Fluke 91 Series II, 92 Series II, 96 Series II, 105 Series II User Manual

Date 950401

© 1995 Fluke Corporation, All rights reserved.
All product names are trademarks of their respective companies.

Fluke91/92/96/105

ScopeMeter Series II

Users Manual

i

I

TABLE OF CONTENTS

CHAPTER 1 INTRODUCING YOUR SCOPEMETER TEST TOOL

SCOPEMETER TEST TOOL FEATURES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

USING THE HOLSTER AND THE TILT STAND

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

POWERING THE SCOPEMETER TEST TOOL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

MINIMIZING SIGNAL NOISE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

CHARGING THE BATTERY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

LOOKING AT ALL
MEASUREMENT CONNECTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

READING THE DISPLAY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

USING THE KEYS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

STEPPING THROUGH A WINDOW

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

USING ON-LINE INFORMATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

CHAPTER 2 GETTING STARTED

ADJUSTING THE DISPLAY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

SELECTING THE PROBE TYPE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

POWER-ON CONFIGURATIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

PERFORMING AN EASY SETUP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

USING THE DEMONSTRATION (DEMO) BOARD

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

CHAPTER 3 MAKING MEASUREMENTS

MAKING CONNECTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

USING THE MEASUREMENT FUNCTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

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USING A SHORTCUT TO MOST COMMONLY MEASUREMENTS

. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

ORDERING MEASUREMENT READINGS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

MEASURING FUNCTIONS NOT AVAILABLE FROM THE MEASURE MENU

. . . . . . . . . . . . . . . . . 3-10

USING THE MEASUREMENTS MAP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

CHAPTER 4 USING THE DUAL DISPLAY MODE FUNCTIONS

MAKING CONNECTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

SELECTING A MAIN MODE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

SELECTING RANGES (MANUAL/AUTO RANGE)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

HOLDING A STABLE MEASUREMENT (TOUCH HOLD



)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

DISPLAYING MINIMUM AND MAXIMUM READINGS WITH RELATED TRENDPLOT

. . . . . . . . . . . 4-9

SELECTING THE SCOPEMETER KEY SUBMENU

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

MAKING MEASUREMENTS IN V AND EXT.mV MODE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

TAKING RELATIVE READINGS (SCALING)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

CHAPTER 5 USING IN SCOPE MODE

MAKING CONNECTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

MAKING AN EASY SETUP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

CONTROLLING INPUTS A AND B

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

ADJUSTING THE AMPLITUDE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

ADJUSTING THE TIME BASE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

POSITIONING THE WAVEFORM ON THE DISPLAY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

ACQUIRING WAVEFORMS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

SELECTING THE SCOPE SUBMENU

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

TRIGGERING

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

DISPLAYING THE MINIMUM AND MAXIMUM OF A WAVEFORM

. . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

MAKING COMBINATIONS WITH INPUT A AND INPUT B

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

III

DISPLAYING MULTIPLE WAVEFORMS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

ADAPTING THE DISPLAY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

MORE INFORMATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

CHAPTER 6 USING ADDITIONAL CAPABILITIES

MAKING MEASUREMENTS USING THE CURSORS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

DELETING MEMORIES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

SAVING TO MEMORY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

RECALLING FROM MEMORY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

USING WAVEFORM MATH FUNCTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

USING A PRINTER

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

USING THE WAVEFORM GENERATOR

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17

TESTING COMPONENTS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17

CHANGING THE RESET CONFIGURATIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19

ALTERING THE CONTINUOUS AUTO SET CONFIGURATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

CHAPTER 7 MEASURING EXAMPLES

MEASURING TEMPERATURE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

MEASURING CURRENT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

MEASURING POWER WITH MATH FUNCTION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

MEASURING THREE-PHASE ON A DUAL INPUT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

MEASURING PHASE USING THE CURSORS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12

MEASURING PULSE RESPONSE OF AN AMPLIFIER

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14

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CHAPTER 8 SCOPEMETER TEST TOOL TUTORIAL

TESTING POTENTIOMETERS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

MAKING LOW FREQUENCY VOLTAGE MEASUREMENTS WITH THE METER

. . . . . . . . . . . . . . . 8-5

ASSISTING CONTINUOUS AUTO SET ON COMPLEX WAVEFORMS

. . . . . . . . . . . . . . . . . . . . . . 8-10

MAKING LOW FREQUENCY MEASUREMENTS WITH THE SCOPE

. . . . . . . . . . . . . . . . . . . . . . . 8-17

MAKING SINGLE SHOT MEASUREMENTS WITH THE SCOPE

. . . . . . . . . . . . . . . . . . . . . . . . . . . 8-20

FINDING HIDDEN WAVEFORM DETAILS WITH THE SCOPE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22

MAKING SCOPE CURSOR MEASUREMENTS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-26

USING THE MATH FUNCTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-32

CHAPTER 9 USER MAINTENANCE

CLEANING

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

KEEPING BATTERIES IN OPTIMAL CONDITION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

REPLACING AND DISPOSING OF BATTERIES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

REPLACING FUSES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5

CALIBRATING THE PROBES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5

CHAPTER 10 APPENDIXES

10A SPECIFICATIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

10B PARTS AND ACCESORIES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11

10C PM8907 INFORMATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-15

10D RECOMMENDED PRINTER SETUP PARAMETERS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17

10E WARRANTY AND SERVICE CENTERS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-19

10F TERMINOLOGY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-25

10G MENU MAP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-31

V

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ABOUT THIS MANUAL

Chapter 1 Introducing the ScopeMeter Test Tool

This chapter introduces features and capabilities of your
ScopeMeter test tool.

Chapter 2 Getting Started

This chapter provides a 15-minute demonstration intended
for those who are not familiar with the ScopeMeter test
tool.

Chapter 3 Making Measurements

This chapter explores all measurements and specifies the
use of the direct Measure Menu key. At any time, you can
choose over 30 measurements to get an immediate
reading on the display.

Chapter 4 Using the Dual Display Mode

This chapter addresses the use of four Dual Display Mode
Functions of the ScopeMeter test tool: , , , and

. You will learn how to set up the test tool for ac and
dc voltage measurements, diode tests, resistance
measurements, and trend plotting. Chapter 5 contains all
the Scope mode information.

Chapter 5 Using the Scope Mode

This chapter explores the specific use of the test tool as a
digital storage oscilloscope. You will learn how to make,
store, and compare measurements.

Chapter 6 Using Additional Capabilities

This chapter explores the additional capabilities available
with your ScopeMeter test tool. The chapter covers
subjects, such as Scope measurements using the cursors,
saving and recalling screens, waveforms, or setups, and
making a hard copy on your printer.

Chapter 7 Measuring Examples

This chapter outlines step-by-step procedures necessary
to make some typical measurements.

Chapter 8 ScopeMeter Test Tool Tutorial

This chapter looks at special capabilities of your
ScopeMeter test tool. You will become familiar with all
aspects by using the demonstration board.

Chapter 9 User Maintenance

This chapter describes the cleaning of the ScopeMeter test
tool and proper use and replacement of the battery pack.
Periodic probe calibration is also covered here.

VII

Chapter 10 Appendixes

A. Specifications: Operating characteristics.
B. Parts and Accessories: Model numbers and replacement

codes for all parts and accessories delivered with your

ScopeMeter test tool.
C. PM8907 Power Adapter/ Battery Charger.
D. Advised Printer Setup Parameters: How to set up your

printer.
E. Warranty Information and Service Centers: Warranty

terms and Service Center addresses.
F. Terminology: Glossary of special terms.
G. Menu Map: Graphic view of the various menus.

Index

The index at the end of the manual lists words
alphabetically. Consult this list to find an item quickly.

NOTE

Throughout this manual an trough a model number

()

indicates that the function being discussed does not

apply to that specific model number.

91

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WARNING

READ "SAFETY" CAREFULLY BEFORE USING YOUR
SCOPEMETER TEST TOOL.

SAFETY

The instrument described in this manual is designed to be
used only by qualified personnel.

Safety Precautions

To use this instrument safely, it is essential that operating
and servicing personnel follow both generally accepted
safety procedures and the safety precautions specified in
this manual.
Specific warning and caution statements, where they
apply, will be found throughout the manual.
Where necessary, the warning and caution statements
and/or symbols are marked on the instrument.

A CAUTION identifies conditions and actions that may
damage the test tool.

A WARNING IDENTIFIES CONDITIONS AND ACTIONS
THAT POSE HAZARD(S) TO THE USER.

International electrical symbols used are explained below.

The terms "Isolated" or "Electrically floating" are used in
this manual to indicate a measurement in which the
ScopeMeter test tool COM (common, also called ground) is
connected to a voltage different from earth ground. The
term "Grounded" is used in this manual to indicate a
measurement in which the ScopeMeter test tool COM
(common) is connected to an earth ground potential.

The ScopeMeter test tool COM (common) inputs (red
INPUT A BNC shield, grey INPUT B BNC shield, and black
4-mm banana jack) are connected internally via self­recovering fault protection. The input connectors have no
exposed metal and are fully insulated to protect against
electrical shock. The black 4-mm banana jack COM
(common) can be connected to a voltage above earth
ground for isolated (electrically floating) measurements

Caution (see
explanation in manual)

DOUBLE
INSULATION
(Protection Class)

Common (Lo) input
symbol, equal
potential

Recycling symbol

High BNC input
symbol

DC-Direct Current

Earth AC-Alternating

Current

IX

and is rated up to 60 0V rms above earth g roun d. The ScopeMeter test tool uses a three-lead connection sys-

tem for dual input, isolated (electrically floating) measure­ments. The connections for isolated and grounded
measurements are shown in the following illustration.

Figure 1 Common (Ground) Connections

NOTE

Fluke 91 has a two lead connection system.

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WARNING

DO THE FOLLOWING TO AVOID ELECTRICAL SHOCK
IF A SCOPEMETER TEST TOOL

COM (COMMON)

INPUT IS CONNECTED TO >42V PEAK (30V RMS):

1. USE ONLY THE TEST LEAD/PROBE SET SUPPLIED
WITH THE SCOPEMETER TEST TOOL (OR
SAFETY-DESIGNED EQUIVALENTS WITHOUT
EXPOSED METAL CONNECTORS).

2. DO NOT USE CONVENTIONAL EXPOSED METAL
BNC OR BANANA PLUG CONNECTORS IF THE

COM (COMMON) IS >42V PEAK (30V RMS).

3. USE ONLY ONE COM (COMMON) CONNECTION
(THE 4-MM BLACK BANANA JACK).

4. REMOVE ALL PROBES AND TEST LEADS THAT
ARE NOT IN USE.

5. USE 600V RATED PROBE TIP ADAPTERS.
"600V" IS PRINTED ON EQUIPMENT SO RATED.

6. CONNECT THE PM8907 POWER ADAPTER TO THE

AC OUTLET BEFORE CONNECTION TO THE
SCOPEMETER TEST TOOL.

XI

If Safety-Protection is Impaired
Use of equipment in a manner not specified may

impair the protection provided by the equipment.
Before use, inspect probes for mechanical damage
and replace damaged probes!

Whenever it is likely that safety has been impaired, the
instrument must be turned off and disconnected from line
power. The matter should then be referred to qualified
personnel. Safety is likely to be impaired if, for example,
the instrument fails to perform the intended measurements
or shows visible damage.

MAKING ISOLATED MEASUREMENTS

Isolating from Earth Ground

The ScopeMeter test tool uses a three-lead connection
system for dual input, isolated (electrically floating)
measurements. Use a test lead connected to the black 4-mm
banana jack as common ground.

There are only three wires to connect for dual input isolated
ground operation, useful for three-phase industrial voltage
measurements. You can connect the three leads on the
test tool (INPUT A, INPUT B, and common) to a three­phase electrical power line in any order. Use the A-B mode
(see Chapter 5) to display all three phases of electrical
power at the same time.

For three-phase electrical or other isolated ground
industrial measurements, we strongly recommend that you
use the black Industrial Alligator Clip and the red and grey
Industrial Probe Alligator Clips (see Figure 4). These parts
are included with original purchase ScopeMeter test tools
and are also available as accessories from your FLUKE
representative.

Isolating from Input to Input

The ScopeMeter test tool is not isolated between inputs but
uses the black 4-mm banana jack for measurements
isolated from earth ground.

Complete isolation between INPUT A and INPUT B is
useful for some floating measurement applications, such
as measuring different isolated transformer windings at the
same time.

For those applications requiring true

isolated grounds
(commons) between inputs, we recommend that you make
two separate measurements or use two ScopeMeter test
tools.

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PREPARING TO USE THE DEMONSTRATION (DEMO) BOARD

A Demo Board with 9V battery is included in your ScopeMeter test tool kit. It generates different types of waveforms that can
be measured at test points TP1 to TP5. All descriptions and measurement examples refer to a waveform that can be
measured on the Demo Board.
Do not connect the Demo Board yet, but when you make measurements, do the following:

•

Place the Demo Board on a non-conductive surface.

•

Connect the 9-volt battery, and make sure that polarity is correct.

The displays and measurements shown in this manual are typical. They will vary depending on the condition of the Demo
Board battery.

XIII

Figure 2 Demo Board

Non-conductive

surface

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XV

Single Input Connection

with Mini Test Hook

Single Input Connection

with HF Adapter

Dual Input Connections

with Mini Test Hooks

Dual Input Connections

with HF Adapters

Figure 3 Input Connections for High Frequency Electronic Measurement

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XVII

Single Input Connection

with High Voltage

Test Pin

Single Input Connection

with High Voltage

Test Pin & AC20

Dual Input Connections with

Industrial Alligator Clips

(PM9084/001 & AC20)

Single Input Connection with

Industrial Alligator Clips

(PM9084/001 & AC20)

Figure 4 Input Connections for Isolated Heavy Duty Industrial Measurements

SCOPEMETER TEST TOOL FEATURES . . . . . . . . . 1-2

USING THE HOLSTER AND THE TILT STAND . . . . 1-3

POWERING THE SCOPEMETER TEST TOOL . . . . . 1-4

MINIMIZING SIGNAL NOISE . . . . . . . . . . . . . . . . . . . 1-5

CHARGING THE BATTERY . . . . . . . . . . . . . . . . . . . . 1-6

Saving Battery Life . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

LOOKING AT ALL

MEASUREMENT CONNECTIONS . . . . . . . . . . . . . . . 1-7

Common Ground, Inputs A B . . . . . . . . . . . . . . . . . 1-7

Input/Output Terminal Ratings . . . . . . . . . . . . . . . 1-7

RS-232 Optical Interface Connection . . . . . . . . . . 1-7

READING THE DISPLAY . . . . . . . . . . . . . . . . . . . . . 1-8

Reading a Dual Display . . . . . . . . . . . . . . . . . . . . . 1-9

Reading a Scope Display . . . . . . . . . . . . . . . . . . . 1-9

Reading a Window Display . . . . . . . . . . . . . . . . . . 1-9

USING THE KEYS . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

STEPPING THROUGH A WINDOW . . . . . . . . . . . . 1-12

USING ON-LINE INFORMATION . . . . . . . . . . . . . . 1-13

Chapter 1

Introducing your ScopeMeter Test Tool

1 - 2 91/92/96/99/105 Users Manual

SCOPEMETER TEST TOOL FEATURES

Your ScopeMeter test tool combines the capabilities of an
easy-to-use digital storage oscilloscope with the versatility
of a digital multimeter. When you select a measurement
function, the test tool automatically chooses the best setup
to analyze and compare complex waveforms, or simply to
read voltage levels.

ScopeMeter test tool features include:

•

Digital Storage Oscilloscope.

•

3 2/3-digit, 5-MHz Digital MultiMeter (DMM).

•

Battery power.

•

Measure menu for quick setup.

•

Continuous Auto Set function for hands-off signal
probing.

•

Large memory for front panel Setups, Waveforms, and
Screens.

•

Min Max TrendPlot function with time stamp for long
term recording.

•

Optical to RS-232 interface port, 600V isolation.

•

Instant Information key.

Introducing The ScopeMeter Test Tool 1 - 3

USING THE HOLSTER AND THE TILT STAND

The ScopeMeter test tool is cradled in a holster that provides
shock protection during rough handling. All keys and
connections are accessible with the holster in place. You will
need to remove the holster only to replace the batteries or
access the Quick Operating Guide. (See Chapter 9 for
battery replacement instructions.)

The test tool is also equipped with a multiposition tilt stand,
allowing viewing from different angles. The stand can also
be used to hang the test tool at a convenient viewing
position. Simply push up on the quick release and tilt the
stand. The tilt stand/bracket is fully usable with the holster
in place. Typical positions are shown in Figure 1-1.

Figure 1-1 Multiposition Stand

RELEASE

HERE

1 - 4 91/92/96/99/105 Users Manual

POWERING THE SCOPEMETER TEST TOOL

The test tool can be powered from any of the following
sources. Refer to Figure 1-2.

•

Internal Battery Pack (PM9086)
A rechargeable NiCad Battery Pack comes installed in
every test tool.

•

C Cell Batteries
You can use four alkaline batteries in place of the
NiCad Battery Pack. (The charger is defeated when
standard C cells are installed).

•

Power Adapter (PM8907)
The Power Adapter/Battery Charger powers the test
tool from a standard ac outlet. The test tool can be used
during battery charging. Verify that your local line
voltage is appropriate before using the Power
Adapter/Battery Charger to power the test tool and/or
charge the battery pack.

See Appendix 10C for more information.

•

Automotive Adapter (PM9087, optional)
The Automotive Adapter powers and charges from a
standard 12V dc automotive accessory (lighter) outlet.

Refer to Chapter 9 for battery replacement instructions.

Figure 1-2 Power Connections

EXTERNAL
POWER
SOCKET

Introducing The ScopeMeter Test Tool 1 - 5

MINIMIZING SIGNAL NOISE

In general, using your test tool on battery power only will
minimize noise pickup. Using the 10:1 probe will help in
noise rejection.

If you use the Power Adapter (PM8907), connect a test
lead from the black 4-mm banana jack COM (common) to
the measurement common (ground) of the system under
test. This technique reduces or eliminates any power line
related noise.

1 - 6 91/92/96/99/105 Users Manual

CHARGING THE BATTERY

WARNING

TO AVOID ELECTRICAL SHOCK, USE ONLY A BATTERY
CHARGER THAT IS AUTHORIZED FOR USE WITH
SCOPEMETER TEST TOOL.

Use the following procedure to charge the battery pack and
power the instrument:

1. Connect the Power Adapter/Battery Charger to line
voltage.

2. Insert the Power Adapter/Battery Charger low voltage
plug into the Power Adapter connector of the
ScopeMeter test tool. The test tool can now be used
while the NiCad batteries charge slowly. If the test tool
is turned off, the batteries charge more quickly.

During operation, when the batteries are low, a blinking
battery symbol appears on the top right of the
display. When this occurs there is typically more than
30 minutes of operating time left.

3. The Power Adapter/Battery Charger uses a trickle charge
for the batteries, so no damage can occur if you leave it
charging for long periods, e.g., through the weekend.
Typically a 21-hour recharge provides 5 hours (Fluke 91,
92, 96 and 99 : 4 hours) of use.

Saving Battery Life

When operated only on batteries, the test tool conserves
power by shutting itself down. If no new keys have been
pressed for 5 minutes or if the battery level is too low, the
test tool beeps and displays a message. This prompts you to
turn off the test tool or to continue. If no key is pressed
during the next 5 minutes, the test tool turns itself off
automatically .

When the is pressed ON, the last configuration prior to
the automatic shutdown will be restored.

Automatic power shutdown will not occur if Min Max is on
or if any key is pressed. Although recording will continue if
the batteries are low, memory retention is not jeopardized.

If the POWER ADAPTER is connected, there is no
automatic power shutdown.

Introducing The ScopeMeter Test Tool 1 - 7

LOOKING AT ALL
MEASUREMENT CONNECTIONS

The ScopeMeter test tool provides four signal connection
points: two safety BNC jack inputs (red INPUT A and grey
INPUT B ) and two safety 4-mm banana jack inputs
(COM and

Ω

EXT.mV). This arrangement is shown in
Figure 1-3. All connections are positioned within a protective
recess at the top of the instrument. The banana jacks are
also used as Waveform Generator Output.

Figure 1-3 Measurement Connections

In mode, you can use the red INPUT A BNC jack
and the grey INPUT B BNC jack as input.
In mode, only the red INPUT A BNC jack is used
as input.
In , , and modes, use the red and black 4-mm
banana jacks.

For low frequency measurements (up to about 2 MHz),
ground can be connected to the black 4-mm banana jack.
For higher frequencies you must use the HF Adapter or
Mini Testhook on the probe.

The red 4-mm banana jack also serves as an input
connection for an external trigger in Scope mode or as an
output connection for the waveform generator. This
waveform generator can provide voltage or current output.

Common Ground, Inputs A B

The test tool uses a three-lead connection system for dual
input, isolated (electrically floating) measurements.

Input/Output Te rminal Ratings

Maximum voltage ratings are defined near the related
terminal. Refer to the Specifications in Appendix 10A for
complete terminal rating information.

91

91 92 96

INPUT B is not available for FLUKE 91

91

91

1 - 8 91/92/96/99/105 Users Manual

RS-232 Optical Interface Connection

The Optically Isolated RS-232 Adapter/Cable (PM9080) can
be connected to the test tool for printer output and computer
interface. Using the FlukeView software for DOS and
Windows adds the following functionality to your
ScopeMeter test tool:

•

Storing of measurements in memory for later retrieval.

•

Comparing of measurements with reference examples.

•

Storing, analyzing, and documenting measurements.

The following table shows the printing and communication
features for each model:

READING THE DISPLAY

The display provides a great deal of information. The major
part of the display is always devoted to meter readings or
the scope waveform. A Dual display appears in ,

, , and modes, and is divided into two areas:
Main display and Bottom display. A Scope display appears
in mode, and is divided into three areas: Top
display, Main display, and Bottom display.

Refer to Figure 1-4 during the following discussions.

Figure 1-4 ScopeMeter Test Tool Display

91 92 96 99 105
Screen dump using FlukeView
Direct output to printer
Remote control via computer software

Introducing The ScopeMeter Test Tool 1 - 9

Reading a Dual Display

Main Display: Displays the numeric readings combined
with a full screen-width waveform display.

Bottom Display: Displays the menu that provides
choices available through the function keys and shows
which are active.

Reading a Scope Display

Top Display: Identifies the voltage range, type of signal
coupling, selected probe type for INPUT A and INPUT B,
time scale, trigger source, and trigger slope. The top right
area displays the present status of the test tool, AUTO,
MANUAL, RUN, HOLD, etc.

Main Display: Displays the actual or stored waveforms
(Scope mode).

Bottom Display: Displays the menu that provides
choices available through the function keys and shows
which are active.

Reading a Window Display

When you change a setup, a part of the Main display area
is used for a window. It displays choices accessed with the
related function key from which you make a selection by
pressing (SELECT ITEM). The waveform area is
compressed to about 50% (amplitude) size, and the
window replaces the bottom half of the Main display.

1 - 10 91/92/96/99/105 Users Manual

USING THE KEYS

Figure 1-5 The Keypad

The keys with a predefined function, regardless of the test
tool's mode, are called keys or hard keys. Usally they give
access to a menu, where items can be selected.

The two yellow keys and provide the possible
ways to find your measurement.

gives immediate access to a list of measurements.
When you choose a measurement, the test tool automati­cally selects the related main mode.

gives access to the Main menu. Here you can
choose from the five main modes: , , , ,
and . Pressing gives you more control over
the selected main mode.

Introducing The ScopeMeter Test Tool 1 - 11

Figure 1-6 shows the basic navigation of the test tool.

Figure 1-6 Basic Navigation

The five blue keys

,

,

,

, and are
called function keys. These keys change function based on
the present active menu. Actual function key definitions
appear on the bottom display. Function keys and windows
work together to provide a complete menu-driven user
interface.

is the MORE function key, which opens the window
assigned to the key.
When you press the Submenu key for any main function,
the , , , and keys allow immediate
access to the more common functions that are also under
the (MORE function key).

The

keys are used to choose an item in a box,
or directly from the window. These keys are indicated by
two arrows.

Yellow Yellow Dark grey

Hard key

SubMenu Structure

Most common Functions

also found under

Dark grey

1 - 12 91/92/96/99/105 Users Manual

STEPPING THROUGH A WINDOW

When a window appears, the assignments to the function
keys change as follows:

is the 'CLOSE' key, which closes the active window.
is the 'CANCEL' key, which ignores changed

selections and closes the active window.

is the 'SELECT ITEM' key, which opens and closes a

list box and selects the highlighted item.
Stepping through a window has a fixed sequence as

shown in Figure 1-7.

Figure 1-7 Sequence to Go Through a Window

The fixed sequence is as follows:

¿

Press a MORE function key. This opens a
window.

(Press (NEXT PAGE) or (PREVIOUS PAGE) to
choose an item on page 2 or page 3.)

¡

or Choose the item that has to be changed.

¬

Open the list box.

Ð

or Choose the new parameter.

ƒ

This selects the new parameter and closes the
list box.

Repeat steps

¡

through ƒ for more items.

Ý

Close the window and continue measurements.

Introducing The ScopeMeter Test Tool 1 - 13

USING ON-LINE INFORMATION

You can get information about functions at any time by
pressing . The short descriptions will help you under­stand how the test tool functions.

When you operate the ScopeMeter test tool, the display
provides information about the present condition or
explains procedures taking place and asks for confirmation.
These messages are always displayed in a box.

More information is available by pressing . This
displays one or more pages of extended on-line information.
More information is available under the following conditions:

- In a menu (F1 to F5) you always can get information on
the functions for every function key.

- In a window you can get more information about the
highlighted function when the icon is displayed.

- In a message you can get more information about the
conflict with the present setup when the icon is dis­played. If necessary, the test tool asks for confirmation
and disables the conflicting situation.

Figure 1-8 hows an example of a "function info" screen.
You can set the help level for on-line information to high or

low. This is explained in Chapter 6.

Figure 1-8 Using On-Line Information

•

When you have read the displayed information, press

to exit the information mode.

This returns the test tool to the latest setup before you
pressed , and you can continue your measurement.

=== ST7535 pcx ===

ADJUSTING THE DISPLAY . . . . . . . . . . . . . . . . . . . . 2-3

Adjusting the Contrast . . . . . . . . . . . . . . . . . . . . . . 2-3

Turning the Backlight On and Off . . . . . . . . . . . . . . 2-3

SELECTING THE PROBE TYPE . . . . . . . . . . . . . . . . 2-4

POWER-ON CONFIGURATIONS . . . . . . . . . . . . . . . . 2-4

Master Reset (Default Startup) . . . . . . . . . . . . . . . 2-4

Power-on/save memory . . . . . . . . . . . . . . . . . . . . . 2-5

PERFORMING AN EASY SETUP . . . . . . . . . . . . . . . 2-5

USING THE DEMONSTRATION (DEMO) BOARD . . 2-6

Quick Measurement Demonstration. . . . . . . . . . . . . 2-7

Performing Some Meter Operations . . . . . . . . . . . 2-10

Performing Some Scope Operations . . . . . . . . . . . 2-12

Chapter 2

Getting Started

2 - 2 91/92/96/99/105 Users Manual

This chapter provides a 15-minute demonstration intended
for those who are not familiar with the ScopeMeter test tool.
It gives some hands-on experience, with an emphasis on
learning by seeing and doing. Those who are familiar with
the test tool can skip the following pages and continue to
Chapter 3.

•

Press to turn on the test tool.

Operation begins in the last-known configuration. Factor y
default settings are used at the first power-on. Subsequent
power-ons maintain configuration changes made with
keystrokes or through recall of a setup memory during the
previous session.

Getting Started 2 - 3

ADJUSTING THE DISPLAY

Adjusting the Contrast

•

Use

to adjust the contrast of the display to
your preference. Note that new contrast adjustment of
the display is stored in memory until a new adjustment
is made.

Figure 2-1 Contrast adjustment

Contrast adjustment can also be made after you have
pressed , and you have highlighted the contrast with

, and pressed to select. is then

visible in the right bottom of the display.

Turning the Backlight On and Off

1. Press to turn on the backlight. The actual power
source,

BATTERIES

or POWER ADAPTER appears for

a moment on the display.

NOTE

Using the backlight shortens battery power operation time
by about

1

/2 hour.

2. Press to turn off the backlight again.

2 - 4 91/92/96/99/105 Users Manual

SELECTING THE PROBE TYPE

To prevent measurement errors, ensure that your test tool
is adapted to your probe at power-on. Note that the
PM8918 probes, delivered with the test tool, have an
attenuation of 10:1.

For accurate measurement, periodic probe calibrations are
necessary. This is explained in Chapter 9, "User Mainte­nance".

POWER-ON CONFIGURATIONS

There are two different ways to reset the ScopeMeter test
tool: the Master Reset, and the power-on/save memory.

Master Reset (Default Startup)

CA UTION

A Master Reset clears everything saved in memory.
Never perform a Master Reset unless you are prepared
to lose everything you saved in memory.

1. Turn the ScopeMeter test tool off.

2. Press and hold .

3. Press and release .
The test tool turns on, and you should hear a double
beep, indicating the Master Reset was successful. The
screen should display input: A PROBE 10:1 on top of
the waveform area.

4. Release .

Perfor m a Master Reset only to make sure that your test
tool is in the initial settings condition. Master Reset sets the
test tool for using 10:1 probes.

See Chapter 6 for more information about Master Reset
conditions.

Getting Started 2 - 5

Power-on/save memory

This procedure also resets the ScopeMeter test tool and
sets the probe range to 10:1. The Reset does not clear the
memories.

1. Turn the test tool off.

2. Press and hold .

3. Press and release .
The test tool turns on, and you should hear a double
beep. input: A PROBE 10:1 appears on the display.

4. Release .

Use this feature when you have saved a setup, screen, or
waveforn in memory.

PERFORMING AN EASY SETUP

For quick operation, the test tool is equipped with a
Continuous Auto Set function. This function optimizes the
range and the time in all modes and assures a stable
picture on nearly all waveforms. You only need to press

to activate. Once activated this function permits

hands-off probing.
You can redefine the Continuous Auto Set configuration to

your own preference. Refer to Chapter 6 for more informa­tion.

2 - 6 91/92/96/99/105 Users Manual

USING THE DEMONSTRATION (DEMO)
BOARD

During the Quick Measurements, Quick Meter Operations,
and Quick Scope Operations, you use the Demo Board
that is included in your ScopeMeter test tool kit. Before
doing any measurement, review the safety precautions in
the beginning of this manual. Refer to Figure 2-2 for the
setup of this demonstration.

•

Connect the red scope probe to TP2.

Continue with the Quick Measurements Demonstration for
more hands-on training using active waveforms.

NOTE

The displays and measurements are typical. They will var y
depending on the condition of the Demo Board battery.

Figure 2-2 Demonstration setup

Getting Started 2 - 7

1. + Perform a Reset at Power ON.
At power-on, all five function key definitions in the bottom display are assigned to the Main
menu. Notice that METER is highlighted.

Ensure the probe range is 10:1, as indicated on the display.
The screen displays about "03.43 Vrms AC" and "+02.15 V DC" in large numbers, and

34.44 Hz in smaller numbers. (The values can var y depending on the condition of the Demo
Board battery.) An additional scope trace gives a graphical representation of the waveform.

2. Open the Measure menu; the five function keys now are assigned to: MORE MEASURE, V,
Hz, dB, or TIME.

Continued on next page

QUICK MEASUREMENTS DEMONSTRATION

2 - 8 91/92/96/99/105 Users Manual

3. Open the VOLT measurement menu; a list of the voltage measurements appears on the
display

4. +

Use these keys to choose a measurement. For now, highlight Vrms AC+DC.

5. Press this function key to select Vrms AC+DC. The value of about "4.00 Vrms AC+DC"
appears as the main top reading on the display. The previous readings are now shifted down
one. Note that the Hz has been removed.

6. Open the TIME measurement menu; a list of the time-related measurements appears on the
display.

7. +

Choose another measurement. For now, highlight rise time.

91 92

Continued on next page

QUICK MEASUREMENTS DEMONSTRATION

Getting Started 2 - 9

8. Some measurements are done in another mode. This message appears in a double-lined bo x
on the display: "This measurement is possible in SCOPE mode. Change to SCOPE mode
now ?".

9. The test tool changes automatically to the Scope mode. You can now find the Rise Time
measurement result below the waveform area.

10. The left and right cursors move across the display. The intersection of waveform and cursor
mark the level for the two horizontal cursors.

This completes the Quick Measurements Demonstration; continue with the Meter Operations.

QUICK MEASUREMENTS DEMONSTRATION

2 - 10 91/92/96/99/105 Users Manual

If you have not already done so, perform a + reset.

1. Set the Display to 3V manual range, about "3.412 Vrms AC" and "+2.127 V DC" appear, and the
amplitude of the graphical representation increases.

2. Press this key once to measure a stable display . TOUCH HOLD appears in the top right of the
display.

3. Press this key once again to resume new measurements.

4. Press this key. The display changes to 1V range. The voltage readings are overloaded, and
"OL Vrms AC" and "+OL V DC" appear.

5. The test tool automatically assumes a new setup that is optimized for measur ing the actual
input signal.

Input A

Input A

Continued on next page

PERFORMING SOME METER OPERATIONS

Getting Started 2 - 11

6. Press this key once to start recording the maximum, average, minim u m, and max-min measure­ments. At the same time the trend plot representation appears at the lower area of the display.

7. Press this key again to stop Min Max recording and trend plot. But first a message "All MIN­MAX recordings will be lost. Are you sure?" appears to alert for the consequences.

8. Continue with your measurements.

Continued on next page

PERFORMING SOME METER OPERATIONS

2 - 12 91/92/96/99/105 Users Manual

9. Open the Meter-submenu mode. The five function keys are now assigned to the meter­submenu identifiers.

10. Open the More Meter window. The window enables you to change several settings in Meter
mode.

11. Go to the next page and find more settings that you can change.

12. Close the window again, without changing the setup configuration of the test tool.

This completes the Meter Operations demo; continue with the Scope Operations.

PERFORMING SOME METER OPERATIONS

Getting Started 2 - 13

If you have not already done so perform a + reset.

1. Activate the Scope Mode, then press . An image of the waveform appears on the
display. The top display shows the attenuator, probe, time base, and trigger information.

2. The waveform amplitude decreases. The attenuator scale in the top display changes to a less
sensitive range.

3. The number of periods of the wavefor m increases. The time base scale in the top display
changes to a slower time/DIV.

4. The waveform shifts upwards.

5. The waveform shifts to the right of the display.

Input A

Input A

Continued on next page

PERFORMING SOME SCOPE OPERATIONS

2 - 14 91/92/96/99/105 Users Manual

6. The test tool automatically selects attenuation, time base, and triggering to give you a
readable display of the waveform.

7. Press this to look at the Trigger menu now.

8. This begins to display as the waveform rises above the trigger level (+SLOPE) or falls below
the trigger level (-SLOPE). Watch the display; the wavefor m starts at a different place as
trigger + or - is selected. Continue with +SLOPE selected.

9. This activates the ADJUST LEVEL function. The level value is displayed in the right bottom,
and is visualized by the " " icon on the left edge of the display. Ensure also that RUN is
displayed in the top right of the display as an indication that your test tool is triggered.

a

Continued on next page

PERFORMING SOME SCOPE OPERATIONS

Getting Started 2 - 15

10. Adjust the trigger level: the " " icon moves upward as you change the trigger level. When
the level is more than the waveform value, RUN changes into NOTRIG, and the display
becomes unstable; your test tool is no longer triggered.

11. Adjust the trigger level to about 50% of the waveform amplitude, so that your test tool is
triggered again.

12. Turn your ScopeMeter test tool off.

You are now able to operate basic functions in routine applications. Continue with Chapters 3 and 4 for a more detailed
discussion of the ScopeMeter test tool functions.

a

PERFORMING SOME SCOPE OPERATIONS

MAKING CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . 3-2

USING THE MEASUREMENT FUNCTIONS . . . . . . . 3-3

USING A SHORTCUT TO MOST

COMMONLY MEASUREMENTS . . . . . . . . . . . . . . . . 3-9

ORDERING MEASUREMENT READINGS . . . . . . . 3-10

MEASURING FUNCTIONS NOT

AVAILABLE FROM THE MEASURE MENU . . . . . . 3-10

Additional measurements for Meter

and EXT.mV modes . . . . . . . . . . . . . . . . . . . . . . 3-10

Additional measurements for the Scope mode . . 3-11

USING THE MEASUREMENTS MAP . . . . . . . . . . . 3-12

Chapter 3

Making Measurements

3 - 2 91/92/96/99/105 Users Manual

MAKING CONNECTIONS

ScopeMeter test tool measurement connections are
illustrated in Figure 3-1.

Use the red INPUT A BNC jack or the red and black 4 mm
banana jacks for measurements. The ScopeMeter test tool
informs you when to use INPUT A or the banana jacks.

The red 4-mm banana jack is used for diode test, continuity
test, Ohm measurement, and when you use a Current or
Temperature probe with banana jacks.

When you use the PM8918 probe, select the 10:1 probe
type for correct decimal readout.

Figure 3-1 Measurement Connections

Making Measurements 3 - 3

USING THE MEASUREMENT FUNCTIONS

Use the Measure menu to choose one or more automatic
measurements. Simply choose your desired measurement
and the test tool sets itself up and displays the result.

•

Regardless of the mode you are in, press to
access the Measure menu.

Press (MORE MEASURE) to access a multipaged
(seven pages) list of all possible measurements. Press

(PREVIOUS PAGE) and (NEXT PAGE) to step

through the pages in the More Measure window.

On a page, use and to highlight the desired
measurement, then press to select. This activates
your chosen measurement and closes the window. The
measurement result is instantly displayed on the screen.

Measure Menu

3 - 4 91/92/96/99/105 Users Manual

See Figure 3-2 for screen examples in Dual Display mode
and Scope mode.

Figure 3-2 Measurement results in Dual Display mode

and Scope mode

ATTENTION

The Scope Mode measurements are not valid for the
FLUKE 91 and 92

The measurements in the More Measure window are listed
below.

Page 1 of 7:
OHM

Ω

Measure the resistor value (Ω) of a resistor

connected to the red and black 4-mm banana jacks.
DIODE Test a diode that is connected to the red and

black 4-mm banana jacks. The red banana jack is the high
input while the black one is the low. The result is displayed
as the forward or reverse voltage of a diode.

CONTINUITY

Ω

Detect an open or closed circuit that is
connected to the red and black 4-mm banana jacks. A
beeper draws your attention when the circuit is closed.

°C PROBE EXT.mV Detect a temperature in degrees
Celsius with a Temperature probe (optional) that is
connected to the red and black 4-mm banana jacks.

°F PROBE EXT.mV Detect a temperature in degrees
Fahrenheit with a Temperature probe (optional) that is
connected to the red and black 4-mm banana jacks.

ACCESSORY (mV) EXT.mV Measure millivolts with an
accessory that is connected to the red and black 4-mm
banana jacks.

Making Measurements 3 - 5

Page 2 of 7:

NOTE

INPUT A in Meter mode can make separate V DC and
Vrms AC measurements on the same signal at the same
time. V DC and Vrms AC readings are normally displayed
together.

V DC METER Measure the DC (direct) voltage of the
input signal in Meter mode.

Vrms AC METER Measure the RMS (Root Mean
Square) voltage of the input signal in Meter mode. This is
done with DC- coupled input. Allows AC component of
signal to be displayed

Vrms AC+DC METER Measure the true RMS (Root
Mean Square) voltage of the input signal in Meter mode. If
a DC-offset is present, this measurement will read higher
or lower than Vrms AC. If there is no DC offset present, this
measurement will be the same as Vrms AC.

V DC (mean) SCOPE Measure the mean (average of
readings) value of the waveform between the (vertical)
cursors in Scope mode.

Vrms SCOPE Measure the RMS (Root Mean Square)
voltage of the waveform between the (vertical) cursors in
Scope mode.

dV SCOPE Measure the voltage difference between the
(horizontal) cursors in Scope mode.

Page 3 of 7:
V peak/peak SCOPE Measure the difference between

highest and lowest voltage value of the waveform between
the (vertical) cursors in Scope mode.

Vmax peak SCOPE Measure the maximum peak value
of the waveform between the cursors in Scope mode.

Vmin peak SCOPE Measure the minimum peak value
of the waveform between the cursors in Scope mode.

dBV DC METER (decibel Volts) Measure the voltage
ratio of the DC component of a signal with respect to a
reference voltage in Meter mode. This is done with DC­coupled input.

dBV AC METER (decibel Volts) Measure the voltage
ratio of the AC component of a signal with respect to a
reference voltage in Meter mode. This is done with DC­coupled input.

For dBV, you can select a range of references by pressing

or . Choose a voltage between 50 mV and

9.99V. The default value is 1V.

3 - 6 91/92/96/99/105 Users Manual

Page 4 of 7:
A DC METER Measure the DC current in Meter mode

with a Current probe (available as an option) that is
connected to the INPUT A BNC. This is done with DC­coupled input. A list box enables you to select the proper
range: 1, 10, 100 mV/A, or 1 V/A.

A AC METER Measure the AC current in Meter mode
with a Current probe (available as an option) that is
connected to the INPUT A BNC. This is done with DC­coupled input. A list box enables you to select the proper
range: 1, 10, 100 mV/A, or 1 V/A.

A AC+DC METER Measure the AC+DC current in
Meter mode with a Current probe (available as an option)
that is connected to the INPUT A BNC. This is done with
DC-coupled input. A list box enables you to select the
proper range: 1, 10, 100 mV/A, or 1 V/A.

A DC EXTmV Measure the DC current in EXT.mV
mode with a Current probe (available as an option) that is
connected to the red and black 4-mm banana jacks. This is
done with DC-coupled input. A list box enables you to
select the proper range: 1, 10, 100 mV/A, or 1 V/A.

A AC EXTmV Measure the AC current in EXT.mV mode
with a Current probe (available as an option) that is
connected to the red and black 4-mm banana jacks. This is
done with DC-coupled input. A list box enables you to
select the proper range: 1, 10, 100 mV/A, or 1 V/A.

A AC+DC EXTmV Measure the AC+DC current in
EXT.mV mode with a Current probe (available as an option)
that is connected to the red and black 4-mm banana jacks.
This is done with DC-coupled input. A list box enables you
to select the proper range: 1, 10, 100 mV/A, or 1 V/A.

Making Measurements 3 - 7

Page 5 of 7:
Hz METER Measure the frequency of the input signal in

Meter mode.
Hz SCOPE Measure the frequency of the wavefor m in

Scope mode. At least 1

1

/2 cycles of this waveform must

occur between the cursors.
duty cycle + METER Measure the ratio between the

time the signal is positive to the total period time in Meter
mode. It is shown as a percentage figure.

duty cycle - METER Measure the ratio between the
time the signal is negative to the total period time in Meter
mode. It is shown as a percentage figure.

pulse width + METER Measure the duration of the
average positive pulse of the waveform in Meter mode.

pulse width - METER Measure the duration of the
average negative pulse of the waveform in Meter mode.

Page 6 of 7:
dBm DC METER (decibel milliwatt) Measure the power

ratio of the DC component of a signal with respect to 1 mW
in Meter mode. This is done with DC-coupled input.

You can choose 50, 60, 75, 93, 110, 125, 135, 150, 250,
300, 500, 600, 800, 900, 1000, or 1200Ω as reference
impedance.

dBm AC METER (decibel milliwatt) Measure the powe r
ratio of the AC component of a signal with respect to 1 mW
in Meter mode. This is done with DC-coupled input. You
can choose 50, 60, 75, 93, 110, 125, 135, 150, 250, 300,
500, 600, 800, 900, 1000, or 1200Ω as reference
impedance.

dBW DC METER (decibel Watt) Measure the power
ratio of the DC component of a signal with respect to 1W in
Meter mode. This is done with DC-coupled input. You can
choose 1, 2, 4, 8, 16, or 50Ω as reference impedance.

dBW AC METER (decibel Watt) Measure the power
ratio of the AC component of a signal with respect to 1W in
Meter mode. This is done with DC-coupled input. You can
choose 1, 2, 4, 8, 16, or 50Ω as reference impedance.

WATT DC METER Measure the DC audio watts from
the signal in Meter mode. This is done with DC-coupled
input. You can choose 1, 2, 4, 8, 16, or 50Ω as reference
impedance.

WATT AC METER Measure the AC audio watts from
the signal in Meter mode. This is done with DC-coupled
input. You can choose 1, 2, 4, 8, 16, or 50Ω as reference
impedance.

For dBm , dBW, and WATT, you can select a range of
references by pressing or .

3 - 8 91/92/96/99/105 Users Manual

Page 7 of 7:
RPM 1 METER (revolutions per minute) Measure one

count per revolution in Meter mode.
RPM 2 METER (revolutions per minute) Measure one

count per two revolutions in Meter mode.
dt (delta time) SCOPE Measure the time difference

between the (vertical) cursors in Scope mode.
1/dt (frequency) SCOPE Measure the relative

frequency of the waveform in Scope mode. It is shown as
the reciprocal value of the time difference (dt) between the
vertical cursors.

rise time SCOPE Measure the rise time between 10%
and 90% points of the first rising slope of the wavefor m in
Scope mode. First use and to determine the
0% and 100% points of the waveform. These are the
intersection of the cursors with the waveform. Set the rising
slope to at least four time divisions for a precise
measurement. The rise time is now instantly displayed.

Figure 3-3 Rise Time Measurement

Making Measurements 3 - 9

USING A SHORTCUT TO MOST COMMONLY
MEASUREMENTS

From the Measure menu, you can also find many most
commonly used measurements directly under one of the
function keys , , , or . Press one of the
four function keys to choose the type of measurement: V,
Hz, dB, or TIME. This opens a single window with a list of
measurements within the chosen type.

•

Press (V) to open a list with voltage
measurements:

•

Press (Hz) to open a list with frequency
measurements:

Volt List Box

Frequency List Box

•

Press (dB) to open a list with power
measurements:

•

Press (TIME) to open a list with time
measurements:

CANCEL ignores the TIME window selection and returns
to the Measure menu again.

dB List Box

TIME List Box

3 - 10 91/92/96/99/105 Users Manual

ORDERING MEASUREMENT READINGS

At default, three measurement readings are displayed at
the same time, although you can display up to four
readings. See Chapters 4 and 6 for more information.

When you exceed the number of selected readings, all
readings shift down one and your latest chosen
measurement is placed on top. Notice that the previous
bottom reading is then removed.

MEASURING FUNCTIONS NOT AVAILABLE
FROM THE MEASURE MENU

There are also a few more measurements that you can
only find in the Scope, Meter or EXT.mV modes. These are
listed below.

Chapter 4 describes how to select the Meter and EXT.mV
mode measurements, and Chapter 5 the Scope mode
measurements.

Additional measurements for Meter and EXT.mV modes
Vrms AC (no DC) Measure the RMS (Root Mean

Square) voltage of the input signal in Meter mode. This is
done with AC-coupled input so that the DC signal
component is blocked and the r ange is optimized for the AC
signal component. The V DC reading is inhibited due to AC
coupling. In some cases this measurement gives one more
digit of resolution over Vrms AC (DC coupled).

dBV AC+DC (decibel Volts) Measure the voltage ratio of
the AC and DC components of a signal with respect to a
reference voltage in Meter mode. This is done with DC­coupled input.

dBV AC (no DC) (decibel Volts) Measure the voltage
ratio of the AC component of a signal with respect to a
reference voltage in Meter mode. This is done with AC­coupled input so that the DC signal component is blocked
and the range is optimized for the AC sinal component.

Making Measurements 3 - 11

dBm AC (decibel milliwatt) Measure the power ratio of
the AC component of a signal with respect to 1 mW in
Meter mode. This is done with DC-coupled input.

dBm AC (no DC) (decibel milliwatt) Measure the power
ratio of the AC and DC components of a signal with respect
to 1 mW in Meter mode. This is done with AC-coupled input
so that the DC signal component is blocked and the range
is optimized for the AC sinal component.

dBW AC+DC (decibel Watt) Measure the power ratio of
the AC and DC components of a signal with respect to 1W
in Meter mode. This is done with DC-coupled input.

dBW AC (no DC) (decibel Watt) Measure the pow er r atio
of the AC component of a signal with respect to 1W in
Meter mode. This is done with AC-coupled input so that the
DC signal component is block ed and the range is optimiz ed
for the AC sinal component.

WATT AC+DC Measure the AC and DC audio watts from
the signal in Meter mode. This is done with DC-coupled
input. You can choose 1, 2, 4, 8, 16, or 50Ω as reference
impedance.

WATT AC (no DC) Measure the AC audio watts from the
signal in Meter mode. This is done with AC-coupled input
so that the DC signal component is blocked and the range
is optimized for the A C sinal component. You can choose 1,
2, 4, 8, 16, or 50Ω as reference impedance.

For dBV, dBm and dBW, you can select a range of
references by pressing or .

dBV: Choose a voltage between 50 mV and 9.99V. The
default value is 1V.

dBm: Choose one of the following reference impedances:
50, 60, 75, 93, 110, 125, 135, 150, 250, 300, 500, 600,
800, 900, 1000, or 1200Ω.

dBW: Choose one of the following references: 1, 2, 4, 8,
16, or 50Ω.

Additional measurements for the Scope mode
TRIG to left Measure the time difference between the

trigger occurrence and the left cursor.
TRIG to right Measure the time difference between the

trigger occurrence and the right cursor.
V at left Measure the voltage amplitude where the left

cursor crosses the waveform.
V at right Measure the voltage amplitude where the right

cursor crosses the waveform.
phase Measure the phase shift between two waveforms. A

maximum of three phase shift measurements between the
reference wa veform and three other waveforms are possible.

3 - 12 91/92/96/99/105 Users Manual

USING THE MEASUREMENTS MAP

The measurements can be selected in various menus. The following Measurements map shows where you can find all
measurements.

MEASURE

MENU

MAIN MENU

Voltage Measurements

V DC

• • •

Vrms AC

•• •

Vrms AC+DC

• • •

Vrms AC (No DC)

•

V DC (mean)

• •

Vrms

••

dV

• •

Vpeak/peak

••

V max peak

• •

V min peak

••

V at left

•

V at right

•

ACCESSORY (mV)

• •

Frequency Measurements

Hz (frequency)

• • • •

duty cycle

•• •

RPM 1

• • •

RPM 2

•• •

Making Measurements 3 - 13

Power Measurements

dBV DC

• • •

dBV AC

•• •

dBV AC+DC

• •

dBV AC (no DC)

•

dBm DC

• • •

dBm AC

•• •

dBm AC+DC

• •

dBm AC (no DC)

•

dBW DC

• • •

dBW AC

•• •

dBW AC+DC

• •

dBW AC (no DC)

•

WATT DC

• • •

WATT AC

•• •

WATT AC+DC

• •

WATT AC (no DC)

•

Time Measurements

pulse width

•• •

dt

• •

1/dt

••

rise time

• •

TRIG to left

•

TRIG to right

•

phase

•

MEASURE

MENU

MAIN MENU

3 - 14 91/92/96/99/105 Users Manual

Ampere Measurements

A DC

•• •

A AC

• • •

A AC+DC

•• •

A AC (no DC)

•

Temperature Measurements

°

C

•

°

F

•

Resistance Measurements

Ohm

••

Continuity

• •

Diode Measurements

Diode

• •

MEASURE

MENU

MAIN MENU

MAKING CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . 4-2

SELECTING A MAIN MODE . . . . . . . . . . . . . . . . . . . . 4-3

SELECTING RANGES

(MANUAL/AUTO RANGE) . . . . . . . . . . . . . . . . . . . . . 4-7

HOLDING A STABLE
MEASUREMENT (TOUCH HOLD



) . . . . . . . . . . . . . . 4-8

DISPLAYING MINIMUM AND MAXIMUM

READINGS WITH RELATED TRENDPLOT . . . . . . . . 4-9

Displaying a Min Max Record . . . . . . . . . . . . . . . . 4-9

Displaying the Min Max TrendPlot™ . . . . . . . . . . . 4-9

Freezing the Display . . . . . . . . . . . . . . . . . . . . . . 4-10

SELECTING THE SCOPEMETER KEY SUBMENU 4-11

Enabling and Disabling the

Change Alert™ Function . . . . . . . . . . . . . . . . . . . 4-11

Changing the Refresh Rate of the Display . . . . . . 4-11

MAKING MEASUREMENTS

IN METER AND EXT.mV MODE . . . . . . . . . . . . . . . 4-12

Changing the number of readings . . . . . . . . . . . . 4-12

TAKING RELATIVE READINGS (SCALING) . . . . . 4-12

Readings Relative to a Reference Point (Zero

∆

) 4-12
Readings as a Percent Change from
Reference Point (Zero %

∆

) . . . . . . . . . . . . . . . . . 4-13

Readings Displayed as a Percent

of Scale (0%-100%) . . . . . . . . . . . . . . . . . . . . . . 4-13

Stop Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Readings Relative to a Minimum or
Maximum Value (Min Max Zero

∆

) . . . . . . . . . . . 4-14

Scaling Using Minimum and Maximum Readings 4-15

Chapter 4

Using the Dual Display Mode Functions

4 - 2 91/92/96/99/105 Users Manual

MAKING CONNECTIONS

ScopeMeter test tool measurement connections are illus­trated in Figure 4-1.

Use the red INPUT A BNC jack for Scope and Meter
modes. Use the grey INPUT B BNC jack as a second input
for Scope measurements . The red and black 4-mm
banana jacks are used for , , and modes.

For low frequency measurements (up to about 2 MHz),
ground can be connected to the black 4-mm banana jack.
For higher frequencies you must use the HF Adapter or
Mini Testhook on the probe.

When you use the PM8918 probe, select the 10:1 probe
type for correct decimal readout.

Figure 4-1 Measurement Connections

91

91

Scope only

Using the Dual Display Mode Functions 4 - 3

SELECTING A MAIN MODE

At power-on, the main menu at the bottom of the display is
always shown. To get the main menu from another menu or
screen, press .

Choose a main mode with any of the function keys:

, , , , or .

The measuring result is then displayed.

INPUT A and INPUT B are used to
measure the signal wavefor ms. You can set the amplitude
of both waveforms, time base speed, and trigger ing for an
optimum trace display. See Chapter 5 for more information
about SCOPE mode.

Signals supplied to INPUT A are measured.
Two measurement results appear initially on the display in
a 3 2/3-digit numeric display. At the same time you find the
graphic representation of the wav ef orm in the lower displa y.

You can select the type and number of readings in the
MORE METER window; press and to open the
window.

Main menu

91

4 - 4 91/92/96/99/105 Users Manual

If necessary, you can select the range of both the scope
trace and meter display, and the time base speed.

•

Press to select the desired attenuation.
Ranges are from 1V to 3 kV (Vrms: 2.5 kV) with 10:1
probe, or from 100 mV to 300V (Vrms: 250V) with direct
1:1 input.

•

Press to select the desired time base; ranges
are from 1 µs to 100 ms/div.

Resistance mode. A resistor connected to the red
and black 4-mm banana jack inputs is measured. The red
banana jack is the high input, and the black banana jack
(COM) is the low. The time base is fixed at 5 ms/DIV.

NOTE

In the diode and resistance modes, the black COMmon
banana jack is not connected internally to the common of
BNC INPUTS A and B.

Using the Dual Display Mode Functions 4 - 5

The measurement result is displayed as a 3 2/3-digit
display. The ranges are 30Ω (manual only), 300Ω, 3 kΩ,
30 kΩ, 300 kΩ, 3 MΩ, and 30 MΩ. A beeper alert is
generated at <5% of a selected range in Manual Range
mode. The beeper alert is turned on with ALERT ))).

Diode test mode. A diode connected to the red
and black 4-mm banana jack inputs is tested. The
measurement current through the diode is 0.5 mA. The red
banana jack is the high input, and the black banana jack
(COM) is the low.

The result is displayed as the forward or reverse voltage of
the diode. A beeper alert is generated at forward voltage.
The beeper alert is turned on with ALERT ))).

The time base is fixed at 5 ms/DIV and the attenuator at 3V.

NOTE

In the diode and resistance modes, the black COMmon
banana jack is not connected internally to the common of
BNC INPUTS A and B.

4 - 6 91/92/96/99/105 Users Manual

EXTernal milliVolt function. Signals supplied
to the red and black 4-mm banana jack inputs are
measured. The red banana jack is the high input, and the
black banana jack (COM) is the low. The ranges are
300 mV, and 3V. Time base ranges are from 1 µs to
100 ms/div.

Use this mode for low voltages and for the accessories
available for the ScopeMeter test tool.

Using the Dual Display Mode Functions 4 - 7

SELECTING RANGES
(MANUAL/AUTO RANGE)

In manual range, the input attenuator range can be
changed by pressing the INPUT A key or

, when these are assigned to . If in auto
range, this switches automatically to manual range, and
MANUAL appears in the top right of the display. The
selected attenuator and time base ranges are shown on
the display.

The desired time base range can be selected by pressing

.

Auto ranging (automatic setting of the attenuator and time
base) is selected when you press .

4 - 8 91/92/96/99/105 Users Manual

HOLDING A STABLE MEASUREMENT
(TOUCH HOLD



)

The Touch Hold function captures the next stable
measurement and a beep indicates that a stable
measurement has been made. When the Touch Hold
function is turned on, the numeric display is frozen (held)
until a stable measurement is detected. Stable
measurements are defined as:

•

Within +/-100 display counts for 1s.

•

Above 200 display counts for dc signals.

•

Above 300 display counts for ac signals.

•

Below overload (OL) in Ω and diode test.

TOUCH HOLD appears in the top right of the display when
the function is active.

NOTE

The Touch Hold function is not available in Min Max.

Figure 4-2 The Touch Hold function

The following procedure can be used for Touch Hold:

1. Press and measure the signal.

2. Wait until the ScopeMeter test tool produces a beeper
signal to indicate a stable signal.

3. Remove the measuring leads and read the result from
the display.

4. Measure a new signal, wait for the beeper, remove the
leads, and read again.

5. Press to return to normal measurement mode.

Using the Dual Display Mode Functions 4 - 9

DISPLAYING MINIMUM AND MAXIMUM
READINGS WITH RELATED TRENDPLOT

Displaying a Min Max Record

Press to record the maximum (MAX), average (AVG),
minimum (MIN), and difference (MAX-MIN) readings of the
main (upper displayed) measurement. The test tool also
continues to display the present reading. Time stamps
appear next to the MAX, AVG, and MIN readings to show
the elapsed time in hours, minutes, and seconds since the
Min Max start to the most recent change in the respective
reading. The AVG time stamp updates continuously. The
MAX and MIN time stamps update only when new high or
low readings are encountered.

NOTE

A beep occurs when a new MAX or MIN value is detected.
New MIN, MAX, and AVG readings are then updated on
the display.

Displaying the Min Max TrendPlot™

The test tool also continuously logs the maximum, aver age ,
and minimum readings to memory and displays all three as
graphs. Vertical scaling and horizontal time compression
are automatically resized to fit the TrendPlot on the display.
The TrendPlot is slowly traced on the display from left to
right until the screen is written and the time scale is
resized. The initial time scale is 15s/DIV; after a full screen
the scale is compressed to 30s, 1 min, 2 min, etc, to a
maximum of 40 days over a whole display.

4 - 10 91/92/96/99/105 Users Manual

ATTENTION

An overload of MAX or MIN will stop the Min Max
record mode. The overloaded value (MAX or MIN) and
the AVG are then displayed in reverse video, and the
time stamp of the overloaded value is stopped. The
TrendPlot will continue.

Freezing the Display

You can press at any time to freeze the displayed
readings. HOLD appears in the top right of the display.
Press a second time to resume the display updates.

Turn Min Max off again with one of the following actions:

•

Press a second time.

•

Press .

•

Select a new measurement.

Using the Dual Display Mode Functions 4 - 11

SELECTING THE SCOPEMETER KEY
SUBMENU

From any main mode, you can access the main mode sub­menu by pressing for more control over the selected
mode. Figure 4-3 shows the METER mode submenu.

Figure 4-3 METER Mode Submenus

In , , , and modes you can choose the
functions ALERT ))), Zero ∆, FAST/SMOOTH, and RESET
READING directly with one of the function keys. Or you can
find these functions in the Submenu MORE window. For
more information about the SCOPE submenu, see
Chapter 5.

The Submenu MORE window also offers advanced
measurement adaptations, such as Scaling and Value
Result. To open the window, press . Make your
selections and press (CLOSE) to close the window.

Figure 4-4 More Meter Mode

Enabling and Disabling the Change Alert™ Function

Press to enable an audible alert signal. The test tool
draws your attention with a beep when the measurement
changes more than 100 digits. In Ω mode the alert warns
you when the measurement falls to less than 5% of the
measurement range.

Changing the Refresh Rate of the Display

Select (FAST) to speed up the refresh rate in the
measurement result display. A fast refresh rate is useful
when you are making adjustments and must see the
resulting reading as quickly as possible.
Select (SMOOTH) to average readings over the last
measurements (8 seconds at 5 ms/div). It reduces the
influence of noise or unstable input signals.
Select (no highlight) to get the normal readings.

4 - 12 91/92/96/99/105 Users Manual

MAKING MEASUREMENTS IN METER AND
EXT.mV MODE

In Meter and EXT.mV mode you can make the same
measurements as found in the Measure Menu. To find
these measurements, select ADD MAIN READING in the
Submenu MORE window. This opens a list of all possible
measurements. For more details of the measurements, see
Chapter 3.

An easy way to return to the factory default readings of the
active main mode is to press (RESET READING)
from the Submenu.

Changing the number of readings

At the factory default setting the ScopeMeter test tool
displays a combined numeric reading result and a
wavefor m. You can customize the number of readings on
the display from one to a maximum of four. On page 2 of
the More window, highlight READINGS ON DISPLAY,
select the new number 1, 2, 3, or 4, and press to
select. Then press to remove the window again. In
and modes the maximum number of readings is two.

TAKING RELATIVE READINGS (SCALING)

Scale Main Reading displays the present measurement
result with respect to a defined range. From a Submenu,
press to open a MORE functions window. Next, use

or to highlight SCALE READING. When you
press , a list box appears on the display to select the
scaling function: off, ZERO ∆ (see ), ZERO %∆, and
0%-100%. Highlight a scaling function, and press to
select.

Figure 4-5 Scaling Functions

Readings Relative to a Reference Point (Zero ∆)

Select "ZERO ∆" to set the present upper reading as the
zero reference point. Subsequent readings are displayed
as units of variation from this point. This feature is useful
when you need to monitor input activity in relation to a
known good value. The z ero function can also be used with
dBV, dBm, or dBW.

You can also activate this function from the Submenu, and
then press .

Using the Dual Display Mode Functions 4 - 13

Readings as a Percent Change from Reference Point
(Zero %∆)

Select "ZERO %∆" to set the present upper reading as the
relative reference. Subsequent readings are displayed as a
percentage of variation (delta) from this point.
The figure below shows percentage change (tolerance)
when measuring a resistor:

Readings Displayed as a Percent of Scale (0%-100%)

Scaling starts automatically when both 0% and 100%
values have been entered as the scaled reference values.
Use the following procedure (example for Meter mode):

1. From the SCALE READING list box, highlight 0%-100%
and press .

2. Use

to highlight REFERENCE 100% and

press .

3. Measure the value that will represent 100%.

4. Highlight NOW (as the present 100% value) and press

to save the displayed value as 100%.

5. Repeat actions 2 to 4 for the 0% value.

6. Press (CLOSE) to activate scaling and remove
the window.

The present measurement result with respect to the
defined range with a 0% and 100% value appears now as a
scaled % readout.

4 - 14 91/92/96/99/105 Users Manual

A typical scaling display is shown in the figure below: Stop Scaling

To stop scaling do one of the following:

•

Choose another function.

•

Highlight SCALE READING in the More window, press

, highlight "off", and press .

Readings Relative to a Minimum or Maximum Value
(Min Max Zero ∆)

Min Max Zero ∆ views the relative readings in units appro­priate for the function and range selected. When in Min
Max recording mode, set the test tool as follows:

1. From a Submenu, press (ZERO ∆).
Now the reading relative to the main value appears on the

display.

NOTE

In this example the Meter Min Max Zero is used.

Using the Dual Display Mode Functions 4 - 15

NOTE

Scaling and Zero ∆ selections are mutually exclusive;
selecting one deactivates the other.

Scaling Using Minimum and Maximum Readings

The MORE window also gives you access to a scaling
function when the ScopeMeter test tool is in Min Max

recording mode. First press to activate Min Max
recording. Next, from a Submenu MORE window, use

or to highlight SCALE READING. Then press
to open the Scale list box.

NOTE

In this example the Ohm Min Max Scaling is used.

Figure 4-6 Min Max Scaling Functions

Min Max Scaling views the readings as relative percentage
values. For example, you can determine how the existing
reading relates as a percentage of a range defined by two
of the following settings: MIN, MAX, MAX-MIN, and AVG.
You would accomplish this from the Scale Reading list box
as follows:

1. Use

to highlight 0%-100% and press .

2. Use

to highlight REFERENCE 100% and

press .

3. Measure the signal. The maximum value represents the
100% value.

4. Highlight MAX and press to set the recorded
maximum value as 100% reference.

4 - 16 91/92/96/99/105 Users Manual

5. Use

to highlight REFERENCE 0% and

press .

6. Measure the signal. The minimum value represents the
0% value.

7. Highlight MIN and press to set the recorded
minimum value as 0% reference.

8. Press (CLOSE) to remove the window.

The Min Max Scaling is automatically activated.
Since these entries set up a valid range, the ScopeMeter

test tool begins scaling with a display similar to the one in
the following figure:

MAKING CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . 5-2

MAKING AN EASY SETUP . . . . . . . . . . . . . . . . . . . . 5-3

CONTROLLING INPUTS A AND B . . . . . . . . . . . . . . 5-3

Selecting the Input . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Selecting the Input Coupling . . . . . . . . . . . . . . . . . 5-3

Capturing Glitches . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Reversing the Polarity of the Displayed Waveform 5-4

ADJUSTING THE AMPLITUDE . . . . . . . . . . . . . . . . . 5-4

ADJUSTING THE TIME BASE . . . . . . . . . . . . . . . . . . 5-5

POSITIONING THE WAVEFORM ON THE DISPLAY 5-6

ACQUIRING WAVEFORMS . . . . . . . . . . . . . . . . . . . . 5-7

Choosing Recurrent or Single Acquisition . . . . . . . 5-7

Roll Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Using "Zoom" to Increase or

Decrease Time Resolution . . . . . . . . . . . . . . . . . . . 5-8

SELECTING THE SCOPE SUBMENU . . . . . . . . . . . . 5-9

Capturing 10 or 20 Divisions . . . . . . . . . . . . . . . . . 5-9

Smoothing the Waveform (Average) . . . . . . . . . . 5-10

TRIGGERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

Trigger Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

Selecting a Trigger Source . . . . . . . . . . . . . . . . . 5-12

Defining the Trace Start . . . . . . . . . . . . . . . . . . . 5-12

Selecting a Trigger Slope . . . . . . . . . . . . . . . . . . 5-12

Selecting a Trigger Level . . . . . . . . . . . . . . . . . . 5-13

Selecting Auto Level . . . . . . . . . . . . . . . . . . . . . . 5-13

Choosing a Trigger Delay . . . . . . . . . . . . . . . . . . 5-13

DISPLAYING THE MINIMUM

AND MAXIMUM OF A WAVEFORM . . . . . . . . . . . . 5-14

MAKING COMBINATIONS

WITH INPUT A AND INPUT B . . . . . . . . . . . . . . . . . 5-15

DISPLAYING MULTIPLE WAVEFORMS . . . . . . . . 5-15

ADAPTING THE DISPLAY . . . . . . . . . . . . . . . . . . . 5-16

Selecting a Dot Size . . . . . . . . . . . . . . . . . . . . . . 5-16

Selecting a Display Grid . . . . . . . . . . . . . . . . . . . 5-16

Adjusting the Trace Quality . . . . . . . . . . . . . . . . . 5-16

MORE INFORMATION . . . . . . . . . . . . . . . . . . . . . . . 5-17

Chapter 5

Using in Scope Mode

5 - 2 91/92/96/99/105 Users Manual

MAKING CONNECTIONS

Scope connections are illustrated in Figure 5-1.

Maximum scope inputs on either BNC are as follows:

•

Maximum input signal voltage: 300V rms direct

•

Maximum input signal voltage: 600V rms when using

10:1 probe

•

Voltage to ground: 600V rms

Input impedance is 10 MΩ/15 pF with the 10:1 probe.

•

Press and to select the Scope mode.

Figure 5-1 Scope Connections

91

91

Using the Scope Mode 5 - 3

MAKING AN EASY SETUP

Continuous Auto Set automatically selects the optimum
settings for connected input signals and keeps track of any
variation of the signal. Start Continuous Auto Set by
pressing . For most signals, the ScopeMeter test tool
will automatically set inputs, amplitudes, time base setting,
and triggering for an optimum display.

Pressing sets the following:

•

INPUT A and/or INPUT B is switched on depending on
signal input. All other waveform displays are switched off.

•

Between two and five periods of the waveform with the
lowest frequency are displayed.

•

The attenuation per input is set so that the waveform
occupies about four vertical divisions.

•

The trigger source is chosen as the input signal with the
lowest frequency.

If no triggerable waveform is found when you press ,
approximate settings are used. If the input signal
subsequently changes, the test tool readjusts itself; you will
always have a meaningful picture on the display.

Continuous Auto Set can be configured through the
Menu. Refer to Chapter 6 for a complete description.

CONTROLLING INPUTS A AND B

Press or to open the input settings menu.

Figure 5-2 Input A Menu

Selecting the Input

Press on the appropriate input to turn it on and off.

Selecting the Input Coupling

Press on the appropriate input to select the input
signal coupling. The selection is shown in the upper line of
the top displa
y. AC-coupling allows for reading ac voltages above 40 Hz
only. DC-coupling allows for reading ac and dc voltages.

The GND selection disconnects the input signal and
displays the ground or zero level as a horizontal line.
Ground provides a useful tool for setting up the display to
show a high dc level or voltage spike. For example, if you
anticipate a high positive dc level, select GND and press

to move the ground level lower on the display. A small
marker box ( ) on the right side of the display identifies the
ground level.

91

5 - 4 91/92/96/99/105 Users Manual

Capturing Glitches

Press on INPUT A to turn GLITCH DETECTion on.
This function displays the events that occur between two
samples on INPUT A. INPUT B is turned off. The events
can be glitches or other asynchronous waveforms that are
40 ns (nanoseconds) or wider.

NOTE

GLITCH detection and AVERAGE are mutually exclusive.

Reversing the Polarity of the Displayed Waveform

Press to open the MORE INPUT window. Highlight
INPUT A (or INPUT B) and press to open the list box.
You can tur n on and off an input and invert the INPUT A
and INPUT B display.

Invert reverses the polarity of the displayed waveform. This
is identified by the trace identifier on the display. For
example, a negative-going waveform would be displayed
as positive-going, providing a more meaningful viewing
perspective in some cases.

ADJUSTING THE AMPLITUDE

You can use

for INPUT A or INPUT B to
adjust input waveform attenuation. Sixteen ranges are
available. A 1:1 probe can accommodate 1 mV to a
maximum of 100V per division, and a 10:1 probe can
accommodate 10 mV to a maximum of 1 kV per division.
The amplitude can be changed in increments of 1, 2, and 5
(e.g., 100 mV, 200 mV, 500 mV). The upper row of the top
display shows the range and the type of probe for each
input.

When a 10:1 probe is used with the 10 mV or 20 mV range,
averaging is turned on automatically. (AVG 4 appears on
the display.)

91

Using the Scope Mode 5 - 5

ADJUSTING THE TIME BASE

Press to increase or decrease the number of
periods. The time base readout is on the second row of the
top display. Refer to Figure 5-3. Available settings depend
on the acquisition mode in effect, and are as follows:

•

Recurrent 5ns (10ns)/DIV - 1s/DIV

*

•

Single 100ns/DIV - 1s/DIV

•

Roll 2s/DIV - 60s/DIV

*

Fluke 91, 92, 96 and 99 : 10ns/DIV
Fluke 105 : 5ns/DIV

The time base can be changed in increments of 1, 2, and 5
(e.g., 10 ns, 20 ns, 50 ns).

Figure 5-3 Time Base and Amplitude Adjustment

5 - 6 91/92/96/99/105 Users Manual

POSITIONING THE WAVEFORM ON THE
DISPLAY

Considerable flexibility is offered in moving the trace(s)
around the display. and reposition the trace up or
down four divisions. This operation can be done separately
for each input. The key simultaneously
repositions all traces left or right from -4 to +16.5 divisions.
Waveform positioning is demonstrated in Figure 5-4.

Figure 5-4 Positioning the Waveform

Using the Scope Mode 5 - 7

ACQUIRING WAVEFORMS

Choosing Recurrent or Single Acquisition

You can instr uct the ScopeMeter test tool to continuously
update its display, giving you a dynamic look at waveform
activity as it occurs (RECURRENT). You can also tell the
test tool to update its display only once, yielding a snapshot
record of waveform activity (SINGLE), termed "Single­Shot" elsewhere in this manual.

From the Scope Submenu, press to highlight
RECURRENT for continuous display updates. Pressing

stops and starts an acquisition. A HOLD on the top
right of the display indicates that acquisition is stopped.
The time base range is 5ns (10ns)/DIV to 1s/DIV.

Set up the ScopeMeter test tool for "Single-Shot" acquisi­tions with the following procedure:

1. Press to select SINGLE (highlighted).

NO TRIG begins flashing on the display. The instrument
is waiting for a trigger.

RUN appears on the display when the single acquisi­tion is triggered. HOLD then reappears when acquisi­tion is completed.

2. Now press again and wait for another single

acquisition trigger.

The time base range is 100ns/DIV to 1s/DIV.

Roll Mode

Roll mode supplies a visual log of waveform activity and is
especially useful when measuring lower frequency
waveforms. To enter the Roll mode, press to select
RECURRENT, then press to select 2s/DIV, 5s/DIV,
10s/DIV, 20s/DIV, or 60s/DIV.

The wavefor m is now slowly traced on the display from left
to right until the full screen is written. Then the trace slowly
shifts from right to left like a pen-recorder. The Roll mode is
automatically turned off if a time base of 1s/DIV or faster is
selected.

Roll is an untriggered mode. The Capture length and
Single-Shot functions are not available. However, the
wavefor m can be frozen on the display by pressing .

5 - 8 91/92/96/99/105 Users Manual

Using "Zoom" to Increase or Decrease Time Resolution

Zoom displays a waveform with increased time resolution,
giving up to 1000x magnification. Use the following
procedure to Zoom in a waveform:

1. Press

2. Use the and keys to highlight "scope
zoom".

3. Press to select. appears in the right
bottom of the display.

4. Press to enlarge the waveform (speed up the
time base) or press to shrink the wavefor m (slow
down the time base).

The ScopeMeter test tool zooms in and out one step at a
time and, if necessary, the trigger delay is recalculated.
The focal point for this activity is waveform activity at the
fourth time division. The zoom feature is useful as a quick
examination of a live waveform. Zoom cannot be used on
saved waveforms recalled from memory or when the
waveform is frozen (HOLD).

Figure 5-5 Zoom in a Waveform

Using the Scope Mode 5 - 9

SELECTING THE SCOPE SUBMENU

From the Scope mode, press to open the Scope
mode submenu. This gives you more control over the
Scope mode. Figure 5-6 shows the Scope Submenu.

Figure 5-6 Scope Submenu

Refer to Chapter 6 for descriptions of the (ZERO

∆

)

and (CURSOR READING) function key.
The MORE Scope window gives you access to all control

over the Scope mode. In addition to the functions shown in
Figure 5-6, you will also find functions, such as Capture
Length, Average Waveforms, and Scope measurements.
To use these functions, press to open the MORE
SCOPE window.

Figure 5-7 More Scope Window

Capturing 10 or 20 Divisions

This enables you to capture either 10 or 20 divisions of
waveform detail.
Selecting 10 divisions, or one full screen, is sufficient for
most applications.
For fast single shots, selecting 20 divisions enables you to
capture more information, but on slow waveforms it lowers
the screen update speed by a factor of 2. Now you can use

to move the acquired waveform right and left

across the display.

Figure 5-8 Capture length

5 - 10 91/92/96/99/105 Users Manual

Smoothing the Waveform (Average)

The test tool can average multiple samples of a waveform,
allowing for noise suppression without loss of bandwidth.
To select average in the Scope mode, do the following:

1. From the More Scope window, highlight AVERAGE
WAVEFORMS.

2. Press to open the list box.

3. Use to choose the number of waveforms to
average for each display update. The maximum number
is 256.

4. Press to select.

5. Press (CLOSE) to close the window.

To turn off averaging, set AVERAGE WAVEFORMS to be
off again.

NOTE

AVERAGE WAVEFORMS: OFF changes to AVERAGE
WAVEFORMS: by 4 in the 10 mV and 20 mV attenuator

ranges when a 10:1 probe is used. Averaging and Glitch
detect (on INPUT A) are mutually exclusive.

Additional information about smoothing appears in Chapter 6.
Waveform samples with and without averaging are shown
in Figure 5-9.

Figure 5-9 Averaging

Using the Scope Mode 5 - 11

TRIGGERING

Trigger Basics

Triggering tells the ScopeMeter test tool when to begin
displaying the waveform. You can select which input signal
should be used as the source, on which edge this should
occur, and at what waveform level it should occur. Finally,
you can tell the test tool to delay the waveform to be
displayed with a specified time delay, number of cycles, or
number of events.

The second top row on the display identifies the trigger
parameters being used. Trigger icons on the display
indicate the position of the trigger delay and the trigger
level. Refer to Figure 5-10.

For example,
20 ms/DIV TRIG:A +120EVT -5DIV
means that INPUT A is used as the trigger source with a

positive slope. The amount of trigger delay in time divisions
is -5, and that the amount of trigger delay in ev ents is +120.

Figure 5-10 Display with All Trigger Information

5 - 12 91/92/96/99/105 Users Manual

•

Press to open the Trigger menu.

Figure 5-11 Trigger Menu

Selecting a Trigger Source

Press to enter the MORE TRIGGER window, then
highlight TRIGGER SOURCE and press to open the
list box. Select one of the following trigger sources:
INPUTA, INPUT B , EXTERN 2V (via external trigger
input), EXTERN 0.2V (via external trigger input), or
GENERATOR (via internal waveform
generator).

NOTE

You can also find the trigger source selection under the
appropriate INPUT A or INPUT B More window.

•

EXTERN 2V or EXTERN 0.2V are available as trigger
source selections. You can connect an external trigger
at the red 4-mm banana jack or use the PM9081
Banana-to-BNC adapter supplied. Make your selection
for the appropriate TTL-compatible (Transistor-to­Transistor Logic) trigger level (0.2V or 2V).

91

91 92 96

•

GENERATOR

. See Chapter 6 for more

information.

NOTE

EXTERN and GENERATOR are mutually exclusive;
selecting one deactivates the other.

Defining the Trace Star t

Highlight TRACE START and press to open the list
box.
When Wa it f or t rig ger is selected, the test tool needs a
trigger to display a waveform.
When free run is selected, and if no trigger is detected for
100 ms, the test tool provides its own trigger and the trace
still appears on the display. Use this mode for a continuous
display of a waveform.

Selecting a Trigger Slope

From the Trigger menu, press to select trigger ing on
either the +SLOPE or -SLOPE of the chosen input.

91

92 96

Using the Scope Mode 5 - 13

Selecting a Trigger Level

Press to open the ADJUST LEVEL box. If you have
selected INPUT A or INPUT B as the trigger source, you
can use and to adjust the trigger level
continuously. Observe the level changes in the display.
Press to select.

The trigger level is identified by the trigger icon (e.g., )
on the left of the display.

Selecting Auto Level

Press to find the optimal trigger level for the source
waveform voltage.

Choosing a Trigger Delay

You can also begin to display the wavefor m at some time
before or after the trigger point is detected. This is
identified by the delay icon "T" on the top of the display.

From the second page of the MORE TRIGGER window,
select RESET DELAY to reset all the selected trigger
delays to their initial values (TIME DELAY : -2, TRIGGER
SPECIAL DELAY: OFF).

Types of trigger delays are discussed below. In many
instances, you can select more than one type of delay.

Press to enter the Time Delay list box. Use or

to set the trigger time delay in increments of the
existing time base divisions. The range of divisions is -20 to
+640. For example, if the time base is set to 2ms/DIV, +16
defines a delay of 16 time divisions (32 milliseconds) after
the trigger is detected. Press to select.

From the second page of the MORE TRIGGER window,
select TRIGGER SPECIAL DELAY (off, Events, or
N-Cycle).

N-CYCLE The trigger waveform is divided by the
number of cycles "N" to create a stable picture for
waveforms with a cyclic character. (N-CYCLE can be used
only on INPUT A.) Use or to select the number
of cycles. A total of +2 to +255 cycles can be selected.

EVENTS Triggering via the external input is delayed
for a number of e v ents that occur on INPUT A. Use or

to select the number of events (+1 to +1023).
External trigger star ts the delay, and after the number of
events on INPUT A is equal to the selected number, the
test tool acquires the INPUT A signal.

5 - 14 91/92/96/99/105 Users Manual

DISPLAYING THE MINIMUM AND MAXIMUM
OF A WAVEFORM

The ScopeMeter test tool records the envelopes (minimum
and maximum values) of the live waveforms A and B and
A±B. (INPUT B not in FLUKE 91).

Press to activate the Min Max envelope mode.
MIN MAX now appears on the top right of the display.

The minimum and maximum values are automatically
saved in waveform memories. The display shows the
resultant envelope in lower intensity (grey) together with
the actual waveform. Any change in attenuation or time
base will restart a new Min Max envelope action.
The function is turned off with one of the following actions:

•

Press a second time.

•

Press .

You can use Min Max envelope to observe variations in
time or amplitude of input signals over a longer period of
time.

Using the Scope Mode 5 - 15

MAKING COMBINATIONS WITH INPUT A
AND INPUT B

Press on INPUT B to select A+B to show INPUTS A
and B added together or to select A-B to show INPUT B
subtracted from INPUT A.

You can also choose A+B and A-B from the MORE INPUT
A or MORE INPUT B window. Highlight COMBINE A & B,
and press to open the list box. You can also select
A versus B to provide a plot with INPUT A on the vertical
axis and INPUT B on the horizontal axis. Press to
activate your selection.

DISPLAYING MULTIPLE WAVEFORMS

By displaying a combination of live and recalled w a v ef orms,
the test tool can display a maximum of four waveforms
simultaneously. For example, INPUTS A, B, A+B, and
waveforms recalled from memor y could be displayed. You
can display any combination of four waveforms.

If you attempt to display a fifth w aveform, a message on the
display lets you know that you exceeded the maximum
number of four waveforms.

NOTE

The A versus B display is not counted in the four-trace
maximum.

91

5 - 16 91/92/96/99/105 Users Manual

ADAPTING THE DISPLAY

You can adapt the display to your preference as follows:

1. Press .

2. Press to open the Display Menu window.

Selecting a Dot Size

3. Use to highlight DOT SIZE and press
to open the list box.

4. Choose a dotsize: SMALL, MEDIUM, or LARGE and
press to select. This selects the trace to be
single, double, or triple width.

Selecting a Display Grid

5. Use to highlight SCOPE GRID and press

to open the list box.

6. Use to choose between FULL, QUAD­RANT, or BORDER. Press to select any of the
three.

BORDER provides time and amplitude division marks
around the display.
QUADRANT adds horizontal and vertical division points as
added reference points to the border display.

FULL adds a crosshatch pattern based on the horizontal
time and vertical amplitude divisions on the display.

Figure 5-12 Grid Selection

Adjusting the Trace Quality

7. Use to highlight PERSISTENCE, and press
to open the list box.

Persistence improves the trace quality when you measure
on complex waveforms. Choose one of the five persistence
states: short, normal, medium, high, or infinite to obtain
the best image on the display. Press to select. Initially
the ScopeMeter test tool is set to normal persistence.

NOTE

Contrast and Persistence work interactively. So when you
readjust persistence, it may be necessary to choose
another contrast again.

Using the Scope Mode 5 - 17

In the DISPLAY window you can also choose the DOT
JOIN function, which either shows the individual measure­ment samples or joins them together to give a continuous
trace.
DISPLAY MODE allows you to select normal or reverse
video.

8. Press (CLOSE) to remove the window. The test

tool displays the USER OPTIONS menu again.

MORE INFORMATION

Chapter 8 (ScopeMeter Test Tool Tutorial) presents Scope
mode applications that use many of the features discussed
in this chapter. Refer to Chapter 6 for a discussion of
additional capabilities.

MAKING MEASUREMENTS USING THE CURSORS 6-2

Using the Markers . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Adding a Cursor Main Reading . . . . . . . . . . . . . . . 6-4

DELETING MEMORIES . . . . . . . . . . . . . . . . . . . . . . . 6-6

SAVING TO MEMORY . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Saving a Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Saving Acquired Waveforms . . . . . . . . . . . . . . . . . 6-7

Saving a Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Copying Waveforms or Settings . . . . . . . . . . . . . . . 6-8

RECALLING FROM MEMORY . . . . . . . . . . . . . . . . . . 6-8

Recalling a Screen . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Recalling a Waveform . . . . . . . . . . . . . . . . . . . . . . 6-9

Recalling a Setup Configuration . . . . . . . . . . . . . . 6-10

USING WAVEFORM MATH FUNCTIONS . . . . . . . . 6-11

Scaling the Display . . . . . . . . . . . . . . . . . . . . . . . . 6-11

Choosing a Math Operation . . . . . . . . . . . . . . . . . 6-11

USING A PRINTER . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

Connecting to a Printer . . . . . . . . . . . . . . . . . . . . 6-14

Setting Print Parameters . . . . . . . . . . . . . . . . . . . 6-14

Selecting Printer Types . . . . . . . . . . . . . . . . . . . . 6-14

Selecting Print Options . . . . . . . . . . . . . . . . . . . . 6-14

Printing Grey in White or Black . . . . . . . . . . . . . . 6-16

Sending to a Printer . . . . . . . . . . . . . . . . . . . . . . 6-16

USING THE WAVEFORM GENERATOR . . . . . . . . 6-17

TESTING COMPONENTS . . . . . . . . . . . . . . . . . . . . 6-17

CHANGING THE RESET CONFIGURATIONS . . . . 6-19

ALTERING THE CONTINUOUS

AUTO SET CONFIGURATION . . . . . . . . . . . . . . . . 6-20

Using Manual Override . . . . . . . . . . . . . . . . . . . . 6-20

Changing Continuous Auto Set Options . . . . . . . 6-20

Chapter 6

Using Additional Capabilities

6 - 2 91/92/96/99/105 Users Manual

MAKING MEASUREMENTS USING THE
CURSORS

The Cursors allow you to make precise digital
measurements of waveform activity between measurement
areas. This can be done on live waveforms and on saved
waveforms.

•

From Scope mode, press to turn on (and
off) the cursor readings.

Active cursors appear on the display as two ver tical and
two horizontal lines.

The intersection of vertical and horizontal lines of the left
cursor marks a point on the wavefor m. The intersection of
vertical and horizontal lines of the right cursor marks
another point on the waveform. The measurement takes
place between these two points.

Use and to move the left and right cur­sors which designates the area for the cursor measure­ment.

NOTE

You can also find many cursor measurements when using the

key. These measurements are explained in Chapter 3.

91

92

Using Additional Capabilities 6 - 3

When the cursor readings are turned on, you can choose
one or more measurements as follows:

1. From Scope mode, press to open to the
More Scope window.

2. From the second screen page of the More Scope win­dow, highlight ADD MAIN READING. Press to
open the list box. The ADD MAIN READING list box
allows you to choose which cursor measurement read­ing to display. A list of possible measurements is shown
in Figure 6-1.

Figure 6-1 Cursor Measurements Window

3. Choose the type of Scaling Reading: off, ZERO

∆

, or %

off displays the measurement results in normal

values.

ZERO

∆

displays a change to the reference value.

% displays a change to the reference value as

a percentage.

4. Choose the waveform source with Measure on Wave­form. The source selection is determined by active dis­play traces. The traces can be obtained from the active
display (A, B, A±B) or from waveform memory.

5. Choose the number of Readings; the test tool can
display up to five cursor readings at the same time.
When you choose another main readings, all readings
will shift down one, and your last chosen measurement
is placed on top. Notice that the bottom reading is then
removed from the display.

Using the Markers

Use the marker to identify the point on the waveform that a
measurement has occurred or is expected to occur. The
marker appears on the waveform as an "X".

6. From the third screen page of the More Scope window,
press to open the Markers list box. A list box of
markers in use is shown in Figure 6-2. Use or

to choose the marker. Press to select.

Figure 6-2 Markers List Box

6 - 4 91/92/96/99/105 Users Manual

In this example, the markers are defining sample points for
measuring frequency.

NOTE

Markers may be easier to see when you press and
freeze the waveform.

7. Press to close the window.

Adding a Cursor Main Reading

From the ADD MAIN READING list box, use or
to highlight the reading to display, then press to
select. Repeat this for more readings.

In making cursor measurement calculations, the ScopeMe­ter test tool uses waveform activity between the cursors.

Figure 6-3 Cursor Main Readings List Box

The measurement results are displayed in the bottom dis­play area. A maximum of five measur ing functions can be
turned on at the same time.

•

dV (for delta volts) Measures the voltage difference
between the cursors.

•

dt (for delta time) Measures the time difference
between the cursors.

•

1/dt (for relative frequency) Shows the reciprocal value
of dt.

Using Additional Capabilities 6 - 5

•

TRIG to left Measures the time difference between the
trigger occurrence and the left cursor.

•

TRIG to right Measures the time difference between
the trigger occurrence and the right cursor.

•

V at left Measures the voltage amplitude where the left
cursor crosses the waveform.

•

V at right Measures the voltage amplitude where the
right cursor crosses the waveform.

•

Vrms Measures the Root Mean Square (rms) voltage
between the cursors.

•

V DC (mean) Measures the MEAN (average of read­ings) value of waveform between the cursors.

•

Vpeak/peak Measures the PEAK to PEAK value of the
waveform between the cursors.

•

Vmax peak Measures the maximum peak value of the
waveform between the cursors.

•

Vmin peak Measures the minimum peak value of the
waveform between the cursors.

•

frequency Measures the frequency of the waveform
between the cursors. At least 1

1

/2 cycles of this wave­form must occur between the cursors. You can scroll a
waveform through the cursors by pressing .
Read the frequency change in the bottom display.

•

rise time Measures the rise time between 10% and
90% points of the waveform. The 0% and 100% points
are determined by the intersection of the wavefor m and
the cursors. Set the rising slope to at least four time
divisions for a precise measurement.

•

phase Measures the phase shift between two
waveforms. You can select upto three waveforms for
phase measurements to a reference waveform as
selected with Measure on Waveform.

6 - 6 91/92/96/99/105 Users Manual

DELETING MEMORIES

Open the Delete Menu at any time by pressing and

.

Figure 6-4 Delete Memory List Box

You can now delete all memories or selected memories
(Screen memories, Waveform memories, or Setup
memories). A message appears prompting you to confirm
that you want to delete all memory.

CA UTION

A Master Reset destroys all memory contents and
leaves initial setup with its default settings. Refer to
"Master Reset configuration" further on in this chapter
for a complete discussion of Initial Setup.

You can also delete a single memor y location. From the
More Save window, first choose the type of memory
(DELETE what?) you want to delete: Screen, Waveform, or
Setup memory. Press (SELECT ITEM) to open a list
box and choose the memory location you want to delete.
Use or to highlight the memory number. Press

to delete the selected memory location.

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Using Additional Capabilities 6 - 7

SAVING TO MEMORY

You can save screens, waveforms, and setups to memor y,
copy them between memories, and recall them from
memory. Ten nonvolatile Screen memories, 20 nonvolatile
Waveform memories, and 40 nonvolatile Setup memories
are available. (For FLUKE 96 yo u can save five nonvolatile
Screen memories, 10 nonvolatile Waveform memories, and
20 nonvolatile Setup memories).

•

Press to open the Save to Memory menu.

Saving a Screen

Use this function to save the current active display image
for future reference. You can save a maximum of
10 screens (For FLUKE 96 you can save a maximum of
five screens).

•

Press (SAVE SCREEN) to save the current
screen in memory (memory #).

The test tool automatically uses the next available memory
location. The display continues to show the actual input
waveform.

NOTE

When Medium, Long, or Infinite persistence has been cho­sen, you will only sav e the actual waveform information.

Saving Acquired Waveforms

Use this function to save acquired waveforms on INPUT A,
INPUT B, and A±B in Scope mode, needed for future mea­surements. You can save a maximum of 20 wav eforms (For
FLUKE 96 you can save a maximum of 10 waveforms).

•

Press (SAVE WAVEFORM).

The test tool starts automatically with the next available
memory locations.

Saving a Setup

Use this function to save your keystroke sequences. Once
the test tool is set up to make the required measurement,
you can save this configuration as one of a maximum of 40
setups (For FLUKE 96 you can save a maximum of 20 set­ups). A setup is simply the current operating configuration
of your ScopeMeter test tool.

•

Press (SAVE SETUP).

The test tool starts automatically with the next available
memory.

Copying Waveforms or Settings

To copy a waveform or setting from one memory to another ,

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Save menu