Pasadena, Cal.

Waltham,

..

Palo

Alto ,

..

Downey,

Jamaica

Costa Mesa,

..

Newark,

Park,

Palo

Alto,

Camden, N.

Grove,' Pa

...

Dover,

W.

Haven,

...

Tokyo,

lark,

Beach,

.

Witchita,

roi

..

Dall

as,

City,

Park,

Palm

Beach,

Loveland

Newark, N.

Corning, N.

San

Gabriel, Cal.

Jose, Cal.

Little

Falls, N.J.

New

York,

Northridge,

Long Island,N.

Lynbrook,

Costa

Mesa,

Santa

Clara,

gha

m ,

Spruce

Pine

Detr

..

Lodi,

Pasadena,

Bro

okl

Canoga

Park,

. . . .

Akron,

..

Sunnyvale,

..

Palo

..

Palo

Sunnyvale,

Hollist

on,

Des

Plaines, Ill

Plain

ville,

Mt.

Kisco, N.

Malvern,

Wilmington

..

Milw

aukee,

Teterboro

West

Orange, N.J.

Park,

Address

yn,

Alto , Alto,

, Ind.

Mass.

Cal. Cal.

, N.

Cal.

N.J.

Cal. Cal.

N.

Conn.

Japan

N.

Cal.

Arizona

Kansas

t,

Mich.

Texas

N.

rman

Kansas

Cal.

ca,

Cal.

Pa.

Fla.

, Colo.

N.

Cal. Cal.

N.

Cal. Cal.

Mass.

Cal.

, N. C.

oit,

N.J. N.J.

Cal.

N.

Cal. Cal. Ohio Cal. Cal.

N. H.

Cal. Cal. Cal.

Mass. Mass.

Pa.

, Del.

Wis.

, N.

Cal.

M.

J.

Ill.

Y.

J.

.

H.

Y.

y

J.

Y.

Y. Y.

Y.

.

Y.

J.

00015-49 Revised

: May, 1970

From

: Handbook

H4

- 1 Dated

Supplements

Januar

y 1970

Appendix A

CODE

LIST

OF

MANUFACTURERS

{Continued)

Model

3484A

Code

No.

LRC

19644 19701 20183 21226 21355 21520 23020

23042 23783 24455 24655 24681 26365 26462 26851 26992 28480 28520 30817

33173 35434 36196

36287

37942 39543 40920 40931 42190 43990 44655 46384 47904 48620

49956

52090

52983

54294

55026

55933

55938

56137

56289

58474

59446

59730

60741

61775

62119

63743

64959

65092

66295

66346

70276

70309

70318

70417

70485

70563

70674

70903

70998

71002

71034

71041

71218

71279

71286

71313

71400

71436

71447

71450

71468

71471

Electronics

Electra

Mfg. Co. . .

General

Atronics

Executone

Fafnir

Bearing Fansteel General

Reed Texscan Corp British

Radio

G.

E.

Lamp

General

Radio

Memcor

Inc.

Gries

Reproducer

Grabert

File

Compac/Hollister

Hamilton

Hewlett-Packard

Heyman

Mfg. Co .........

Instrument

Inc . . . . . . .

G.

E.

Receiving Lectrohm Stanwyck

Ltd.

. . . .

Cunningham

Ltd

. . .

P.R.

Mallory

Mechanical Industries

Miniature Honeywell Inc .

Muter

Co. . . . . . . . . . . .

C. A.

Norgren

Ohmite

Mfg. Co. . .

Penn

Eng. &Mfg. Polaroid Precision

Inst

. Co . . . . . . . . Sou

Microwave & Power Rowan

Controller

HP Co. , Med. Shallcross Simpson

Electric

Sonotone Raytheon

&

System

Spaulding

Sprague

Electric Superior Telex

Corp.

Thomas & Betts

Triplett

Electrical

Union Switch

Westinghouse

Universal Ward-Leonard Western

Electric

Weston

Inst.

Wittek

Mfg. Co. .

Minnesota

Revere

Mincom

Allen

Mfg. Co. .

ll

ied

Control

A

Allmetal Amplex,

Atlantic

India Amperite ADC

Products

Belden

Mfg. Co. . . .

Bird Electric Birnbach Bliley

Electric

Boston

Gear

Murray

Bud

Radio. Cambridge Thermionics Camloc

Fastener

Cardwell

Bussmann

McGraw-Edison

icago

Condenser

Ch Calif.

Spring

CTS

Corp ITT Cannon Cinema.

Manufacturer

.... Hor

seheads,N.

Corp.

, Inc. Long I

Co. ,

Metallurgical

Co. . . . . .

. . . Indianaix>lis, Ind.

Electronics

Division, Nela

Co. . . .

,Comp Co.

of

Watch

Co.

Specialties Co. ,

Tube

Inc.

. . . . . .

Coil

Products!

..

, W. H. & Hill ,

& Co. ,

Precision

..........

Co.

Corp.

. . .

Thermometer

Elec.

Mfg. Co. . .

Co Corp. Co.

Commercial

Div . .

Fibre

Co. , Inc . .

Co.

Elect.

Co. .

Co. . .

and

Signal

Air

Electric

Co. , Inc . .

Inc.

Mining & Mfg. Co.

Div. . . . . . St.

. . . . . New

Screw

Product

Div. of

Chrysler

Rubber

Co. , Inc . . . .

Inc. .

Corp

Radio

Co. . . . New

Co . , Inc. .

Works

Co. of

Texas

Inc.

Corp

Condenser

.....

Mfg. Div. of

Co.

, Inc. .

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

Electric

Div.

Aerovox

Independence, Kansas

. . . . .

Philadelphia,

sland

The

...

Corp

Ltd ...

..

.Div. . . . Huntington,Ind.

Corp

....

America

Co . . .

Dept. .

Hawkesbury, Ontario,

Toronto,

Inc. . ... Indianapolis

Prod

. Co. . .

Bearings,lnc

&

Tube

Div . . .

Co

........

Div.

...........

Apparatus

..

Inst.

Co. Bluffton , Ohio

Div. of

Brake

Co. . .

Co

...

. ....

Co ...

Weston-Newark . .Newark, N.J.

.. .. .....

......

Co . , Inc .

....

Corp

Works,

...

....

. .

Div. of

.

.....

Corp.

....

Corp.

. .

Lindenhurst,

Co.

Corp

........

....

Inc . . . .

Corp

City,

New

Britian, Conn.

. .

..

N.

Chicago,

Metuchen, N.

Washington

Park,Cleveland, Ohio

West

Concord,

New

Rochelle,

, Inc.

Carlstadt, N.

Hollister, Lancaster, Pa. Palo

. .

Kenilworth

Little

Falls

Owensboro,

....

Chicago, Ill.

Ontario, Canada

Akron

..

Keene,

Minneapolis

Chicago, Ill.

Englewood, Col

. ..

...

. . . .

Skokie,

...

Doylestown, Pa.

Cambridge,

thampton, Pa

Waltham, Mass

Westminster,

Waltham,

Selma, Chicago,

.

Elmsford,

So.

Norwalk

Tonawanda

North

Adams, Mass

Bristol,

.

.. ..

Tulsa,

...

Elizabeth,

Pittsburgh, Pa.

Owosso

Mt.

Vernon,

..

New

York

Chicago,

Paul,

Hartford

York, N.

Garden

. .

Detroit, Mich.

Inc .

..

Chicago, Ill.

. . Union

Minneapolis

Chicago, Ill.

..

Cleveland,

York,

..

Quincey, Mass.

Willoughby ,

Cambridge,

... Paramus, N.J.

L.

. . St.

Louis

Chicago, Ill

Pico-Rivera, Cal.

. . . . .

Elkhart

Los

Angeles, Cal.

. . .

..

Burbank, Cal.

Address

N.

,D.C.

Mass

N.

Alto ,

, N. , N.

Canada

, Ind.

, Ohio

N.H

, Minn.

Mass.

N. N.

, Conn.

, N. Y.

Conn.

Okla.

, Mich.

N.

, N.

Minn.

, Conn.

City, N.

City,

, Minn.

Erie, Pa.

Mass.

I.

,

, Mo.

, Ind.

Pa.

Ill.

Cal. Cal.

Ky.

111.

Md.

Ill.

N.

Ill.

N.J.

Ohio

N.

Ohio

N.

Y.

J.

.

Y.

J .

J. J.

.

o.

. .

C. Y.

.

J.

Y. Y.

Y.

.

Code

No.

71482 C. P. 71590

71616 71700 71707 71744 71785

71984 Dow 72136

72619 72656

72699 72765

72825 72928 72962 72964 72982 73061 73076 73138

73293 73445

73506 73559

73586 73682

73734 73743 73793 73846 73899 73905 73957 74276 74455 74861 74868

74970 75042 75263 75378 75382 75818 75915 76005 76210 76433

76487 76493 76530

76545 76703 76854 77068

77075 77221

77252 77342 77630

77638 77764

77969 78189

78277 78283 78290

Clare

Centralab

Globe Commercial Cornish

Wire

Coto

Coil Co. Chicago Cinch

Mfg. Co. ,

Howard

Corning Corp

Electro Motive Mfg. Co. , Dialight

Indiana

Gene

Electroni

General

Cap

Division. Drake Mfg. Hugh

H. Gudeman Elastic

Stop Nut

Robert

M.

Erie

Technolo

Hansen

Mfg. Co. , Inc. . .

H. M.

Harper

Helipot

Div .

Hughes

Products

Hughes Amperex Bradley

Carling

Electric

Circle

F Mfg.

George

K.

Div.

MSL Federal Fischer General Goshen

Stampin

JFD

Electronics

Jennings

Groove-Pin Signalite

J.

H.

Winns, and Industrial Condenser R.

F.

Products

Amphenol-B

E.

F.

Johnson International Keystone CTS

Knig

Kulka

Electric Lenz Ele Littlefus Lord

Mfg. Co. .

C. W.

Marw General

Micamold

James

Millen

J.

W.

Mill

Cinch-Monadnock

Fastener

Mueller

National

Oak

Manufacturing Co. . .

The

Bendix

Electrodynamics

Pacific

Metals

Phaostran

Electronic

Philadelphia

Wire

Corp.

American

Potter & Brumfield

TRW

Electronic

General

Rectifier Resistance Rubbercraft

Shakeproof

Illinois

Sigma

...

Signal

Indicator

Struthers-Dunn

Manufacturer

& Co.

Div. of

Union Inc .

Miniature Lamp

B. J ones Div. .

Corp

Instrum

Eby Inc . .

Co. . . .

Aircraft

Elect.

Semiconductor

Scr Special Industries Co.,

Radio

Inc . . . . Ne

Carbon

hts

ctri

e,

Instrument

er Co

Electric Co....

Union .

Instrument

Tool

........

Plastics

Co Co . , ,Inc.

. . . .

ral

cs Div .

Co.

Hadley Co. .

gic Co. .

of

Garrett

Industries, ew

Corp.

or g

Resistance , Inc. . c Mfg. Co .

Inc.

edel Division

Mfg.

Corp.

Corp

Instrument

Co.

Steel

Mac

Division

Products

Corp.

Division

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The

.....

Works

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Corp.

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Corp.

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Corp.

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al

Products

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kman

Division

Co . .

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Corp.

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Co....

Co. ,

Inc. .

Products, Inc. . ..

Mfg. Co. . . . . Cinc

The ... ..

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Tool

Co ......

Corp.

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Mfg.

Corp .....

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Sons . . . .

Corp

Division

of

Electronic

Co. . .

hine & Foundry

Works

Co.

Co. , Inc. . . St.

Corp ... ..

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Corp.

Co.,

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, Div . of United

.

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Div.

Co. . . . . . San

and

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Div . .

Components

Corp

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Co. . .

of

Calif. . Torrance,

of

.

. . So.

Corp

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. . . . . . New

Inc.

Milwaukee,

New

Providence

. . .

Inc.

Willimanti

..

. . Ke

,

Harwood

Philadelphia,

.

.....

Los

, Inc .

..

Inst.

, Inc.

. . . .

of

Newport

Hicksville

. New

Hartford

. . .

Philadelphia,

..

Ridgefield, N.J.

Winchester,

. . .

....

Corp.

. .

Philadelphia,

....

. . Sandwich,

. . Mt. Ve

Des

San

Francisco,

,

.

...

Inc.

Los San

.. .Cleveland,

.Crystal

N.

Hollywood, Francisco, Ca

. . So.

Philadelphia, Pa.

Co.

....

Div.

. ,

Harrisburg,

Braintree, Mass.

Address

.Chicago, Ill.

Wis.

Chicago,

York, N.

, R.

Chicago, Ill.

..

Chicago, Ill.

Midland, Mich.

c , Conn.

Brooklyn

, N.

asby,

N.

Ne

wark

, N.

Heights, Ill.

..

Angeles, Cal.

Princeton

Fullerton, Cal.

Trenton, N.J.

Brooklyn, N.

San

Danbury

Wase

Newark, N.J

Malden, Mass.

Angeles, Cal.

Carr

Leandro,

Newark,

Pasadena, Cal.

Princeton,

Camden, N.J.

Brooklyn

Pa.

Chicago, Ill.

Union , N.

...

Erie,

Pa.

, Ind.

.Chicago, Ill.

Beach, Cal.

, L. I. , N. Y.

Haven,

Conn.

, Conn.

Pa.

Chicago, Ill.

innati

, Ohio

Elyria,

Ohio

Goshen

, Ind.

Jose,

Cal.

ptun

e ,

N.J.

Mass

Chicago, Ill.

, Conn.

ca , Minn.

Pa.

Marys, Pa.

rnon, N.

.Chicago, Ill.

Plain

es ,

..

Erie, Pa

Cal.

Cal. Ohio

N.

Lake, Ill.

Cal.

Ind .

, N.

Cal.

..

Elgin ,

.

York,

N.

Pitman,

N. J .

Code

No.

78452 78471 78488

Ill.

78493

Y.

78553

I.

78790 78947 79136 79142 Ve 79251 79727

Y.

79963

80031 Mepco

J.

80033 Pre

J.

80120 Sc 80131

J.

80207 80223 United

80248

80294

80411

80486 80509 80583 80640 80813 81030

81073 81095 81312 Winc

81349 81483 81541

Y.

81860 82042

82047 Spe

.

82116 82142

82170 82209

82219

Ill.

Y.

82376 82389

Ill.

82647

.

82768 82866

.

82877 82893 83058 83086 New

83125

J.

83148 83186 83298

l.

83315 Hubbell 83324 83330 83332 83385 83501

83594

Y.

83740 Union Car

Pa.

83777

83821 Loyd

111

.

83942

84171

84396

Y.

84411 TRW

Manufacturer

Thompson-Bremer Tilley

Mfg. Co. . . . . San

Stackpole Standard Tinnerman Transformer Ucinite

Co. .

Waldes

Kohinoor

eder

Root , Inc. .

Wenco

Mfg. Co. .

Continental-Wirt

Zierick

Mfg.

Division

stole

hnitzer

Electronic

Standard any manufacturer

Unimax

Switch,

Corp.

Transformer Corp. . ..

Oxford

Electric

Bourns

Inc. . .

Arco

Div. of

All

Star

Products

Avery

Label Hammarlund Stevens, Arnold, Co. ,Inc ...

Dimeo

Gray

International

Grayhill Co. . .

Triad

Transformer

hester

Military

Specification International Airpax

Electronics

Barry

Controls

Carter

Precision

rti

Faraday

El

ectric

Electric

Regulator Jeffers

Electronics

Speer

Carbon

Fairchild

Space & Defense

Magurie

Industries

Sylvania

Electronic

Astron

Corp ..... East

Switchcra!t,