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Hioki 8804 Instruction Manual

Hioki 8804 Instruction Manual

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INSTRUCTION MANUAL
8804
MEMORY HiCORDER

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Summary of Contents for Hioki 8804

  • Page 1 INSTRUCTION MANUAL 8804 MEMORY HiCORDER...

  • Page 3: Table Of Contents

    Contents Introduction Inspection Safety Notes on Use Chapter Summary viii Names and Functions of Parts Chapter 1 Chapter Overview 1.1 Product Overview 1.2 System Operation Chapter 2 Specifications 2.1 Main Units Specifications 2.1.1 General specifications 2.1.2 Trigger Unit 2.1.3 Memory Recorder Function 2.1.4 Recorder Function 2.1.5 RMS recorder function 2.1.6 X-Y CONT Recorder Function...
  • Page 4 Chapter 4 Screen Displays and Settings 4.1 Screen Displays 4.2 Types of Screen Display 4.3 Screen Configuration 4.4 Changing the waveform, status, trigger, and system screens 4.5 Function Changing Chapter 5 Basic Operation 5.1 Setting Method 5.1.1 Setting Procedure 5.1.2 Example Settings 5.2 Basic Setting Items of Each Function 5.3 Starting and Stopping Measurement 5.3.1 Measurement Starting and Stopping in the...
  • Page 5 6.3 Basic Operational Procedures 6.3.1 Operational Flow 6.3.2 Example of Operation 6.4 Auto-Range Function 6.5 Roll Mode Function 6.6 Using X-Y Waveform Plots 6.7 Numerical Calculation 6.8 Memory Recorder Function Possible Recording Time Chapter 7 Recorder Function Mode 7.1 What is the Recorder Function? 7.1.1 Introduction 7.1.2 Finding Reference Material in This Manual 7.2 Display Screens...
  • Page 6 Chapter 10 Applications 10.1 Using the A and B Cursors (All Functions) 10.1.1 The types of the cursors 10.2 Waveform Scrolling Chapter 11 Trigger Function 11.1 Overview 11.2 Internal Trigger 11.3 Setting the Trigger Types 11.3.1 Level Trigger 11.3.2 Window-out Trigger 11.3.3 Logic Trigger 11.3.4 Voltage Dip Trigger (Memory Recorder Function)
  • Page 7 12.3.6 Printing Intensity Adjustment 12.3.7 Screen Contrast Adjustment 12.3.8 Language Display Setting 12.3.9 Appending Comments 12.3.10 Setting the Clock 12.4 Settings on the System Screen (Page 2) 12.4.1 Scaling Function 12.4.2 Saving, Reading, and Deleting the Setting Condition 12.4.3 Self Check Chapter 13 Input Units 13.1 Analog Inputs 13.2 Specifications...
  • Page 8 Appendices APPENDIX 1 Apendix.1 Background APPENDIX 1 Apendix.2 Error Messages APPENDIX 5 Apendix.3 Glossary APPENDIX 6 Apendix.4 Example of Waveforms for Each Function APPENDIX 7 Index INDEX 1...

  • Page 9: Introduction

    ――――――――――――――――――――――――――――――――――――――― Introduction Thank you for purchasing this HIOKI "8804 MEMORY HiCORDER." To get the maximum performance from the unit, please read this manual first, and keep this at hand. Inspection When the unit is delivered, check and make sure that it has not been damaged in transit.

  • Page 10: Safety

    ――――――――――――――――――――――――――――――――――――――― Safety This equipment is designed to according to IEC 348 WARNING Safety Standards, and has been tested for safety prior to shipment. During high voltage measurement, incorrect measurement procedures could result in injury or death, as well as damage to the equipment. Please read this manual carefully and be sure that you understand its contents before using the equipment.
  • Page 11 ――――――――――――――――――――――――――――――――――――――― Safety symbols This Instruction Manual provides information and warnings essential for operating this equipment in a safe manner and for maintaining it in safe operating condition. Before using this equipment, be sure to carefully read the following safety notes. This symbol is affixed to locations on the equipment where the operator should consult corresponding topics in this manual (which are...
  • Page 12 ――――――――――――――――――――――――――――――――――――――― The following symbols are used in this Instruction Manual to indicate the relative importance of cautions and warnings.  Indicates that incorrect operation presents extreme DANGER danger of accident resulting in death or serious injury to the user. Indicates that incorrect operation presents WARNING significant danger of accident resulting in death or serious injury to the user.

  • Page 13: Notes On Use

    450 V(either AC or DC) between a pair of analog input units or between an analog input unit and the main unit. To prevent damage to the 8804, never exceed the limits in the following table for the various input connections.  ...
  • Page 14 ――――――――――――――――――――――――――――――――――――――― When using the batteries, use LR6 alkaline batteries WARNING or 9420 BATTERY PACK. In this case, do not use new batteries with old ones. Also, do not mix batteries of different types. We take no responsibility for an accident using the batteries and battery packs which are not specified.
  • Page 15 ――――――――――――――――――――――――――――――――――――――― (2) Using the Printer ・Using the printer for low-speed printing (Recorder function) in a high temperature or high humidity environment should be avoided at all costs. This can seriously reduce the printer life. ・If the recording paper is mistakenly inserted back to front, waveform recording is impossible.

  • Page 16: Chapter Summary

    viii ――――――――――――――――――――――――――――――――――――――― Chapter Summary This manual consists of the following chapters. "Introduction", "Safety", "Notes on Use" describe precautions on use, overview, and features of this unit. Be sure to read them all. Next, check the Names and Functions of Parts" and the unit to confirm your understanding of the function.
  • Page 17 ――――――――――――――――――――――――――――――――――――――― Chapter 8 RMS Recorder Function Mode Explain RMS recorder function mode, including examples of operation. Chapter 9 XY CONT Recorder Function Mode Explain XY CONT recorder function mode, including examples of operation. Chapter 10 Applications Describe the A and B cursors and scrolling operations. Chapter 11 Trigger Functions Describe the settings of trigger functions, and how to use them.

  • Page 18: Names And Functions Of Parts

    ――――――――――――――――――――――――――――――――――――――― Names and Functions of Parts Front View FEED While pressing this key, the recording paper is fed forward. PRINT Press this key to print out the waveform stored in memory. COPY Press this key to print a copy of the current screen display.
  • Page 19 ・While charging the 9420 BATTERY PACK, the LED is illuminated red. STOP Press this key to stop operation of the 8804. BACK LIGHT ・Press this key to turn the LCD back light on and off. ・When using the batteries and if any key is not pressed for about 20 seconds with the backlight on, the backlight automatically goes off.
  • Page 20 ――――――――――――――――――――――――――――――――――――――― Right Side View Logic probe terminals ・These are the input terminals for the logic inputs, and are only to be used with the optional logic probes. ・A maximum of two logic probes can be connected (CH A, CH B). Analog input terminals These are input terminals for analog inputs, non-balanced input type (CH 1, CH 2).
  • Page 21 Connect to ground. AC adapter connecting terminal Use the specified 9418-10 AC ADAPTER(PSA-30U-120, PHIHONG). EXT TRIG/TRIG OUT terminals These terminals can be used to synchronize a number of the 8804 units for parallel operation. ――――――――――――――――――――――――――――――――――― Names and Functions of Parts...
  • Page 22 ――――――――――――――――――――――――――――――――――――――― Bottom View Battery compartment Six LR6 alkaline batteries or the 9420 can be installed. ――――――――――――――――――――――――――――――――――― Names and Functions of Parts...

  • Page 23: Product Overview

    The main features of the 8804: (1) A compact, light and portable unit ・Because the 8804 is compact and light, it is highly portable. ・The 8804 is also extremely convenient as a portable unit, since it can be powered either through an AC adapter or by batteries.
  • Page 24 (5) Four function modes corresponding to various types of measurement The 8804 is provided with several function modes: a Memory recorder function mode (also providing an X-Y plot function) for reliably catching high speed phenomena such as transient phenomena;...
  • Page 25 ――――――――――――――――――――――――――――――――――――――― (10) Scaling function By setting the physical amount of input signal and the name of the units used, it is possible to convert measured data, which are obtained as voltage values, into values in set units. ――――――――――――――――――――――――――――――――――― 1.1 Product Overview...

  • Page 26: System Operation

    (3) The A/D converted data is recorded in memory under control of the memory controller circuit. (4) The 8804 main unit employs a digital trigger circuit, and in the case of an internal trigger, generates a trigger signal by comparing the digital value after A/D conversion with a set value.
  • Page 27 ――――――――――――――――――――――――――――――――――――――― Analog input units 8-bit CPU Photo Analog input coupler Total 2 probes Photo Analog input coupler Memory control Logic inputs Trigger circuit Printer Logic probes Total 2 probes Storage memory Logic Control 64 K words probes panel Block Diagram ―――――――――――――――――――――――――――――――――――...
  • Page 28 ――――――――――――――――――――――――――――――――――――――― ――――――――――――――――――――――――――――――――――― 1.2 System Operation...

  • Page 29: Chapter 2 Specifications

    2 analog channels + 8 logic channels The number of channels The logic and analog channels are both standard equipment for the 8804. 64 K words Memory capacity (Analog 9 bits + logic 4 channels) × 64 K words/channel (when channel 1 is in use) (Analog 9 bits + logic 4 channels) ×...
  • Page 30 ――――――――――――――――――――――――――――――――――――――― 7 MΩ or more/500 VDC; one minute at Insulation resistance and 1.5 kVAC (between the main unit and the Dielectric strength primary side of the 9418-10) 100 MΩ or more/500 VDC; one minute at 2 kVAC (between the each analog input, and between the analog input and the main unit) Depending on the 9418-10 AC ADAPTER (PSA- Power supply...
  • Page 31 ――――――――――――――――――――――――――――――――――――――― ■ Recorder Thermosensitive recording method using a Recording method thermal line head Withstands 5×10 pulses (25% printing duty Printer lifetime factor) Wear endurance: at least 30 km Roll type thermosensitive recording paper Recording paper 74 mm × 10 m Recording width Total recording width 72 mm (576 dots) Waveform portion 60 mm f.s.

  • Page 32: Trigger Unit

    ――――――――――――――――――――――――――――――――――――――― 2.1.2 Trigger Unit Digital comparison method Trigger method In the Memory recorder function: SINGLE, Trigger modes REPEAT, AUTO In the Recorder function: SINGLE, REPEAT Trigger source Triggering ON or OFF is possible for each source of channel 1 (logic A), channel 2 (logic B), external, and timer.

  • Page 33: Memory Recorder Function

    ――――――――――――――――――――――――――――――――――――――― 2.1.3 Memory Recorder Function 200, 400 μs/DIV Time axis (TIME/DIV) 1, 2, 5, 10, 20, 50, 100, 200, 500 ms/DIV 1, 2, 5, 10, 30 s/DIV 1, 2 min/DIV 80 line/DIV Time axis resolution Sampling period 1/80 of the time axis 20, 50, 100, 200, 400 (channel 1 and 2) Recording length 800 DIV (channel 1 only)

  • Page 34: Recorder Function

    ――――――――――――――――――――――――――――――――――――――― 2.1.4 Recorder Function 200, 500 ms/DIV, 1 s/DIV (display only) Time axis (TIME/DIV) 2, 5, 10, 30 s/DIV 1, 2, 5, 10, 30 min/DIV 1 h/DIV 80 line/DIV (with the printer) Time axis resolution 400 kS/s fixed Sampling speed Recording length 20, 50, 100, 200, 400 DIV, CONT Screen・print...

  • Page 35: Rms Recorder Function

    ――――――――――――――――――――――――――――――――――――――― 2.1.5 RMS recorder function Time axis (time/div) 5, 10, 30 s/DIV 1, 2, 5, 10, 30 min/DIV 1 h/DIV Time axis resolution 80 line/DIV (with the printer) 4 kS/s fixed (16 rms datas/s) Sampling speed ±3% f.s. (at 50/60±2 Hz, DC) (f.s.=6 DIV) RMS accuracy Measuring object Commercial power supplies (50/60 Hz)

  • Page 36: X-Y Cont Recorder Function

    ――――――――――――――――――――――――――――――――――――――― 2.1.6 X-Y CONT Recorder Function X and Y axes X axis: channel 1, Y axis: channel 2 Sampling speed 5 kS/s (dot), 2.5 kS/s max (line) 60 mm × 60 mm (6 DIV × 6 DIV) with the Effective recording dimensions printer Unlimited...

  • Page 37: Auxiliary

    ――――――――――――――――――――――――――――――――――――――― 2.1.7 Auxiliary Screen copy Available Available Scaling function Comment input Available function Comment input possible for each channel (12 characters max) ON/OFF Auto list・gauge Numerical Maximum value, minimum value, peak value, calculation function average value, rms value, area value Available Cursor read out Waveform back up...

  • Page 38: A List Of Optional Accessories

    ――――――――――――――――――――――――――――――――――――――― 2.1.8 A List of Optional Accessories Accessories ･ 9574 INPUT CORD ･ 9232 RECORDING PAPER (roll paper) ･ Roll paper attachments ･ Instruction Manual Accessories purchased separately ･ 9232 RECORDING PAPER (10 m, 10 rolls) ･ 9418-10 AC ADAPTER (PSA-30U-120, PHIHONG) (90 to 250 VAC free, output 12 VDC) ･...
  • Page 39 ――――――――――――――――――――――――――――――――――――――― The 9270 to 9272 CLAMP ON SENSORs and the 9277 to NOTE 9279 UNIVERSAL CLAMP ON CTs are used with the 9555 SENSOR UNIT. They cannot be used by themselves. ――――――――――――――――――――――――――――――――――― 2.1 Main Units Specifications...
  • Page 40 ――――――――――――――――――――――――――――――――――――――― ――――――――――――――――――――――――――――――――――― 2.1 Main Units Specifications...

  • Page 41: Setup

    ――――――――――――――――――――――――――――――――――――――― Chapter 3 Preparation and Setup 3.1 Setup (1) AC adapter Always use the specified 9418-10 AC ADAPTER(PSA- DANGER 30U-120, PHIHONG). The rated supply voltage of an AC adapter is 100 to 240 VAC. (Voltage fluctuations of 10% from the rated supply voltage are taken into account.) The rated supply frequency is 50/60 Hz.
  • Page 42 NOTE ･ If the battery voltage drops while the unit is running off of battery power, the 8804 will automatically switch off the power supply. If the unit is left in this state for an extended period of time, the battery pack may be discharged too much.
  • Page 43 ・Be sure to ground the 8804 properly even when using batteries. (4) Environment for use The operating temperature and humidity range for the 8804 is 5℃ to 40℃ and 35% to 80% RH. Also, do not expose the unit to direct sunlight, dust, or corrosive gas. ――――――――――――――――――――――――――――――――――― 3.1 Setup...

  • Page 44: Loading Recording Paper

    ――――――――――――――――――――――――――――――――――――――― 3.2 Loading Recording Paper (1) Pull the stock cover to open. Stock cover (2) Raise the head up/down lever. Head up/down lever (3) Insert the attachments into the hole of the roll of 9232 RECORDING PAPER. Insert the leading edge of the paper from under into the gap behind the printer roller, and pull it out upward.
  • Page 45 ――――――――――――――――――――――――――――――――――――――― (4) Set the paper into its holder and pull it out about 10 cm, and make sure that it is positioned quite straight. There is a possibility of a paper jam if the recording NOTE paper is slanted against to the roller. Be sure to set the paper correctly.
  • Page 46 ･ 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. ――――――――――――――――――――――――――――――――――― 3.2 Loading Recording Paper...

  • Page 47: Care Of Recording Paper

    ――――――――――――――――――――――――――――――――――――――― 3.3 Care of Recording Paper ･ Thermosensitive recording roll paper which until use is kept in normal conditions will not be affected by the environment. However the paper should not be kept for a long time at a temperature higher than 40℃. Low temperatures cause no problems.

  • Page 48: During Measurement

    The logic inputs and the 8804 have a common WARNING ground. When measuring input which has different reference potential, beware of electric shock.

  • Page 49: Chapter 4 Screen Displays And Settings

    ――――――――――――――――――――――――――――――――――――――― Chapter 4 Screen Displays and Settings 4.1 Screen Displays For each function the screen displays can be divided into three screens: waveform, status, and trigger; and there are also three system screens. The Memory recorder function mode also has a numerical calculation screen. 4.2 Types of Screen Display (1) The status (stts) screen The general settings, such as time axis and recording...
  • Page 50 ――――――――――――――――――――――――――――――――――――――― (4) The system (SYSTEM) screen System screen contains 3 screens: Input level Monitor screen, Page 1 screen, and Page 2 screen. Input level monitor screen displays level monitor. In page 1 screen, system variable, comment setting, and clock setting are performed. In page 2 screen scaling, saving the setting condition, and each checking are performed.

  • Page 51: Screen Configuration

    ――――――――――――――――――――――――――――――――――――――― 4.3 Screen Configuration Memory Recorder Memory Recorder Memory Recorder Waveform Screen Status Screen Trigger Screen Numerical Calculation Screen Recorder Recorder Recorder Waveform Screen Status Screen Trigger Screen RMS Recorder RMS recorder RMS Recorder Waveform Screen Status Screen Trigger Screen XY CONT XY CONT XY CONT...

  • Page 52: Changing The Waveform, Status, Trigger, And System Screens

    ――――――――――――――――――――――――――――――――――――――― 4.4 Changing the waveform, status, trigger, and system screens Method Press the key, and the screen display changes MENU/WAVE as shown in the Screen Configuration in the previous page. Press the key, the measurement will start on any START NOTE screen except the system screen, and changes to the waveform screen.

  • Page 53: Chapter 5 Basic Operation

    ――――――――――――――――――――――――――――――――――――――― Chapter 5 Basic Operation 5.1 Setting Method By using the CURSOR keys, keys, and ＋ − key, all settings can be made. MENU/WAVE 5.1.1 Setting Procedure (1) Using the key, change the screen display to MENU/WAVE the screen of setting item. (2) Using the CURSOR keys, move the flashing cursor to the item to be set.

  • Page 54: Example Settings

    ――――――――――――――――――――――――――――――――――――――― 5.1.2 Example Settings Settings for Recorder function on the status (stts) screen. (1) Press the key, and select the status screen MENU/WAVE (stts). (2) Set the function to RECORD. 1. Using the CURSOR keys, move the flashing cursor on the function item. 2.
  • Page 55 ――――――――――――――――――――――――――――――――――――――― (4) Set the recording length to CONT. 1. Using the CURSOR keys, move the flashing cursor to shot. 2. By using the keys, set to ＋ − " ". CONT (5) Set the screen setting to single (SINGLE). 1. Using the CURSOR keys, move the flashing cursor to format.

  • Page 56: Basic Setting Items Of Each Function

    ――――――――――――――――――――――――――――――――――――――― 5.2 Basic Setting Items of Each Function Function Memory X-Y CONT Recorder Selection recorder recorder recorder ● ● ● − (1) Time axis range (2) Magnification/compression along the time axis ● ○ ○ − range ● ● ● − (3) Recording length ●...
  • Page 57 ――――――――――――――――――――――――――――――――――――――― (1) Time axis range Show the time interval along the time axis direction for 1 DIV (a scale of the recording paper). Selection 200, 400 μs/DIV 1, 2, 5, 10, 20, 50, 100, 200, 500 ms/DIV Memory recorder 1, 2, 5, 10, 30 s/DIV 1, 2 min/DIV 200, 500 ms/DIV, 1 s/DIV (Display only) 2, 5, 10, 30 s/DIV...
  • Page 58 ――――――――――――――――――――――――――――――――――――――― ×10 ×1/2 (3) Recording length The length of recording for one measurement operation (number of DIV) can be set. Selection 20, 50, 100, 200, 400 DIV (channel 1, 2) Memory recorder 800 DIV (channel 1 only) Recorder 20, 50, 100, 200, 400 DIV, CONT RMS recorder ―――――――――――――――――――――――――――――――――――...
  • Page 59 ――――――――――――――――――――――――――――――――――――――― (4) Screen setting ・The style can be set for showing input signal waveforms on the screen display and recording them on the printer. ・The styles SINGLE and DUAL are available. X-Y DOT and X-Y LINE are available only in the Memory recorder function.
  • Page 60 ――――――――――――――――――――――――――――――――――――――― 3. X-Y DOT, X-Y LINE ・Display the X-Y combination of waveforms. (Refer to Section 6.6, Using X-Y Waveform Plots.") ・The channel 1 is X-axis and the channel 2 is Y axis. ・Display and record as one graph. Input waveform Input waveform The difference between X-Y DOT and X-Y LINE is NOTE...
  • Page 61 ――――――――――――――――――――――――――――――――――――――― (7) Line style (X-Y CONT recorder only) It sets to display and record the input signal (the sampled data) either just as it is, or after subjecting it to linear interpolation. Dot display Line display ・Linear interpolation is not ・Linear interpolation is performed.
  • Page 62 ――――――――――――――――――――――――――――――――――――――― (9) Waveform display It sets the channel to be displayed or recorded to ON (■) or OFF (□). Analog channel 1, 2 Logic channel A, B (10) Voltage axis (X, Y axis) range ・Set the voltage value for 1 DIV along the voltage axis direction (vertically).
  • Page 63 ――――――――――――――――――――――――――――――――――――――― (11) Input coupling It sets the coupling condition of the input signal. Selection The input signal is directly connected to the input DC (V) amplifier. This allows a DC component to be measured. The input signal is not GND ( connected.
  • Page 64 ――――――――――――――――――――――――――――――――――――――― (13) Position ・Set the zero position for each channel. ・When the magnification/compression ratio is set to ×1, the selections are from -0.4 DIV to 6.4 DIV. Refer to the table on the next page for other selections. ・When the position setting is 3 DIV, 0 V appears at the center of the screen (50% position).
  • Page 65 ――――――――――――――――――――――――――――――――――――――― The position has the significance shown in the figure NOTE below. It is possible to display the hidden portion of the waveform, according to the relative position of the displayed section at which 0 V appears. Time axis waveform A/D Data Display ―...
  • Page 66 ――――――――――――――――――――――――――――――――――――――― (14) Filter ・Set low-pass filters (cut-off frequency) which is inside of the analog inputs and restricts frequency. ・This filter has the good effect of getting rid of the following phenomena: 1. In case of level recording in the Recorder function mode, because of high speed sampling and wide band amplification, the influence of ripple components and noise in the signal can thicken the recording line.
  • Page 67 ――――――――――――――――――――――――――――――――――――――― (18) Automatic printing It automatically records into the printer. Refer to Section 5.4.3, Recording on the Printer." (19) Numerical calculation (Memory recorder only) It is possible to calculate the waveform data. Refer to Section 6.7, Numerical Calculation." (20) Zero adjustment It adjusts the waveform position at the position value when the input voltage is 0 V.

  • Page 68: Starting And Stopping Measurement

    ――――――――――――――――――――――――――――――――――――――― 5.3 Starting and Stopping Measurement Pressing the key starts measurement. While START measurement is taking place, the LED above the START key is illuminated green. When measurement has finished, the LED goes out. Method 1. Press the key. START Measurement will start.

  • Page 69: Stopping Measurement (In The Memory Recorder Function)

    ――――――――――――――――――――――――――――――――――――――― (3) When the trigger mode is AUTO: ・Press the key and wait one second for the trigger START conditions to hold. After that whether or not the trigger conditions hold, an amount of data of length equal to the recording length will be read in and stored.

  • Page 70: Printer Operations

    ――――――――――――――――――――――――――――――――――――――― 5.4 Printer Operations 5.4.1 Types of Recording and Functions Function Memory X-Y CONT Recorder recorder recorder recorder Recording method ● ● ● ● Manual print ● ● ● − Partial print ● ● ● − Auto print ● ● ●...
  • Page 71 ――――――――――――――――――――――――――――――――――――――― Method (on the status screen) 1. Move the flashing cursor to prt kind. 2. By using the keys, select ＋ − WAVE or LOGGING. 3. When LOGGING is selected in step 2., move the flashing cursor to interval and set the data sampling interval to be printed out.

  • Page 72: Recording On The Printer

    ――――――――――――――――――――――――――――――――――――――― 5.4.3 Recording on the Printer (1) Manual printing (all function) ･ This prints out the stored data from one measurement for its entire recording length. ･ Since the measurement data is saved in memory, it can be reprinted as many times as required. Method 1.
  • Page 73 ――――――――――――――――――――――――――――――――――――――― Method (on the Waveform screen) 1. Using the A and B cursors, indicate the part of the waveform which is desired to record. (Refer to Section 10.1, Using the A and B cursors." 2. Press the key. PRINT This portion is printed out ･...
  • Page 74 ――――――――――――――――――――――――――――――――――――――― Method (on the status screen) 1. Using the CURSOR keys, move the flashing cursor to auto print. 2. By using the keys, select ＋ − . If is selected, the printing out is not performed. 3. Press the key. It prints out START simultaneously with the data reading.

  • Page 75: Head Up And Paper End

    ――――――――――――――――――――――――――――――――――――――― 5.4.4 Head Up and Paper End ･ When the printer head is up, the printer will not operate. An attempt to print produces the following error message: "ERROR 2: Lower the printer lever." ･ If the printer paper runs out, printing stops. An attempt to print produces the following error message: "ERROR 1: Reload the printer paper."...

  • Page 76: Zero Adjustment

    ――――――――――――――――――――――――――――――――――――――― 5.5 Zero Adjustment This function provides for accurate adjustment of the waveform to the origin position when inputting a zero voltage. Use it for reading precise values from the screen, a printed recording or to ensure accurate results from waveform computations.

  • Page 77: Chapter 6 Memory Recorder Function Mode

    6.1.1 Introduction In this function mode, once the input signal has been stored in the memory of the 8804, it can be subjected to various forms of processing. By recording the data, a great number of useful ways become possible.

  • Page 78: Finding Reference Material In This Manual

    ――――――――――――――――――――――――――――――――――――――― (6) Magnified and compressed display and recording are available, both along the time axis and along the voltage axis. ×10, ×5, ×2, ×1, ×1/2, ×1/5, ×1/10, Along the time axis ×1/20, ×1/50, ×1/100 Along the voltage ×1/2, ×1, ×2, ×4 axis (7) Three types of display format can be chosen from.
  • Page 79 ――――――――――――――――――――――――――――――――――――――― (2) Start/stop measurement operation. (Refer to Section 5.3, "Starting and Stopping Measurement.") Measurement is started by pressing the key and START finished by pressing the key. STOP (3) Printing function (Refer to Section 5.4, "Printer Operations.") There are two styles of recording; waveform (WAVE) and numerical values (LOGGING).
  • Page 80 ――――――――――――――――――――――――――――――――――――――― (8) Screen setting (Refer to Section 5.2, "Basic Setting Items of Each Function" - (4).) Three types of screens (display format) can be selected. (9) Waveform X-Y plot (Refer to Section 6.6, "Using X-Y Waveform Plots.") (10) Channel information function (Refer to Section 5.2, "Basic Setting Items of Each Function"...

  • Page 81: Display Screens

    ――――――――――――――――――――――――――――――――――――――― 6.2 Display Screens (1)Status screen Select function. Function Memory, Record, RMS, XY CONT, System 200, 400 μs/DIV Set the time for 1 scale Time axis range 1, 2, 5, 10, 20, 50, 100, (1 DIV). 200, 500 ms/DIV The sampling period is 1, 2, 5, 10, 30 s/DIV 1/80th of the set value 1,2 min/DIV...
  • Page 82 ――――――――――――――――――――――――――――――――――――――― 1, 8, 16, 40, 80, 160, 400, When recording as Print interval 800, 1600 numerical value, set the printing interval. Auto-print OFF, ON Print simultaneously with displaying the waveform. Display information for Channel SETTING, UP & LOW information the input setting or upper and lower limit values on the waveform screen.
  • Page 83 ――――――――――――――――――――――――――――――――――――――― (2) Waveform screen Function Memory, Record, RMS, Select function. XY CONT, System SINGLE, REPEAT, AUTO Select whether to stop Trigger mode after a single recording, or carry out repeated recording. Set the internal trigger. Internal trigger OFF, LEVEL, OUT, LOG, 200, 400 μs/DIV Set the time for 1 scale Time axis range...
  • Page 84 ――――――――――――――――――――――――――――――――――――――― V(DC), (GND) Select the connection for Input coupling the input. ×4, ×2, ×1, ×1/2 Set the magnification/ Magnification/ compression compression ratio along along the the voltage axis for each voltage axis channel. Set the position for each Position -0.4 to 6.4 DIV (magnification ratio;...
  • Page 85 ――――――――――――――――――――――――――――――――――――――― (3) Trigger screen Select function. Function Memory, Record, RMS, XY CONT, System AND, OR Set whether the triggers Trigger source AND/OR are AND or OR. Set the internal trigger. Internal trigger OFF, LEVEL, OUT, LOGIC, DIP OFF, ON Using of the external External trigger input as a trigger source is possible .

  • Page 86: Basic Operational Procedures

    ――――――――――――――――――――――――――――――――――――――― 6.3 Basic Operational Procedures 6.3.1 Operational Flow The flowchart below illustrates the sequence of operations involved in using the memory recorder function. Start Turn the power ON Connect the inputs Status (stts) screen Set to the Memory recorder Function setting function mode.
  • Page 87 ――――――――――――――――――――――――――――――――――――――― Set whether measurement data Set printer output form will be sent to the printer as a (prt kind) waveform or as numerical values. Set whether or not printing will Set the auto-print function occur simultaneously with screen display. Set the channels for which display Settings relating to the inputs and recording will be performed.

  • Page 88: Example Of Operation

    ――――――――――――――――――――――――――――――――――――――― 6.3.2 Example of Operation This example illustrates the procedure connecting the 8804 to an oscillator to measure and record a 8 Vp-p 1 kHz sine wave input. (1) Turn on the power. Turn on the power switch on the 8804.
  • Page 89 ――――――――――――――――――――――――――――――――――――――― (5) Set the waveform display. 1. Press the key to display MENU/WAVE the waveform screen. 2. Using the CURSOR keys and ＋ − keys, set time axis magnification/compression to " ". ×1 (6) Begin measurement. Press the key. The LED above the key will light START up and then the measurement starts.
  • Page 90 ――――――――――――――――――――――――――――――――――――――― 2. Press the key. The manual print as the figure PRINT below is recorded. ――――――――――――――――――――――――――――――――――― 6.3 Basic Operational Procedures...

  • Page 91: Auto-Range Function

    ――――――――――――――――――――――――――――――――――――――― 6.4 Auto-Range Function ・The time axis range and the voltage axis range for the input waveform are automatically set and shown on the screen display. ・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 8 DIV.
  • Page 92 ――――――――――――――――――――――――――――――――――――――― Time axis range, input range, zero Set automatically. position value Trigger source (channels 1 and 2), trigger Set automatically. level value Set to OFF, V Input filter, and input coupling (DC). Set to level, rising Trigger type, slope, and filter ( ), or OFF.

  • Page 93: Roll Mode Function

    ――――――――――――――――――――――――――――――――――――――― 6.5 Roll Mode Function ・This function is only available in the time axis range which is less than 20 ms/DIV when the screen is set to SINGLE or DUAL. ・With the roll mode setting OFF, after the start of measurement, because usually auto-print is only performed after one recording length of data has been completely sampled, during low speed sampling it takes a...

  • Page 94: Using X-Y Waveform Plots

    ――――――――――――――――――――――――――――――――――――――― 6.6 Using X-Y Waveform Plots ・Setting the screen displays to X-Y DOT or X-Y LINE allows for X-Y combination of waveforms. ・The channel 1 is shown as X-axis and the channel 2 is shown as Y-axis. ・Magnification and compression along the voltage axis are also effective for X-Y plots.
  • Page 95 ――――――――――――――――――――――――――――――――――――――― Method (on the status "stts" screen) 1. Using the CURSOR keys, move the flashing cursor to format. 2. By using the keys, set to ＋ − X-Y DOT or X-Y LINE. On the X-Y DOT and X-Y LINE screens, the following NOTE items can be set.

  • Page 96: Numerical Calculation

    ――――――――――――――――――――――――――――――――――――――― 6.7 Numerical Calculation For sampled waveform data or for waveform data which is the result of waveform calculation processing, the following types of calculation can be performed: (1) Maximum values and time to maximum values (2) Minimum values and time to minimum values (3) Peak-to-peak values (4) Mean values (5) Rms values  ...
  • Page 97 ――――――――――――――――――――――――――――――――――――――― Method (on the numerical calculation "measure" screen) 1. Using the CURSOR keys, move the flashing cursor to measurement.  Set to " " by pressing the ＋ − keys. 2. Using the CURSOR keys, move the flashing cursor to print. Select ON or OFF (whether the results of calculation is printed out or not ) by pressing the...
  • Page 98 ――――――――――――――――――――――――――――――――――――――― 5. On the waveform screen, the waveform and results of the calculation are displayed together. ･ The results is automatically recorded on the printer when NOTE print setting is ON. ･ The calculation can be performed as many times as desired on the reading waveform data.
  • Page 99 ――――――――――――――――――――――――――――――――――――――― Details of the various calculations (1) Maximum value (Max) ・The maximum value of the waveform data is shown (in volts). Time to maximum value (Max-Time) ・The time period from the moment that triggering occurred till the maximum value is shown (in seconds). ・If the maximum value is attained twice or more in the data, the first point is took as the maximum value.
  • Page 100 ――――――――――――――――――――――――――――――――――――――― (5) RMS value ・The rms value (in volts) of the waveform data is shown. ・The equation used for the calculation is as follows: RMS value n: number of data samples : the ith data value of the source channel (6) Area value ・The value of the area from the origin position for the waveform (the point corresponding to 0 V) to the signal...

  • Page 101: Memory Recorder Function Possible Recording Time

    ――――――――――――――――――――――――――――――――――――――― 6.8 Memory Recorder Function Possible Recording Time Recording Sampling TIME/DIV time period capability 200 μs/DIV 2.5μs 0.16 s 0.32 s 1 ms/DIV 12.5 0.8 s 1.6 s 62.5 16 s 40 s 1.25 ms 1 min 20 s 2 min 40 s 6.25 6 min 40 s 1 s/DIV...
  • Page 102 ――――――――――――――――――――――――――――――――――――――― ――――――――――――――――――――――――――――――――――― 6.8 Memory Recorder Function Possible Recording Time...

  • Page 103: Chapter 7 Recorder Function Mode

    ――――――――――――――――――――――――――――――――――――――― Chapter 7 Recorder Function Mode 7.1 What is the Recorder Function? 7.1.1 Introduction In this function mode, the input signal is displayed and recorded in real time. (1) Real continuous time recording is possible. (2) Recording can be performed for all input channels along the same time axis.

  • Page 104: Finding Reference Material In This Manual

    ――――――――――――――――――――――――――――――――――――――― (6) There are two display formats to choose from. SINGLE and DUAL of time axis waveform are available. (7) Reprinting is available. The waveform held in memory (the last about 200 DIV including the screen) can be printed as many times as desired.
  • Page 105 ――――――――――――――――――――――――――――――――――――――― (5) A and B cursors operations (Refer to Section 10.1, "Using the A and B Cursors.") The time differences, frequencies, and voltage differences getting as digital value can be readout on the waveform screen. (6) Waveform scrolling function (Refer to Section 10.2, "Waveform Scrolling.") The waveform can be scrolled vertically and horizontally.

  • Page 106: Display Screens

    ――――――――――――――――――――――――――――――――――――――― 7.2 Display Screens (1) Status screen Function Memory, Record, RMS, Select function. XY CONT, System Set the chart speed. Time axis range 200, 500 ms/DIV, 1 s/DIV (display only) Set the time for 1 scale 2, 5, 10, 30 s/DIV (1 DIV).
  • Page 107 ――――――――――――――――――――――――――――――――――――――― Display information for Channel SETTING, UP & LOW information the input setting or upper and lower limit value on the waveform screen. OFF, ON Select whether display Waveform display waveforms or not. Set the voltage axis Voltage axis 20, 50, 100, 200, 500 mV/DIV range range for each channel.
  • Page 108 ――――――――――――――――――――――――――――――――――――――― (2) Waveform screen (Ch 1) (Ch 2) Memory, Record, RMS, Select function. Function XY CONT, System Select whether to stop Trigger mode SINGLE, REPEAT after a single recording, or carry out repeated recording. Set the internal trigger. Internal trigger OFF, LEV, OUT, LOG Time axis range 200, 500 ms/DIV, 1 s/DIV...
  • Page 109 ――――――――――――――――――――――――――――――――――――――― ×4, ×2, ×1, ×1/2 Set the magnification Magnification/ compression ratio along the voltage ratio along the axis for each channel. voltage axis -0.4 to 6.4 DIV Set the position for each Position (magnification ratio: ×1) channel. With the level meter function, the level of the analog NOTE input signal is displayed on the waveform screen during waiting for the trigger.
  • Page 110 ――――――――――――――――――――――――――――――――――――――― (3) Trigger screen Memory, Record, RMS, Select function. Function XY CONT, System Trigger source AND, OR Set whether the triggers AND/OR are AND or OR. OFF, LEVEL, OUT, Set the internal trigger. Internal trigger LOGIC Using of the external External trigger OFF, ON input as a trigger source...

  • Page 111: Basic Operational Procedures

    ――――――――――――――――――――――――――――――――――――――― 7.3 Basic Operational Procedures 7.3.1 Operational Flow The flowchart below illustrates the sequence of operations involved in using the recorder function. Start Turn the power ON Connect the inputs Status (stts) screen Function setting Set to the Recorder function mode. Set the time axis range (time) Set the chart speed.
  • Page 112 ――――――――――――――――――――――――――――――――――――――― Set whether measurement data Set printer output form (prt kind) will be sent to the printer as a waveform or as numerical values. Set whether printing will occur Set the auto-print function simultaneously with screen display or not . Set the channels for which display Settings relating to the inputs and recording will be performed.

  • Page 113: Example Of Operation

    ――――――――――――――――――――――――――――――――――――――― 7.3.2 Example of Operation This example illustrates the procedure connecting the 8804 to an oscillator to measure and record a 8 Vp-p 1 Hz sine wave input. (1) Turn on the power. Turn on the power switch of the 8804.
  • Page 114 ――――――――――――――――――――――――――――――――――――――― (5) Set the time axis range. 1. Press the key to display MENU/WAVE the waveform screen. 2. Using the CURSOR keys and ＋ − keys, set the time axis magnification/compression to " ". ×1 (6) Begin measurement. Press the key.

  • Page 115: Chapter 8 Rms Recorder Function Mode

    (1) Real time continuous recording is possible. (2) The 8804 is designed to measure commercial power supplies (50/60 Hz) and DC signal. The chart speed (time axis scale) can be set to any of 9 levels, from 5 s/DIV to 1 h/DIV.

  • Page 116: Finding Reference Material In This Manual

    ――――――――――――――――――――――――――――――――――――――― (5) Magnified and compressed display and recording are available, both along the time axis and along the voltage axis. Along the time ×1, ×1/2, ×1/5, ×1/10, ×1/20, ×1/50 axis Along the voltage ×4, ×2, ×1, ×1/2 axis (6) Partial printing is available. From a recorded waveform, it is possible to extract and print only the section desired.
  • Page 117 ――――――――――――――――――――――――――――――――――――――― (3) Printing function (Refer to Section 5.4, "Printer Operations.") There are two styles for recording; waveform (WAVE) and numerical values (LOGGING). There are four methods of printing; manual printing, partial printing, auto-printing, and screen copy printing. (4) Zero adjustment function (Refer to Section 5.5, "Zero Adjustment.") This function provides for accurate adjustment of the waveform to the origin position when a zero voltage is...
  • Page 118 ――――――――――――――――――――――――――――――――――――――― (10) Scaling function (Refer to Section 12.4.1, "Scaling Function.") The scaling function allows the units and numerical values for the input voltages to be converted, so that they can be directly read out as physical values. (11) Comment input function (Refer to Section 12.3.9, "Appending Comments.") Instead of making handwritten memos on recordings, comments can be input and printed on.

  • Page 119: Display Screens

    ――――――――――――――――――――――――――――――――――――――― 8.2 Display Screens (1) Status screen Select function. Function Memory, Record, RMS, XY CONT, System 5, 10, 30 s/DIV   Set the chart speed. Time axis range 1, 2, 5, 10, 30 min/DIV   Set the time for 1 scale. 1 h/DIV (1 DIV) The length of recording...
  • Page 120 ――――――――――――――――――――――――――――――――――――――― OFF, ON Printouts Auto print simultaneously with the waveform display. Channel SETTING, UP & LOW Display information of information the input setting or upper and lower limit value on the waveform screen. Select whether display Waveform OFF, ON display waveforms or not.
  • Page 121 ――――――――――――――――――――――――――――――――――――――― (2) Waveform screen Memory, Record, RMS, Select function. Function XY CONT, System SINGLE, REPEAT Select whether to stop Trigger mode after a single recording, or carry out repeated recording. Set the internal trigger. Internal trigger OFF, LOG, RMS 5, 10, 30 s/DIV   Set the chart speed.
  • Page 122 ――――――――――――――――――――――――――――――――――――――― (3) Trigger screen Memory, Record, RMS, Select function. Function XY CONT, System Trigger source AND, OR Set whether the triggers AND/OR are AND or OR. OFF, LOGIC, RMS Set the internal trigger. Internal trigger Using of the external External trigger OFF, ON input as a trigger source is possible.

  • Page 123: Basic Operational Procedures

    ――――――――――――――――――――――――――――――――――――――― 8.3 Basic Operational Procedures 8.3.1 Operational Flow The flowchart below illustrates the sequence of operations involved in using the recorder function. Start Turn the power ON Connect the inputs Status (stts) screen Set to the RMS recorder function Function setting mode.
  • Page 124 ――――――――――――――――――――――――――――――――――――――― Set whether measurement data Set printer output form will be sent to the printer as a (prt kind) waveform or as numerical values. Set whether printing will occur Set the auto-print function simultaneously with screen display or not. Set the channels for which display Settings relating to the inputs and recording will be performed.

  • Page 125: Example Of Operation

    ――――――――――――――――――――――――――――――――――――――― 8.3.2 Example of Operation This example illustrates the procedure connecting the 8804 to an oscillator to measure and record a 8 Vp-p 60 Hz sine wave input. (1) Turn on the power Turn on the power switch on the 8804.
  • Page 126 ――――――――――――――――――――――――――――――――――――――― (5) Set the time axis range. 1. Press the key to display MENU/WAVE the waveform screen. 2. Using the CURSOR keys and ＋ − keys, set to " ". ×1 (6) Begin measurement Press the key. The LED above the key will light up START and then the measurement starts.
  • Page 127 ――――――――――――――――――――――――――――――――――――――― (8) Print out Press the key. The manual print as the figure PRINT below is recorded. The rms value of the 8 Vp-p sine wave is: 8 Vp-p/2 ≒ 2.83 V The above diagram was actually recorded at 2.83 V. Input signal 60 Hz sine wave (recording in the Memory recorder function) ―――――――――――――――――――――――――――――――――――...
  • Page 128 ――――――――――――――――――――――――――――――――――――――― ――――――――――――――――――――――――――――――――――― 8.3 Basic Operational Procedures...

  • Page 129: What Is The X-Y Cont Recorder Function

    ――――――――――――――――――――――――――――――――――――――― Chapter 9 X-Y CONT Recorder Function 9.1 What is the X-Y CONT Recorder Function? 9.1.1 Introduction This function allows a X-Y plot between channels 1 and 2 in real time. (1) The same operation as a normal recorder is available to plot between channels 1 and 2 (real time X-Y recording).

  • Page 130: Finding Reference Material In This Manual

    ――――――――――――――――――――――――――――――――――――――― (6) Unlimited recording time There is no limit on the length of a recording because basically the operation is the same as that of a conventional recorder. (7) Superimposition function When the waveform clear is OFF, waveforms can be superimposed.
  • Page 131 ――――――――――――――――――――――――――――――――――――――― (6) Channel information function. (Refer to Section 5.2, "Basic Setting Items of Each Function"-(8).) (7) Trigger function. (Refer to Chapter 11, "Trigger Function.") Level trigger, window-out trigger, and logic trigger can be used as the internal trigger. (8) Scaling function. (Refer to Section 12.4.1, "Scaling Function.") The scaling function allows the numerical values and units for the input voltages to be converted, so that they...

  • Page 132: Display Screens

    ――――――――――――――――――――――――――――――――――――――― 9.2 Display Screens (1) Status screen Function Memory, Record, RMS, Select function. XY CONT, System The waveforms are Waveform clear OFF, ON superimposed on the existing one with setting OFF. Set whether or not Line style DOT, LINE linear interpolation is performed.
  • Page 133 ――――――――――――――――――――――――――――――――――――――― Set the position for each Position -0.4 to 6.4 DIV (magnification ratio; ×1) channel. Set the low-pass filters Filter OFF, 500 Hz, 5 Hz to restrict the frequency bands. Performs the zero Zero adjustment 0 adjust adjustment. (2) Waveform screen Function Memory, Record, RMS, Selects function.
  • Page 134 ――――――――――――――――――――――――――――――――――――――― Unlike the Memory recorder function, even if the setting NOTE is changed after the measurement completes, the waveform display is not changed. (3) Trigger screen Select function. Function Memory, Record, RMS, XY CONT, System AND, OR Set whether the triggers Trigger source AND/OR are AND or OR.

  • Page 135: Basic Operational Procedures 113

    ――――――――――――――――――――――――――――――――――――――― 9.3 Basic Operational Procedures 9.3.1 Operational Flow The flowchart below illustrates the sequence of operations involved in using the X-Y CONT recorder function. Start Turn the power ON Connect the inputs Status (stts) screen Set to the X-Y CONT recorder Function setting function mode.
  • Page 136 ――――――――――――――――――――――――――――――――――――――― Make the settings such as the Settings relating to the inputs voltage axis range and filters. Trigger (trig) screen Set the trigger source, the trigger Set the trigger conditions type and conditions. Press the key and start START Measurement measurement.

  • Page 137: Example Of Operation

    8 Vp-p, 1 Hz sine wave against a 8 Vp-p, 2 Hz sine wave. (1) Turn on the power. Turn on the power switch on the 8804. (2) Connect the input. Channel 1 (X axis): Output voltage 8 Vp-p...
  • Page 138 ――――――――――――――――――――――――――――――――――――――― (4) Set the trigger screen. 1. Press the key to display MENU/WAVE the trigger screen. 2. Using the CURSOR keys and ＋ − keys, set as same as the setting on the figure left. Trigger Screen (5) Begin measurement. Press the key. The LED above the key will light START...

  • Page 139: Chapter 10 Applications

    ――――――――――――――――――――――――――――――――――――――― Chapter 10 Applications 10.1 Using the A and B Cursors (All Functions) The A and B cursors can be used to measure time differences, frequencies, or voltage differences getting a direct digital readout on the waveform screen. When the partial printing, partial X-Y plot, or numerical calculation is performed, using the vertical or cross cursors, the range can be set.
  • Page 140 ――――――――――――――――――――――――――――――――――――――― A value B-A value Time axis waveform Time axis waveform Line cursor (Vertical cursor) t: time from the t: time difference trigger point between the A and 1/t: the frequency, B cursors taking t as the 1/t: the frequency, period taking t as the X-Y plot waveforms...
  • Page 141 ――――――――――――――――――――――――――――――――――――――― 3. Using the CURSOR keys, move the flashing cursor to the right. Then using the keys, select the cursor to ＋ − be moved. Selection Display A cursor only and move. Display A and B cursors and move A or B the A cursor.
  • Page 142 ――――――――――――――――――――――――――――――――――――――― 5. Press the key. The SHIFT SHIFT indication appears on the waveform screen. 6. By pressing the CURSOR keys, the line cursors and cross cursor will move. t and 1/t, and v, are derived according to the position of the cursor.

  • Page 143: Waveform Scrolling

    ――――――――――――――――――――――――――――――――――――――― 10.2 Waveform Scrolling In Memory recorder, Recorder, and RMS recorder function, the waveform can be scrolled vertically and horizontally on the screen display. Method (on the waveform screen) (1) Horizontal scrolling 1. Press the key. The SHIFT SHIFT indication appears on the waveform screen.
  • Page 144 ――――――――――――――――――――――――――――――――――――――― (2) Vertical scrolling 1. Move the flashing cursor to pos. 2. If the key is pressed, the ＋ Flashing cursor waveform will be scrolled to the upper direction. If the key is − pressed, the waveform will be scrolled to the lower direction. Waveform Screen (Refer to Section 5.2, "Basic Setting Items of Each Function- (13) "Position.")

  • Page 145: Chapter 11 Trigger Function

    Triggering occurs when the EXT TRIG terminals are shorted, or when the input voltage drops below about 2.5 V. This is used for synchronization to other apparatus. This is also used for operation of several 8804 units synchronized in parallel. Timer trigger [ timer ] The timer trigger occurs between predetermined times for starting and stopping operation.
  • Page 146 ――――――――――――――――――――――――――――――――――――――― (3) The trigger can be selected to be either the logical AND or the logical OR combination of these trigger sources described in AND: Triggering occurs only if all of the trigger conditions hold. Triggering occurs if any one of the trigger conditions holds.

  • Page 147: Internal Trigger

    ――――――――――――――――――――――――――――――――――――――― 11.2 Internal Trigger ・Using the analog input and logic inputs as the basis of trigger signals, set the trigger. ・The analog channel 1 and the logic channel A, or the analog channel 2 and the logic channel B can not be used simultaneously as the trigger source.

  • Page 148: Setting The Trigger Types

    ――――――――――――――――――――――――――――――――――――――― 11.3 Setting the Trigger Types The following trigger types are available: Using the analog input Level trigger signal Window-out trigger Voltage dip trigger (Memory recorder only) RMS level trigger (RMS recorder only) Using the logic input signal Logic triggers The function and the trigger to be set: Memory recorder Recorder...

  • Page 149: Level Trigger

    ――――――――――――――――――――――――――――――――――――――― 11.3.1 Level Trigger This trigger occurs when the input signal crosses a predetermined voltage level in a particular direction ("slope": Trigger Trigger Trigger level Input signal Trigger level Input signal ） Upward trigger direction（ Downward trigger direction（ ） The trigger filter ・When using the trigger filter, trigger only occurs when the trigger conditions have been satisfied over an interval equal to the filter width.
  • Page 150 ――――――――――――――――――――――――――――――――――――――― Method (on the trigger screen and waveform screen) This example illustrates settings for channel 1 (A).  The channel 2 (B) is also set in the same manner. Using the CURSOR keys, move the flashing cursor to the items designated by the numbers in the figure and make the settings.

  • Page 151: Window-Out Trigger

    ――――――――――――――――――――――――――――――――――――――― Example： In order to cause trigger at point A or B of 2 Vp-p sine wave as shown in the figure below, the following settings are made: Point A ..Trigger level 0.5 V, trigger direction (slope) rising. ( ) Point B ..
  • Page 152 ――――――――――――――――――――――――――――――――――――――― Method (on the trigger screen and waveform screen) This example illustrates settings for channel 1 (A). The channel 2 (B) can be set in the same manner. Using the CURSOR keys, move the flashing cursor in the order indicated by the numbers in the figure, and make the settings.

  • Page 153: Logic Trigger

    ――――――――――――――――――――――――――――――――――――――― Example: In order to cause trigger when the signal as shown in the figure below leaves the hatched area, the following settings are made: [Window-out trigger] Upper limit value 1.5 V Lower limit value -1.5 V Trigger point 3.0 V Upper limit 1.5 V Lower limit -1.5 V -3.0 V...
  • Page 154 ――――――――――――――――――――――――――――――――――――――― Method (on the trigger screen and waveform screen) This example illustrates settings for channel A. The channel 2 B is set in the same manner. Using the CURSOR keys, move the flashing cursor, and make the settings. 1. Set the trigger type: Select "...
  • Page 155 ――――――――――――――――――――――――――――――――――――――― Selection Trigger occurs if any one of the logic input signals conforms to the trigger pattern. Trigger only occurs if all of the logic input signals conforms to the trigger pattern. In the following cases, if setting to the OR logical operator NOTE for the trigger pattern, trigger will not occur, even if any one of the logic input signals conforms to the trigger...
  • Page 156 ――――――――――――――――――――――――――――――――――――――― Logic Trigger Example (1) If the trigger pattern has CHA1 1 been set to "10 × ×" CHA2 0 with the operator OR, then trigger occurs as CHA3 × shown in the figure right. CHA4 × (2) If the trigger pattern has CHA1 1 been set to "10 ×...

  • Page 157: Voltage Dip Trigger (Memory Recorder Function)

    ――――――――――――――――――――――――――――――――――――――― 11.3.4 Voltage Dip Trigger (Memory Recorder Function) ・The 8804 is designed to measure commercial power supplies (50/60 Hz). ・This unit detects momentary voltage drops in commercial power supplies. ・When the peak of the voltage falls lower than the setting level, the trigger will occur.
  • Page 158 ――――――――――――――――――――――――――――――――――――――― Method (on the trigger screen and waveform screen) This example illustrates settings for channel 1. The channel 2 is set in the same manner. Using the CURSOR keys, move the flashing cursor in the order which indicated by the numbers in the figure below, and set.
  • Page 159 ――――――――――――――――――――――――――――――――――――――― ･ On the waveform screen, the rms value is not displayed. NOTE ･ If the time axis range is less than 50 ms/DIV, this trigger will not occur. ･ The trigger levels of upper and lower limit can not be set separately.

  • Page 160: Rms Level Trigger (Rms Recorder Function)

    ――――――――――――――――――――――――――――――――――――――― 11.3.5 RMS Level Trigger (RMS recorder function) This trigger occurs when the input signal crosses a predetermined trigger level (rms value) in a particular direction ("slope": or ). The commercial power supplies, 50/60 Hz can be measured. Trigger point Trigger point Input signal Rms value...
  • Page 161 ――――――――――――――――――――――――――――――――――――――― 3. Set the trigger direction (slope): Make the setting by using the ＋ 1 2 3 keys. − Waveform Screen Selection Trigger will occur when the input signal crosses the threshold value (the trigger level) from below going upwards. Trigger will occur when the input signal crosses the threshold value (the trigger level) from above going downwards.

  • Page 162: External Trigger

    ――――――――――――――――――――――――――――――――――――――― 11.4 External Trigger To avoid damage to the unit, do not input a voltage WARNING exceeding -5 V to +10 V to the EXT TRIG terminal. ・It is possible to use an external input as a trigger source. ・External trigger is performed either by shorting out the EXT TRIG terminal, or by the supplied signal falling to less than about 2.5 V.
  • Page 163 470 Ω 2200 pF EXT TRIG terminal TRIG OUT terminal Flashing cursor The external trigger facility can be used to synchronize a number of the 8804 units for parallel operation. EXT TRIG terminal TRIG OUT terminal Set the EXT TRIG ―――――――――――――――――――――――――――――――――――...

  • Page 164: Internal And External Trigger Logical Operator

    ――――――――――――――――――――――――――――――――――――――― 11.5 Internal and External Trigger Logical Operator AND/OR is set according to the conditions of internal and external triggers. Method (on the trigger screen) 1. Using the CURSOR keys, move the flashing cursor to trig source. 2. Select the desired logical operator AND or OR by using the ＋...
  • Page 165 ――――――――――――――――――――――――――――――――――――――― Example If the settings are made as follows, then trigger occurs depending on the AND/OR setting. level slope filter (flt) channel 1, A: LEVEL 0.00 V level slope filter (flt) channel 2, B: LEVEL 0.00 V AND Setting Trigger point Channel 1 signal input Channel 2 signal input The trigger conditions...

  • Page 166: Trigger Modes (Memory, Recorder, Rms Recorder Function)

    ――――――――――――――――――――――――――――――――――――――― 11.6 Trigger Modes (Memory, Recorder, RMS Recorder Function) ・Except in the X-Y CONT recorder function, the trigger mode setting can be made. ・It determines whether or not the trigger is repeatedly accepted and the recording is continued after the recording operation has terminated.

  • Page 167: Pre-Trigger ( Memory, Rms Recorder Function)

    ――――――――――――――――――――――――――――――――――――――― 11.7 Pre-Trigger ( Memory, Rms Recorder Function) Not only the waveform after the trigger but also before the trigger can be recorded. The moment the trigger occur, the time related to the waveform being recorded can be set. If all the trigger sources are disabled (OFF), pre-trigger setting cannot be performed.
  • Page 168 ――――――――――――――――――――――――――――――――――――――― (1) In the Memory recorder function Example         recording range (recording length)   Trigger point ［95%］: 95% of the recording in the recording length is before the trigger ［50%］: 50% before and 50% after the trigger ［5%］: 95% of the recording after the trigger ［-95%］:...
  • Page 169 ――――――――――――――――――――――――――――――――――――――― (2) RMS recorder function Example         recording range (recording length) Trigger point  20 DIV ［0 DIV］: Does not record the waveform before the trigger 5 DIV ［5 DIV］: 5 DIV of the recording before the trigger 10 DIV ［10 DIV］: 10 DIV of the recording before the trigger...
  • Page 170 ――――――――――――――――――――――――――――――――――――――― Method (on the trigger screen) 1. Using the CURSOR keys, move the flashing cursor to pre-trig. 2. Set by using the keys. ＋ − Flashing cursor Selection Memory recorder 0, 5, 10, 25, 50, 75, 90, 95, 100, -95% RMS recorder 0, 5, 10 DIV ･...
  • Page 171 ――――――――――――――――――――――――――――――――――――――― Example: When the pre-trigger is set to 95% … recording range (recording length) Start Input waveform In this interval triggering is not accepted Input waveform Not accepted as a trigger ――――――――――――――――――――――――――――――――――― 11.7 Pre-Trigger ( Memory, Rms Recorder Function)

  • Page 172: Trigger Timing

    ――――――――――――――――――――――――――――――――――――――― 11.8 Trigger Timing ・The trigger timing setting refers to which of the start and stop events are controlled by the trigger. ・Not only the waveform after the trigger but also before the trigger can be recorded. ・The trigger timing can be set only in the Recorder and X-Y CONT recorder function.

  • Page 173: Timer Trigger

    ――――――――――――――――――――――――――――――――――――――― 11.9 Timer Trigger ・This is used when recording at a predetermined time is required. ・Triggering occurs regularly from the set start time instant until the stop time instant at constant time intervals. Start time Time interval Stop time Trigger Trigger Trigger Trigger...
  • Page 174 ――――――――――――――――――――――――――――――――――――――― ･ Because triggers are not accepted while capturing data, NOTE care must be taken over the time interval setting. ･ The start time and the stop time must be after the START key is pressed. ･ When the trigger mode is SINGLE, regardless of the setting for the time interval, triggering occurs only once at the start time.

  • Page 175: Level Meter Function

    ――――――――――――――――――――――――――――――――――――――― 11.10 Level Meter Function ・When waiting for the trigger, the level of the analog input signal is displayed on the waveform screen. Use this function for the simple checking of the input signal. ・This function makes it possible to make the settings for the voltage axes, the magnification/compression ratios, and the origin positions while monitoring the levels of the input waveform in real time.

  • Page 176: Trigger Output Terminal

    WARNING exceeding -20 V to + 30 V to the TRIG OUT terminal. The trigger output signal is taken from the TRIG OUT terminal on the lower side of the 8804. TRIG OUT terminal Output Circuit Diagram Open collector output,...

  • Page 177: Chapter 12 System Screen

    ――――――――――――――――――――――――――――――――――――――― Chapter 12  System Screen 12.1 What is the System Screen? ･ The various settings, such as time setting, comment input, and scaling function, can be made. ･ Move the flashing cursor to the function item. Select SYSTEM by using the keys, and the SYSTEM ＋...
  • Page 178 ――――――――――――――――――――――――――――――――――――――― System screen (page 2) (1) Scaling setting (2) Saving, reading and deleting the setting condition (3) Self check ROM/RAM check PRINTER check  KEY/LED check LCD check ――――――――――――――――――――――――――――――――――― 12.1 What is the System Screen?

  • Page 179: Input Level Monitor Function (Input Level Monitor Screen)

    ――――――――――――――――――――――――――――――――――――――― 12.2 Input Level Monitor Function (Input Level Monitor Screen) ･ This function makes it possible to make the settings for the voltage axis, the magnification/compression ratios, and the origin positions while monitoring the levels of the input waveforms in real time. ･...

  • Page 180: Settings On The System Screen (Page 1)

    ――――――――――――――――――――――――――――――――――――――― 12.3 Settings on the System Screen (Page 1) The following functions are available. Grid type selection (refer to 12.3.1) Time value display (refer to 12.3.2) Listing and gauge functions (refer to 12.3.3) Intermittent printing (refer to 12.3.4) Starting status back up function (refer to 12.3.5) Printing intensity adjustment (refer to 12.3.6) Screen contrast adjustment (refer to 12.3.7) Language display setting (refer to 12.3.8)

  • Page 181: Setting The Grid

    ――――――――――――――――――――――――――――――――――――――― 12.3.1 Setting the Grid ･ The types of grid shown on the display screen or printed recordings can be selected. ･ There are three settings: OFF, STANDARD, FINE. Method (page 1) Using the CURSOR keys, move the flashing cursor to grid, then make the setting by using the keys.

  • Page 182: Time Value Display

    ――――――――――――――――――――――――――――――――――――――― 12.3.2 Time Value Display The time from the trigger-point is printed out on the recording paper. Method (page 1) Using the CURSOR keys, move the flashing cursor to time axis, then select by using the keys. ＋ − Selection Display the time from the trigger point (Memory recorder).

  • Page 183: Listing And Gauge Functions

    ――――――――――――――――――――――――――――――――――――――― 12.3.3 Listing and Gauge Functions When a waveform is printed out (except for screen copy), gauges showing the voltage axis scales can be printed at the beginning, and a listing of settings and other information can be printed at the end. Method (page 1) Using the CURSOR keys, move the flashing cursor to list &...

  • Page 184: Intermittent Printing

    ――――――――――――――――――――――――――――――――――――――― 12.3.4 Intermittent Printing ･ When the time axis waveform is displayed as black area, this function reduces the printing frequency, by printing intermittently. ･ This reduces the likelihood of reduced printing speed or excessive power consumption when operating the unit by using the batteries.

  • Page 185: Starting Status Backup Function

    (while the LED above the key is illuminated), and START then the power supply is restored so that the 8804 goes back to the start condition, recording starts immediately. If the triggering function is being used, the unit enters the trigger stand by state.

  • Page 186: Screen Contrast Adjustment

    ――――――――――――――――――――――――――――――――――――――― 12.3.7 Screen Contrast Adjustment The screen contrast can be adjusted. Method (page 1) Using the CURSOR keys, move the flashing cursor to contrast. Then select by using the keys. ＋ − Selection 1 to 16 The intensity increases at the higher values. Pressing the key simultaneously with the ＋...

  • Page 187: Appending Comments

    ――――――――――――――――――――――――――――――――――――――― 12.3.9 Appending Comments A comment of up to 12 characters for each channel can be included on the printed recording. If a comment is input, it will be included on the printed recording in all function modes. Method (page 1) 1.

  • Page 188: Setting The Clock

    ――――――――――――――――――――――――――――――――――――――― 12.3.10 Setting the Clock ･ The 8804 real time clock includes a calendar with automatic leap year discrimination, and a twenty-four hour clock. ･ The current date and time (year, month, day, hours, minutes, seconds) are shown on the status, trigger, and system screens.

  • Page 189: Settings On The System Screen (Page 2)

    ――――――――――――――――――――――――――――――――――――――― 12.4 Settings on the System Screen (Page 2) The settings on page 2 of the system screen include scaling function, saving, reading, and deleting the setting condition, and a self check function. Scaling Function (Refer to 12.4.1.) Saving, Reading, and Deleting the Setting Condition (Refer to 12.4.2.) Self Check (Refer to 12.4.3.)
  • Page 190 ――――――――――――――――――――――――――――――――――――――― Method (on the SYSTEM screen (page 2)) 1. Using the CURSOR keys, move the Flashing cursor flashing cursor to scaling. Then select whether or not perform scaling by using the keys. ＋ − Selection No scaling Scaling is performed indicating the exponent in integer.
  • Page 191 ――――――――――――――――――――――――――――――――――――――― Example: Setting the scaling for measurement values produced when using a displacement sensor with characteristics as shown by the graph. Y = 8X - 6 ... (1) (V) (mm) ↓ X(mm) X = 0.125Y + 0.75 ... (2) (mm) Inverting equation (1) results in equation (2).
  • Page 192 ――――――――――――――――――――――――――――――――――――――― When scaling the channel 1 only The scaled values appear as shown on the gauge scales, as range values (the upper and lower limit values along the vertical axis), and as the value of V obtained using the A and B cursors. Scaling OFF Scaling ON (ENG) ―――――――――――――――――――――――――――――――――――...

  • Page 193: Condition

    ――――――――――――――――――――――――――――――――――――――― 12.4.2 Saving, Reading, and Deleting the Setting Condition The setting conditions can be saved, and also be read as required. The setting condition can be saved up to 4. Method (page 2) (1) Saving 1. Using the CURSOR keys, move the flashing cursor to setting.
  • Page 194 ――――――――――――――――――――――――――――――――――――――― (2) Reading 1. Using the CURSOR keys, move the flashing cursor to setting.  Then select " " by using the LOAD ＋ keys. − 2. Select the loading number by using the keys. ＋ − Selection No. 1 to No. 4 3.
  • Page 195 ――――――――――――――――――――――――――――――――――――――― (3) Deleting 1. Using the CURSOR keys, move the flashing cursor to setting. Then select " " by using the ＋ − keys. 2. Select the deleting number by using the keys. ＋ − Selection No. 1 to No. 4 3.

  • Page 196: Self Check

    (4) The LCD check (1) The ROM/RAM check ･ This check tests the internal memory (ROM and RAM) of the 8804. ･ The ROM/RAM check does not affect the contents of the RAM. ･ The result is displayed on the screen (OK means passed and NG means failed.)
  • Page 197 START KEY/LED check screen will appear. 3. Press any key on the front panel of the 8804, and the corresponding key on the "KEY check" screen will be filled in. When pressing the key, and the LED for START the start will light.
  • Page 198 ――――――――――――――――――――――――――――――――――――――― (3) PRINTER check This check tests printer operation. Method (page 2) 1. Using the CURSOR keys, move the flashing cursor to [3] PRINTER check. 2. Press the key, and the printer check will be START performed. To stop the printer check during execution, press the key.
  • Page 199 ――――――――――――――――――――――――――――――――――――――― (4) LCD check ･ This checks the display screen. ･ There are three test patterns: MATRIX, OVERLAP, and CHARACTER. Method (page 2) 1. Using the CURSOR keys, move the flashing cursor to [4] LCD check. 2. Press the key, and the MATRIX check will be START performed.
  • Page 200 ――――――――――――――――――――――――――――――――――――――― ――――――――――――――――――――――――――――――――――― 12.4 Settings on the System Screen (Page 2)

  • Page 201: Chapter 13 Input Units

    Chapter 13 Input Units 13.1 Analog Inputs The 8804 has an internal analog input unit, which can record a maximum of 2 channels of analog signals. This section describes the analog unit and input cables. Be sure to read the Section 13.3, "Safety Requirements"...

  • Page 202: Specifications

    ――――――――――――――――――――――――――――――――――――――― 13.2 Specifications Accuracy at 23℃±5℃, after 30 minutes of warm-up Accuracy guaranteed for six months. 20 mV/DIV to 100 V/DIV 1-2-5 step Measurement ranges (120 mV to 600 V f.s.) 20 mV/DIV to 50 V/DIV 1-2-5 step (120 mVrms to 300 Vrms f.s.) RMS recorder only Maximum input voltage 500 V (DC + AC peak)

  • Page 203: Safety Requirements

    Be sure to use the specified 9574 INPUT CORD. The maximum floating voltage between the analog inputs and the frame of the 8804, or between the analog inputs channels 1 and 2 is 450 V AC/DC. To avoid the danger of electric shock or damage to the equipment, ensure that the applied voltage never exceeds the maximum floating voltage.
  • Page 204 ――――――――――――――――――――――――――――――――――――――― Ｈ Maximum input voltage: Analog 8804 unit 500 V DC+AC peak input  Ｌ Maximum floating voltage: 450 V DC/AC max When making measurements on an AC power line for NOTE example, using a voltage transformer, ensure that the transformer is appropriately grounded.

  • Page 205: Input Cables

    ――――――――――――――――――――――――――――――――――――――― 13.4 Input Cables ･ For safety reasons, only use the 9574 INPUT CORD for connection to the analog input units. ･ The cables are approximately 1.7 m long, and the portion which plugs into the unit has a plastic cover for added safety.

  • Page 206: Measurement Errors Caused By Signal

    ――――――――――――――――――――――――――――――――――――――― 13.5 Measurement Errors Caused by Signal Source Internal Resistance This problem only arises if the internal resistance of the signal source is not sufficiently low compared to the internal resistance of the analog input unit. If it is high, it can lead to measurement errors.

  • Page 207: Logic Inputs

    ――――――――――――――――――――――――――――――――――――――― 13.6 Logic Inputs The 8804 has an internal logic input unit, which can record a maximum of 8 channels of logic signals. For operation details, refer to Section 5.2, "Basic Setting Items of Each Function" and Chapter 11, "Trigger Function."...

  • Page 208: Logic Probe

    ――――――――――――――――――――――――――――――――――――――― 13.6.2 Logic Probe (1) Using the 9306 LOGIC PROBE The 8804 allows a maximum of two 9306 units to be WARNING connected, but in this case the units have a common ground. Read the Instruction Manual for the 9306 carefully.
  • Page 209 ――――――――――――――――――――――――――――――――――――――― 9306 LOGIC PROBE Clip Leads (Digital input) Alligator Clip Leads (Contact input) (2) Using the 9307 LINE LOGIC PROBE Insulation is provided in the probes between the WARNING input and output, and between channels. To avoid the danger of electric shock or damage to the equipment, ensure that the applied voltage never exceeds the maximum floating voltage.
  • Page 210 ――――――――――――――――――――――――――――――――――――――― Specifications 4 (isolated) The number of channels Input voltage range HIGH Input resistance Approx. 30 kΩ Approx. 100 kΩ 60 VAC/20 VDC ≦ H 170 VAC/70 VDC ≦ H Threshold value 10 VAC/15 VDC ≧ L  30 VAC/43 VDC ≧ L   ...

  • Page 211: Chapter 14 Maintenance And Service

    ――――――――――――――――――――――――――――――――――――――― Chapter 14 Maintenance and Service 14.1 Changing the Battery When using the alkaline batteries and then the following warning message appears, replace the batteries. "WARNING 10: Change all batteries" To avoid electric shock when replacing the WARNING batteries, turn the power switch off and disconnect the input cable before beginning.
  • Page 212 ･ If the 8804 shuts down because the batteries are exhausted, it still continues to consume a very small amount of power. After the shutdown, be sure to turn the power switch off.

  • Page 213: 9420 Battery Pack

    ――――――――――――――――――――――――――――――――――――――― 14.2 9420 BATTERY PACK ･ The 9420 BATTERY PACK is a Ni-Cd battery which can be recharged while in the unit. The three packages form a set to be used together. When replacing the battery pack, always replace all three packages together. ･...
  • Page 214 ･ Before storing the unit, remove the battery pack from the unit. ･ If the 8804 shuts down becuase the batteries are exhausted, it still continues to consume a very small amount of power. After the shutdown, be sure to turn the power switch off and remove the battery pack from the unit.

  • Page 215: Recharging The Battery

    ――――――――――――――――――――――――――――――――――――――― 14.3 Recharging the Battery ･ When using the 9420 BATTERY PACK and the following warning message is displayed, recharge the 9420. "WARNING 10: Change all batteries" ･ If not using the 9418-10 AC ADAPTER(PSA-30U-120, PHIHONG), the recharging is not possible. Method 1.

  • Page 216: Removing The Battery Before Ultimate Disposal

    ――――――――――――――――――――――――――――――――――――――― 14.4 Removing the Battery Before Ultimate Disposal To avoid electric shock when replacing the batteries, WARNING turn the power switch off and disconnect the input cable before beginning.  Keep used batteries out of the reach of children. Dispose CAUTION of used batteries according to their type in the prescribed manner and in the proper location.
  • Page 217 ――――――――――――――――――――――――――――――――――――――― Battery seen from above Wrench up the battery, and cut the positive (+) connection with nippers. Wrench the battery up further. Negative Positive Cut the negative (-) connection, connection connection which was underneath the battery. Circuit board Battery seen from side ―――――――――――――――――――――――――――――――――――...

  • Page 218: Cleaning The Printer Head

    ――――――――――――――――――――――――――――――――――――――― 14.5 Cleaning the Printer Head The maintenance of the printer is not especially required. However, depending upon the conditions of use, and especially if the printer has been used over a long period of time, it is possible for dirt or paper dust to adhere to the printer thermal head, causing the printing to be faint or otherwise indistinct.
  • Page 219 ――――――――――――――――――――――――――――――――――――――― ･ Do not use thinners, or similar organic solvents. NOTE ･ After using alcohol, be sure that the printer is completely dry before operating it. ･ If the printer has been used over a long period of time, it is possible for paper dust to adhere to the roller.

  • Page 220: Troubleshooting

    ――――――――――――――――――――――――――――――――――――――― 14.6 Troubleshooting If the unit is not functioning normally, check the following items before sending it for repair. ・Is the AC Adapter correctly connected? The screen and indicators do not light when powered on. ・Are the batteries correctly inserted? ・Are the batteries near the end of their useful life? ・When the battery capacity is reduced, the...
  • Page 221 ――――――――――――――――――――――――――――――――――――――― ・This is likely to be an aliasing error. During memory recorder operation, the apparent ・Make the "time" setting (time axis range) frequency of the recording is faster. For more details see the back- much lower than the ground information on aliasing distortion in expected frequency.

  • Page 222: Service

    If the unit is not functioning properly, check the "Troubleshooting" list. If a problem is found, contact your dealer or HIOKI representative. Pack the unit carefully so that it will not be damaged during transport, and write a detailed description of the problem. HIOKI cannot bear any responsibility for damage that occurs during shipment.
  • Page 223 ――――――――――――――――――――――――――――――――――――――― Appendices Apendix.1 Background (1) Sampling ・The 8804 converts the input signal analog value into a digital value, and all internal signal processing thereafter is performed using digital values. This A/D conversion process is called sampling. ・This sampling measures the value of the signal repeatedly at constant intervals.
  • Page 224 APPENDIX 2 ――――――――――――――――――――――――――――――――――――――― (2) Aliasing distortion ･ If the frequency of signal being measured is significantly higher than the sampling rate, it is possible for sampling to produce an apparent signal which is actually non- existent. Actual input signal ○ ○...
  • Page 225 APPENDIX 3 ――――――――――――――――――――――――――――――――――――――― (3) Measurement limit frequency ･ As a general rule, to ensure that sampling catches the peaks of a typical sine wave input, 25 samples are required for each input cycle. Sampling point Signal period ――――――――――――――――――――――――――――――――――― Appendices...
  • Page 226 APPENDIX 4 ――――――――――――――――――――――――――――――――――――――― The frequency for each range, when 25 samples per period is taken as the limit. Measurement TIME/DIV Sampling period limit frequency 200 μs/DIV 2.5 μs 16 kHz 400 μs/DIV 5 μs 8 kHz 1 ms/DIV 12.5 μs 3.2 kHz 25 μs 2 ms/DIV...
  • Page 227 APPENDIX 5 ――――――――――――――――――――――――――――――――――――――― Apendix.2 Error Messages The unit produces two levels of message to indicate problems. These are distinguished as follows. Error messages ERROR 1 Reload the printer paper. ERROR 2 Lower the printer lever. Warning messages WARNING 10 Change all batteries. WARNING 11 Invalid key in operation.
  • Page 228 APPENDIX 6 ――――――――――――――――――――――――――――――――――――――― Apendix.3 Glossary The phenomenon of not obtaining an accurate signal Aliasing error waveform, due to aliasing distortion. Refer to Appendix 1, "Background". Used as an abbreviation for channel. "ch 1" means channel 1; "1 ch" means one channel. The frequency for which the output of a filter falls below Cutoff frequency √...
  • Page 229 APPENDIX 7 ――――――――――――――――――――――――――――――――――――――― Apendix.4 Example of Waveforms for Each Function (1) Memory recorder function Single Dual X-Y DOT X-Y LINE ――――――――――――――――――――――――――――――――――― Appendices...
  • Page 230 APPENDIX 8 ――――――――――――――――――――――――――――――――――――――― (2) Recorder function Single Dual ――――――――――――――――――――――――――――――――――― Appendices...
  • Page 231 APPENDIX 9 ――――――――――――――――――――――――――――――――――――――― (3) RMS recorder function Single Dual (4) X-Y CONT recorder function ――――――――――――――――――――――――――――――――――― Appendices...
  • Page 232 APPENDIX 10 ――――――――――――――――――――――――――――――――――――――― ――――――――――――――――――――――――――――――――――― Appendices...
  • Page 233 INDEX 1 ―――――――――――――――――――――――――――――――――――――― Index Comments COPY - A - , 52 Cursor keys A and B cursors Cut off frequency AC adapter Aliasing distortion - D - Aliasing error Alkaline batteries , 189 Analog input Delete Display language 124, 142 AND/OR 124, 142 Area...
  • Page 234 INDEX 2 ―――――――――――――――――――――――――――――――――――――― Low pass filter lower - G - Gauges - M - Grid Manual print function Maximum floating voltage - H - Maximum value Head up Measurement limitation Head up/down lever frequency Memory recorder function - I - MENU/WAVE key , 31 Input cables...
  • Page 235 INDEX 3 ―――――――――――――――――――――――――――――――――――――― scale Scaling - P - Screen contrast Paper end Screen setting Partial print Scrolling partial X-Y plot Self check Peak to Peak Setting condition Peak value Setting item position SINGLE POWER xiii Start , 46 Pre-trigger Starting status backup PRINT Status screen 27, 59, 84,...
  • Page 236 INDEX 4 ―――――――――――――――――――――――――――――――――――――― - U - Unbalance input unit upper - V - Voltage axis range - W - Warning messages Waveform  Waveform clear Waveform screen 27, 61, 86, 99, 111 Window-out trigger word - X - XY CONT recorder function X-Y plot 72, 107 - Z -...

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