Keithley 236, 237 Service Manual

KE1TH

LEY

1

NSTRUMENTS

Model Model

Service

236 237

Source High

Manual

Measure

Voltage

i

Unit

Source

and

Measure

Unit

Contains

Publication Document

‚

1 T

Ij

Servicing

Date:

October

Number:

F

fl

LI

r

Lt

U

1991

236-902-01

‘

fl

u

i

ii

Information

D

Rev.

n

UI

ri

LILIU

n

for

_I

j

rn

the

o

i

Model

236/237

Keithley period

Instraments,

year

of

1

from

Inc.

date

warrants

shipment.

of

this

WAR

product

RANTY

tobefree

from

defects

in

material

and

workmanship

for

a

Keithley

Instruments,

rechargeable

During

the

fective.

To

exercise

Cieveland,

prepaid,

tion prepaid. least

This ten

Repaired

days.

90

warranty

consent, chargeable instructions.

WARRANTY

THIS

IMPLIED

ANY

REMEDIES

batteries,

warranty

warranty,

this

You

Ohio.

indicated

to

the

or

not

does

or

misuse

batteries,

WARRANTY

PROVIDED

Inc.

diskettes,

period,

will

replaced

apply of

damage

IN

15

warrants

we

write

given

be

service

products

to

product

any

from

LIEU

HEREIN

following

the

documentation.

and

our

at

your

facility.

are

option,

local

assistance

Repairs

warranted

will,

or

call

prompt

LIMITATION

defects

OF

resulting

part.

leakage,

OTHER

This

or

battery

ALL

MERCHANTABILITY

BUYER‘S

ARE

for

items

either

Keithley

OF

from

90

repair

representative,

and

return

for

be

made

the

will

WARRANTY

product

warranty

problems

or

WARRANTIES,

OR

AND

SOLE

days

from

or

replace

instructions.

and

balance

modification

also

does

arising

EXPRESSED

FTTNESS

EXCLUSIVE

the

or

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of

not

from

date

any

contact

product

the

apply

FOR

shipment:

of

product

Keithley

the

Send

retuined,

original

without

normal

warranty

Keithley‘s

to

fuses, wear

TMPLIED,

OR

PARTICULAR

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REMEDIES.

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product,

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failure

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transportation

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INCLU1JIMG

THE

USE.

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NEITHER

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OF BEEN

ADVISED

SHALL

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SUSTAINED

KEITH

Instruments

AUSTRIA: FRANCE GERMANY: GREAT

BRITAIN: ITALY: JAPAN: NETHERLANDS: SWITZERLAND: TAIWAN:

KEITHLEY

INDIRECT,

ITS

OF

IN

INCLTJ1JE,

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Division,

Keithley Keithley Keithley Keithley Keithley Keithley

Keithley Keithley

Keithley

INSTRUMENTS,

SPECIAL,

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BUT

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Instruments Instruments Instruments Instruments, Instruments Instruments Instruments Instruments Instruments

Instruments,

GesmbH SARL•3 GmbH

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Keithley

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AND

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THE

LIMITED

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INJURY

OF

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Garays

des

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West

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ITS

OF

CONSEQUENTIAL

OR

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SUCH

OF

COSTS

TO:

PERSON,

ANY

•

Cieveland,

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0222-804-6548

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EMPLOYEES

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DAMAGES.

REMOVAL

OF

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OR

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SHALL

BE

DAMAGES

INSTRUMENTS,

SUCH

EXCLUDED

INSTALLATION,

AND

TO

81-45-201-2246

•

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01830-30821

FOR

01ff

HAS

886-2-509-4473

Service

Manual

Model

237

High

236

Voltage

Source

Measure

Source

Unit

Measure

Unit

.

%

Rlght$

Instruments,

Reserved

Ohio,

01990,

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Keitbley

AU

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DocumentNnbec236-902-O1

U. S.

Inc.

A.

All

Keithley

Other

brand

products

and

product

are

trademarks

names

are

trademarks

or

registered

trademarks

or

registered

of

Keithley

trademarks

Instruments,

their

respective

of

Inc.

holders.

BESCHEINIGUNG

DES

HERSTELLERS/IMPORTEURS

etwirdbescheinigt,(da3)/dasMODEL mit dieses

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den

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angezeigt

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und

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die

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IS

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Incorporated

CERTIFICATE

1046/1984

Berechtigung

funkentstort

BesUnimungen

ist

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AUF

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BEI

ANDEREN

DER

FUNKENTSTOERBEST1UNGEN

WWD,

23

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ANLAGE,

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Measure Unit

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PRECAUTIONS

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Bei ten. sind tional gefahr oder nahme vor

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Berühren schlüsse, Geräten, Stellen Kabel Testanschlußdeckel Strom Deckelschlosses,

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jeder

eine

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keinen

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gedacht, das

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wenn

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maximalen

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prüfende

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zu

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sichere

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immer

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mit

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237

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alcun

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lato

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superare

pannello

posteriore

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d

strumenti

misura

di

al

procedere

connettori

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di

lailmentazione

del privadipericoli.

dcl

conlemani

i

livelli

gli

e

DI

SICUREZZA

le

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sorgente

di

sorgente

precauzioni

quallficatoingrado

corrente

danni

alla

prima

con

Potrebbero

delle

persona.

d‘utilizzare

estrema esservi

dell‘Apparecchio

americano

vi

buona

prima

necessario

sicurezza,

sono

abitudine

non

dei

liveffi

di

misurare

verificare

accusino

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circuito di

ponti.

cavi

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di

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sicurezza

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quando

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misura

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di

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vokaggio

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attendersi

circuito

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connessione,

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di usura,

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connettori

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massa.

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jiV

iV

1

mV

resolution

single

range

range.

100

source.

0,1—10Hz

<

V

lOmA

CYCLE

(LINE

RESOLUTION

4-Digit

100fA10fA±(0.3

100pA10pA±(0.04

100

3ppm

<

3ppmofrange

<loppm

8mV

(110V

p-p

range).

step,

typical.

lOmA

integration

CYCLE

>10142

paralleled

MEASURE

5-Digit

1pA100

10

1nA100pA±(0035%+700

10

fA

pA1pA

nA1nA

nA10nA

1iA100

10

nA

iA

1

jiA

V

ACCURAC

Year,

(1

18°-28°C)

[1o/IFSI

300jiV

+

X

45OtV)

lOmV)

lmV)

±(O.028%

+

±(O.025%÷ ±(O.025%+

±(O035%+lOOmV)

add

lOOppm

value.

in

Model

237).

of

range

of

range

range).

time

selected).

integration

ACCURACY‘

±(0.3 ±(021

±(0.035%+

±(0.038%+600

±(0.1

time

<2OpF.

by

1

Year,

(1

18°—28°C)

%+100

%+

1

%+

6

%+

60

6

60

6

%+

fA)

2 pA) pA) pA) pA) nA)

nA)

iA)

1

Spedfications

200ppm

arc

2

Offset

specification

coefficient

COMPLIANCE:

5OfA/°C.

Maximum:

Minimum:

Accuracy,

NOISE

(p-p

ranges).

OVERSHOOT: SETTLING

OUTPUT

R,

VOLTAGE

applyfor

5-digit

of

range.

applies

Bipolar

±1100V

(except

±0.1%ofselected

Step

Size: Same

of

range):

0.1—10Hz:

<0.01%

typical

TIME:

<500jisec.

>10142

C:

BURDEN

paralleled by

(as

resolution.

for

23°C±1°C

voltage

±110V

as

an

ammeter):

current

voltage

(lOmA

to

For4-digit

limit

on

<3ppm

0.01% <2OpF

resolution,

with suppression.

with

lOOmA

range.

single

rangeinModel

set

source.

(<20ppm

RL

(on

=

step,

inA

lOk2).

step,

(lOmA

<lmV.

on

R

range).

all

offset

Temperature

value.

inA

and

=

lOk2).

terms

237).

lOnA

SPE,

DC1,

front

BUS

IMPLEMENTATION

COMMANDS:

SPD.

COMMANDS:

FUNCTIONS:

DT1,

CO,

panel

functions

and

Terminator.

addressisset

SPEED SOURCE-DELAY-MEASURE TO

IEEE-488

RATE:

MEASUREMENT

110

bus):

LATENCY

IEEE-488 MULTILINE

UNL, UNILINE INTERFACE

PPo, All

bus,inadditiontoStatus,

Trigger, 1EEE488

EXECUTION MINIMUM

RESPONSE MEASUREMENT CONTINUOUS

IEEE.488 TRIGGER

IFC,

El.

and

from

COMMAND

lmsec.

readings

TIME:

DCL,

REN,

SHI,

setups

Service

front

per

<2msec.

LLO, SDC,

EOI,

AHI,

are

Request,

panel

per

point

SPEED

second.

SRQ

T6,

TEO,

available

menu.

CYCLE

a

(as

source): into (source

GET,

ATN.

L4,

over

Output

internal

GTL,

LEO,

the

Format,

TIME:

25msec.

DC

UNT,

SRI, RLI,

IEE&488

lmsec.

buffer.

value

EOI,

over

GENERAL LOAD

CAPACITANCE:

REMOTE

Maximum resistance

GUARD:

ISOLATION

with MAXIMUM CONNECTORS:

TEMPERATURE COEFFICIENT

ENVIRONMENT:

Operating:

Storage: WARM-UP: COOLING: POWER:

110V DIMENSIONS,

(3.5 ACCESSORIES

Model Model

ACCESSORIES

Model

SENSE:

lk2

a

(as

Output

Maximum

Offset

(Output

500pF.

COMMON

x

±(0.l

derate

0°—50°C,

RH/°C,

3%

—25°

to

One

Internal

105—125or210—250V

and

180—220V

in.x17.125

WEIGHT:

SUPPLIED:

7078-TRX-3:

236-ILC-3:

AVAILABLE: 8000-10: 8000-14:

Stable

Corrects

per

sense

source)

Output

LO

MODE

70% 35°—50°C.

fan

forced

version

x

17.625

Triax Interlock

Equipment Equipment

lead

to

Input/Output:

89mm

voltage

Resistance:

Relative

Outputs: Trigger

Interlock:

applicable

65°C.

hourtorated

in.

forupto

Output

3-lug

3-pin

accuracy

relative

in.).

to

into

rated

for

is

O.52.

l2k2.

Current:

chassis):

VOLTAGE:

triax.

miniature

(O°-18°C

accuracy.

cooling.

air AC

(external

available.

high

Net

Triax

Cable

Rack Rack

20,000pF

2V

HI: ±2mV

specification)/°C.

humidity

Cable,

typical.

drop

in

accuracy.

±2mA.

max.

Typically

200V.

BNC.

DIN.

&

28°-50°C):

up

switch

100VA

max.

x435mmwide

weight

9kg

0.9m

for3SMUs for

4

SMUs

each

Residual

>10b02

to

35°C.

selectable),

x448mm

(19.75

(3

ft.)

(10 (14

output

in

lbs.).

in.) in.)

lead.

output

parallel

Linearly

90—

deep

Table

Contents

of

SECTION

1.1

1.2

1.3

1.4

1.5

1.5.1

1.5.2

1.5.3

1.5.4

1.5.5

1.5.6

1.5.7

1.5.8

1.5.9 lOOmA

SECTION

2.1

2.2

2.3

2.4

2.5

2.6

2.6.1

2.6.2

2.6.3

2.6.4

2.7

2.8

1

INTRODUCTION ENVIRONMENTAL INITIAL REQUIRED VERIFICATIONS

Equipment Common Voltage Voltage Remote Low

Current

Low

Current

lOOmA

2

=

INTRODUCTION RECOMMENDED ENVIRONMENTAL WARM-UP

LOCK

CAL CALIBRATION

Equipment Voltage lOOmA

Low CALIBRATION CALIBRATION

Performance

COND1TIONS

EQUTPMENT

TEST

PROCEDURES

Characterization

Mode Source Measure Sense

Measure Source

Verification

Verification (inA (inAtolOmA)

Range

Calibration

PERIOD

PROCEDURES

Characterization

Calibration

Range

Current

Calibration

Ranges

ERRORS PROGRAM

Verification

CONDITIONS

Verification

lOmA)

to

Verification

Range

Verification

CALIBRATION

CONDITIONS

Calibration

Measure Source

EQUIPMENT

(inA

Ranges

—

lOmA)

Verification

1-1 14 14 1-1 1-1 1-3 1-6 1-8 1-9 141 1-12 1-15 1-18 1-20

2-1 2-1 2-2 2-2 2-2 2-2 2-3 2-6 2-9 2-11 2-13

246

SECTION

3.1

3.2 3,3

3.4

3.5

3.6

3.7

3.8

3.8.1

INTRODUCTION

LINE FAN BATrERY HANDLING AND DISASSEMBLY SPECIAL TROUBLESHOOTJNG

Maintenance

3

—

REPLACEMENT

FUSE

FILTER

Recommended

CLEANING

REPLACEMENT

HANDLING

CLEANING

INSTRUCTIONS

OF

Test

Equipment

PRECAUTIONS

STATIC

SENSITIVE

DEVICES

3-1 3-1 3-1 3-2 3-4 3-4 3-11 3-11 3-11

382

38.3

3.8Ä

3.8.5

3.86

Diagnostics Power Analog Control Analog Digital

Supply

Switching

and

Display

Checks

Lines

Checks

341 343 344 344 3-16

SECTION

4.1

4.2

4.2.1

4.2.2

42.3

4.2.4

4.3

4.4

44.1

4.42

44.3

4.4A

4.5

INTRODUCTION ANALOG

A/D DIGITAL

POWER

SECTION

51

5.2 5,3 5,4 5,5

INTRODUCTION PARTS ORDERING FATORY SCHEMATIC

4

=

Principles

CIRCUITRY

V/I

Control

Output

Feedback

V/I Resonant

CONVERTER

I/O

Controller Source/Measure Communications Display

5

LISTS

and

Stage

Converter

CIRCUTTRY

Circuitry

SUPPLY

Replaceable

INFORMATION

SERVICE

DIAGRAMS

of

Operation

Readback

(Model

Controller

Parts

237)

AND

COMPONENT

LOCATION

DRAWINGS

4-1 4-2 4-2 4-4 4-6 4-8 4-8 4-9 4-9 4-10 4-10 4-10 4-11

5-1 5-1 5-1 5-1 5-1

List

of

Illustrations

SECTION

Figure Figure Figure Figure Figure Figure

Figure Figure Figure

14 1-2 1-3 1-4 1-5 1-6 1-7 1-8 1-9

SECTION

Figure Figure Figure Figure Figure Figure Figure

2-1 2-2 2-3 2-4 2-5 2-6 2-7

1

Performance

Setup Setup Setup Setup Setup Setup Setup Setup Setup

2

Calibration

Calibration Setup Setup Setup Current Ui U7

Verification

for

Equipment Characterization

for

Common

for

Voltage

for

Voltage

for

Remote

for

Low

for

Low

for

lOOmA

for

lOOmA

Switch

for

Equipment Characterization for Volts for

lOOmA

Ranges

Error

Status

Calibration

Mode Source Measure Sense

Current Current

Measure Source

(Cal

Calibration

Range

Calibration

Word

Status

Verification

Ranges

Verification Measure Source

Range Verification

Lock)

Calibration

Word

Verification

Ranges Verification

Ranges

Range

Verification

(lnAtolOmA)

Verification

(lnA

to

lOmA)

1-4 1-7 1-9 1-10 1-12 1-13 1-16 1-19 1-21

2-2 2-4 2-7 2-10 2-12 2-15 2-16

SECTION

Figure Figure Figure Figure Figure Figure

3-1 3-2 3-3 3-4 3-5 3-6

SECTION

Figure Figure Figure Figure Figure Figure Figure

4-1 4-2 4-3 4-4 4-5 4-6 4-7

3—Maintenance

Line Digital Resonant

Output Analog Model

4

=

Overall

Simplified

Model

Simplified

Damping

Simplified

Voltage

Principles

Switch

Board

Converter Board Board

(Shields

237

Exploded

Block

Diagram

Schematic

236

Output

237

Output Schematic

Relay

SchematicofResonant

and

Line

Fuse

Board

(Model

Removed)

View

of

Operation

of

V/I

Stage (Simplified Schematic

(Simplified Schematic

Stage

of

V/I

Contact

Bounce

237)

Control

Feedback

Converter

and

Readback

Diagram) Diagram)

3-1 3-3 3-5 3-6 3-7 3-9

4-1 4-3 4-5 4-5 4-6 4-7 4-9

List

Tables

of

SECTION

Table

1-1

Table

12

Table

1-3

Table

1-4

Table

1-5

Table

1-6

Table

1-7

Table

1-8

Table

1-9

SECTION

Table

2-1

Table

2-2

Table

2-3

Table

2-4

SECTION

Table

3-1

Table

3-2

Table

3-3

Table

3-4

Table

3-5

Table

3-6

Table

3-7

Table

3-8

Table

3-9

Table

3-10

1

Performance

Required Specifications Model Voltage Voltage Allowable Low Allowable Low

2

Calibration

Required Specifications Model

Calibration

Maintenance

3

=

Line Recommended Power

Analog

Analog Analog Analog Analog Digital Display

Verification

Equipment

Test

For

Alternate

I-Source

263

Source Verification Measure

Current

Test

263

Fuse

Selection

Supply

Switching; Switching; Switching;

Switching; Sensing Switching;

Circuitry

Verification

Reading

Measure

Reading

Source

Equipment

For

Alternate

I-Source

Error

Messages

Troubleshooting

Checks

Equipment

Characteristics

Caiculations

Verification

Caiculations

Verification

Equipment

Characterization

Current Volts Feedback

A/D

Ranging

Multiplexing

for

Low

(inA

for

Low

(inA

to

Equipment

Current

to

lOmA) Current lOmA)

Measure

Source Verification

Verification

(lmA

to

lOmA)

12 1-3 1-5 1-8 1-11 1-13 1-14

....

1-15 1-17

2-1 2-2 2-5 2-14

3-1 3-11 3-13 3-14 3-15 3-15 3-15 3-16 3-17

3-18

4

SECTION

Table

4-1

=

Principles

Volts

Range

of

Relays

Operation

4-8

SECTION

Performance

1

. .

Verification

1

INTRODUCTION

The

procedures

verify

that

the

stated Performance strument misadjustment tion instrument

Before

sure the

tor‘s

1

All

and

1

in the

is

may

also

accuracy,

If

the

instrument

than

1 performance contact factorytodetermine tion.

attempting

you

are

Model

236/237.

Manual

.2

ENVIRONMENTAL

measurements

less

than

at

INITIAL

3

The

Source

3wire

outlined

instrument

specifications

verification

first received

has

occurred

be

performed

orfollowing

year

from the

falls

your

Keithley

anyofthe following

familiar

for

with

Refertothe

complete

shouldbemadeat18-28°C

70%

humidity.

CONDITIONS

WARNING

Measure

power

cord

in

this

section

is

operating within

at

the front

maybeperformed

ensure

to

whenever

NOTE

is stffl

date

outside

the

during

under

representative

calibration,

shipment),

of

the

specified

correct

that

shipment.

thereisquestion

warranty

course

procedures,

the

controls

and

Model 236/237

information.

CONDITIONS

Unitisequippedwith

that

contains

maybeused

the

of

this

no

when

damage

Verifica

if

desired.

(less

and

manual.

the

its

range,

the

or

of

ac

operation

Opera

(6582°F)

a

separate

a

limits

in

make

to

or

of

grotmdwire and

grounded

are

made,

power

outlet electric

Model

The

up

warm

procedures.Ifthe

cation extremesoftemperature paragraph

temperatures

ternal ture.

Typically, unit range.

1.4

Table

verification used tions equipment quired

Table

The are

do measurement

is 10°C

that

RECOMMENDED

1-1

longasthe substitute

as

least

at

ifusing

1-2.

accuracy

based

include

not

caiculate

specifications

then

tions,

outlets,

instrument

ground.

line may

result

shock,

236/237

foratleast

additional

1.2),

it takes

(18°F)

summarizes

procedures.

as

good

characterization

equipment

limits

on

test

falls

limits

and

repeat

Model236/237

the

only

new

must

one

to

as

stated

equipment

slightly

based

test

is

designedtobe

When

proper

chassis

Failuretouseagrounded

in injury

turned

be

hour

before

instrument

(outside

tinte

should

reach

normal

one

additional

outside

the

TEST

recommended

Alternate

connections

is

connected

or

death

on

beginning

has

the

range

be

operating

hourtostabilize

specified

EQUIPMENT

equipment

in

those

that

listed

(paragraph

the

in

Table

the

meets

verification

specifications,

tolerance.

outside

both

equipment

the

on

instrument

accuracy

test.

used

with

to

due

to

and

aliowed

verifi

the

been

subject

specified in

allowed

for

tempera

temperature

for

may

has

specifica Note

1-2.

1.5.1)

is

not

specifications

procedures

and

particular

If

a

allowed

range,

accuracy

specifica

to

in-

a

the

be

that

re

in

they

14

SECTION

Performance

1

Verification

Manufacturer Keithley

Keithley

Keitffley

Keithley

Fluke

Model 263

193A

617

8006

2364LC3

343A

Table

14.

Description 54

/2

Source

54

/2

44

/2

Electrometer

Test

Fixture Interlock

Dc

Voltage

digit

Required

Calibrator/

DMM

Cable

Calibrator

Test

Equipment

Specifications

2nA, 200nA

200mV, 20V4000V 2OO22OOk2

2pA

range; 2OpA 200pA 2nA

range; 2OnA 200nA 2iA

range; 2OjiA

1OV4000V

2OnA

range;

2V

range;

ranges;

±(O.0625%

±(O.035%

ranges;

±(1.6%

ranges;

±(1.6%

±(O.005%

±(O.007%

±(ft007%.

+

±(L6%

±(O.25%+5

±(ft25%

±(025%

±(O.15%

+

±(O.15%

ranges;

±0.002%

66

7

+

4

+

10

+

counts) counts)

1

count)

counts)

1

count)

1

count)

counts)

1

count)

10

+

counts)

2

+

counts)

+

1

count)

2

+

counts)

Valhalla

Keithley

Pomona

t5

The dures the Table dures

VERIFICATIONS

following

forverifying

Model

14. include

equipment.

These

procedures

personnel

236/237

The

using

paragraphs

the

one

using allowable error

that

are

intended

accurate

2500E

R-185-10 R-249400 R2634k R-263400K

7078-TRX

6172

B-24

PROCEDURES

contain the

year

accuracy

the

equipment

reading

could

and

limitsinthese

contributed

be

use

for

reliable

Current

102

Resistor

1002

Resistor

lk2

Resistor

lOOk2

3s1ot

(3

2-slot

Resistor

Triax

required)

male

male triax

required)

(2

Banana

required)

(6

detailed

specifications

only

by

test

equipment.

Calibrator

cable

to

adapter

plug

proce

listed

proce

this

by

qualified

34ug

cable

of

in

If

300mA

±0.1%, ±0.1%, ±0.1%, ±0.1%,

range;

±0.025%

±l0ppm/°C ±20ppm/°C ±l0ppm/°C ±l0ppm/°C

fe

the

instrumentisoutofspecifications

ranty,

refertothe

calibration

WARNING

Lethal

237) fixture, the nected

voltages

(up

willbeconnectedtothe Model

To

avoid

to

interlock

the

Model

safety

sectionofthis

1000V

to

possible

a

circuit

236/237.

and

for the

shock

must

not

manual.

Model

8006

hazard,

be

under

test

con

war

12

Connect earth mum connecting

Also, enabled. HIisalso nals

Table

Instrument DMM

Source

Measure

1

.5.1

the

ground

before

keepinmmd

Thus,

present

of

the

1-2.

Type

dc

Current

dc

Equipment

test

fixture

using

Turn

use.

or

discomtecting

that

a

lethal

on

the

Model

236/237.

Specifications

Equipment

Required Same

(see O.9nA,

Keithley O.9iiA;

9iA, ±l7Oppm

25Oppm

Characterization

#18

off

voltage

Table

9OpA,

screw

AWG

power

all

wires

GUARD

two

For

Specifications

Keithley

as

1-1)

9OnA,

9nA,

263

±l8Oppm

900pA,

rdg

to

wire

or

is

on

OUTPUT

Alternate

193A

Table

(see

±500nA

safety

mmi

before

cables.

always

termi

Same

9mA;

as

14)

Model

Zero

3. At

A.

disconnect nected Connect

B.

nal Sense On

c.

lead

D.

Relocate nal at shown

4.Inthe

actual

the play

the

Set

5. 200mV

cancel

To

6.

its

ing

7.

Remove and +O.9OOOOiA

the

In

8. drop

Model

193A

the

Model

the

of

the

resistance.

of

the

space

the

of

Riooico

Model

range,

input

the

place

space across

193A.

Ohms

193A

SENSE

the

BINDING

to

jamper

that

the

input

of

Model

jumper

the

test

Component

in

Figure

provided

of

value

Model

=

193A and offset,

any

(VOLTS

short

Model

the

to

below,

the

functiononthe

follows:

as

1

terminal

(HI)

jumper

POST

to

socket,

test

Model

the

enable

193A,

back

socket.

Make

Test

1-1.

below,

lOOk2

the

193A.

the

to

disable

zero HI

to

the

from

263

100kL2

resistor

useapencil

resistor

Performance

whose

on

2

SENSE

the

This

193A

ZERO

the

to

sure

Module

use

resistor

DCV

ZERO.

Model

the

and

LO)

of

input

in

operate

to

the

from

200k2

the

of

other

the

2

shorts

the

at

SENSE the

are

pencil

a

from

ki2

ftmction

193A

enabling

the

record

display

SECTION

Verification

range.

socket

test

endiscon

Panel.

Signal

termi

(LO)

the

Ohms

socket.

test

to

cancel

termi

1

connections

correct

record

to

the

and

short

by

ZERO.

Model

to

source

voltage

the

of

1

test

as

dis

the

193A

the

order

In and 9jaA,

characterized. 1O2 for

characterization:

1.

2.

verify

to

measure

O.9mA

9OjaA,

resistor

Connect and

Model

Install

the KELVIN Configure

Model

GUARD

range,

ranges

and

the

For

is

characterized.

Model

the

8006

lOOk2

CLIPS

the

source

Amps

—

263

of

the

9mA

lOmA

263

fixture

test

resistor

socket

test

enabled

Model

outputs

source

Perform

source,

(in

of

DMM

and

function,

and

shown

as

Table

the

output

lOOj.tA

1OiA,

1iA,

the

imA

and

236/237,

of

the

Mode1263

measure

the

following

14)

test

follows:

193A

Figure

in

the

fixture.

Model

as

+O.90000pA

in

standby.

the

source

O.9iA,

range,

steps

DMM

1-1.

AXIAL

on

2i.tA

are

of

mV

current

the

for

the

Using

Io9&

through

2iA

1.tA

in

range

measure

pencil,

a Entry

the

of

re

of

1

VOOk2

a

9.

Calculate lOOk2

Io9=

IS

Io.9

Model

the

range

ment

the

cord

1-3.

Table

(to

resistor

VlOOk2

T)

lMOOki2

the

characterized

263. ofthe

calculated

5-1

as

/2

follows:

lt

is

Model

digits)

=___________

used

current

value

the

check

to 236/237,

1-3

SECTION

Performance

Waming: to

Safety

Ground

1

Verification

Banana

Model

Plug

263

Cables

Source

(5)

Ground Link Installed

Figure

14

A.

B.

.

Connections

Schematic

Setup

Model

8006

263

Source

(Source

Equivaent

Equipment Characterization

for

1)

Test

OUTPUT

COMMON

Fixture

Source

LO

Volts

n

Hl

Sense

—7

193ADMM

(Measure

f2

and

V)

14

Keithley 236, 237 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual