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(Zif^

KEITH

LEY

Model

169

Digital

Multimeter

Instruction

Manual

Contains

Operating

and

Servicing

Information

Publication

Date:

February

1989

Document

Number:

30181

Rev.

E

WARRANTY

Keithley

Instruments,

Inc.

warrants

this

product

to

be

free

from

defects

in

material

and

workmanship

for

a

period

of

1

year

from

date

of

shipment.

Keithley

Instruments,

Inc.

warrants

the

following

items

for

90

days

from

the

date

of

shipment;

probes,

ca

bles,

rechargeable

batteries,

diskettes,

and

documentation.

During

the

warranty

period,

we

will,

at

our

option,

either

repair

or

replace

any

product

that

proves

to

be

defective.

To

exercise

this

warranty,

write

or

call

your

local

Keithley

representative,

or

contact

Keithley

headquarters

in

Cleveland,

Ohio.

You

will

be

given

prompt

assistance

and

return

instructions.

Send

the

product,

trans

portation

prepaid,

to

the

indicated

service

facility.

Repairs

will

be

made

and

the

product

returned,

trans

portation

prepaid.

Repaired

or

replaced

products

are

warranted

for

the

balance

of

the

original

warranty

period,

or

at

least

90

days.

LIMITATION

OF

WARRANTY

This

warranty

does

not

apply

to

defects

resulting

from

product

modification

without

Keithley's

express

written

consent,

or

misuse

of

any

product

or

part.

This

warranty

also

does

not

apply

to

fuses,

software,

non-

rechargeable

batteries,

damage

from

battery

leakage,

or

problems

arising

from

normal

wear

or

failure

to

follow

instructions.

THIS

WARRANTY

IS

IN

LIEU

OF

ALL

OTHER

WARRANTIES,

EXPRESSED

OR

IMPLIED,

INCLUDING

ANY

IMPLIED

WARRANTY

OF

MERCHANTABILITY

OR

FITNESS

FOR

A

PARTICULAR

USE.

THE

REMEDIES

PROVIDED

HEREIN

ARE

BUYER'S

SOLE

AND

EXCLUSIVE

REMEDIES.

NEITHER

KEITHLEY

INSTRUMENTS,

INC.

NOR

ANY

OF

ITS

EMPLOYEES

SHALL

BE

LIABLE

FOR

ANY

DIRECT,

INDIRECT,

SPECIAL,

INCIDENTAL

OR

CONSEQUENTIAL

DAMAGES

ARISING

OUT

OF

THE

USE

OF

ITS

INSTRUMENTS

AND

SOFTWARE

EVEN

IF

KEITHLEY

INSTRUMENTS,

INC.,

HAS

BEEN

ADVISED

IN

ADVANCE

OF

THE

POSSIBILITY

OF

SUCH

DAMAGES.

SUCH

EXCLUDED

DAM

AGES

SHALL

INCLUDE,

BUT

ARE

NOT

LIMITED

TO:

COSTS

OF

REMOVAL

AND

INSTALLATION,

LOSSES

SUSTAINED

AS

THE

RESULT

OF

INJURY

TO

ANY

PERSON,

OR

DAMAGE

TO

PROPERTY.

KEITHLEY

Keithley

Instruments

Division

/

Keithley

Instruments,

Inc.

28775

Aurora

Road

/

Cleveland,

Ohio

44139

/

U.

S.

A.

/

(216)

248-0400

/

Telex:

98-5469

/

Telefax:

(216)

248-6168

WEST

GERMANY:

Keilhley

Instruments

GmbH

/

Heiglhofstr.

5

/

Munchen

70

/

089-71002-0

/

Telex:

52-12160

/

Telefax:

089-7100259

GREAT

BRITAIN:

Keithley

Instruments,

Ltd.

/

1

Boulton

Road

/

Reading,

Berkshire

RG

2

ONL

/

0734-861287

/

Telex:

847

047

/

Telefax:

0734-863665

FRANCE:

Keithley

Instruments

SARL

/

3

Allee

des

Garays

/

B.P.

60

/

91124

Palaiseau

/

Z.I.

/

1-6-0115

155

/

Telex:

600

933

/

Telefax-

1-6-0117726

Instruments

BY

/

Avelingen

West

49

/

4202

MS

Gorinchem

/

P.O.

Box

559

/

4200

AN

Gorinchem

/

01830-35333

/

Telex:

24

684

/

Telefax:

01830-30821

S>WI

1

ZhKLAND:

Keithley

Instruments

SA

/

Knesbachstr.

4

/

8600

Dubendorf

/

01-821-9444

/

Telex:

828

472

/

Telefax:

0222-315366

AUSTRIA

Keithley

Instruments

GesmbH

/

Rosenhugelstrasse

12

/

A-1120

Vienna

/

(0222)

84

65

48

/

Telex:

131677

/

Telefax:

(0222)

84

35

97

ITALY:

Keithley

Instruments

SRL

/

Viale

S.

Gimignano

4/A

/

20146

Milano

/

02-4120360

or

02-4156540

/

Telefax:

02-4121249

KEITH

LEY

INSTRUMENTS

Model

169

Digital

Multimeter

Addendum

INTRODUCTION

This

addendum

to

the

Model

169

Digital

Multimeter

Instruction

Manual

is

being

provided

in

order

to

supply

you

with

the

latest

information

in

the

least

possible

time.

Please

incorporate

this

information

into

the

manual

immediately.

Page

7-0;

Replace

Table

7-1

with

the

following:

Table

7-1.

Model

1699

Parts

List

Quantity

Kelthley

P/N

Schematic

Designation

1

DZ-62*

VR101

5

FU-13

F101

(3AG)

5

FU-48

F101

(5mm

X

20mm)

1

IC-102*

U103

1

IC-226*

U104,

U105

2

IC-227

U101

1

IC-228*

U106

1

LSI-122*

U102

1

R277-9M

R113

3

RF-28

CR101

thru

GR104

2

RF-34

CR106,CR107

1

RF-39

GR105

1

RT-5

RT-101

1

TG-47

Q102

*Anti-Static

Protection

and

Handling

required.

Refer

to

the

Model

169

Instruction

Manual

for

Special

Procedures

for

Static-Sensitive

Devices.

30181-E-1

/

6-90

KEITH

LEY

INSTRUMENTS

Model

1766

Battery

Ellmlnator

The

Model

1766

Battery

Eliminator

permits

the

user

to

operate

the

176

and

169

from

line

power.

Eliminator

provides

the

necessary

DC

voltage

to

operate

the

176

and

169.

The

Eliminator

precludes

the

use

of

the

battery

pack.

Installation

of

the

Model

1766

is

described

in

the

following

steps.

NOTE

The

following

procedure

is

intended

for

qualified

electronic

maintenance

personnel

only.

SAFETY

SYMBOLS

AND

TERMS

The

symbol

on

the

instnunent

denotes

that

the

user

should

refer

to

the

operating

instructions.

In

this

case

refer

to

the

packing

list.

The

K

symbol

on

the

instrument

denotes

that

lOOOV

or

more

may

be

present

on

the

terminal(s).

The

WARNING

used

in

this

packing

list

explains

dangers

that

could

result

in

personal

injury

or

death.

The

CAUTION

in

this

packing

list

explains

hazards

that

could

damage

the

instrument.

WARNING

To

prevent

shock

hazards,

all

test

leads

should

be

removed

from

the

INPUT

terminals

before

removing

the

top

cover.

Also,

unplug

the

Model

1766

when

installing

or

servicing

it.

1.

Remove

the

top

cover

of

the

Model

176

or

169

by

removing

the

4

slotted

screws

that

are

on

the

bottom

cover.

2.

If

the

battery

pack

is

installed,

remove

it.

Remove

the

existing

spacers

that

are

supporting

the

battery

pack.

As

previously

mentioned,

the

use

of

the

Model

1766

precludes

the

use

of

the

battery

pack.

3.

Put

the

Model

1766

in

place

of

the

battery

pack.

The

1766

fits

on

the

posts

in

the

rear

of

the

bottom

case

(shown

in

Figure

1).

4.

Cut

out

the

specified

section

of

the

rear

label

which

is

shown

m

Figure

1.

Place

the

Hne

cord

with

the

re

taining

clip

into

the

opening

and

secure.

If

installation

of

the

Model

1766

is

for

an

earlier

169

retrofit,

a

rear

panel

label

will

need

to

be

placed

over

the

existing

label.

There

is

a

space

cut

out

on

the

new

label

where

the

serial

number

can

show

through.

Cut

through

both

labels

where

the

line

cord

is

to

fit

through

with

the

retaining

clip.

Refer

to

Figure

2.

5.

Connect

the

Model

1766

to

the

Models

176

or

169

as

shown

in

Figure

1.

Now

reinstall

the

top

cover.

6.

Plug

in

the

Model

176

into

the

line

power.

The

Model

1766

is

capable

of

working

properly

from

the

line

voltages

of

105V

to

250V

at

50Hz

or

60Hz.

The

maximum

power

drain

is

lOVA.

PA-127Rev.

C/7-90

Retaining

Clip

Supplied

Spacers

Model

1766

Battery

Eliminator

Retaining

Ciip

goes

here.

Figure

1

LINE

OPERATED

MODEL

LINE

RATING:

SO

«0Ht.

lOS

2S0V.

lOVI

■«!

INTERNAL

LINE

FUSE:

l/JJ*

SlOW

OLOW

EXTERNAL

CURRENT

FUSE:

H

■•■HOI

ll#»

CAUTION

^

Keithley

ln»trun>e\ti.

Inc.

STANDARD

MODEL

BATTERIES:

I.SV

C

CEllS

10

>1001

EXTERNAL

CURRENT

FUSE:

20

■OIHOl

ilOW

SEE

MANUAL

FOR

OPERATING

INSTRUCTIONS

MODEL

176

OMM

S/N

Cut

out

so

retaining

clip

and

Line

Cord

can

come

through.

Figure

2

PA-127Rev.

C/7-90

Dl786o<E,.

ZONE

LTR.

ECO

NO.

REVISION

DATE

A

c

HI62

CR203.'>.IV

WAS

Cfi202.9.IV

(JQ^

fc

-20-90

PI005

CR20Z

R202

lAAAA

IK

CR20I

N

-1-C20I

470

35V

:_PI006

JI006

^PI004

4PI004

OO

NOT

SCALK

TMI8

ORAWtslO

I

Clevaland.

OMo

44t39

FRAC

st1/«4

SURFACE

MAX.

OATE(g-//-^<0

SCALE

—'

PjO-

'Ml/

uss.

MOOCL

NEXT

ASSEMBt-Y

QTV.

SCHEMATIC.

PC-569

BATTERY

ELIMINATOR

■^"^QA-C

KEITH

LEY

INSTRUMENTS

Keithley

Instruments,

Inc.

28775

Aurora

Road

Cleveland,

Ohio

44139

(216)

248-0400

Telex:

98-5469

Telefax:

248-6168

Certificate

of

Calibration

Model—(.

In

lo

(j>

Serial

No.

SoiS6?

Date

7-/;-9i

This

notification

serves

to

certify

that

the

unit

described

above

has

been

inspected

and

tested

in

accordance

with

specifications

published

by

Keithley

Instruments,

Inc.

The

accuracy

and

calibration

of

this

instrument

are

traceable

to

the

National

Institute

of

Standards

and

Technology

through

equipment

which

is

cali

brated

at

planned

intervals

by

comparison

to

certified

standards

maintained

in

the

laboratories

of

Keithley

Instruments,

Inc.

Calibration

of

this

instrument

was

performed

to

the

NIST

realization

of

the

new

1990

representation

of

the

volt

and

ohm.

The

reference

standards

which

support

this

calibration

are

calibrated

on

a

schedule

to

maintain

required

accuracy

level.

Apphcable

NIST

Test

Report

numbers

are

listed

below:

DC

Voltage:

238386

AC

Voltage:

238764

Resistance:

728/246592

Temperature:

246568

Capacitance:

246592

Edward

T.

Kifer

Quality

Assurance

M

ager

PA-214

Rev.

B

instruction

Manual

Model

169

Digital

Multimeter

©1979,

Keithley

Instruments,

Inc.

Cleveland,

Ohio,

U.S.A

Document

Number

30181

TABLE

OF

CONTENTS

SECTION

1.

GENERAL

INFORMATION

1-1

1-1.

INTRODUCTION

1-1

1-3.

FEATURES

1-1

1-5.

WARRANTY

INFORMATION

1-2

1-7.

CHANGE

NOTICES

1-2

1-9.

SAFETY

SYMBOLS

1-2

1-11.

SPECIFICATIONS

1-2

2.

OPERATION

2-1

2-1.

INTRODUCTION

2-1

2-3.

UNPACKING

AND

INSPECTION

2-1

2-5.

PREPARATION

FOR

USE

2-1

2-6.

Installation

of

Batteries,

if

required

2-1

2-7.

CONTROLS,

INDICATORS

AND

CONNECTORS

2-1

2-8.

Display

2-1

2-10.

Front

Panel

Switches

2-2

2-12.

Input

Connections

2-2

2-14.

Tilt

Bail/Handle

2-4

2-16.

INITIAL

FUNCTIONAL

CHECK

2-4

2-18.

OPERATING

INSTRUCTIONS

2-4

2-20.

DC

VOLTAGE

MEASUREMENT

2-5

2-22.

AC

VOLTAGE

MEASUREMENT

2-5

2-24.

AC

OR

DC

CURRENT

MEASUREMENT

2-5

2-26.

RESISTANCE

(ft)

MEASUREMENT

2-6

3.

PERFORMANCE

VERIFICATION

3-1

3-1.

GENERAL

3-1

3-3.

RECOMMENDED

TEST

EQUIPMENT

3-1

3-5.

ENVIRONMENTAL

CONDITIONS

3-1

3-7.

PERFORMANCE

VERIFICATION

PROCEDURE

3-1

3-9.

Initial

Conditions

3-2

3-11.

DC

Volts

Checkout

3-2

3-12.

AC

Volts

Checkout

3-2

3-13.

Resistance

Checkout

3-3

3-14.

DC

Current

Checkout

3-3

3-15.

ANALYSIS

3-3

4.

ACCESSORIES

4-1

4-1.

GENERAL

4-1

4-3.

MODEL

1600

HIGH

VOLTAGE

PROBE

4-1

4-5.

MODEL

1651

50-AMPERE

SHUNT

4-1

4-7.

MODEL

1681

CLIP-ON

TEST

LEAD

SET

4-1

4-9.

MODEL

1682

RF

PROBE

4-1

4-11.

MODEL

1683

UNIVERSAL

TEST

LEAD

KIT

4-2

4-13.

MODEL

1684

CARRYING

CASE

4-2

4-15.

MODEL

1685

CLAMP-ON

AC

CURRENT

PROBE

4-2

4-17.

MODEL

1691

GENERAL

PURPOSE

TEST

LEAD

SET

4-2

4-19.

MODEL

1699

SPARE

PARTS

KIT

4-2

4-21.

MODELS

1010

and

1017

RACK

MOUNTING

KITS

4-2

5.

THEORY

OF

OPERATION

5-1.

GENERAL

5-3.

OVERALL

OPERATION

5-1

5-6.

SIGNAL

CONDITIONING

5-1

5-7.

AC/DC

Voltage

Measurements

5-1

5-10.

AC/DC

Current

Measurements

5-1

5-12.

Resistance

Measurements

5-2

5-14.

A/D

CONVERTER

n

11

TABLE

OF

CONTENTS

(Cont'd)

SECTION

PM.

5-16.

DISPLAY

CIRCUITS

5-2

5-18.

REFERENCE

SOURCE

5-3

5-20.

LOW

BATTERY

DETECTOR

5-3

5-22.

INPUT

PROTECTION

5-3

5-24.

Voltage

Protection

5-3

5-27.

Current

Protection

5-3

5-29.

Ohms

Protection

5-3

6.

MAINTENANCE

6-1

6-1.

GENERAL

6-1

6-3.

CALIBRATION

6-1

6-5.

Recommended

Calibration

Equipment

6-1

6-7.

Environmental

Conditions

6-1

6-9.

Case

Cover

Removal

6-1

6-11.

Calibration

Adjustment

6-1

6-14.

TROUBLESHOOTING

6-2

6-16.

Special

Handling

of

Static

Sensitive

Devices

6-2

6-18.

Power

Supply

6-3

6-20.

A/D

Converter

and

Display

Driver

6-3

6-22.

AC

Converter

6-3

6-24.

Voltage

Divider,

Reference

Source

and

Ohms

Circuit

6-3

6-26.

Current

Circuitry

6-3

6-31.

LIQUID

CRYSTAL

DISPLAY

REPLACEMENT

6-4

6-33.

BATTERY

REPLACEMENT

6-9

6-35.

CURRENT

FUSE

REPLACEMENT

6-9

7.

REPLACEABLE

PARTS

7-0

7-1.

GENERAL

7-0

7-3.

ORDERING

INFORMATION

7-0

7-5.

FACTORY

SERVICE

7-0

7-7.

SCHEMATIC

7-0

7-9.

COMPONENTS

LAYOUT

7-0

7-11.

MODEL

1699

SPARE

PARTS

KIT

7-0

ILLUSTRATIONS

FIGURE

TITLE

P^

1-1

Model

169

1-1

2-1

Installation

of

Batteries

2-0

2-2

Model

169

Front

Panel

Display

2-0

2-3

Operating

Controls

2-3

4-1

High

Voltage

Probe

and

RF

Probe

4-2

4-2

Current

Probe

and

Current

Shunt

4-3

4-3

Convenience

Cable

and

Connectors

4-3

4-4

Carrying

Case

and

Rack

Mounting

Kits

4-4

5-1

Model

169

DMM

Overall

Signal

Flow

Block

Diagram

5-5

5-2

Simplified

AC/DC

Voltage

Measurement

5-6

5-3

Simplified

AC/DC

Current

Measurement

5-7

5-4

Simplified

Resistance

Measurement

5-8

6-1

Calibration

Adjustment

Location

6-2

6-2

LCD

Assembly

6-4

6-3

Integrator

Waveform

6-6

6-4

AC/DC

Converter

Waveform

6-7

6-5

Current

Fuse

Removal/Repl

acement

6-9

7-1

Covers

and

Panels

7-4

m