Hioki 8841, 8842 Instruction Manual

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INSTRUCTION MANUAL

8841 8842

MEMORY HiCORDER

Page 2

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Contents

Introduction i Inspection i Safety Notes iii Notes on Use v Chapter Summary ix

Chapter 1 Product Overview 1

1.1 Major Features 1

1.2 Identification of Controls and Indicators

Chapter 2 Installation and Preparation 7

2.1 Installation of the Unit 7

2.2 Power Supply and Ground Connections

2.2.1 Connecting the AC Power Supply 9

2.2.2 Connecting the 9433 DC POWER ADAPTER 10

2.2.3 Functional Grounding of the 8841/8842

2.3 Power On/Off 13

2.4 Connection of the Input Unit

2.4.1 8936/ 8938/ 8946 ANALOG UNITs 14

2.4.2 8937 VOLTAGE/TEMP UNIT 15

2.4.3 8939 STRAIN UNIT

2.4.4 8940 F/V UNIT

2.4.5 8947 CHARGE UNIT 19

2.5 Logic Probe Connection 20

2.6 9018-10/9132-10 CLAMP ON PROBE

16 17

2.7 9322 DIFFERENTIAL PROBE Connection

2.8 Loading Recoding Paper

2.9 Care of Recording Paper

2.10 Notes on Measurement

2.10.1 Maximum Input Voltage 28

2.10.2 Using a Voltage Transformer

22 23 25 26

Chapter 3 Basic Key Operation 31

3.1 Basic Key Operation 31

3.1.1 Basic Display Operation (MENU) 31

3.1.2 Printer Key Operation 31

3.1.3 Setting the Items 32

3.1.4 Jog/Shuttle Controls and Select Key 32

3.1.5 Basic Input Operation 33

3.1.6 Measurement Start and Stop Operation 33

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3.2 Other Keys Operation 34

3.3 Screen Configuration

Chapter 4 Memory Recorder Function 37

4.1 Overview of the Memory Recorder Function 37

4.2 Operation Sequence (MEM)

4.3 STATUS Settings (MEM) 41

4.3.1 Setting the Function Mode 42

4.3.2 Setting the Time Axis Range 42

4.3.3 Setting the Recording Length 43

4.3.4 Setting the Display Layout 44

4.3.5 Setting the Interpolation (dot-line) 46

4.3.6 Setting the Print Mode 46

4.3.7 Setting the Roll Mode 47

4.3.8 Setting the Auto Print Function 47

4.3.9 Setting the Auto Save Function 48

4.3.10 Setting the Overlay Function 50

4.3.11 Setting the Averaging Function 51

4.3.12 Setting the Waveform Evaluation 53

4.4 Using the X-Y Waveform Plots (MEM) 54

4.5 Settings on the Waveform Display Screen (MEM)

4.6 Auto Range Function

4.7 Other Screen Settings

4.8 Start and Stop Operation (MEM)

57 58 60 61

Chapter 5 Recorder Function 63

5.1 Overview of the Recorder Function 63

5.2 Operation Sequence (REC)

5.3 STATUS Settings (REC)

5.3.1 Setting the Function Mode 68

5.3.2 Setting the Time Axis Range 68

5.3.3 Setting the Sampling Period 69

5.3.4 Setting the Recording Length 69

5.3.5 Setting the Display Layout

5.3.6 Setting the Print Mode

5.3.7 Setting the Additional Recording Function 74

5.3.8 Setting the Printer Function (Real Time Printing) 75

5.3.9 Setting the Auto Save Function 76

5.3.10 Setting the Interpolation (dot-line, X-Y only) 77

5.3.11 Setting the Display Clear Function (X-Y only) 77

65 67

70 73

5.4 Using the X-Y CONT Recorder 78

5.4.1 Setting the Status Screen 79

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5.4.2 Setting the Channel Screen 79

5.4.3 Setting the Display Screen

5.5 Settings on the Waveform Display Screen (REC) 81

5.6 Start and Stop Operation (REC)

Chapter 6 RMS Recorder Function 83

6.1 Overview of the RMS Recorder Function 83

6.2 Operation Sequence (RMS) 84

6.3 STATUS Settings (RMS)

6.3.1 Setting the Function Mode 87

6.3.2 Setting the Time Axis Range 87

6.3.3 Setting the Frequency

6.3.4 Setting the Recording Length

6.3.5 Setting the Display Layout 89

6.3.6 Setting the Print Mode 91

6.3.7 Setting the Additional Recording Function 92

6.3.8 Setting the Printer Function (Real Time Printing)

6.3.9 Setting the Auto Save Function

6.4 Settings on the Waveform Display Screen (RMS) 95

88 88

93 93

6.5 Start and Stop Operation (RMS)

Chapter 7 Recorder & Memory Function 97

7.1 Overview of the Recorder & Memory Function 97

7.2 Operation Sequence (REC&MEM)

7.3 STATUS Settings (REC&MEM)

7.3.1 Setting the Function Mode 101

7.3.2 Setting the Time Axis Range 102

7.3.3 Setting the Recording Length

7.3.4 Display Function

7.3.5 Setting the Display Layout 105

7.3.6 Setting the Print Mode 106

7.3.7 Setting the Additional Recording Function 107

7.3.8 Setting the Printer Function (Real-time Printing)

7.3.9 Setting the Auto Save Function

7.3.10 Setting the Real-Time Save 111

7.4 Settings on the Waveform Display Screen (REC& MEM)

100

103 104

108 109

117

7.5 Start and Stop Operation (REC&MEM)

118

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Chapter 8 FFT Function 119

8.1 Overview of the FFT Function 119

8.2 Operation Sequence (FFT)

8.3 STATUS1 Settings (FFT)

8.3.1 Setting the Function Mode 123

8.3.2 Setting the FFT Channel Mode 123

8.3.3 Setting the Frequency Range 124

8.3.4 FFT Number of Points Setup 125

8.3.5 Setting the Window Function 125

8.3.6 Setting the Display Format 126

8.3.7 Selecting Reference Data 128

8.3.8 Setting the FFT Analysis Mode 129

8.3.9 Setting the X-axis and Y-axis Displays 130

8.3.10 Setting the Analysis Channel 132

8.3.11 Setting the Display Scale 133

8.3.12 Octave Filter Setting 134

120 122

8.4 STATUS2 Settings (FFT) 135

8.4.1 Setting the Averaging Function 136

8.4.2 Setting the Interpolation (dot-line) 139

8.4.3 Setting the Print Mode 140

8.4.4 Setting the Auto Print Function 140

8.4.5 Setting the Auto Save Function

8.4.6 Setting the Waveform Evaluation

141 142

8.5 Settings on the Waveform Display Screen (FFT) 143

8.6 Start and Stop Operation (FFT)

8.7 FFT Analysis Function

8.7.1 Storage Waveform [STR] 145

8.7.2 Linear Spectrum [LIN] 146

8.7.3 RMS Spectrum [RMS] 148

8.7.4 Power Spectrum [PSP] 150

8.7.5 Auto Correlation [ACR] 152

8.7.6 Histogram [HIS]

8.7.7 Transfer Function [TRF]

8.7.8 Cross Power Spectrum [CSP] 156

8.7.9 Cross Correlation [CCR] 158

8.7.10 Unit Impulse Response [IMP] 159

8.7.11 Coherence [COH] 160

8.7.12 Octave Analysis [OCT] 161

144 145

153 154

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Chapter 9 Input Channel Settings 165

9.1 Overview 165

9.2 Operation Procedure (Input Channel Setting)

9.3 Setting the CHANNEL Screen

9.3.1 Setting the Waveform Display Color 169

9.3.2 Setting the Waveform Display Graph Position 169

9.3.3 Setting the Voltage Axis Range 170

9.3.4 Setting the Input Coupling 170

9.3.5 Setting the Magnification/Compression Ratio Along the Voltage Axis 171

9.3.6 Setting the Zero Position

9.3.7 Setting the Low-pass Filter

9.3.8 Setting the Logic Inputs 174

166 168

172 173

9.4 Copying Channel Settings 175

9.5 Zero Settings

9.5.1 Zero Adjustment 176

9.5.2 Zero Offset Setup

176

177

9.6 Channel Guide Function 179

9.7 Setting the Variable Function

180

9.8 Scaling Function (SYSTEM2)

9.8.1 Setting the Scaling Function 183

9.8.2 Scaling Setting Example 186

182

9.9 Comment Function (SYSTEM 3) 187

9.9.1 Title Comment Entry 187

9.9.2 Analog/Logic Channel Comment Entry 188

9.9.3 Character Entry Procedure

189

9.10 Setting the Waveform Display Screen 191

9.10.1 Entering by CH.SET Key 191

9.10.2 Setting the Vernier Function 192

9.10.3 Direct Channel Setting 193

9.11 Setting the 8937 VOLTAGE/TEMP UNIT 194

9.11.1 Making the Settings of Voltage Measurement 194

9.11.2 Making the Settings of Temperature

Measurement 196

9.12 8938 FFT ANALOG UNIT 199

9.13 Setting the 8939 STRAIN UNIT

200

9.14 8940 F/V UNIT

9.14.1 Frequency Measurement 202

9.14.2 Setting the Count Mode 205

9.14.3 Setting the Pulse Duty Ratio Mode 207

9.14.4 Setting the Voltage Mode

201

209

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9.14.5 Setting the Current Measurement 211

9.15 Setting the 8947 CHARGE UNIT 212

9.15.1 Acceleration Measurement (Charge/Preamp) Selection 213

9.15.2 Setting the Sensor Sensitivity

9.15.3 Setting the Voltage Measurement

215 216

Chapter 10 Trigger Functions 217

10.1 Overview of the Trigger Functions 217

10.2 Operation Sequence (Trigger mode setting)

10.3 TRIGGER Screen Organization

10.4 Trigger Mode

10.5 Pre-trigger

10.6 Trigger Timing (REC only)

10.7 Trigger Source AND/OR Linking

10.8 Analog Trigger

10.8.1 Level Trigger 226

10.8.2 Window Trigger 229

10.8.3 Voltage Drop Trigger 231

10.8.4 Period Trigger 233

10.8.5 RMS Level Trigger 236

218 220 221 222 224 225 226

10.9 Logic Trigger 238

10.10 External Trigger Function

10.11 Timer Trigger Function

10.12 Manual Trigger

10.13 Trigger Output Terminal

240 241 244 244

Chapter 11Waveform Display Screen Operation 245

11.1 Scrolling the Waveform 246

11.2 Using the A･B Cursors

11.2.1 Using the Line Cursors (Vertical) 248

11.2.2 Using the Line Cursors (Horizontal) 249

11.2.3 Using the Trace Cursors 250

11.2.4 Using the A･B Cursors (X-Y Screen)

11.3 Magnification/compression Ratio Along the Time Axis 253

11.4 Zoom Function (MEM only)

11.5 Input Level Monitor Function

11.6 View Function (VIEW key)

11.6.1 Position Display 256

11.6.2 Block Display (MEM only)

247

252

254 255 256

257

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Chapter 12 SYSTEM Screen Settings 259

12.1 Overview 259

12.2 SET UP Screen (SYSTEM 1)

12.2.1 Using Channel (MEM only) 260

12.2.2 Start Backup

12.2.3 Backlight Saver

12.2.4 Display Color

12.2.5 Beep Sound

12.2.6 Display Language 263

12.2.7 Grid Type 263

12.2.8 Channel Marker 263

12.2.9 Time Value

12.2.10 List & Gauge

12.2.11 Printer Density 264

12.2.12 Upper-lower Values Print 264

12.2.13 0 Position Comment 265

12.2.14 Counter Print

12.2.15 Numerical Input

12.2.16 Variable Auto Calibration 266

260

261 261 262 262

264 264

265 265

12.3 SCALING Screen (SYSTEM 2) 266

12.4 COMMENT Screen (SYSTEM 3)

12.5 INTERFACE Screen (SYSTEM 4)

12.5.1 Output Destination by the COPY Key 269

12.5.2 Output Destination by the PRINT Key 269

12.5.3 Interface Settings 269

12.5.4 Setting the SCSI ID 270

12.5.5 Setting the Internal MO (when the 9607 is installed) 270

12.5.6 Setting the LAN 271

267 268

12.6 INITIALIZE Screen 278

12.6.1 Setting the Clock 278

12.6.2 Clearing the Waveform Data 278

12.6.3 System Reset 279

12.6.4 List System Configuration 279

12.7 Self-check 280

12.7.1 ROM/RAM Check 280

12.7.2 Printer Check

12.7.3 Display Check 281

12.7.4 Key Check 281

12.7.5 PC Card Check 281

280

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Chapter 13 Printout of Measurement Data 283

13.1 Printout of Measurement Data Operating Procedure

284

13.2 Setting the STATUS Screen (printout)

13.2.1 Setting the Display Format 286

13.2.2 Setting the Print Mode

286

287

13.3 Setting the CHANNEL Screen (printout) 288

13.3.1 Setting the Print Density 288

13.3.2 Setting the Waveform Display Graph Position 289

13.4 Setting the SYSTEM Screen (printout) 290

13.4.1 SET UP Screen (SYSTEM 1) 290

13.4.2 SCALING Screen (SYSTEM 2) 292

13.4.3 COMMENT Screen (SYSTEM 3)

13.4.4 Setting the Output Destination by the COPY Key

13.4.5 Setting the Output Destination by the PRINT Key 294

292

293

13.5 Example of Printer Output 296

13.6 Printing Procedure

13.6.1 Manual Print 303

13.6.2 Auto Print 304

13.6.3 Real Time Print 305

13.6.4 Partial Print 306

13.6.5 Screen Hard Copy 307

13.6.6 List Print 307

13.6.7 Report Print 307

303

13.7 External Printer (color print) 308

Chapter 14 Storing Measurement Data 311

14.1 Floppy Disk 312

14.2 9607 MO UNIT (Option)

14.2.1 Setting the Internal MO 314

14.3 PC Card 315

14.3.1 Using the PC Card Slot (PC Card with a Cable Only) 316

14.4 SCSI Interface 317

14.4.1 SCSI Interface Specifications 317

14.4.2 Setting the MO Disk Drive

14.4.3 Setting the SCSI ID

14.5 Selecting the Media Type 320

14.6 Initializing (FORMAT)

14.7 Saving the Data (SAVE)

313

318 319

321 322

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14.7.1 Setting the Data to Store 324

14.8 Loading the Data (LOAD) 331

14.9 File Information (INFO) 335

14.10 Deleting the Data (DELETE)

14.11 Sorting Files (SORT)

14.12 Operating the Directory

14.12.1 Making a Directory (MK DIR) 338

14.12.2 Changing a Directory (CH DIR) 339

14.12.3 Deleting a Directory (RM DIR) 340

336 337 338

14.13 Printing the File List 341

Chapter 15 Memory Segmentation Function 343

15.1 Using the Sequential Save Function 344

15.2 Using the Multi-Block Function (MEM)

349

Chapter 16 Waveform Operation Function 353

16.1 Waveform Parameter Calculation (MEM) 353

16.1.1 Making Settings for Waveform Parameter Calculation

16.1.2 Making Settings for Waveform Parameter Evaluation

16.1.3 Setting the Waveform Parameter GO/NG Stop Mode 358

16.1.4 Executing Waveform Parameter Calculation 359

355

357

16.2 Calculating Waveform Data 361

16.2.1 Preparing for Waveform Processing 362

16.2.2 Defining the Processing Equation 363

16.2.3 Copying an Equation 366

16.2.4 Setting the Channel for Recording Processing Results 367

16.2.5 Setting the Display Scale and Number of Moved Points

16.2.6 Perform Waveform Processing

368 370

16.3 Waveform GO/NG Evaluation (MEM, FFT) 372

16.3.1 Setting the Waveform Area 374

16.3.2 Setting the Waveform Evaluation Mode 375

16.3.3 Setting the GO/NG Stop Mode 375

16.3.4 Creating the Evaluation Area 376

16.3.5 Editor Command Details 376

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Chapter 17 External Input/ Output Terminals/ Key Lock

Function 379

17.1 External Input/Output Terminals 379

17.1.1 Connecting the Terminals 379

17.1.2 External Trigger Input Terminal [EXT TRIG] 380

17.1.3 Trigger Output Terminal [TRIG OUT] 380

17.1.4 External Sampling Terminal [EXT SMPL] 381

17.1.5 External Print Terminal / External Start/Stop Terminal 381

17.1.6 GO/NG Evaluation Output Terminal 382

17.2 Using the Key Lock Function 383

Chapter 18 Specifications 385

18.1 General Specifications 385

18.2 External Data Storage and Interface

18.3 Trigger Unit

18.4 Memory Recorder Function

18.5 Recorder Function

18.6 RMS Recorder Function

18.7 Recorder & Memory Function

18.8 FFT Function

18.9 Auxiliary Functions

18.10 Others

18.11 System Operation

387 389 390 391 392 393 394 395 396 397

18.12 Maximum Recording Length for Time Axis Settings

18.13 Memory Capacity and Recording Length

398 400

Chapter 19 Logic and Analog Inputs 401

19.1 Logic Inputs 401

19.2 Analog Inputs

19.2.1 8936 ANALOG UNIT 403

19.2.2 8937 VOLTAGE / TEMP UNIT

19.2.3 8938 FFT ANALOG UNIT

19.2.4 8939 STRAIN UNIT 407

19.2.5 8946 4ch ANALOG UNIT 408

19.2.6 8940 F/V UNIT 409

19.2.7 8947 CHARGE UNIT 411

403

404 406

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Chapter 20 Maintenance and Service 415

20.1 Maintenance and Inspection 415

20.2 Replacing the Input Units

20.3 Replacing the Fuse of the 9433

20.4 Removing the Battery Before Discarding the Unit

417 418 419

20.5 Troubleshooting 420

Appendix APPENDIX 1

Appendix 1 Error Messages APPENDIX 1 Appendix 2 Glossary Appendix 3 Reference

Appendix 3.1 Sampling APPENDIX 8 Appendix 3.2 Aliasing APPENDIX 8 Appendix 3.3 Measurement Limit Frequency APPENDIX 9 Appendix 3.4 Recorder Function APPENDIX 10 Appendix 3.5 RMS Recorder Function APPENDIX 11 Appendix 3.6 Averaging Equations APPENDIX 12 Appendix 3.7 "2-point method" Scaling Equation

APPENDIX 12

Appendix 3.8 Waveform Parameter Calculation Details

APPENDIX 13 Appendix 3.9 Details on Operators Appendix 3.10 FFT Function

APPENDIX 6 APPENDIX 8

APPENDIX 16 APPENDIX 19

Appendix 4 Size of a Waveform File (Binary data)

APPENDIX 26

Appendix 5 Size of a Waveform File (Reference value

of text data)

Appendix 6 FFT File Size

APPENDIX 28 APPENDIX 30

Appendix 7 Real-Time Save Files Size (Memory data)

Appendix 8 Waveform Viewer (Wv)

Appendix 8.1 Starting the Waveform Viewer

APPENDIX 33 Appendix 8.2 Waveform Viewer Menus Appendix 8.3 Using the Waveform Viewer Appendix 8.4 Conversion to CSV Format APPENDIX 39 Appendix 8.5 Batch Conversion APPENDIX 40

APPENDIX 31 APPENDIX 32

APPENDIX 34 APPENDIX 36

Index INDEX 1

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Introduction

Thank you for purchasing the HIOKI "8841/42 MEMORY HiCORDER." To obtain maximum performance from the product, please read this manual first, and keep it handy for future reference.

Inspection

When the unit is delivered, check and make sure that it has not been damaged in transit. In particular, check the accessories, panel switches, and connectors. If the unit is damaged, or fails to operate according to the specifications, contact your dealer or HIOKI representative.

Accessories

Power cord 1 9231 RECORDING PAPER 1 Protective cover 1 Roll paper attachment 2 PC card protector 1 Connector cable label 1 Instruction Manual 1 Application Disk (CD-R) 1

Options

Input units

Cards

8936 ANALOG UNIT 8937 VOLTAGE/TEMP UNIT

8938 FFT ANALOG UNIT 8939 STRAIN UNIT 8940 F/V UNIT

8946 4 ch ANALOG UNIT 8947 CHARGE UNIT

9557 RS-232C CARD 9558 GP-IB CARD 9559 PRINTER CARD 9578 10BASE-T LAN CARD 9607 MO UNIT (with eject pin) 9608 MEMORY BOARD (24M-WORD）total 32 M words 9626 PC CARD 32M 9627 PC CARD 64M 9726 PC CARD 128M 9727 PC CARD 256M 9728 PC CARD 512M 9729 PC CARD 1G

Cables and adapter

9433 DC POWER ADAPTER 9197 CONNECTION CORD (for high voltage, maximum input voltage 500 V) 9198 CONNECTION CORD (for low voltage, maximum input voltage 300 V) 9199 CONVERSION ADAPTOR 9217 CONNECTION CORD (isolated between BNC and BNC) 9320 LOGIC PROBE (maximum input voltage 50 V) 9321 LOGIC PROBE (maximum input voltage 250 V) 9322 DIFFERENTIAL PROBE

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Introduction

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9324 POWER CORD (for logic connector) 9325 POWER CORD (for 8940 F/V UNIT sensor connector) 9665 10:1PROBE 9666 100:1PROBE

9303 PT 9318 CONVERSION CABLE (for 9270-72, 9277-79) 9319 CONVERSION CABLE (for 3273)

Clamps

3273 CLAMP ON PROBE (DC to 50 MHz) 9018-10 CLAMP ON PROBE (10 to 500 A, 40 Hz to 3 kHz)

9132-10 CLAMP ON PROBE (20 to 1000 A, 40 Hz to 1 kHz)

9270 CLAMP ON SENSOR (20 A, 5 Hz to 50 kHz)

9271 CLAMP ON SENSOR (200 A, 5 Hz to 50 kHz)

9272 CLAMP ON SENSOR (20/200 A 9277 UNIVERSAL CLAMP ON CT (20 A, DC to 100 kHz) 9278 UNIVERSAL CLAMP ON CT (200 A, DC to 100 kHz)

9279 UNIVERSAL CLAMP ON CT (500 A, DC to 20 kHz)

9555 SENSOR UNIT (used with the 9270 to 9272, and the 9277 to 9279)

Others

8910 CAN ADAPTER 9333 LAN COMMUNICATOR 9335 WAVE PROCESSOR 9397-01 CARRYING CASE (for 8841) 9349 CARRYING CASE (for 8842) 9231 RECORDING PAPER (6 rolls)

220H PAPER WINDER

*1: Only used with 8841/ *2: no CE marking

NOTE

The 9270 to 9272 CLAMP ON SENSORs and 9277 to 9279 UNIVERSAL CLAMP ON CTs are designed for use only with the 9555 SENSOR UNIT, and cannot be used alone.

,5Hzto10kHz)

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Inspection

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iii

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Safety Notes

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

DANGER

Safety symbols

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

In the manual, the symbol indicates particularly important

information that the user should read before using the product.

The symbol printed on the product indicates that the user should refer to a corresponding topic in the manual (marked with the symbol) before using the relevant function.

Indicates a grounding terminal.

Indicates AC (Alternating Current).

Indicates DC (Direct Current).

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

Indicates the ON side of the power switch.

Indicates the OFF side of the power switch.

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Safety Notes

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

DANGER

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

WARNING

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

CAUTION

NOTE

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

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

Measurement categories (Overvoltage categories)

This instrument conforms to the safety requirements for CAT II (370 V) measurement products (using with the 8936 ANALOG UNIT). To ensure safe operation of measurement instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as CAT I to CAT IV, and called measurement categories. These are defined as follows.

CAT

Ⅰ

Secondary electrical circuits that are connected to a wall outlet through a transformer or similar device.

CAT

Ⅱ

Primary electrical circuits in equipment connected to a wall outlet via a power cord (portable tools, household appliances, etc.)

CAT

Ⅲ

Primary electrical circuits of heavy equipment (fixed installations) connected directly to the distribution panel, and feeders between the distribution panel and outlets.

CAT

Ⅳ

The circuit from the service drop to the service entrance, then to the power meter and to the primary overcurrent protection device.

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

The measurement categories comply with the Overvoltage Categories of the IEC60664 Standards.

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Safety Notes

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Notes on Use

In order to ensure safe operation and to obtain maximum performance from the unit, observe the cautions listed below.

Inspection before Use

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

DANGER

Power Supply Connections

Before connecting the unit, make sure that the power supply voltage matches the rated power supply voltage of the unit.

Probe Connection, Measurement Voltage Input

Maximum input voltage ratings for the input unit and the input terminals

of the unit are shown below. To avoid the risk of electric shock and damage to the unit, take care not to exceed these ratings.

The maximum rated voltage to earth of the input unit (voltage

between input terminals and main unit frame ground, and between inputs of other analog units) is shown below. To avoid the risk of electric shock and damage to the unit, take care that voltage between channels and between a channel and ground does not exceed these ratings.

The maximum rated voltage to earth rating applies also if an input

attenuator or similar is used. Ensure that voltage does not exceed these ratings.

When measuring power line voltages with the 8936 or 8938, always

connect the probe to the secondary side of the circuit breaker. Connection to the primary side involves the risk of electric shock and damage to the unit.

Always use the supplied connector cables. Any exposed metal

sections in a connector cable consist a risk of electric shock. The logic units all have and the unit have a common ground. The external I/O terminal and the unit have a common GND.

Input/output terminal Maximum input voltage Maximum rated voltage to earth

8936 (input) 400 VDC max. 370 VAC/DC

8937 (input) 30 Vrms or 60 VDC 30 Vrms or 60 VDC

8938 (input) 400 VDC max. 370 VAC/DC

8939 (input) 10 VDC max. 30 Vrms or 60 VDC

8940 (input) 30 Vrms or 60 VDC

(BNC/sensor connector terminal)

8946 (input) 30 Vrms or 60 VDC 30 Vrms or 60 VDC

8947 (input)

*1: The maximum allowable charge that can be applied to the miniature connection terminals is 500 pC at the most sensitive of the six ranges, and 50,000 pC at the least sensitive range.

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30 Vrms or 60 VDC (BNC terminal) 30 Vrms or 60 VDC (BNC terminal)

30 Vrms or 60 VDC (BNC terminal) Not insulated (Sensor connector terminal)

Notes on Use

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Input/output terminal Maximum input voltage Maximum rated voltage to earth

9322

EXT TRIG/ START・STOP/ PRINT/ EXT SMPL

TRIG OUT/ GO/ NG

2000 VDC, 1000 VAC (CAT II)

600 VAC/DC (CAT III)

-5 to +10 VDC

-20 V to +30 VDC

500 mA max./ 200 mW max.

When using grabber clips 1500 VAC/DC (CAT II), 600 VAC/DC (CAT III) When using alligator clips 1000 VAC/DC (CAT II), 600 VAC/DC (CAT III)

Not insulated

DANGER

Logic Probe Connection

The logic input and 8841/42 Unit share a common ground. Therefore, if

power is supplied to the measurement object of the logic probe and to the 8841/42 from different sources, an electric shock or damage to the equipment may result. Even if power is supplied from the same system, if the wiring is such that a potential difference is present between the grounds, current will flow through the logic probe so that the measurement object and 8841/42 could be damaged. We therefore recommend the following connection method to avoid this kind of result. Refer to Section 2.5, "Logic Probe Connection" for details.

(1) Before connecting the logic probe to the measurement object, be sure

that power is supplied from the same outlet box to the measurement object and the 8841/42 using the supplied power cord.

(2) Before connecting the logic probe to the measurement object,

connect the ground of the measurement object to the 8841/42 ground terminal. Also in this case, power should be supplied from the same source. Refer to Section 2.2, "Power Supply and Ground Connections" for grounding terminal details.

Replacing the Input Units

In order to avoid accidents from electric shock, before removing or

replacing an input unit, check that the connector cables and thermocouple are disconnected, turn off the power, and remove the power cable.

Normally keep all input units installed permanently. If a unit is not

fitted, it must be replaced by a blanking panel. If the unit is operated with an input unit not in place it poses a shock hazard.

Differential Probe Connection

When using grabber clips, the 9322's maximum rated voltage to

earth is 1500 VAC/DC; when using alligator clips, it is 1000 VAC/DC. To avoid electrical shock and possible damage to the unit, never apply voltages greater than these limits between the input channel terminals and chassis, or across the inputs of two 9322s.

Maximum input voltage is 1000 VAC/2000 VDC. Do not measure

voltage in excess of these limitations, as doing so may damage the unit or cause an accident that might result in injury or death.

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Notes on Use

Page 21

vii

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WARNING

Installation Environment

To avoid electric shock, do not allow the product to get wet, and do

not use it when your hands are wet.

Grounding the Unit

The unit is constructed so as to be connected to a ground line via a

three-core power cord that is supplied with the unit. In order to

avoid electric shock, connect the unit to a properly grounded (3-pin)

outlet using the power cord provided.

Before Powering on

Check that the power supply is correct for the rating of the unit.

(The AC fuse is integrated in the unit.)

Usage Precautions for the Internal MO Drive (option)

Please do not attempt to disassemble the MO drive.

Laser radiation can be emitted when the MO drive is open. Avoid

looking directly into the laser when the MO drive is open. Maximum

laser output is 50 mW (at 685 nm, pulsed).

A laser warning label is attached to the bottom of the 8841/42 Unit.

Refer to Section 1.2, "Identification of Controls and Indicators" for

the label location.

CAUTION

Installation Environment

This product should be installed and operated indoors only, between 5

C and 35% to 80%RH.

to 40 This product is not designed to be entirely water- or dust-proof. To avoid

damage, do not use it in a wet or dusty environment. Do not store or use the product where it could be exposed to direct

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

Using a printer

Using the printer in a high-temperature or high-humidity environment should be avoided at all costs. This can seriously reduce the printer life.

Using the connecting cables

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

Recording paper

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

Printing is not possible if the recording paper is loaded wrong-side up. (Refer to Section 2.8, "Loading Recoding Paper.")

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Notes on Use

Page 22

viii

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

CAUTION

Storing

When the unit is not to be used for an extended period, set the head up/down lever to the "head up" position. This will protect the printer head and prevent deformation of the rubber roller.

Precautions on carrying this equipment

The terminal guard of the equipment protects the inputs. Do not hold this guard when carrying the equipment. To carry this equipment, use the handle. See Section 1.2.

Shipping

Remove the printer paper from the unit. If the paper is left in the unit,

･

paper support parts may be damaged due to vibrations.

Remove the PC card, floppy disk, MO disk and SCSI cable from the unit.

･

If reshipping the unit, preferable use the original packing.

･

Do not transport using the 9397-01 or 9349 CARRYING CASEs.

･

Others

In the event of problems with operation, first refer to Section 20.5,

･

"Troubleshooting".

Carefully read and observe all precautions in this manual.

･

Handling the CD-R

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

･

disc or scratch the printing.

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

･

on anything hard.

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

･

of the label printing disappearing.

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

･

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

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

･

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

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

･

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

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

･

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

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

Notes on Use

Page 23

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Chapter Summary

Chapter 1 Product Overview

Contains an overview of the unit and its features.

Chapter 2 Installation and Preparation

Explains how to set the unit up for measurement.

Chapter 3 Basic Key Operation

Explains how to operate the keys and the Jog/Shuttle control for carrying out basic measurement functions.

Chapter 4 Memory Recorder Function

Explains how to use the memory recorder functions of the unit.

Chapter 5 Recorder Function

Explains how to use the recorder functions of the unit.

Chapter 6 RMS Recorder Function

Explains how to use the RMS recorder functions of the unit.

Chapter 7 Recorder and Memory Recorder Function

Explains how to use the recorder and memory recorder functions of the unit.

Chapter 8 FFT Function

Explains how to use the FFT functions of the unit.

Chapter 9 Input Channel Settings

Explains how to make settings using the channel setting screen.

Chapter 10 Trigger Functions

Explains how to use the trigger functions of the unit.

Chapter 11 Waveform Display Screen Operation

Explains how to perform waveform scrolling, how to use the A･B cursors and so.

Chapter 12 SYSTEM Screen Settings

Explains how to make settings using the system setting screen.

Chapter 13 Printout of Measurement Data

Explains how to print out measurement data and how to read printed charts.

Chapter 14 Storing Measurement Data

Explains how to store, recall, and delete measurement data and measurement settings.

Chapter 15 Memory Segmentation Function

Explains how to use the Memory Segmentation Function.

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Chapter Summary

Page 24

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Chapter 16 Waveform Operation Function

Explains how to use the Calculating, Waveform Parameters/Evaluating Parameter value and Waveform GO/NG Evaluation.

Chapter 17 External Input/ Output Terminals/ Key Lock Function

Gives specifications and usage details of the external input/output terminals, and explains how to use the key lock function.

Chapter 18 Specifications

Contains general specifications and detailed function specifications.

Chapter 19 Logic and Analog Inputs

Contains specifications and precautions for logic input section and input amplifier units.

Chapter 20 Maintenance and Service

Describes maintenance procedures.

Appendix

Contains information that is necessary for using this unit, including a description of error messages, a glossary, and an explanation how to increase memory.

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Chapter Summary

Page 25

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Chapter 1

1.1 Major Features

(1) Waveform recording performance

For the 8841, using the 8946 4ch ANALOG UNIT, waveform recording can be performed in up to 16 channels with 12-bit resolution (8841). With the 8842, waveform recording can be performed for up to 16 channels at 12-bit resolution, for any combination of input units.

(2) Vertical display

The 10.4-inch vertically-mounted TFT color LCD display has a resolution of 640×480 dots.

Product Overview

(3) Five functions

Memory recorder with up to 1μs (all channels simultaneously) sampling

・

period.

Real-time recording capability to paper in recorder function

・

RMS recorder function for recording rms values of AC power supply lines

・

and DC sources.

Recorder & Memory Recorder function provides combined recorder and

・

memory recorder functions

FFT function offers 12 types of analysis functions

・

(4) Storage capacity

The 8841/8842 has a standard storage capacity of 8 M words, expandable to 32 M words with memory upgrades.

(5) Trigger function

Digital trigger circuit

・

Trigger types: level trigger, window-in trigger, window-out trigger, voltage

・

drop trigger, RMS level trigger, period trigger, logic trigger (pattern trigger)

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1.1 Major Features

Page 26

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

(6) Simple function key interface (GUI)

Thanks to its GUI-inspired design using large function key graphics, the unit is easy to set up and operate.

(7) On-line help

On-line help guides the user through operation steps and various functions.

(8) Scaling function

By setting the physical amount and the unit to be used for 1 V input, the measurement result can be converted into any desired scale.

(9) Additional recording function

When enabled, the memory is regarded as printer paper.

(10) Input units

The analog inputs are floating, and so each input can be connected to its own independent potentials.

Select input units suitable for measurements.

(11) Built-in thermal printer

Thermosensitive recording method using a thermal line head

・

The built-in printer delivers waveform printouts on the spot.

The printer can also be used to print screen shots and parameter information.

・

Report print (A4 size) can be printed.

(12) External storage means

The waveform data and/or setup conditions can be stored on a floppy disk, MO disk, or PC card (SRAM, flash ATA, or HDD card).

(13) SCSI interfaces

If a MO drive is connected to the SCSI interface, the waveform data and/or setup conditions can be stored on a MO disk.

(14) GP-IB, RS-232C, and LAN (10BASE-T) interface

Remote control including input unit is possible.

(15) External print

If a color printer is connected to the printer card, the data can be printed in color.

(16) Dual-language capability

Display language is switchable between Japanese and English.

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1.1 Major Features

Page 27

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1.2 Identification of Controls and Indicators

(example: 8841)

4 5

1 2

3 6

7 8 9

STATUS key

CHAN key

DISP key

SYSTEM key

TRIG key

26 27 28

Front Panel

Causes the display to show the STATUS screen which serves for setting most measurement parameters.

Causes the display to show the CHANNEL or Variable screen which serves for making input channel settings.

Causes the display to show measurement and analysis results. Causes the display to show the SYSTEM screen which serves for making

system-wide settings such as for the scaling function.

Causes the display to show the TRIGGER screen. Setting the trigger functions.

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1.2 Identification of Controls and Indicators

Page 28

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FILE key

Causes the display to show the FILE screen which serves for reading, storing, etc. the waveform data etc.

PRINT key

Serves to print out stored waveforms. Output destination can be set on the SYSTEM4 screen.

COPY key

Serves to print out a hard copy of the current screen display. Copy destination can be set on the SYSTEM4 screen

FEED key

VALUE key

WAVE key

A･BCSRkey

Jog

Causes the printer paper to advance for as long as the key is pressed.

Uses to select the numerical values setting.

Uses to select the the waveform scrolling.

Uses to select the the A･B cursor moving.

Rotary control knob that serves to change values, move the A･B cursors, and scroll the waveform.

Shuttle

Concentric ring that serves to change values, move the A･B cursors, and to scroll the waveform. The speed of movement is proportional to the rotation angle.

CURSOR key

STOP key

These keys serve to move the flashing cursor in the four directions.

Stops measurement and analysis. Pressing this key twice stops measurement.

START key

Initiates the measurement and analysis. During measurement, the LED above the key is lit.

TIME/DIV key

MANU TRIG key

CH.SET key

Serves to set the speed for inputting and storing the input signal.

Serves to cause manual triggering.

Sets the input channel on the display screen Toggles the screen among those for analog channels (1 to 16) and logic channels (A to D).

LEVEL MONl key

VIEW key

Serves to check the input signal level.

Serves to indicate the position of the currently displayed screen information in relation to the entire recording length.

Call up information about the status of memory block.

AUTO key

Pressing this key activates automatic setting of time axis range and voltage range values of input waveform.

HELP key

F1 to F5 key

Channel select/ input value keys

Provides on-line help.

Serve to select setting items.

Selects channel or sets numerical value

RANGE knob

POSITION knob

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

1.2 Identification of Controls and Indicators

Sets the measurement range for the channel.

Sets the zero position for the channel.

Page 29

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

AC power switch

AC connector

Function ground terminal (GND)

Right Side Panel

Switches on or off the AC power supply.

The supplied power cord must be plugged in here.

Connects to the earth.

12 13

DC connector

Logic probe connectors

Input unit slots

Fastening screw

Analog input connector

FD slot

SCSI connector

PC card slot

Eject button

External start/stop terminals

External print terminal

GO evaluation output terminal

NG evaluation output terminal

Ground terminal (GND)

External sampling terminal

Trigger terminals

Blowing slot

Connects to the optional 9433 DC POWER ADAPTER.

Input connector for the logic input section, designed for the dedicate logic probes (CH A to D).

These slots accept input units.

Secures the plug-in unit.

Unbalanced analog input. (on ANALOG UNIT)

Floppy disk is inserted.

An MO drive can be connected.

Inserts the PC card.

Removes the PC card.

Start and stop operation can be controlled.

Print operation can be controlled.

When the waveform evaluation has resulted in GO, a signal is output from this terminal.

When the waveform evaluation has resulted in NG, a signal is output from this terminal.

Uses with⑬to⑲(except⑰)terminals.

Allows input of an external sampling signal. (in Memory recorder and FFT functions)

Can be used to synchronize multiple units, using the EXT TRIG input and TRIG OUT output.

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1.2 Identification of Controls and Indicators

Page 30

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

2 23 1 2

Left Side Panel

Upper Panel

Bottom Panel

Rear Panel

Handle

Ventilation slots

Printer

Stand

Laser warning label (when the 9607 MO UNIT is installed)

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

1.2 Identification of Controls and Indicators

Serves for transporting the 8841/42.

The unit can also be propped up at an angle using the stand.

Page 31

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Chapter 2

Installation and Preparation

2.1 Installation of the Unit

Installation orientation

Install the unit on a flat, level surface. The unit can also be propped up at an angle, using the stand.

NOTE

Stand

When the MO drive is used, do not use the stand to prop up the unit.

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2.1 Installation of the Unit

Page 32

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

Ambient conditions

Temperature 5 to 40 ,23±5 recommended for high-precision

measurements.

Humidity 35 to 80%RH (no condensation); 50±10%RH (no

condensation) recommended for high-precision measurements.

Ventilation Take care not to block the ventilation openings and assure

proper ventilation. When using the unit in an upright position, take care not to block the openings on both side.

entilation

Blowing slot

entilation

Right side

Upper side

Avoid the following locations:

・

Subject to direct sunlight.

・

Subject to high levels of dust, steam, or corrosive gases (Avoid using the

entilation

Left side

Bottom side

equipment in an environment containing corrosive gases (e.g., H2S, SO2, NI2,andCI2) or substances that generate harmful gasses (e.g., organic silicones, cyanides, and formalins).

・

Subject to vibrations.

・

In the vicinity of equipment generating strong electromagnetic fields.

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2.1 Installation of the Unit

Page 33

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2.2 Power Supply and Ground Connections

2.2.1 Connecting the AC Power Supply

WARNING

Check the following points before connecting the unit to a power

supply. Take care never to exceed the power supply ratings given below, to avoid the risk of electric shock and damage to the unit.

①

Power supply matches Rated supply voltage (100 to 240 VAC:

Voltage fluctuations of taken into account.) and rated supply frequency (50/60 Hz).

②

The AC power switch of the 8841/42 is set to OFF.

③

Use only the supplied AC power cord.

When supplying power with an inverter or an uninterruptible power

supply (UPS), use a device that complies with the following conditions. To avoid the risk of electric shock and damage to the unit, do not use devices that have a voltage frequency outside the specified range, or that output square waves.

①

Voltage: AC100 V to 240 V

②

Power frequency: 50/60 Hz

③

Sine wave output (Do not use devices that have an unstable

output, even if the output is sinusoidal.)

To avoid electric shock and ensure safe operation, connect the

power cable to a grounded (3-contact) outlet.

10% from the rated supply voltage are

NOTE

1. Verify that the AC power switch of the 8841/42 is set to OFF.

2. Plug the grounded three-core power cord supplied into the AC power connector on the right side of the 8841/42.

3. Plug the power cord into an AC outlet corresponding to the rating of the 8841/42.

The fuse is incorporated in power supply. It is not user-replaceable. If a problem is found, contact your nearest dealer.

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2.2 Power Supply and Ground Connections

Page 34

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2.2.2 Connecting the 9433 DC POWER ADAPTER

DANGER

WARNING

Before making connections, make sure that the 9433 DC POWER ADAPTER switch is turned off. If the 8841/8842 is connected to a device such as a battery while the switch is in the on position, a spark may be given off, damaging the 8841/8842.

The rated supply voltage of the 9433 is 10 to 28 VDC (Voltage

fluctuations of account.).

The 9433 DC POWER ADAPTER generates heat. To provide

adequate heat dissipation, avoid placing objects on top of the 8841/8842 or mounting it in confined spaces.

When connecting the 9433, take care not to mix up the red (+) and

black (-) lead. If polarity is reversed, the 9433 may be damaged.

When wishing to extend DC cable, use a cable of identical or better

rating as the cable of the input side.

The 9433 is made for use specifically with the 8841/8842 MEMORY

HiCORDER. Do not use with any other equipment.

10% from the rated supply voltage are taken into

NOTE

1. Verify that the 9433 switch is set to OFF.

2. Align the ridge of the connector on the unit with the groove in the plug and insert the plug fully, and rotate the plug of the connector to lock.

3. Connect the red input cable to the positive side (+) and the black cable to the negative side (-).

4. To remove the cable, rotate it.

･

This unit is not equipped to charge an external battery.

･

When using a battery, take care not to deplete it completely.

･

When the 8841/8842 detects an overcurrent or overvoltage on the output, it will shut down. To turn power back on, turn off 9433 DC POWER ADAPTER switch, wait approximately one minute, then turn on the switch.

･

If both the AC power supply and 9433 are connected to the 8841/8842, the AC power supply has priority. However, even when the 8841/8842 runs off the AC power supply, the 9433 remains in standby mode and consumes some power. Keep this in mind when connecting the 9433 to the battery while the 8841/8842 is connected to an AC power source.

･

Input cord rating: 37 A (allowable current)

･

Failure of the 9433 to power on may indicate a blown fuse.

･

For replacing the fuse, see Section 20.3.

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2.2 Power Supply and Ground Connections

Page 35

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Estimated battery operation hours (at room temperature)

Battery type: 12 V, 38 Ah, fully charged

Units

Operation condition

Printer not used

(trigger waiting)

Printer used

(recorder function

500 ms/DIV,

all store)

Actual running time may differ, depending on battery age, charge condition, ambient temperature, and other factors.

If the 9433 is connected to the 8841/8842, and the adapter switch is turned on, even when the 8841/8842 runs off the AC power supply, the 9433 remains in standby mode and consumes some power. In this case, the battery operation time is 95 hours.

Specification of the 9433 DC POWER ADAPTER

Accuracy at 23

8936 installed 8946 installed 8936 installed

Approx. 9 h Approx. 7 h 30 min Approx. 7 h

Approx. 2 h 50 min Approx. 2 h 40 min Approx. 2 h 40 min

, 35% to 80%RH, after 30-minutes warming-up time.

8841 8842

Input voltage range

Rated output voltage

Output voltage accuracy

Rated output current

Efficiency

Maximum rated power

Temperature and humidity range for use

Temperature and humidity range for storing

Location for use

Dielectric strength

Insulation voltage

Dimensions

Mass

10 to 28 VDC

24 VDC

24 VDC±2%

70% or more（12 VDC input, rated output

250 VA

0 to 40 (32 to 104 ), 35% to 85%RH (with no condensation)

-20 to 60 (-4 to 140 ) 10% to 90%RH (with no condensation)

According to specifications for the 8841/8842 MEMORY HiCORDER

500 VDC for a minute (between input and output, between input and unit)

100 MΩor more / 500 VDC (between input and output, between input and unit)

Approx. 110W×65H×150D mm (4.33"W

2.56"H×5.91"D) Input cable: 2000 mm (78.7") Output cable: 500 mm (19.69")

Approx. 1250 g (44.1 oz) approx.

）

Accessory

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

Spare fuse（class A melting fuse (NM) 30 A/125 V, 6.4 dia.×31.8 mm

2.2 Power Supply and Ground Connections

）

Page 36

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

2.2.3 Functional Grounding of the 8841/8842

When the 8841/8842 is used in noise-prone environments, connect the functional grounding terminal to improve noise characteristics.

Functional grounding terminal

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2.2 Power Supply and Ground Connections

Page 37

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2.3 Power On/Off

WARNING

Check the following points before the power switch is turned on.

Power supply matches Rated supply voltage (100 to 240 VAC:

Voltage fluctuations of

taken into account.) and rated supply frequency (50/60 Hz). The Unit is correctly installed (Section 2.1). Power cord is correctly connected (Section 2.2). The unit is properly grounded.

・

There is no need for the user to manually select AC or DC power.

・

When both AC and DC power are connected, AC power has priority.

10% from the rated supply voltage are

NOTE

･

If both the AC power supply and 9433 DC POWER ADAPTER are connected to the 8841/8842, the AC power supply has priority. However, even when the 8841/8842 runs off the AC power supply, the 9433 remains in standby mode and consumes some power. Keep this in mind when connecting the 9433 to the battery while the 8841/8842 is connected to an AC power source.

･

After the power switch is turned on, wait approximately 30 min for the 8936, 8938, 8946 and approximately 1 hour for the 8937, 8939, to stabilize the inside temperature of the connected input unit in order to obtain accurate waveforms. Then, make a zero adjustment of the 8936, 8937, 8938, 8946 or perform an auto balancing of the 8939 prior to measurement. Zero adjustment →see Section 9.5.1. Auto balancing →see Section 9.13.

･

When the unit is turned off, it memorizes the currently used settings and reestablishes the same settings the next time the unit is turned on again.

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2.3 Power On/Off

Page 38

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2.4 Connection of the Input Unit

2.4.1 8936/ 8938/ 8946 ANALOG UNITs

WARNING

CAUTION

NOTE

Connector Cable

Never connect the probe to the 8841/42 while the probe is already

connected to the measurement object. Otherwise there is a risk of electric shock.

Use only the specified connection cables.

An insulated BNC connector is used for the specified connection cables to prevent electric shock. If a metal BNC connector is used, electric shock may result, as the input L-terminal and the metal part of the BNC connector will have the same potential.

Use only the specified connection cables. Using a non-specified cable may result in incorrect measurements due to poor connection or other reasons. In addition, the BNC connector may be damaged. For safety reasons, only use the optional 9197, 9198, or 9217

CONNECTION CORD for connection to the analog input units. (For the 8946, use the 9198 CONNECTION CORD.)

9197

(500 V)

(Maximum input voltage :)

Groove of the BNC

Connector guide

9198 (300 V)

9217 (300 V)

Connecting to the main unit

1. Align the BNC connector with the guide groove of the unit input connector, and turn clockwise while pressing in to lock the connector.

2. To remove from the unit, turn the BNC connector counterclockwise to release the lock, then pull it.

Setting channels of the 8946 4 ch ANALOG UNIT (8841 only)

When the 8946 4-channel analog unit is used, input channels 1 to 4 are not

set in this customary sequence on the 8841. The slot position at which the 8946 is mounted determines the set input channel (see the illustration below). To confirm the position of the setting channels, see Section 9.6.

Illustrates active channels when the 8946 is mounted

in each slot.

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2.4 Connection of the Input Unit

Page 39

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2.4.2 8937 VOLTAGE/TEMP UNIT

WARNING

CAUTION

Outer insulation (mantle)

Thermocouple

Inner insulation

25 mm

10 mm

leads

Never connect the cable to the unit while the cable is already

connected to the measurement object. Otherwise there is a risk of electric shock.

When an uninsulated thermocouple is used to measure temperature

at a point carrying electric potential, take care not to touch the terminals and connector screws. Otherwise there is a risk of electric shock.

Between voltage and temperature inputs and unit is insulated.

When disconnecting the BNC connector, be sure to release the lock before pulling off the connector. Forcibly pulling the connector without releasing the lock, or pulling on the cable, can damage the connector. A common GND is used for voltage and temperature input on all channels. Never input voltage and temperature simultaneously, since doing so could result in damage to the sample being tested.

Connecting to the connector cable (voltage measurement)

1. Align the BNC connector with the guide groove of the 8841/42 input connector, and turn clockwise while pressing in to lock the connector. (Use the 9198 CONNECTION CORD for voltage measurement with the

8937.)

2. To remove from the unit, turn the BNC connector counterclockwise to release the lock, then pull it.

Thermocouple connection (temperature measurement)

1. Strip off the insulation as shown in the illustration.

2. Push the tab with a flatblade screwdriver or similar.

3. While keeping the tab depressed, insert a stripped wire into the connector opening.

4. Release the tab to lock the wire.

5. To remove the thermocouple, pull it out with the button depressed.

NOTE

･ To mount and remove the thermocouple, use a tool such as a screwdriver. ･ The push-button terminal block of the 8937 VOLTAGE/TEMP UNIT is

specialized for the thermocouple. Do not use thermocouples other than the specifiedtypes(K,J,E,T,N,R,S,B).

･ If the thermocouple is connected in reverse, the temperature reading will not

be correct.

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2.4 Connection of the Input Unit

Page 40

−

＋＋−

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2.4.3 8939 STRAIN UNIT

CAUTION

Connect only the sensor to the conversion cable supplied with the 8939 STRAIN UNIT. To disconnect the conversion cable, always unlock the plug and pull out the cable.

Connecting to the main unit

1. Align the projection on the unit connector with the cutout on the conversion cable, and insert the plug into the connector.

2. Turn the fixing guide (the colored area in the figure below) so that it engages with the connector guides on the unit, fully insert the fixing guide, and turn it clockwise to lock the plug.

3. To remove the conversion cable from the unit, turn the fixing guide (the colored area in the figure below) counterclockwise to unlock the plug, and pull out the plug.

Connector guide

Projection on the unit connector

Connector

Bridge voltage：2V (Apply voltage)

Cutout on the conversion cable

Fixing guide

Input voltage

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2.4 Connection of the Input Unit

Page 41

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2.4.4 8940 F/V UNIT

DANGER

To avoid electrical accidents, make sure that the MEMORY HiCORDER and the equipment being measured are powered off before making connections. Do not make connections with the power turned on.

When using the 9318/9319 CONVERSION CABLE, there is no isolation between GND the MEMORY HiCORDER and GND of the clamp on sensor/probe. Exercise extreme care in connection to avoid possible damage to the equipment or personal injury.

When connecting 8940 F/V UNIT to 3273, and conductors being measured carry in excess of the safe voltage level (SELV-E) and not more than 300 V, to prevent short circuits and electric shock while the core section is open, make sure that conductors to be measured are insulated with material conforming to (1) Measurement Category l, (2) Double Insulation (Reinforced insulation) Requirements for Working Voltage of 300 V, and (3) Pollution Degree 2. For safeties sake, never use this sensor on bare conductors. The core and shield case are not insulated.

When connecting 8940 F/V UNIT to 3273, do not damage insulation sheathing on testing device.

Refer to the following standards regarding the meanings of underlined terms. IEC 61010-1, IEC 61010-2-031, IEC 61010-2-032

WARNING

CAUTION

When using the clamp-on sensor or clamp-on probe, be sure to use the optional 9318 or 9319 CONVERSION CABLE.

Connection cable connection (Frequency, count, pulse duty ratio and voltage measurement)

Groove of the BNC

Connector guide

Use the optional 9198 CONNECTION CORD for connection to the F/V UNIT.

1. Align the BNC connector with the guide groove of the 8841 input connector, and turn clockwise while pressing in to lock the connector.

2. To remove from the unit, turn the BNC connector counterclockwise to release the lock, then pull it.

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

2.4 Connection of the Input Unit

Page 42

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Clamp connection (Current measurement)

The following clamp-on sensors and clamp-on probes can be connected using the 9318 and 9319 CONVERSION CORDs.

9318

It can be connected to a maximum of 4 channels.

Unit's sensor connector

Conversion cable plug

Conversion cable connector

Adapted clamp's

Projection on the unit connector

Groove on the 3273 CLAMP ON PROBE's termination connector

Sensor connector

on the unit

Conversion cable plug

：9270, 9271, 9272, 9277, 9278, 9279

Connecting the 9318 CONVERSION CABLE

1. Align the groove on the conversion cable plug with the sensor connector on the F/V unit and push inward until the connector locks into place.

2. Align the groove on the conversion cable connector

plug

with the adapted clamp on sensor plug and push inward until the connector locks into place.

3. To unplug the cables, slide the lock ring on each plug outward to unlock it, then pull out the plug.

Connecting the 9319 CONVERSION CABLE

1. Align the groove on the 3273 CLAMP ON PROBE's termination connector with the pin on the BNC connector on the F/V unit, then slide the termination connector over the BNC connector and turn to lock it in place.

2. Align the groove on the conversion cable plug with the sensor connector on the F/V unit and push inward until the connector locks into place.

3. Unlock the conversion cable connector and the power plug on the 3273 before unplugging the cable.

4. To unplug the cables, slide the lock ring on each plug outward to unlock it, then pull out the plug.

9319

：3273

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2.4 Connection of the Input Unit

Page 43

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2.4.5 8947 CHARGE UNIT

WARNING

Never connect the connection cable to the unit while it is connected

to the measurement object, to avoid electric shock.

The BNC connectors for each channel and the miniature connection

terminals share a common ground. Do not connect both types of terminals at the same time.

When the PREAMP measurement mode is selected, voltage (15 V at

2 mA) is applied internally to the BNC connector when measurement starts. To avoid electric shock and damage to measurement objects, select a measurement mode other than PREAMP or turn the unit off when connecting a sensor or probe to the BNC terminals.

Before using an Internal Preamp Type Acceleration Sensor, be sure

that it conforms to the 8947 specifications (15 V at 2 mA). Using a non-conforming sensor could result in damage to the sensor.

Acceleration sensors compatible with the 8947 are as follows: Acceleration sensors with internal preamp (BNC connector with 15 V at 2 mA operating power) Charge-output type accelerator sensors (miniature 10-32 connection terminal)

Connecting an Internal Preamp Type Acceleration Sensor (PREAMP and VOLTAGE modes)

Use a cable with BNC connector to connect the pickup sensor to the unit in PREAMP mode. We recommend the Model 9198 CONNECTION CORD for the VOLTAGE mode.

1. Align the BNC connector with the guide groove of the 8841/42 input connector, and turn clockwise while pressing in to lock the connector.

2. To remove from the unit, turn the BNC connector counterclockwise to release the lock, then pull it.

Connecting a Charge-Output Type Acceleration Sensor (CHARGE mode)

Use a cable with a plug to mate with the miniature connector to connect the pickup sensor to the unit in CHARGE mode (10-32 miniature connection terminal).

1. Insert the miniature connector plug into the miniature connector on the unit, and turn it clockwise until tight.

2. To remove the miniature connector, turn the plug counterclockwise.

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2.4 Connection of the Input Unit

Page 44

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2.5 Logic Probe Connection

DANGER

The logic input and 8841/42 Unit share a common ground. Therefore, if power is supplied to the measurement object of the logic probe and to the 8841/42 from different sources, an electric shock or damage to the equipment may result. Even if power is supplied from the same system, if the wiring is such that a potential difference is present between the grounds, current will flow through the logic probe so that the measurement object and 8841/42 could be damaged. We therefore recommend the following connection method to avoid this kind of result.

(1) Before connecting the logic probe to the measurement object, be

sure that power is supplied from the same outlet box to the measurement object and the 8841/42 using the supplied power cord.

(2) Before connecting the logic probe to the measurement object,

Object to be measured

8841/42

Object to be measured

8841/42

NOTE

GND

Functionground terminal

In this case too, obtain power from the same supply.

Power suppl

Figure 2

Outlet

Figure 1

Ground

・The logic input is located on the rear of the unit. Up

to four probes can be connected.

・Since one logic probe can record 4 channels, the

combined maximum recording capability for logic waveforms is 16 channels.

・Connect the probe by aligning the groove on the plug

with the ridge on the connector.

･ If no logic probe is connected, the corresponding logic waveform is

displayed on the screen at high level.

･ Carefully read the instruction manual supplied with the probe. ･ Do not connect logic probes other than supplied by HIOKI to the logic

inputs.

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2.5 Logic Probe Connection

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2.6 9018-10/9132-10 CLAMP ON PROBE

DANGER

Clamp-on probe should only be connected to the secondary side of a breaker, so the breaker can prevent an accident if a short circuit occurs. Connections should never be made to the primary side of a breaker, because unrestricted current flow could cause a serious accident if a short circuit occurs.

Before using the 9018-10/9132-10 CLAMP ON PROBE, be sure to carefully read its instruction manual and familiarize yourself with the operation principles of this product.

HIOKI

The

9018-10/9132-10 CLAMP ON PROBE can be used to perform current measurement. This probe has a voltage output. The 8841/42 is designed for voltage input. It cannot be used to perform current measurements by itself.

Connections

Connect the BNC connector of the 9018-10/9132-10 CLAMP ON PROBE to the analog input of the 8841/42. Refer to "2.4 Connection of the Input Unit."

9132-10

NOTE

9018-10

･ The 8841/42 will indicate measurement results as voltage. ･ Using the scaling function, units can be converted to "A" for display. ･ When the clamp-on probe is used for measurement, the measurement

precision will be affected both by the 8841/42 precision and clamp-on probe precision ratings. The same is true for cases where other clamps are used.

･ When using the 9018/9132 CLAMP ON PROBE, always use the 9199

CONVERSION ADAPTOR.

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2.6 9018-10/9132-10 CLAMP ON PROBE

Page 46

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2.7 9322 DIFFERENTIAL PROBE Connection

DANGER

When using grabber clips, the 9322's maximum rated voltage to earth is 1500 VAC/DC; when using alligator clips, it is 1000 VAC/DC. To avoid electrical shock and possible damage to the unit, never apply voltages greater than these limits between the input channel terminals and chassis, or across the inputs of two 9322s.

Maximum input voltage is 1000 VAC/2000 VDC. Do not measure voltage in excess of these limitations, as doing so may damage the unit or cause an accident that might result in injury or death.

9322 is a differential probe that connects to input of 8841/42 MEMORY HiCORDER input unit. For more details, refer to its instruction manual.

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2.7 9322 DIFFERENTIAL PROBE Connection

Page 47

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2.8 Loading Recoding Paper

1. Press the stock cover and open it.

Stock cover

Head up/down

lever

2. Put down the head up/down lever.

Holder

Printer roller

3. Insert the attachments into the ends of the roll of recording paper and set the paper into its holder.

ttachment

4. Insert the leading edge of the recording paper from above into the gap behind the printer roller, and pull it out to the other side.

Back side of

paper

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

2.8 Loading Recoding Paper

Page 48

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

5. Align the edges of the recording paper you pulled out of the printer with the edges of the recording paper set into the holder. If the edges of the recording paper are not aligned exactly, the paper will come out crooked when printing.

6. Raise the head up/down lever.

7. Pull the recording paper to the outside through the printer exit slot in the stock cover.

NOTE

8. Close the stock cover, and finish by tearing off the recording paper against the edge of the printer exit slot.

･ Make sure that the recording papers positioned quite straight, if the

recording paper is slanted with respect to the roller there is a danger that later a paper jam will occur.

･ Always put the unit in the head up condition when it is to be transported or

if it is to be stored for a long period of time. If the unit is left to lie in the state where the roller is being subjected to pressure by the head, then the roller may become deformed or the characters may become uneven.

･ Particularly care should be taken not to put the recording paper in back to

front by mistake, because if this happens the waveform cannot be drawn.

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2.8 Loading Recoding Paper

Page 49

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2.9 Care of Recording Paper

Care of recording paper

・While unopened, thermal paper will not be affected by the environment,

provided that ambient temperature and humidity do not exceed normal levels. For long-term storage, temperature should be lower than 40 temperatures cause no problem.

・After opening, protect the paper from strong light, to prevent discoloration.

Storing data

The recording paper uses a thermochemical reaction. Note the following points:

・To avoid discoloration, do not leave recording paper in direct sunlight. ・Store at not more than 40 and 90%RH. ・To keep definitive data, make photocopies of the recordings. ・Thermal paper will blacken when brought into contact with alcohol, ester,

ketone, or other volatile organic substances.

・If the thermal paper absorbs an organic solvent such as alcohols or ketones it

may no longer develop properly, and recorded information may fade. Soft PVC film and transparent contact adhesive tape contain such solvents, so avoid using them with recordings.

・Avoid interleaving the thermal recordings with damp diazo copies.

.Low

Direct sunlight Organic solvent

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2.9 Care of Recording Paper

Page 50

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2.10 Notes on Measurement

DANGER

Maximum input voltage ratings for the input unit and the input terminals of the unit are shown below. To avoid the risk of electric shock and damage to the unit, take care not to exceed these ratings.

The maximum rated voltage to earth of the input unit (voltage

The maximum rated voltage to earth rating applies also if an input

attenuator or similar is used. Ensure that voltage does not exceed these ratings.

When measuring power line voltages with the 8936 or 8938, always

connect the probe to the secondary side of the circuit breaker. Connection to the primary side involves the risk of electric shock and damage to the unit.

Input/output terminal Maximum input voltage Maximum rated voltage to earth

8936 (input) 400 VDC max. 370 VAC/DC

8937 (input) 30 Vrms or 60 VDC 30 Vrms or 60 VDC

8938 (input) 400 VDC max. 370 VAC/DC

8939 (input) 10 VDC max. 30 Vrms or 60 VDC

8940 (input) 30 Vrms or 60 VDC

(BNC/sensor connector terminal)

8946 (input) 30 Vrms or 60 VDC 30 Vrms or 60 VDC

8947 (input)

9322

EXT TRIG/ START STOP/ PRINT/ EXT SMPL

TRIG OUT/ GO/ NG

The maximum allowable charge that can be applied to the miniature connection terminals is 500 pC at the most sensitive of the six ranges, and 50,000 pC at the least

30 Vrms or 60 VDC (BNC terminal)

2000 VDC, 1000 VAC (CAT II) 600 VAC/DC (CAT III)

・

-5 to +10 VDC

-20 V to +30 VDC 500 mA max./ 200 mW max.

30 Vrms or 60 VDC (BNC terminal) Not insulated connector terminal)

30 Vrms or 60 VDC (BNC terminal)

When using grabber clips 1500 VAC/DC (CAT II) 600 VAC/DC (CAT III) When using alligator clips 1000 VAC/DC (CAT II) 600 VAC/DC (CAT III)

(

Not insulated

Sensor

In order to avoid accidents from electric shock, before removing or

replacing an input unit, check that the connector cables and thermocouple are disconnected, turn off the power, and remove the power cable.

Normally keep all two input units installed permanently. If a unit is

not fitted, it must be replaced by a blanking panel. If the unit is operated with an input unit not in place it poses a shock hazard.

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2.10 Notes on Measurement

Page 51

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CAUTION

NOTE

Before using the unit, make sure that the sheathing on the input cables is not damaged and that no bare wire is exposed. If there is damage, using the unit could cause electric shock. Replace with the specified 9197 or 9198 CONNECTION CORD. When making measurements on an AC power line for example, using a voltage transformer, be sure to connect the voltage transformer ground terminal to ground.

･ Strong wind striking the input terminal can disrupt the thermal balance of

the input circuit, resulting in incorrect readings. When taking measurements in windy environments, arrange the equipment to prevent wind from directly striking the input terminal of the 8937.

･ Abrupt changes on ambient temperature can also disrupt the thermal

balance of the input circuit. To prevent measurement error, allow the unit to adjust to the new temperature for about one hour before starting measurement.

Difference between "370 VAC/DC" and "400 VDC max." indication

370 VAC/DC: RMS value is displayed. 400 VDC max.: Instantaneous value is displayed.

The maximum input voltage (400 VDC max.) is defined as the superposition of DC component and AC peak, as shown in the figure below.

AC DC DC+AC

+400 VDC

-400 VDC

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2.10 Notes on Measurement

Page 52

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2.10.1 Maximum Input Voltage

8936 ANALOG UNIT, 8938 FFT ANALOG UNIT

■

8841/42

GND

8937 VOLTAGE/TEMP UNIT

■

8841/42

GND

8939 STRAIN UNIT

■

8841/42

GND

8940 F/V UNIT

■

8936 8938

8937 8946

8939

400 VDC max.

370 VAC/DC

30 Vrms or 60 VDC

10 VDC max.

30 Vrms or 60 VDC

370 VAC/DC

30 Vrms or 60 VDC

8841/42

GND

8947 CHARGE UNIT

■

8841/42

GND

8940

8947

Connector

BNC

Miniature connector

30 Vrms or 60 VDC

30 Vrms or 60 V

30 Vrms or 60 VDC

Maximum input load

30 Vrms or 60 VDC

Maximum input load

500 pC（High sensitivity: 6 range

50,000 pC（Low sensitivity: 6 ranges

Common

30 Vrms or 60 VDC

）

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2.10 Notes on Measurement

Page 53

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2.10.2 Using a Voltage Transformer

When making measurements on an AC power line for example, using a voltage transformer, be sure to connect the voltage transformer ground terminal to ground.

When the voltage transformer has a ground terminal

8841/42

GND terminal

8936

Ground

H L

Voltage transformer (PT) ground terminal

When the voltage transformer has no ground terminal

8841/42

GND terminal

8936

Ground

H L

Input

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2.10 Notes on Measurement

Page 54

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2.10 Notes on Measurement

Page 55

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Chapter 3

Basic Key Operation

3.1 Basic Key Operation

3.1.1 Basic Display Operation (MENU)

STATUS

CHAN

STATUS

CHAN

key

Displays the STATUS screen. Serves to switch pages of the STATUS screen. Serves to make main settings for various functions on the STATUS screen.

Displays the CHANNEL screen. Serves to set measurement range, position, etc. for input channels. Serves to switch pages of the CHANNEL screen.

DISP

SYSTEM

TRIG

FILE

key

SYSTEM

TRIG

key

FILE

key

3.1.2 Printer Key Operation

COPY

key

COPY

Displays the display screen. Serves to display and observe waveforms.

Displays the SYSTEM screen. Serves to switch pages of the SYSTEM screen. Serves to make common settings for all functions (clock setting, comment input, etc.) on the SYSTEM screen.

Displays the TRIGGER screen and serves to set trigger. Serves to switch pages of the trigger screen.

Displays the FILE screen. Serves to read and store waveform data on the FILE screen. See Chapter 14.

Serves to print out the waveform. Output destination by the See Section 12.5.2.

Produces a hard copy of the display content. Copy destination by the See Section 12.5.1.

COPY

key can be selected.

FEED

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

FEED

key

Forwards the paper while the key is held down.

3.1 Basic Key Operation

Page 56

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

3.1.3 Setting the Items

F1 F5

F1 to F5

(Function keys)

CURSOR

keys

The respective items are shown in the function key display. Select and set the items.

Serve to move the flashing cursor or use the key lock function.

3.1.4 Jog/Shuttle Controls and Select Key

Use the select key when the screen is in measurement display mode. Selected key lights LED.

VALUE

WAVE

A.B CSR

When the LED "VALUE" is lit and the following function keys are displayed, values and items may be set with the Jog/Shuttle control.

Entering the numerical values.

Waveform scrolling (See Section 11.1)

Movement of A･B cursors (See Section 11.2)

Increases in number.

Move the item selection cursor up in the selection window.

Decreases in number.

Increases in number, large step

Increases in number, small step

Decreases in number, small step

Decreases in number, large step

Move the item selection cursor down in the selection window.

Increases in number, 10-units

Increases in number, 1-units

Decreases in number, 1-units

Decreases in number, 10-units

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3.1 Basic Key Operation

Page 57

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3.1.5 Basic Input Operation

Set the basic settings for analog channels. See Chapter 9.

CH1 - CH16

RANGE

POSITION

TIME/DIV

knob

key

keys

Used to select channels and input values for connected input units In the DISPLAY or CHANNEL screen, these keys are used to select channels or set channels directly by means of the

POSITION

In the value input, these keys are used to set values.

Serves to set the measurement range for the channel selected by the channel select key.

Serves to set the zero position for the channel selected by the channel select key.

Serves to set the input signal capture speed.

and

RANGE

knobs.

3.1.6 Measurement Start and Stop Operation

LED: light during measurement

START

STOP

key

Press the to trigger standby.

Press the to stop the measurement.

START

STOP

key to initiate measurement or set the unit

key during measurement and trigger waiting

NOTE

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

The measurement start/stop operation is separately determined by each measurement function. For details, see "Start and Stop Operation," which explains each measurement function.

3.1 Basic Key Operation

Page 58

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3.2 Other Keys Operation

MANU

TRIG

CH.SET

LEVEL

MONI

VIEW

AUTO

HELP

MANU TRIG

Manual trigger

CH. SET

Channel settings

LEVEL MONI

VIEW

AUTO

HELP

key

When the unit is in trigger standby mode, pressing this key causes manual triggering. See Section 10.12.

Enables the measurement conditions for each channel on the display screen to be set or changed. Settings remain in effect even during startup. (Settings are not in effect during waveform parameter calculation setup.) The setup screen for "ch 1 to 16," or "logic A to D" can be selected on the channel and trigger screens. See Section 9.3.

Displays the level monitor. See Section 11.5.

Shows at the bottom of the screen the position with respect to the recording length of the displayed part of the waveform. Call up information about the status of memory block. See Section 11.6.

Automatically sets time axis range, measurement range, and zero position of the input waveforms with the memory recorder function. See Section 4.6.

An explanation of the display screen or the item currently selected by the cursor appears. Press the

key to bring up a Help window

HELP

containing explanatory information. Pressing any key exits help screen.

On-line Help

A brief explanation of the item currently selected by the flashing cursor is displayed by pressing the

HELP

key.

Press any key to cancel the help screen.

Press anyke

Press the

HELP

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3.2 Other Keys Operation

Page 59

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3.3 Screen Configuration

DISPLAY screen Channel setting screen

s34-1 s34-2

The input channel can be set. Press the

CH.SET

key to change

the input channel

s34-3 s34-4

DISP

settin

screen.

CH.SE

s34-5 s34-6 s34-7

SYSTE

STATU TRIG CHAN

Level monitor screen

The input level can be viewed and set.

LEVEL.

MONI

View screen

The waveform display position and block occupation status can be viewed.

VIEW

s34-8

SYSTEM screen

Each settings

STATUS screen

SYSTE STATU

Status

Scaling

Comment

Interface

Initialize

Self check

Memory segment

Parameter calculation

Waveform calculation

In Memory recorder function, these selection can be made by using the function keys on page 1/4.

TRIGGER screen CHANNEL screen

TRIG

Channels 1 - 16

Channels A - D

CH.SET

CHAN

Channels 1 - 8

Channels 9 - 16

Channels A - D

CH.SET

Channels 1 - 16

Variable function

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3.3 Screen Configuration

Page 60

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3.3 Screen Configuration

Page 61

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Chapter 4

Memory Recorder Function

4.1 Overview of the Memory Recorder Function

The memory recorder function has the following features.

(1) After being stored in the internal memory, input signal data can be displayed

and printed.

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

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

(3) Time axis setting

100 μs/DIV to 5 min/DIV

(4) Time axis resolution 100 points/DIV

(5) Storage capacity

Number of channels 16 8 4 2

8 M words (DIV)

32 M words (DIV)

(6) Waveform magnification/compression display and print

・Time axis direction ×10 to ×1/10000 (16 steps) ・Voltage axis direction ×10 to×1/2 (single),×5to×1/4 (2 to 8, X-Y single,

dual screens) 5 steps

・With the variable function, vernier function, zoom function

(7) Display format

・Time axis waveform: single, dual, quad, oct screen display (LCD), hex

screen display (when printing)

・X-Y waveform: single, dual screen display (dot, line)

(8) Printing

・Auto print, Manual print, Partial print, Report print, Screen hard copy. ・Multiple printing possible.

(9) High-quality print

Smooth print function approximates analog waveform.

5000

20000

10000 40000

20000 80000

40000

160000

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4.1 Overview of the Memory Recorder Function

Page 62

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(10) Logging function

Numeric printout of waveform data

(11) Memory segmentation function

・Helps to reduce dead time of continuous recording. (Sequential save

function)

・Memory is divided into blocks which can freely selected by the user for

storing measurement data. (Multi-block function)

(12) Processing function

・Waveform processing (arithmetic processing, differential processing etc.) ・Waveform parameter processing (frequency measurement, rms measurement

etc.)

(13) Averaging

This makes it possible to eliminate noise and irregular signal components.

(14) Waveform evaluation function detects abnormal waveforms.

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4.1 Overview of the Memory Recorder Function

Page 63

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4.2 Operation Sequence (MEM)

Preparation

See Chapter 2

Basic Settings

Settings on the STATUS1 screen

See

Section 4.3

Press the the STATUS screen.

STATUS

key to display

Installation of the Unit

Turn on the power

Connect the inputs

Function

Time axis range

Recording length

Display format

Interpolation

Print mode (Waveform/ Numeric print)

Roll mode

Select the memory recorder function.

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

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

Select the format type for the waveform display screen.

Interpolation can be set when set the X-Y graph format.

Select the format, waveform, or numerical value should be used to output measured data and calculation results.

Select whether or not to display the waveform at the same time as it is captured.

s-42-1

Advanced Settings

(Use this function, if necessary.)

Settings on the STATUS2 screen

Auto print function

Auto save function

Overlay function

Averaging count

Waveform evaluation

Memory segmentation

See Chapter 15

Set the waveform calculation

See Chapter 16

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

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

Select whether or not to overlay.

Set the averaging type and count.

Set the waveform evaluation mode

Set the GO/NG stop mode

Sequential save function

Multi-block function

Parameter calculation

Waveform processing calculation

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4.2 Operation Sequence (MEM)

Page 64

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Setting the input channel

Settings on the channel screen

Settings on the variable screen

Settings the advanced function

Setting the trigger function

(See Chapter 10)

(See Chapter 9)

Waveform display color Waveform display graph Voltage axis range Input coupling Logic input Magnification/compression along voltage Zero position Zero adjustment Offset cancel Low-pass filter

Variable function (See Chapter 9.7)

Scalingfunction(SeeChapter9.8) Comment function (See Chapter 9.9) Vernier function (See Chapter 9.10.2)

Trigger mode Trigger source Pre-trigger Trigger selection

Start measurement

・ Press the ・ When the trigger conditions are met, measurement start. ・ Press the

Processing measurement data

Measurements on display screen

Stop measurement

Setting the system

Press the SYSTEM screen. (See Chapter 12)

SYSTEM

key to display the

START

STOP

key and the LED lights.

key and the LED goes out after measurement has finished.

Printing the measurement data (See Chapter 13) Saving the measurement data (See Chapter 14)

Waveform scrolling (See Section 11.1)

Using the A･B cursor (See Section 11.2)

Magnification/compression ratio along time axis

(See Section 11.3)

Zoom function (See Section 11.4)

Set up (See Section 12.2) Scaling (See Section 12.3) Comment (See Section 12.4) Interface (See Section 12.5) Initialize (See Section 12.6) Self-check (See Section 12.7)

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4.2 Operation Sequence (MEM)

Page 65

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4.3 STATUS Settings (MEM)

s43-1

Press the how to set the STATUS screen of the memory recorder function. See the corresponding sections for items that can be set in the Waveform display or CHANNEL screens. Waveform display screen: See Section 4.5 CHANNEL screen: See Section 9.3

STATUS

key to access the STATUS1 screen. This section explains

See Sections

4.3.1　

4.3.2

4.3.3

4.3.4

4.3.5

4.3.6

4.3.7

4.3.8

4.3.9

NOTE

4.3.10

4.3.11

4.3.12

The settings in Section 4.3.5 are displayed only when the display format has been set to "X-Y."

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4.3 STATUS Settings (MEM)

Page 66

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4.3.1 Setting the Function Mode

The 8841/42 has five function modes. Select the Memory recorder function.

Procedure

Screen: STATUS1, CHANNEL, TRIGGER, Waveform display

1. Use the Menu keys to display the desired screen.

2. Move the flashing cursor to the top position.

3. Select the

Function

display

MEMORY

Meaning

Memory recorder function

Recorder function

RMS recorder function

Recorder & Memory recorder function

FFT function

function key display.

4.3.2 Setting the Time Axis Range

Set the speed for inputting and storing the waveform of the input signal. Time axis range setting expresses the time for 1 division. The sampling period is 1/100th of the set value for the time axis range. (100 samples/DIV)

Procedure1

Screen: STATUS1, Waveform display

1. Use the Menu keys to display the desired screen.

2. Move the flashing cursor to the

3. Use the Jog/Shuttle control, the function keys or the the selection. When "EXT." is selected, the external sampling can be used. For details, see Section 17.1.4.

Data points per division are set when external sampling is selected.

1. Move the flashing cursor to the the left.

2. Use the

JOG/SHUTTLE

Setting range is 10 to 1000.

Procedure 2

Using the TIME/DIV key

1. Use the Menu keys to display the desired screen.

2. Use the The

TIME/DIV

located.

NOTE

The symbol "*" in the selection window indicates the time axis of the data stored to current memory. (If no data is present in memory, this symbol is not displayed.)

time/DIV

samples/DIV

item.

TIME/DIV

key to make

item, as shown in the figure on

control or the function keys to make the selection.

key to make the selection.

key can be used regardless of where the flashing cursor is

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4.3.3 Setting the Recording Length

The length of recording for one measurement operation (number of DIV) can be set.

SELECT Select the recording length. ARBITRARY Variable recording length can be selected by the user.

Screen: STATUS1, Waveform display

Procedure 1 Constant recording length mode

1. Use the Menu keys to display the desired screen.

2. Move the flashing cursor to the

3. Use the Jog/Shuttle control or the function keys to make a setting.

Function

display

Meaning

Move the cursor up in the selection window.

Move the cursor down in the selection window.

item and select

shot

Procedure 2 Variable recording length mode

1. Use the Menu keys to display the desired screen.

2. Move the flashing cursor to the

3. Use the Jog/Shuttle control or the function keys to make a setting. To change the column, use the cursor keys ( ).

Function

display

Meaning

item and select

shot

SELECT

ARBITRARY

NOTE

Increases in number.

Decreases in number.

･ Depending on the number of channels, the recording length is limited.

(For setting the number of channels, see Section 12.2.1.)

･ If the recording length is changed during measurement, measurement is

restarted using the newly set recording length.

･ In fixed-length recording mode, the symbol "*" in the selection window

indicates the recording length of the data stored to current memory. (If no data is present in memory, this symbol is not displayed.) In any recordinglength mode, the symbol "#" is displayed before the recording length.

The relation between number of channels and maximum recording length

Memory capacity

(words)

32 M

16 channels 8 channels 4 channels 2 channels

5000

20000

Maximum recording length (DIV)

10000 40000

20000 80000

40000

160000

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4.3.4 Setting the Display Layout

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

recording them on the printer.

・The following layout is available: single, dual, quad, oct (Waveform display

screen), hex (print only, oct graph on Waveform display screen) X-Y single, X-Y dual (dot/line).

・The voltage per division is automatically changed according to the display

format.

Procedure

Screen: STATUS1

1. Press the

STATUS

2. Move the flashing cursor to the

key to display the STATUS1 screen.

format

item.

3. Use the function keys to select the display format.

4. Set the graph type when the display format is set to Dual, Quad, Oct or Hex screen display. For the setting of the X-Y screen, refer to Section 4.4.

5. Press the

CHAN

key to display the CHANNEL screen.

6. Move the flashing cursor to the point in the figure below. The figure shows the setting for the channel 1 (CH1). Setting for the channel 2 to 16 should be made in the same way.

Flashing cursor

7. Use the function keys to select.

Function

display

Meaning

Move the cursor up in the selection window.

Move the cursor down in the selection window.

In the cases of HEX, as far as the printer recording output is concerned, the waveforms for each channel are automatically distributed on each graph according to the table below:

Graph

1 2 3 4 5 6 7 8

Analog

channel

CH 1

CH 2

CH 3

CH14

CH15

CH16

CH17

CH18

Graph

9 10 11 12 13 14 15 16

Analog

channel

CH19

CH 10

CH 11

CH 12

CH 13

CH 14

CH 15

CH 16

For details on logic channels, refer to Section 9.3.8.

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Single graph

Display and record as one graph. (At the most, 16 analog + 16 logic signals)

s434-2, 3, 4, 5, 6, 7

Dual graph

Display and record as two

･

graphs. (At the most, 16 analog +16logicsignals) Specify which input channel to

･

use for waveform graph display and recording.

Quad graph

Display and record as four

･

graphs. (At the most, 16 analog + 8 logic signals)

Specify which input channel to

･

use for waveform graph display and recording.

Oct graph

Record as eight graphs. (At the

･

most, 16 analog + 4 logic signals)

Specify which input channel to

･

use for waveform graph display and recording.

X-Y single graph (dot)

X-Y dual graph (line)

HEX graph

Display is same as Oct screen display.

･

Record as sixteen graphs. (At the most, 1 analog + 2 logic signals)

･

Channel positions are automatically distributed.

･

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4.3.5 Setting the Interpolation (dot-line)

・Interpolation can be set when set the X-Y graph format. ・This setting determines whether the input waveform (sampling data) is to be

displayed and printed as a series of dots or a line using linear interpolation.

Procedure

Screen: STATUS1

1. Press the

STATUS

key to display the STATUS1 screen.

2. Move the flashing cursor to the dot-line item.

3. Use the function keys to make a setting.

Function

display

Meaning

Linear interpolation is not performed.

Linear interpolation is performed.

4.3.6 Setting the Print Mode

Select the format, waveform, or numerical value should be used to output measured data and calculation results.

Waveform

Numerical value The data spacing interval also must be set.

The smooth print function can be used, but print speed will

decrease.

Procedure

(1) Setting the printer format

(2) Setting the smooth printing and print interval

Screen: STATUS1

1. Press the

STATUS

2. Move the flashing cursor to the

key to display the STATUS1 screen.

print mode

item.

3. Use the function keys to make a setting.

Function

display

Meaning

Measurement data and the result of calculation

are printed as a waveform.

Measurement data and the result of calculation

are printed as numeric data.

1. When the waveform format is selected, determine whether to use the smooth printing or not. When the numerical value is selected, set the print interval. (unit: divisions)

2. Move the flashing cursor to

smooth printorinterval

3. Use the function keys to make a setting.

Since 1 division represents 100 samples, the print interval "0.01" refers to a printout of every sample (no print interval). If the set print interval exceeds recording length, only the first point is printed.

NOTE

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4.3 STATUS Settings (MEM)

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4.3.7 Setting the Roll Mode

・This mode can be used at a time axis range setting of 10 ms/DIV or slower. ・In normal recording, the waveform is displayed only after all data of the

recording length have been captured. At low sampling speed settings, this will cause a considerable delay between the start of measurement and the appearance of the waveform on the display.

・When roll mode is set to ON, the waveform is displayed immediately at the

start of recording (the screen scrolls).

・When the time axis range of 10 ms/DIV or faster is set, normal recording is

carried out even if roll mode is set to ON.

Procedure

Screen: STATUS1

1. Press the

STATUS

key to display the STATUS1 screen.

2. Move the flashing cursor to the

roll mode

3. Use the function keys to make a setting.

Function

NOTE

display

･ Roll mode cannot be set together with the external sampling.

Meaning

Normal recording is carried out.

The waveform is displayed immediately at the

start of recording.

･ When Roll Mode is set to ON, the settings for Overlay, Averaging,

Sequential Saving, Calculating Waveform data, and Waveform evaluation are automatically turned OFF. (When the display format is set to "X-Y," you can turn ON Overlay with Roll Mode ON.)

4.3.8 Setting the Auto Print Function

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

item.

Procedure

Screen: STATUS1

1. Press the

STATUS

key to display the STATUS1 screen.

2. Move the flashing cursor to the

auto print

item.

3. Use the function keys to make a setting.

Function

NOTE

display

･ When cursor A and B are enabled, partial printing is executed.

Meaning

Auto print is disabled.

Automatically printed to the internal printer.

A LAN is used to transfer printing images to the

9333 LAN COMMUNICATOR.

･ When the roll mode is enabled and the time-axis range is lower than 10

ms/DIV, data is displayed and printed simultaneously.

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4.3.9 Setting the Auto Save Function

When the function is enabled, measurement data are automatically stored on a floppy disk, PC card, MO disk or connected SCSI device after they are captured. The Auto Save function stores a file in the directory currently selected on the file screen. See Section 14.12.2.

Procedure

Screen: STATUS1

1. Press the

STATUS

2. Move the flashing cursor to the

key to display the STATUS1 screen.

auto save

item.

3. Use the function keys, select the media for auto saving.

Function

display

Meaning

Auto save is disabled.

Automatically stored on floppy disk

Automatically stored on PC card.

Automatically stored on connected SCSI device.

Automatically stored on MO disk.

(When using a LAN card)

A LAN is used to transfer data to the 9333 LAN COMMUNICATOR.

4. When Media is selected, the Storage method item appears.

Function

display

Meaning

When the media becomes full, automatic storage stops.

When the media becomes full, old files are deleted to make room for automatic storage. With the binary format selected, the file with the extension 'MEM' is

deleted, and if sequential save is selected, files with the extension 'SEQ' are also deleted. With the text format selected, files with the extension 'TXT' are deleted.

5. Move the flashing cursor to

Function

display

Meaning

Data are stored as binary data.

Dataarestoredastextdata.

, and select the format.

type

Data stored in the text format is not readable by the 8841/42.

6. When the data format to be saved is set to text data, the intermittent setting item is displayed. Use the function keys or Jog/Shuttle control to make a setting.

Function

display

Meaning

Move the cursor up in the selection window.

Move the cursor down in the selection window.

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7. Set the file name. For the input method, refer to Section 9.9.3. When using auto-save, a number is appended to the name you specify as the file name. This then becomes the file name. If you start procedures before specifying a file name, AUTO is automatically enabled.

File names cannot contain the characters +, -, ], or [. Please note that file names containing these characters will not be saved.

NOTE

･ File names consist of 8 characters (or 4 double-byte characters). With auto-

save, since numbers are attached to the end of file names, long file names are truncated when this number is appended to the end of the file name.

･ When auto-save is enabled, the storage channel cannot be selected. Data for

the channel for which the waveform is displayed is saved.

･ When both auto-print and auto-save are enabled, auto-save usually takes

precedence. However, if roll mode is enabled, auto-print will execute first.

･ For details on connected SCSI device, refer to Section 14.4. ･ When cursor A and B are enabled, partial saving is executed. ･ During automatic storage, if the

STOP

key is pressed twice to interrupt measurement, waveforms taken prior to the interruption are stored automatically.

･ The directory and the number of files that can be stored in the directory are

limited. For details, see Section 14.7.

･ When "COMMUNI" (communications) is selected as Media, Storage Method

and Type are not displayed.

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4.3.10 Setting the Overlay Function

・Overlay is performed without clearing the currently displayed waveform (if

trigger mode is REPEAT or AUTO). This allows comparison to the immediately preceding waveform.

・If trigger mode is SINGLE, measurement terminates after one set of data has

been collected. Therefore the overlay setting is invalid.

Procedure

s4310-1, 2

Screen: STATUS1

1. Press the

STATUS

2. Move the flashing cursor to the

key to display the STATUS1 screen.

overlay

3. Use the function keys to make a setting.

Function

display

Meaning

Overlay is not performed.

Overlay is performed.

item.

NOTE

Normal Display

･ While overlay is being executed, operations on the display screen (waveform

Overlaid Display

scrolling, change in time-axis magnification/compression ratio, change in zero position, and jumping to another display screen using VIEW function (see Section 11.6)) are disabled.

･ When manual printing or trace cursor reading carried out, only the last

waveform will be done.

･ Use Report Print to print overlaid waveforms. (See Section 13.6.7, "Report

Print.")

･ If one of the following settings is changed, the overlay waveform display

terminates and only the last waveform is shown:

① STATUS1: Display format ② CHANNEL: Input settings

･ The overlay function cannot be set together with roll mode.

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4.3.11 Setting the Averaging Function

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

determining the average.

・This makes it possible to eliminate noise and irregular signal components. ・The higher the number of averaging instances, the more effectively will noise

be suppressed.

Procedure

s4311-1, 2

Screen: STATUS1

1. Press the

STATUS

2. Move the flashing cursor to the

key to display the STATUS1 screen.

averaging

item.

3. Use the function keys or Jog/Shuttle control to make a setting.

Function

display

Meaning

Move the cursor up in the selection window.

Move the cursor down in the selection window.

After starting the measurement, the averaging count and the current waveform data count are shown on the screen.

After Averaging

NOTE

Before Averaging

･ When the averaging function is used, logic waveform is not displayed. ･ When the memory segmentation function is used, averaging is not available. ･ Averaging and waveform processing cannot be carried out simultaneously. ･ The averaged waveform becomes available for waveform processing when

the averaging setting is turned OFF following measurement.

･ When the averaging function is used, the maximum recording length is

reduced to 25% of the normal value.

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Averaging and trigger mode

(1) Trigger mode: SINGLE

1. After the

START

key was pressed, data are captured whenever the trigger

conditions are fulfilled, and summing averaging is carried out.

2. When the specified number of data has been captured, measurement stops automatically.

3. If the measurement was stopped prematurely with the

STOP

key, the

averaging result up to that point is displayed.

Waveform averaging count = specified number

Input

Trigger conditions

fulfilled

Waveform capture

Averaging

(summing)

Display End

(for recording length)

Waveform averaging count = less than specified number

(2) Trigger mode: REPEAT

1. After the

START

key was pressed, data are captured whenever the trigger conditions are fulfilled, and summing averaging is carried out until the specified averaging count. The averaging result is shown on the display.

2. After the specified averaging count was reached, exponential averaging is carried out whenever data are captured, and the averaging result is shown on the display.

3. If the measurement was stopped prematurely with the

STOP

key, the

averaging result up to that point is displayed.

The STOP key is pressed

Trigger conditions

fulfilled

Waveform capture

(for recording length)

After specified count

Averaging

(summing)

Averaging

(exponential)

Display End

(3) Trigger mode: AUTO

When the

START

key is pressed, data are captured even if trigger conditions are not fulfilled after a certain interval. If averaging is applied to unsynchronized input signals, the result will be meaningless.

NOTE

For details on summing averaging and exponential averaging, refer to Appendix 3.6.

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4.3.12 Setting the Waveform Evaluation

･ Display format can be set on single screen or X-Y single screen. ･ GO (pass) or NG (fail) evaluation of the input signal waveform can be

performed using an evaluation area specified by the user. This can serve to detect irregular waveforms. After the evaluation result is generated, signals are output from the GO/NG terminal. All the channels being displayed are evaluated.

NOTE

･ When a waveform evaluation area is created by the memory recorder

function, the waveform evaluation area created by the FFT function is cleared.

･ For details on the waveform evaluation, refer to Section 16.3.

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4.4 Using the X-Y Waveform Plots (MEM)

・Setting the display format to X-Y in status screen allows X-Y waveforms to

be combined. Any of channels 1 to 16 can be selected for each of the X and Y axis. Up to four X-Y plots can be made simultaneously.

・Voltage axis magnification/compression is active also when using X-Y

combined plotting.

・Using the A･B cursors, it is possible to specify the data between the cursors

for partial plotting.

#s434- 6, 7copy# s44-1, 2

X-Y Single

A single plot is displayed and recorded. X-Y waveforms of graphs 1 to 4 are displayed in one screen.

X-Y Dual

Two single plot is displayed and recorded. X-Y waveforms of graphs 1 and 3 are displayed in the upper section, and those of graphs 2 and 4 are displayed in the lower section.

X-Y（dot）

The sampled data is displayed and

･

recorded just as it comes.

Linear interpolation is not performed.

･

X-Y（line）

Linear interpolation is performed.

･

The display becomes easier to read, but

･

display speed is slower compared to dot display.

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Procedure

s44-3

Screen: STATUS1

1. Press the

STATUS

key to display the STATUS1 screen.

2. Move the flashing cursor to the format item.

3. Use the function keys to select the

X-Y single or X-Y dual format.

4. Set the interpolation. (See Section 4.3.5)

5. Press the

6. Press the

CHAN

CH.SET

key to display the CHANNEL screen.

key to display page 3/3.

7. Move the flashing cursor to desired channel, and use the function keys to set the waveform color (including displays waveform ON/OFF).

Function

display

Meaning

Move the cursor up in the selection window.

Move the cursor down in the selection window.

Waveform is performed.

Procedure

Waveform is not performed.

8. Specify the X-axis channel. Move the cursor to the channel to be used as X axis. And use the function keys or the Jog/Shuttle control to select X axis.

9. Specify the Y-axis channel. This is done in the same way as the X-axis setting.

10. For graph 2 to graph 4, the settings are made in an identical.

Partial X-Y plot

Using the A･B cursors, it is possible to specify a range for partial X-Y

plotting. (Normal X-Y plotting covers all data of the recording length.)

Screen: Waveform display (excluding X-Ysingle and X-Ydual)

1. Display the captured waveform data, using a format other than X-Ysingle and X-Ydual.

2. Use the A･B cursors to specify the desired portion for plotting (see Section

11.2).

3. Press the STATUS

key to display the STATUS1 screen.

4. Carry out combined plotting as described above.

In partial X-Y plot, the screen displays the period of time passed after the completion of the trigger specified using the cursors A and B.

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Switching the X-Y1 Screen Display (Wide Display)

Setting the display format to X-Y1 in the STATUS1 screen allows you to switch between wide screen display and normal screen display each time

DISP

you press the

key.

Normal Display Screen Wide Display Screen

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4.5 Settings on the Waveform Display Screen (MEM)

Explains the setting items on the Waveform display screen. For details on setting, refer to Section 4.3. When want to use the Jog/Shuttle control, press the selection window is not displayed.)

Setting items Selection Explanation

1. Function

MEM, REC, RMS, REC&MEM, FFT

VALUE select key.

Select function.

（

The

2. Trigger mode

3. Analog trigger

4. Pre-trigger

Time Axis Range

6. Magnification/

compression along

the time axis

7. Zoom function

8. Recording Length

SINGLE, REPEAT, AUTO

OFF, LEVEL, OUT, IN, V-DROP, CYCLE

0 to 100%, -95%

100μs/DIV to 5

min/DIV, EXT

×10 to ×1/10000

Changes in the magnification in the

range of ×1/5000 to ×

SELECT: 25 DIV to 5000 DIV ARBITRARY: 1 DIV to 5000 DIV

Select trigger mode.

Set the analog trigger.

Set the Pre-trigger.

Set the speed for inputting and storing the waveform of the input signal. Time axis range setting expresses the time for 1 DIV.

By magnifying the waveform, detailed observations can be made. By compressing the waveform, an entire change can be promptly apprehended.

Splits the Waveform display screen into two halves, upper and lower screens, expanding the waveform in the upper screen along the time axis and displaying the expanded waveform in the lower screen.

Using channels: 16 ch Capacity: 8 M words The length of recording for one measurement operation (the number of DIV) can be set.

9. Cursor Measurement

Input channel settings

OFF, , , ＋

Analog input Logic input X, Y axis (X-Y format)

The A･B cursors can be used.

Enables the measurement conditions for each channel on the display screen to be set or changed. See Section 9.10.

Input level monitor function

VIEW function

Press the LEVEL MONI key. See Section 11.5.

Press the VIEW key. See Section 11.6.

Channels that may be changed with the RANGE and

POSITION

knob (zero position).This channel display is selected with

knob (measurement range)

channel-select keys CH1 to CH16. Changing the set channel in the CHANNEL or CH.SET screens modifies the setting accordingly.

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4.6 Auto Range Function

This function automatically selects the time axis range, measurement range and zero position. Taking the lowest numbered channel among the channels for which waveform display is on, 1 to 2.5 cycles are automatically set to be recorded as 15 divisions.

Procedure

Screen: Waveform display

1. Press the

2. Press the

key to display the Waveform display screen.

DISP

AUTO

key.

3. Use the function keys to make a setting.

Function

display

Meaning

Execute the Auto Range function.

Cancel the Auto Range function.

If measurement has started using the auto-range function:

・ Conditions related to the input units （all channel）

Voltage axis range, zero position

Magnification/compression ratio along the voltage axis

Low-pass filter, Input coupling

Value set automatically

Single screen:×1 Other screens:×1/2

OFF, DC

・ Trigger conditions （one channel only）

Trigger mode

AND/OR for internal trigger and external trigger

Pre-trigger

Internal trigger

Trigger type : Level

・ Status conditions

Time axis range (time/div)

Memory segmentation

AUTO

20%

Enables only the waveform display channel with the lowest number. (If the difference between maximum and minimum is 2 divisions or less, the next channel is enabled.)

Slope:

rising Trigger level: value set automatically Filter: OFF

Value set automatically Magnification/compression ratio:×1

OFF

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NOTE

･ Because the auto-range function performs automatic setting for the input

signal present at the time the function is executed, input a signal before executing the function.

･ If for the input signal for this channel there is only a small difference

between the maximum value and the minimum value in the range of highest sensitivity (5 mV/DIV), the setting is made by taking the next higher channel.

･ If the range cannot be determined, for all channels for which the waveform

display is on. A warning message appears, and measurement is abandoned.

･ When the auto range function is activated by pressing the

AUTO

key, a trigger output signal is generated. This should be taken into consideration when using both the trigger output and the auto range function.

･ The auto-range function does not operate on channels for which the

CHARGE or PREAMP measurement mode is selected on the 8947 CHARGE UNIT.

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4.7 Other Screen Settings

The status screen for the memory recorder function contains three more setup screens. For detailed setup procedures, see the associated sections.

STATUS2 screen: Memory Segmentation Screen (See Chapter 15) STATUS3 screen: Parameter Calculation Screen (See Section 16.1) STATUS4 screen: Calculating Waveform Data Screen (See Section 16.2)

s47-1, 2, 3, 4

STATUS 1 Screen

STATUS 3 Screen

STATUS 2 Screen

STATUS 4 Screen

NOTE

The STATUS screen can also be changed from the function display field "1/4" on the upper right of the STATUS screen.

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4.8 Start and Stop Operation (MEM)

Setting the 8841/42

STATUS Settings Channel Settings Trigger Settings

Measurement start

Trigger condition

are met

Recording start

See Section 4.3, "STATUS Settings", Chapter 9, "Input Channel Settings", Chapter 10, "Trigger Functions."

Press the

START

key and LED light. When the pre-trigger is set, the trigger will not be registered for a certain period after the start of measurement. (During this interval, "Pre-trigger standby" is shown on the display.) When the trigger can be registered, the indication "Waiting for trigger" is shown on the display.

Data recording starts when trigger condition are met. When trigger mode selected AUTO, unit waits for about 1 second for trigger conditions to be met. After this interval, data recording starts, regardless of trigger state.

Displays "Storing". When roll mode is set to ON, the waveform is displayed (scrolling) immediately at the start of recording Using the

VIEW

key to display the time (from measurement started time). When the

STOP

key is pressed twice during measurement, the

8841/42 is forcibly stopped. Then the waveform data until the

STOP

key is pressed is displayed and saved. When the auto saving is set to ON, the data until a forced termination is automatically saved. (Auto printout is not executed.)

Recording end

Waveform displays after data corresponding to recording length have been stored in memory. Auto printout and auto save are executed.

Measurement end

Trigger mode SINGLE

REPEAT AUTO

End of measurement

Each time when trigger conditions are met, data are recorded and memory contents are overwritten.

End of measurement in REPEAT and AUTO trigger modes When the 8841/42 acquires measurement data in an amount corresponding to the set recording length, and the measurement is stopped. (Waveform display, auto printout, and auto save are executed.)

When the time axis range is set to the slow range (not more than 10 ms/DIV), the waveforms measured until the pressed are displayed.

When the time axis range is set to the fast range (greater than 10 ms/DIV), waveforms are not displayed. (Waveforms are displayed only if measured data having recording length equal to the previous setting exist.)

STOP

key is pressed once during measurement, the

STOP

key is

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Chapter 5

Recorder Function

5.1 Overview of the Recorder Function

The recorder function has the following features.

(1) Real time display and printing of the input signal

(2) Real time continuous recording of the input signal

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

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

(4) Time axis setting

20 ms/DIV to 1 h/DIV

(5) Time axis resolution 100 points/DIV (printer)

(6) Sampling period

1, 10, 100μs, 1, 10, 100 ms（Can be selected, from 1/100 of the time axis setting）

(7) Memory capacity

・8 M words: 2000 DIV ・32 M words: 10000 DIV ・Arbitrarily (Set from 1 division to the maximum number of divisions at 1-

division intervals)

(8) Waveform magnification/compression display and printout

・Time axis direction: ×1to×1/500 ・Voltage axis direction: ×10 to ×1/2 (single)

×5to×1/4 (dual to hex, X-Y single/dual) 5 steps

・With the variable function, vernier function

(9) Display format

・Time axis waveform: single, dual, quad, oct screen display (LCD), hex

screen display（printer only）

・X-Y waveform: single, dual

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(10) Scrollable display

・The most recent 2000 (32 M words: 10000) divisions of the data are stored

in memory.

・It is possible to scroll back for easy review.

(11) Additional recording function

・The first set of measurement data is preserved, and recording of the second

set of measurement data starts after the first set.

(12) Logging function

Numeric printout of waveform data.

(13) Reprint function

The most recent 2000 (32 M words: 10000) divisions of the data stored in memory can be printed as many times as required.

(14) Print

Real-time print, manual print, partial print, report print, screen hard copy can be printed.

(15) X-Y CONT Recorder

This function allows X-Y plot between channels in real time.

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5.2 Operation Sequence (REC)

Preparation

See Chapter 2

Basic Settings

Settings on the STATUS screen

See

Section 5.3

Press the the STATUS screen.

STATUS

key to display

Installation of the Unit

Turn on the power

Connect the inputs

Function

Time axis range

Sampling period

Recording length

Display format

Print mode

Additional recording

Print function

Select the recorder function.

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

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

Select the format type for the waveform display screen.

Select the waveform or numerical value to be output the measured data Set the print interval (numerical format)

Set whether additional recording is required.

Select whether or not to print out simultaneously with screen display.

Auto save function

Interpolation

Waveform clear

Select whether or not to save the waveform automatically

Select dot or line in X-Y display format.

Select whether or not to clear waveform in X-Y display format.

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Setting the input channel

Settings on the channel screen

Settings on the variable screen

Settings the advanced function

Setting the trigger function

(See Chapter 10)

(See Chapter 9)

Waveform display color Waveform display graph Voltage axis range Input coupling Logic input Magnification/compression along voltage Zero position Zero adjustment Offset cancel Low-pass filter

Variable function (See Chapter 9.7)

Scaling function (See Chapter 9.8) Comment function (See Chapter 9.9) Vernier function (See Chapter 9.10.2)

Trigger mode Trigger source Trigger timing Trigger selection

Start measurement

・ Press the ・

When the trigger conditions are met, measurement start.

・ Press the STOP

Processing measurement data

Measurements on display screen

Stop measurement

Setting the system

Press the SYSTEM screen. (See Chapter 12)

SYSTEM

key to display the

START

key and the LED lights.

key and the LED goes out after measurement has finished.

Printing the measurement data (See Chapter 13) Saving the measurement data (See Chapter 14)

Waveform scrolling (See Section 11.1) Using the A/B cursor (See Section 11.2) Magnification/compression ratio along time axis

(See Section 11.3)

Set up (See Section 12.2) Scaling (See Section 12.3) Comment (See Section 12.4) Interface (See Section 12.5) Initialize (See Section 12.6) Self-check (See Section 12.7)

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5.3 STATUS Settings (REC)

Press the how to set the STATUS screen of the recorder function. See the corresponding sections for items that can be set in the Waveform display or CHANNEL screens. Waveform display screen: see Section 5.5 CHANNEL screen: see Section 9.3

STATUS

key to access the STATUS screen. This section explains

See Sections

5.3.1

5.3.2

5.3.3

5.3.4

5.3.5

5.3.10 (when format:X-Y)

5.3.6

5.3.7

5.3.8

5.3.9

NOTE

5.3.11 (when format:X-Y)

The settings in Section 5.3.10 and 5.3.11 are displayed only when the display format has been set to "X-Y."

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5.3.1 Setting the Function Mode

The 8841/42 has five function modes. Select the Recorder function.

Procedure

Screen: STATUS, CHANNEL, Waveform display, TRIGGER

1. Use the Menu keys to display the desired screen.

2. Move the flashing cursor to the top position.

3. Select the RECORDER function key display.

Function

display Meaning

Memory recorder function

Recorder function

RMS recorder function

Recorder & Memory recorder function

FFT function

5.3.2 Setting the Time Axis Range

Set the speed for inputting and storing the waveform of the input signal. Time axis range setting expresses the time for 1 division.

Screen: STATUS, Waveform display

Procedure 1 1. Use the Menu keys to display the desired screen.

2. Move the flashing cursor to the time/DIV item.

3. Use the Jog/Shuttle control, the function keys or the TIME/DIV the selection.

Procedure 2

Using the TIME/DIV key

1. Use the Menu keys to display the desired screen.

2. Use the TIME/DIV key to make the selection. The TIME/DIV

key can be used regardless of where the flashing cursor is

located.

NOTE

While the printer always outputs the data at the measurement magnification in recording mode, the waveform on the screen is reduced in size at the ratio shown in the table below, depending on the time-axis range.

50 ms/DIV

→×

1/2, 20 ms/DIV

→×

1/10 The symbol "*" in the selection window indicates the time axis of the data stored to current memory. (If no data is present in memory, this symbol is not displayed.)

key to make

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5.3.3 Setting the Sampling Period

The available range depends on the selected time axis range (input signal waveform capture rate).

Procedure

NOTE

Screen: STATUS

1. Use the Menu keys to display the desired screen.

2. Move the flashing cursor to the sampling item.

3. Use the Jog/Shuttle control or the function keys to make the selection.

Function

display

When a short sampling period is set and the input waveform changes slightly, a sudden disturbance such as noise will increase the difference the between the maximum and minimum values. To eliminate this phenomenon, set a long sampling period. For details, see Appendix 3.4.

Meaning

Increases in number.

Decreases in number.

5.3.4 Setting the Recording Length

The length of recording for one measurement operation (number of DIV) can be set.

SELECT ARBITRARY

Select the recording length.

Variable recording length can be selected by the user.

Screen: STATUS, Waveform display

Procedure 1 Constant recording length mode

1. Use the Menu keys to display the desired screen.

2. Move the flashing cursor to the

3. Use the Jog/Shuttle control or the function keys to make a setting.

Function

display

Meaning

Move the cursor up in the selection window.

Move the cursor down in the selection window.

shot item and select SELECT.

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Procedure 2 Variable recording length mode

1. Use the Menu keys to display the desired screen.

2. Move the flashing cursor to the

shot

item and select

ARBITRARY

3. Use the Jog/Shuttle control or the function keys to make a setting. To change the column, use the cursor keys ( ).

NOTE

Function

display

･

When the recording length is set to CONT.

Meaning

Increases in number.

Decreases in number.

ms/DIV, the printer setting (real-time print) is automatically set to OFF.

･

When the recording length is set to to OFF.

･

The maximum recording length is 2000 DIV when the memory capacity is 8 M words, and 10000 DIV when the memory capacity is 32 M words (when memory extended)

･

In fixed-length recording mode, the symbol "*" in the selection window indicates the recording length of the data stored to current memory. (If no data is present in memory, this symbol is not displayed.) In any recordinglength mode, the symbol "#" is displayed before the recording length.

5.3.5 Setting the Display Layout

in a range of 20 ms to 200

CONT., auto-saving is automatically set

・

Procedure

1. Press the STATUS key to display the STATUS screen.

2. Move the flashing cursor to the format item.

3. Use the function keys to select the display format.

4. Set the graph type when the display format is set to DUAL, QUAD, OCT or

5. Press the CHAN key to display the CHANNEL screen.

6. Move the flashing cursor to the point in the figure below.

The layout can be set for showing input signals on the screen display and recording them on the printer.

The following layout is available: single, dual, quad, oct (Waveform display screen), hex (Print only, Display oct style）X-Y single, X-Y dual (dot/line)

The voltage per division is automatically changed according to the display format.

Screen: STATUS

HEX screen display.

The figure shows the setting for the channel 1 (CH1). Setting for the channel 2 to 16 should be made in the same way.

Flashing cursor

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7. Use the function keys to select.

Function

display

Meaning

Move the cursor up in the selection window.

Move the cursor down in the selection window.

##F2

In the cases of HEX, as far as the printer recording output is concerned, the waveforms for each channel are automatically distributed on each graph according to the table below: For details on logic channels, refer to Section 9.3.8.

Graph

Analog

channel

CH 1

CH 2

CH 3

CH14

CH15

CH16

CH17

CH18

Graph

Analog

channel

CH19

CH 10

CH 11

CH 12

CH 13

CH 14

CH 15

CH 16

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Single graph

Display and record as one graph. (At the most, 16 analog + 16 logic signals)

s535-2, 3, 4, 5, 6, 7

Dual graph

･

Display and record as two graphs. (At the most, 16 analog +16logicsignals)

･

Specify which input channel to use for waveform graph display and recording.

Quad graph

･

Display and record as four

graphs. (At the most, 16 analog + 8 logic signals)

･

Specify which input channel to

use for waveform graph display and recording.

Oct graph

･

Record as eight graphs. (At the most, 16 analog + 4 logic signals)

･

Specify which input channel to use for waveform graph display and recording.

X-Y single graph (dot)

X-Y dual graph (line)

HEX graph

･

Display is same as Oct screen display.

･

Record as sixteen graphs. (At the most, 1 analog + 2 logic signals)

･

Channel positions are automatically distributed.

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5.3.6 Setting the Print Mode

Select the format, waveform, or numerical value should be used to output measured data.

Waveform Numerical value

The waveform is printed.

The data spacing interval also must be set.

Procedure

(1) Setting the printer format

1. Press the STATUS key to display the STATUS screen.

2. Move the flashing cursor to the print mode item.

3. Use the function keys to make a setting.

(2) Setting the print interval

1. When the numerical value is selected, set the print interval. (unit: DIV)

2. Move the flashing cursor to the interval item.

3. Use the function keys to make a setting.

Screen: STATUS

Function

display

Meaning

Measurement data and the result of calculation

are printed as a waveform.

Measurement data and the result of calculation

are printed as numeric data.

Since 1 division represents 100 samples, the print interval "0.01" refers to a printout of every sample (no print interval). When the print interval longer than the recording length is set, only the first dot is printed.

NOTE

Function

display Meaning

Move the cursor up in the selection window.

Move the cursor down in the selection window.

･

The maximum and minimum values are printed (see Appendix 3.4).

･

The print intervals of 0.01 to 0.5 DIV can be selected, only when there are waveform data present.

･

When numerical values are output for real-time printing, the minimum print interval is 1 division.

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5.3.7 Setting the Additional Recording Function

This records, regarding the memory as though it were recording paper. The memory capacity of 8 M words can accommodate up to 2000 divisions of waveform data. With 32 M words (after optional memory expansion), waveform data of up to 10000 divisions can be saved. The waveform can be scrolled and printed out. Switching the additional recording on and off affects the use of memory as shown below.

Additional recording: OFF

Additional recording: ON

Procedure

1. Press the STATUS key to display the STATUS screen.

2. Move the flashing cursor to the record add item.

3. Use the function keys to make a setting.

1. Recording 25 divisions of waveform

2000 DIV（No memoryexpansion

25 DIV

2. Recording another 25 divisions of waveform The first set of measurement data is discarded, and recording of the second set of measurement data starts again from the beginning of memory.

25 DIV

Screen: STATUS

1. Recording 25 divisions of waveform

2000 DIV（No memoryexpansion

25 DIV

2. Recording another 25 divisions of waveform The first set of measurement data is preserved, and recording of the second set of measurement data starts after th first set.

25 DIV

The first and second sets of waveforms can be observed by scrolling or printing the waveform.

Function

display

Meaning

Additional recording is disabled.

Additional recording is enabled.

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･

NOTE

Time values output to the printer and displayed on the screen with the additional recording function enabled are equal to those of the most recently acquired waveforms. Therefore, when measuring waveforms in a different time axis range, always take that difference into consideration.

･

When the 2000 (32 M words: 10000) DIV has been reached, old data will be overwritten.

･

In the recorder, the trigger mark ( ) is written as the start position mark. In an additional recording, the trigger mark is displayed in front of the most recently entered data.

･

If auto-save is enabled, only newly acquired waveforms are saved. Even when A and B cursors appear on the screen, no partial save is performed, because the setting is disabled when the

START

key is pressed.

5.3.8 Setting the Printer Function (Real Time Printing)

The input waveform is continuously printed in real time.

Procedure

1. Press the STATUS key to display the STATUS screen.

2. Move the flashing cursor to the printer item.

3. Use the function keys to make a setting.

NOTE

Screen: STATUS

Function

display

･

At a time axis range setting of 200 ms/DIV or faster, the waveform data

Meaning

Printing is disabled.

Printing is enabled.

will be printed out later. See Section 18.5, "Recorder Function."

･

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5.3.9 Setting the Auto Save Function

・

When the function is enabled, measurement data are automatically stored on a floppy disk, PC card, MO disk or connected SCSI device after they are captured.

・

The Auto Save function stores a file in the directory currently selected on the file screen. See Section 14.12.2.

Procedure

Screen: STATUS

1. Press the STATUS key to display the STATUS scr een.

2. Move the flashing cursor to the auto save item.

3. Use the function keys, select the media for auto saving.

Function

display Meaning

Auto save is disabled.

Automatically stored on floppy disk

Automatically stored on PC card.

Automatically stored on connected SCSI device.

Automatically stored on MO disk.

(When using a LAN card)

A LAN is used to transfer data to the 9333 LAN COMMUNICATOR.

4. When Media is selected, the Storage Method item appears.

Function

display Meaning

When the media becomes full, automatic storage stops.

When the media becomes full, old files are deleted to make room for automatic storage.

With the binary format selected, the file with the extension 'REC' is deleted. With the text format selected, files with the extension 'TXT' are deleted.

5. Move the flashing cursor to type

Function

display Meaning

Data are stored as binary data.

Dataarestoredastextdata.

, and select the format.

Data stored in the text format is not readable by the 8841/42.

6. When the data format to be saved is set to text data, the intermittent setting item is displayed. Use the function keys or Jog/Shuttle control to make a setting.

File names cannot contain the characters +, -, ], or [. Please note that file names containing these characters will not be saved.

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5.3 STATUS Settings (REC)

Hioki 8841, 8842 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual