Hioki MEMORY HiCORDER 8855 Instruction manual

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MEMORY HiCORDER
HEAD OFFICE
81 Koizumi, Ueda, Nagano 386-1192, Japan
TEL [phone] / FAX [phone]
E-mail: [e-mail]/ URL http://www.hioki.co.jp/
HIOKI USA CORPORATION
6 Corporate Drive, Cranbury, NJ 08512, USA
TEL [phone] / FAX [phone]
8855A987-07 06-11H
Printed on recycled paper
1. 赤部分修正
2. 背表紙幅設定
3. 2 ページめの背表紙の厚さも同じに設
定する。
4. モノクロ、A3 でドキュテック本体に送
付する。

Contents
Introduction i
Inspection ii
Safety Notes iv
Notes on Use vi
Chapter Summary xi
Chapter 1 Product Overview 1
1.1 Major Features 2
1.2 Identification of Controls and Indicators 4
Chapter 2 Installation and Preparation 9
2.1 Installation of the Product 9
2.2 Power Supply and Ground Connections 11
2.2.1 Connecting the AC Power Supply 11
2.2.2 Functional Grounding of the 8855 12
2.3 Power On/Off 13
2.4 Connection of the Input Product 14
2.4.1 8950, 8952, 8953-10, 8955 INPUT UNITs 14
2.4.2 8951 VOLTAGE/CURRENT UNIT 15
2.4.3 8954 VOLTAGE/TEMP UNIT 18
2.5 Logic Probe Connection 20
2.6 9018-10, 9132-10 CLAMP ON PROBE
Connection 21
2.7 9322 DIFFERENTIAL PROBE Connection 22
2.8 9665 10:1 PROBE / 9666 100:1 PROBE 23
2.9 Loading Recording Paper
(when the 8994 PRINTER UNIT is installed) 24
2.10 Care of Recording Paper 26
2.11 Notes on Measurement 27
2.11.1 Maximum Input Voltage 29
2.11.2 Using a Voltage Transformer 30

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 32
3.1.3 Setting the Items 32
3.1.4 Jog/Shuttle Controls and Select Key 33
3.1.5 Basic Input Operation 34
3.2 Measurement Start and Stop Operation 34
3.3 Other Keys Operation 35
3.4 Screen Configuration 36
Chapter 4 Memory Function 37
4.1 Overview of the Memory Function 37
4.2 Operation Sequence (MEM) 39
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 Format 44
4.3.5 Setting the Interpolation (X-Y screen) 46
4.3.6 Synthesis Area (X-Y screen) 46
4.3.7 Setting the Roll Mode 47
4.3.8 Setting the Overlay Function 48
4.3.9 Setting the Averaging Function 50
4.3.10 Using Channels 52
4.4 Using the X-Y Waveform Plots (MEM) 53
4.5 Settings on the Waveform Display Screen (MEM) 55
4.6 Setting the Print Mode 56
4.7 Setting the Auto Print Function 57
4.8 Auto Range Function 58
4.9 Other Screen Settings 60
4.10 Start and Stop Operation (MEM) 61

Chapter 5 Recorder Function 63
5.1 Overview of the Recorder Function 63
5.2 Operation Sequence (REC) 65
5.3 STATUS Settings (REC) 67
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 Format 71
5.3.6 Setting the Interpolation (X-Y screen) 73
5.3.7 Setting the Display Clear Function
(X-Y screen) 73
5.3.8 Setting the Additional Recording Function 74
5.3.9 Setting the Print Mode (only when the
8994 PRINTER UNIT is installed) 76
5.3.10 Setting the Printer Function (Real Time Printing)
(only when the 8994 PRINTER UNIT
is installed) 77
5.4 Using the X-Y CONT Recorder 78
5.4.1 Setting the Status Screen 79
5.4.2 Setting the Channel Screen 80
5.4.3 Setting the Waveform Display Screen 81
5.5 Settings on the Waveform Display Screen (REC) 82
5.6 Start and Stop Operation (REC) 83
Chapter 6 Input Channel Settings 85
6.1 Overview 86
6.2 Operation Procedure (Input Channel Setting) 87
6.3 Setting the CHANNEL Screen 89
6.3.1 Setting the Waveform Display Color 91
6.3.2 Setting Print Density
(When the 8994 PRINTER UNIT is Installed) 92
6.3.3 Setting the Waveform Display Graph Position 92
6.3.4 Setting the Measurement Mode 93
6.3.5 Setting the Voltage Axis Range 94
6.3.6 Setting the Input Coupling 94
6.3.7 Setting the Magnification/
Compression Ratio Along the Voltage Axis 95
6.3.8 Setting the Zero Position 95
6.3.9 Setting the Low-pass Filter 97
6.3.10 Setting the Logic Inputs 98

6.4 Zero Adjustment 101
Chapter 7 Trigger Functions 103
7.1 Overview of the Trigger Functions 103
7.2 Operation Sequence (Trigger mode setting) 104
7.3 TRIGGER Screen Organization 106
7.4 Trigger Mode 107
7.5 Pre-trigger (MEM Function) 108
7.5.1 Setting the Pre-trigger 108
7.5.2 Setting the Trigger Priority 109
7.6 Trigger Timing (REC Function) 110
7.7 Trigger Source AND/OR Linking 111
7.8 Analog Trigger 112
7.8.1 Level Trigger 112
7.8.2 Window Trigger 115
7.8.3 Period Trigger 117
7.8.4 Glitch Trigger Settings 120
7.8.5 Event Trigger 123
7.9 Logic Trigger 126
7.10 External Trigger Function 128
7.11 Timer Trigger Function 129
7.12 Manual Trigger 132
7.13 Trigger Output Terminal 132
Chapter 8 Waveform Display Screen Operation 133
8.1 Scrolling the Waveform 134
8.2 Using the A/B Cursors 135
8.2.1 Using the Line Cursors (Vertical) 136
8.2.2 Using the Line Cursors (Horizontal) 138
8.2.3 Using the Trace Cursors 139
8.2.4 Operating the gauge cursor 141
8.2.5 Using the A/B Cursors (X-Y Screen) 142
8.3 Magnification/compression Ratio Along the
Time Axis 143
8.4 Zoom Function (MEM Function Only) 144
8.5 Input Level Monitor Function 145

Chapter 9 SYSTEM Screen Settings 147
9.1 Overview 147
9.2 SET UP Screen (SYSTEM) 148
9.2.1 Grid Types 148
9.2.2 Comment Display 148
9.2.3 Time Value 149
9.2.4 Automatic Variable Scale 149
9.2.5 Start Backup 149
9.2.6 Backlight Saver 150
9.2.7 Display Color 150
9.2.8 Beep Sound 151
9.2.9 Display Language 151
9.2.10 START Key Operation Conditions 151
9.2.11 Setting External Terminals 152
9.2.12 Setting the SCSI 154
9.2.13 External Control of Internal Devices
(when the 9646, 9663 is installed) 154
9.3 FILE Screen 155
9.3.1 Setting the Auto Save Function 155
9.3.2 Numerical Calculation Settings 158
9.3.3 SAVE Key Settings 158
9.4 PRINTER Screen 159
9.4.1 Setting the Print Mode 159
9.4.2 Auto Print 160
9.4.3 Real Time Print 161
9.4.4 Time Axis Magnification and Compression 161
9.4.5 Print Size 162
9.4.6 Grid Type 162
9.4.7 Channel Marker 162
9.4.8 Time Value 162
9.4.9 List & Gauge 163
9.4.10 Printer Density 163
9.4.11 Upper-lower Values Print 163
9.4.12 Zero Position Comment 163
9.4.13 Counter Print 164
9.4.14 Making Print Settings for Comments 164
9.4.15 Printing Numerical Calculation Results 164
9.4.16 COPY key setting 164
9.4.17 PRINT Key Output Destination 165
9.4.18 Print Selection Upon Execution 165

9.5 INITIALIZE Screen 166
9.5.1 Setting the Clock 166
9.5.2 Clearing the Waveform Data 167
9.5.3 System Reset 167
9.5.4 Menu Control 167
9.6 Self-check 168
9.6.1 ROM/RAM Check 168
9.6.2 Printer Check
(when the 8994 PRINTER UNIT is installed) 168
9.6.3 Display Check 169
9.6.4 Key Check 169
9.6.5 List System Configuration 170
Chapter 10 Storing and Recalling
Measurement Data 171
10.1 Floppy Disk 172
10.2 Optional Units (Option) 173
10.2.1 9646 MO UNIT (Option) 173
10.2.2 9663 HD UNIT 174
10.2.3 Setting the Internal MO/HD
(When the 9646, 9663 is installed) 175
10.3 PC Card 176
10.3.1 Using the PC Card Slot 177
10.4 SCSI Interface 178
10.4.1 SCSI Interface Specifications 178
10.4.2 Setting the MO Disk Drive 179
10.4.3 Setting the SCSI ID 180
10.5 Selecting the Media Type 181
10.6 Initializing (FORMAT) 182
10.7 Saving the Data (SAVE) 183
10.7.1 Setting the Data to Store 185
10.7.2 Text data store example 190
10.8 Loading the Data (LOAD) 192
10.9 File Information (INFO) 199
10.10 Deleting a File (DELETE) 200
10.11 Sorting Files (SORT) 201
10.12 Changing the File Name 202

10.13 Operating the Directory 203
10.13.1 Making a Directory (MK DIR) 203
10.13.2 Changing a Directory (CH DIR) 204
10.13.3 Deleting a Directory (RM DIR) 206
10.14 Copying Files 207
10.15 Printing the File List 208
10.16 SAVE Key Settings (One-touch Save) 209
Chapter 11 External Input/ Output Terminals/
Key Lock Function 217
11.1 External Input/Output Terminals 218
11.1.1 Connecting the Terminals 218
11.1.2 External Trigger Input Terminal [EXT TRIG] 219
11.1.3 Trigger Output Terminal [TRIG OUT] 219
11.1.4 External Sampling Terminal [EXT SMPL] 220
11.1.5 External Start/Stop Terminal 220
11.1.6 GO/NG Evaluation Output Terminal 221
11.1.7 External Output Terminal 222
11.2 Using the Key Lock Function 223
Chapter 12 Specifications 225
12.1 General Specifications 225
12.1.1 Basic Specifications 225
12.1.2 Recorder (8994 PRINTER UNIT:
Optional. Specify upon order) 226
12.1.3 Display 226
12.1.4 Expanded memory (9645, 9645-01
MEMORY BOARD: Optional.Specify upon
order) 227
12.1.5 External Data Storage 227
12.1.6 Interface 228
12.1.7 Others 229
12.2 Memory Function 230
12.3 Recorder Function 231
12.4 Recorder & Memory Function 232
12.5 FFT Function 233
12.6 Trigger Unit 234
12.7 Auxiliary Functions 235
12.8 Others 236
12.9 System Operation 237

12.10 Maximum Recording Length for Time Axis
Settings 238
12.11 Memory Capacity and Recording Length 240
12.12 Waveform Backup 241
Chapter 13 Logic and Analog Inputs 243
13.1 Logic Inputs 243
13.2 Analog Inputs 245
13.2.1 8950 ANALOG UNIT 245
13.2.2 8951 VOLTAGE/CURRENT UNIT 246
13.2.3 8952 DC/RMS UNIT 248
13.2.4 8953-10 HIGH RESOLUTION UNIT 249
13.2.5 8954 VOLTAGE/TEMP UNIT 250
13.2.6 8955 F/V UNIT 252
Chapter 14 Maintenance and Service 255
14.1 Maintenance and Inspection 255
14.2 Replacing the Input Modules 257
14.3 Removing the Battery Before Discarding
the Unit 258
14.4 Troubleshooting 259
Index INDEX 1

i
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Introduction
────────────────────────────────────────────────────
Introduction
Thank you for purchasing the HIOKI "8855 MEMORY HiCORDER." To
obtain maximum performance from the instrument, please read this manual
first, and keep it handy for future reference.
About This Manual
This manual is the Basics edition (Quick Start Manual) for the "8855
MEMORY HiCORDER." It describes the general functions and procedures
needed to use the 8855. For information on advanced functions and
procedures, refer to the Advanced edition (Instruction Manual) of this
manual.

ii
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Inspection
────────────────────────────────────────────────────
Inspection
When you receive the instrument, inspect it carefully to ensure that no
damage occurred during shipping. In particular, check the accessories, panel
switches, and connectors. If damage is evident, or if it fails to operate
according to the specifications, contact your dealer or Hioki representative.
Accessories
Power cord 1
9231 RECORDING PAPER (when the 8994 PRINTER UNIT is installed) 1
Roll paper attachment (when the 8994 PRINTER UNIT is installed) 2
PC card protector 1
Connector cable label 1
Instruction Manual 2
Guide Book 1
Application Disk (CD-R) 1
Options
8950 ANALOG UNIT
8951 VOLTAGE/CURRENT UNIT
8952 DC/RMS UNIT
8953-10 HIGH RESOLUTION UNIT
8954 VOLTAGE/TEMP UNIT
8955 F/V UNIT
8994 PRINTER UNIT
9646 MO UNIT (with eject pin)
9663 HD UNIT
9645 MEMORY BOARD (96 M words) total 128 M words
9645-01 MEMORY BOARD (512 M words) total 512 M words
9557 RS-232C CARD
9558 GP-IB CARD
9626 PC CARD 32M
9627 PC CARD 64M
9726 PC CARD 128M
9727 PC CARD 256M
9728 PC CARD 512M
9729 PC CARD 1G
9397-01 CARRYING CASE (for the 8855)
9231 RECORDING PAPER (6 rolls)
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 (between BNC and banana, female)
9217 CONNECTION CORD (isolated between BNC and BNC)
9327 LOGIC PROBE (maximum input voltage 50 V)
9321-01 LOGIC PROBE (maximum input voltage 250 V)
9665 10:1PROBE
9666 100:1PROBE
9322 DIFFERENTIAL PROBE
9328 POWER CORD (for the 9322)
9325 POWER CORD (for the 8951)

iii
────────────────────────────────────────────────────
Inspection
────────────────────────────────────────────────────
NOTE
220H PAPER WINDER
*9303 PT
9318 CONVERSION CABLE (for the 9270 to 9272, 9277 to 9279)
3273 CLAMP ON PROBE (DC to 50 MHz)
3273-50 CLAMP ON PROBE (DC to 50 MHz)
3274 CLAMP ON PROBE (DC to 10 MHz)
3275 CLAMP ON PROBE (DC to 2 MHz)
3276 CLAMP ON PROBE (DC to 100 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,5Hzto10kHz)
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)
9667 FLEXIBLE CLAMP ON SENSOR
(500 to 5000 A/50 to 500 A, 10 to 20 kHz)
9333 LAN COMMUNICATOR
9335 WAVE PROCESSOR
9549 FUNCTION UP DISK (power monitor function)
*: no CE marking
To connect the 9270 to 9272 or 9277 to 9279 Clamp-On Sensor to the 8951
VOLTAGE/CURRENT UNIT, use the 9318 CONVERSION CABLE. To
connect these sensors to other instruments, use in combination with the 9555
SENSOR UNIT.

iv
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Safety Notes
────────────────────────────────────────────────────
DANGER This instrument is designed to comply with 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 instrument. 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 instrument
defects.
Safety symbols
The symbol printed on the instrument indicates that the user
should refer to a corresponding topic in the manual (marked with
the symbol) before using the relevant function.
In the manual, the symbol indicates particularly important
information that the user should read before using the
instrument.
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.
DANGER Indicates that incorrect operation presents an extreme hazard
that could result in serious injury or death to the user.
WARNING Indicates that incorrect operation presents a significant hazard
that could result in serious injury or death to the user.
CAUTION Indicates that incorrect operation presents a possibility of injury
to the user or damage to the instrument.
NOTE Indicates advisory items related to performance or correct
operation of the instrument.
Safety Notes
This manual contains information and warnings essential for safe operation
of the instrument and for maintaining it in safe operating condition. Before
using the instrument, be sure to carefully read the following safety notes.
The following symbols in this manual indicate the relative importance of
cautions and warnings.

v
────────────────────────────────────────────────────
Safety Notes
────────────────────────────────────────────────────
CAT I Secondary electrical circuits connected to an AC electrical
outlet through a transformer or similar device.
CAT II Primary electrical circuits in equipment connected to an AC
electrical outlet by 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 from the distribution panel to outlets.
CAT IV The circuit from the service drop to the service entrance,
and to the power meter and primary overcurrent protection
device (distribution panel).
f.s. (maximum display value or scale length)
The maximum displayable value or the full length of the scale.
This is usually the maximum value of the currently selected range.
rdg. (reading or displayed value)
The value currently being measured and indicated on the measuring
instrument.
dgt. (resolution)
The smallest displayable unit on a digital measuring instrument, i.e.,
the input value that causes the digital display to show a "1".
Measurement categories (Overvoltage categories)
This instrument complies with CAT II safety requirements.
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.
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.
Accuracy
We define measurement tolerances in terms of f.s. (full scale), rdg. (reading)
and dgt. (digit) values, with the following meanings:

vi
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Notes on Use
────────────────────────────────────────────────────
DANGER Probe Connection, Measurement Voltage Input
Maximum input voltage ratings for the input module and the input
terminals of the instrument are shown below. To avoid the risk of
electric shock and damage to the instrument, take care not to
exceed these ratings.
The maximum rated voltage to earth of the input module
(voltage between input terminals and main instrument frame
ground, and between inputs of other analog input modules) is
shown below. To avoid the risk of electric shock and damage
to the instrument, 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 8950, 8952 or
8953-10, always connect the probe to the secondary side of
the circuit breaker, so the breaker can prevent an accident if a
short circuit occurs. Connection to the primary side involves
the risk of electric shock and damage to the instrument.
Before using the instrument, make sure that the insulation on
the connection cords is undamaged and that no bare
conductors are improperly exposed. Using the products in
such conditions could cause an electric shock, so contact
your dealer or Hioki representative for replacements. (Model
9197, 9198.)
Input/output terminal Maximum input voltage Maximum rated voltage to earth
8950 (input) 400 V DC max. 370 V AC/DC
8951 (input) 30 V rms or 60 V DC 30 V rms or 60 V DC
8952 (input) 400 V DC max. 370 V AC/DC
8953-10 (input) 400 V DC max. 370 V AC/DC
8954 (input) 30 V rms or 60 V DC 370 V AC/DC
8955 (input) 30 V rms or 60 V DC 30 V rms or 60 V DC
9322 2000 V DC, 1000 V AC (CAT
II)
600 V DC/AC (CAT III)
When using grabber clips
1500 V DC/AC (CAT II), 600 V DC/AC (CAT III)
When using alligator clips
1000 V DC/AC (CAT II), 600 V DC/AC (CAT III)
EXT TRIG/ START
STOP/ EXT SMPL -5 to +10 V DC
Not insulated
TRIG OUT/ GO/ NG/
EXT.OUT
-20 V to +30 V DC
500 mA max./ 200 mW max.
Notes on Use
Follow these precautions to ensure safe operation and to obtain the full
benefits of the various functions.

vii
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Notes on Use
────────────────────────────────────────────────────
DANGER External I/O terminal connections
A common GND is used for the external I/O terminals (START,
STOP, GO, NG, EXT_OUT, EXT_TRIG, EXT_OUT, and EXT_SMPL
terminals) and the 8855 instrument. The terminals are not
isolated. To prevent damage to the object connected to the
external I/O terminals and the 8855 instrument, wire the
terminals so that there is no difference in electrical potential
between the GND for the external I/O terminals and the GND for
the connected object.
Logic Probe Connection
The logic input and 8855 instrument share a common ground.
Therefore, if power is supplied to the measurement object of the
logic probe and to the 8855 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
8855 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 8855 using the
supplied power cord.
(2) Before connecting the logic probe to the measurement
object, connect the ground of the measurement object to the
8855 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.
Differential Probe Connection
When using grabber clips, the 9322's maximum rated voltage
to earth is 1500 V AC or DC (CAT ll) / 600 V AC or DC (CAT lll);
when using alligator clips, it is 1000 V AC or DC (CAT ll) / 600
V AC or DC (CAT lll). To avoid electrical shock and possible
damage to the instrument, never apply voltage greater than
these limits between the input channel terminals and chassis,
or across the input of two 9322s.
Maximum input voltage is 1000 V AC/2000 V DC (CAT ll) / 600
V AC or DC (CAT lll). Attempting to measure voltage in excess
of the maximum rating could destroy the instrument and
result in personal injury or death.

viii
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Notes on Use
────────────────────────────────────────────────────
DANGER 10:1 and 100:1 probe connections
The maximum rated to-voltage does not change when using a
9665 10:1PROBE or a 9666 100:1PROBE. To avoid electrical
shock or damaging the 8855 instrument, make probe
connections in such a manner that the method for the probe,
and make sure the to-ground voltage does not exceed the
rated maximum.
The maximum input voltage is 1,000 V DC for the 9665
10:1PROBE, and 5,000 V DC for the 9666 100:1PROBE. (The
measurement category (overvoltage category) is the same as
that of the input modules of MEMORY HiCORDERs that use
the 9665 and the 9666. ) Do not measure voltages that exceed
the maximum input voltage, as the 8855 instrument could be
damaged and an accidents resulting in injury or death could
result.
WARNING Power Supply Connections
Before turning the instrument on, make sure the source
voltage matches that indicated on the instrument's power
connector. Connection to an improper supply voltage may
damage the instrument and present an electrical hazard.
Replacing the Input Modules
To avoid electric shock accident, before removing or
replacing an input module, confirm that the instrument is
turned off and that the connection cords are disconnected.
To avoid the danger of electric shock, never operate the
instrument with an input module removed. To use the
instrument after removing an input module, install a blank
panel over the opening of the removed module.
Grounding the Instrument
To avoid electrical accidents and to maintain the safety
specifications of this instrument, connect the power cord only
to a 3-contact (two-conductor + ground) outlet. Refer to
Section 2.2, "Power Supply and Ground Connections."
Before Powering on
Check that the power supply is correct for the rating of the
instrument. Be careful to avoid connecting voltage improperly,
as the internal circuitry may be destroyed. (The AC fuse is
integrated in the instrument.)
Usage Precautions for the Internal MO Drive (option)
To prevent damage to the instrument, 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).

ix
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Notes on Use
────────────────────────────────────────────────────
CAUTION Installation Environment
This instrument should be installed and operated indoors only,
between 5 and 40 and 30 to 80% RH. Do not store or use the
instrument where it could be exposed to direct sunlight, high
temperature or humidity, or condensation. Under such conditions,
the instrument may be damaged and insulation may deteriorate so
that it no longer meets specifications.
Storing (when the 8994 PRINTER UNIT is installed)
When the product 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 product. If the paper is left in
the product, paper support parts may be damaged due to
vibrations. (when the 8994 PRINTER UNIT is installed)
To avoid damage to the instrument, be sure to remove the PC
card, floppy disk, MO disk and SCSI cable from the instrument
before shipping.
Use the original packing materials when reshipping the instrument,
if possible.
Handling the CD-R
Always hold the disc by the edges, so as not to make fingerprints
on the disc or scratch the printing.
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.
Others
In the event of problems with operation, first refer to Section 14.4,
"Troubleshooting".
Carefully read and observe all precautions in this manual.

x
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Notes on Use
────────────────────────────────────────────────────
NOTE Using a printer
Avoid using the printer in hot, humid environments, as this can greatly
reduce printer life.
Using the connection cords
Use only the specified connection cord (9197, 9198). Using a non-specified
cord may result in incorrect measurements due to poor connection or other
reasons.
Recording paper (when the 8994 PRINTER UNIT is installed)
Use only recording paper specified by Hioki. Non-specified recording paper
may result in poor-quality or blank printouts.
Printing is not possible if the recording paper is loaded wrong-side up. See
Section 2.9.