Hioki 9540-01 Instruction Manual

Download

Page 1

INSTRUCTION MANUA

。

For...は専用機種。複数の場合は「/」で区切る。不要の場合はとる

形名を入力。複数の場合は「/」で区切る

9540-0

品名を入力

FUNCTION UP DIS

Page 2

Page 3

Contents

Introduction iii Inspection Safety Notes Notes on Use Chapter Summary

iii iv vi xi

Chapter 1 Product Overview 1

1.1 Outline 1

1.2 Functions Added by the 9540-01 FUNCTION UP DISK 2

Chapter 2 Installation Procedure 3

2.1 Installation Procedure 3

Chapter 3 Recorder and Memory Function 5

3.1 Outline 5

3.1.1 Outline of the Recorder and Memory Function 5

3.1.2 Operation Sequence 6

3.2 Making Settings 7

3.2.1 Setting the Function Mode 7

3.2.2 Setting the Time Axis Range

3.2.3 Setting the Recording Length 10

3.2.4 Setting the Display Function 12

3.2.5 Setting the Format

3.2.6 Setting the Printer Format

3.2.7 Setting the Additional Recording Function (Recorder Waveform Only)

3.2.8 Setting the Printer Function (Recorder Waveform Only)

3.2.9 Setting the Auto Save Function 18

3.3 Setting the Trigger 20

3.3.1 Setting the Trigger 20

3.3.2 Setting the Trigger Mode 21

3.4 Settings on the Display Screen 22

3.4.1 Setting Magnification/Compression Along the Time Axis 22

13 14

16 17

3.5 Start and Stop Measurement Operation 23

3.6 Procedures for Saving Data

Page 4

Chapter 4 FFT Function 25

4.1 Outline 25

4.1.1 Outline of the FFT Function 25

4.1.2 Operation Sequence 26

4.2 Making Settings 27

4.2.1 Setting the Function Mode 27

4.2.2 Setting the FFT Channel Mode 27

4.2.3 Setting the Frequency Range 28

4.2.4 Setting the Number of FFT Points 29

4.2.5 Setting the Window Function 30

4.2.6 Setting the Display Format 32

4.2.7 Setting the Peak Display

4.2.8 Selecting Reference Data

4.2.9 Setting the FFT Analysis Mode 35

4.2.10 Setting the Analysis Channel 35

4.2.11 Setting the X-axis and Y-axis Displays 36

4.2.12 Setting the Display Scale 38

4.2.13 Octave Filter Setting 40

4.2.14 Setting the Averaging Function 41

4.2.15 Setting the Interpolation Function

4.2.16 Setting the Printer Format

4.2.17 Setting the Auto Print Function 46

4.2.18 Setting the Auto Save Function 46

4.2.19 Setting the Waveform Evaluation

4.2.20 Setting the Trigger

33 34

45 45

48 48

4.3 Analysis Function 49

4.3.1 Storage Waveform [STR] 49

4.3.2 Linear Spectrum [LIN] 50

4.3.3 RMS Spectrum [RMS] 52

4.3.4 Power Spectrum [PSP] 54

4.3.5 Auto Correlation [ACR]

4.3.6 Histogram [HIS]

4.3.7 Transfer Function [TRF] 58

4.3.8 Cross Power Spectrum [CSP] 60

4.3.9 Cross Correlation [CCR] 62

4.3.10 Unit Impulse Response [IMP] 64

4.3.11 Coherence [COH]

4.3.12 Octave Analysis [OCT] 67

56 57

Page 5

Chapter 5 Other Functions 71

5.1 Outline 71

5.2 Calculating Waveform Data 71

5.2.1 Preparing for Waveform Processing 73

5.2.2 Defining the Processing Equation

5.2.3 Copying an Equation 77

5.2.4 Setting the Channel for Recording Processing Results 78

5.2.5 Setting the Display Scale and Floating Decimal Point 79

5.2.6 Performing Waveform Processing 81

5.3 Waveform Parameter Evaluation 83

5.3.1 Making Settings for Waveform Parameter Evaluation 83

5.3.2 Executing Waveform Parameter Calculation 84

5.4 Waveform Area Evaluation 87

5.4.1 Setting the Waveform Area 89

5.4.2 Setting the Waveform Evaluation Mode 90

5.4.3 Setting the GO/NG Stop Mode 90

5.4.4 Creating the Evaluation Area 91

5.4.5 Editor Command Details 92

5.5 Memory Segmentation Function 99

5.5.1 Using the Sequential Save Function (Memory Recorder, Recorder & Memory)

100

5.5.2 Using the Multi-Block Function (Memory Recorder)

5.5.3 SAVE

5.5.4 Block Display 111

105 109

5.6 Setting the Averaging Function 112

Chapter 6 Specifications 115

6.1 8835-01 General Specifications 115

6.1.1 Basic Specifications 115

6.1.2 Recorder

6.1.3 Display

6.1.4 External Data Storage

6.1.5 Interface 118

6.1.6 Others 119

6.2 Trigger Unit 120

6.3 Memory Recorder Function 121

6.4 Recorder Function 122

117 117 118

6.5 RMS Recorder Function 123

Page 6

6.6 Recorder & Memory Function 124

6.7 FFT Function 125

6.8 Others 126

6.9 9439 DC POWER ADAPTER Specifications 128

6.10 System Operation

129

Appendix APPENDIX1

Appendix 1 Error and Warning Messages APPENDIX1

Appendix 1.1 Error Messages APPENDIX1 Appendix 1.2 Warning Messages APPENDIX2

Appendix 2 Glossary APPENDIX5 Appendix 3 Reference

Appendix 3.1 Averaging Equations APPENDIX7 Appendix 3.2 "2-point Method" Scaling Equation APPENDIX8 Appendix 3.3 Details on Operators APPENDIX9 Appendix 3.4 FFT APPENDIX12

Appendix 4 Size of a Waveform File APPENDIX21

Appendix 4.1 Binary Data APPENDIX21 Appendix 4.2 Text File APPENDIX25

APPENDIX7

Page 7

────────────────────────────────────────────────────

User’s License Agreement

Please read the following agreement carefully. This user’s license agreement (hereafter referred to as Agreement) is a legal contract between the software user (individual or institution) and HIOKI E. E. CORPORATION (hereafter referred to as HIOKI). The term "software" includes any related electronic documentation and computer software and media, as well as any printed matter (such as the Instruction Manual). By installing, reproducing, or using the software, you, the Licensee, agree to accept the license terms set forth in this Agreement.

Returning the User Registration Card

If you consent to the terms in this Agreement, please return the provided User Registration Card (postcard) to HIOKI. Only registered users will receive software support and up-to-date information services. Overseas customers do not need to return the User Registration Card, and will receive information services from their HIOKI distributor.

This software is protected by copyright laws, international copyright agreements, as well as non-corporate laws. The software is a licensed product, and is not sold to the user.

(1) License

This Agreement grants you, the Licensee, a license to install a single copy of the software on a specified computer system.

(2) Explanation of other rights and restrictions

1. Restrictions on reverse engineering, decompiling, and disassembling: You may not reverse engineer, decompile, or disassemble the software.

2. Separation of components: This software is licensed for use as a single product. You may not separate the components for use on multiple computer systems.

3. Loaning: You may not loan or lease the software.

4. Transfer of software: You may transfer full rights in accordance with this Agreement. However, if you do so, you may not retain any copy of the software, but must transfer the software in its entirety (all components, media, related documentation such as the Instruction Manual, and this Agreement), and must ensure that the receiver of the software agrees with the terms set forth in this Agreement.

5. Cancellation: In the event that the terms and conditions set forth in this Agreement are violated, HIOKI retains the right to cancel this Agreement without compromise of any of its other rights. In this event, you must destroy all copies of the software and its components.

────────────────────────────────────────────────────

Page 8

────────────────────────────────────────────────────

(3) Copyright

The title and copyright rights concerning the software’s related documentation, such as the Instruction Manual and copies of the software, are the property of HIOKI and other licensors, and are protected by copyright laws and international agreement regulations. Accordingly, you must treat the software as you would any other copyrighted document. However, you are permitted to make copies as indicated in (A) and (B) below provided such copies are not intended for use other than back-up purposes. (A) You may make a single copy of the software. (B) You may install this software on a single computer. However, you may not reproduce the documentation supplied with the software, such as the Instruction Manual.

(4) Dual media software

You may receive the same software on more than one type of media. However, regardless of the type and size of media provided, you may only use one media type and only on a single computer. You must not use or install the other media on any other computer. Furthermore, except when transferring the software as stipulated above, you may not loan, lease, or transfer the other media to any other user.

(5) Warranty

1. HIOKI reserves the right to make changes to the software specifications without any prior warning. If HIOKI releases a new version of the software, it will provide registered users with information about the revised software.

2. If the software does not operate in accordance with the supplied Instruction Manual, or the software media or Instruction Manual are damaged in any way, you have one year from the date of purchase to apply for either an exchange or repair at HIOKI’s discretion.

3. In no event will HIOKI be liable for any damages resulting from fire, earthquake, or actions of a third party under the conditions stated in item number 2 above, or for any damage caused as a result of your using the software incorrectly or under unusual circumstances. Further, the warranty is invalid if the following occurs:

・Damage incurred through transport, moving, droppage, or any other kind of

impact after you purchased the software.

・Damage incurred through any form of alteration, unwarranted servicing, or

any other type of mistreatment.

4. In the event that the software is exchanged or repaired, the period of warranty expires on the latest occurring date out of the day stated in the original warranty, and exactly 6 months from the day the exchanged/repaired software is returned to you.

5. Regardless of the grounds for making a legal claim, HIOKI and its licensors will not be liable for any damage incurred (including, but not limited to: lost profits, suspension of business, loss of data or lost savings) unstated in the warranty terms for the use of this software. This is true even if HIOKI is notified of the possibility of such damages. In any event, HIOKI’s liability shall be limited only to replacing defective software with software that is not defective

────────────────────────────────────────────────────

Page 9

iii

────────────────────────────────────────────────────

ntroduction

Thank you for purchasing this HIOKI "9540-01 FUNCTION UP DISK." To get the maximum performance from the unit, please read this manual first, and keep this at hand.

nspection

・When the unit is delivered, check and make sure that it has not been

damaged in transit. In particular, check the accessories, panel switches, and connectors.

・If the unit is damaged, or fails to operate according to the specifications,

contact your dealer or HIOKI representative.

Accessories

FUNCTION UP DISK 2 Instruction Manual 1 User registration card 1

────────────────────────────────────────────────────

Introduction

Page 10

────────────────────────────────────────────────────

afety Notes

DANGE

Safety symbols

This product is designed to conform to IEC 61010 Safety Standards, and has been thoroughly tested for safety prior to shipment. However, mishandling during use could result in injury or death, as well as damage to the product. Be certain that you understand the instructions and precautions in the manual before use. We disclaim any responsibility for accidents or injuries not resulting directly from product defects.

This manual contains information and warnings essential for safe operation of the product and for maintaining it in safe operating condition. Before using the product, be sure to carefully read the following safety notes.

・This symbol is affixed to locations on the equipment where the

operator should consult corresponding topics in this manual (which are also marked with the functions of the equipment.

・In the manual, this mark indicates explanations which it is

particularly important that the user read before using the equipment.

symbol) before using relevant

Indicates a grounding terminal.

Indicates AC (Alternating Current).

Indicates DC (Direct Current).

Indicates both DC (Direct Current) and AC (Alternating Current).

Indicates the ON side of the power switch.

Indicates the OFF side of the power switch.

────────────────────────────────────────────────────

Safety Notes

Page 11

────────────────────────────────────────────────────

Conventions used in this manual

The following symbols are used in this Instruction Manual to indicate the relative importance of cautions and warnings.

DANGE

WARNIN

CAUTIO

NOTE

Indicates that incorrect operation presents extreme danger of accident resulting in death or serious injury to the user.

Indicates that incorrect operation presents significant danger of accident resulting in death or serious injury to the user.

Indicates that incorrect operation presents possibility of injury to the user or damage to the equipment.

Denotes items of advice related to performance of the equipment or to its correct operation.

Measurement categories (Overvoltage categories)

The 8835-01 conforms to the safety requirements for CAT II measurement products. To ensure safe operation of measurement instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as CAT I to CAT IV, and called measurement categories. These are defined as follows. CAT

: Secondary electrical circuits connected to an AC electrical outlet

through a transformer or similar device.

CAT

: Primary electrical circuits in equipment connected to an AC electrical

outlet by a power cord (portable tools, household appliances, etc.)

CAT

: Primary electrical circuits of heavy equipment (fixed installations)

connected directly to the distribution panel, and feeders from the distribution panel to outlets.

CAT

: The circuit from the service drop to the service entrance, and to the

power meter and primary overcurrent protection device (distribution panel).

Higher-numbered categories correspond to electrical environments with greater momentary energy. So a measurement device designed for CAT III environments can endure greater momentary energy than a device designed for CAT II. Using a measurement instrument in an environment designated with a higher-numbered category than that for which the instrument is rated could result in a severe accident, and must be carefully avoided. Never use a CAT I measuring instrument in CAT II, III, or IV environments. The measurement categories comply with the Overvoltage Categories of the IEC60664 Standards.

────────────────────────────────────────────────────

Safety Notes

Page 12

────────────────────────────────────────────────────

otes on Use

Follow these precautions to ensure safe operation and to obtain the full benefits of the various functions.

(1) Installation environment

WARNIN

CAUTIO

WARNIN

Do not use the 8835-01 where it may be exposed to corrosive or combustible gases. The product may be damaged or cause an explosion.

・The 8835-01 should be installed and operated indoors only, between 5 and

40℃ and 35 to 80% RH.

・Do not store or use the product where it could be exposed to direct sunlight,

high temperature or humidity, or condensation. Under such conditions, the product may be damaged and insulation may deteriorate so that it no longer meets specifications.

・The 8835-01 is not designed to be entirely water- or dust-proof. To avoid

damage, do not use it in a wet or dusty environment.

(2) Power supply connections

Before turning the 8835-01 on, make sure the source voltage matches that indicated on the product’s power connector. Connection to an improper supply voltage may damage the product and present an electrical hazard.

Before making connections, make sure the 9439 DC POWER ADAPTER is turned off. The 8835-01 could be damaged by a spark if it is connected to a voltage source while its power supply is on.

・Check that the power supply is correct for the rating of the 8835-01.

(The AC fuse is integrated in the 8835-01.)

・The AC power power switch on 8835-01 is for AC power. If DC power is

being supplied and the switch on DC power adapter is set to ON, the 883501 will operate also if the power switch is set to OFF.

(3) Grounding the 8835-01

WARNIN

────────────────────────────────────────────────────

Notes on Use

To avoid electric shock and ensure safe operation, connect the power cable to a grounded (3-contact) outlet.

Page 13

vii

in a connection cable consist a risk of electric shock.

────────────────────────────────────────────────────

(5) Probe Connection, Measurement Voltage Input

DANGE

Maximum input voltage ratings for the 8936 ANALOG UNIT, 8937 VOLTAGE/TEMP UNIT, 8938 FFT ANALOG UNIT, 8939 STRAIN UNIT 8940 F/V UNIT, 8946 4ch ANALOG UNIT, 8947 CHARGE UNIT and input terminals of the 8835-01 are shown below. To avoid the risk of electric shock and damage to the unit, take care not to exceed these ratings.

The maximum rated voltage to earth of the 8936, 8937, 8938, 8939, 8940, 8946 and 8947 (voltage between input terminals and 8835-01 frame ground, and between inputs of other input units) is shown below. To avoid the risk of electric shock and damage to the unit, take care that voltage between channels and between a channel and ground does not exceed these ratings.

The maximum rated voltage to earth rating applies also if an input attenuator or similar is used. Ensure that voltage does not exceed these ratings.

When measuring power line voltages with the 8936 or 8938, always connect the probe to the secondary side of the circuit breaker. Connection to the primary side involves the risk of electric shock and damage to the unit.

Always use the optional connection cables. Any exposed metal sections

Input/output terminalMaximum input voltage

8936 inputs 8937 inputs 8938 inputs 8939 inputs 8940 inputs

8946 inputs 8947 inputs

400 VDC max. 370 V AC/DC

30 V rms or 60 VDC 30 V rms or 60 VDC

400 VDC max. 370 V AC/DC

10 VDC max. 40 VDC

30 V rms or 60 VDC

(BNC and sensor

connector terminals) 30 V rms or 60 VDC 30 V rms or 60 VDC

30 V rms or 60 VDC 30 V rms or 60 VDC

Maximum rated voltage

to earth

30 V rms or 60 VDC

(BNC terminal)

Not insulated

(Sensor connector termina

EXT TRIG

START/STOP

PRINT/EXT SMPL

TRIG OUT

GO NG

-5 to +10 VDC

Not insulated

-20 V to +30 VDC 100 mA max.

200 mW max.

The external I/O terminal and the 8835-01 have a common GND.

────────────────────────────────────────────────────

Notes on Use

Page 14

viii

────────────────────────────────────────────────────

DANGE

Logic probe input and 8835-01 share the same GND. Separate power supply sources applied to the testing device and 8835-01 may result in risk of electric shock and damage to the unit. Even with the same power supply source, certain ways of wiring may cause a variance in electric potential sending current that may damage testing device and 8835-01. The following shows proper wiring to avoid damage. For details, see Section 2.5.

(1) Before connecting logic probe to testing device, connect grounded

three-core power cord (attachment) to the device to be tested and 8835-01 and supply power from the same outlet.

(2) Before connecting logic probe to device to be tested, connect GND o

device to be tested with 8835-01 functional earth terminal. Make sure that power is supplied from the same outlet.

The maximum rated voltage to earth of the 9322 in the case of CAT II is 1,500V AC/DC when using a grabber clip, or 1,000V AC/DC when using an alligator clip. In the case of CAT III, the voltage is 600V AC/DC with either clip. In order to avoid injury from electric shock and damage to the 8835-01, do not input voltages greater than those listed above between input channel terminals and the main unit, or between inputs with another

9322.

CAUTIO

NOTE

WARNIN

The maximum input voltage of the 9322 is 1000 VAC/2000 VDC (CAT II) or 600 VAC/DC (CAT III). Attempting to measure voltage in excess of the maximum input could destroy the 8835-01 and result in personal injury or death.

The maximum input voltage of the 8947 CHARGE UNIT miniature connector terminal is ±500 pC (at range 6 high sensitivity), and ±50,000 pC (at range 6 low sensitivity).

Use only the specified connection cord. Using a non-specified cable may result in incorrect measurements due to poor connection or other reasons.

(6) Replacing the input units

To avoid electric shock accident, before removing or replacing an input module, confirm that the instrument is turned off and that the input cords and power cords are disconnected.

To avoid the danger of electric shock, never operate the product with an input module removed. To use the product after removing an input module, install a blank panel over the opening of the removed module.

────────────────────────────────────────────────────

Notes on Use

Page 15

────────────────────────────────────────────────────

(6) Recording paper

･ 8835-01 uses a thermal printer. The recording paper supplied has

NOTE

characteristics finely tuned for use with the printer. Using recording paper of a different specification may not only result in impaired printing quality, but even prevent the printer from operating. Always use the HIOKI specified product.

･ Insert the paper with correct orientation (see Section 2.7 of the 8835-01

Instruction Manual).

(7) Using a printer

NOTE

CAUTIO

Avoid using the printer in hot, humid environments, as this can greatly reduce printer life.

(8) Storing

For shipping or long-term storage, be certain that the recording head is in the raised position. Otherwise the rollers could be deformed and cause uneven printing.

(9) Shipping

・Remove the printer paper from the 8835-01. If the paper is left in the unit,

paper support parts may be damaged due to vibrations.

・To avoid damage to the product, be sure to remove the PC card and floppy

disk before shipping.

・Use the original packing materials when reshipping the product, if possible.

(10) Others

NOTE

･ In the event of problems with operation, first refer to Section 16.3,

"Troubleshooting."

･ Carefully read and observe all precautions in this manual.

────────────────────────────────────────────────────

Notes on Use

Page 16

────────────────────────────────────────────────────

(11) Handling the CD-R

CAUTIO

・Always hold the disc by the edges, so as not to make fingerprints on the disc

or scratch the printing.

・Never touch the recorded side of the disc. Do not place the disc directly on

anything hard.

・Do not wet the disc with volatile alcohol or water, as there is a possibility of

the label printing disappearing.

・To write on the disc label surface, use a spirit-based felt pen. Do not use a

ball-point pen or hard-tipped pen, because there is a danger of scratching the surface and corrupting the data. Do not use adhesive labels.

・Do not expose the disc directly to the sun’s rays, or keep it in conditions of

high temperature or humidity, as there is a danger of warping, with consequent loss of data.

・To remove dirt, dust, or fingerprints from the disc, wipe with a dry cloth, or

use a CD cleaner. Always wipe radially from the inside to the outside, and do no wipe with circular movements. Never use abrasives or solvent cleaners.

・Hioki shall not be held liable for any problems with a computer system that

arises from the use of this CD-R, or for any problem related to the purchase of a Hioki product.

Preliminary Checks

Before using the product the first time, verify that it operates normally to ensure that the no damage occurred during storage or shipping. If you find any damage, contact your dealer or HIOKI representative.

WARNIN

Before using the product, make sure that the insulation on the cords and probes is undamaged and that no bare conductors are improperly exposed. Using the product under such conditions could result in electrocution. Replace the cords and probes specified by HIOKI.

────────────────────────────────────────────────────

Notes on Use

Page 17

────────────────────────────────────────────────────

hapter Summary

Chapter 1 Product Overview

Contains an overview of the unit and its features.

Chapter 2 Installation Procedure

Chapter 3 Recorder and Memory Function

Chapter 4 FFT Function

Chapter 5 Other Functions

Chapter 6 Specifications

Appendix

Contains information that is necessary for using the 8835-01, including a description of error messages and a glossary.

────────────────────────────────────────────────────

Chapter Summary

Page 18

xii

────────────────────────────────────────────────────

Chapter Summary

Page 19

────────────────────────────────────────────────────

Chapter

.1 Outline

The 9540-01 FUNCTION UP DISK is provided exclusively for use in updating the 8835-01 MEMORY HiCORDER. Installation is easy using the provided floppy.

Product Overvie

────────────────────────────────────────────────────

1.1 Outline

Page 20

────────────────────────────────────────────────────

.2 Functions Added by the 9540-01 FUNCTION UP

DISK

Functions added by the 9540-01 FUNCTION UP DISK are as follows.

Measurement functions Recorder and memory function

FFT function

Computation functions Waveform processing

calculation Averaging function

Waveform decision functions

Memory segmentation functions

These topics are explained in later chapters.

Waveform area decision Waveform parameter decision

Sequential save function Multi-block function

────────────────────────────────────────────────────

1.2 Functions Added by the 9540-01 FUNCTION UP DISK

Page 21

────────────────────────────────────────────────────

Chapter

.1 Installation Procedure

Functional update can be accomplished using the functional update disk.

NOTE

Never turn off the power during upgrade of the ROM version; the program becomes unusable.

Installation Procedu

1. Insert the FUNCTION UP DISK1.

2. Press the

3. Select "FD" as the media type.

4. Load the file named "3501VUP1.PRG".

FILE key to call up the FILE screen.

Functional update floppy disk

5.When "Insert Disk 2 and press any key"

appears, insert "FUNCTION UP DISK2" and press any key.

6. After loading program file, message is

displayed -Version is updated. and the display screen appears. Installation is successful.

9540‑01 FUNCTION UP DIS

DISK 1

for 8835‑01

9540‑01 FUNCTION UP DIS

DISK 2

for 8835‑01

────────────────────────────────────────────────────

2.1 Installation Procedure

Page 22

────────────────────────────────────────────────────

2.1 Installation Procedure

Page 23

────────────────────────────────────────────────────

Chapter

Recorder and Memo

.1 Outline

.1.1 Outline of the Recorder and Memory Function

The recorder and memory function has the following features.

(1) While recording is in progress, recording by the memory can be initiated by

trigger.

(2) All input channel data are recorded on the same time axis.

Since data for all channels can be superimposed, the relative relationship between input signals can be observed visually.

Functio

(3) Time axis setting

・10 ms/DIV to 1 h/DIV (recorder) ・100 μms/DIV to 5 min/DIV (memory)

(4) Time axis resolution 100 points/DIV (5) Sampling period

For both recorder and memory functions, 1/100 of the memory time axis range setting

(6) Waveform magnification/compression display and printout

・Time axis direction: ×10 to ×1/8000 (memory recorder)

: ×1to×1/200 (recorder) ・Voltage axis direction: ×10 to ×1/2 With the variable function

(7) Display format

Time axis waveform: single, dual, quad screen display

(8) Scrollable display

・The data for the specified recording length are stored in memory. ・It is possible to scroll back for easy review.

(9) Additional recording function

(10) Print output

Printed output of displayed recorder waveforms or memory waveforms

────────────────────────────────────────────────────

3.1 Outline

Page 24

────────────────────────────────────────────────────

.1.2 Operation Sequence

The flowchart below illustrates the sequence of operations involved in using the recorder and memory function.

Start

Status 1 screen

Turn on the powe

Connect the inputs

Select function

Set the time axis rang (TIME/DIV).

Set the recording length

Select display function

Select the forma

Select the printer forma

Set smooth print function

Select the recorder and memory function.

Set independent time axis ranges for the recorder function and memory function (the speed with which the input signal waveform is captured).

Set independent recording lengths for the recorder function and memory recorder function (the length of the data sample for a single measurement).

Select the waveform to be displayed. Select the format type for the waveform

display screen. Select whether the result of waveform

calculation is printed as waveform or as numeric data.

(memory recorder)

Status 2 screen

Channel 1 scree

Channel 2 scree

Measurement

Set the additional recordin

function.

Make printer settings

Set auto save function

Make trigger settings

Set the voltage axis range input coupling, etc.

Set the variable function

Start measuremen

Printed recording

Select whether or not to enable additiona recording (recorder).

(recorder)

Select whether or not to save the waveform automatically after it is captured.

Set the trigger source, trigger types and conditions, the pre-trigger, etc. (memory). Set the trigger mode (recorder).

Set the waveform display color for each channel, voltage axis range, input coupling, zero position, and filter.

The waveform display position for each channel can be set to any position.

Press the measurement.

After the data capture, print the result.

START key to start

End

────────────────────────────────────────────────────

3.1 Outline

Page 25

────────────────────────────────────────────────────

.2 Making Settings

.2.1 Setting the Function Mode

Select the recorder and memory function.

Method

Screen: STATUS 1, 2, CHANNEL, DISPLAY

Call up the STATUS 1, 2, CHANNEL or DISPLAY screen. Move the flashing cursor to the position shown in the figure on the left. Press F4 [REC&MEM ].

Selection

：Memory recorder function ：Recorder function

：RMS recorder function ：Recorder and memory function

NOTE

：FFT function

On the Display screen, the display position in the figure is different from that on other screens.

Recorder and memory function

During real-time recording of a signal in the recorder function, if a fault is captured by a trigger, the relevant part of the signal is captured in parallel by the memory recorder at a high sampling rate. Thus the recorder operation is not interrupted by the memory recorder operation, and the normal recording is available in addition to the fault recording. After multiple trigger events, the first trigger event is recorded in memory, and subsequent event recordings are appended in memory. The memory recorder function can capture a maximum of 63 phenomena by memory segmentation.

Combined operation with Memory Segmentation

Only sequential saving (see Section 5.5.1) can be used. When sequential saving is enabled for combined operation, up to 63 memory recording phenomena can be stored in response to trigger events. Recording proceeds from the first block to the last, afterwhich memory recording is disabled. The recorder runs continuously. The number of memory segments determines the recording length. (Refer to the memory segmentation table in Section 5.5.1.)

────────────────────────────────────────────────────

3.2 Making Settings

Page 26

────────────────────────────────────────────────────

.2.2 Setting the Time Axis Range

・For both recorder and memory functions, set the speed for inputting and

storing the waveform of the input signal.

・Time axis range setting expresses the time for 1 DIV. ・The sampling interval is 1/100 of the memory time axis range setting (100

samples/DIV).

Method 1

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the time/div item, as shown in the figure on the left. Use the JOG control or the function keys to make the selection. The

TIME/DIV key modifies the recorder

time axis range regardless of where the flashing cursor is located.

NOTE

CAUTIO

Selection

：Move the cursor up in the selection

window.

：Move the cursor down in the

selection window.

On the DISPLAY screen, the selection window is not displayed.

The recorder sampling interval is determined by the sampling interval set in memory. However, some sampling intervals that can be set as a recorder time axis. See the table below for details.

Method 2

Method

Screen: DISPLAY

Call up the DISPLAY screen. Move the flashing cursor to the position shown in the figure on the left. Select the time axis range function that you want to set. Upon pressing the "Recorder & Memory" function key, the display changes where indicated in the figure, and you can set th waveform to be displayed.

REC&mem: Recorder waveform rec&MEM: Memory waveform

────────────────────────────────────────────────────

3.2 Making Settings

Page 27

30min

────────────────────────────────────────────────────

Move the flashing cursor to the position shown in the figure on the left, and use the function keys to set the time axis range. The

TIME/DIV key can be used regardless

of where the flashing cursor is located.

NOTE

・On the DISPLAY screen, the selection window is not displayed. ・In the recorder time axis range setting of 10 to 200 ms/DIV, the printer

cannot be set ON.

Combinations of recorder and memory time axis ranges

Vertical axis: Time axis (/DIV) of memory waveform Horizontal axis: Time axis (/DIV) of recorder waveform

10 ms20 ms50 m 100 μsYes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 200 μsYes Yes 500 μsYes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

1 ms Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 2ms

5ms 10 ms No No Yes Yes Yes Yes Yes 20 ms No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 50 ms No No

100 msNo No 200 msNo No 500 msNo No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

1 min No No No No No No No No No No No No No Yes Yes Yes Yes 2 min No No No No No No No No No No No No No No Yes Yes Yes 5 min No No No No No No No No No No No No No No No Yes Yes

Yes Yes

No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

1s No No No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes 2s No No No No No No No No No Yes

5s No No No No No No No No No No Yes Yes Yes Yes Yes Yes 10 s No No No No No No No No No No No Yes Yes Yes Yes Yes Yes 30 s No No No No No No No No No No No No

00 m

00 ms500 1s 2s 5s 10s 30s 1min2min5min10m

Yes

Yes Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes

No Yes Yes

No No

No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes

Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes

Yes

Yes Yes Yes Yes Yes Yes

Yes

Yes Yes Yes Yes

Yes Yes Yes

hou

Yes

────────────────────────────────────────────────────

3.2 Making Settings

Page 28

)

────────────────────────────────────────────────────

.2.3 Setting the Recording Length

・For both recorder and memory functions, the length of recording for one

measurement operation (number of DIV) can be set.

・Two types of recording length can be set.

Fixed recording length mode: Any recording length mode: Any recording length can be selected by the user.

Shows the measurement time in the se time axis range and recording length.

Display functio

Method 1

Method

(Fixed recording length mode

Screen: STATUS 1, DISPLAY

Call up the STATUS 1 or DISPLAY screen Move the flashing cursor to the shot item, as shown in the figure on the left. Use the JOG control or the function keys to make the selection.

Selection

：Move the cursor up in the selection

window.

：Move the cursor down in the

selection window.

：Set the fixed recording length mode ：Set the any recording length mode.

NOTE

・On the DISPLAY screen, the selection

window is not displayed.

・The setting on the DISPLAY screen is the

same as in Section 3.2.2.

────────────────────────────────────────────────────

3.2 Making Settings

Page 29

)

────────────────────────────────────────────────────

Display functio

Method 2

Method

Screen: STATUS 1, DISPLAY

Call up the STATUS 1 or DISPLAY screen Move the flashing cursor to the shot item, as shown in the figure on the left. Set the any recording length mode. Use the JOG control or the function keys to make the selection. Use the cursor keys to change the column.

Selection

(Any recording length mode

：Value up ：Value down

：Set the fixed recording length mode

：Set the any recording length mode.

NOTE

・On the DISPLAY screen, the setting cannot

be made with the

・The setting on the DISPLAY screen is the

same as in Section 3.2.2.

JOG control.

────────────────────────────────────────────────────

3.2 Making Settings

Page 30

────────────────────────────────────────────────────

.2.4 Setting the Display Function

・Select the waveform function to be used for display. ・During measurement, the display shows the recorder waveform. ・Function switching is used with display screen settings and displayed

waveforms.

Method 1

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left. Use the function keys to make the selection.

Selection

：Display the memory waveform. ：Display the recorder waveform.

Method 2

Method

Screen: DISPLAY

Call up the DISPLAY screen. Move the flashing cursor to the position shown in the figure on the left. Upon pressing the "Recorder & Memory" function key, you can switch the display function.

REC&mem: Recorder waveform rec&MEM: Memory waveform

────────────────────────────────────────────────────

3.2 Making Settings

Page 31

────────────────────────────────────────────────────

.2.5 Setting the Format

・The style can be set for showing input signals on the screen display and

recording them on the printer.

・The styles single, dual, and quad are available.

Method

Screen: STATUS

Press the STATUS key to call up the STATUS 1 screen. Move the flashing cursor to the format item as shown in the figure on the left. Use the function keys to select the display format.

Selection

：Single ：Dual ：Quad

If dual or quad screen display was chosen

in step 3, determine which input channel to display on which graph. This setting is made with the CHANNEL 1 screen.

1. Press the

CHAN key to call up the

CHANNEL 1 screen.

2. Use the

CH SELECT key to open

selected channel screen.

3. Move the flashing cursor to the point shown in the illustration at left. ・The illustration shows the setting for

CH1.

・Settings for CH2 - CH8 should be

made in the same way.

4. Use the function keys to select the graph.

：Display the waveform on graph 1. ：Display the waveform on graph 2. ：Display the waveform on graph 3.

：Display the waveform on graph 4.

*: when the quad screen display is selecte

────────────────────────────────────────────────────

3.2 Making Settings

Page 32

────────────────────────────────────────────────────

.2.6 Setting the Printer Format

・Selects whether waveform data are printed as waveform or as numeric data. ・When numeric data are selected, the data spacing interval also must be set.

Printing as a waveform

Method

Press the STATUS key to call up the

STATUS 1 screen.

Move the flashing cursor to the print mode

item, as shown in the figure on the left.

Use the function keys to make the

selection.

Selection

NOTE

：Waveform data are printed as a

waveform.

：Waveform data are printed as

numeric data.

Set the smooth print function (when the display function is Memory).

When the display function is Recorder, the "smooth print" item is not displayed.

────────────────────────────────────────────────────

3.2 Making Settings

Page 33

────────────────────────────────────────────────────

Printing as numeric data

Method

Press the STATUS key to call up the STATUS 1 screen. Move the flashing cursor to the print mode item, as shown in the figure on the left. Use the function keys to select numeric data

Selection

：Waveform data are printed as a

waveform.

：Waveform data are printed as

numeric data.

Move the flashing cursor to the print interval

item.

Use the JOG control or the function keys

to select the print interval.

NOTE

：Move the cursor up in the selection

window.

：Move the cursor down in the

selection window.

・When the print interval longer than the recording length is set, only the

first dot is printed.

・In the recorder function, the maximum and minimum values are printed.

(see Appendix 3.4 of the 8835-01 Instruction Manual.)

・In the recorder function, the print intervals of 0.01 to 0.5 DIV can be

selected only when there are wavefom data present.

────────────────────────────────────────────────────

3.2 Making Settings

Page 34

T a

, nt

────────────────────────────────────────────────────

.2.7 Setting the Additional Recording Function (Recorder

Waveform Only)

・This records, regarding the memory as though it were recording paper. ・The last 1000 divisions of waveform can be held in memory. ・The waveform can be scrolled and printed.

Switching the additional recording on and off affects the use of memory as shown below.

Additional recording OFF Additional recording ON

1. Recording 20 divisions of waveform 1. Recording 20 divisions of waveform

1000 division

20 division

2. Recording another 20 divisions of waveform

he first set of measurement data is discarded, nd recording of the second set of measuremen ata starts again from the beginning of memory

20 division

1000 division

20 division

2. Recording another 20 divisions of waveform

The first set of measurement data is preserved and recording of the second set of measureme data starts after the first set.

20 divisions 20 divisions

he first and seconfd sets of waveforms can b bserved by scrolling or printing the waveform.

────────────────────────────────────────────────────

3.2 Making Settings

Page 35

────────────────────────────────────────────────────

Method

Press the STATUS key to call up the STATUS 1 screen. Move the flashing cursor to the additional recording item, as shown in the figure on the left. Use the function keys to make the selection.

Selection

：Additional recording is disabled. ：Additional recording is enabled.

NOTE

・Time values output to the printer and displayed on the screen with the

additional recording function enabled are equal to those of the most recently acquired waveforms. Therefore, when measuring waveforms in a different time axis range, always take that difference into consideration.

・The voltage axis range is determined by the most recently acquired

waveforms.

.2.8 Setting the Printer Function (Recorder Waveform Only)

The input waveform is continuously printed in real time.

Method

Press the STATUS key to call up the STATUS 1 screen. Move the flashing cursor to the printer item as shown in the figure on the left. Use the function keys to make the selection.

Selection

：Printing is disabled. ：Printing is enabled.

NOTE

・See Section 10.7.3. in the 8835-01 instruction manual. ・In the recorder time axis range setting of 10 to 200 ms, the printer cannot

be set ON.

・Only the recorder waveform prints, regardless of the display function. ・Partial printing is disabled even when the A/B cursors are enabled.

────────────────────────────────────────────────────

3.2 Making Settings

Page 36

────────────────────────────────────────────────────

.2.9 Setting the Auto Save Function

When the function is enabled, waveform data are automatically stored on a floppy disk or PC card after they are captured.

Method

Press the STATUS key to call up the

STATUS 1 screen.

Move the flashing cursor to the auto save

item, as shown in the figure on the left.

Use the function keys to select the media.

Selection

：Auto save is disabled. ：Waveform data are automatically

stored on floppy disk.

：Waveform data are automatically

stored on PC card.

NOTE

The LAN selection is available only when a LAN is connected.

Selecting Media displays saving data options.

：Cancels automatic save when media

is full.

：Deletes old files and automatically

saves when media is full.

NOTE

In binary format, file is deleted as MEM. or REC. extension file when individually saved and as MEM., REC. or R_M extension file when saved in Save All. In text format, deleted file is saved as TXT. extension file.

File naming

See Section 9.5.5 of the 8835-01 Instruction Manual for entry options. In automatic save, file is titled with a number following the file name. When file is left untitled during processing, AUTO automatically executes.

NOTE

File name contains eight alphanumeric characters. In automatic save the last character may be replaced with a number to designate the file.

────────────────────────────────────────────────────

3.2 Making Settings

Page 37

────────────────────────────────────────────────────

Use the function keys to select the data store principle.

Selection

：Data are stored as binary data. ：Data are stored as text data.

NOTE

TEXT format is intended for reading on a PC Select BINARY format to read data on the 8835-01.

Selected TEXT in save options opens Thinning. Use the

JOG control or the function keys

to make the selection.

NOTE

・In automatic save channels cannot be selected. Only current channel

displaying waveform is saved.

・A file is stored in the directory currently selected on the file screen. ・Only a limited number of directories and files can be stored in the directory.

Use the function keys to select the function

to be stored.

：Only recorder waveforms are stored ：Only memory waveforms are stored

：Both recorder and memory

waveforms are stored.

・When batch saving with the Recorder & Memory, the measurement data

(with REC, MEM extensions) are created together with an index file (R_M). When only the measurement data are read, these are read to the respective functions. To read to the Recorder & Memory, read the index file (R_M).

・Do not change name of file created by Save All, neither delete nor move file

to avoid unsuccessful loading.

・When the auto save function is used while the additional recording function

is ON, only newly acquired waveform data is stored. (In this case, the A/B cursors are set OFF.)

・When saving only a Recorder waveform or Memory waveform, partial saving

is possible with the A/B cursors. However, when saving Recorder & Memory waveforms, partial saving is disabled even when the A/B cursors are activated.

────────────────────────────────────────────────────

3.2 Making Settings

Page 38

────────────────────────────────────────────────────

.3 Setting the Trigger

.3.1 Setting the Trigger

Set the trigger for the memory waveform.

Method

Press the STATUS key to call up the

STATUS 2 or DISPLAY screen.

Same as the normal trigger setting.

NOTE

────────────────────────────────────────────────────

3.3 Setting the Trigger

On the DISPLAY screen, the setting is made in the memory waveform window.

Page 39

────────────────────────────────────────────────────

.3.2 Setting the Trigger Mode

The trigger mode determines the way triggering is used to control operation of the 8835-01.

Method

Press the STATUS key to call up the STATUS 2 or DISPLAY screen. Move the flashing cursor to the position shown in the figure on the left, and use the function keys to make the selection.

Selection

：Setting starts when the START key

is pressed, and one measurement is taken.

NOTE

：Setting starts when the START key

is pressed, and measuremens are taken repeatedly.

：Activate recording at preset times.

Triggering can be performed at constant intervals within a preset start time and end time.

In the display screen, use recorder waveform window for settings.

────────────────────────────────────────────────────

3.3 Setting the Trigger

Page 40

────────────────────────────────────────────────────

.4 Settings on the Display Screen

Explains the setting items on the Display screen.

.4.1 Setting Magnification/Compression Along the Time Axis

・The magnification/compression ratio along the time axis can be set. ・By magnifying the waveform, detailed observations can be made. By

compressing the waveform, an entire change can be promptly apprehended.

・Magnification/compression of the screen uses the left edge as reference,

regardless of the status of the A/B cursor.

Method

Move the flashing cursor to the position

shown in the figure on the left.

Use the function keys to select the

magnification/compression ratio.

Selection

：Ratio up ：Ratio down

NOTE

The magnification/compression factor can be changed also after measurement is completed.

Reference The HELP key can be used to check which position within the entire

recording length is occupied by the currently shown waveform (see in Section 3.1.7 of the 8835-01 instruction manual).

VIEW key

────────────────────────────────────────────────────

3.4 Settings on the Display Screen

Page 41

────────────────────────────────────────────────────

.5 Start and Stop Measurement Operation

LED Lights during measuremen

During loading waveform memory, waveform loading status is displayed with messages below the window. Displayed messages are as follows; "MEMORY WAVE WAIT TRIG": Waiting for triggering. "MEMORY WAVE STORING": Loading memory waveform. "MEMORY WAVE STORE END": Completed loading waveform.

When sequential save is applied, "MEMORY WAVE XXX/000": Loaded block is displayed. (XXX is the last block loaded and 000 is the memory segment.)

Method

Press the START key to initiate

measurement or set the unit to trigger standby.

Press the STOP key during measurement

to stop the measurement.

────────────────────────────────────────────────────

3.5 Start and Stop Measurement Operation

Page 42

────────────────────────────────────────────────────

.6 Procedures for Saving Data

・This section explains how to save data in binary or text form without using

the auto-save function.

・Settings file considerations are the same as with other functions.

Method

Press the FILE key to call up the FILE screen. Select the "Save" command; the display changes as shown below. Use the function keys to make the selection.

NOTE

Selection

：Measurement data files (with REC

and MEM extensions), and an index file (R_M extension) are created. Both memory and recorder waveforms are saved.

Indicates the capacit required to save all.

Indicates the capacit required to save individually.

：Save individually (Saves the displa

function data.)

：Cancel (Do not save)

・When saving individually, partial saving is enabled if the A/B cursors have

been activated.

・With the Save All mode, partial saving is disabled even if the A/B cursors

have been activated.

・Individually saved data is loaded for each individual function. To load into

the Recorder & Memory function, use the Save All mode and load the index (R_M) file.

・When batch saving with the Recorder & Memory, the measurement data

(with REC, MEM extensions) are created together with an index file (R_M).

・Loading an index file automatically loads both memory and recorder

waveforms. Loading an index file created with the Save All mode and sequential save (see Section 5.5.1) enabled loads all blocks.

・When Save all is selected, the partial save cannot be executed even when A

and B cursors appear on the screen.

・Only a limited number of directories and files can be stored in the directory.

────────────────────────────────────────────────────

3.6 Procedures for Saving Data

Page 43

────────────────────────────────────────────────────

Chapter

.1 Outline

.1.1 Outline of the FFT Function

The recorder and memory function has the following features.

(1) FFT (Fast Fourier Transform) processing can be performed on input signal data

for frequency analysis.

(2) Frequency range

133 mHz to 400 kHz, 20 steps, external

(3) Frequency resolution

1/400, 1/800, 1/2000 or 1/4000 of frequency range

(4) 12 types of analysis functions

Storage waveform, linear spectrum, RMS spectrum, power spectrum, autocorrelation function, histogram, transfer function, cross-power spectrum, crosscorrelation function, unit-impulse response, coherence function, octave analysis

FFT Functio

(5) Analysis modes

1-channel FFT, 2-channel FFT

(6) Analysis of data stored with memory recorder function possible (7) Switchable antialiasing filter

Automatic selection of cutoff frequency to match frequency range (8938 FFT ANALOG UNIT)

(8) Waveform evaluation function using evaluation area

────────────────────────────────────────────────────

4.1 Outline

Page 44

────────────────────────────────────────────────────

.1.2 Operation Sequence

The flowchart below illustrates the sequence of operations involved in using the FFT function.

Start

Status 1 screen

Turn on the powe

Connect the inputs

Select function

Set the time axis rang (TIME/DIV).

Set the frequency

Set the recording length

Select the forma

Select the printer forma

Set the additional recordin

function.

Select the RMS recorder function.

Determine the speed with which the input signal waveform is captured.

Set the frequency of the measuring object

Determine the length of the data sample for a single measurement.

Select the format type for the waveform display screen.

Select whether the result of waveform calculation is printed as waveform or as numeric data.

Select whether or not to enable additiona recording.

Status 2 screen

Channel 1screen

Channel 2 scree

Measurement

Make printer settings

Set auto save function

Make trigger settings

Set the voltage axis range input coupling, etc.

Set the variable function

Start measuremen

Printed recording

Select whether or not to save the waveform automatically after it is captured.

Set the trigger source, trigger types and conditions, the pre-trigger, etc.

Set the waveform display color for each channel, voltage axis range, input coupling, zero position, and filter.

The waveform display position for each channel can be set to any position.

Press the measurement.

After the data capture, print the result.

START key to start

End

NOTE

────────────────────────────────────────────────────

4.1 Outline

FFT function does not execute report printing.

Page 45

────────────────────────────────────────────────────

.2 Making Settings

.2.1 Setting the Function Mode

Select the FFT function.

Method

Screen: STATUS 1, 3, CHANNEL, DISPLAY

Call up the STATUS 1, 3, CHANNEL or DISPLAY screen. Move the flashing cursor to the position shown in the figure on the left. Press F5 [FFT].

Selection

：Memory recorder function ：Recorder function

：RMS recorder function

：Recorder and memory function

：FFT function

NOTE

In Channel 2 (variable) screen function settings are available but variable settings are not reflected.

.2.2 Setting the FFT Channel Mode

・This setting determines whether only one channel (1ch-FFT) or two channels

(2ch-FFT) are used for FFT processing.

・When "1ch-FFT" is selected, certain FFT analysis modes will not be available.

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position

shown in the figure on the left.

Use the function keys to make the

selection.

Selection

：1ch-FFT ：2ch-FFT

NOTE

────────────────────────────────────────────────────

The following analysis functions are not possible in 1-channel FFT mode: Transfer function (TRF), cross-power spectrum (CSP), cross-correlation function (CCR), impulse response (IMP), coherence function (COH)

4.2 Making Settings

Page 46

────────────────────────────────────────────────────

.2.3 Setting the Frequency Range

・The frequency range (frequency axis maximum value) can be set as follows. ・The frequency range corresponds to the time axis range (TIME/DIV) setting of

the memory recorder function.

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left. Use the JOG control or the function keys to make the selection.

Selection

：Move the cursor up in the selection

window.

：Move the cursor down in the

selection window.

：External sampling

NOTE

・The antialiasing filter (8938 FFT ANALOG UNIT and 8947 CHARGE

UNIT) cutoff frequency is the same as the selected frequency range.

・Before executing external sampling, pay close attention to PRINT

EXT.SMPLE terminal settings. (see Section 9.3.2 of the 8835-01 Instruction Manual.)

Frequency Range, Frequency Resolution, Window Width, Corresponding Time Axis Range (Number of FFT points: 1000)

Frequency range

[Hz]

400 k * 200 k * 80k*

1 1

40 k 20 k 8k 4k 2k 800 400 200 80 40 20

1.33 * 667 m * 333 m * 133 m *

2 2 2

Frequency resolutio

[Hz]

1k 500 200 100 50 20 10 5 2 1 500 m 200 m 100 m 50 m 20 m 10 m

3.3 m

1.67 m

0.83 m

0.33 m

Window width

1ms 2ms 5ms 10 ms 20 ms 50 ms 100 ms 200 ms 500 ms 1s 2s 5s 10 s 20 s 50 s 100 s 5 min 10 min 20 min 50 min

Time axis

[ /DIV ]

100 μs 200 μs 500 μs 1ms 2ms 5ms 10 ms 20 ms 50 ms 100 ms 200 ms 500 ms 1s 2s 5s 10 s 30 s 1 min 2 min 5 min

The cutoff frequency of the antialiasing filter is the same as the selected frequency range, except for the cases listed below.

*1: Antialiasing filter is OFF. *2: Cutoff frequency is 20 Hz.

────────────────────────────────────────────────────

4.2 Making Settings

Page 47

────────────────────────────────────────────────────

.2.4 Setting the Number of FFT Points

・Set points for FFT processing. ・Settings at higher points increase frequency division capability but slow down

processing speed.

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left. Use the function keys to make the selection.

Selection

：Execute FFT processing set at 1000

points.

：Execute FFT processing set at 2000

points.

：Execute FFT processing set at 5000

points.

：Execute FFT processing set at

10000 points.

────────────────────────────────────────────────────

4.2 Making Settings

Page 48

────────────────────────────────────────────────────

.2.5 Setting the Window Function

・The window function defines the segment of the input signal that will be

processed.

・Window processing can be used to minimize leakage error.

Rectangular (rectangular window function): effective on discrete waveforms. Hanning (hanning window function): effective on continuous waveforms. Exponential (exponential window function): effective on decaying waveforms.

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left. Use the function keys to make the selection.

Selection

：Rectangular ：Hanning

：Exponential

If EXPO was selected, the coefficient item is

displayed. Select the attenuation ratio in percent, using the function keys or the

JOG control.

：Value up, large step ：Value up, small step ：Value down, small step ：Value down, large step

────────────────────────────────────────────────────

4.2 Making Settings

Page 49

10%10%N

────────────────────────────────────────────────────

NOTE

oise on attenuated waveform is reduced

aveform captured in one operation

00%

etting: Exponential window function

Attenuation ratio 10%

・If coefficient (attenuation ratio) is set to 0%, processing will be carried out as

0.1%.

・When measurements are taken using the Hanning window or exponential

window, note that the calculation results in the display of a value that is lower than the amplitude obtained when using a rectangular window.

────────────────────────────────────────────────────

4.2 Making Settings

Page 50

────────────────────────────────────────────────────

.2.6 Setting the Display Format

・You can set the format for displaying input signal waveforms on the screen

and recording them on the printer.

・The SINGLE, DUAL, and NYQUIST formats are available.

(1) Single

Displays the waveform on a single screen.

(2) Dual

Divides the waveform display screen into upper and lower screens.

(3) Nyquist

For the linear spectrum, cross power spectrum, and transfer function, displays the real-number portion of the data for the FFT calculation result on the Xaxis, and the imaginary number portion of the data on the Y-axis.

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left. Use the function keys to make the selection.

Selection

：Single ：Dual ：Nyquist

────────────────────────────────────────────────────

4.2 Making Settings

Page 51

Peak 1

Peak 2

Maximum value 1

42536

────────────────────────────────────────────────────

.2.7 Setting the Peak Display

・From the sampling points and FFT processing results, the 10 peak values or

maximum values can be shown.

・This setting is available in single-screen and dual-screen mode.

Peak value

・When data at one point are higher

than data within the vicinity, the point is a peak.

・The 10 highest peaks are shown.

Maximum value

Points with the 10 highest values are shown.

○, ●: Dat

NOTE

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left. Use the function keys to make the selection.

Selection

：Normal display ：Peak display ：Maximum value display

Peak value display is displayed in the display screen and printable, but not recorded as peak value in data saving.

────────────────────────────────────────────────────

4.2 Making Settings

Page 52

────────────────────────────────────────────────────

.2.8 Selecting Reference Data

Select data to be used for FFT processing.

New data

When START key is pressed, data points are captured and used for FFT processing.

Memory waveform

・Press START key to execute FFT processing set at data points specified with

FFT points on recorded data in memory (memory recorder data or memory waveform in recorder & memory).

・Start point for processing is specified by A/B cursors in the memory recorder

or memory waveform in recorder & memory display screen.

・ When the A/B cursors are used, data points specified with FFT points from

the first cursor are used for FFT processing.

・Upon selecting memory waveform, frequency defaults to frequency in line with

time axis as listed in chart in Section 4.2.3.

NOTE

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left.

Selection

：Capture new waveform data for

FFT processing

：Use stored waveform data for FFT

processing

When trigger mode is set to Continuous, Auto and reference data is set to memory, loaded waveform data in memory recorder function is processed by FFT processing shifted at specified points. ( data less than FFT point range can not be processed.)

────────────────────────────────────────────────────

4.2 Making Settings

Page 53

────────────────────────────────────────────────────

.2.9 Setting the FFT Analysis Mode

Used to select the FFT calculation method.

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left. Use the function keys to make the selection.

Selection

：Stored waveform ：Linear spectrum ：RMS spectrum ：Power spectrum

：Auto correlation function ：Histogram

NOTE

The transfer, cross-power spectrum, cross-correlation, unit-impulse response, and coherence functions use 2 channels.

.2.10 Setting the Analysis Channel

Select the channel for FFT analysis.

Method

：Transfer function ：Cross power spectrum ：Cross correlation function ：Impulse response

：Coherence function ：Octave analysis

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left. Use the JOG control or the function keys to to make the selection.

Selection

：Move the cursor up in the selection

window.

：Move the cursor down in the

selection window.

────────────────────────────────────────────────────

4.2 Making Settings

Page 54

────────────────────────────────────────────────────

NOTE

・For the transfer function and impulse response, calculation is performed

from "(w2)/(w1)".

・To prevent distortion due to sampling aliasing from affecting analysis, it is

recommended that the 8938 FFT ANALOG UNIT be used for channel input with FFT analysis.

.2.11 Setting the X-axis and Y-axis Displays

・Set the X and Y axis for display of FFT calculation results. ・Different units can be selected for the X and Y axis. ・With some FFT analysis modes, one of the axis cannot be set.

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left. Use the function keys to make the selection.

・Y-axi

・X-axi

：Real number part (linear display)

：Imaginary number part (linear

display)

：Amplitude (linear display)

：Frequency (linear display) ：Frequency (logalism display)

Selection

：Amplitude (decibel display) ：Phase (degree display)

・Octave analysi

：1/3 octave ：1/1 octave

────────────────────────────────────────────────────

4.2 Making Settings

Page 55

)

────────────────────────────────────────────────────

X and Y Axis Settings Available with each FFT Analysis Mode

FFT analysis mo de

STR Storage Waveform

LIN Linear Spectrum

RMS RMS Spectrum

PSP Power Spectrum ACR Auto Correlation Function

HIS Histogram

TRF Transfer Function

X-axis

(horizontal axis

(Time) (Linear)

LIN-Hz

LOG-Hz

LIN-Hz

LOG-Hz

LIN-Hz

LOG-Hz

(Time) (Linear)

(Volt) (Linear)

LIN-Hz

LOG-Hz

Y-axis

(vertical axis)

LIN-REAL LIN-IMAG LIN-MAG

LOG-MAG

PHASE

LIN-REAL LIN-IMAG LIN-MAG

LOG-MAG

PHASE

LIN-MAG

LOG-MAG

LIN-REAL LIN-IMAG LIN-MAG

LOG-MAG

PHASE

CSP Cross Power Spectrum

CCR Cross Correlation Function IMP Unit Impulse Response

COH Coherence Function

OCT Octave Analysis

Parens surrounding an item indicate that those items are fixed.

NOTE

When external sampling is used, the X-axis (horizontal axis) expresses the data count.

LIN-REAL

LIN-Hz

LOG-Hz

(Time) (Linear) (Time) (Linear)

LIN-Hz

LOG-Hz

1/3 OCT

1/1 OCT

LIN-IMAG LIN-MAG

LOG-MAG

PHASE

(Linear)

LIN-MAG

LOG-MAG

────────────────────────────────────────────────────

4.2 Making Settings

Page 56

────────────────────────────────────────────────────

.2.12 Setting the Display Scale

The display scale for showing the FFT processing result can either be set manually or automatically.

AUTO

The vertical axis (Y-axis) scale is set automatically, depending on the processing result.

MANUAL

The vertical axis (Y-axis) scale can be set as desired, to match the purpose of the measurement. This is useful for enlarging or reducing the amplitude and for shifting the waveform up or down.

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left. Use the function keys to make the selection.

Selection

：Scale set automatically. ：Scale set manually.

────────────────────────────────────────────────────

4.2 Making Settings

Page 57

────────────────────────────────────────────────────

(1) When AUTO is selected

Upper and lower limits are set automatically, according to the processing result.

(2) When MANUAL is selected

・The upper and lower limits for the display scale can be set by the user. ・Setting range is -9.9999E+29 to 9.9999E+29. (exponent is E-29 to E+29).

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left. Use the function keys etc. to enter the value.

Selection

NOTE

：Value up ：Value down

：Enter the value using the numeric

keys.

Displaying the display scale units

・The selected unit is displayed with "scaling" in the system screen. ・When scaling is turned OFF, the unit of the measurement range is displayed.

The X-axis setting for the histogram can be changed on the channel setting page of the CHANNEL 1 screen (changing upper limit and lower limit modifies x axis).

────────────────────────────────────────────────────

4.2 Making Settings

Page 58

────────────────────────────────────────────────────

.2.13 Octave Filter Setting

When octave analysis has been selected, two different filter types can be chosen.

Normal

Filter characteristics approximate the characteristics used for conventional octave analyzers with analog filters.

Sharp

Spectrum components outside the octave band are excluded totally and only the spectrum in the octave band is bundled and used for analysis. (The characteristics of both filter types are within ANSI CLASS 3 tolerance limits.)

Method

Screen: STATUS

Call up the STATUS 1 screen. Move the flashing cursor to the position shown in the figure on the left. Use the function keys to make the selection.

NOTE

Selection

：Normal filter characteristics ：Sharp filter characteristics

This unit does not use analog filters. It first determines the entire power spectrum and then uses weighting by bundling the spectrum to achieve the desired filter characteristics.

────────────────────────────────────────────────────

4.2 Making Settings

Page 59

────────────────────────────────────────────────────

.2.14 Setting the Averaging Function

・The averaging function allows capturing several instances of a waveform and

determining the average.

・This makes it possible to eliminate noise and irregular signal components. ・Time axis waveform averaging

Frequency axis waveform averaging

Method

Screen: STATUS

Call up the STATUS 2 screen. Move the flashing cursor to the average item as shown in the figure on the left. Use the function keys to select the type of averaging.

Selection

：Disable averaging

：Perform time axis waveform

summing averaging

：Perform time axis waveform

exponential averaging

：Perform frequency axis waveform

summing averaging

：Perform frequency axis waveform

exponential averaging

：Frequency axis waveform peak hold

Move the flashing cursor to the count item

and use the function keys or the JOG control to set the averaging count.

：Move the cursor up in the selection

window.

：Move the cursor down in the

selection window.

NOTE

・For averaging equations, see Section Appendix 3.1. ・When averaging is used together with the waveform evaluation function,

waveform evaluation is carried out after the specified averaging count is completed.

・After averaging was carried out, the scaling setting cannot be changed. ・After averaging, recalculation does not take place even if the analysis

channel is changed.

────────────────────────────────────────────────────

4.2 Making Settings

Page 60

────────────────────────────────────────────────────

FFT analysis mode and averaging

: Setting is valid

−: Setting is invalid (has no effect)

FFT analysis mode Y-axis

Storage waveform Linear spectrum

RMS spectrum

Power spectrum

Auto correlation function Histogram Transfer function

Time axis

averaging

(Linear) −

LIN-REAL LIN-IMAG

LIN-MAG

LOG-MAG

PHASE −

LIN-REAL LIN-IMAG

LIN-MAG

LOG-MAG

PHASE −

LIN-MAG

LOG-MAG

(Linear) (Linear) − −

LIN-REAL LIN-IMAG

LIN-MAG

LOG-MAG

PHASE

Frequency axi

averaging

−

Peak hold

−

Cross power s pectrum

Cross correlation function Unit impulse response Coherence function Octave analysis

Same for linear spectrum, transfer function and cross-power spectrum with Nyquist

LIN-REAL LIN-IMAG

LIN-MAG

LOG-MAG

PHASE − (Linear) (Linear) (Linear)

LIN-MAG

LOG-MAG

display.

−

────────────────────────────────────────────────────

4.2 Making Settings

Page 61

)

────────────────────────────────────────────────────

Averaging and trigger mode (FFT function)

Trigger mode: SINGLE

(1) After the

conditions are fulfilled, averaging is carried out, and then the waveform is displayed. Collected waveform data is averaged with the FFT time axis waveform and FFT processing is performed. FFT processing is performed on the frequency

axis and the calculated result is averaged. (2) Trigger occurs when the trigger conditions are fulfilled again. (3) When the specified number of data has been captured, measurement stops

automatically. If the measurement was stopped prematurely with the

STOP key, the averaging result up to that point is displayed.

START key was pressed, data are captured whenever the trigger

Input

Trigger

conditions

fulfilled

Frequency axi waveform

Waveform

capture

(for recording length

Waveform averaging count = less than specified number

Waveform averaging count = specified number

Time axi waveform

FFT

Averaging Displa

FFT

End

Trigger mode: REPEAT

(1) After the

START key was pressed, data are captured whenever the trigger

conditions are fulfilled, and averaging is carried out until the specified

averaging count. The averaging result is shown on the display. (2) Trigger occurs and the waveform is cleared when the trigger conditions are

fulfilled again. (3) When the specified averaging count is reached, data up to that point are

discarded, and new data are captured for averaging. If the measurement

was stopped prematurely with the

STOP key, the averaging result up to

that point is displayed.

Frequency axi waveform

Trigger

Input

────────────────────────────────────────────────────

conditions

fulfilled

After specified count

Waveform

capture

(for recording length

Time axi waveform

FFT

Averaging Displa

FFT

End

The STOP key is presse

4.2 Making Settings

Page 62

)

────────────────────────────────────────────────────

Trigger mode: AUTO (Time axis waveform)

When the

START key is pressed, data are captured even if trigger conditions

are not fulfilled after a certain interval. If averaging is applied to unsynchronized input signals, the result will be meaningless.

(Frequency axis waveform)

(1) After the

START key was pressed, data are captured whenever the trigger

conditions are fulfilled, and averaging is carried out until the specified averaging count. The averaging result is shown on the display.

(2) When the specified number of data has been captured, measurement stops

automatically.

(3) If the measurement was stopped prematurely with the

STOP key, the

averaging result up to that point is displayed.

If the trigger condition does not occur within the specified period waveform data input begins anyway.

Input

Trigger

conditions

fulfilled

Waveform

capture

(for recording length

FFT Averaging Displa

Press the STOP ke

End

────────────────────────────────────────────────────

4.2 Making Settings

Page 63

────────────────────────────────────────────────────

.2.15 Setting the Interpolation Function

The input signal (sampled data) and FFT waveform can be displayed and recorded as is, or after linear interpolation.

Method

Screen: STATUS

Call up the STATUS 2 screen. Move the flashing cursor to the position shown in the figure on the left. Use the function keys to make the selection.

Selection

：Linear interpolation is not

.2.16 Setting the Printer Format

・Selects whether the result of FFT calculation is printed as waveform or as

numeric data.

：Linear interpolation is performed.

Method

Screen: STATUS

Press the STATUS key to call up the STATUS 2 screen. Move the flashing cursor to the print mode item, as shown in the figure on the left Use the function keys to select.

Selection

：The result of FFT calculation is

printed as a waveform.

：The result of FFT calculation is

printed as numeric data.

Move the flashing cursor to the print interval

item.

Use the function keys to make the

selection.

：Move the cursor up in the selection

window.

：Move the cursor down in the

selection window.

────────────────────────────────────────────────────

4.2 Making Settings

Page 64

to a LAN).

────────────────────────────────────────────────────

.2.17 Setting the Auto Print Function

When the function is enabled, printout is carried out automatically after a waveform is captured.

Method

Screen: STATUS

Press the STATUS key to call up the STATUS 2 screen. Move the flashing cursor to the auto print item, as shown in the figure on the left Use the function keys to make the selection.

Selection

NOTE

Partial printing is disabled even when the A/B cursors are enabled.

.2.18 Setting the Auto Save Function

When the function is enabled, waveform data are automatically stored on a floppy disk or PC card after they are captured. A file is stored in the directory currently selected on the file screen.

Method

Screen: STATUS

Press the STATUS key to call up the STATUS 2 screen. Move the flashing cursor to the auto save item, as shown in the figure on the left. Use the function keys to select the media.

：Auto print is disabled. ：Auto print is enabled. ：Print data is automatically

transferred to the data collection server on the LAN (when connected

Selection

：Auto save is disabled.

：Waveform data are automatically

stored on floppy disk

：Waveform data are automatically

stored on PC card.

────────────────────────────────────────────────────

4.2 Making Settings

Page 65

────────────────────────────────────────────────────

NOTE

The LAN selection is available only when a LAN is connected.

Selecting Media displays saving data options.

：Cancels automatic save when media

is full.

：Deletes old files and automatically

saves when media is full.

NOTE

In binary format, deleted file is saved as FFT. extension file. In text format, deleted file is saved as TXT. extension file.

File naming See Section 9.5.5 of the 8835-01 Instruction Manual for entry options. In automatic save, file is titled with a number following the file name. When file is left untitled during processing, AUTO automatically executes.

NOTE

File name contains eight alphanumeric characters In automatic save the last character may be replaced with a number to designate the file.

Use the function keys to select the data store principle.

：Data are stored as binary data. ：Data are stored as text data.

・The TEXT format is intended for reading by a PC. Select BINARY for

reading by the 8835-01.

・In automatic save data cannot be selected. Only current processing result is

saved.

・When Auto printing and Auto save are both set to ON, Auto save is

executed prior to Auto printing.

・Only a limited number of directories and files can be stored in the directory. ・FFT data text format does not apply to save with thinning. ・Partial printing is disabled even when the A/B cursors are enabled.

────────────────────────────────────────────────────

4.2 Making Settings

Page 66

────────────────────────────────────────────────────

.2.19 Setting the Waveform Evaluation

・The waveform evaluation function can be used on the Single or Nyquist

screen.

・GO (pass) or NG (fail) evaluation of the input signal waveform can be

performed using an evaluation area specified by the user.

・This can serve to detect irregular waveforms. ・After the evaluation result is generated, signals are output from the GO/NG

terminal.

Method

Screen: STATUS

Press the STATUS key to call up the STATUS 2 screen. Move the flashing cursor to the wave

comparison item, as shown in the figure on

the left Use the function keys to make the selection..

NOTE

・Only one waveform evaluation area is saved in the internal memory. For

example, when the memory recorder function is changed to the FFT function and the waveform evaluation area of the FFT is saved, the waveform evaluation area created using the memory recorder function is erased.

・For details on the waveform evaluation, refer to Section 5.4. ・For the GO and NG terminal, see Section 12.7 of the 8835-01 Instruction

Manual.

.2.20 Setting the Trigger

Selection

：Disable waveform evaluation. ：Return NG if any part of the

waveform leaves the evaluation area.

：Return NG if the entire waveform

leaves the evaluation area.

：Evaluation area is created.

・Select the trigger that is suitable for the signal to be captured.

For details, see Chapter 8 of the 8835-01 Instruction manual.

・The voltage drop trigger cannot be set in the ranges of 133 m to 400 Hz.

────────────────────────────────────────────────────

4.2 Making Settings

Page 67

────────────────────────────────────────────────────

.3 Analysis Function

.3.1 Storage Waveform [STR]

Displays the time domain waveform of the input signal. Displays the time domain waveform of the input signal.

Functio

Horizonta

curso

Vertica

curso

Time Time axis display

Indicates the value of the specified TIME/DIV frequency range. (Refer to the table of the frequency range and time axis in Section 4.2.3.)

Linear Indicates the value of the measurement range of the input unit

in voltage units.

Vertical axis Display LIN-REAL (real-number part) − LIN-IMAG (imaginary-number part) − LIN-MAG (amplitude) fa LOG-MAG (logarithmic amplitude) − PHASE (phase) −

Example Stored waveform

Y-axi

Input signa waveform

X-axi

────────────────────────────────────────────────────

4.3 Analysis Function

Page 68

────────────────────────────────────────────────────

.3.2 Linear Spectrum [LIN]

The frequency domain waveform of the input signal, including magnitude and phase information.

Major applications include:

・Determining the peaks of waveform frequency components ・Determining the levels of high and low harmonics

Functio

Horizonta

curso

Vertica

curso

LIN-Hz Frequency spectrum display as linear units.

The range is from DC to the maximum frequency range value.

LOG Hz Frequency spectrum display as logarithmic units.

The number of FFT points and the range are as follows.

Number of FFT points Rrange

1000 1/400 the maximum frequency range value t

the maximum frequency range value

2000 1/800 the maximum frequency range value t

the maximum frequency range value

5000 1/2000 the maximum frequency range value

to the maximum frequency range value

10000 1/4000 the maximum frequency range value

to the maximum frequency range value

Real Linear display of real-number part of the data as voltage

(Nyquist mode)

LIN-REAL Linear display of real-number part of the data as voltage LIN-IMAG Linear display of imaginary-number part of the data as voltage LIN-MAG Linear display of analysis data as voltage LOG-MAG Logarithmic display of analysis data as dB

(0dB reference value: 1 V peak=αVp-p) PHASE Degrees (deg) display of phase component of data Imag Linear display of imaginary-number part of the data as voltage

(Nyquist mode)

Vertical axis Display LIN-REAL (real-number part) |Fa|･cos ∠θa LIN-IMAG (imaginary-number part) |Fa|･ sin ∠θa LIN-MAG (amplitude) |Fa| LOG-MAG (logarithmic amplitude) 20･log |Fa| PHASE (phase) ∠θa

────────────────────────────────────────────────────

4.3 Analysis Function

Page 69

)

────────────────────────────────────────────────────

Examples Linear spectra waveforms

tored waveform

-axis: LIN-IMAG (X-axis: LOG-Hz

-axis: LIN-REAL (X-axis: LOG-Hz

-axis: LIN-MAG (X-axis: LOG-Hz

-axis: LOG-MAG (X-axis: LOG-Hz

yquis

-axis: PHASE (X-axis: LOG-Hz

────────────────────────────────────────────────────

4.3 Analysis Function

Page 70

────────────────────────────────────────────────────

.3.3 RMS Spectrum [RMS]

Displays the frequency domain waveform of the input signal, including magnitude (effective value) and phase information.

Major applications include:

・Determining the peaks of waveform frequency components. ・Determining the effective values of frequency components.

Functio

Horizonta

curso

C components: Ra = F

LIN-Hz Frequency spectrum display as linear units. The range is from

DC to the maximum frequency range value.

LOG-Hz Frequency spectrum display as logarithmic units.

The number of FFT points and the range are as follows.

Number of FFT points Rrange

1000 1/400 the maximum frequency range value t

the maximum frequency range value

2000 1/800 the maximum frequency range value t

the maximum frequency range value

5000 1/2000 the maximum frequency range value

to the maximum frequency range value

10000 1/4000 the maximum frequency range value

to the maximum frequency range value

Vertica

curso

NOTE

1 Vrms)

PHASE Degrees (deg) display of phase component of data

Vertical axis Display LIN-REAL (real-number part) |Ra|･cos∠θa LIN-IMAG (imaginary-number part) |Ra|･sin ∠θa LIN-MAG (amplitude) |Ra| LOG-MAG (logarithmic amplitude) 20･log |Ra| PHASE (phase) ∠θa

The RMS spectrum display and the LOG-MAG display express the same processing result.

────────────────────────────────────────────────────

4.3 Analysis Function

Page 71

)

────────────────────────────────────────────────────

Example RMS spectra waveform 08-23, 30, 31, 32, 33, 34

tored waveform

-axis: LIN-IMAG (X-axis: LOG-Hz

-axis: LIN-REAL (X-axis: LOG-Hz

-axis: LIN-MAG (X-axis: LOG-Hz

-axis: LOG-MAG (X-axis: LOG-Hz

-axis: PHASE (X-axis: LOG-Hz

────────────────────────────────────────────────────

4.3 Analysis Function

Page 72

────────────────────────────────────────────────────

.3.4 Power Spectrum [PSP]

Displays the energy spectrum of the input signal, consisting of only magnitude information.

Major applications include:

・Determining the peaks of waveform frequency components ・Determining the energy levels of high and low harmonics

Functio

DC component

Horizonta

curso

Vertica

curso

LIN-Hz Frequency spectrum display as linear units. The range is from

DC to the maximum frequency range value.

LOG Hz Frequency spectrum display as logarithmic units.

The number of FFT points and the range are as follows.

Number of FFT points Rrange

1000 1/400 the maximum frequency range value t

the maximum frequency range value

2000 1/800 the maximum frequency range value t

the maximum frequency range value

5000 1/2000 the maximum frequency range value

to the maximum frequency range value

10000 1/4000 the maximum frequency range value

to the maximum frequency range value

LIN-MAG Linear display of analysis data as binary exponential voltage

This expresses the energy component.

LOG-MAG Logarithmic display of analysis data as dB

(0dB reference value: 1 V

rms)

Vertical axis Display LIN-REAL (real-number part) − LIN-IMAG (imaginary-number part) − LIN-MAG (amplitude) Gaa LOG-MAG (logarithmic amplitude) 10 log |Gaa| PHASE (phase) −

NOTE

The LOG-MAG display and the RMS spectrum display express the same processing result.

────────────────────────────────────────────────────

4.3 Analysis Function

Page 73

)

────────────────────────────────────────────────────

Example Power spectra waveforms

tored waveform

-axis: LIN-MAG (X-axis: LOG-Hz

Overall valu

Overall value

The overall value is the total effective value obtained from the frequency spectrum contained in the input signal. It is obtained by taking the square root of the total of power spectra for all frequencies.

(Overall value

PSPo DC component PSPi ith AC component

-axis: LOG-MAG (X-axis: LOG-Hz

NOTE

Compensation is applied to data captured before starting FFT processing, to achieve the same overall value, also when a window function other than rectangular window is used.

Window compensation value: γ

Square wave: γ =1 8

Hanning: γ = 3

2 log(α/100 Exponential: γ= (α/100)

ｰ 1

(α is a percentage with a range of 0 ≦α＜100.) If α is set to 0 with the exponential window function, processing will be carried with α = 0.1.

────────────────────────────────────────────────────

4.3 Analysis Function

Page 74

────────────────────────────────────────────────────

.3.5 Auto Correlation [ACR]

Displays the degree of similarity between two points in the input signal separated by time difference (τ).

Major applications:

・Detecting a periodic signal contained in a noisy signal with an improvement in

signal-to-noise ratio.

・Checking the periodic signal components contained in a noisy waveform, and

periodic noise.

Functio

Horizonta

curso

Vertica

curso

Time Time display. The center indicates the reference (τ=0), the right

side indicates time lag (+τ), and the left side indicates time lead (-τ).

Linear Readings are between +1 and -1 (without units).

+1: the highest similarity for time differential τ 0: the lowest similarity, -1: the polarity is completely opposite. Due to the characteristics of the function, τ=0 always results in +1.

Vertical axis Display LIN-REAL (real-number part) − LIN-IMAG (imaginary-number part) − LIN-MAG (amplitude) Raa LOG-MAG (logarithmic amplitude) − PHASE (phase) −

Example Auto correlation function waveforms

tored waveform

uto correlation functio

Because the input waveform is the frequency waveform, peaks are repeated at regular intervals.

────────────────────────────────────────────────────

4.3 Analysis Function

The time until the first pea is the input signal period.

Page 75

────────────────────────────────────────────────────

.3.6 Histogram [HIS]

Displays the frequencies of the magnitudes of sampled points. Major applications include:

・Determining waveform imbalance ・Determining whether a waveform is artificial or natural from the waveform

distribution (most natural waveforms are regular sine waves).

Functio

Horizonta

Volt Linear display of the measurement range of the input unit.

curso

Vertica

curso

Linear Number of sample points for the time axis data (total: 1000,

2000, 5000 or 10000 points).

Vertical axis Display LIN-REAL (real-number part) − LIN-IMAG (imaginary-number part) − LIN-MAG (amplitude) Pa LOG-MAG (logarithmic amplitude) − PHASE (phase) −

Example Histogram function waveforms 08-66, 39

igh amplitude indicates high number of data

tored waveform

istogram functio

────────────────────────────────────────────────────

4.3 Analysis Function

Page 76

a b

────────────────────────────────────────────────────

.3.7 Transfer Function [TRF]

Displays the transfer function (frequency characteristics) of the system being measured calculated from input and output signals.

Nyquist diagrams can also be displayed, including magnitude and phase information.

Major applications include:

・Determining filter frequency characteristics. ・Determining feedback control system stability through Nyquist diagrams. ・Determining the physical resonant frequency using an impulse hammer and

pick-up sensor.

Functio

Horizonta

curso

: input : outpu

LIN-Hz Frequency spectrum display as linear units. The range is from

DC to the maximum frequency range value.

LOG-Hz Frequency spectrum display as logarithmic units.

The number of FFT points and the range are as follows.

Number of FFT points Rrange

1000 1/400 the maximum frequency range value t

the maximum frequency range value

2000 1/800 the maximum frequency range value t

the maximum frequency range value

5000 1/2000 the maximum frequency range value

to the maximum frequency range value

10000 1/4000 the maximum frequency range value

to the maximum frequency range value

Real Linear display of the real-number part of the input-to-output

ratio (Nyquist mode)

Vertica

curso

────────────────────────────────────────────────────

4.3 Analysis Function

RIN-REAL Linear display of the real-number part of the input-to-output

ratio (no units).

LIN-IMAG Linear display of the imaginary-number part of the input-to-

output ratio (no units).

LIN-MAG Linear display of input-to-output ratio (no units)

This expresses the amplitude component.

LOG-MAG Logarithmic display of input-to-output ratio as dB (no units)

This expresses the amplitude component.

PHASE Degrees (deg) display of phase component of data of input-to-

output ratio

Imag Linear display of the imaginary-number part of the input-to-

output ratio (Nyquist mode).

Page 77

)

────────────────────────────────────────────────────

Vertical axis Display LIN-REAL (real-number part) |Hab|･cos∠θb−∠θa LIN-IMAG (imaginary-number part) |Hab|･sin ∠θb−∠θa LIN-MAG (amplitude) |Hab| LOG-MAG (logarithmic amplitude) 20 log |Hab| PHASE (phase) ∠θb−∠θa

Example Transfer function spectra waveform 8-40, 41, 42, 43, 44, 45, 46, 47

tored waveform (input signa

-axis: LIN-REAL (X-axis: LOG-Hz

-axis: LIN-MAG (X-axis: LOG-Hz

tored waveform (output signa

After bandpass filter

-axis: LIN-IMAG (X-axis: LOG-Hz

-axis: LOG-MAG (X-axis: LOG-Hz

-axis: PHASE (X-axis: LOG-Hz

────────────────────────────────────────────────────

yquis

4.3 Analysis Function

Page 78

────────────────────────────────────────────────────

.3.8 Cross Power Spectrum [CSP]

Displays the product of the spectra of two input signals. The magnitude and phase information of the frequency components that are

common to both signals can be displayed. Major applications:

Obtaining frequency components common to two signals.

Functio

Horizonta

curso

Vertica

curso

LIN-Hz Frequency spectrum display as linear units. The range is from

DC to the maximum frequency range value.

LOG Hz Frequency spectrum display as logarithmic units.

The number of FFT points and the range are as follows.

Number of FFT points Rrange

1000 1/400 the maximum frequency range value t

the maximum frequency range value

2000 1/800 the maximum frequency range value t

the maximum frequency range value

5000 1/2000 the maximum frequency range value

to the maximum frequency range value

10000 1/4000 the maximum frequency range value

to the maximum frequency range value

Real Linear display of real-number part of the data as voltage

(Nyquist mode).

LIN-REAL Linear display of real-number part of the data as binary

exponential voltage

LIN-IMAG Linear display of imaginary-number part of the data as binary

exponential voltage

LIN-MAG Linear display of amplitude component as binary exponential

voltage

LOG-MAG Logarithmic display of the amplitude component as dB

(0dB reference value; 1V

rms.) PHASE Degrees (deg) display of phase component of data Imag Linear display of imaginary-number part of the data as binary

exponential voltage (Nyquist mode)

Vertical axis Display LIN-REAL (real-number part) |Gab|･cos ∠θb−∠θa LIN-IMAG (imaginary-number part) |Gab|･sin ∠θb−∠θa LIN-MAG (amplitude) |Gab| LOG-MAG (logarithmic amplitude) 10 log |Gab| PHASE (phase) ∠θb−∠θa

────────────────────────────────────────────────────

4.3 Analysis Function

Page 79

)

────────────────────────────────────────────────────

Example Cross power spectra waveforms

tored waveform

-axis: LIN-REAL (X-axis: LOG-Hz

tored waveform

-axis: LIN-IMAG (X-axis: LOG-Hz

-axis: LIN-MAG (X-axis: LOG-Hz

-axis: PHASE (X-axis: LOG-Hz

-axis: LOG-MAG (X-axis: LOG-Hz

yquis

────────────────────────────────────────────────────

4.3 Analysis Function

Page 80

────────────────────────────────────────────────────

.3.9 Cross Correlation [CCR]

Displays the degree of similarity between two points separated by a time difference (τ) on two signals.

The degree of similarity is expressed as a function of the time difference (τ). Major applications:

・Obtaining the phase difference between two signals in time units. ・Obtaining a speed or distance by measuring the time delay.

Functio

Horizonta

curso

Vertica

curso

Time Time display. The center indicates the reference (τ=0), the right

side indicates time lag (+τ), and the left side indicates time lead (-τ).

Linear Readings are from +1 to -1 (no units).

+1: the highest similarity between the input and output signals for time differentialτ, 0: the lowest similarity, -1: the polarity is completely opposite

Vertical axis Display LIN-REAL (real-number part) − LIN-IMAG (imaginary-number part) − LIN-MAG (amplitude) Rab LOG-MAG (logarithmic amplitude) − PHASE (phase) −

────────────────────────────────────────────────────

4.3 Analysis Function

Page 81

)

────────────────────────────────────────────────────

Example Cross correlation function waveforms

tored waveform (input waveform

ross correlation functio

Phase differences between input signal and output signa

tored waveform (output waveform

────────────────────────────────────────────────────

4.3 Analysis Function

Page 82

Function

────────────────────────────────────────────────────

.3.10 Unit Impulse Response [IMP]

Displays the frequency response of a system in the time domain. A response waveform equivalent to the unit impulse function is obtained by

analyzing the input and output signals of the system being measured. Major applications

Checking circuit time constants.

Horizonta

curso

Vertica

curso

Time Time display. The center indicates the reference (τ=0), the right

side indicates time lag (+τ), and the left side indicates time lead (-τ).

Linear Inverse Fourier conversion value of the transfer function (Hab)

(no units).

Vertical axis Display LIN-REAL (real-number part) − LIN-IMAG (imaginary-number part) − LIN-MAG (amplitude) IMP LOG-MAG (logarithmic amplitude) − PHASE (phase) −

Example Unit impulse response waveforms

tored waveform (input signa

tored waveform (output signa

nit impulse respons

Input point of impulse signa

────────────────────────────────────────────────────

4.3 Analysis Function

Page 83

────────────────────────────────────────────────────

.3.11 Coherence [COH]

Displays the output signal component that is coherent (interference possible) to the input signal, yielding a value from 0 to 1.

Major applications include:

・Evaluation of transfer functions. ・Determining the contribution of individual input lines to the output of multi-

input systems.

Functio

Horizonta

curso

Vertica

curso

LIN-Hz Frequency spectrum display as linear units. The range is from

DC to the maximum frequency range value.

LOG-Hz Frequency spectrum display as logarithmic units.

The number of FFT points and the range are as follows.

Number of FFT points Rrange

1000 1/400 the maximum frequency range value t

the maximum frequency range value

2000 1/800 the maximum frequency range value t

the maximum frequency range value

5000 1/2000 the maximum frequency range value

to the maximum frequency range value

10000 1/4000 the maximum frequency range value

to the maximum frequency range value

Linear The relationship between the two input signals. The degree of

relationship is indicated from 0 to 1 on a linear scale (no units).

Vertical axis Display LIN-REAL (real-number part) − LIN-IMAG (imaginary-number part) − LIN-MAG (amplitude) COH LOG-MAG (logarithmic amplitude) − PHASE (phase) −

NOTE

For a single measurement, the coherence function returns 1 for all frequencies. When measuring, be sure to use frequency averaging.

────────────────────────────────────────────────────

4.3 Analysis Function

Page 84

────────────────────────────────────────────────────

Example Coherence function waveforms

tored waveform (input signa

oherenc

tored waveform (output signa

Frequencies in this range have high coherence.

────────────────────────────────────────────────────

4.3 Analysis Function

Page 85

────────────────────────────────────────────────────

.3.12 Octave Analysis [OCT]

This function displays the spectrum of a noise signal or other signal, using 1/1octave or 1/3-octave band filters with fixed ratio.

Main uses

Frequency analysis of noise

Functio

Horizonta

curso

Vertica

curso

OCT

1/1 OCT 1/1-octave band filtering 1/3 OCT 1/3-octave band filtering

LIN-MAG Linear display of octave analysis value as voltage LOG-MAG Logarithmic display of octave analysis value as dB

Vertical axis Display LIN-REAL (real number) − LIN-IMAG (imaginary number) − LIN-MAG (amplitude) OCT LOG-MAG (logarithmic amplitude) 10log (OCT) PHASE −

・For frequency analysis of a noise signal or similar, the signal is passed

through fixed-ratio band filters with 1/1-octave or 1/3-octave bandwidth.

・As opposed to the power spectrum function, where the signal is divided into

bands of identical width and the power in each band is displayed, octave analysis divides the frequency axis evenly on a logarithmic scale and expresses the level as a bar for each band.

・In analog octave analysis, the octave band center frequencies and filter

characteristics are determined according to the ANSI CLASS 3 standard. In the 8835-01, the power spectrum is measured first and bundling is then used to perform 1/1-octave or 1/3-octave analysis. This allows the following analysis functions:

5-band 1/1-octave analysis 15-band 1/3-octave analysis

・15-band 1/3-octave analysis and filter characteristics of the 8835-01 correspond

to the ANSI CLASS 3 standard. However, in the upper bands of frequency analysis, there are no leak components from higher frequencies.

For example, the 20 kHz band contains no leak components from the 25 kHz band or other bands.

・15-band 1/3-octave analysis

In this mode, the 400 spectrum lines of regular frequency analysis are bundled into 1/3 octave bands and shown as a bar graph.

────────────────────────────────────────────────────

4.3 Analysis Function

Page 86

────────────────────────────────────────────────────

・5-band 1/1-octave analysis

In this mode, the 400 spectrum lines of regular frequency analysis are bundled into 1/1 octave bands and shown as a bar graph.

Example Octave analysis waveforms

tored waveform

/1 octave analysi

Band No

/3 octave analysi

Band No

────────────────────────────────────────────────────

4.3 Analysis Function

Page 87

────────────────────────────────────────────────────

Frequency ranges and measurable range widths (○: 1/1 OCT, △: 1/3 OCT)

Band No

1/1 1/3

-8

-7

-6

-5

-4

-3

-2

-1

0-10

123

256

389

41112

61718

102930

113233

133839

Center

frequency

(Hz)

-24

-234m5m○ △

-22

6.3m

-21

-20

10m

-19

12.5m

-18

16m

-17

20m

-16

25m

-15

31.5m

-14

40m

-13

50m

-12

63m

-11

80m

-10

100m

-9

125m

-8

160m

-7

200m

-6

250m

-5

315m

-4

400m

-3

500m

-2

630m 800m

1.25

1.6

2.5

3.15

6.3

12.5 16

31.5

40 50

100

125

160

200

250

315

400

500

630 800

1.25k

1.6k

2.5k

3.15k 36 37

6.3k

10k

12.5k 42

16k

20k

4 5

4k 5k

△ ○△ △○

△ ○△ △

△ △

○△ △

△ ○△ △

Frequency ranges (Hz)

1.334 8 20 40 80 2004008002k 4k 8k 20k40k80

○ △

△

○

○△

△

△ △

△

○△

△

△ ○△ △

○△ △

△ ○△ △

△ ○△

○△ △

△ ○△ △

△ ○△

○ △

△ ○△ △

○ △

△ ○△ △

○ △

△ ○△ △

△ ○

△ ○△ △

△ ○

△ ○△ △

△ ○

○△ △

△ ○△ △

○△ △

△ ○△ △

△ ○△

○△ △

△ ○△ △

△ ○△

○ △

△ ○△ △

○ △

△ ○△ △

○△ △

△ ○△ △

○ △

△ ○△ △

────────────────────────────────────────────────────

4.3 Analysis Function

Page 88

────────────────────────────────────────────────────

Band No

1/1 1/3

45 46

164748

175051

185354

55 5657400k

Center

frequency

(Hz)

25k

31.5k 40k

50k 63k 80k

100k 125k 160k

200k 250k 315k

500k

Frequency ranges (Hz)

1.334 8 20 40 80 2004008002k 4k 8k 20k40k80

△ ○△ △

△ ○

△ ○△ △

△ ○

────────────────────────────────────────────────────

4.3 Analysis Function

Page 89

5 s

────────────────────────────────────────────────────

Chapter

.1 Outline

The following five functions are added by the 9540-01 FUNCTION UP DISK.

・Waveform processing calculation ・Waveform parameter decision ・Waveform area decision ・Memory segmentation functions ・Averaging function

.2 Calculating Waveform Data

・Waveform processing is possible only for the memory recorder function and

memory waveform in recorder & memory.

・Memory waveform in recorder & memory is processed by memory recorder

function.

・The values processed are those read between the trace cursors. ・Processing results are displayed as a waveform. ・Processing is only possible for waveforms for which the recording length was

set at 1000 divisions or less.

・Use the A/B cursors (vertical or trace cursor) to specify the processing range

for the waveform data.

The following operators can be used to define processing equations. (1) Arithmetic operators (+, -,*,/) (2) Absolute value (ABS) (3) Exponent (EXP) (4) Logarithm (LOG) (5) Square root (SQR) (6) Displacement average (MOV) (7) Parallel displacement on time axis (SLI) (8) 1st and 2nd differential (DIF, DIF2) (9) 1st and 2nd integral (INT, INT2) (10) Trigonometric functions (SIN, COS, TAN) (11) Reverse trigonometric functions (ASIN, ACOS, ATAN)

Other Function

────────────────────────────────────────────────────

5.1 Outline

Page 90

D E

n D S

T W

lt i i

s D

ta s

M c f C between the A and B cursors.

────────────────────────────────────────────────────

Waveform Processing Procedure

Setting the waveform parameter calculation

Enter the calculation

Enter equation

Delete equatio Copy equation

Setting the channel for recordin

processing results

Setting the calculation

Display scale

Floating decima point

OFF ON

Numerical valu Operators

Constant value

Delete Select numb Copy None CH 1

to CH 8 Auto Manual Moving Sliding

isable waveform processing. nable waveform processing.

nter the calculation

onstant value can be used for calculatio elete calculation selected elect calculation to be copied.

he calculation result is not displayed

hen the source channel is the same as he channel to which the calculation resu s recorded in the calculation formula, the nput waveform data of the source chann s overwritten by the calculation result.

hen using "MOV" or "SLI" for operators

et the floating decimal point.

Executing the waveform calculation

New data

isplay the Waveform display screen and

ress the START key. The waveform da

tored is calculated.

Saving data

ove the flashing cursor to "wave

alculation" item and select "(exec)"

unction key.

alculate the existing waveform data

────────────────────────────────────────────────────

5.2 Calculating Waveform Data

Page 91

)

────────────────────────────────────────────────────

.2.1 Preparing for Waveform Processing

Method

Screen: STATUS 5 (MEM

NOTE

Press the STATUS key to call up the STATUS 5 screen. Move the flashing cursor to the position shown in the figure on the left. Make the setting with the function keys.

Selection

：Disable waveform processing. ：Enable waveform processing.

The various setting items are displayed.

：Execute waveform processing.

・The maximum recording length at which waveform processing calculation is

possible is 1000 divisions. If the waveform data size exceeds this upper limit, calculation is not possible.

・Range under 1000 DIV specified between A/B cursors is not available for

processing when recording length is over 1000 DIV.

・When the memory segmentation function or roll mode is used, waveform

processing is not possible.

・For scaling see Section 9.4 of the 8835-01 Instruction Manual. ・When subjecting the memory waveform of the recorder and memory function

to waveform processing calculations, the recorder waveform data will be destroyed.

・Canceling waveform processing during loading data displays incomplete

calculation result. Press Execute again to reprocess calculation.

・When set to averaging, load waveform before executing waveform

processing.

────────────────────────────────────────────────────

5.2 Calculating Waveform Data

Page 92

)

────────────────────────────────────────────────────

.2.2 Defining the Processing Equation

Eight processing equations (Z1 - Z8) can be defined.

Making the processing equation

Method

Screen: STATUS 5 (MEM

Press the STATUS key to call up the

STATUS 5 screen. Move the flashing cursor to " Z1 to Z8". Use the function keys to select the

"enter equ".

Selection

：Enter equation. ：Delete equation. ：Copy equation.

Move the flashing cursor to the desired

item with the JOG control or the CURSOR

key, use the function keys to select the se

Use the function key to move the flashing

cursor within the equation.

Selection

：Enter the item into selected

equation.

：Move the equation cursor right. ：Move the equation cursor left. ：Delete character under cursor in

equation.

：Terminate equation input.

────────────────────────────────────────────────────

5.2 Calculating Waveform Data

Page 93

────────────────────────────────────────────────────

When the equations have been input, pres the F5 [ exit ] key. If there are any syntax errors in the equations (incomplete bracketing, missing " MOV, SLI, DIF, DIF2, INT, INT2 operators, etc.), a "?" is displayed, and the cursor rests on the error, so that the problem can be corrected. When there are no syntax errors, a "=" is displayed. Make settings for Z2 to Z8 as for Z1.

Operators (For details, see Appendix 3.3.)

ABS Absolute value DIF2 2nd differential EXP Exponential INT2 2nd integral LOG Logarithm SIN Sine SQR Square root COS Cosine MOV Moving average TAN Tangent SLI Parallel displacement o

time axis

DIF 1st differential ACOS Arc-cosine INT 1st integral ATAN Arc-tangent

ASIN Arc-sine

", more than eight

NOTE

・For multiplication, always use the " ・Out of the MOV, SLI, DIF, DIF2, INT, and INT2 operators, up to eight can

be used in the same equation (for example eight MOV operators or five MOV and three SLI operator, etc.).

・The maximum number of digits for a constant is 30. ・If division by 0 is specified (1/0), an overflow value is output. ・Equations are calculated in ascending order, from Z1 to Z8. ・The data that can be used in an operational equation (channel data and

results of operation) must be smaller than in the preset operation numbers (for example, Z3 and Z4 cannot be used on Z2).

" sign.

────────────────────────────────────────────────────

5.2 Calculating Waveform Data

Page 94

)

────────────────────────────────────────────────────

Entering the constant values

Method

Screen: STATUS 5 (MEM

Move the flashing cursor to the position

shown in the figure on the left. Use the function keys to select the enter.

The setting range is -9.9999E+29 to

+9.9999E+29 (exponent: -29 to +29).

Selection

：Value up

：Value down

：Enter the value using the numeric

keys.

Deleting an Equation

：Close entering constant.

Move the flashing cursor to the desired

item with the CURSOR key, enter the constant value with the function key or th JOG control.

Select exit after finishing entering

constant.

Method

Screen: STATUS 5 (MEM

Move the flashing cursor to one of the

Z1 - Z8 items. Press the F2 [ clear eqn ]. Make the setting with the function keys.

Selection

：Clear equation

：Do not clear equation

────────────────────────────────────────────────────

5.2 Calculating Waveform Data

Page 95

)

────────────────────────────────────────────────────

.2.3 Copying an Equation

An equation to which an equation number has been assigned (copy source) can be copied to another equation number (copy target).

Method

Screen: STATUS 5 (MEM

Move the flashing cursor to one of the Z1 -

Z8 items. Press the F3 [ copy eqn ]. Use the function keys or the JOG control

to specify the number of the equation to be

copied.

Selection

NOTE

：Increase equation number.

：Decrease equation number.

：Execute copy.

：Quit copy mode.

Press the F4 [ exec ] key. The copy sourc

equation is copied to the copy target.

The calculation result output destination and calculation formula settings (display scale and number of moved points) are not copied.

────────────────────────────────────────────────────

5.2 Calculating Waveform Data

Page 96

)

────────────────────────────────────────────────────

.2.4 Setting the Channel for Recording Processing Results

・The calculation result of equations Z1 - Z8 can be recorded and displayed in a

specified channel.

・Processing results can be recorded also in channels where no input unit is

installed (but the range of the "number of channels in use" setting cannot be exceeded).

Method

Screen: STATUS 5 (MEM

Move the flashing cursor to one of the Z1 -

Z8 items.

Move the flashing cursor to the position

shown in the figure on the left.

Use the function keys or the JOG control

to specify the number of the equation to be copied.

NOTE

Selection

：Move the cursor up in the selection

window.

：Move the cursor down in the

selection window.

Equations not to be used should be set to NONE (calculation result is not recorded).

・If the same channel is selected as source in the equation and as target for

recording, the waveform data in the source channel are overwritten by the equation calculation result.

・In the following cases, the calculation result is displayed with in the same

color set as the channel number for the first processing run:

If results are recorded in a channel where no input unit is installed.

If the display color for the channel selected for recording is set to OFF. When wishing to change the display color set, perform calculation once and then use the CHANNEL1 screen or DISPLAY screen to make the setting.

・The channel selected for recording is automatically set to variable display.

────────────────────────────────────────────────────

5.2 Calculating Waveform Data

Page 97

)

────────────────────────────────────────────────────

.2.5 Setting the Display Scale and Floating Decimal Point

Set the scale and floating decimal point.

・Set the scale to display the waveform of the processed result. ・Display scale can be set automatically or manually. ・The channel selected for recording is automatically set to variable display.

For the variable function, see Section 7.12 of the 8835-01 Instruction Manual.

Method

Screen: STATUS 5 (MEM

Move the flashing cursor to the settings

item, as shown in the figure on the left. The figure at the left shows the scaling window and movement point.

Select Expression Setting on the function

key display. The flashing cursor moves into the window.

Move the flashing cursor to the position

shown in the figure on the left.

Make the setting with the function keys.

Selection

：Set display scale automatically. ：Set display scale manually.

：Close setting.

Select Finish when finished setting.

Automatic setting

After calculation, the upper and lower limit is determined from the result, and the variable display settings are made accordingly. Depending on the type of calculation, automatically display scale setting may not be satisfactory. In such a case, use the manual setting procedure.

Manual setting

Use the variable display setting function on the CHANNEL 2 screen to set the upper and lower limit.

Calculation result with overflows

The values shown using cursors A and B and the printed values obtained when the printer recording type is set to "numerical value" are not accurate. If the display scale is set to "AUTO," the waveform is shown at the top or bottom of the screen. This indicates that the calculation result has overflowed.

────────────────────────────────────────────────────

5.2 Calculating Waveform Data

Page 98

)

────────────────────────────────────────────────────

Method

Screen: STATUS 5 (MEM

Move the flashing cursor to the settings

item, as shown in the figure on the left. The figure at the left shows the scaling window and movement point.

Select Expression Setting on the function

key display. The flashing cursor moves into the window.

Move the flashing cursor to the settings item, as shown in the figure on the left. Move the flashing cursor to the various digits and make the setting with the function keys or the JOG control. For MOV (moving average): 1 to 4000 For SLI (parallel displacement):

-4000 to +4000

Selection

：Value up ：Value up ：Close setting.

Select Finish when finished setting.

────────────────────────────────────────────────────

5.2 Calculating Waveform Data

Page 99

・Data recording starts when trigger condition are met.

recording starts, regardless of trigger state.

・Press the START key and LED light.

trigger is shown on the display.

・Displays "Storing".

executed.)

・Auto print ：ON →Prints the measurement data.

Auto save ：ON →Saves the measurement data.

・Displays "Waveform calculating".

・Displays waveform calculation result on the screen.

・End of measurement.

・Each time when trigger conditions are met, data are recorded

】

executed.)

────────────────────────────────────────────────────

.2.6 Performing Waveform Processing

Waveform processing while capturing the waveform (Process waveforms as they are input)

Measurement Start

Meeting the trigger condition

Storing measurement data

Waveform calculation

Displaying calculation result

Operating the result

・When the pre-trigger is set, the trigger will not be registered fo

a certain period after the start of measurement. (During this interval,

・When the trigger can be registered, the indication

・When trigger mode selected AUTO, unit waits for about 1

second for trigger conditions to be met. After this interval, data

Waveform displays after data corresponding to recording leng have been stored in memory.

・When the STOP

the 8835-01 is forcibly stopped. (Waveform calculation is not

・

Pre-trigger standby is shown on the display.)

Waiting for

key is pressed twice during measurement,

Measurement end

Trigger mode:SINGLE

Trigger mode:REPEAT

AUTO

NOTE

・The maximum recording length allowing waveform processing calculation is

1000 divisions.

・The waveform range to be processed can be set with the A/B cursors

(vertical or trace). The waveform between the cursors is processed.

・If the cursors are overlaid at one point, only that point is processed. ・The calculation range cannot be specified using the horizontal cursor. ・If only the A cursor is enabled, the range processed is from the A cursor to

the end of measured data.

and memory contents are overwritten.

【 End of measurement in REPEAT and AUTO trigger modes

・When the STOP key is pressed once during measurement,

the 8835-01 acquires measurement data in an amount corresponding to the set recording length, and the measureme is stopped. (Waveform display, Waveform calculation is

────────────────────────────────────────────────────

5.2 Calculating Waveform Data

Page 100

・Press the FILE key to call up the FILE screen.

(see Chapter 13 of the 8835-01 Instruction Manual.)

・This setting calculates the measurement data between A and B

When there is no A and B cursors, calculates all data.

・Printout can be carried out.

Saving can be carried out.

・Press the STATUS key to call up the STATUS4 screen. ・Displays waveform calculation result on the screen.

・Waveform calculation execute the stored measurement data.

・Move the flashing cursor to wave calculation. And use the

Displays "Waveform calculating".

────────────────────────────────────────────────────

Waveform processing of data in internal memory or media (Process previously input waveforms)

Select the calculating data

Loading from media

Internal memory data

Setting the calculating range

cursors.

Setting the items

Waveform calculation

Displaying calculation result

Operating the result

function key to select "exec".

・

Measurement end

Recorder and memory waveform processing calculations

After measuring with the recorder and memory function and switching to the memory recorder function, the memory waveform data are transferred to the memory recorder function. (Following this, the process is the same as processing in the case of the internal memory.) However, when subjecting the memory waveform of the recorder and memory function to waveform processing calculations, the recorder waveform data will be destroyed.

NOTE

・The maximum recording length allowing waveform processing calculation is

1000 divisions.

・The waveform range to be processed can be set with the A/B cursors

(vertical or trace). The waveform between the cursors is processed.

・When the cursors overlap, processing is carried out for that point. ・The line cursor (horizontal) cannot be used to specify the processing range. ・When only the cursor A is used, the waveform data from the position of

cursor A to the end of the data is calculated.

・The result can be recalculated by altering the calculation process.

────────────────────────────────────────────────────

5.2 Calculating Waveform Data

Hioki 9540-01 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual