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PHILIPS

INSTRUCTION

MANUAL

ANLEITUNG

NOTICE

D‘EMPLOI

ET

D’ENTRETIEN

RCL

Brid

RcLBricke

PM6302

Pont

RCL

9452

063

02..1

PHILIPS!

9499

520

05902

799201/4

Please

note

In

correspondence

concerning

this

instrument,

please

quote

the

type

number

and

serial

number

as

given

on

the

type

plate.

é

Bitte

beachten

Bei

Schriftwechsel

aber

dieses

Gerat

wird

gebeten,

die

Typennummer

und

die

Geratenummer

anzugeben.

Diese

:

befinden

sich

auf

dem

Typenschild

an

der

Riickseite

des

Gerates.

Noter

s.

v.

p.

Dans

votre

correspondance

et

dans

vos

réclamations

se

rapportant

a

cet

appareil,

veuiliez

toujours

indiquer

le

numéro

de

type

et

Je

numéro

de

série

qui

sont

marqués

sur

fa

plaquette

de

caractéristiques.

Important

i

As

the

instrument

is

an

electrical

apparatus,

it

may

be

operated

only

by

trained

personnel.

Maintenance

and

repairs

may

also

be

carried

out

only

by

qualified

personnel.

Wichtig

Da

das

Gerat

ein

elektrisches

Betriebsmittel

ist,

darf

die

Bedienung

nur

durch

eingewiesenes

Personal

erfolgen.

St

Wartung

und Reparatur

diirfen

nur

von

geschultem,

fach-

und

sachkundigem

Personal

durchgefiihrt

werden.

Important

Comme

Iinstrument

est

un

équipement

électrique,

le

service

doit

@tre

assuré

par

du

personnel

qual

lentretien

et

les

réparations

sont

&

confier

aux

personnes

suffisement

quatifiés.

©)

Philips

GmbH

—

Hamburg

—

Germany

—

1979

All

rights

are

strictly

reserved.

Reproduction

or

divutgation

in

any

form

whatsoever

is

not

permitted

without

written

authority

from

the

copyright

owner.

issued

by

Philips

GmbH

—

Werk

fir

Messtechnik.

Printed

in

Germany

Contents

Ai;

4.2,

1.3,

1.4,

3.1.1.

3.1.1.1.

3.1.1.2.

3.1.1.3.

3.1.2.

3.1.2.1.

3.1.2.2.

3.1.3,

3.1.3.1.

3.1.3.2.

3.1.4.

3.1.5.

3.2,

3.3.

3.4,

3.5.

3.5.1.

3.5.2.

3.5.3,

3.6.

3.6.1.

3.6.2.

GENERAL

INFORMATION

introduction

Technica!

data

Accessories

Description

of

the

block

diagram

DIRECTIONS

FOR

USE

Installation

Safety

regulations

Controls

and

sockets

Position

Connection

to

the

mains

Earthing

Operation

Switching

on

the

instrument

Measuring

resistors

Measuring

capacitors

Measuring

inductances

Measuring

with

external

a.c.

voltage

supply

SERVICE

DATA

Circuit

description

Bridge

arrangements

Bridge

for

R

measurement

Bridge

for

C

measurement

Bridge

for

L.

measurement

Zero

indicator

A.c.-d.c.

converter

Operationa!

amplifier

as

a

voltage-current

inverter

Supply

voltage

generator

D.C.

voltage

supply

Supply

oscillator

Arrangement

for

the

searching

range

Current

supply

Gaining

access

to

parts

Maintenance

and

service

Survey

of

adjusting

elements

and

auxiliary

equipment

Checking

and

adjusting

General

test

Adjusting

procedures

Testing

the

bridge

functions

Parts

list

Mechanical

parts

Electrical

parts

36

36

37

38

42

42

43

Inhalt

1.1,

1.2.

1.3.

1.4.

2.1.

21.1,

7a

ee

2.1.3,

2.1.4.

2.1.5,

2.2.

2.2.1.

2.2.2,

2.2.3,

2.2.4,

2.2.5.

Table

des

1.2.

1.3.

1.4.

ALLGEMEINER

TEIL

Einteitung

Technische

Daten

Zubehér

Beschreibung

des

Biockschaltbildes

GEBRAUCHSANLEITUNG

Anschluss

und

Inbetriebnahme

Sicherheitshinweise

Anschluss:

und

Bedienungselemente

Aufstellen

Netzanschluss

Erden

Bedienung

Einschalten

des

Gerates

Widerstande

messen

Kondensatoren

messen

Induktivitaten

messen

Messen

mit

externer

Wechselspannungs-Speisung

matiéres

GENERALITES

Introduction

Caractéristiques

techniques

Accessoires

Description

du

schéma

synoptique

MODE

D'EMPLOI

Installation

Ragies

de

sécurité

Commandes

et

douilles

Position

Branchement

au

secteur

Mise

a

la

terre

Fonctionnement

Mise

en

service

de

l'appareil

Mesure

de

résistance

Mesure

de

condensateurs

Mesure

d’inductances

Mesure

avec

source

de

tension

alternative

externe

15

15

18

18

19

19

19

19

19

19

20

20

20

21

22

23

23

23

25

26

26

26

26

26

27

27

27

27

27

27

27

28

29

LIST

OF

FIGURES

1.

Block

diagram

2.

Front

view

3.

Rear

view

4,

Adjusting

to

the

local

mains

voltage

5.

Principle

of

C-measurements

with

formation

voltage

6.

Principle

of

varicap-measurements

7.

Impedance

level

of

the

bridge

8.

Measuring

circuit

R,

ohmic

resistances

9.

Measuring

circuit

C,

capacitive

resistances

10.

Voitage

diagram

of

a

de

Sauty-bridge

for

loss-free

samples

11.

Voltage

diagram

of

a

de

Sauty-bridge

for

lossy

samples

12.

Measuring

circuit

L,

inductive

resistances

13.

Voltage

diagram

of

a

Maxwell-Wien

bridge

14,

Blanking

signa!

during

changeover

time

of

the

a.c.-d.c.

converter

15.

Response

curve

of

the

zero

indicator

16.

Electronic

switch

for

the

supply-oscitlator

frequency

17.

Voltage

on

+

side

of

capacitor

512

18.

Measuring

set-up

with

standard

resistor

of

100

m&

19.

Adjusting

circuit

for

resistor

712A

20,

Adjusting

circuit

for

resistor

7128

21.

Front

view,

mechanical

parts

22.

Rear

view,

mechanical

parts

23.

Top

view,

mechanical

parts

24,

Printed

wiring

board

25,

Overall

circuit

diagram

BILDVERZEICHNIS

1.

Blockschaltbild

2.

Frontansicht

3,

Riickansicht

4,

Beschaltung

des

Netztransformators

fiir

verschiedene

Netzspannungen

5,

Kapazitatsmessung

mit

Formierspannung

6.

Messen

von

Sperrschichtkapazitaten

FIGURES

1,

Schéma

synoptique

2,

Face

avant

3,

Face

arriére

4,

Adaptation

a

Ja

tension

secteur

5.

Principe

de

mesure

de

C

avec

une

tension

externe

6.

Principe

de.mesure

d’une

varicap

47

48

48

49

4g

49

47

48

48

49

49

49

1.

General

information

AM,

1.2,

INTRODUCTION

The

RCL-bridge

PM

6302

is

used

to

measure

ohmic

resistors

in

the

range

0.05

Q

...

105-MQ,

capacitors

in

the

range

0.5

pF

....

1050

uF

and

inductances

in

the

range

0.5

42H

...

1050

H.

When

measuring

capacitors

and

inductances

also

a

measuring

value

of

the

loss

factor

D

or

the

quality

factor

Q

is

obtained.

For

the

adjusting

a

vernier

with

linear

indicator

scate

is

used.

The

unknown

measuring

value

is

obtained

after

the

adjusting

by

multiplying

the

scale

value

by

the

factor

of

the

selected

measuring

range.

The

bridge

balance

is

indicated

by

a

moving-coil

indicator,

which

is

controlled

by

an

amplifier

with

logarithmic

gain

characteristic,

adjusting

of

the

bridge

sensitivity

being

then

redundant.

Push-button

SEARCH

is

used

to

find

quickly

the

correct

measuring

range

in

the

searching

mode,

For

measuring

electrolytic

capacitors

an

external

formation

voltage

can

be

supplied.

7

By

means

of

an

external

adjustable

d.c.-voltage

it

is

possible

to

measure

junction-capacitances

on

varicaps.

TECHNICAL

DATA

Properties

expressed

in

numerical

values

with

tolerances

stated

are

guaranteed

by

the

factory.

Numerical

values

without

tolerances

stated

represent

the

properties

of

an

average

instrument

and

merely

serve

as

a

guide,

Measurement

of

resistors

(R)

Nominal

range

:

0,05

Q

-105

MQ.

Measuring

ranges

sa

100mQ2-

1

Q

ea

b.

1

Q-

10

2

i

ec

10

2-100

2

§

100

Q-

1

kM

with

overlapping

sub-ranges:

H

S:

VRQ

102

PT

scale

o,5-

10,5

H

f.

10

k2-

100

kQ

t

g

100

kQ-°

1MQ

h.

1MQ-

10MQ

i:

i.

70

MQ

-

100

M2

:

Setting

error

limits

(see

diagram

A,

page

46}

r

|

—

In

sub-ranges

b

toh

:

£

0,5

%

of

measured

value,

additional

i

+

0,15

%

of

end-of-range

value

—

{n

sub-ranges

a

and

i

:

+

1%

of

measured

value,

additional

+

0,2.%

of

end-of-range

value

Measurement

of

capacitors

(C)

Nominal

range

+

0,5

pF

-

1050

uF.

0,1

pF

can

be

measured

‘

Csarapte

=

Cindicated

—

Co

(0.1

pF

21.4

mm

scale

distance

in

range

i)

Self

capacitance

Co

:<0,5

pF

Measuring

ranges

ra,

1004F

-

1000

uF

b.

10KF-

100

gr

co

THF. 10pF

4.

100nE

=

ar

with

overlapping

sub-ranges:

&

1OnF-

100nF

scale

0,5

-

10,5

j

£

tnF-

10nF

:

g.

100pF-

taF

“ho-

10pF-

100pF

i

1pF-

10

pF

Setting

error

limits

(see

diagram

A,

page

46)

—

In

sub-ranges

b

toh

—

In

sub-ranges

a

and

i

Measuring

ranges

for

!oss

factor

D

—

At

1

kHz

for

internal

bridge

supply

—

At

100

Hz

for

internal

bridge

supply

—

Setting

error

limits

Measurement

of

inductances

{L}

Nominal

range

Measuring-ranges

Setting

error

timits

(see

diagram

A,

page

46)

—

In

sub-ranges

b

to

h

—

In

sub-ranges

a

and

i

Nominal

range

for

quality

factor

Q

Nominal

range

for

quality

factor

Q=

D

Measuring

ranges

for

quality

factor

Q

—

Setting

error

limits

Reading

the

measuring

value

Zero

indicator

Reading

Search

mode

Bridge

supply

Internal

—

Nominal

d.c.

voltage

~

Internal

resistance

—

Nominal

a.c.-voltage

—

Nominal

frequency

:

0,6

%

of

measured

value,

additional

£

0,14

%

of

end-of-range

value

:

£1,5

%

of

measured

value,

additional

2

0,15

%

of

end-of-range

value

:

0,01

-

0,14

(200.10-4

—

1400.10-4)

:0,1-

1,4

(100.10~3

—

140.1073)

2

£5%

of

full

scale

value

:0,5

4H

-

1050

H

ta.

tuH-

10

wH

b.

10

wH-

100

wH

ec.

100

wH-

1mH

a

TmH-

10mH

|

with

overlapping

sub-ranges:

e.

10mH-

100mH

scale

0,5

10,5

#100

mH

-

1H

g.

1

H-

10

H

h.

10

H-

100

H

i.

100

H-1000

H

:

*0,5

%

of

measured

value,

additional

+

0,15

%

of

end-of

-range

value

:

+

1,5

%

of

measured

value,

additional

+

0,15

%

of

end-of-range

value

24-15

:

10-200

21-14

7,2-

100

:

+5

%

of

full

scale

value

:

measuring

instrument;

meter

amplifier

with

logarithmic

gain

characteristic

:

linear

scale:

0,5

-

10,5

:

possible

with

1

kHz-internal

bridge

supply;

—

for

capacitance-

and

inductance

measurement

in

ranges

btoh

—

for

resistances

in

ranges

d

to

h;

with

internal

d.c.

bridge

supply

115

real?

:

700

mV

for

ranges

d

toi

70

mV

for

ranges

a

toc

+1

kHz

or

100

Hz

External

|

Nominat

voltage

:6V

:

—

Nomina!

range

setting

:2-7V

a

—

Maximum

value

:10V

!

Frequency

—

Nominal

range

setting

:

100

Hz

-

20

kHz

=

Operating-range

limit

+

100

Hz

-

30

kHz

Formation

voltage

Nominal

range

setting

up

to

60

V.

Supply

only

from

external

galvanic

battery

to

avoid

misreading

:

{nternal

impedance

:

10

Q

or

sampie

impedance;

lower

value

permissible

internal

resistance

:

>

50

Q/V

of

supplied

voltage

(For

current

limiting

at

;

20

mA

in

case

of

defective

sample)

Power

supply

Mains

voltage

:

115

Vac.

or

230

Va.c.

+15

%

i

—

Reference

value

1220

Vac.

:

Mains

frequency

:

48-62

Hz

:

—

Reference

value

:

50

Hz

f

Power

consumption

:3,5W

Environmental

conditions

Reference

temperature

12541°C

Nomina!

operating

temperature

1

+5

to

+40

OC

i

Operating-range

limit

:

0

to

50

°C

Temperature

range

for

transport

and

storage:

—35

to

+80

°¢

Mechanical

data

dimensions

(over

all}

-~

Height

7

14,5em

—

Width

:

24cm

—

Depth

:30cm

Weight

:

approx.

3,3

kg

The

instrument

conforms

to

IEC

348

and

DIN

40050

protection

standards

ACCESSORIES

Supplied

with

the

instrument:

4

—

terminal

adaptor

i

—

short-circuit

plug

—

manual

1.4,

DESCRIPTION

OF

THE

BLOCK

DIAGRAM

(see

Fig.

1)

The

bridge

circuit

comprises

range

resistors,

reference

parts

and

a

fine-adjustment

potentiometer.

The

range

resistors

in

the

bridge

circuit

are

identical

for

all

measurements

and

can

be

switched-over

with

the

range

selector.

For

R-measurement

a

resistor

is

used

as

a

reference,

for

C-measurement

a

capacitor

with

a

series-connected

potentiometer

and

for

L-measurement

a

capacitor

and

a

potentiometer;

these

are

series-connected

in

the

higher

Q-range

and

parallel-connected

in

the

lower

Q-range.

The

fourth

branch

of

the

bridge

is

the

sample

itself.

The

bridge

circuit

is

earthed

at

that

end

of

the

measuring

diagonal

which

is

connected

to

the

adjusting

potentiometer

and

the

reference

parts.

In

this

way,

harmful

influence

of

switching

and

stray

capacitances

remains

small.

The

d.c.

voltage

supply

for

the

bridge

is

originated

from

a

separate

mains

part,

the

input

voltage

of

which

is

tapped

from

a

extra-screened

secundary

winding

of

the

mains

transformer.

The

internal

resistance

of

this

mains

part

is

dimensioned

in

such

a

way

that

low-chmic

measuring

objects

can

not

be

overloaded.

The

a.c.

voltage

supply

for

the

bridge

is

ori

to

the

bridge

circuit

via

a

transducer.

The

meter

amplifier

amplifies

the

voltage

across

the

diagonals

of

the

bridge

circuit.

For

R-measurements

a

d.c.

voltage

appears,

which

is

chopped

by

an

electronic

switch

and

amplified

in

an

a.c.

voltage

amplifier

(identical

for

ail

measurements)

with

high-ohmic

input

resistance.

‘The

output

voltage

of

the

amplifier

is

rectified

and

indicated

with

a

moving-coil

indicator.

As

a

result

of

the

logarithmic

characteristic

of

the

amplification,

the

indication

sensitivity

is

higher

for

lower

input

voltages,

i.e.

near

the

bridge

balance.

Push-button

SEARCH

is

used

to

search

the

correct

measuring

range.

As

long

as

this

button

is

depressed,

the

supply

voltage

of

the

bridge

is

connected

to

a

series

circuit

consisting

of

the

sample

and

the

measuring

range

resistor.

The

valtage

drop

across

the

sample

is

indicated.

In

this

mode

the

meter-amplifier

characteristic

is

switched-over

into

a

linear

amplification

characteristic.

:

inated

from

a

Wien-bridge

oscillator,

the

output

of

which

is

coupled

2.

Directions

for

use

2.1.

INSTALLATION

2.1.1.

Safety

regulations

(see

IEC 348

or

VDE

0411)

Before

using

the

instrument

after

stocking

and

transport,

pay

attention

that

the

instrument

has

not

been

mechanically

damaged.

!f

there

is

doubt

about

the

safety

{of

the

protection)

check

this.

If

the

protection

is

no

longer

guaranteed,

disconnect

the

instrument

from

the

mains

and

do

not

operate

it.

Do

not

open

the

instrument

before

it

has

been

disconnected

from

the

mains.

Maintenance

and

service

works,

which

must

be

done

with

the

instrument

on,

should

only

be

performed

by

a

qualified

technician.

The

mains

connector

may

only

be

plugged

in

a

mains

socket

with

earth

contacts.

it

is

not

allowed

to

make

this

safety

protection

inoperative,

e.g.

with

an

unproper

extension

cable.

2.1.2.

Controls

and

sockets

(see

Figs.

2

and

3}