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MR8740
Instruction Manual
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Hioki MR8740, MR8741 Instruction Manual

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Page 1
MR8740
MR8741
Instruction Manual
MEMORY HiCORDER
Oct. 2022 Revised edition 10 MR8740A982-10 22-10H
EN
[60039724A]
Page 2

Contents

Usage Index ...............................................................................1
Contents
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1
1
Introduction.................................................................................2
Confirming Package Contents....................................................3
Safety Information ......................................................................4
Operating Precautions................................................................8
Chapter 1
Overview __________________________________ 15
1.1 Product Overview ..............................................................15
1.2 Names and Functions of Parts ..........................................16
1.3 Display ..............................................................................18
1.4 Screen Configuration ........................................................19
1.5 Basic Operations ...............................................................22
1.5.1 Mouse Operations ..................................................................22
1.5.2 Mouse Right-click Menu .........................................................23
1.5.3 Mouse Left-click Operations ...................................................29
1.5.4 Mouse Wheel Operations .......................................................31
1.5.5 Waveform Operations .............................................................32
1.5.6 Measurement Operations .......................................................33
1.5.7 File Operations .......................................................................34
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MR8740A982-10
Chapter 2
Measurement Preparations___________________ 35
2.1 Installing and Removing Modules .....................................36
2.2 Connecting Cords .............................................................39
2.3 Recording Media Preparation ...........................................54
2.3.1 Storage Media (Inserting a USB Memory Stick) .....................54
2.3.2 Formatting Storage Media ......................................................55
2.4 Supplying Power ...............................................................56
2.4.1 Connecting the Power Cord ...................................................56
2.4.2 Turning the Power On and Off ................................................57
2.5 Setting the Clocks .............................................................58
2.6 Adjusting the Zero Position (Zero-Adjust) .........................59
2.7 Performing Calibration (When Mounting MR8990) ...........60
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Chapter 3
Measurement Procedure _____________________61
3.1 Measurement Workflow .................................................... 61
3.2 Pre-Measurement Inspection ............................................ 63
3.3 Setting Measurement Configuration ................................. 64
3.3.1 Measurement Function .......................................................... 64
3.3.2 Time Axis Range and Sampling Rate .................................... 66
3.3.3 Recording Length (number of divisions) 69
3.3.4 Screen Layout ........................................................................ 71
3.4 Input Channel Setting ....................................................... 72
3.4.1 Channel Setting Workflow ...................................................... 73
3.4.2 Analog Channel ..................................................................... 75
3.4.3 Logic Channel ........................................................................ 78
3.4.4 Display Sheet ......................................................................... 79
3.5 Starting and Stopping Measurement ................................ 80
Chapter 4
Saving/Loading Data & Managing Files _________ 83
4.1 Data capable of Being Saved & Loaded ........................... 85
4.2 Saving Data ...................................................................... 87
4.2.1 Save Types and Workflow ..................................................... 87
4.2.2 Automatically Saving Waveforms .......................................... 88
4.2.3 Saving Data Selectively (SAVE) ............................................ 93
4.2.4 Saving Example (Saving for Memory Division) ...................... 96
4.2.5 Save Waveform Output Data to the Media ............................ 98
4.3 Loading Data ....................................................................99
4.4 Managing Files ...............................................................102
4.4.1 Saving .................................................................................. 103
4.4.2 Checking the Contents of a Folder (Open a Folder) 105
4.4.3 Creating New Folders .......................................................... 105
4.4.4 Deleting Files & Folders ....................................................... 106
4.4.5 Sorting Files ......................................................................... 107
4.4.6 Renaming Files & Folders .................................................... 107
4.4.7 Copying a File Into a Specified Folder ................................. 108
Chapter 5
Printing __________________________________109
5.1 Printing Type and Workflow ............................................ 110
5.2 Making Auto Print Settings .............................................111
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5.3 Send PRINT key .............................................................112
5.4 Set the print contents ......................................................113
5.5 Miscellaneous Printing Functions ...................................116
5.5.1 Screen Hard Copy ................................................................116
5.5.2 Report Print (A4 Size Print) ..................................................116
5.5.3 List Print ................................................................................117
5.5.4 Text Comment Printing .........................................................117
Chapter 6
Waveform Screen Monitoring and Analysis ____ 119
6.1 Reading Measurement Values (Using the A/B Cursors) .120
6.2 Specifying a Waveform Range (A/B Cursor) ..................124
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6.3 Moving the Waveform Display Position ..........................125
6.3.1 About Display Position ..........................................................125
6.3.2 Scrolling the Measurement Waveform .................................125
6.3.3 Moving the Position ..............................................................126
6.4 Performing Waveform X-Y Synthesis .............................127
6.5 Magnifying and Compressing Waveforms ......................129
6.5.1 Magnifying and Compressing Horizontal Axis (Time Axis) ...129
6.5.2 Zoom Function (Magnifying a Section of the Horizontal Axis
(Time Axis)) ..........................................................................130
6.5.3 Magnifying and Compressing Vertical Axis (Voltage Axis) ...131
6.6 Monitoring Input Levels (Level Monitor) ..........................132
6.6.1 Level Monitor ........................................................................132
6.6.2 Numerical Value Monitoring (DMM Display) .........................133
6.7 Switching the Waveform Screen Display (Display Menu) 134
6.7.1 Showing Upper/Lower Limit On Waveform Screen ..............134
6.7.2 Showing Comments On Waveform Screen ..........................134
6.7.3 Switching the Waveform Display Width ................................135
6.7.4 Switching the Format (MR8741 Only) ..................................135
6.7.5 Changing the Monitor Values (MR8740 Only) ......................135
6.7.6 Switch the Displayed Sheet ..................................................135
6.8 Seeing Block Waveforms ................................................136
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Chapter 7
Utility Functions___________________________ 137
7.1 Adding Comments ..........................................................138
7.1.1 Adding a Title Comment .......................................................138
7.1.2 Adding a Channel Comment ................................................139
7.1.3 Alphanumeric Input ...............................................................141
7.2 Displaying Waveforms During Recording (Roll Mode) .... 145
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7.3 Displaying New Waveforms Over Past Waveforms
(Overlay) ......................................................................... 146
7.4 Converting Input Values (Scaling Function) ................... 148
7.4.1 Scaling Setting Examples .................................................... 150
7.5 Variable Function (Setting the Waveform Display Freely) .. 155
7.6 Fine Adjustment of Input Values (Vernier Function) ....... 158
7.7 Inverting the Waveform (Invert Function) ....................... 159
7.8 Copying settings to other channels (calculation No.)
(Copy function) ...............................................................160
7.9 Setting Details of Modules .............................................. 161
7.9.1 Setting the Anti-aliasing Filter (A.A.F) .................................. 162
7.9.2 Probe Attenuation Selection ................................................ 162
7.9.3 Setting Model 8967 TEMP Unit ............................................ 163
7.9.4 Setting Model 8969 and U8969 Strain Unit .......................... 165
7.9.5 Setting Model 8970 Freq Unit .............................................. 166
7.9.6 Setting Model 8971 Current Unit .......................................... 169
7.9.7 Setting Model 8972 DC/RMS Unit ....................................... 170
7.9.8 Setting Model MR8990 Digital Voltmeter Unit ...................... 171
7.9.9 Setting Model Model U8974 High Voltage Unit .................... 173
7.9.10 Setting Model U8979 Charge Unit ....................................... 174
7.9.11 Setting Model MR8790 Waveform Generator Unit .............. 177
7.9.12 Setting Model MR 8971 Pulse Generator Unit ..................... 179
7.9.13 Setting Model U8793 Arbitrary Waveform Generator Unit ... 181
7.10 Register the Waveform in
the U8793 Arbitrary Waveform Generator Unit ............... 184
7.11 Saving Waveforms Registered in
Model U8793 onto a Storage Device .............................. 188
7.12 Setting Output Waveform Parameters on
the Waveform Screen ..................................................... 188
Chapter 8
Trigger Settings ___________________________189
8.1 Setting Workflow ............................................................. 190
8.2 Setting the Trigger Mode ................................................ 191
8.3 Triggering by Analog Signals .......................................... 192
8.3.1 Analog Trigger Settings and Types ...................................... 192
8.4 Triggering by Logic Signals (Logic Trigger) .................... 197
8.5 Trigger by Timer or Time Intervals (Timer Trigger) ......... 199
8.6 Synchronizing Between Blocks (MR8740 Only) ............. 202
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8.7 Applying an External Trigger (MR8741 Only) .................203
8.8 Triggering Manually (Manual Trigger) .............................203
8.9 Pre-Trigger Settings ........................................................204
8.9.1 Setting the Trigger Start Point (Pre-Trigger) .........................204
8.9.2 Setting Trigger Acceptance (Trigger Priority) .......................206
8.10 Setting Trigger Timing .....................................................207
8.11 Setting Combining Logic (AND/OR) for
Multiple Trigger Sources .................................................208
8.12 Using trigger settings to search measurement data .......209
Chapter 9
Numerical Calculation Functions _____________ 211
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9.1 Numerical Calculation Workflow .....................................212
9.2 Settings for Numerical Value Calculation ........................214
9.2.1 Displaying Numerical Calculation Results ............................217
9.3 Judging Calculation Results ............................................218
9.3.1 Display of Judgment Results and Signal Output ..................220
9.4 Saving Numerical Calculation Results ............................221
9.5 Numerical Calculation Type and Description ..................223
Chapter 10
Waveform CalculationFunctions _____________ 227
10.1 Waveform Calculation Workflow .....................................228
10.2 Settings for Waveform Calculation ..................................231
10.2.1 Displaying the waveform calculation results .........................232
10.2.2 Setting constants ..................................................................234
10.2.3 Changing the display method for calculated waveforms ......235
10.3 Waveform Calculation Operators and Results ................237
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Chapter 11
Memory Division Function __________________ 241
11.1 Recording Settings ..........................................................243
11.2 Display Settings ..............................................................244
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Chapter 12
FFT Function______________________________ 247
12.1 Overview and Features ................................................... 247
12.2 Operation Workflow ........................................................ 248
12.3 Setting FFT Analysis Conditions ..................................... 249
12.3.1 Selecting the FFT Function .................................................. 249
12.3.2 Selecting the Data Source for Analysis ................................ 250
12.3.3 Setting the Frequency Range and Number of Analysis Points 251
12.3.4 Thinning Out and Calculating Data ...................................... 253
12.3.5 Setting the Window Function ............................................... 254
12.3.6 Setting Peak Values of Analysis Results ............................. 255
12.3.7 Averaging Waveforms .......................................................... 256
12.3.8 Emphasizing Analysis Results (phase spectra only) ........... 259
12.3.9 Analysis Mode Settings ........................................................ 260
12.3.10Setting the Display Range of the Vertical Axis (Scaling) ..... 264
12.3.11Setting and Changing Analysis Conditions on
the Waveform Screen .......................................................... 265
12.4 Selecting Channels ......................................................... 266
12.5 Setting Screen Displays .................................................. 267
12.5.1 Displaying running spectrums .............................................. 269
12.6 Saving Analysis Results ................................................. 272
12.7 Analysis with the Waveform Screen ............................... 273
12.7.1 Analyzing after Specifying an Analysis Starting Point .......... 273
12.8 FFT Analysis Modes ....................................................... 275
12.8.1 Analysis Modes and Display Examples ............................... 275
12.8.2 Analysis Mode Functions ..................................................... 293
Chapter 13
Waveform Evaluation Function(MR8741 Only) __ 295
13.1 Waveform GO/NG Evaluation (MEM, FFT Function) .....295
13.2 Setting the Waveform Area ............................................. 298
13.3 Setting the Waveform Evaluation Mode ......................... 300
13.4 Setting the GO/NG Stop Mode ....................................... 301
Chapter 14
System Environment Settings _______________309
13.5 Creating the Evaluation Area .......................................... 303
13.6 Editor Command Details ................................................. 304
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Chapter 15
Connection to a Computer __________________ 313
15.1 LAN Settings and Connection (Before Using FTP/
Internet Browser/Command Communications) ...............314
15.1.1 Making LAN Settings at the Instrument ................................314
15.1.2 Connecting Instrument and PC With LAN Cable ..................318
15.2 Performing Remote Operations on the Instrument
(Use an Internet Browser) ...............................................320
15.2.1 Making HTTP Settings on the Instrument .............................320
15.2.2 Connecting to the Instrument With an Internet Browser .......321
15.2.3 Operating the Instrument With an Internet Browser .............322
15.3 Accessing the Files on the Instrument From a Computer
(Using FTP) .....................................................................327
15.3.1 Making FTP Settings at the Instrument ................................328
15.3.2 Using FTP to Connect to the Instrument ..............................329
15.3.3 Using FTP for File Operations ..............................................330
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15.4 Wave Viewer (Wv) ..........................................................331
15.5 Controlling the Instrument with
Command Communications (LAN) .................................332
15.5.1 Making Settings on the Instrument .......................................333
15.6 Operating the instrument remotely and acquiring data by
using Model 9333 LAN Communicator ...........................334
Chapter 16
External Control (MR8741 Only) ______________ 335
16.1 Connecting External Control Terminals (MR8741 Only) .....336
16.2 External I/O (MR8741 Only) ............................................337
16.2.1 External Input (START/IN1) (STOP/IN2) (SAVE/IN3) ..........337
16.2.2 External Output (GO/OUT1) (NG/OUT2) ..............................338
16.2.3 External Sampling (SMPL) ...................................................340
16.2.4 Trigger Output (TRIG OUT) ..................................................341
16.2.5 External Trigger terminal (EXT.TRIG) ..................................342
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Chapter 17
Specifications_____________________________ 343
17.1 General Specifications of the Instrument ........................343
17.2 Measurement Functions .................................................346
17.2.1 Memory Function ..................................................................346
17.2.2 Recorder Function ................................................................346
17.2.3 FFT Function ........................................................................346
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17.3 Trigger Section ...............................................................347
17.4 File Specifications ........................................................... 348
17.5 Built-In Functions ............................................................ 349
17.6 Specifications of Modules ............................................... 352
17.6.1 8966 Analog Unit ................................................................. 352
17.6.2 8967 TEMP Unit .................................................................. 353
17.6.3 8968 High Resolution Unit ................................................... 354
17.6.4 8969 Strain Unit / U8969 Strain Unit .................................... 355
17.6.5 8970 Freq Unit ..................................................................... 356
17.6.6 8971 Current Unit ................................................................ 358
17.6.7 8972 DC/RMS Unit .............................................................. 359
17.6.8 8973 Logic Unit .................................................................... 360
17.6.9 MR8990 Digital Voltmeter Unit ............................................. 361
17.6.10 U8974 High Voltage Unit .................................................... 362
17.6.11 U8979 Charge Unit ............................................................. 364
17.6.12 U8793 Arbitrary Waveform Generator Unit ......................... 367
17.6.13 MR8790 Waveform Generator Unit .................................... 369
17.6.14 MR8791 Pulse Generator Unit ............................................ 370
Chapter 18
Maintenance and Service ___________________ 373
18.1 Troubleshooting .............................................................. 374
18.2 Initializing the Instrument ................................................376
18.2.1 Initializing System Settings (System Reset) ........................ 376
18.2.2 Initializing Waveform Data ................................................... 376
18.3 Error Messages ..............................................................377
18.4 Self-Test (Self Diagnostics) ............................................ 380
18.4.1 ROM/RAM Check ................................................................ 380
18.4.2 Display Check ...................................................................... 381
18.4.3 System Configuration Check ............................................... 381
18.5 Updating the Instrument ................................................. 382
18.6 Cleaning .......................................................................... 384
18.7 Disposing of the Instrument (Lithium Battery Removal) . 385
Appendix ________________________________ A 1
Appendix 1 Default Values for Major Settings................................A 1
Appendix 2 Reference....................................................................A 2
Appendix 2.1 Waveform File Sizes .................................................. A 2
Appendix 2.2 Setting Configuration and Image Data File Sizes ......A 5
Appendix 2.3 Timebase and Maximum Recordable Time ...............A 6
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Appendix 2.4 Maximum record length and number of divisions
(Memory division function) ........................................ A 7
Appendix 2.5 Time Axis Range and Sampling Rate of
MR8990 Digital Voltmeter Unit ................................... A 8
Appendix 2.6 Scaling Method When Using Strain Gauges ............. A 9
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Appendix 3 About Options........................................................... A 10
Appendix 3.1 Options .................................................................... A 10
Appendix 4 FFT Definitions ......................................................... A 14
Index ________________________________Index 1
2
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Page 12

Usage Index

1 Install & Connect
2 Make Instrument Settings
3 Measure
Install the instrument
Setting measurement configuration
Start recording
Analysis
Optionally save
5 Finish
Stop recording
4 Analyze and Save
Turn the power off
Catching Changes in Input Signals (p.189)
Applying a Manual Trigger (p.203)
Adding Comments (p.138)
Freely Setting the Waveform Display (p.72)
Converting Input Values (p.148)
Copying Settings to Other Channels (p.160)
Suppressing Noise (Low-pass filter) (p.77)
Composing X-Y Waveforms (p.127)
Scaling During Measurement Using a Current
Clamp (p.150)
Basic Workflow
(p.35)
(p.61)
(p.80)
(p.56)
(p.119)
Connect the cords
Install the modules
Install the recording paper
Turn power on
Select the function
Select the input channels
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Usage Index
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Introduction

Introduction
Thank you for purchasing the HIOKI "Model MR8740/MR8741 Memory HiCorder". To obtain maximum performance from the instrument, please read this manual carefully, and keep it handy for future reference.
The optional clamps ( p. A 10) collectively mean “clamp sensors.”
The following instruction manuals are available for this instrument. Refer to the relevant manual as usage.
Type Contents Print CD
Instruction Manual (this document)
Communication Command Instruction Manual
U8793, MR8790, MR8791 Instruction Manual
Contains details and specifications regarding the functions and operations of this instrument.
Contains a list of the communication commands and their explanations to control the instrument with a computer.
Contains specifications and explanations of functions/ operations of Models U8793 Arbitrary Waveform Genera­tor Unit, MR8790 Waveform Generator Unit, MR8791 Pulse Generator Unit, and SF8000 Waveform Maker.
—
—
—
Trademarks • Microsoft, Windows, Excel, and Internet Explorer are either registered trade-
marks or trademarks of Microsoft Corporation in the United States and other countries.
• CompactFlash is a registered trademark of SanDisk Corporation (USA).
• Sun, Sun Microsystems, Java, and any logos containing Sun or Java are trademarks or registered trademarks of Oracle Corporation in the United States and other countries.
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Confirm that these contents are provided. (One each)
Instruction Manual (this document)
Application disc
*1
(p.331)
• SF8000 Waveform Maker
• Wave Viewer (WV)
• Communication Command Instruction Manual
• U8793, MR8790, MR8791 Instruction Manual
*2
MR8740 or MR8741 Memory HiCorder
Accessories
Power Cord
Rack mounting brackets (for EIA standard)
(Model MR8740 only)
Other options specified when ordered Options List ( p. A 10)
MR8740 MR8741
*1: The latest version can be downloaded from our website. *2: If one or more Model 8967 Temp Units are installed in the instrument, two ferrite clamp-on chokes (small) will be
supplied per module.

Confirming Package Contents

Confirming Package Contents
When you receive the instrument, inspect it carefully to ensure that no damage occurred during shipping. In particular, check the accessories, panel switches, and connectors. If damage is evident, or if it fails to operate according to the specifications, contact your dealer or Hioki representative.
If the 8967 TEMP Unit is installed in the MR8740/MR8741, two ferrite clamp-on chokes (small) will be supplied per unit.
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Safety Information

Safety Information
This instrument and modules are designed to conform to IEC 61010 Safety Standards, and has been thoroughly tested for safety prior to shipment. How­ever, using the instrument in a way not described in this manual may negate the provided safety features. Before using the instrument, be certain to carefully read the following safety notes:
Mishandling during use could result in injury or death, as well as damage to the instrument. Be certain that you understand the instructions and precautions in the manual before use.
With regard to the electricity supply, there are risks of electric shock, heat gener­ation, fire, and arc discharge due to short circuits. If anyone who is unfamiliar with electrical measuring instruments will use the instrument, a person familiar with such instruments must supervise operations.
Protective Gear
This instrument is measured on a live line. Wear the insulating protective gear according to the regulation to avoid electric shocks.
Notation
In this document, the risk seriousness and the hazard levels are classified as follows.
Indicates that incorrect operation presents an extreme hazard that could result in serious injury or death to the user.
Indicates that incorrect operation presents a significant hazard that could result in serious injury or death to the user.
Indicates that incorrect operation presents a possibility of injury to the user or damage to the instrument.
Indicates advisory items related to performance or correct operation of the instrument.
Indicates a high voltage hazard. If a particular safety check is not performed or the instrument is mis­handled, this may give rise to a hazardous situation; the operator may receive an electric shock, be burnt or even be fatally injured.
*
Indicates that descriptive information is provided below.
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Symbols Affixed to the Instrument
Indicates cautions and hazards. When this symbol is printed on the instrument, refer to the corresponding topic in this Instruction Manual.
Indicates the ON side of the power switch.
Indicates the OFF side of the power switch.
Indicates DC (Direct Current).
Indicates AC (Alternating Current).
Indicates a grounding terminal.
Indicates a fuse.
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Safety Information
Other Symbols
Symbols in This Manual
(p. )
*
[ ]
Indicates the prohibited action.
Indicates the location of reference information.
Indicates quick references for operation and remedies for troubleshoot­ing.
Indicates that descriptive information is provided below.
Menus, commands, dialogs, buttons in a dialog, and other names on the screen and the keys are indicated in brackets. Unless otherwise specified, "Windows" represents Windows 7, Windows 8, and Windows 10.
Indicates Memory function support.
Indicates FFT Recorder function support.
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Safety Information
Mouse Operations
Click: Press and quickly release the left button of the mouse.
Right-click: Press and quickly release the right button of the mouse.
Double-click: Quickly click the left button of the mouse twice.
Drag: Move the mouse while holding down the left button of the
mouse, and then release the button at the desired position.
Activate: Click on a screen to activate that screen.
Accuracy
We define measurement tolerances in terms of f.s. (full scale) values, with the following meanings:
f.s. (maximum display value or scale length)
The maximum displayable value or scale length. In this instrument, the maxi­mum displayable value is the range (V/div) times the number of divisions (20) on the vertical axis. Example: For the 1 V/div range, f.s. = 20 V
rdg. (reading value, displayed value, or indicated value)
The value currently being measured and indicated on the measuring instrument.
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Measurement categories
To ensure safe operation of measuring instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as CAT II to CAT IV, called measurement categories.
• Using a measuring instrument in an environment designated with a higher­numbered category than that for which the instrument is rated could result in severe accidents, and must be carefully avoided.
• Using a measuring instrument that has no category rating in an environment designated with the CAT II to CAT IV category could result in severe accidents, and must be carefully avoided.
CAT II When directly measuring the electrical outlet receptacles of the primary
CAT III When measuring the primary electrical circuits of heavy equipment
CAT IV When measuring the circuit from the service drop to the service
7
Safety Information
electrical circuits in equipment connected to an AC electrical outlet by a power cord (portable tools, household appliances, etc.)
(fixed installations) connected directly to the distribution panel, and feed­ers from the distribution panel to outlets
entrance, and to the power meter and primary overcurrent protection device (distribution panel)
The applicable measurement category is determined by the module being used. Refer to "17.6 Specifications of Modules" (p.352).
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Rear
At least 5 cm
At least 5 cm on the left and right sides

Operating Precautions

Operating Precautions
Before Use
Follow these precautions to ensure safe operation and to obtain the full benefits of the various functions.
If connection cables or instrument are damaged, there is a risk of electric shock. Before using the instrument, perform the following inspection.
• Before using the instrument, check that the insulation of the connection cables is not damaged and that no metal parts are exposed. Using the instrument under such conditions could result in electric shock. Replace the connection cable with those specified by our company.
• Verify that it operates normally to ensure that no damage occurred during stor­age or shipping. If you find any damage, contact your authorized Hioki distribu­tor or reseller.
Installing the instrument and modules
Installing the instrument and modules in inappropriate locations may cause a malfunction of instrument or may give rise to an accident. Avoid the following locations:
• Exposed to direct sunlight or high temperatures
• Exposed to corrosive or combustible gases
• Exposed to a strong electromagnetic field or electrostatic charge
• Near induction heating systems (such as high-frequency induction heating sys­tems and IH cooking equipment)
• Susceptible to vibration
• Exposed to water, oil, chemicals, or solvents
• Exposed to high humidity or condensation
• Exposed to high quantities of dust particles
Do not place the instrument on an unstable table or an inclined place. Knockin­gover or dropping the instrument can damage the instrument.
Installing To prevent overheating, be sure to leave the specified clearances around the unit.
• The instrument should be operated only with the bottom side downwards.
• Vents must not be obstructed.
• Do not install the instrument at a slanted angle.
When mounting the instrument in a system rack, make sure the operating tem­perature range of the instrument will not be exceeded.
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Handling the Instrument and Modules
• Do not exceed the range of the specifications and the rated value of the cable or the module. Otherwise, the instrument may be damaged or may produce heat, resulting in personal injury. The maximum rated voltage to earth does not change when an attenuator or similar is used at the input. Take the connection method into consideration and make sure that the rating is not exceeded.
• To avoid electric shock, do not remove the instrument’s cover and the module case. The internal components of the instrument carry high voltages and may become very hot during operation.
• It is recommended to measure the secondary side of a distribution panel with the U8974 High Voltage Unit. Do not connect the connection cords on the pri­mary side of the distribution panel because an unrestricted current flow can damage the connection cords and facilities if a short-circuit occurs.
9
Operating Precautions
• Each channel of Model U8979 Charge Unit has the BNC terminal and minia­ture connector each of the terminals simultaneously to avoid a short-circuit.
• Setting the measurement mode to [PreAmp] allows Model U8979 Charge Unit to constantly provide power (3.0 mA, 22 V) to sensors. Set any measurement mode other than [PreAmp] or tum off the instrument before connecting a sen­sor or probe with a BNC terminal to avoid an electric shock or damage to the measurement target.
• To avoid electric shocks, confirm that the instrument is turned off and the con­nection cables are disconnected before removing or replacing a module.
• To avoid electric shocks, do not operate the instrument with a module removed. To use the instrument after removing a module, install a blank panel over the opening of the removed module.
• To prevent instrument damage or electric shocks, use only the screws for securing the module in place that shipped with the instrument. If you lose any screw or find that any screws are damaged, please contact your Hioki distributor for a replacement.
• Model U8979 Charge Unit has miniature connectors with the maximum input charge of ±500 pC (for six higher-sensitivity range) or ±50,000 pC (for six lower-sensitivity range). Inputting a charge that exceeds these value causes damage to the instrument.
• Use an acceleration specification of Model U8979 (3.0 mA, 22 V). Using a inapplicable sensor may cause damaging itself.
• To avoid damage to the instrument, protect it from physical shock when trans­porting and handling. Be especially careful to avoid physical shock from drop­ping.
• The mounting screws must be firmly tightened or the module may not perform as specified or may fail.
• To avoid damaging modules, do not touch the module connectors on this instrument.
terminal with the common ground. Do not connect cords with
sensor with a built-in pre-amplifier that conforms to the
Page 21
10
Operating Precautions
Handling Media
• Before transporting the instrument, disconnect all cables and USB memory sticks.
• When there is no input, the waveform might be unstable due to the induced voltage, but this is not an error.
• This instrument may cause interference if used in residential areas. Such use must be avoided unless the user takes special measures to reduce electro­magnetic emissions to prevent interference to the reception of radio and televi­sion broadcasts.
• Do not remove the media while it is being accessed by the instrument. Data on the media could be lost.
• Do not turn off the power to the instrument while the media is being accessed by the instrument. Data on the media could be lost.
• Do not transport the instrument while a USB flash drive is connected. Damage could result.
• If damage occurs to the data on the media, we cannot restore or analyze the lost data. No compensation will be provided, regardless of the type or cause of the problem or damage.We therefore recommend maintaining a backup of any important data.
• Be careful to avoid inserting a media backwards or upside-down. The media or the instrument could be damaged.
• Never insert or eject a media while it is being accessed by the instrument. Data on the media could be lost.
• Do not operate the instrument at a slanted angle. It may not work properly.
• Do not transport the instrument while a USB memory stick is connected. Dam­age could result.
• Some USB memory sticks are susceptible to static electricity. Exercise care when using such products because static electricity could damage the USB memory stick or cause malfunction of the instrument.
• With some USB devices, the instrument may not start up if power is turned on while the device is inserted to the USB port. In such a case, turn power on first, and then insert the USB device. It is recommended to try out operation with a USB memory stick before starting to use it for actual measurements.
• Peculiar USB memory requiring fingerprint authentication or password cannot be used.
• When saving or loading data, insert the storage media before selecting it. If the media is not inserted, the file list display will not appear.
• All media (USB memory) have a limited service life. After extensive use over a long period, data retention and readout may become stop working. In that case, replace the card with a new one.
• Automatic saving of data is possible only on USB memory stick media.
• Use only Model Z4006 USB Drive sold by Hioki. Compatibility and perfor­mance are not guaranteed for USB flash drive made by other manufacturers.
Page 22
Before Connecting Cables
When measuring power line voltage
• Connecting cables should only be connected to the secondary side of a breaker Even if there is a short circuit on the secondary side of the breaker, the breaker cuts off the electric supply. Do not connect to the primary side of a breaker because unrestricted current flow could damage the instrument and facilities if a short circuit occurs.
• To prevent electrical shocks and personal injury, do not touch any input termi­nals on the VT (PT), CT or the instrument when they are in operation.
• Do not permanently connect the instrument in an environment where voltage surges exceeding the maximum input voltage may occur. Applying voltage may result in damage to the instrument, or a serious accident.
• Do not short-circuit two wires to be measured by bringing the connection cables into contact with them. Arcs or such grave accidents are likely to occur.
• To avoid short circuit or electric shock, do not touch the metal parts of the con­necting cable clips.
• To avoid electrical shocks, be careful to avoid shorting live lines with the con­nection cable clips.
11
Operating Precautions
• To avoid electric shock and short-circuit accidents, use only the specified test leads to connect the instrument input terminals to the circuit to be tested.
• To prevent an electric shock, confirm that the white or red portion (insulation layer) inside the cable is not exposed. If a color inside the cable is exposed, do not use the cable.
• The cable is hardened under the 0°C (32°F) or colder environment. Do not bend or pull cables in such environments to avoid tearing insulation or break­ing the cable.
Connecting to the BNC jacks on modules
• Do not use a metal BNC connector. If you connect a metal BNC cable to an insulated BNC connector, the insulated BNC connector can be damaged and the instru­ment may be damaged.
• To prevent cable damage, do not step on the cable or pinch them between other objects. Do not bend or pull cables at their base.
• Use only the specified connection cables. Using a non-specified cable may satisfy the specification requirements due to poor connection or other reasons.
• For detailed precautions and instructions regarding connections, refer to the instruction manuals for your modules, connection cables, etc.
Page 23
12
Measurement Object
Memory
HiCorder
Logic probe
Connect this instrument to the same outlet as the measurement object us­ing the (supplied) grounding polar­ized power cord.
ground to the GND terminal (functional earth terminal) of this instrument. (Always obtain power from the same mains circuit.)
Measurement Object
Logic probe
Functional Earth Termi­nals
GND
Memory
HiCorder
Operating Precautions
Before Connecting a Logic Probe to the Measurement Object
To avoid electric shock and short circuit accidents or damage to the instru­ment, pay attention to the following:
• The ground pin in the LOGIC connector (plug) of the Model 9320-01 and 9327 Logic Probes (and legacy Models 9306 and 9320) is not isolated
from this instrument’s ground (common ground). Use grounding-type polarized power cords for the measurement object and this instrument, and obtain power from the same mains circuit. Connecting to different mains circuits or using a non-grounding power cord may cause damage to the measurement object or this instrument because of current flow through the logic probes resulting from potential difference between the grounds of the different wiring systems. To avoid these problems, we recommend the following connection pro­cedure:
Before Turning the Power Supply On
• To avoid electrical accidents and to maintain the safety specifications of this instrument, connect the power cord provided only to an outlet.ïï
• Before turning the instrument on, make sure the supply voltage matches that indicated on its power connector. Connection to an improper supply voltage may damage the instrument and present an electrical hazard.
• Avoid using an uninterruptible power supply (UPS), DC/AC inverter with rect­angular wave or pseudo-sine-wave output to power the instrument. Doing so may damage the instrument.
• To avoid damaging the power cord, grasp the plug, not the cord, when unplug­ging it from the power outlet.
Turn off the power before disconnecting the power cord.
Page 24
Operating Precautions
I/O terminals Maximum input voltage
START/IN1 -0.5 V to 7 V DC STOP/IN2 -0.5 V to 7 V DC SAVE/IN3 -0.5 V to 7 V DC GO/OUT1 50 V DC 50 mA 200 mW NG/OUT2 50 V DC 50 mA 200 mW SMPL -0.5 V to 7V DC TRIG OUT 50 V DC 50 mA 200 mW EXT.TRIG -0.5 to 7 V DC
Before Connecting to an External Device (model MR8741 only)
To avoid electrical hazards and damage to the instrument, do not apply voltage exceeding the rated maximum to the input terminals.
To avoid electric shock or damage to the equipment, always observe the follow­ing precautions when connecting to external control terminals.
• Always turn off the power to the instrument and to any devices to be connected before making connections.
• Be careful to avoid exceeding the ratings of external terminals and connectors.
• The external control terminal shares the ground with the chassis. As required, isolate the devices and systems to be connected to the external control termi­nals from one another.
13
• The ground pins of external control connectors are not isolated from the instru­ment’s ground. Connect so that no potential difference arise between external control connector ground and the ground of the connection object. Failure to observe this precaution can result in damage to the connection object and the instrument.
• To avoid damage, do not disconnect the communications cable while the instrument is sending or receiving data.
• Use a common ground to both the instrument and the connected equipment. Using different ground circuits will result in a ground potential difference between the instrument and the connected equipment. If the cable is con­nected while such a potential difference exists, it may result in equipment mal­function or failure.
• Before connecting or disconnecting any cable, always turn off the instrument and your device to be connected. Failure to do so could result in an equipment malfunction or damage to the equipment.
• After connecting the communications cable, tighten the screws on the connec­tor securely. Failure to secure the connector could result in equipment mal­function or damage.
MR8740 does not support external control.
Page 25
14
Operating Precautions
Disc precautions
• Keep the recorded side of discs free of dirt and scratches. When writing text on a disc’s label, use a pen or marker with a soft tip.
• Keep discs inside a protective case and do not expose to direct sunlight, high temperatures, or high humidity.
• Hioki is not liable for any issues your computer system experiences in the course of using this disc.
Precautions During Shipment
Keep the packing material that was used for shipping this instrument because you may need to use it when transporting the instrument in the future.
Page 26
15
Simultaneous multi-chan­nel measurement
Measure up to 54 analog channels.
Ideal for mounting in a rack
Height: 4U (178 mm) or less
All channels isolated
High-speed sampling: 20 MS/s
Enables responsive evaluation and analysis.
MR8740 MR8741
Multi-channel waveform genera­tion

1.1 Product Overview

1

Overview Chapter 1

1.1 Product Overview
The Memory HiCorder is easy to operate and allows quick and efficient measurement and analysis. Major applications include error monitoring and inspection lines. The product offers the following features.
Chapter 1 Overview
Page 27
16
Front
Rear
Various Modules (p.36), (p.39)
(For details, see the instruction manual of the respective module.)
Power Inlet
Connect the supplied power cord here. (p.56)
POWER Switch
Turns the instru­ment on and off.
: Power On : Power Off
(p.57)
100BASE-TX Connector
Connect LAN cables here. (p.313)
DVI-D Connectors
Connect an LCD monitor here.
Standard LOGIC Terminals
Input connectors for optional logic probes. (p.39)
USB Connector (Type A)
Connect USB memory sticks here. (p.54)
Power Indicator
Lit when the instru­ment is on.
USB Connector (Type A)
Connect USB memory sticks here. (p.54)

1.2 Names and Functions of Parts

1.2 Names and Functions of Parts
MR8740
Page 28
17
Rear
Various Modules
(p.36), (p.39) (For details, see the instruc-
tion manual of the respective module.)
100BASE-TX Connector
Connect a LAN cable here. (p.313)
Standard LOGIC Terminals
Input connectors for optional logic probes. (p.39)
Power Indicator
Lit when the instru­ment is on.
DVI-D Connector
Connect an LCD monitor here.
USB Connector (Type A)
Connect USB memory sticks here. (p.54)
Manufacturer's Serial No.
*
Shows the serial number. Required for production control. Do not peel off the label.
POWER Switch
Turns the instrument on and off.
: Power On : Power Off (p.57)
Power Inlet
Connect the supplied power cord here. (p.56)
Ventilation Holes (Fan)
Make sure the ventilation holes are not obstructed.
Front
External control terminals
Input any external sampling signal here. (p.336) Allows control of the instrument.
*: The serial number consists of 9 digits. The first two
(from the left) indicate the year of manufacture, and the next two indicate the month of manufacture.
1.2 Names and Functions of Parts
MR8741
1
Chapter 1 Overview
Page 29
18
Connect the LCD monitor to a DVI-D connector on the front of the instrument.

1.3 Display

1.3 Display
This instrument allows you to use a commercially available LCD monitor for displaying waveforms and various settings.
• The instrument’s DVI connectors are designed exclusively for digital. They cannot be used for analog. A VGA-DVI adapter also cannot be used.
• There are a variety of LCD monitors available, and not all LCD monitors will work with the instrument.
• The display aspect ratio for DVI output with this instrument is 4:3. If you use a wide LCD (16:9), display will be stretched in the horizontal direction.
• External interference may cause display to be distorted. Keep the LCD and LCD cable as far away as possible from sources of interference.
• MR8740 displays the waveforms of the block I side (32 analog channels + 8 logic channels) with DVI-I, and the waveforms of the block II side (22 analog channels + 8 logic channels) with DVI-II. The waveforms of block I and block II cannot be displayed at the same time.
Page 30
19
Status Screen
This screen is for making settings for the measurement method and numerical calcula­tion of waveform data.
There are the following sheets: [Status] sheet, [Num Calc] sheet, [Memory Div] sheet, [Wave Calc] sheet
STATUS
Waveform Screen
This screen is for observing waveforms. The settings window on the right shows the measurement parameters.
Trigger Settings Window/Channel Settings Window
This window is for making the advanced settings for triggers.
This window is for making the advanced settings for analog channels and logic channels.
Channel Screen
This screen is for making channel settings, scaling settings, and comment settings.
There are the following sheets: [Unit List] sheet, [Each Ch] sheet, [Scaling] sheet,
[Comment] sheet
System Screen
This screen is for making settings for the environment, file saving, and communication, and for performing data initialization.
There are the following sheets: [Environment] sheet, [File Save] sheet, [Printer] sheet,
[Interface] sheet, [Init] sheet
File Screen
This screen is for viewing the data files on media (USB memory stick and internal memory).
DISP
TRIG.SET
CH.SET
CHAN
SYSTEM
FILE

1.4 Screen Configuration

1.4 Screen Configuration
The screen configuration is shown below. Click an item with the mouse to display the corresponding screen. On the Waveform screen, the trigger settings window and channel settings window can be displayed.
1
Chapter 1 Overview
Page 31
20
Logic waveform (p.78)
Analog waveform (p.75)
Storage counter
Shows how many trigger events occurred. (p.81)
Current date and time
Shows the set date and time. (p.58)
Settings cursor
The current cursor lo­cation is indicated by flashing.
Title comment
Shows the set title com­ment. (p.138)
Tri gge r marker
Shows the point where the trigger event occurred. (p.189)
Settings window
Set the measurement pa­rameters here. (p.64)
Trigger time
Shows the date and time of the last trig­ger event. (p.189)
Vertical axis display
Shows the value per increment for each channel. This is linked to the vertical axis (voltage axis) range setting. (p.75)
Upper and lower limits
The upper and lower limit values for each channel are shown here. (p.134)
Scroll bar
The stored waveform is indicated by a red bar, and the displayed waveform by a blue frame. (p.125)
Media icon
Shows the media status. (p.54)
Operation icons
Left-click to scroll the wave­form or operate the A/B cur­sors.
Display and setting icons
Left-click to display the waveforms and numerical values or make channel settings.
1.4 Screen Configuration
Explanation of Screen Contents __________________________________
Waveform Screen
Page 32
21
Sheet tabs
Shows the names of sheets that can be selected.
Click a tab to switch to the corresponding sheet.
Hint
Shows an explanation about the item where the settings cursor is currently located. Messages such as "Online" and error messages are also shown here.
Next Page
This is shown if there are more than six se­lection items.
Selecting this button displays the other items.
1.4 Screen Configuration
Elements common to the Status screen, Channel screen, System screen, and File screen
1
Chapter 1 Overview
Page 33
22
Right-click
Displays a menu with a list of screens. Grayed-out screens cannot be dis­played.
Center wheel
Changes the selected item.
On the File screen, you can use the center wheel to change the selected file. When measuring with memory division, you can use the center wheel to change the displayed block.
On the Waveform screen, you can use the center wheel to scroll the waveform or move the A/B cursors.
Left-click
Left-click to select menus and to select items on menus. When measuring with memory di­vision, you can change the displayed block by double-clicking. Click the current path shown on the File screen to move one level up in the folder hier­archy.
Up/down/left/right
Moves the mouse cursor up, down, left, and right on the screen.
Convenient features: Shortcut operations
Drag the mouse in any of the following directions while the right mouse button is held down to perform the corre­sponding shortcut operation.
　Drag right: START operation
　Drag left: STOP operation
　Drag up: ESC operation

1.5 Basic Operations

1.5 Basic Operations
You can use a mouse to make various settings on the instrument. This section explains how to per­form mouse operations.

1.5.1 Mouse Operations

Use a commercially available USB mouse to operate the instrument.
• There are a variety of mice available, and not all mice will work with the instru-
ment.
• The instrument's USB ports are designed exclusively for use with mice and
USB memory sticks. Do not connect any other type of device.
• With some USB devices, the instrument may not start up if the power is turned
on while the USB device is connected to a USB connector. If that happens, connect the USB device after turning on the power.
• When the instrument is operated with a mouse, some screens may not display
properly.
• External interference may cause the mouse to malfunction. Keep the mouse
and mouse cable as far away as possible from sources of interference.
• Do not use a USB hub because mouse operation may not be possible. Also,
do not connect two mice.
The following describes how to operate the instrument with a mouse:
Page 34
23
1
Waveform screen
Click [DISP] to display the Waveform screen. If the Waveform screen is already displayed, the GUI menu on the right of the screen changes each time you click this item. Alternatively, you can change the GUI menu on the right of the screen when the Waveform screen is displayed by click­ing the [DISP] icon on the bottom right.
1
1.5 Basic Operations

1.5.2 Mouse Right-click Menu

Right-clicking with the mouse displays a list of screens. This section describes the menu and the screens that can be displayed.
DISP
1
Chapter 1 Overview
Page 35
24
1
Waveform display
This is the normal waveform display state. Move the cursor to [DISP] and then click any of the menu items under [CH.SET] to switch to one of the screens 2 to 5. Alternatively, you can click the [CH.SET] icon on the bottom right of the Waveform display screen to switch screens.
3
Display range 1/2
Displays the screen for setting the waveform dis­play range of the analog unit.
2
Analog channel 1/2
Displays the screen for setting the display position, etc. by setting the range for the analog unit.
5
Waveform calculation
Displays the screen for changing the display posi­tion or color of the calculation waveform when waveform calculation is set to ON.
4
Logic
Displays the screen for changing the display posi­tion or color of the logic waveform.
1
2
3
4
5
1.5 Basic Operations
CH.SET
Page 36
TRIG.SET
1
Waveform display
This is the normal waveform display state. Clicking
[TRIG.SET] switches between screens 1 to 3.
Alternatively, you can click the [TRIG.SET] icon on the bottom right of the Waveform display screen to switch screens.
3
Logic trigger
Displays the screen for setting the waveform dis­play range of the logic channel.
2
Analog trigger 1/2
Displays the screen for setting the trigger criteria of the analog unit.
1
2
3
25
1.5 Basic Operations
1
Chapter 1 Overview
Page 37
26
2
Numerical calculation
Displays the screen for setting the analysis of measured waveform data.
1
Status
Displays the screen for setting the basic items for measurement such as the time axis range.
4
Waveform calculation
Displays the screen for setting the application and analysis of addition, subtraction, multiplication, division, and other numerical calculations for waveform data.
3
Memory division
Displays the screen for setting the measurement of waveform data using the internal memory of the instrument divided.
1
2
3
4
1.5 Basic Operations
STATUS
Page 38
CHAN
2
Each channel
Displays the settings for each unit.
1
Unit list
Displays a list of plug-in units inserted into the instrument and their settings.
4
Comments
Displays the screen for setting a comment for each measurement channel.
3
Scaling
Displays the screen for setting the conversion of measurement values using linear functions.
1
2
3
4
27
1.5 Basic Operations
1
Chapter 1 Overview
Page 39
28
2
1
Environment
Displays the screen for setting the operating envi­ronment of the instrument.
2
File save
Displays the screen for setting the method for sav­ing measurement data.
4
Initialization
Displays the screen for clearing the settings of the instrument, setting the time, etc.
3
Interface
Displays the screen for the LAN communication setting conditions.
1
2
2
2
3
2
4
1.5 Basic Operations
SYSTEM
Page 40
29
1.5 Basic Operations

1.5.3 Mouse Left-click Operations

You can select menus and confirm items by left-clicking with the mouse. This section describes left-click operations for menu selection and settings.
Operations on a Settings Screen
Clicking a setting
When clicked, the setting becomes selected, the frame changes color, and the setting flashes.
Selecting a setting value from the GUI on the right of the screen
1
Chapter 1 Overview
You can change the setting by moving the mouse cursor to a selection item on the right of the screen and then clicking. The number of selection items differs depending on the setting.
Page 41
30
1.5 Basic Operations
Changing Pages on a Settings Screen
When settings are split into multiple pages, you can change the settings screen directly by clicking the displayed tabs.
With the tabs of the Waveform screen, clicking the currently selected tab again changes the dis­played channel.
Character Input
The menus displayed when inputting comments and calculation equations allow direct character input with click operations.
Page 42
31
1.5 Basic Operations

1.5.4 Mouse Wheel Operations

For an item with a list menu, you can change the setting item with the mouse wheel. You can also use the mouse wheel to scroll the display of a menu that has a scroll bar displayed.
Selecting from a list menu
For a setting with a selection item list displayed on the top right of the screen, you can use the wheel to change the setting item.
Scrolling a displayed list
You can use the wheel to scroll up and down a list.
1
Chapter 1 Overview
For details on wheel operation on the Waveform screen, refer to the next page.
Page 43
32
1.5 Basic Operations

1.5.5 Waveform Operations

You can scroll a waveform and change the cursor position on the Waveform screen.
Scrolling measured waveforms left or right
When the mouse cursor is in the Waveform screen, you can scroll the waveform by moving the mouse left or right while holding down the left mouse button (drag­ging). You can rotate the wheel button forward or backward to make fine scrolling adjustments. (If the waveform is not scrollable, click the [WAVE] icon on the top right of the Waveform display screen.)
Moving the A/B cursors
When the mouse cursor is in the Waveform screen, you can move the cursors by moving the mouse left or right while holding down the left mouse button (dragging). You can rotate the wheel button forward or backward to move the A/B cursors one sample at a time. (Click the [AB CSR] icon on the top right of the Wave­form display screen beforehand.) When the A/B cursors are in the Waveform screen, you can move the A or B cursor if you left-click the A or B mark.
Changing the displayed block
When the memory is divided, you can change the mea­surement block if you double-click the block number on the top of the screen. When the mouse cursor is in the block number, you can also change the measurement block number by rotating the mouse wheel button for­ward or backward. (If the displayed block is not displayed on the Waveform screen, click the [WAVE] icon on the top right of the Waveform display screen, and click [pos↔block] from the GUI menu on the right side of the screen.)
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33
1.5 Basic Operations

1.5.6 Measurement Operations

You can control the starting and stopping of measurement from the menu that is displayed by right­clicking.
Starting measurement
Click [START] to start measurement.
Stopping measurement
Click [STOP] to stop measurement.
Triggering manually
When the instrument is in a measuring state, you can click [MANUAL TRIG] to apply a trigger manually.
1
Chapter 1 Overview
You can also start and stop measurement as described below.
[START] Press the right mouse button, drag right, and then release the button.
[STOP] Press the right mouse button, drag left, and then release the button.
Page 45
34
1.5 Basic Operations

1.5.7 File Operations

You can change the displayed folder, load files, and perform other file operations on the File screen.
Moving to a folder
To move to a folder, double-click the folder to which you want to move. To move to the folder one layer up, click the folder path part.
Scrolling a file list
Click the bar on the right side of the screen to scroll a list. You can also scroll the list one item at a time by rotating the wheel button forward or backward.
Selecting the file to load
If you double-click the list, you can select the file to load.
Page 46
Measurement
Work Flow
1
Install this instrument (p.8)
2
Install or remove modules.
(When adding or replacing modules)
(p.36)
3
Connect a logic probe to the Standard LOGIC terminals
(When measuring logic signals)
(p.49)
4
Connect the input cable(s) to the input module
(When measuring analog signals)
(p.39)
Probes and cables will differ depending on the measurement purpose.
5
Connect an LCD monitor
(p.18)
6
Insert media (USB memory stick)
(p.54)
7
Connect the power cord
(p.56)
8
Turn the power on
(p.57)
9
Setting the clock
(p.58)
10
Perform zero-adjust
(p.59)
When preparations are complete, let's start a measurement (p.61)
Using communication functions
See: "Chapter 15 Connection to a Computer" (p.313)
Using external control functions
See: "Chapter 16 External Control (MR8741 Only)" (p.335)
Preparations Chapter 2
35
2
Chapter 2 Measurement Preparations
Page 47
36
Required item: One Phillips-head screwdriver
1
Turn the instrument's POWER switch Off.
2
With attention to the orientation of the module, in­sert it firmly all the way in.
Make certain that the labels on the module's panel face the same direction as the labels on the right side of the in­strument.
3
Using the Phillips screwdriver, tighten the two mod­ule mounting screws.
Installing a module
Front Side
Handle
(Example:8966)
Handle
Required item: One Phillips-head screwdriver
1
Turn the instrument’s POWER switch Off.
2
Remove any cables or thermocouples connected to the module.
3
Remove the power cord.
4
Using the Phillips screwdriver, loosen the two mod­ule mounting screws.
5
Grasp the handle and pull the module out.
Removing an module
Front Side
Blank panel
Measurements made without a blank panel installed may fail to meet specifications because of temperature instability within the instrument.
Front Side
Using the Phillips screwdriver, tighten the two mount­ing screws.
If not installing another module after removal

2.1 Installing and Removing Modules

2.1 Installing and Removing Modules
Read "Handling the Instrument and Modules" ( p.9) carefully.
Modules specified at the time the instrument is ordered are supplied preinstalled. Use the following procedures to add or replace modules, or to remove them from the instrument.
•Up to three logic units can be installed as units 1 to 8. Logic units installed as the other units cannot be used. Other 8973 Logic Unit being installed will be disabled.
• For information on the analog channel resolution when logic channels are used, see "7.9 Setting Details of Modules" (p.161).
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37
Analog channels only
Block I Block II
LA LB LA LB
[1:4] [1:4] [1:4] [1:4]
Mix including logic units
L7A L7B L7C L7D [1:4] [1:4] [1:4] [1:4]
Install the logic units at the module 1 to module 8 positions on both blocks. Even if you install logic units for module 9 and after, they will be invalid.
Ch1
Module 1
Ch2
Ch3
Module 2
Ch4
Ch15
Module 8
Ch16
Ch17
Module 9
Ch18
Ch19
Module 10
Ch20
Ch31
Module 16
Ch32
Ch17
Module 9
Ch18
Ch21
Module 11
Ch22
Block I Block II
Ch1
Module 1
Ch2
Ch3
Module 2
Ch4
Ch15
Module 8
Ch16
2.1 Installing and Removing Modules
About channel allocation
Information about the modules installed the instrument can be verified in the System Configuration list (p.346).
MR8740 The instrument has a two-block configuration consisting of Block I and Block II.
For each block, the module numbers are in order starting with one at the top, and the channel numbers are in order starting with one on the left of the module at the very top.
2
Chapter 2 Measurement Preparations
Page 49
38
Analog channels only
Ch1 Ch2
LA LB LC LD
[1:4] [1:4] [1:4] [1:4]
Module 1
Module 2
Module 3
Module 4
Module 5
Module 6
Module 7
Module 8
Mix including logic units
Ch3 Ch4
Ch15 Ch16
L7A L7B L7C L7D [1:4] [1:4] [1:4] [1:4]
2.1 Installing and Removing Modules
MR8741 The module numbers are in order starting with one at the left, and the channel
numbers are in order starting with one at the bottom of the module at the very left.
Page 50

2.2 Connecting Cords

Applicable Modules
• 8966 Analog Unit
• 8968 High Resolution Unit
• 8972 DC/RMS Unit
• U8979 Charge Unit
Use to connect: Connection cords
• Model L9197 Connection Cord (Maximum input voltage: 600 V) Large alligator clip type
• Model L9198 Connection Cord (Maximum input voltage: 300 V) Small alligator clip type
• Model L9217 Connection Cord (Maximum input voltage: 300 V) For measuring BNC output
• L9790 Connection Cord (Maximum input voltage: 600 V) Terminal type: Alligator, contact, grabber
Example: Terminal type: Alligator
• Model 9166 Connection Cord (Maximum input voltage: 30 V AC, 60 V DC) Electrical clips
When a voltage to be measured exceeds a maximum input rating of a module being used
• Model 9322 Differential Probe
*1
• Model 9665 10:1 Probe
• Model 9666 100:1 Probe
• Model P9000-01/-02 Differential Probe
*2
Example: Model P9000-02 Differential Probe
Measuring Voltage
Connect to the BNC jack on a module.
*1 An optional power cord or AC adapter is
required.
*2 An optional AC adapter or a commercially
available USB cable is required.
2.2 Connecting Cords
Read "Before Connecting Cables" ( p.11) carefully. For detailed precautions and instructions regarding connections, refer to the instruction manuals for your modules, connection cables, etc.
39
2
Chapter 2 Measurement Preparations
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40
Example: Model 8966 Analog Unit
Required item: One of the above cables
BNC jack
Connect to BNC jack
Lock
Bayonet rugs on the module
BNC plug slots
Connect to the measurement object
Connecting the cable
1
Connect the BNC plug on the cable to a BNC jack on the module.
2
Align the slots in the BNC plug with the guide pins on the jack on the mod­ule, then push and twist the plug clockwise until it locks.
3
Connect the cable clips to the mea­surement object.
Disconnecting BNC connectors Push the BNC plug, twist it counter-
clockwise, and pull it out.
2.2 Connecting Cords
Page 52
Applicable Modules
• Model 8970 Freq Unit
Use to connect: Connection cords
• Model L9197 Connection Cord
(Maximum input voltage: 600 V) Large alligator clip type
• Model L9198 Connection Cord
(Maximum input voltage: 300 V) Small alligator clip type
• Model L9217 Connection Cord
(Maximum input voltage: 300 V) For measuring BNC output
• Model L9790 Connection Cord (Maximum input voltage: 600 V) Terminal type: Alligator, contact, grabber
Example: Terminal type: Alligator
If the voltage to be measured exceeds the maximum input rating of the module being used
• Model 9322 Differential Probe
*1
• Model 9665 10:1 Probe
• Model 9666 100:1 Probe
• Model P9000-01/-02 Differential Probe
*2
Example: Model P9000-02 Differential Probe
Measuring Frequency, Number of Rotations and Count
Connect to the BNC jack on a module.
*1 An optional power cord or AC adapter is re-
quired.
*2 An optional AC adapter or a commercially
available USB cable is required.
Refer to (p.40) for details about connecting to BNC terminals.
41
2.2 Connecting Cords
2
Chapter 2 Measurement Preparations
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42
Applicable Modules
• Model 8967 TEMP Unit
Use to connect: Thermocouple
(Compatible wire: AWG 16 to 26, 0.4 to 1.2 mm diameter)
Connect to terminal block
Measuring Temperature
Connect to the terminal block on the input module.
Terminal Block
Connection Holes
Insert to terminal block
Outer Insulation
10 mm
25 mm
Thermocouple single wires
Inner insulation
Attach to the measurement object
Inserting a Thermocouple
2
1
3
4
5
1
Strip insulation from the thermocouple wires as shown at the left.
Stripping length: approx. 10 mm
2
Push the blade of a flat screwdriver into the button on the terminal block of the module.
3
Insert each thermocouple wire into the appropriate terminal hole while press­ing the button.
Confirm proper polarity.
4
Release the button.
The thermocouple is connected.
5
Attach to the measurement object.
To remove the thermocouple Hold the button while pulling the ther-
mocouple wire out.
Required item: Thermocouple, Ferrite clamp-on choke (8967’s option), flat-blade screwdriver (2.6-mm blade) Recommended wire: Compatible wire:Single-strand thermocouple wire, 0.4
to 1.2-mm diameter Stripping length:10 mm
2.2 Connecting Cords
If surrounding equipment is affected by noise, coil the ther­mocouple several times and then attach the included ferrite clamp-on choke (as seen in the diagram to the right).
Page 54
2.2 Connecting Cords
Applicable Modules
• Model U8969 Strain Unit
• Model 8969 Strain Unit
The following device can be connected to the module.
• Strain Gauge Transducer (Not available from Hioki)
• Connect L9769 or 9769 Conversion Cable to the strain gauge
Measuring vibration or displacement with a strain gauge transducer
Connect a strain gauge transducer to a connector on Model U8969 Strain Unit via Model L9769 Conversion Cable; Mod­el 8969 Strain Unit via Model 9769 Conversion Cable.
Connect the strain gauge transducer to a measurement object.
Connecting the Model L9769
1
Insert Model L9769 into a connector of Model U8969 with the slot of the plug aligned with the outward indentation of the connector.
2
Insert the plug into the connector until they are locked together.
3
Connect Model L9769 to the strain gauge transducer.
4
Connect the strain gauge transducer to a measurement object.
Example: Connecting the strain gauge transducer to Model U8969 Strain Unit via Model L9769 Con­version Cable
Required items: Model L9769 Conversion Cable, strain gauge trans­ducer
Connect to module's terminal
Connect Model L9769 to the strain gauge transducer.
Applied voltage: bridge voltage of 2 V
Connector pin-out of the L9769 Conver­sion Cable on strain gauge transducer side
4
3
1
The metal shell is connected to the GND of the instrument.
Connector pin-out of the U8969
Pin Mark Description
A BRIDGE+ B INPUT+ C BRIDGE­D INPUT+ E FLOATING COMMON F SENSE+ G SENSE-
H, J N.C.
Pin Mark Description
A BRIDGE+, SENSE+
BINPUT­C BRIDGE-, SENSE­DINPUT+
E FLOATING COMMON
F, G N.C.
The metal shell is connected to the GND of the instrument.
How to disconnect Model L9769
Pull the sleeve of the plug gently, releasing the plug, and disconnect the cable.
2
Plug’s slot
Connector’s inden­tation
The instrument describes Model U8969 as “8969”.
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2
Chapter 2 Measurement Preparations
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44
Attach to the measurement object
Connecting the 9769
1
Connect the 9769 to a terminal on the module.
The orange section of the 9769 must face up.
2
Connect the strain gauge transducer to the conversion cable.
3
Attach to the measurement object.
Example: Connecting the 9769 Conversion Cable with the supplied conversion cable
Required item: 9769 Conversion Cable, strain gauge transducer
Connect to module's terminal
Connect to the strain gauge transducer
3
2
1
Applied voltage: bridge voltage of 2 V
Connector pin-out of the 9769 on strain
gauge transducer side
The metal shell is connected to the GND of Model 8969.
Connector pin-out of the 8969
(1 is on left when unit top side is facing up)
Pin No. Description
1 BRIDGE+ 2 SENSE+ 3 INPUT+ 4 INPUT­5 BRIDGE­6 SENSE­7 FLOATING COMMON
Pin Mark Description
A BRIDGE+
BINPUT­C BRIDGE­DINPUT+
E FLOATING COMMON
F, G N.C.
1234567
• Preforming measurement with a strain gauge requires a bridge box. Use a strain gauge and bridge box both of which are commercially available.
• The bridge box may be susceptible to the effect of noise. For more information about how to ground the bridge box, refer to its instruction manual or contact the manufacturer of the bridge box.
• Do not excessively bend the cable and the base between cable and connector, pull on them, nor twist them. Doing so may cause the conversion cable to break.
Model 8969 Strain Unit
2.2 Connecting Cords
Connection of Model L9769
• Pin F of the module end is connected with Pin A of the strain gauge transducer end.
• Pin G of the module end is connected with Pin C of the strain gauge transducer end.
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2.2 Connecting Cords
Measuring Current
• 8971 Current Unit cannot be used with MR8741.
• With MR8740, up to four 8971 Current Units can be used.
45
2
Current sensors that can be connected to the Model 8971 Current Unit
The following current sensors can be connected to the Model 8971 Current Unit. Connecting these current sensors requires one or two conversion cables.
Maximum
Model number Model name
9709 9709-05 CT9901 + 9318 Metal 9272-05 9272-10 9318 Plastic CT6841 CT6841-05 CT9901 + 9318 Metal CT6843 CT6843-05 CT9901 + 9318 Metal CT6844 CT6844-05 CT9901 + 9318 Metal CT6845 CT6845-05 CT9901 + 9318 Metal CT6846 CT6846-05 CT9901 + 9318 Metal CT6862 CT6862-05 CT9901 + 9318 Metal CT6863 CT6863-05 CT9901 + 9318 Metal CT6865 CT6865-05 CT9901 + 9318 Metal
CT6875 AC/DC Current Sensor
CT6876 AC/DC Current Sensor
AC/DC Current Sensor
Clamp on Sensor
AC/DC Current Probe
AC/DC Current Probe
AC/DC Current Probe
AC/DC Current Probe
AC/DC Current Probe
AC/DC Current Sensor
AC/DC Current Sensor
AC/DC Current Sensor
input current /
Frequency
500 A
DC to 100 kHz
20 A/200 A
1 Hz to 100 kHz
20 A
DC to 1 MHz
200 A
DC to 500 kHz
500 A
DC to 200 kHz
500 A
DC to 100 kHz
1000 A
DC to 20 kHz
50 A
DC to 1 MHz
200 A
DC to 500 kHz
1000 A
DC to 20 kHz
500 A
DC to 2 MHz
1000 A
DC to 1.5 MHz
Conversion cable for
8971
9318 Plastic
CT9901 + 9318 Metal
9318 Plastic
9318 Plastic
9318 Plastic
9318 Plastic
9318 Plastic
9318 Plastic
9318 Plastic
9318 Plastic
CT9901 + 9318 Metal
CT9901 + 9318 Metal
Connector
Chapter 2 Measurement Preparations
*1
*1: Metal connector (ME15W), plastic connector (PL23)
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46
Current sensors whose model number is without the suffix -05, which have a plastic connector (PL23), can be connected with Model 8971 Current Unit in combination with Model 9318 Conver­sion Cable*.
Those whose model number is with the suffix -05, which have a metallic connector, can be con­nected to Model 8971 Current Unit in combination with both the 9318 Conversion Cable* and the CT9901 Conversion Cable.
*1: Model 9318 Conversion Cable is an accessory of Model 8971 Current Unit.
Connecting a current sensor with Model 8971 Current Unit
Model 8971 Current Unit
Model 9318 Conversion Cable
1
2
1
Align the guides of the conversion ca­ble with those of the sensor connector on the module, and straightly insert the plug until it locks.
2
Align the guides of the current sensor to be used with those of the conver­sion cable connector, and straightly insert the plug until it locks.
The instrument automatically recognizes the model of the current sensor.
3
Clamp the current sensor around a line of a measuring object.
How to connect the cable and a sensor
1
Hold and pull the plastic collar of the conversion cable, which releases the lock, and the remove the connector.
2
Hold and pull the plastic collar of the current sensor, which releases the lock, and the remove the connector.
2.2 Connecting Cords
When measuring current with a 9018-50 Clamp On Probe
You can use a voltage measurement unit such as the 8966 Analog Unit to make measurements. For more information about how to configure the instrument for use in this type of application, see the example settings in "7.4.1 Scaling Setting Examples" (p.150).
Page 58
Acceleration sensor connectable with Model U8979
Measuring acceleration
Connect a acceleration sensor to Model U8979 Charge Unit.
Familiarize yourself with "Handling the Instrument and Modules" ( p.9) before connecting a current sensor.
Applicable Modules
• Model U8979 Charge Unit
The following device can be connected to the module.
• Acceleration sensor (Not available from Hioki)
1
Align the slots in the BNC connector of anacceleration sensor with the locking studs of a BNC connector on the module, and insert the connector.
2
Turn the BNC connector of the accel­eration sensor clockwise until it locks.
3
Attach the acceleration sensor with the built-in pre-amplifier to a measure­ment target.
Connecting a BNC-output acceleration sensor with a built-in pre-amplifier
Connecting an acceleration sensor with a built-in pre-amplifier
Model U8979 Charge Unit
Locking studs of module side Locking studs
BNC connector slots
Lock
1
2
Connecting an acceleration sensor other than a sensor with a built-in pre-amplifier
Convert the output connector into the BNC connector using a commercially available conversion con­nector or conversion cable to connect the sensor.
How to remove the acceleration sensor
Turn the BNC connector of the acceleration sensor counter-clockwise to release the lock and remove the connector.
Use an acceleration sensor with a built-in pre-amplifier that conforms to the specification of Model U8979 Charge Unit. Using an inapplicable sensor may cause damaging itself.
47
2.2 Connecting Cords
2
Chapter 2 Measurement Preparations
Acceleration sensor type Terminal the sensor is connected
to
With a built-in pre-amplifier BNC connector Charge output Miniature connector (#10-32) –
Drive power: 3.0 mA, 22 V
Note
Page 59
48
1
Align the screw of the miniature con­nector, and turn the connector clock­wise to tighten it.
2
Attach the charge-output acceleration sensor to a measurement target.
Connecting a charge-output acceleration sensor equipped with the miniature connector (#10-32)
Connecting a charge-output acceleration sensor
How to disconnect the current sensor
Turn the miniature connector counterclockwise, and then pull out the connector.
Tighten the screw
Model U8979 Charge Unit
Connecting a charge-output acceleration sensor equipped with a connector other than a miniature connector (#10-32)
Convert the output connector into the miniature connector (#10-32) using a commercially available conversion connector or conversion cable to connect the sensor.
2.2 Connecting Cords
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49
Use to connect: Logic Probe
• MR9321-01 Logic Probe
• 9320-01 Logic Probe
• 9327 Logic Probe
LOGIC terminal
Measuring Logic Signals
Applicable Modules
• Model 8973 Logic Unit
LA to LB (MR8740) and LA to LD (MR8741) are supplied as standard equip­ment with the instrument.
Read "Before Connecting a Logic Probe to the Measurement Object" ( p.12) carefully. For more information about logic probe specifications, see the instruction manual that came with the logic probe you plan to us
Connect to the measurement object
MR8740 Front Side
Example: Connecting the 9327 Logic Probe
1
Connect the logic probe by aligning the groves on the plug and a LOGIC terminal.
2
Connect to the measurement object.
Required item:Model 9327 Logic Probe
LOGIC terminals
2
1
Connect to LOGIC Terminals
MR8741 Front Side
2.2 Connecting Cords
2
Chapter 2 Measurement Preparations
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50
Applicable Modules
• Model MR8990 Digital Voltmeter Unit
Cables to connect: L2200 Test Lead
• L2200 Test Leads (Maximum input voltage: 1000 V)
Measuring Voltage with High Accuracy (Digital Voltmeter)
Connect to the banana jacks on a module.
1
Connect the test leads to the banana jacks on the module.
Connect the black lead to the L jack, and the red lead to the H jack. Make sure the test lead plugs are fully inserted into the jacks.
2
Connect the test leads to the object to be measured.
Required item: Test leads above
Banana jacks
Connect to banana jacks
Connect the leads to the object to be measured
Connecting the test leads
1
2
Red
Black
2.2 Connecting Cords
Page 62
Applicable Modules
• Model U8974 High Voltage Unit
Required item: Model L4940 Connection Cable Set
• Model L4940 Connection Cable Set: (Maximum input voltage: 1000 V)
High Voltage Measurement
Connect to the banana jacks on a module.
1
Connect the plug of the connection cable to the banana jacks on the module.
Connect the terminal and the plug of the same color.
2
Insert the accessory clip into cable clips.
3
Connect the cable clips to the mea­surement object.
Required item: Model L4940 Connection Cable Set
Banana jacks
To Connect to banana jacks
Connect the clip.
Connect the Connection cable
Accessory clips
Model L4934 Small Alligator Clip Set * Model L4932 is required when using
Model L4934.
Model L4935 Alligator Clip Set
Model L9243 Grabber Clip
Model L4936 Bus Bar Clip Set
Model L4937 Magnetic Adapter Set
Model L4932 Test Pin Set
L4934
+
Connect to the mea­surement object.
Red
Black
3
1
2
51
2.2 Connecting Cords
2
Chapter 2 Measurement Preparations
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52
Applicable Modules
• Model U8793 Arbitrary Waveform Generator Unit
• Model MR8790 Waveform Generator Unit
Required item: Model L9795-01 /L9795-02 Connection
Cableconnect: L2200 Test Lead
Output Waveform
Connect to the SMB jack on a module.
• Model L9795-01 Connection Cable (Electrical clips)
• Model L9795-02 Connection Cable (BNC output)
1
Insert the SMB connector of connection cable in the output terminal of the module until you hear a click.
2
Connect the cable clips to the object to which the waveform is being applied.
Required items: Connection cable mentioned above
Output terminal
To Connect to Output Terminals
Connect the Connection cable
To disconnect output connectors
Grip the head of the SMB connector (not the cable), and pull it out.
Output terminal
SMB connector
Connect to the object to which the waveform is being applied.
Example: Model U8793
1
2
2.2 Connecting Cords
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53
Applicable Module
• Model MR8791 Pulse Generator Unit
Required items: Commercially available cable
(Half-pitch 50 pins)
Output Pulse Waveform
Connect to the banana jacks on a module.
1
Connect the connection cable to Output Connector of module.
2
Connect the connection cable to the object to which the waveform is being applied.
Required items: Commercially available cable
To Connect to Output Connector
Connect the Connection cable
To disconnect output connectors
Hold the button of connection cable while pulling the connector.
Button
Connect to the object to which the waveform is being applied.
Output connector
Connection cable connector
Output connector
2
1
2.2 Connecting Cords
2
Chapter 2 Measurement Preparations
Output connector
10250-52A2PL: Sumitomo 3M products (SCSI-2 connector), (Centronics half-pitch 50 pin socket-contact) Refer to "Output Connector Specifications" ( p.371).
• Metal shell of the connector 10250-52A2PL is the same as GND of the instrument (frame GND).
• Use lock type connectors for connecting the harness and the connector.
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54
USB memory stick
Inserting a USB memory stick
Ensure correct orientation of the USB memory stick and push it all the way into the connector.
Remove a USB memory stick
Verify that the unit is not accessing the USB mem­ory stick (for saving or loading data, etc.). Then pull the USB memory stick out. (No special steps are required at the instrument.)
USB Connector (Type A)
• Do not connect any devices other than USB memory stick.
• Not all commonly available USB memory sticks are supported.
• To use a USB memory stick, suitable unit settings must be made, as described below.
Front Side
Back Side
MR8740
Front Side
MR8741

2.3 Recording Media Preparation

2.3 Recording Media Preparation
Read "Handling Media" ( p.10) carefully.

2.3.1 Storage Media (Inserting a USB Memory Stick)

Media icons Icons indicating the status of storage media are always shown at the top of the
screen.
: Media is inserted
: Media is inserted and selected as save target (Icon col-
or is red)
: Media is not inserted but selected as save target (Icon
color is black)
: The center part of the icon appears yellow while the
USB memory stick is being accessed.
Storage
Media
RAM
(Internal
memory)
USB
memory
stick
• Memory integrated in the unit is used. Only settings can be stored.
• Automatic saving of data is not possible.
Inserting procedure, Remarks, and Notes
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55
Procedure
To open the screen: Right-click and select [FILE] → File screen
1
Insert the storage media.
2
Select [Next Page]. Select [Format].
The flashing cursor moves to the [Format Target] item.
3
Select the storage media to format, and select [Exec].
The specified storage media is formatted.
A confirmation window will be displayed. Select [Yes] to proceed, or [No] to cancel.
2.3 Recording Media Preparation

2.3.2 Formatting Storage Media

Possible targets for formatting are USB memory stick, and internal memory. During the formatting process, a folder named "HIOKI_MR8740" or "HIOKI_MR8741" will be created.
Note that formatting used storage media deletes all the information on the stor­age media and that deleted information is unrecoverable.
2
Chapter 2 Measurement Preparations
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56
1. Connect the power cord to the power
inlet on the instrument.
2. Plug the power cord into the mains outlet.
Connection Procedure
Back Side
2
MR8740
MR8741

2.4 Supplying Power

2.4 Supplying Power
Read "Before Turning the Power Supply On" ( p.12) carefully.

2.4.1 Connecting the Power Cord

Connect the power cord to MR8740/MR8741 and plug it into an AC outlet.
Page 68

2.4.2 Turning the Power On and Off

Turn the POWER switch on ( | ).
The startup screen appears first, and then the Waveform screen is shown.
Power On
Turning Power On
Back Side
MR8740 MR8741
Power On
Turn the POWER switch off ( ).
When power is turned on again, the display appears with the settings that existed when power was last turned off.
Turning Power Off
Power Off
Recording Data
When the POWER switch is turned off, internal recorded data is erased. If you don't want to lose recorded data, save it first to a USB memory stick.
See: "Chapter 4 Saving/Loading Data & Managing Files" (p.83)
Before Turning Power Off
This section explains the correct procedure for powering the unit up or down.
57
2.4 Supplying Power
2
Chapter 2 Measurement Preparations
Before Starting Measurement
To obtain precise measurements, provide about 30 minutes warm-up after turn­ing power on to allow the internal temperature of the modules to stabilize. After that, perform zero adjustment before taking measurements.
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58
Date setting (Year, Month, Day)
Time setting (Hour, Minutes, Seconds)
Procedure
To open the screen: Right-click and select [SYSTEM] → [Init] sheet
1
Move the flashing cursor to the [Clock] item.
2
Select the digit to change and set the numeric value.
3
When you select [Apply] while the flashing cursor is on the [Clock] item, the clock is set to the current date and time values.
The date and time indication is shown at the top right of the screen.

2.5 Setting the Clocks

2.5 Setting the Clocks
Set date and time for the built-in clock as follows. The clock has an automatic calendar with leap year correction and 24-hour format. The functions listed below make use of the clock. Ensure that the clock is set correctly before using these functions.
• Measurement with timer-based trigger
• Saving measurement data
The instrument contains a built-in backup lithium battery, which offers a service life of about ten years. If the date and time deviate substantially when the instru­ment is switched on, it is the time to replace that battery. Contact your dealer or Hioki representative.
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59
• To obtain precise measurements, provide about 30 minutes warm-up after turning power on to allow the internal temperature of the modules to stabilize.
• Note that zero-adjust cannot be performed during a measurement.
• During zero-adjust, the mouse operation is disabled. (The procedure may take several seconds.)
Before starting zero-adjust
Procedure
To open the screen: Right-click and select [CHAN] → [Unit List] sheet
1
Move the flashing cursor to the [Zero-Adjust] item.
2
Select [Exec Zero-Adjust].
The zero-adjust procedure is carried out.

2.6 Adjusting the Zero Position (Zero-Adjust)

2.6 Adjusting the Zero Position (Zero-Adjust)
This procedure compensates for module differences and sets the reference potential of the instru­ment to 0 V. The compensation procedure is performed for all channels and ranges.
2
Chapter 2 Measurement Preparations
• Zero-adjust has no effect on the 8969 and U8969 Strain Unit. (Perform zero-adjust using Auto Balance.)
See:"7.9.4 Setting Model 8969 and U8969 Strain Unit" (p.165)
• MR8990 Digital Voltmeter Unit performs calibration when zero adjustment is performed.
See:"2.7 Performing Calibration (When Mounting MR8990)" (p.60)
Perform zero-adjust in the following cases.
• When an module was changed.
• When power was turned off and on again.
• When settings were initialized (system reset).
• When DC/RMS is switched at the 8971Current Unit (model MR8740 only),
8972 DC/RMS Unit, or U8974 High Voltage Unit
• When measurement mode has been switched on Model U8979 Charge Unit.
• When the ambient temperature has changed significantly.
Zero-position drift
* Drift: This refers to spurious output caused by a shift in the operating point of an opera-
tional amprifier. Drift can occur due to changes in temperature and due to compo­nent aging over a period of use.
*
may occur.
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60
• Before performing this procedure, allow the equipment to warm up for about 30 minutes after the power is turned on to enable the internal temperature of the modules to stabilize.
• Note that calibration cannot be performed during measurement. However, if the calibration setting is set to ON, calibration is performed at the start of measurement.
• Mouse operations are not accepted during calibration. (The procedure may take several seconds.)
Before starting calibration
Procedure
To open the screen: Right-click and select [CHAN] → [Unit List] sheet
1
Move the flashing cursor to the [Zero-Adjust].
2
Select [Execute Zero-Adjust].
Calibration is executed.

2.7 Performing Calibration (When Mounting MR8990)

2.7 Performing Calibration (When Mounting MR8990)
This procedure compensates for MR8990 Digital Voltmeter Unit differences. The compensation procedure is performed for all channels and ranges.
In the following cases, calibration should be executed again.
• When a module was changed.
• When power was turned off and on again.
• When settings were initialized (system reset).
• When the ambient temperature has changed significantly.
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61
2 Make basic settings for measurement
Set waveform length
Select suitable recording method for
measurement target
Set data acquisition speed
Set waveform display format
See:
"3.3.1 Measurement Function" (p.64)
"3.3.2 Time Axis Range and Sampling Rate" (p.66)
"3.3.3 Recording Length (number of divisions)" (p.69)
"3.3.4 Screen Layout" (p.71)
Application examples
See:
"6.4 Performing Waveform X-Y Synthesis" (p.127) "7.2 Displaying Waveforms During Recording (Roll Mode)" (p.145) "7.3 Displaying New Waveforms Over Past Waveforms (Overlay)" (p.146) "Chapter 9 Numerical Calculation Functions" (p.211)
3 Input Channel Settings
Make analog channel settings
Make logic channel settings
See:
"3.4.2 Analog Channel" (p.75)
"3.4.3 Logic Channel" (p.78)
Application examples
See:
"7.1 Adding Comments" (p.138) "7.4 Converting Input Values (Scaling Function)" (p.148) "7.5 Variable Function (Setting the Waveform Display Freely)" (p.155) "7.6 Fine Adjustment of Input Values (Vernier Function)" (p.158) "7.7 Inverting the Waveform (Invert Function)" (p.159)
1 Pre-Measurement Inspection
See:
"3.2 Pre-Measurement Inspection" (p.63)

3.1 Measurement Workflow

7
Measurement
Procedure Chapter 3
3.1 Measurement Workflow
3
Chapter 3 Measurement Procedure
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62
5 Starting Measurement
See:
"3.5 Starting and Stopping Measurement" (p.80) "Chapter 4 Saving/Loading Data & Managing Files" (p.83) "6.1 Reading Measurement Values (Using the A/B Cursors)" (p.120) "6.3.2 Scrolling the Measurement Waveform" (p.125) "6.5 Magnifying and Compressing Waveforms" (p.129)
6 Stopping Measurement
See:
"3.5 Starting and Stopping Measurement" (p.80)
4 Make trigger settings
See:
"Chapter 8 Trigger Settings" (
p.189)
3.1 Measurement Workflow
To reuse previously stored settings
Load the settings file from the File screen. Saving the settings for different measurement targets or applications enhances operation convenience.
See: "4.3 Loading Data" (p.99)
To return settings to the original (basic default) condition
From the System screen, select the [Init] sheet to return the unit to the factory default settings. In this condition, the unit is set up to easily perform simple measurements. If operation of the unit seems unusual or overly complex, per­form the initialization procedure.
See: "18.2 Initializing the Instrument" (p.376)
Page 74
3.2 Pre-Measurement Inspection
Before using the instrument 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.
Do not use if damage is present, as you could receive an electric shock. Replace the damaged items.
Metal Exposed
Is the insulation of the probe or connection cable to be used damaged, or is bare metal exposed?
When using probes and connection cables
When using a clamp
Is the clamp cracked or damaged?
Yes
1
No Metal Exposed
2
Go to
No
2
Go to
Peripheral Device Inspection
If damage is evident, request re­pairs.
Yes
Is damage to the instrument or modules evi­dent?
Instrument and Module Inspection
When turning power on
Do the fans rotate and the Hioki logo appear on the screen?
No
2
The power cord may be damaged, or the instrument may be dam­aged internally. Request repairs.
Does the Waveform screen appear?
No
Yes
The instrument may be damaged internally. Request repairs.
Nothing appears, or the display is abnormal
Yes
Inspection complete
The following steps should be performed before measurement.
63

3.2 Pre-Measurement Inspection

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Chapter 3 Measurement Procedure
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64
Settings window
(p.64)
Timebase setting (Sampling rate) (p.66)
Recording Length (Number of divisions) (p.69)
Opening the Settings window
Click [DISP] in the right-click menu.
Procedure
To open the screen: Right-click and select [DISP] → Waveform screen
Move the flashing cursor to the function item (topmost field in the settings window).
Select
MEMORY (default setting)/RECORDER/FFT

3.3 Setting Measurement Configuration

3.3 Setting Measurement Configuration
Set measurement conditions as follows. By calling up the Waveform screen and then using the Settings window to make basic settings, you can immediately verify the effect of settings on the waveform. Basic settings can also be made by calling up the Status screen and selecting the [Status] sheet.

3.3.1 Measurement Function

Select the function according to the measurement and recording target.
This function is most suitable for oscilloscope-type measurements, such as instantaneous waveforms and transient phenomena.
Trigger functions and calculation functions can be used.
This function is suitable for use instead of pen recorders and pen oscil­loscopes, to record long-term fluctuations and create records for observing slow phenomena.
Real-time printing of data is possible.
Analyze the frequency. Various types of spectrum and octave analysis can be performed.
See: "Chapter 12 FFT Function" (p.247)
Page 76
Description Recorder Function Values
1 2 3 4........... ....100
1 div
Data of One Sample
Maximum value
Minimum value
Data acquired within the specified sampling period
1 2 3 4........... ....100
1 div
Data of One Sample
Maximum value
Minimum value
When the sampling period is short (fast)
With the Recorder function, each data sample consists of the maximum and min­imum values acquired in the specified sampling period. So each data sample has its own amplitude breadth.
When input waveform variation is slight, the difference between maximum and minimum values (breadth, or width) can be inordinately large if the sampling period is short and if severe fluctuations are present due to noise. This phenomena may be prevented by setting a longer sampling period.
65
3.3 Setting Measurement Configuration
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Chapter 3 Measurement Procedure
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66
Procedure
To open the screen: Right-click and select [DISP] → Waveform screen
Memory Function case
1
Move the flashing cursor to the [Timebase] item, and then left-click.
2
Set the time per division (timebase) on the hori­zontal axis.
Select
To control sampling by an external signal, select [External]. (MR8741 only) When external sampling is selected, the number of samples per division can be set in the range from 10
- 10000 S/div.
See: "16.2.3 External Sampling (SMPL)" (p.340)
5 (default setting), 10, 20, 50, 100, 200, 500 μs/div 1, 2, 5, 10, 20, 50, 100, 200, 500 ms/div 1, 2, 5, 10, 30, 50 s/div, 1 min/div, 100 s/div 2, 5 min/div
Recorder Function case
1
Move the flashing cursor to the [Timebase] item.
2
Set the time per division (timebase) on the hori­zontal axis.
Select
3
Move the flashing cursor to the [Sampling] item.
4
Set the sampling rate.
Select
The range of choices depends on the selected timebase. The higher the sampling rate, the more detailed changes can be observed.
10 (default setting), 20, 50, 100, 200, 500 ms/div 1, 2, 5, 10, 30, 50 s/div, 1 min/div, 100 s/div 2, 5, 10, 30 min/div, 1 h/div
1 (default setting), 10, 100 μs 1, 10, 100 ms (Select a sampling rate less than 1/100 of the time axis)
3.3 Setting Measurement Configuration
3.3.2 Time Axis Range and Sampling
Rate
The timebase setting establishes the rate of input signal waveform acquisition, specified as time­per-division on the horizontal axis (time/div). The sampling setting specifies the interval from one sample to the next.
(The setting is shown in brackets under the time axis range for the Memory function (see illustration at right). The indication changes with the time axis range.)
Page 78
Description
Timebase Sampling Rate (Speed) Maximum display frequency
5 μs/div 10 μs/div 20 μs/div 50 μs/div
100 μs/div 200 μs/div 500 μs/div
1 ms/div 2 ms/div
5 ms/div 10 ms/div 20 ms/div 50 ms/div
100 ms/div 200 ms/div 500 ms/div
1 s/div 2 s/div
5 s/div 10 s/div 30 s/div 50 s/div
1 min/div 100 s/div 2 min/div 5 min/div
50 ns (20 MS/s)
100 ns (10 MS/s)
200 ns (5 MS/s) 500 ns (2 MS/s)
1 μs (1 MS/s) 2 μs (500 kS/s) 5 μs (200 kS/s)
10 μs (100 kS/s)
20 μs (50 kS/s) 50 μs (20 kS/s)
100 μs (10 kS/s)
200 μs (5 kS/s) 500 μs (2 kS/s)
1 ms (1 kS/s)
2 ms (500 S/s) 5 ms (200 S/s)
10 ms (100 S/s)
20 ms (50 S/s) 50 ms (20 S/s)
100 ms (10 S/s)
300 ms (3.33 S/s)
500 ms (2 S/s)
600 ms (1.67 S/s)
1 s (1 S/s)
1.2 s (0.83 S/s) 3 s (0.33 S/s)
800 kHz 400 kHz 200 kHz
80 kHz 40 kHz 20 kHz
8 kHz 4 kHz
2 kHz 800 Hz 400 Hz 200 Hz
80 Hz 40 Hz 20 Hz
8 Hz 4 Hz 2 Hz
0.8 Hz
0.4 Hz
0.13 Hz
0.08 Hz
0.04 Hz
0.067 Hz
0.033 Hz
0.013 Hz
One Signal Period
1
2
3
23
24
25
Sampling Rate
Measured Waveform Aliasing occurs when the sampling period is longer than half of the input signal period.
Actual Input Signal
Sampling Points
67
3.3 Setting Measurement Configuration
Selecting the time axis range
Refer to the table below when setting the time axis range. For example, to measure a 100 kHz waveform, the maximum display frequency set­ting range according to the table is 200 kHz - 800 kHz. If the maximum display fre­quency is set to 400 kHz, setting the time axis range to 10 μs/div is recommended.
3
Chapter 3 Measurement Procedure
What is the maximum display frequency?
Displaying waveforms by their sampled values with adequate resolution of characteristics such as sine wave peaks requires a minimum of about 25 samples per waveform period. Maximum display frequency is determined by the timebase.
What is aliasing (recording of non-existent waveforms)?
If the signal to be measured changes too fast relative to the sampling rate, beginning at a certain frequency, non-existent slow signal fluctuations are recorded. This phenomena is aliasing.
With the Memory function, the sampling rate can be significantly affected by the timebase setting, so care is necessary to avoid aliasing when selecting the timebase. Because the timebase determines the maximum display frequency, the fastest possible timebase setting should be used.
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68
Data refresh rate for various units
Module Max. timebase
Max. sampling rate or
data refresh rate
Reference information
8966 5 μs/div 50 ns (20 MS/s) -
8967
Dependent on data re­fresh setting
Dependent on data re­fresh setting
See: "7.9.3"(p.163)
8968 100 μs/div 1 μs (1 MS/s) -
8969,
U8969,
U8979
500 μs/div 5 μs (200 ks/s) -
8970 Dependent on setting Dependent on setting See: "7.9.5"(p.166) 8971 100 μs/div 1 μs (1 MS/s) See: "7.9.6"(p.169)
8972
Dependent on re­sponse setting
Dependent on re­sponse setting
See: "7.9.7"(p.170)
8973 5 μs/div 50 ns (20 MS/s) -
MR8990
Dependent on NPLC setting
Dependent on NPLC setting
-
U8974
Dependent on NPLC setting
Depends on response setting
See: "7.9.9"(p.173)
3.3 Setting Measurement Configuration
The sampling rate is automatically set to 1/100 of the selected time axis range.
If MR8990 Digital Voltmeter Unit is installed, the sampling rate for the chan­nels of that unit is set to 1/50.
Example: When 8966 is installed on unit 1 (channels 1 and 2) and MR8990 on
unit 2 (channels 3 and 4), and the time axis is set to 1 s/div Sampling rate of unit 1 (8966): 10 ms Sampling rate of unit 2 (MR8990): 20 ms
_______________________________________________________________
• The timebase and sampling rate can be set independently. The sampling rate is selected depending on the timebase setting.
• When the following timebase values are selected, displayed waveforms are compressed in the horizontal (time axis) direction as shown. 20 ms/div → x1/2 10 ms/div → x1/5
To minimize noise during measurement
If the sampling rate is set too fast, when the input waveform ampli­tude is small, the difference between maximum and minimum values may become quite large as a result of sudden impulses such as noise. To prevent such phenomena, select a slower sampling rate or enable the module's lowpass filter (p.75).
_______________________________________________________________
Common
The data refresh rate is not allowed to exceed the maximum sampling rate of the module. During the period when data are not updated, the same data are measured, resulting in a stair-shaped waveform. Even when the same signal is input simul­taneously by two units, the data may differ due to differences in sampling rate, frequency bandwidth, and frequency response.
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3.3 Setting Measurement Configuration
Procedure
To open the screen: Right-click and select [DISP] → Waveform screen
Memory Function case
1
Move the flashing cursor to the [Shot] item, and then left-click.
2
Select the type.
Select
3
Set the recording length.
Select
(Fixed Shot)
(User Shot)
Can be inputted by the numeric keypad on the STATUS
screen.
See: "7.1.3 Alphanumeric Input" (p.141)
Fixd Shot Select from a a range of preset values.
User Shot
Freely specify any value in 1-division units.
25, 50, 100, 200, 500, 1000, 2000, 5000, 10000, 20000, 50000, 100000 div
1 to 160000 div
Recorder Function case
1
Move the flashing cursor to the [Shot] item.
2
Select the type.
Select
3
Set the recording length.
Select
(Fixed Shot)
(User Shot)
Can be inputted by the numeric keypad.
See: "7.1.3 Alphanumeric Input" (p.141)
Fixd Shot Select from a a range of preset values.
User Shot
Freely specify any value in 1-division units.
Cont. When [On] is selected, measurement is carried out while
continuously overwriting data in memory. Data from the point at which measurement was stopped to the maximum recording length can be saved or print­ed again.
25, 50, 100, 200, 500, 1000, 2000, 5000, 10000, 20000, 50000 div
1 to 80,000 div

3.3.3 Recording Length (number of divisions)

Set the length (number of divisions) to record each time data is acquired.
69
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Chapter 3 Measurement Procedure
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3.3 Setting Measurement Configuration
Description
Recording Length and Data Samples
Each division of the recording length consists of 100 data samples. The total number of data samples for a specified recording length = set recording length (divisions) × 100 + 1. However, if MR8990 Digital Voltmeter Unit is installed, the number of data sam­ples is as follows.
• When only MR8990 is installed Number of data samples for each division: 50 data samples Total number of data samples for recording length: Set recording length (divi­sions) × 50 + 1
• When a mix of MR8990 and another units is installed Channel of MR8990 Number of data samples for each division: 50 data samples Total number of data samples for recording length: Set recording length (divi sions) × 50 + 1 Channel of other units Number of data samples for each division: 100 data samples Total number of data samples for recording length: Set recording length (divi­sions) × 100 + 2
• Each recording length division = 100 pairs of data points, with each pair com­posed of two values: the maximum and minimum measured values within each sampling period. The resolution of the data measured by the recorder function is 16bit.
When recording length is set to [Cont.]
• Data for up to 80,000 divisions from the end of measurement can be recorded in the internal memory of the unit. The instrument stores the maximum recording length of data back from the point at which measurement was stopped in its internal memory (80,000 divi­sions).
• When Auto-saving is On, the saving is not performed during the measure­ment. At the forced shutdown point, the remaining data in memory will be saved.
To change recording length while measuring
Recording length can be changed on the Waveform screen. The measurement will restart with the newly set recording length.
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3.3 Setting Measurement Configuration
Procedure
To open the screen: Right-click and select [STATUS] → [Status] sheet
Memory Function case
Move the flashing cursor to the [Format] item.
Select
Single Display and record using 1 graph. (default setting)
Dual
Display and record using 2 graphs.
Quad
Display and record using 4 graphs.
Oct
Display and record using 8 graphs.
Hex Display and record using 16 graphs.
XYSingle
Set input signal to X-Y and display and record the correlation using 1 graph.
XYQuad
Set input signal to X-Y and display and record the correlation using 4 graphs.
Procedure
To open the screen: Right-click and select [CHAN] →[Unit List] sheet
1
Move the flashing cursor to the [Graph] item.
2
Select the display screen for each channel.
The sequence is Gr1, Gr2, Gr3... from the top.
Gr1
Gr2
Gr3
Gr4
<Sample screen after setting>

3.3.4 Screen Layout

You can specify the format in which the input signal is shown on the Waveform screen.
Selecting X-Y1 screen or X-Y4 screen allows waveform X-Y synthesis. (This applies to the Memory function.)
See: "6.4 Performing Waveform X-Y Synthesis" (p.127)
71
3
Chapter 3 Measurement Procedure
Analog Channel Assignment
With 2, 4, 8, or 16 screens, analog channels can be freely assigned to the respective graphs.
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72
See: "Displaying All Channels for Making the Variable Function Setting" (p.157)
Opening the Channel settings window
You can switch setting screens by clicking a tab.
Click [DISP] → [CH.SET] in the right-click menu.

3.4 Input Channel Setting

3.4 Input Channel Setting
Set the analog channel and logic channel.
To hide waveform interpolation
Set the waveform display color in the channel setting window to Off.
See: "1. Waveform Display Color" (p.75)
To copy the settings of one channel to another
See: "7.8 Copying settings to other channels (calculation No.) (Copy func-
tion)" (p.160)
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73
2 Make input and screen display related settings
Make filter settings (if noise occurs)
Select input coupling
Match range to measurement target input value
(as necessary)
See:
"3. Coupling" (p.75)
"2. Vertical axis (Voltage axis) Range" (p.75)
"7.4 Converting Input Values (Scaling Func­tion)" (p.148)
"7. Low-pass filtering" (p.77)
3 Make trigger settings (as necessary)
4 Make display color and display position settings
See:
"Chapter 8 Trigger Settings" (p.189)
1 Select the channels to use (Memory function) only)
Convert input value (as necessary)
Fine-tune waveform amplitude (as necessary)
Set zoom on vertical axis (voltage axis) direction
(as necessary)
"5. Vernier" (p.76)
"4. Vertical axis (Voltage axis) Zoom" (p.76)
Set waveform display color
Set display position and scaling (as necessary)
See:
"1. Waveform Display Color" (p.75)
"7.5 Variable Function (Setting the Waveform Display Freely)" (p.155)
4 Make graph display settings
For 1, 2, 4, 8, 16 screens
For X-Y1, X-Y4 screens
See:
"Analog Channel Assignment" (p.71)
Procedures "4" and “5” of "6.4 Performing Waveform X-Y Synthesis" (p.128)
3.4 Input Channel Setting

3.4.1 Channel Setting Workflow

Explains the workflow to make settings for the analog channels (MR8740: Ch1 - Ch32, MR8741:Ch1 ­Ch16).
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Chapter 3 Measurement Procedure
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74
1 Make screen display related settings
Setting logic recording width
See:
"1. Logic Width" (p.78)
2 Make display color and display position settings
Set waveform display position
Set waveform display color
See:
"2. Waveform Display Position" (p.78)
"3. Waveform Display Color" (p.78)
3.4 Input Channel Setting
• When input coupling is set to GND, the waveform will have no amplitude and
range setting is not possible.
• Due to the influence of filter attenuation, correct range setting may sometimes
not be possible.
• When making trigger settings, set the vertical axis (voltage axis) range first. If
the range is changed after specifying the trigger, the trigger setting may change.
• When using the Variable function, set the vertical axis (voltage axis) range first.
If the range is changed after specifying the Variable setting, observation with sufficient precision may not be possible.
• When using the Variable and Scaling functions together, make the Scaling set-
tings first. If Scaling settings are made after selecting the Variable function, the intended display result may not be achieved.
The setting workflow for logic channels (standard LOGIC terminals LA - LB (MR8740), LA -LD (MR8741), expansion LOGIC terminals L1A - L8D) is explained below.
• Waveform display position can be specified in 1% increments.
• Not displayed for X-Y1 and X-Y4 screens.
• With MR8740, install the logic units on unit 1 to unit 8. Any logic units installed
on units 9 and after will be invalid.
Page 86
Select
Select

3.4.2 Analog Channel

Procedure
To open the screen: Right-click and select [DISP] →Waveform screen →Right-click and select [CH.SET]
→Channel settings window ([Analog] sheet)
1. 2. 3. 4. 5. 6. 7.
1
Move the flashing cursor to the channel for which to make settings.
2
Select the settings by clicking the mouse.
V
Set the analog channel. For information about specific settings for each module, see "7.9"(p.161).
75
3.4 Input Channel Setting
3
Chapter 3 Measurement Procedure
1. Waveform Display Color
2. Vertical axis
(Voltage axis) Range
To copy the settings of one channel to another
See: "7.8 Copying settings to other channels (calculation No.) (Copy function)" (p.160)
Specifies the color in which the waveform of the selected channel is displayed. You can also select the same color as another channel.
Off The waveform is not displayed. If the Auto Save setting for [Save Channel] is
[Disp Ch], data for the channel will also not be saved.
See: "Select the channel to save." (p.90)
On
All On-Off
Sets the vertical axis (voltage axis) range for each channel. The value set here is the voltage of one increment on the vertical axis. For information on the full-scale value for the respective modules, see the table in the section "6. Zero Position" (p.76). When the Variable function is on but Variable Auto Adjustment is off, the size of the waveform on the screen will not change even if the vertical axis (voltage) range is changed.
The waveform is displayed. Set the display color by clicking [ ↑ ] or [ ↓ ].
Switches the waveform display of all channels to all ON or all OFF
An over-range condition has occurred
Change the vertical axis (voltage axis) range to a lower sensitivity set­ting.
3. Coupling Set the input signal coupling method. Normally, DC coupling should be selected.
DC (V,– ) Both DC components and AC components of the input signal will be measured.
AC ( , ~)
GND ( )
(default setting)
Only AC components of the input signal will be measured. DC components are blocked.
Input is shorted to ground. (Allows checking the zero position.)
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76
A/D Data
2047
0
-2047
A/D Data
0 V
2000 LSB
0 %
50 %
100 %
Display screen (Zero position: 0%)
Display screen (Zero position: 50%)
Display screen (Zero position:100%)
<Zoom factor ×1>
3.4 Input Channel Setting
4. Vertical axis (Voltage axis) Zoom
Vertical axis (voltage axis) zoom-up or zoom-down settings can be made sepa­rately for each channel. The settings will be used for display.
Zooming is carried out using the zero position as reference. The measurement resolution does not change.
See: "6.5.3 Magnifying and Compressing Vertical Axis (Voltage Axis)" (p.131)
To achieve a user-specified zoom setting, the Variable function is used. By reversing plus/minus, the waveform can be inverted.
See: "7.5 Variable Function (Setting the Waveform Display Freely)" (p.155)
"7.7 Inverting the Waveform (Invert Function)" (p.159)
5. Vernier Fine adjustment of input voltage can be performed arbitrarily on the Waveform
screen (display only). When recording physical values such as noise, temperature and acceleration using sensors, amplitude can be adjusted to facilitate calibration.
See: "7.6 Fine Adjustment of Input Values (Vernier Function)" (p.158)
6. Zero Position Sets the 0 V level display position. If the 0 V input level has shifted, perform
zero-adjust.
See: "2.6 Adjusting the Zero Position (Zero-Adjust)" (p.59) See: "2.7 Performing Calibration (When Mounting MR8990)" (p.60)
If the zero position of the 8969 and U8969 Strain Unit is out of alignment, perform auto balance.
See: "7.9.4 Setting Model 8969 and U8969 Strain Unit" (p.165)
• Simply moving the display position will not apply an offset to the input.
• Zoom of the vertical axis direction (voltage axis) is based on the zero position.
• The voltage range displayed in the waveform screen changes with zero posi­tion and zoom of the vertical axis (voltage axis) but the measurable range does not change.
The zero position is as shown in the illustration below. (Example: 8966 Analog Unit)
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3.4 Input Channel Setting
Full-scale resolution for input units at various vertical axis zoom factors (LSB)
Module Zoom factor
×1/10 ×1/5 ×1/2 ×1 ×2 ×5 ×10 ×20 ×50 ×100
8966 (Analog) 8971 (Current) 8972 (DC/RMS)
8967 (Temperature)
8968 (High resolution) U8974 (High voltage)
8969, U8969 (Strain) U8979 (Charge)
8970 (Power frequency)
8970 (Count) 400000 200000 80000 40000 20000 8000 4000 2000 800 400
8970 (Excluding power frequency and count)
MR8990 (DVM)
Brackets indicate valid data range *: With the 8967 TEMP Unit, the valid range differs depending on the thermocouple. For information on the minimum resolution,
see the specifications of the 8967 TEMP Unit.
20000 (4000)
200000 100000 40000 20000 10000 4000 2000 1000 400 200
*
320000 (64000)
250000 (64000)
20000 10000 4000 2000 1000 400 200 100 40 20
100000 50000 20000 10000 5000 2000 1000 500 200 100
1200000 1200000
10000 (4000)
160000 (64000)
125000 (64000)
4000 2000 1000 400 200 100 40 20
64000 32000 16000 6400 3200 1600 640 320
50000 25000 12500 5000 2500 1250 500 250
1200000 1000000
500000 200000 100000 50000 20000 10000
3
Chapter 3 Measurement Procedure
Full-scale value = Vertical-axis (voltage-axis) range × 20 divisions Example: When the vertical-axis (voltage-axis) range is set to 1 V/div 1 V/div × 20 = 20 V The 1 V/div range has a full-scale value of 20 V.
7. Low-pass filtering
Make settings for the low-pass filter of the module. This is useful for eliminating unwanted high-frequency components. The filter type depends on the module. Make the setting according to the input characteristics.
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78
Select
Select
1.
Procedure
To open the screen: Right-click and select [DISP] →Waveform screen →Right-click and select [CH.SET]
→Channel settings window ([Logic] sheet)
2. 3.
1
Move the flashing cursor to the channel for which to make settings.
2
Select the settings by clicking the mouse.
3.4 Input Channel Setting

3.4.3 Logic Channel

Make settings for the logic channels. The channel settings window (Logic sheet) is shown when the display format is 1, 2, 4, 8 or 16 screens.
To copy the settings of one channel to another
See: "7.8 Copying settings to other channels (calculation No.) (Copy function)" (p.160)
1. Logic Width Allows changing the display width of the logic waveform.
Making waveforms more narrow can enhance the readability of the display when there are a high number of waveforms.
Wide Make the waveform wider.
Normal Display the waveform at normal width.
Make the waveform more narrow. (default setting)
2. Waveform Display
Narrow
Determines where on the screen the logic waveform is displayed. The position can be freely moved within the range of the display.
Position
3. Waveform Display Color
Specifies the color in which the waveform of the selected channel is displayed. You can also select the same color as another channel. For logic modules, the color can be specified for each module and each channel separately.
Off The waveform is not displayed. If the [Save Channel] setting is [Disp Ch], data
for the channel will not be automatically saved.
See: "4.2.2 Automatically Saving Waveforms" (p.88)
On
Probe On-Off
All On-Off Switches the display of all logic waveforms to all ON or all OFF.
The waveform is displayed. Set the display color by clicking [ ↑ ] or [ ↓ ].
Switches the waveform display of the same probes to all ON or all OFF.
This can be selected when the cursor at in the waveform display position item.
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79
Sheet switching (1 to 4)
3.4 Input Channel Setting
• When the standard logic display is on, the 8970 Freq Unit installed on unit 1 or 2 can no longer be used. Furthermore, the 16-bit resolution 8967 TEMP Unit, 8968 High Resolu­tion Unit, 8969 Strain Unit, U8969 Strain Unit, U8974 High Voltage Unit, and U8979 Charge Unit have a resolution of 12 bits. Also, when MR8990 Digital Voltmeter Unit is installed on unit 1 (unit 1 or unit 2 in the case of MR8741), the standard logic can no lon­ger be used.
• With MR8740, install the logic units on unit 1 to unit 8. Even if you install logic units on units 9 and after, they will be invalid.

3.4.4 Display Sheet

The input channel settings can be set differently for each displayed sheet. Up to four sheets can be set. You can set desired waveforms for displaying to different sheets and switch them.
3
Chapter 3 Measurement Procedure
• Only the following display-related settings can be set to each displayed sheet.
Analog waveform: Display ON/OFF, waveform color, ratio, zero position,
graph variable (ON/OFF, upper and lower limit)
Logic waveform: Display ON/OFF, waveform color, display position, and
logic width
X-Y waveform: Display ON/OFF, waveform color, X ch, Y ch, waveform
calculation (X ch, Y ch)
Common setting: Display format
• The measurement-related settings other than above will be common to all dis-
played sheets. When range is changed, the range of all display sheets is changed.
• When a settings file is saved, the settings of all displayed sheets are saved.
• A waveform file is saved based on the setting of the sheet displayed at the
time of saving. When a waveform file is loaded, only the sheet displayed at the time of saving can be loaded because other sheets were not saved.
You can configure the waveform calculation settings using the channel setting window.
See: "3.4 Input Channel Setting" (p.72)
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80
Procedure
To open the screen: Right-click and select [DISP] →Waveform screen
The measurement will stop at the point where the mouse is clicked.
The stopping procedure is canceled and measurement continues.

3.5 Starting and Stopping Measurement

3.5 Starting and Stopping Measurement
This section explains how to initiate and terminate a measurement.
Starting Measurement
Click [START] to start measuring.
• When a measurement is started, waveform data that were displayed on the screen are cleared. However, when the measurement conditions are the same, the waveform data for up to 16 past measurements is retained as history.
• Measurement can also be started by inputting a signal at the external control terminal.
See:"Chapter 16 External Control (MR8741 Only)" (p.335)
Stopping Measurement
Click [STOP] to stop recording at the end of the specified recording length. Click [STOP] again so stop recording immediately.
The operation conditions for [START] and [STOP] can be changed.
See: "Chapter 14 System Environment Settings" (p.309)
Note When [STOP] is clicked, the following indication may appear on the screen.
To prevent inadvertent measurement start
To reduce the risk of accidentally starting a measurement through an operation error, operation conditions can be set for [START].
See: "Start Action" (p.311)
To automatically save data during measurement
See: "4.2.2 Automatically Saving Waveforms" (p.88)
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81
Start Measurement
[START]
End of Measurement
Recording Starts
Recording
Stops
[Now Storing]
[Storing Finished]
[ ]: Status Bar Display
Recording
Normal Measurement
Without triggering
Terminates when recording length has been recorded.
End of Measurement
[Trigger Wait]
Recording Starts
T
Recording
Stops
[Now Storing]
Recording starts when a trigger event occurs and continues for the specified recording length.
Start Measurement
[START]
[Storing Finished]
Recording
Trigger Measurement
Trigger mode: [Single] Pre-triggering not enabled
Single triggering
Recording starts when a trigger event occurs, continues for the specified recording length, and returns to the Trigger Wait state.
Stop Measurement
[STOP]
[Trigger Wait]
Recording Starts
T
Recording
Stops
[Now Storing]
Start Measurement
[START]
Recording
[Trigger Wait]
T
Recording Starts
Repeated triggering
Trigger mode: [Repeat] Pre-triggering not enabled
[Pre-Trigger Wait]
End of Measurement
[Trigger Wait]
Start Measurement
[START]
T
Recording
Stops
[Now Storing]
After starting measurement and internally acquiring data for the specified pre-trigger period, the Trigger Wait state is activated.
Recording Starts
The specified pre-trigger wait period is recorded before each trigger event
The data before a trigger event (for the pre-trigger period) is recorded.
Recording
[Storing Finished]
T
Post-trigger waveform
Waveform during specified pre­trigger period.
Repeated triggering and recording of phenomena before each event
Trigger mode: [Repeat] Pre-triggering enabled
Operation is repeated from pre-trig­gering stage.
3.5 Starting and Stopping Measurement
Measurement and Internal Operations
Measurement methods are normal measurement (start recording when measurement starts) and trigger measurement (start recording when trigger criteria are satisfied). In this manual, "Measurement start" means the instant when you click on the waveform screen.
[START], and "Recording start" means the instant when recording begins
• Select the Trigger mode to record upon either single or repeating trigger
events.(p.191)
• Enable pre-triggering if you want to capture data measured prior to trigger
events.(p.204)
3
Chapter 3 Measurement Procedure
When the trigger mode is set to [Repeat] or [Auto] (Memory function only), the number of trigger events is shown in the top part of the screen (Storage Counter).
See: "Explanation of Screen Contents" (p.20)
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3.5 Starting and Stopping Measurement
Page 94
Saving/Loading Data
Opening the [File Save] sheet
You can switch setting screens by clicking a tab.
Click [SYSTEM] in the right-click menu.
Saving Data (p.87)
Save Method
• Auto save
• Manual save by clicking [SAVE] (Selection save, Quick save)
Operations available from the [File Save] sheet
Save Types
(Auto Save)
• Waveform data
(Manual save by clicking [SAVE])
• Settings data
• Waveform data
• Display screens
• Waveform screen
• Numerical calculation results
(p.221)
• Waveform evaluation area
& Managing Files Chapter 4
Data can be saved and loaded and files can be managed.
Before saving data, configure the save settings on the [File Save] sheet. Load data and manage files from the File screen.
83
4
Chapter 4 Saving/Loading Data & Managing Files
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84
Media information
Shows information about the selected media. File Count : Shows the number of saved files in the selected folder level. Folder Count: Shows the number of folders in the selected folder level. Count : Shows the number of files and folders that can be created in
the selected folder level.
The selected file is indicated by a flashing cursor.
Opening the File screen
1
Verify that a storage media is inserted.
See: "2.3 Recording Media Preparation" (p.54)
2
Select [Change Media] and select a storage media. The files on the selected storage media are shown in the file list.
The information about the selected file is displayed.
To change the media
Read-only files and folders are shown in blue. Deleting or re­naming such files is not possi­ble.
The file order will be displayed.
: Ascending order: Descending order
Click
[FILE] in the right-click
menu.
Loading Data (p.99)
Managing Files (p.87)
• Saving data(p.103)
• Creating new folders (p.105)
• Copying files (p.108)
• Sorting files (p.107)
• Deleting files (p.106)
• Renaming files (p.107)
Operations available from the File screen
Formatting Storage Media (p.55)
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85

4.1 Data capable of Being Saved & Loaded

4.1 Data capable of Being Saved & Loaded
The following kinds of data can be saved by and loaded into the instrument.
Data the Instrument Can Save & Load O: Possible/ -: Not Possible
Save
Man-
Auto
-O O -
OO O -
OO O -
Load
ual
PC
Readable
*4
*4
File Type
Settings Data
Waveform Data
Whole of the waveform ac­quired by the instrument or a section of the waveform spec­ified with the A and B cursors.
*1
*2
File
Format
Binary SET
Binary
Te xt
Indica-
tion
MEM
REC
FFT FFT Function data O O O -
CSV Text Data O O - O
File Extension & Description
Settings data (Measurement Configuration)
Memory Function waveform data
Recorder Function waveform data
4
Chapter 4 Saving/Loading Data & Managing Files
Waveform Management Data
(Divided Saving)
*3
(Index file)
IDX Index data for divided saving O O O -
Index data for memory divi-
SEQ
sion (automatically created during batch saving)
OO O
-
Captured Screen Image (Display/Waveform
BMP
*5
BMP Image Data - O - O
screens) Numerical Calculation Results
Waveform evaluation settings Data
Waveform evaluation area
Arbitrary waveform data
Arbitrary waveform data
Generation program data
*1: Multiple data can be saved in the instrument, and loaded selectively. Automatic loading at power-on is also possible. *2: When the data is to be reloaded on the instrument, save it in binary format. Waveforms and some measurement set-
tings are saved.
When the data is to be loaded on a PC, save it in text format. (p.87) When saving a section of a waveform, use the A and B cursors to set the section. (p.120), (p.124)
*3: When you want to use memory division and load all blocks at the same time:
Save measurement data using [All blocks]. A directory is automatically created and waveform data for each block and index data (SEQ) is created. When loading, load this index data.
When loading waveform data of divided saving: Import the IDX index data. *4: Loading is possible with the Wave Viewer (Wv). *5: This is a standard Windows
: File type cannot be handled by MR8740/MR8741.
Te xt CSV Text Data O O - O
Binary ARE
BMP BMP
Binary WFG
Te xt
Binary PLS
Pro­gram
®
graphics format. File in this format can be handled by many graphics programs.
Settings data (MR8741 only) (measurement conditions + waveform evaluation areas)
Waveform evaluation area image data (MR8741 only)
Arbitrary waveform data (For U8793)
Arbitrary waveform data
TFG
(For U8793)
Pulse pattern data (For MR8791)
Generation program data
FGP
(For U8793)
-O O -
-O O O
-O O -
-- O O
-O O -
-O O -
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86
4.1 Data capable of Being Saved & Loaded
Files larger than 2 GB cannot be saved.
Data Not Loadable on the Instrument______________________________
• Data saved on devices other than the MR8740/MR8741 Memory HiCorder, MR8847s Memory HiCorder, and MR8827 Memory HiCorder.
• Image files other than waveform evaluation areas (
•file
)
Page 98
4.2 Saving Data
To save data automatically
during measurement
(p.88)
To save data manually with [SAVE] (p.93)
Auto Save
This is convenient for saving multi­ple times and for quick saving of data during monitoring. Before click­ing [SAVE], the data content is specified. (p.93)
(default setting)
Click [SAVE] and then specify the data content for saving. Because no settings on the [File Save] sheet are necessary, save settings can be made from any screen. (p.93)
Quick Save Selection Save
Measurement data are acquired for the recording length and then saved automatically each time. Save loca­tion and data type are selected be­fore the measurement. (p.88) Data are saved on USB memory stick.
Save data straight away
Select data and save
After installation and connection,
turn the power on.
Insert the storage media.
Set the measurement configura-
tion.
Set [Auto Save] to [On].
Select the save destination.
Select the data to save.
Measure
Auto Save
[File Save] sheet
• Waveform data
• Numerical calculation results*
After installation and connection,
turn the power on.
Insert the storage media.
Set [Select at save] to [No].
Select the save destination.
Select the data to save.
Click [SAVE]
Save
[File Save] sheet
Any of the following can be saved:
• Setting data
• Waveform data
• Display screen
• Waveform screen
• Numerical calculation results
• Waveform evaluation setting data
• Waveform evaluation area
• Pulse pattern data
• Arbitrary waveform data
• Program data
After installation and connection,
turn the power on.
Insert the storage media.
Set [Select at save] to [Yes].
Click [SAVE]
Select the save destination.
Select the data to save.
Select [Exec]
Save
[File Save] sheet
Dialogue
Any of the following can be saved:
• Setting data
• Waveform data
• Display screen
• Waveform screen
• Numerical calculation results
• Waveform evaluation setting data
• Waveform evaluation area area
• Pulse pattern data
• Arbitrary waveform data
• Program data
Check points before saving:
• Media inserted and initialized? (p.54), (p.55)
• Save target specified correctly?
• Auto Save set to [On]? (For auto-saving)
*: To save numerical calculation results
See: "9.4 Saving Numerical Calculation
Results" (p.221)

4.2.1 Save Types and Workflow

There are basically three types of save operations.
87

4.2 Saving Data

4
Chapter 4 Saving/Loading Data & Managing Files
Page 99
88
Procedure
To open the screen: Right-click and select [SYSTEM] → [File Save] sheet
1
Enable auto save.
Move the flashing cursor to the [Auto Save] item, and select [On].
Default setting: Off (automatic saving is not performed)
2
Set the save type.
Move the flashing cursor to the [Save Type] item.
Select
3
Set the save destination.
Move the flashing cursor to the [Save To], and select [Edit].
The Browse folders dialog box appears (at bottom right).
Move the flashing cursor to the save target media* and confirm the setting with [Confirm].
Select
When the root directory (topmost folder on media) was selected, a folder named "HIOKI_MR8740" or "HIOKI_MR8741" is created automatically. (If the media was initialized in the instrument, the folder will already have been created.) This folder is then used as save target.
To create a new folder, select [New Folder]. When [LAN] is set as the save destination, [New Folder] setting is ignored and the folder named with the current date is created.
4
Set the file name.
Move the flashing cursor to the
[Save Name]
, and enter the save
name.
See: "7.1.3 Alphanumeric Input" (p.141)
When [LAN] is set as the save destination, [Save Name] setting is ignored and the files to be saved are named in the previously­determined format.
See:
"Save Operations (When setting the save destination to [LAN])"(p.92)
Wave Binary
Save the waveform data in binary format. (Data saved in binary format can only be loaded to this instrument.)
Wave Text
Save the waveform data in text format. The data can be thinned out and then saved. (This data can be opened by a computer editor or spreadsheet software, but it cannot be loaded to this unit.)
USB1 Automatically save the waveform data on the USB memory stick.
LAN
Automatically save the waveform data on the PC connected via LAN. Model 9333 LAN Communicator is required to be installed.
1 2 3
4
4.2 Saving Data

4.2.2 Automatically Saving Waveforms

Measurement data are acquired for the recording length and then saved automatically each time. Save location and data type are selected before the measurement. Waveform data can be saved.
File name
The maximum number of characters for the [Save Name] string is 123. The maximum path length including file name is 255 characters.
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89
5
Select the save area.
Move the flashing cursor to the [Save Area] item.
Select
6
(When [Wave Binary] is the selected save type) Select whether to save divided files
Move the flashing cursor to the [Division] item.
Select
(When [Wave Text] is selected as the save type) Set the data thinning number.
Move the flashing cursor to the [Save Thin] item.
Select
Whole Wave
Save all recorded data. (default setting)
A-B Wave
Save the data between the A and B cursors. If only the A cursor is used, the range from the A cursor position to the end of the data is saved. A/B cursor Specification Method (p.120)
Off Files are not divided when saved.
16M, 32M 64M
Select the size for divided save.
Off Data thinning (sub-sampling) is not carried out.
1/2 to 1/1000
Set the thinning number (out of how many data items to leave one data item remaining).
5
4.2 Saving Data
4
Chapter 4 Saving/Loading Data & Managing Files
About the save area
• If the MR8990 is installed, one data item more than the number of data items
• The data that is measured and saved with the MR8990 will be the same data
About divided saving
• Large quantities of waveform data can be divided and saved as multiple files.
• Saving divided data makes a folder automatically, and creates one or more
• Then by loading the IDX file, the data in the waveform file(s) is loaded as a
• When divided saving is selected, delete save is not available.
• When using the memory division function, divided saving cannot be performed
See: "Batch load of waveform data"(p.101)
Thinning
A large amount of space is required for saving files in text format. Data thinning enables a reduction in file size. Example: When [1/2] is set, every second data item is saved. The number of data items is reduced to a 1/2.
specified with the A and B cursors may be saved.
twice in a row.
waveform files and an index (IDX) file in the folder.
batch.
automatically.
"Memory Division Function"(p.241)
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