Tektronix EXP-16,EXP-16/A Users Guide

EXP-16 and EXP-16/A

User’s Guide

A GREATER MEASURE OF CONFIDENCE

WARRANTY

Hardware

Keithley Instruments, Inc. warrants that, for a period of one (1) year from the date of shipment (3 years for Models 2000,
2001, 2002, 2010 and 2700), the Keithley Hardware product will be free from defects in materials or workmanship. This
warranty will be honored provided the defect has not been caused by use of the Keithley Hardware not in accordance with
the instructions for the product. This warranty shall be null and void upon: (1) any modification of Keithley Hardware that
is made by other than Keithley and not approved in writing by Keithley or (2) operation of the Keithley Hardware outside
of the environmental specifications therefore.

Upon receiving notification of a defect in the Keithley Hardware during the warranty period, Keithley will, at its option,
either repair or replace such Keithley Hardware. During the first ninety days of the warranty period, Keithley will, at its
option, supply the necessary on site labor to return the product to the condition prior to the notification of a defect. Failure
to notify Keithley of a defect during the warranty shall relieve Keithley of its obligations and liabilities under this
warranty.

Other Hardware

The portion of the product that is not manufactured by Keithley (Other Hardware) shall not be covered by this warranty,
and Keithley shall have no duty of obligation to enforce any manufacturers' warranties on behalf of the customer. On those
other manufacturers’ products that Keithley purchases for resale, Keithley shall have no duty of obligation to enforce any
manufacturers’ warranties on behalf of the customer.

Software

Keithley warrants that for a period of one (1) year from date of shipment, the Keithley produced portion of the software or
firmware (Keithley Software) will conform in all material respects with the published specifications provided such Keithley
Software is used on the product for which it is intended and otherwise in accordance with the instructions therefore.
Keithley does not warrant that operation of the Keithley Software will be uninterrupted or error-free and/or that the Keithley
Software will be adequate for the customer's intended application and/or use. This warranty shall be null and void upon any
modification of the Keithley Software that is made by other than Keithley and not approved in writing by Keithley.

If Keithley receives notification of a Keithley Software nonconformity that is covered by this warranty during the warranty
period, Keithley will review the conditions described in such notice. Such notice must state the published specification(s)
to which the Keithley Software fails to conform and the manner in which the Keithley Software fails to conform to such
published specification(s) with sufficient specificity to permit Keithley to correct such nonconformity. If Keithley deter­mines that the Keithley Software does not conform with the published specifications, Keithley will, at its option, provide
either the programming services necessary to correct such nonconformity or develop a program change to bypass such
nonconformity in the Keithley Software. Failure to notify Keithley of a nonconformity during the warranty shall relieve
Keithley of its obligations and liabilities under this warranty.

Other Software

OEM software that is not produced by Keithley (Other Software) shall not be covered by this warranty, and Keithley shall
have no duty or obligation to enforce any OEM's warranties on behalf of the customer.

Other Items

Keithley warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries, diskettes,
and documentation.

Items not Covered under Warranty

This warranty does not apply to fuses, non-rechargeable batteries, damage from battery leakage, or problems arising from
normal wear or failure to follow instructions.

Limitation of Warranty

This warranty does not apply to defects resulting from product modification made by Purchaser without Keithley's express
written consent, or by misuse of any product or part.

Disclaimer of Warranties

EXCEPT FOR THE EXPRESS WARRANTIES ABOVE KEITHLEY DISCLAIMS ALL OTHER WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ALL IMPLIED WARRANTIES OF MERCHANT­ABILITY AND FITNESS FOR A PARTICULAR PURPOSE. KEITHLEY DISCLAIMS ALL WARRANTIES WITH
RESPECT TO THE OTHER HARDWARE AND OTHER SOFTWARE.

Limitation of Liability

KEITHLEY INSTRUMENTS SHALL IN NO EVENT, REGARDLESS OF CAUSE, ASSUME RESPONSIBILITY FOR
OR BE LIABLE FOR: (1) ECONOMICAL, INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, PUNITIVE OR
EXEMPLARY DAMAGES, WHETHER CLAIMED UNDER CONTRACT, TORT OR ANY OTHER LEGAL THEORY,
(2) LOSS OF OR DAMAGE TO THE CUSTOMER'S DATA OR PROGRAMMING, OR (3) PENALTIES OR PENALTY
CLAUSES OF ANY DESCRIPTION OR INDEMNIFICATION OF THE CUSTOMER OR OTHERS FOR COSTS, DAM­AGES, OR EXPENSES RELATED TO THE GOODS OR SERVICES PROVIDED UNDER THIS WARRANTY.

Keithley Instruments, Inc.

Sales Offices: BELGIUM: Bergensesteenweg 709 • B-1600 Sint-Pieters-Leeuw • 02-363 00 40 • Fax: [phone]

CHINA: Yuan Chen Xin Building, Room 705 • 12 Yumin Road, Dewai, Madian • Beijing 100029 • 8610-6202-2886 • Fax: [phone]
FINLAND: Tietäjäntie 2 • 02130 Espoo • Phone: [phone] • Fax: [phone]
FRANCE: 3, allée des Garays • 91127 Palaiseau Cédex • 01-64 53 20 20 • Fax: [phone]
GERMANY: Landsberger Strasse 65 • 82110 Germering • 089/84 93 07-40 • Fax: [phone]
GREAT BRITAIN: Unit 2 Commerce Park, Brunel Road • Theale • Berkshire RG7 4AB • 0118 929 7500 • Fax: [phone]
INDIA: Flat 2B, Willocrissa • 14, Rest House Crescent • Bangalore 560 001 • 91-80-509-1320/21 • Fax: [phone]
ITALY: Viale San Gimignano, 38 • 20146 Milano • 02-48 39 16 01 • Fax: [phone]
JAPAN: New Pier Takeshiba North Tower 13F • 11-1, Kaigan 1-chome • Minato-ku, Tokyo 105-0022 • 81-3-5733-7555 • Fax: [phone]
KOREA: 2FL., URI Building • 2-14 Yangjae-Dong • Seocho-Gu, Seoul 137-888 • 82-2-574-7778 • Fax: [phone]
NETHERLANDS: Postbus 559 • 4200 AN Gorinchem • 0183-635333 • Fax: [phone]
SWEDEN: c/o Regus Business Centre • Frosundaviks Allé 15, 4tr • 169 70 Solna • 08-509 04 679 • Fax: [phone]
SWITZERLAND: Kriesbachstrasse 4 • 8600 Dübendorf • 01-821 94 44 • Fax: [phone]
TAIWAN: 1FL., 85 Po Ai Street • Hsinchu, Taiwan, R.O.C. • 886-3-572-9077• Fax: [phone]

28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: [phone]

1-888-KEITHLEY (534-8453) • www.keithley.com

4/02

EXP-16

and

EXP-IG/A

User’s

Revision

Part

E

-

Number:

Guide

April

1995

61

590

New Contact Information

Keithley Instruments, Inc.

28775 Aurora Road

Cleveland, OH 44139

Technical Support: 1-888-KEITHLEY

Monday – Friday 8:00 a.m. to 5:00 p.m (EST)

Fax: [phone]

Visit our website at http://www.keithley.com

The information contained
Instruments,

of

third parties that

patent

rights

Inc.,

of

Keithley

assumes

may

result

Instruments, hc.

in

this

manual

no

responsibility for its

from

is believed

its use.

to

be accixate and reliable. However, Keithley

use

or

No

license is granted

for

any

infringements

by

implication

of

patents

or

or

other

otherwise under any

rights

KEITHLEY INSTRUMENTS,

OR

CONSEQUENTIAL

PRODUCT
SUITABLE

Refer

All

brand

0

Copyright Keithley Instruments, Inc., 1985,1992, 1995.

All

rights reserved. Reproduction

by

Section 117

unlaw

to

fd

IS

NOT

DESIGNED

FOR

USE

IN LIFE SUPPORT OR

your

Keithley Instruments license agreement

and

product names

of

the 1976 United States

.

INC.,

DAMAGES

WITH

are

trademarks

or

adaptation

SHALL

RELATED

NOT

COMPONENTS

CRITICAL

or

registered trademarks

of

Copyright

BE LIABLE

TO

any part

Act without permission

THE

USE

OF

A

APPLICATIONS.

for

specific

of

this

FOR

ANY

SPECIAL,

OF

THIS

PRODUCT.

LEVEL

documentation beyond that permitted

OF

RELIABILITY

warranty

and liability information.

of

their respective companies.

of

the Copyright owner

WCIDENTAL,

THIS

is

S

The following safety precautions should be observed before using this product and any associated instrumentation.
Although some instruments and accessories would normally be used with non-hazardous voltages, there are situations
where hazardous conditions may be present.

This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety
precautions required to avoid possible injury. Read and follow all installation, operation, and maintenance information
carefully before using the product. Refer to the manual for complete product specifications.

If the product is used in a manner not specified, the protection provided by the product may be impaired.
The types of product users are:

Responsible body

the equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately
trained.

Operators

of the instrument. They must be protected from electric shock and contact with hazardous live circuits.

Maintenance personnel

the line voltage or replacing consumable materials. Maintenance procedures are described in the manual. The proce­dures explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.

Service personnel are trained to work on live circuits, and perform safe installations and repairs of products. Only

properly trained service personnel may perform installation and service procedures.
Keithley products are designed for use with electrical signals that are rated Installation Category I and Installation

Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most mea­surement, control, and data I/O signals are Installation Category I and must not be directly connected to mains voltage
or to voltage sources with high transient over-voltages. Installation Category II connections require protection for high
transient over-voltages often associated with local AC mains connections. Assume all measurement, control, and data
I/O connections are for connection to Category I sources unless otherwise marked or described in the Manual.

Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or
test fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels
greater than 30V RMS, 42.4V peak, or 60VDC are present.

age is present in any unknown circuit before measuring.

Operators of this product must be protected from electric shock at all times. The responsible body must ensure that
operators are prevented access and/or insulated from every connection point. In some cases, connections must be ex­posed to potential human contact. Product operators in these circumstances must be trained to protect themselves from
the risk of electric shock. If the circuit is capable of operating at or above 1000 volts,

may be exposed.

Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance
limited sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards,
install protective devices to limit fault current and voltage to the card.

Before operating an instrument, make sure the line cord is connected to a properly grounded power receptacle. Inspect
the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.

is the individual or group responsible for the use and maintenance of equipment, for ensuring that

use the product for its intended function. They must be trained in electrical safety procedures and proper use

perform routine procedures on the product to keep it operating properly, for example, setting

afety Precautions

A good safety practice is to expect that hazardous volt-

no conductive part of the circuit

5/02

When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main
input power disconnect device must be provided, in close proximity to the equipment and within easy reach of the
operator.

For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the cir­cuit under test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting
or disconnecting cables or jumpers, installing or removing switching cards, or making internal changes, such as in­stalling or removing jumpers.

Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth)
ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the
voltage being measured.

The instrument and accessories must be used in accordance with its specifications and operating instructions or the
safety of the equipment may be impaired.

Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and op­erating information, and as shown on the instrument or test fixture panels, or switching card.

When fuses are used in a product, replace with same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground con-

nections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation re-

quires the use of a lid interlock.

If or is present, connect it to safety earth ground using the wire recommended in the user documentation.

!

The symbol on an instrument indicates that the user should refer to the operating instructions located in the manual.

The symbol on an instrument shows that it can source or measure 1000 volts or more, including the combined
effect of normal and common mode voltages. Use standard safety precautions to avoid personal contact with these
voltages.

The

WARNING

associated information very carefully before performing the indicated procedure.
The

CAUTION

the warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits, including the power

transformer, test leads, and input jacks, must be purchased from Keithley Instruments. Standard fuses, with applicable
national safety approvals, may be used if the rating and type are the same. Other components that are not safety related
may be purchased from other suppliers as long as they are equivalent to the original component. (Note that selected parts
should be purchased only through Keithley Instruments to maintain accuracy and functionality of the product.) If you
are unsure about the applicability of a replacement component, call a Keithley Instruments office for information.

To clean an instrument, use a damp cloth or mild, water based cleaner. Clean the exterior of the instrument only. Do
not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist
of a circuit board with no case or chassis (e.g., data acquisition board for installation into a computer) should never
require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected,
the board should be returned to the factory for proper cleaning/servicing.

heading in a manual explains dangers that might result in personal injury or death. Always read the

heading in a manual explains hazards that could damage the instrument. Such damage may invalidate

Preface

1

Overview

Features
Applications
Accessories

2

Functional Description

Input

Multiplexer

Insfnunentation Amplifier.
CJC Circuit
Power

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

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

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

Circuits
Open-Thermocouple Detection
Signal Filtering
Current-Measuring Resistor

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

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

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

Table

of

Contents

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

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

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

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

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

1-1

i-2

1-2

2.2

2.2

2.3

2.3

2.3

2.4

2.4

2-4

3

Setup

Unwrapping
Locating Components

Activating Open-Thermocouple Detection
Setting Gain
Setting

Selecting
Selecting a

Setting

Using

Using

Installing
Setting

Power

and

Inspecting

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

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

the

Output

Up

Power

+5

External

the

Setting the Jumper
Setting

Notes

Jumpers

a

CJC

Channel

DAS

Board

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

V

and

f12 V External Supplies

+5 V Only

a

PG-408A

+5

V

Jumper

the

Jumper

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

Your

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

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

Channel

DC/DC Converter

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

for

for

Board

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

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

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

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

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

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

an

EXP.16

an

EXP-lG/A (Jumper

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

J9)

.......

3.1

3.2

3.3

3.3

3.5

3.5

3.5

3-7

3.7

3.7

3.7

3.8

3.8

3.9

3.9

4

Wiring and Cabling

Using

the

Main

1/0

Connectors

Connecting

Using

Using

Using

Using

Avoiding Ground Loops

5

Calibration

Equipment Requirements

Instrumentation Amplifier Calibration
CJC Circuit Calibration

6

Troubleshooting

Problem Isolation

Common Problems
Technical Support

Multiple EXP-16s

EXP-16s or EXP-lG/As

Series

Boards

EXP-16s or EXP-16/As

DAS-SPGA/pCDAS-8PGA

EXl-16s

Boards

Board

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

EXP-16s

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

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

and

EXF-16/As

and

EXF'-16/As

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

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

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

and

Solutions

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

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

or

EXP.l6/As

with

with

Board

with

with

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

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

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

DAS-16/1600/1400/1200

a

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

DAS-gAO/LT

aDASCON-1

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

4.

4.2

4.2

4.4

4-5

4-5

4.6

5.1

5.2

5.4

6.

6.2

6.4

1

1

iv

A

Specifications

B

Connector Pin Assignments

C

Operating Notes

Input Channel Selection
Software

D

Channel Numbers

Channel Numbering
Channel Numbering

Index

Support for Low-Level Devices

with

DAS-8 Calls

for

Software

for

8-Channel DAS

for

16-Channel DAS

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

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

Boards

Boards

...........

..........

C.
C.2

D-

D-2

1

1

List

of

Figures

Figure 2.1
Figure 2.2
Figure 3.1
Figure
Figure
Figure

Figure

Figure 4.2

Figure

Figure 4.4

Figure 4.5
Figure 4.6
Figure
Figure
Figure 6.1
Figure

Figure D.1

Figure D.2 . Analog Input Channels

3.3

3.4

4.1

4.3 . S-1600 Cable Wiring

Block Diagram

.

Input Circuit

.

Locations

.

Locations

3.2

.

Gain Switch (set

.

Locating

.

Board Socket

Ph

Assignments

JlmdJ2

Daisy

Chain

EXP-l6/A

C-1800)

A Daisy Chain

Series board with

Eight EXP-16s

Connecting a Grounded Signal Source

Connecting a Floating Signal Source
Locations
Locations
EXP-16

.

Pin Assignments

.

Analog

or

J1

adJ2

Input Channel Numbering

Software Control

5.1

5.2

B.1

.

.

.

.
.
.

.

.

of

anEXP-16 andEXP.l6/A

for

Each Analog Input Channel

of

Em-16 Key Components

of

EXP-l6/A

for

gain

Fin

1

on the

PG-408A

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

of

Main

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

of

a

DAS

and

an

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

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

of

a DAS-16/1600/1400/1200

or

of

Em-16 Calibration Components

of

EXP-l6/A Calibration Components . 5-3

EXP-l6/A System Components

for

Main

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

........

Key

Components

of

50)

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

and

I/O

Connectors

Board with Em-16
STA-XX (all cables

an

STA-XX

EXP- 16fAs

and up

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

.........

..........

1/0

Connectors

for

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

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

....

....

......

or

are

to

...

.....

2.1

2.2

3.2

3.2

3.3

3.8

4-1

4-2

4.3

4.3

4.6

4.6

5.3

6.1

B-1

D-2
D-4

List

of

Table 3.1
Table

3.2

Table

6.1

TabIe

A.1

TabIe

A.2

TabIe A.3
TabIe A.4
Table

A.5

Table A.6
TabIe

D.1 .

Table D.2

Tables

.

Recommended Gains

Channel Selection Configurations

.

.

Problems

Analog

.

Cold-Junction Compensation

.

Gain Relationships

.

Power Requirements

.

Environmental Specifications

.
.

Physical Specifications

Channels

Channels

.

and

Suggested Solutions

Data

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

in

Maximum

Configuration

in

Maximum EXP-16 Series

Configuration

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

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

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

for

Thermocouple Types . .

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

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

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

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

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

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

EXP-8/800

3-4

3.6

6.2

A-1

A-1
A-2
A-2

A-2

A-3

D-1

D-3

V

The

EXP-16

program, and use the
guide

and

EXP-16IA

also

explains how to calibrate and troubleshoot.

EXP-

UserS

16 and

Preface

Guide

describes how

EXP-

16/A expansion accessories. This

to

set

up,

install,

This guide serves data acquisition
programmers, and other users responsible for
wiring
and instructions contained in this guide, you
data-acquisition principles

The

signals

to the Em-I6

and

EXP-I6

Chapter
applications, and accessories.

Chapter

EXP-I

Chapter
Chapter

Em-16
Chapter
Chapter

your
technical

Appendix

and

EXP-16IA

1

provides an overview

2

provides a

6/A, including

3

describes how to set up

4

describes how

or

EXP-l6/A.

5

describes

6

explains how

Em-16 or

functional

bIock

calibration procedures.

EXP-l6/A

support.

A

lists

the specifications

system

and

EXP-l6/A. To

your

WserS

to

Guide

diagrams.

to

connect accessories and

troubleshoot problems

and

designers, engineers,

DAS

board.

is

of

the

hardware features, typical

description

your

EXF-16

provides information

for

the

setting

must

organized as follows:

up, cabling,

follow the information

be

familiar with

of

the

EXP-16 and

or

EXP-l6/A.

EXP-16

signals

that

and

to

may

arise

on

obtaining

EXP-l6/A.

and

your

with

Appendix B lists

the

Em-I6

Appendix
operation

and

C contains misceltaneous additional

of

the EXP-16 and EXP-l6/A.

the

pin

assignments for the

EXP-l6/A.

main I/O

material

connectors of

on the

vii

Appendix D explains

purposes

An

index

of

software

completes

how

control

this

manual.

to

assign logical

of

your

EXP-16

channel

numbers

or EXF'-16/A.

for

viii

Overview

The

En-

16 is

an

expansion interface board equipped with half-inch

standoffs. The EXP-l6/A

plastic encIosure.

An

Em-16
single signal for amplification and input to one single-ended input
channel
multiplexed signal at switch-selectable gains, and
contains circuitry for filtering, current
detection.
circuit

or

EX€-16/A can multiplex 16 analog input signals into a

of

a data acquisition

The

two EXPs

for

correcting thermocouple readings.

is an expansion interface board mounted in a

also

system.

contain

The

two

EXPs can

measuring,

a

CJC

(cold junction compensation)

amplify

each

of

their

16 inputs

and open-thermocouple

the

Features

Features

This chapter briefly describes the EXP-16
features, applications, and accessories.

Principal features

a

Expands a single-ended analog input channel
system into 16 differential inputs

Works

0

DAS-1200, DAS-1400, and DAS-1600 Series

a

Offers

and T thermocouples

0

Offers

a

Contains terminah

with the Keithley

a

open-thermocouple detection at each

CJC

of

an

Em-16

channel

for a current-measuring resistor at each input

or

EXP-16/A

MetraByte

that

supports the use of

DAS-8,

and

EXP-16/A

are

as

follows:

of

any

data

DAS-800,

boards

type B,

E,

input

and

their

acquisition

DAS-115,

J,

K,

R,

S,

1-1

Connects

provide up

in

a daisy chain

to 128

analog

of

up to eight

input

channels

EXF-16s

or

EXP-l6/As

to

Applications

Typical applications for EXP-16s and

Accessories

Accessories

Contains
switch-seIectable gain settings

Offers filtering at each input

Input channel expansion
Energy management
Signal amplification
Signal conditioning

C-1800

or

an

for

is

a

DAS-800

instrumentation amplifier with a choice

the

EXP-16

cable for connecting

Series board, or

and

EXP-l6/A

to

Em-l6/As

an

EXP-

another

are

as

16

or

EXP-16

of

are

as

follows:

follows:

EXP-l6/A

or

EXP-16/A.

eight

to

a

DAS-8

1-2

S-1600

D

AS

PG-408A

EXP-l6/A

board.

Refer

to

Em-16

is

a cable

-

1 6/ 1

ZOO/

is

Chapter 4 for instructions
or

EXP-l6/A.

for

connecting

1400/ 1600

a

snap-in DC/DC converter

that

is used with a

Series board.

an

EXP-16

or

EXP-l6/A

module

for

an

EX€-16

to

DAS-SA0/16/1200/1400/1600

on

attaching these accessories

a

or

Series

to

an

Overview

2

Functional

This

chapter

EXP-lWA.

describes

Figure

2-1

features

shows

and

the

Description

operating

block

options

diagram.

76543210

of

the

X-

EXP-16

and

Figure

2-1.

Block

Diagram

of

an

EXP-16

and

EXP-16IA

2-1

Input

Circuits

Each input channel
configured as shown

of

an

Em-16 or EXP-lGIA contains circuitry

in

Figure

signal filtering, and terminals

100

Screw

Tenninal

CHAN

for

nHI

-

Input Holes
Channel

Solder

Gap

0

I

T T

Mounting

n

Current

L

Screw

Terminal

CHAN

far

n

LO

Figure

sgzF

2-2.

Input Circuit

2-2

to offer open-thermocouple detection,

for

a current-measuring shunt resistor.

MR

-15

V

CHAN

80

HZ

Filter

for

wv

1

, ,--

111

Im

1

C,l.OpF

Filter

Capacitor

T

1

CHAN

-

for

Each

Analog

Input Channel

n

n

HI

LO

to

to

MUX

r

b

MUX

Open-Thermocouple

Each input circuit uses biasing resistors
detection. Note that the
common-mode voltages on
open-thermocouple detection,
thermocouple by slowly changing the
voltage
can develop a software routine to sense
threshold and flag the open thermocouple. Refer
Open-Thermocouple Detection”
the

2-2

is

much larger than the voltage a thermocouple can produce, you

solder

gaps.

Detection

10

to

enable open-thermocouple

ki2

resistor on

the

thermocoupIe. When you activate

the

biasing resistors respond to

on

input

page

the

low input allows

voltage

any

input

to

3-3

for

instructions

to

-15

voltage above a certain

“Activating

Functional

an

open

V.

As

this

on

bridging

Description

Signal Filtering

The

1.0

pF

filter capacitor and the two
filter for the input signal. If you
particular channel, you can remove the capacitor
that channel.

Current-Measuring Resistor

A

pair

of

mounting holes for a current-measuring

the

screw terminals

to

you

allow

size and power rating for the current
find it more convenient to place the resistor across the channel screw
terminals rather than in the mounting holes.

to solder

the

Multiplexer

An

Em-16

analog

be

to
TTL/CMOS-compatible address on the differential-channel-select lines,
shown
channel

or

input

sampled

in

Figure

1,2h

EXP-I6/A

channels

for

multiplexing

2-1.

selects channel

need

faster settling response for a

for

each channel. The holes

resistor into place.

you

multiplexes signals

into

one signal for the

is

selected

An address

of

Oh selects channel

2,

and

so

1

kn

resistors make

You

must determine the resistor

want

to

from

analog

by

a 4-bit

on.

up

an 80

to

disable the filter

resistor

are

measure.

is

located next

plated-through to

You

may also

the 16 differential

output.

Each channel

0,

lh

selects

Hz

for

Multiplexer

When

you

use

an EXP-16

con&ol the address
outputs are activated

and

guide
Refer to Appendix D for information

channels for software control.

Appendix C

with

or EXl-lG/A with a DAS-8 Series

by

for

DAS-8

DAS-8

digital

CALL

more information).

board,

outputs OP1
Mode 14 (see the DAS-8 user’s

on

the

numbering

to

OP4.

The

of

expansion

DAS-8

you

2-3

Instrumentation

The

multiplexer output feeds to
switch-selectable
also set the amplifier for other gains by installing a gain-adjustment

resistor

a high-performance device suitable for use with strain gauges and other
low-level transducers.

Amplifier

gains

of

(see

“Setting Gain” on page

0.5,

an

instrumentation amplifier with

1,

2,

10,

50,

100,

200, and

3-3).

The instrumentation amplifier

1000.

You

can

is

CJC

Circuit

Power

An

EXP-16

compensation circuitry that delivers

latter value corresponds

You

can connect the
output
circuit can support a data acquisition
measurements with types

If

you

An

EXP-

the

+5

converter module. The accessory
up the
Up Power” on page
or

EXP-l6/A.

or

EXP-l6/A

lines

using jumper

plan

to

use the

16 or

EXP-

V

alone from

+5

V

according to the

includes cold-junction sensing and

to

10 bits/”C with most 12-bit

CJC

output voltage

J3

(refer

to

B,

E,

J,

K,

CJC

circuit, refer

16/A

uses the

the

computer with the optional

+5

also

type

of

3-7

for information

0.0

V

at 0°C

and

24.4

mV/”C.

A/D

converters.

to

any

of the EXP-16 Series

Figure 2-1 on page

system

R,

has

DAS

performing temperature

S,

and

T

thermocouples.

to

the

cautionary note

V

and

+12

V

jumper arrangements for setting

board used. Refer

on

setting up power to

2-1).

from

the computer

PG-4OSA

The CJC

on

DC/DC

to

an

The

page

3-5.

“Setting

EXP-16

or

2-4

Functional

Description

Setup

Unwrapping

This chapter describes setup options for
this chapter before you attempt to install

and

After you remove the wrapped board from its outer shipping carton,
proceed as follows:

1.

2.

Inspecting Your

Your

Em-16

wrapper that must not be removed until you have discharged any
static electricity by either

-

If

you are equipped with a grounded wrist strap, you discharge

static electricity as soon as you hold the wrapped

-

If you are not equipped with a grounded wrist strap, discharge

static electricity by holding the wrapped
placing
chassis (your computer must be turned

Carefully unwrap your
(You may wish

or

EXF’-16/A

your

other hand firmly

EXP

to

store

is packaged at

of

the following methods:

from

the

wrapping material for future

the

Em-16

and

use your

and

EX€-lG/A.

Em.

Board

the

factory

EXP

on

a metal portion

off

its anti-static wrapping material.

in

an

anti-static

Em.

in one hand while

of

the computer

but grounded).

use.)

Read

3.

Inspect the board for signs
to return the board to

6-4).

4.

Check
to be sure
immediately.

5.

When
and hardware setup instructions.

Unwrapping and Inspecting

the

you

Your

of

damage.

the

factory

remaining contents
your

order is complete. Report any missing items,

are satisfied with the inspection, proceed with the software

Board

of

If

damage is apparent,

(see

“Technical Support”

your package against the packing list

arrange

on

page

3-1

Locating

components

Figure

EXP-16

3-

I

and

and

EXP-I6/A.

OUTPLT

mJ4

01

234587X

CJCwJ3

IR

Fl-

Figure

Figure

3-1.

3-2

show

the

Locations

locations

of

EXP-16

for

key

components

-

rE---fR0

piiiiiil

Key

Components

!

Gain

Switch

of

USER

the

3-2

1

52

dai

Switch

I

Figure

3-2.

Locations

of

EXP-16/A

Key

n

~~

Components

Setup

Act

i

va

t

i

n

g

0

pen

To

activate the open-thermocouple detection circuit

must bridge

EXP-16

solder gaps for the

the

screw terminals.

-T

her

m

o

co

u

p

I

e

Detect

the

two

solder gaps for that channel.

are

located under the board, beneath the screw terminals;

EXP-l6/A

are located on top

i o n

for

The

solder gaps for

of

the board, in front

a channel,

you

the

the

of

Setting

Caution:

soldering iron that

develops no more

To

avoid damaging the printed circuitry and components, use a

is

isolated,

than

40

grounded, operates on

W.

Gain

You

control gain on an

or

by

installing a resistor

configures the entire board for the selected gain.

The

gain switch is an 8-position

of

0.5,

1,2,

10,50,

as shown in Figure

ON

Em-16 orEXP-lG/A

in

special mounting holes.

DIP

100,200,

3-3.

and

1000.

t

I

12345678

q-N

0

less

either with the gain switch

Either

switch that

Positions

~0000

“Z88

offers settings

of

the switch are labeled

than

method

7

40

V,

for

and

gains

Figure

Activating Open-Thermocouple Detection

3-3.

Gain

Switch

(set for gain of

50)

3-3

In

applications calling
offerings, you
appropriate value

RU1

(on the

appropriate resistance value:

may

EXP-l6/A).

for

a gain other than the switch-selectable

set a gain of

on

the board space labeled

Use the folIowing calculation

your

choosing

USER

by

inserting a resistor of

(on

the

Em-16)

to

determine the

or

Resistance

The largest differential analog input
choosing a value of gain, or the output of

mix

you can
they all use

gains,

3-1

lists recommended gains for different thermocouple

Table

thermocouples

the

same

use a separate

3-1.

Recommended Gains

Thermocouple Maximum Maximum Suitable

I

J

(ohms)

of

gain.

For

Em-16

I

I

=

200,000

must

different types on one board so long as
mixed thermocouples requiring different

or

EX€-16/A

Output

43mV

/ (desired gain)

always be considered when

the

amplifier may saturate. Also

for each different gain. Table

for

Thermocouple Types

I

"C

I

760

I

I

types.

Gain

100

I

I

3-4

T

Note: Higher gains can be used for less than a full-scale span. Gains

based on a

45

V

output.

21

mV

400

200

are

Setup

Setting

the

Output Jumpers

The

Em-16

the selection of a
channel. The nine jumper positions include eight channel positions,
marked

positions

board (such as the

each jumper block.

and

0

to

7,

connect through external cabling to the inputs

EXP-16IA

CJC

and a blank position, marked

DAS-8).

contain two 9-position jumper blocks:

channel and J4 for the selection

The following subsections describe the use of

of

an

X.

The eight channel

of

an

J3

for

analog output

%channel

Selecting

Selecting

a

CJC Channel

If

CJC

is

required for a particular

of

J3

corresponding pins
choose for
output.

If

no cold-junction compensation is required, place the CJC jumper in

position

Caution:

the screw terminals, you
to place an

a

DAS

The eight jumper-selectable outputs of

to

you

(such

CJC

X

of

To ensure

EXP-

Board

connect

as

a

DAS-8

must

J3.

16

Channel

up

to eight
Series board) without the need for special cables.

for

be

different from

a

uniform

are

in

a covered enclosure.

of

DAS

board channel, jumper the

that channel. The

the

temperature between the CJC sensor and

advised to

these accessories to an 8-channel

use

an

DAS

board channel

channel you choose

an

EXF-l6/A with a cover or

ED-16

or

EXP-lGIA

DAS

for

allow

you

analog

board

Setting

the

Output

Note:

using

degraded.

Jumpers

You

for CJC, or the performance

cannot

use

the

same

channel for

of

your

analog

system will be seriously

output that you are

3-5

In

a

given system, each

of

a

3-2

details

board.

DAS

matches

channel
EXP-l6/A

Table

Series

Em-

16

or

EXP-l6/A

board.

channel selection configurations

the

Make

selected

sure

input

the

channel of

connects to a separate input

jumper

on

J4

the

for

of each

attached

an

attached

EXP-16

DAS

board.

DAS-8

or

Output Jumper

Location

I

I
I
I

As

Table 3-2 shows, the output channel

matches

Note:

board, you are advised to refer
board

Before connecting

user’s

the

1

3

5

7

input

channel of the

guide.

DAS

Channel Number

I

I
I
I

an

Em-16

to

Board

1

3

5

7

DAS

or

the

Call

Input Connector

Pin

Number

I

I

of

the

EXP-16

board.

EXE-l6/A

Mode descriptions in the

to

a

36

34

32

30

or

EXP-l6/A

DAS-8

JllJ2

I

I
I
I

Series

DAS

3-6

Setup

Setting

Up

Power

Using

Using

The following subsections describe the setup
arrangements

+5

V

and

To

perform

1.

2.

3.

4.

External

To

perform

for

theEXP-16

f12

V

External Supplies

use external

the

Set switch
Connect

EXP-16IA

Connect
maximum) to pin

Connect all power supply returns

EXP-16IA main

+5

V

use

an

the

+5

V

and

following procedure:

S

1

to EXT.

i-5

V

(30 mA

main

110

+12

V

(10

20

110

Only

external

+5

V

following procedure:

and

f12

V

supplies with the EXP-16

maximum)

connector.

mA maximum) to

of

the EXP-16

connector.

supply only with the EXP-16 and EXP-IG/A,

EXP-l6/A.

to

pin 29 of

pin

or

EXP-16IA main

to

pin

of

available power supply

and

EXP-l6/A,

the

EXP-16

1

and

-12

V

(10

1/0

11

of the EXP-16

or

or

mA

connector.

1.

Install a PG408A

PG-408A

2.

Set switch

3.

Connect the

EXP-l6/A

4.

Connect

1/0

connector.

Installing a PG-408A

The

PG-408A

pins protruding

space

on the EX€-16

Setting

Up

Figure

Power

3-2.

DC/DC

DC/DC Converter”

S

1

to

INT

@C/DC

+5

V

(250

main

I/O

connector.

th~

+5

V

return to pin 11

DC/DC

DC/DC

Converter

converter module

from

its bottom surface. The socket for this package is a
or

EXP-l6/A

converter module (refer to “Installing a

on

page

3-7).

on

some

boards).

mA

maximum)

marked

of

to pin

29

of

the

EX€-16

is

an

ecapsulated package

as

shown

or

in

the

ED-16

EXP-IG/A main

Figure

3-1

or

with

and

3-7

Pin 1 on the
module

of

the

when snapping the module onto the

shows

PG-408A

or a beveled corner

PG-408A

a diagram

with pin

of

the

is

indicated either by a beveled comer on the

on

the module label. Be

1

of

the socket (pin

pin 1 location.

EX€-16

sure

to

match pin

1 is

marked on the board)

or

EXP-16/A.

Figure

01

LJ

0 0

0

Board

socket

1

3-4

0

0

Setting

Setting

the

the

Figure

+5

V

Jumper

An Em-16 and

C-1800

an

S-1600

board. The

20

pin
how

Jumper

When an EXP-16
boards, you need no jumper

29

pin
plated-through holes labeled
Figure
must solder a
(also shown in Figure

3-4.

cable when connected to a DAS-S/SOO Series board or by way

cable when connected

+5

V

by way of a

to

set the EXP-16

for

an

EXP-16

is

hard-wired (on

3-1).

When

wire

0

0

0

Locating Pin 1 on

EXP-IGIA

power

C-1800

is

connected

receive

from

cable. The following two subsections explain

or

EXP-16IA jumpers for these situations,

for

the

EXP-16, see the trace between the

A

an

EXP-16

between the plated-through holes labeled B and

the

PG-408A

+5

V

power on pin

to a DAS-16/1600/1400/1200 Series

a

DASCON-1 board, however, arrives on

to

DAS-8/800/1200/1600/1400 Series

the

+5

V because the

and

+5

V,

which are

is

connected to a

and

Board

29

by way

+5

V

connection to

shown

shown in

DASCON-1

3-1).

0

0

0

Socket

board,

of

you

+5

a

of

V

Setup

Setting the

Jumper for

an

EXP-l6/A

(Jumper

J9)

Power

Notes

When
board, the jumper at

be on

When

EXT.

the

+5

the computer power supply.

input common-mode range

an

EXP-l6/A

(the factory default position,

an

EXP-16/A

the

two

used with a DAS-8 board,

and

f12 V power through the

If

a

PG-408A

S

1

to

INT (or

Note that the computer
(or

DC/DC)

i-5

V and

Also

note that the computer

switch

V

supply.

10

S1

mode,

mA

to

INT;

is

connected

J9

must

is connected to a
pins closest to switch

module

DC/DC).

is

installed

If

a

I/O

an

EXF-16

In

the

EXT

from

the

f12

the

f12

V

to

a DAS-8/800/1200/1600/1400

be

on

the

two pins

as

shown

DASCON-1

C-1800

PG-408A

bus has a limited output capability.

or

mode, the board draws up to

V

bus

of

f10

computer supply

in

S

1.

an

EXF-16

cable that connects

on

the

EXP-16

is

not installed,

EXP-l6/A

supplies. Be sure

supplies are

V,

you must install

farthest

Figure

board,

or

EXP-l6/A

draws up to

f12

is

inadequate for

3-2

on

page

the

jumper

or

EXP-l6/A,

set

you

do not overIoad

V.

If

you plan

a

from switch S 1

receives

the

switch

250

30

mA from

PG-408A

Series

3-2).

When

at

J9

must

+5

V

two boards.

set

switch

S 1 to

In

the

INT

mA

from

the

to

use

an

and

set

this

range.

Setting

Up

Power

3-9

Wiring

and Cabling

Using

the

This chapter describes
EXF-16s

Main

The

connectors:

board

Em-16

labeled

or

EXP-l6/As

I/O

Connectors

Em-16

J1

and

the

or

EXP-l6/A. The

J1

and

and EXP-l6/A

and

other

J2.

the

I/O

connectors

to

DAS boards and

contain

52.

Use either connector

for connection to

two

connectors

Figure

4-1

shows

LLGND-18
LLGND-17
LLGND-16
LLGND-I5
LLGND-14
LL GND; 13
LLGND-12

DCOM

19

-

11

A3-10

A2

-09

A1

-08

A0

-

07
06
05

04

03

02

+Vs-Ol

and

the

cabling

accessories.

or

two, parallel-wired main

for

an

STA-XX

are

37-pin,

the

pin assignments

connection

or

to

an

additional

D-type and are

for

wiring

1/0

a

DAS

J1

and

of

J2.

Using

the

Main

Figure

110

Connectors

4-1.

Pin Assignments

of

Main

UO

Connectors

J1

and

52

4-1

Connecting

Multiple

Use

C-1800

EXP-l6/As

system of up
or

up

to

compensation).

You

must select a different output channel on each

in a daisy

DAS

a

board input channel.

EXP-16s

cables to connect a daisy chain

with a

DAS

to

128

channels for standard voltage or current measurement

112

channels for thermocouple measurement (with cold-junction

chain. Set each board

or

EXP-I6/As

board. A daisy chain allows development of a

for

an

output channel that corresponds to

of

up to eight

EXP-16

EXP-16s

or

EXF'-16/A

or

Using

Series

Direct connection is also possible between an

an

the
seven single-ended inputs remaining, depending on whether cold-junction
compensation is used.
several

The folIowing subsections give specifics

or

EXP-16s

Boards

STA-XX

16

Figure

EXP-lG/As

or

screw terminal accessory. The

differential inputs of

EXP-

16s

4-2.

Daisy Chain

to various

EXP-I6/As

Figure

or

EXP- 16/As,

or

EXP-16

and an

EXP-1M

with

ED-16

STA-XX

an

EXP-16

4-2

of

a

STA-XX

DAS

boards.

outpot

Channel

or

EXP-16/A

illustrates a daisy chain

and

an

STA-XX.

1

EXP-16

or

EXP-lWA

DAS

Board

(all cables

with

EXP-16

are

C-1800)

on

connecting multiple

DAS-16/1600/1400/1200

or

EXP-l6/A

can accommodate

and

still have

of

a DAS board,

or

and

six

STA-XX

EXP-lG/A

ED-16s

or

4-2

You

can add up to eight

of

a

DAS-16/1600/1400/1200

Digital

outputs

EXE-16

it exercises the digital outputs

OPO

or

EXa-16/A.

EXP-16

to

OP3

drive the multiplexer address Iines

Check your application

or

EXP-l6/As

Series

while

board

to

gain up

software

performing

to

A/D

the

analog

conversions.

input

to

128

channels.

of

to

determine how

Wiring

and

section

the

Cabling

Use

an

S-1600 adapter cable to connect the first

the DAS-16/1600/1400/1200 Series board. Use

or

more EXP-lGs

EXP-lG/As. Refer to Figure 4-3

3-foot S-1600 cable.

EXP-16

C-I800

for

a

or EXP-I6/A

cables to add

diagram

of

to

the

Connecting

Multiple

Figure

When connecting EXP-16
Series

boards,
set switch
should

be

as shown in Figure
additional

you

S1

to

INT

on

the

two

EXF-16s

must use

or

DC/DC.

pins farthest

3-2.

Figure 4-4 is a diagram showing the

or

EXP-lG/As.

DAS-16/1600/1400/X200

Figure 4-4.

EXP-I

with

6s

A

Daisy Chain

an

STA-XX

or

EXP-1

and

6/As

4-3. S-1600

or

EXP-l6/As to

the

optional PG-408A DCDC converters

On

Series

boards

of

a

up

to

Cabte

Wiring

the

DAS-l6/1600/1400/1200

the EXP-l6/A, the

from

switch

You

S

must set

I.

(in

the

jumper

its

default

for single-ended

DAS-16/1600/1400/1200 Series

Eight EXP-16s

or

EXP-l6/As

use

inputs.

and

at

J9

position),

of

board

4-3

Note that in Figure 4-4,

be

wired to the

STA-XX.

the

analog outputs of additional

DAS

boards can

Using

Board

When you connect

DAS-16/1600/1400/1200

Em-16

EXP-16

However, you can partition
inputs (that are sampled directly
indirect inputs (sampled through the

EXP-l6/A

such

All

and each
different gain.
different channel functions,
differential).

EXP-16s

You

inputs of a
multiplexes

DAS-XPGNpCDAS-XPGA

for a total of
are set

or

scan

an

EXP-16

channels in the fast
multiplexer address lines through the

is best suited to handling high-gain, low-rate-of-change inputs

as

thermocouples, pressure transducers, and

analog

or

5,

input channel connections are made

EXP-16

EXP-l6/As

can add

DAS-XPGA/pCDAS-8PGA. An

by

digital outputs

increments the multiplexer address with Mode 14,
of

Mode

or

EXP-l6/A

In

this way, a system can be configured with a variety of

with

EXP-

16s

or

16

inputs into a single output channel. Therefore, a single

128

input channels.

4

or

5 on the next set

or

EXP-lG/A

Series board, you cannot sample the added

DMA

sampling mode because you drive the

your

channels into some high-speed direct

by

the

EXP-

(group

gains,

and input modes (single-ended and

a

DAS-8PGAlpCDAS-8PGA

EXP-l6/As

supports

OF1

to

The

OP4,

of

to any

up

Em-16

to

a

digital

DAS

board) and some low-speed

16

or

Em-

through

of

16

channels) can operate at a

or

dl

EXP-16

to

eight

EXP-16s

multiplexer address lines

so

that a typical scan uses Mode

multiplexer channels, and

output

16/A).

so

on.

of

the eight

or

port.

screw connectors,

EXP-l6/A

or

and

repeats the

The

EXP-

16

analog

EXP-l6/As

4

so

on.

4-4

When

using

the

DAS-SPGA/pCDAS-SPGA

EXP-l6/As,

inputs

necessitated by the wiring configuration of the

addition, you must
correspond to

or

EXP-

jumper at

default position), as shown in Figure

using

16/A

J9

you

must configure channels

switch

must

S2

(on

the

DAS

board); this requirement is

also

set the

the

analog output and CJC jumper settings

for single-ended configuration. On the

be

on the two

DAS-XPGA/pCDAS-SPGA

pins

farthest

3-2.

with EXP-16s

1,2,3,

and

EXP-16

from

or

5

as

single-ended

or

EXP-l6/A.

channels that

of

each

EXP-

EXP-l6/A,

switch

Wiring and Cabling

S

1

(in its

the

In

16

An

Em-16 or EXP-l6/A
connectors similar
cable should be provided for each EXP-16
channel connections are made through screw terminals, and each EXP- 16
or

EXP-lG/A (group

this way, a system can be configured with a variety of different channel
functions, gains, and input modes (single-ended and differential).

Use

a C-1800 cable for connecting aDAS board to
EXP-16IA and
The EXP-16s
measured are near f10

to

for

connecting a daisy chain

or

EXP-l6/As do not require a PG408A unless signals to be

is

designed to connect with flat cable and

those used for the DAS-8PGA/pCDAS-8PGA. One

or EXP-I6/A. All analog input

of

16

channels) can operate at a different gain. In

an

V.

EX€-16

of

EXP-16s or EXP-16/As.

or

Using

Using

EXP-16s

Use

DAS-8AO/LT Series board. These DAS boards
connected EXF-16
converter module and that switch
EXP-l6/A, the jumper at
S1 (in

EXP-16s

Use only
DASCON-1 board. You should be aware, however, that
can properly connect only the first three channels
the
the input channels to

The DASCON-1 requires
used with a PG408A

or

To

follows:

and

EXP-I6/As

a

C-1800 cable to connect

or

EXP-16/A to be used with a PG408A

its

default position), as shown in Figure

and

EXP-I6/As

a

C-1800

EXP-16s

cable to connect an EXF-16

or

EXP-16/As and that you should connect

analog

DC/'DC converter and

DCDC.

use

a

DASCON-1 with

with

J9

DAS-8AO/LT

an

ED-I6

S

1

be set for JNT

must

be

on the two

or

EXP-I6/A

also

pins

Boards

to a

require each

DCDC

or

DCDC.

farthest

from

3-2.

with

a

DASCON-1

Board

or

EXF-16IA

of

the DASCON-1 and

to

a

C-1800 cable

the

low side

ground.

each

connected EXP-16

that

an

EXP-16, you must modify the EXP-16 as

or

EXP-lWA to be

switch S 1 be set

On

a

for

an

switch

of

INT

Connecting

Multiple

1.

Cut the etch between the point

+5

marked

2.

Add a jumper between the point marked B and the

EXP-16s

V.

or

EXP-16iAs

on

the board marked A and the point

point

marked

+5

V.

4-5

To use

the two

a

DASCON-1

pins

closest

with an

to

switch

EXP-l6/A,

S1.

you must place the

J9

jumper on

Avoiding Ground

An

EXP-16 or

input. While differential inputs are better
many applications, they require more
ground loops
offered

to

If you

is

already grounded,

&L

GND)

correct connections for

Loops

EXP-l6/A

and

other undesirable effects. The following rules are

help you avoid

are

driving

to

Figure

an

its channel’s low

4-5.

Connecting a Grounded Signal

provides

the

EX€-16

do

not connect the

16

pitfalls

or

input

a

grounded

channels of differential

than

single-ended

care

in their configuration

of

configuring

EXP-l6/A

EXP‘s

(LO).

these

horn

a signal source that

low-level

Figure

4-5

source.

Source

analog

inputs

to

for

avoid

inputs:

ground

illustrates the

to

LL

GND

at

he

4-6

If

you are connecting

source (such

must be connected

at

wire

as

a

thermocouple), the low-level ground

to

the

appropriate screw terminals. Figure

correct connections for

+

Signal

Source

,-

Es

Figure

4-6.

Connecting a Floating Signal Source

an

Em-16

or

EXP-

I.

6/A

the channel’s low input

a floating source.

to a floating

(LL

GND)

by

instdling a jumper

4-6

illustrates the

Wiring

and

signal

Cabting

Cali

bration

Equipment

This chapter describes calibration requirements for

EXP-lG/A.

Each

EXP-16

adjustment prior to installation. However, periodic calibration may be

required to compensate for component aging, environmental changes, and

so

on.

The

can be one year or more.
the calibration period can

Req

u

You

must have

EXP-

16JA

A

4

A

voltage calibrator (or a stable noise-free

be

used with the digital voltmeter)

If

the

or other temperature-measuring device accurate to

and

EXF'-16/A

calibration

period

is factory cdibrated; it requires no further

in

a

clean, temperature-stable environment

In a dusty or varying-temperature environment,

be

as littIe

as

three

irernents

the

following equipment

1/2

digit digital voltmeter

CJC

circuitry is to be calibrated, you need a digital thermometer

to

calibrate

your

months.

an

DC

voltage source

Em-

EXP-16

+2O

C

16

or

or

that

can

Equipment Requirements

5-

1

Instrumentation

To

calibrate the instrumentation amplifier of

perform

1.

Connect power to the EXP-16 Series board (refer to “Setting the

Output Jumpers” on page

Wire

2.

GND terminal to

Amplifier

the

following steps:

the

CH15

HI

short

Calibration

3-5

for

instructions).

terminal

to

the

CH15

them together.

your

Em-16

LO

terminal and to the

or

ED-

16/A,

LL

Select channel 15 either

3.

to

+5

V

or,

if connected to a DAS

outputs high with your application software.

Connect the digital multimeter

4.

pins

on

the

upper side

shown in Figure

Set the gain switch to

5.

6.

Adjust the zero

the

multimeter reads 0 VDC.

7.

Set the

8.

Adjust the

until the multimeter reads

9.

One

step 2 of this procedure; select a channel using the channel-select bits,

and make sure the channel is at

10.

Set the gain switch

11.

Connect the positive terminal

and

Set

12.
V;

to

gain

at

a time, connect each

the

negative terminal to CH15

the

input voltage

for example,

5

V I 10

5-1

in

switch

zero

out potentiometer

if

=

0.5

V.

by

tying

of

the

output channel jumper connector

and

Figure

1000.

potentiometer

to

0.5.

0

VDC.

of

the

to

the desired value.

of

so

that

the

you

are

to

run

the channel-select pins (pins 7 to

board,

by

setting all

from

LL

GND

to one

5-2,

below.

(Em-16:

(Em-16:

other input channels

0

VDC

the voItage calibrator to

LO

input voltage times

at

a

R75;

fl

mV.

and to LL

gain

of

EXl-16A:

R76; EXP-16A:

10,

four

of

the

R49)

(0

to

CH15

GND.

the

gain equals

set the input voltage

digital

jumper

(541,

until

R34)

14)

as

HI

10)

as

in

+5

5-2

Adjust the

13.

+5.000

+1

gain

potentiometer (EXP-16: R74; EXP-16A:

mV

output reading.

R50)

Cali

for a

brat

ion

J2

r-----_l

1

PG408A

1

(if

L-----,

used)

I

I

&in

Switch

Figure

Figure

5-1.

5-2.

Locations

Locations

of

EXP-16

of

EXP-lG/A

Calibration Components

Calibration Components

Instrumentation

Amplifier

Calibration

5-3

CJC

Circuit Calibration

1.

Connect the multimeter

the upper side

2.

Monitor

the

temperature in the vicinity

from

LL

GND to one

of

the output channel jumper (33).

of

of

the jumper

CR2,

the CJC sensor.

pins

on

3. Adjust the
obtain a multimeter reading
digital thermometer reads 17.0
until the multimeter reads

CJC

ADJ

potentiometer (Em-16: R77; Em-16A: R33) to

of 24.4

"C,

0.0244

mV

per "C; for example, if

adjust

the

CJC

x

17.0

or

0.4148

the

ADJ potentiometer

V).

5-4

Calibration

This

chapter guides you

an

using

EXP-16

Troubles

in

resolving problems

or

EXP-l6/A.

hooting

with

measurement systems

Problem

Is0

lation

If you suspect a problem with faulty hardware

try

to

isolate

the

problem

the

components

EXP-l6/A.

I

;

HOSTPC

Figure

Measurement systems that use
configuration
isolation
you

procedure

can

use to isolate a system problem

in

6-1.

and

complexity,

to a major

a simple measurement system using

EXP-16

that applies to

or

EXP-lG/A

the

EXP-16

so

it

all

or

with

cabling

system component. Figure

an

Em-16

EXP-16

or

0

EXP-IWA

is

not

systems.

System

or

possible

are

as

Components

EXP-l6/A

to

Two

follows:

vary

provide one problem

general techniques

and

6-1

in

wiring,

shows

or

Remove a suspected component

separately.

from

the

system and test

it

6-1

An

example

Em-16

connector
example
conductors

or

is

of

this

kind

of

test

is

checking the

EXP-l6/A

and

observing the outputs at the output connector. Another

using

.

by applying known input signals at

an

ohmmeter to test the continuity

signal

of

path through

the

wiring

input

or

cable

an

Common

~

Symptom

Replace a suspected component
you have another

DAS

board

works,

then

Problems

Table

6-1

measurement systems using the
solve

the

6-4.

Table

6-1. Problems

I

Possible

and

lists symptoms and suggested solutions for problems with

problem with

DAS

in

a malfunctioning system.

you have isolated

Solutions

this

Cause

with

one that

board that is functional,

the

problem to

EXP-16

table,

refer

and Suggested Solutions

or

to

“Technical

~ Suggestions

works.

use

If

the malfunctioning system

the

original DAS board.

EXP-lWA.

Support”

For example, if

it

to

replace the

If

you

cannot

on

page

I

6-2

Troubleshooting

Table

6-1.

Problems

and

Suggested

Solutions

(cont.)

Symptom

Mermittent operation

Possible

Vibrations or loose connections

Overheating

Electrical

Inadequate power

Cause

noise

Suggestions

Cushion source

tighten

connections.

Check for

and

try

to position the

EXP-lG/A

Make sure
correct cable to connect the
board

to

EXP-l6/A. Make
cover

is

installed. Re-route
cable away
emissions,
monitors.

Make sue

rating

is

current demand. Make sure the
wires

or

Refer

to

of

vibration and

external

away from them.

you

the

are

EXP-16

heat sources

EXP-16

using

or

sure

from

likely sources

such

as video

the power supply

sufficient

cable

Chapter

to handle the

are

not

too

4.

the

the

DAS

PC

the

long.

or

of

[nvalid data

Bad input connections

EIectrical noise

Check cabling or wiring

sensors

inputs.

Use shielded input

sure

Re-route the
likely sources

as

to

EXF-16

the

PC

cover is installed.

wiring

of

video monitors.

or

EXP-l6/A

wiring.

away

emissions, such

from

Make

from

6-3

j

Symptom

Table

6-1,

Problems and Suggested Solutions

I

Possible

Cause

I

Suggestions

(cont.)

I

Technical

6-4

Support

Troubleshooting

An

applications engineer will help

board problem over the teiephone.

following information:

you

try

To

save time,

to

diagnose

be

md

ready

resolve

to

furnish

your

the

EXP-16

or

EXP-l6/A

configuration

DAS

board

configuration

Computer

Operating System

Model

Serial

#

Revision

Number

Number

Model

Serial

Revision
Base address

Interrupt

Number

Input

Mode

DMA

Manufacturer

CPU

Clock

KB

Video

BIOS
DOS

Windows

Windows

code

of

of

#

code

level

of

(S.E.

(uni.

channel(s)

type

speed

of

RAM

system

type

version

version

mode

channels

Ew-16~.

setting

setting

channels

or

Diff.)

or

bip.)

(MHz)

Software package

Compiler
(if applicable)

Accessories

Name

Serial

#

Version

Invoice/Order

Language
Manufacturer

Version

#

6-5

If

a

teiephone resolution is not possible,
issue you a Return
return the equipment.
documentation regarding

Material Authorization

Please

reference the

the

equipment and on the outside of

shipping container.

When

returning equipment

for

information:

Your

name,

A

description

The

RMA

address,

of

the

and

problem

number on the

telephone number.

outside ofthe package.

repair,

please include the following

or

its symptoms.

the

applications engineer

@MA)

RMA

number and

number in

any

the

ask

will

you to

Note:

you

Repackage

If

you

are

submitting

must hish the invoice number

the

equipment. Use its original anti-static wrapping, if

possible.

your

equipment

and

date

for

repair

of

purchase.

under

warranty,

6-6

Troubleshooting

The

following

Specifications

tables contain specifications

for

EXP-16

and

EXP-I

A

6/A.

1

Feature

1

Temperature

1

Common

I

Analog

output

Table

Feature

1

Output

coefficient

mode

range

current

A-2.

at

Table

0.0

A-I.

Analog Data

I

Specification

1

5

ppm

typical;

1

k1O

V

maximum

I

20

mA

maximum

Cold-Junction Compensation

I

Specification

c

I

0.0

v

15

ppm

maximum

1

I
1

I
I

I

A-1

Table

A-3.

Gain

Relationships

Gain

1

100

1

Notes

I

Settling

standard

I

Feature

1

+12

Maximum

input Offset

Voltage

1

times were obtained without

input

V

current

Drift

2pV/T

filter

Table

Common instrumentation

Mode

Rejection Nonlinearity 1 Settling Time'

I

125dB

(two

1

kn

resistors

A-4.

I

Specification

1

8

mA

typical;

Amplifier

1

0.005

0.015

an

input

filter.

and

a

1

pF

Power Requirements

I0

mA

maximum

I

Settling

capacitor)

(without

times

are

15

ps

12

ps

obtained with

greater.

I

PG-408A)

I

A-2

Table

A-5.

]

Feature

j

Storage temperature

Environmental Specifications

I

Specification

1-40

to

100

range

OC

I
I

Specifications

I

Feature

I

Weidt

I

screw

Table

terminal

wire

A-6.

sizes

Physical

I

Specification

I

0.5

I

12

Specifications

lb

to

22

AWG

I
I

A-3

Connector

An

EX€-16

connectors.
connector

is

normally

types

shown

or

EXF-l6/A

While

(Jl)

cabled

of

accessory. Pin assignments

in

Figure

both

is

normally cabIed

to

B-1.

Pin

Assignments

contains two, parallel-wired, 37-pin,

connectors carry the

to

the

an

additional

EXP-16

for

main

DAS

board,

or

EXP-

the main

I/O

I/O

signals,

and

the second

16/A

or

to

connectors

male

the

first

another

are

D

(J2)

Figure

A3-

A2 - 09
A1
A0

+vs

14

-

16

-

12

10

-08

-

07

06

05

04

03

02

-

01

LL GND - 18
LLGND-17
LL GND
LLGND-15
LLGND-14
LL GND-- 13
LL GND

DCOM - 11

B-1.

Pin Assignments for Main

I/O

Connectors

J1

and

52

Operating

This appendix contains miscellaneous additional material on the
operation

of

an

EXP-16

or

EXP-l6/A

with

DAS-8

Notes

Calls.

Input

Channel Selection with

Each channel
TTL/CMOS-compatibIe address on the differential-channel-select lines,
shown in Figure

channel

When

you use
address with the
outputs are activated

for

guide

Upon

execution of

DAS-8

the selected channel. To read other channels, use the Mode
again to select a new input channel.

Input channels

BASICfor..

steps required

A/D

(in

the

DAS-8

set, the
user’s guide for detaiIs.

to

be sampled

2-1.

1,

2h

selects channel

an

EXP-16

DAS-8

a description

the

remain fixed;

of

an

.next

loop.

to

scan

Mode

4),

and

must be ready

DAS-8

binary code

An

address of Oh selects channel 0,

or

digital outputs

by

DAS-8 CALL

of CALL

Mode

any

subsequent

EXP-1.6

The following example shows the programming

the channels

store the data in

to

must

DAS-8

for

multiplexing

2,

and

so

EXP-16/A

modes).

14

CaL, the

or

EXP-l6/A

of

run;

that is, the

be loaded,

Calls

on.

with a

OPl

Mode

DAS-8

can

an

EXP-16

an

may called

and

is

selected by a 4-bit

lh

selects

DAS-8,

to

OP4.

14

(see the

OPO

to

routines are performed

be scanned using a simple

DAS-8

so

you

control the

These

DAS-8

DAS-8

OP3

outputs

or

EXP-lWA,

DIO%.

base address must be

on. Refer to the

14

Note

user’s

of

CALL

read the

the

on

that

DAS-8

Input

Channel

Selection

with

DAS-8

Calls

c-1

XXXlO

xxx2

0

xxx3

0

xxx4

0

xxx5

0

xxx6

0

xxx7

0

xxx8

0

xxx9

0

CALL

FOR

I

MDS

=

CALL

MD%

=

CALL

NEXT

DAS*

DAS8

DAS8

I

(MD%,

=

0

TO

14:

OPZ

(MDC,

4:

(MD%,

The

data

channel

2

channels are
loops.

LT%(O),

15

=

I

OPS,

DIO%(I),

from

channel

in

DI0%(2),

to

be used, they can

FLAG%)

FLAGS)

FLAG%)

0

is

in

and

Array

DIO%,

so

on. If more than

be

scanned simply by nestingfor.

'Sets

'channel.

'This

'to

'channel selected

'EXP-16

'Sets up channel scan

'routine.

'Sets

'channel
'Sets

'Set

'Perform

'Return

DAS-8

must be

the

EXP-16

jumpers.

up

MODE

1.

channel.

MODE

4.

conversion.

to

channel 1 is

one

of

the

input

set

equal

out

by

14,

next

scan.

in

DIO%(I),

DAS-8 input

...

the

next

Software

Support

The outputs
strain-gage bridges
amplification before their application
(analog-to-digitai) inputs (including

for

Low-Level Devices

of

low-level transducers, such

(load

cells,

pressure

the

and

to

the

DAS-8).

as

Em-lG/A incorporates an instrumentation amplifier
amplification

of

thermocouples. The

requirements

and

includes circuitry

Em-16

for

DC output transducers.

or EXP-lG/A can handle most interface

allowing

thermocouples

and

force transducers), require

high

level

of

many

AD

An

EXP-16

that

or

provides stable

cold-junction compensation

c-2

Operating

Notes

Included in

Themolub.

Em-16

intended to interface directly with
linearization routines are adaptable to perform linearization on any set
thermocouple data that
Thermolab programs include the following:

0

ONE-EXP.BAS

with a

ED-16

This diskette contains

or

EXP-l6/A

or

EXP-lG/A

with a

can

-

A

program for using one

DAS-8

software package is a diskette labelled

BASIC

DAS-8.

the

be brought

programs illustrating use

Though this package of programs is

DAS-8,

into

the thermocouple

the

BASIC

ED-

workspace.

16

or

EXP-l6/A

of

an

of

MANY-EXP.BAS

0

EXP-l6/As

EXP-J

0

J.BAS

Before running these routines, copy

Em-I6

from
thermocouple subroutines
your own

to

subroutines are commented

software diskette. You may

your

allow merging for use with different thermocouple types. The

GOSUB’d

look-up array (that may
section of each subroutine performs a linear interpolation.

both fast

thermocouples. To avoid error messages, data should be bounded to
physicafly realizable minimum/rnaximum values before entering the

subroutines.

The examples
for

programming

use

and

with

with a

to

R

to

R.BAS

DOS

diskette to

BASIC

in the initialization section

accurate over

are

a

DAS-8,

your

-

A

program

for

using three

EXP-16s

or

DAS-8

-

Examples

-

programs. Each subroutine has different line numbering

just one way

own applications.

of

using thermocouples

Subroutines for thermocouple linearization

the

EXP-16

are

in

and

require a

DAS-8.ADR

also

wish to copy

software diskette. The

ASCII

consist of a data section that should be

to facilitate merging them into

of

your

few

seconds

and

DAS8.BLN

BASICA.COM

program. This loads a

of

load time). The second

This

the

full

operating temperature range of the

of

programming

but they can serve as a starting point

an

EXP-16

or

EXP-l6/A

for

onto the

method is

Software

Support

for

Low-Level Devices

c-3

Channel

This

appendix describes the assignment
board and all attached
Panel utility.

Numbers for Software

of

EXP-16s

channel numbers

for

use in software such

for

as the

a

DAS

Control

Channel

Numbering

DAS-8/800

0

through

16-channel EXP-16 Series

of

available channels
consecutive
beginning
channels associated

Table

for

Series

7.

If

you

analog

with

D-1

.

DAS-81800

Onboard Channel

I
I

I

8-Channel

boards

require additional channels,

onboard channel

Channels in Maximum

contain

expansion

to

128.

Expansion accessories are assigned

input channels

with

each expansion accessory.

Series

0

2

4

eight

accessories

of

the

0.

Table

I
I

I

DAS

analog

EXP-16

Boards

input channels,

you

can use

to

increase the number

DAS-S/SOO

D-1

lists the software (logical)

EXP-8/800

and

EXP-lfYA

Software (Logical)

Channels

0

to

15

32

to

41

64

to

79

up

Series board,

Configuration

numbered

to

eight

to

I
I

I

Channel

Numbering

for

&Channel

I

DAS

6

Boards

I

96

to

111

I

D-I

Figure
remaining onboard channels on
single-ended mode.
to

D-1

illustrates

the

physical channels on the Em-16

the

use of three EXP-16s or EXP-l6/As

In

software such as the Control

a

DAS-8/800 Series board configured

input channel 0 as logical channels 0 to
EXP-16
channels 16 to
attached to analog input channel
to the remaining 13 onboard
through

or

EXP-16/A

31,

7)

in

software as logical channels

attached

and the physical channels

analog

~

DAS-8/800

Series

Board

to

analog input channel

2

as logical channels

input channels (physical channels

chm

0t015

0-

1-

2

3’

4

5

>channels

6

7-

Panel

or

EXP-l6/A attached to

15,

the physical channels

1

on

the

EXP-16

32

48

through 52.

ne

Is

EXP-16

channels

16

to

31

EXP-16

Onboard

48to52

I,

channels

32

and

utility,

as

logical

or

EXP-l6/A

to

47.

to

47

the five

you

refer

analog

on

You

refer

for

the

3

Figure

You

can

0-1.

perform

multiple channels.

Channel Numbering

DAS-16/1600/1400/1200 Series boards are switch-configurable

16

single-ended analog input channels (numbered
differential analog input channels (numbered
more than the

EXP-16s

256.

D-2

or

EXP-l6/As

Analog Input Channel

an

analog input operation

for

16-Channel

16

single-ended onboard channels, you can use up

to

increase

Numbering

on

a

DAS

0

the

number of

Channel Numbers

for Software Control

single

channel or

Boards

0

through

through

7).

available

on

for

15)

or

If

you require

to

channels

for

Software

either
eight

16

to

EXP-16s

channels, beginning with onboard

(or

or

EXP-l6/As

logical) channels associated

are assigned to

with

consecutive

channel

each

0.

Tabfe

EXP-16

onboard analog input

D-2

lists

the

software

or

EXP-l6/A.

Table

D-2.

Channels in Maximum

Onboard Channel

I

I

I
I

I

I

0

2

4

6

8

10

EXP-16

EXP-16

Software (Logical)

I
I
I

I

I

I

Series Configuration

and

Channels

Oto

32

to

64

to

96

to

128

to

160

to

EXP-16/A

15

47

79

111

143

175

I
I

I

I

I

I

Channel

Numbering

I

I

Figure

remaining onboard channels

configured

utility,

attached

physical

for

D-2

illustrates

for

you

refer

to

analog

channels

16-Channel

12

14

the

use

single-ended mode.

to

?.he

physical channels

input

channel 0

on

the

EXP-16

DAS

Boards

I
I

of

three

Em-16~

on

a

DAS-16/1600/1400/1200

In

software

as

logical channels 0 to

or

EXP-16/A

on

192

224 to

or

such

the

EX€-16

attached

to

207

239

EXF-lG/As

Series board

as

the

Control

or

EXP-l6/A

15,

to

analog input

I

I

and

the

the

13

Panel

D-3

channel 1

EXP-16

channels

as

logical

or

EXP-I6/A

32

to

47.

channels

attached

You

refer

channels (physical channels

60.

EXP-16

channels

010

to

3

16

to

the

to

15

to

31,

and

analog

remaining

15)

in

software

EXP-16

channels

16

to

the

input

31

physical

channel

13

onboard

as

channels

2

as

logical

analog input

logical channels 48 to

on

the

DAS-16/16c10/1400/1200

Series

Board

Figure

D-2.

15

t]

Analog

On

board

channels

Input

Channels

EXP-16

channels

32

to

47

D-4

Channel

Numbers

for

Software

Index

connectors, main
current-measuring resistor

I/O

4-1

2-3

A

accessory

C-1800

PG-408A

PG-408A

S-1600

amplifier, instrumentation
anti-static wrapper
applications engineer
applications
avoiding ground loops

cable

1-2

2-4

DCDC

cable

converter

1-2

2-4

3-1

6-5

for

EXP-16 Series boards

4-6

B

block

diagram

2-1

C

C-1800

calibration requirements
Call
channels, logical
channel-select Lines

CJC

common problems and solutions

component

components, calibration
connecting multipIe
connecting

cable

1-2

5-

1

Mode

3-6

D-3

2-3

circuit

2-4

locations

3-2

5-3

boards

to

DAS-

16/l600/1400

DAS-sAOLT

DAS-gPGA/PCDAS-8PGA

DASCON-

STA-XX

Boards

1

Board

accessory

4-2

Series

4-5

4-5

4-2

boards

1-2

6-2

4-4

1-2

4-3

D

daisy chain

da5-8

DCDC

detection, open-thennocouple

diagram,

of

EXP-16

CALL

modes

converter

block

2-1

3-7

Series

C-

1

E

equipment, calibration
expansion accessories

external

power supplies,

5-1

D-1

using

F

factory calibration
features
filter, input signal

of

EXP-16

note

5-1

Series boards

2-3

G

gain

amplifier

for

resistor

setting

ground

grounded

2-4

thermocouple

type

3-4

3-3

loops, avoiding

wrist

strap

3-1

3-4

4-6

boards

2-2

3-7

1-1

4-2

x-1

I

R

input channel selection
instrumentation amplifier
instrumentation amplifier, calibration 5-2

C-

1

2-4

J

J9

jumper

jumper blocks,

(EXP-16A

9-pin

only)

3-5

3-9

L

logical channels

D-3

M

multiplexer 2-3

resistor

current-measuring
gain-adjustment 2-4,3-4

RMA

number

6-6

5

5-1600

selecting

setting

software

STA-XX

switch, gain

cable 1-2,4-3

CJC

channel

CJC output channel

DAS

board channel

J9

jumper position

3-5

4-6

switch

S1

support

accessory

3-7, 4-3,

C-2

4-2

3-3

2-3

3-5

3-5

3-9,4-3,4-4,4-5,

4-5

0

open-thermocouple detection

activation
circuit description 2-2

output

jumper

3-3

settings

3-5

P

PG-408A

accessory
instaIlation
module

pin assignments, main
problem

programming example

x-2

1-2

2-4

isolation

3-7

6-

1

I/O

C-

1

connectors B-

1

T

technical support, obtaining
thermocouple linearization routines
thermocouple types
Thermolab diskette

2-4

C-3

6-4

U

using

an

S-1600

cable

4-3

W

wrapper, anti-static

3-

1

C-3

Index

Specifications are subject to change without notice.
All Keithley trademarks and trade names are the property of Keithley Instruments, Inc. All other trademarks and

trade names are the property of their respective companies.

Keithley Instruments, Inc. 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: [phone]

1-888-KEITHLEY (534-8453) • www.keithley.com

Sales Offices: BELGIUM: Bergensesteenweg 709 • B-1600 Sint-Pieters-Leeuw • 02-363 00 40 • Fax: [phone]

CHINA:

Yuan Chen Xin Building, Room 705 • 12 Yumin Road, Dewai, Madian • Beijing 100029 • 8610-6202-2886 • Fax: [phone]

FINLAND: Tietäjäntie 2 • 02130 Espoo • Phone: [phone] • Fax: [phone]
FRANCE: 3, allée des Garays • 91127 Palaiseau Cédex • 01-64 53 20 20 • Fax: [phone]
GERMANY: Landsberger Strasse 65 • 82110 Germering • 089/84 93 07-40 • Fax: [phone]
GREAT BRITAIN: Unit 2 Commerce Park, Brunel Road • Theale • Berkshire RG7 4AB • 0118 929 7500 • Fax: [phone]
INDIA: Flat 2B, Willocrissa • 14, Rest House Crescent • Bangalore 560 001 • 91-80-509-1320/21 • Fax: [phone]
ITALY: Viale San Gimignano, 38 • 20146 Milano • 02-48 39 16 01 • Fax: [phone]
JAPAN:

New Pier Takeshiba North Tower 13F • 11-1, Kaigan 1-chome • Minato-ku, Tokyo 105-0022 • 81-3-5733-7555 • Fax: [phone]

KOREA: 2FL., URI Building • 2-14 Yangjae-Dong • Seocho-Gu, Seoul 137-888 • 82-2-574-7778 • Fax: [phone]
NETHERLANDS: Postbus 559 • 4200 AN Gorinchem • 0183-635333 • Fax: [phone]
SWEDEN: c/o Regus Business Centre • Frosundaviks Allé 15, 4tr • 169 70 Solna • 08-509 04 679 • Fax: [phone]
SWITZERLAND: Kriesbachstrasse 4 • 8600 Dübendorf • 01-821 94 44 • Fax: [phone]
TAIWAN: 1FL., 85 Po Ai Street • Hsinchu, Taiwan, R.O.C. • 886-3-572-9077• Fax: [phone]

© Copyright 2001 Keithley Instruments, Inc.

Printed in the U.S.A.

4/02