Hioki 3155-01 User manual

LEAK CURRENT HiTESTER
INSTRUCTION MANUAL
3155-01

Contents
Introduction i
Inspection i
Safety Notes ii
Notes on Use iii
Contents of this Manual viii
Chapter 1 Overview 1
1.1 Product Introduction 1
1.2 Features of the 3155 2
1.3 Measuring Mode of the 3155 4
1.4 Leakage Measurement Types 5
1.5 Standards Regarding Leakage Current 6
Chapter 2 Names and Functions of Parts 7
Chapter 3 Options 13
3.1 Measurement Networks 13
3.1.1 9497 NETWORK B (for the Medical Electrical Equipment) 13
3.1.2 9498 NETWORK C (for IEC/TR 60990) 14
3.1.3 9499 NETWORK D (Universal) 16
3.2 9196 APPLY UNIT 18
3.2.1 9196 APPLY UNIT 18
3.2.2 Names and Functions of the Parts
of the 9196 APPLY UNIT 19
3.2.3 9196 APPLY UNIT Operation 21
3.2.4 9196 APPLY UNIT Specifications 23
3.3 9388 CARRYING CASE (with Casters) 24
Chapter 4 Preparations for Measurement 25
4.1 Installing the Measurement Network 26
4.2 Power Cord Connection 27
4.3 Powering on and off the Unit 28
4.4 Loading Recording Paper 30

Chapter 5 Medical Electrical Equipment Measurement
Network B Installed 31
5.1 Leakage Current Measurement Types and
Their Allowable Values for Medical Electrical Equipment 31
5.2 Screens (ME Equipment) 34
5.2.1 Initial Screen (ME Equipment) 35
5.2.2 Equipment Set-up Screen (ME Equipment) 35
5.2.3 Measuring Mode Screen (ME Equipment) 37
5.2.4 System Screen (ME Equipment) 38
5.2.5 Flow of Screens for Basic Operations (for ME Equipment) 40
5.3 Earth Leakage Current Measurement Mode (ME Equipment) 41
5.3.1 Earth Leakage Current Measurement Mode 41
5.3.2 Connecting Equipment for Earth Leakage Current
Measurement (ME Equipment) 42
5.3.3 Zero Adjustment (Earth Leakage Current) 44
5.3.4 Basic Settings for Earth Leakage Current Measurement
(ME Equipment) 45
5.3.5 Earth Leakage Current Measurement Screen
(ME Equipment) 46
5.4 Enclosure Leakage Current Measurement Mode
(ME Equipment) 48
5.4.1 Enclosure Leakage Current Measurement Mode 48
5.4.2 Connecting Equipment for Enclosure Leakage Current
Measurement (ME Equipment) 50
5.4.3 Basic Settings for Enclosure Leakage Current
Measurement (ME Equipment) 54
5.4.4 Enclosure Leakage Current Measurement Screen
(ME Equipment) 55
5.5 Patient Leakage Current Measurement Mode 57
5.5.1 Patient Leakage Current Measurement Mode 57
5.5.2 Connecting Equipment for Patient Leakage Current
Measurement 59
5.5.3 Basic Settings for Patient Leakage Current
Measurement 61
5.5.4 Patient Leakage Current Measurement Screen 62

5.6 Patient Leakage Current Measurement Mode 64
5.6.1 Patient Leakage Current Measurement Mode 64
5.6.2 Connecting Equipment for Patient Leakage Current
Measurement 65
5.6.3 Basic Settings for Patient Leakage Current
Measurement 67
5.6.4 Patient Leakage Current Measurement Screen 68
5.7 Patient Leakage Current Measurement Mode 70
5.7.1 Patient Leakage Current Measurement Mode 70
5.7.2 Connecting Equipment for Patient Leakage Current
Measurement 71
5.7.3 Zero Adjustment (ME Equipment - Patient Leakage
Current ) 73
5.7.4 Basic Settings for Patient Leakage Current
Measurement 74
5.7.5 Patient Leakage Current Measurement Screen 75
5.8 Patient Auxiliary Current Measurement Mode 77
5.8.1 Patient Auxiliary Current Measurement Mode 77
5.8.2 Connecting Equipment for Patient Auxiliary Current
Measurement 79
5.8.3 Basic Settings for Patient Auxiliary Current Measurement 81
5.8.4 Patient Auxiliary Current Measurement Screen 82
5.9 Low Resistance Measurement Mode (ME Equipment) 84
5.9.1 Low Resistance Measurement Mode 84
5.9.2 Connecting Equipment for Low Resistance Measurement
(ME Equipment) 85
5.9.3 Basic Settings for Low Resistance Measurement
(ME Equipment) 88
5.9.4 Low Resistance Measurement Screen (ME Equipment) 89
5.10 Condition Set-up Window Setting (ME Equipment) 91
5.10.1 Allowable Value Setting (For Leakage Current
Measurement) 91
5.10.2 Allowable Value Setting (For Low Resistance
Measurement) 93
5.10.3 Automatic Measurement Setting (ME Equipment) 95
5.10.4 Measurement Current Setting (ME Equipment) 99
5.10.5 Printing out the Maximum Values (ME Equipment) 100
5.10.6 Saving the Maximum Values (ME Equipment) 101
5.10.7 Low Resistance Measurement with 3157 103

5.11 System Screen (ME Equipment) 105
5.11.1 System Screen 105
5.11.2 Saved Data Reference Screen (ME Equipment) 106
5.11.3 Initialization Screen 110
5.11.4 Allowable Value Judgment Set-up Screen 111
5.11.5 Beep Sound Set-up Screen 111
5.11.6 Communications Set-up Screen 112
5.11.7 Printer Set-up Screen 112
5.11.8 Time and Date Set-up Screen 113
5.11.9 Self-test Screen 113
5.11.10 Language Set-up Screen 114
Chapter 6 Ordinary Electrical Equipment Measurement
Network C Installed 115
6.1 Measurement Network C 116
6.1.1 Leakage Current Measurement Types and Their
Allowable Values for Ordinary Electrical Equipment 117
6.2 Screens (for IEC/TR 60990) 118
6.2.1 Initial Screen (for IEC/TR 60990) 118
6.2.2 "Equipment Set-up" Screen (for IEC/TR 60990) 119
6.2.3 Measuring Mode Screen (for IEC/TR 60990) 121
6.2.4 System Screen (for IEC/TR 60990) 122
6.2.5 Flow of Screens for Basic Operations (for IEC/TR 60990) 124
6.3 Enclosure Leakage Current Measurement Mode
(for IEC/TR 60990) 125
6.3.1 Measurement Accompanying IEC 60950 (1991-10) +
am4 (1996-07) 126
6.3.2 Connecting Equipment for Measurement Accompanying
IEC 60950 (1991-10) + am4 (1996-07) 128
6.3.3 Zero Adjustment (for IEC/TR 60990 - Enclosure Leakage
Current) 131
6.3.4 Measurement Accompanying IEC 61010-1 (1990-09) +
am1 (1992-09) + am2 (1995-07) 132
6.3.5 Connecting Equipment for Measurement Accompanying
IEC 61010-1 (1990-09) + am1 (1992-09) + am2 (1995-07)133
6.3.6 Basic Settings for Enclosure Leakage Current
Measurement (for IEC/TR 60990) 135
6.3.7 Enclosure Leakage Current Measurement Screen
(for IEC/TR 60990) 136

6.4 Earth Leakage Current Measurement Mode
(for IEC/TR 60990) 139
6.4.1 Earth Leakage Current Measurement Mode 139
6.4.2 Connecting Equipment for Earth Leakage Current
Measurement (for IEC/TR 60990) 140
6.4.3 Zero Adjustment (Earth Leakage Current) 141
6.4.4 Basic Settings for Earth Leakage Current Measurement
(for IEC/TR 60990) 142
6.4.5 Earth Leakage Current Measurement Screen
(for IEC/TR 60990) 143
6.5 Low Resistance Measurement Mode (for IEC/TR 60990) 146
6.5.1 Low Resistance Measurement Mode 146
6.5.2 Connecting Equipment for Low Resistance Measurement
(for IEC/TR 60990) 147
6.5.3 Basic Settings for Low Resistance Measurement 149
6.5.4 Low Resistance Measurement Screen 150
6.6 Condition Set-up Window Setting (for IEC/TR 60990) 152
6.6.1 Allowable Value Setting (For Leakage Current
Measurement) 152
6.6.2 Allowable Value Setting (For Low Resistance
Measurement) 154
6.6.3 Automatic Measurement Setting (for IEC/TR 60990) 156
6.6.4 Measurement Current Setting (for IEC/TR 60990) 160
6.6.5 Printing out the Maximum Values (for IEC/TR 60990) 161
6.6.6 Saving the Maximum Values (for IEC/TR 60990) 162
6.6.7 Low Resistance Measurement with 3157 163
6.7 System Screen (for IEC/TR 60990) 165
6.7.1 System Screen 165
6.7.2 Saved Data Reference Screen (for IEC/TR 60990) 166
6.7.3 Initialization Screen 170
6.7.4 Allowable Value Judgment Set-up Screen 171
6.7.5 Beep Sound Set-up Screen 171
6.7.6 Communications Set-up Screen 172
6.7.7 Printer Set-up Screen 172
6.7.8 Time and Date Set-up Screen 173
6.7.9 Self-test Screen 173
6.7.10 Language Set-up Screen 174

Chapter 7 Ordinary Electrical Equipment Measurement
Network D Installed 175
7.1 Measurement Network D 176
7.2 Screens (Universal) 177
7.2.1 Initial Screen (Universal) 178
7.2.2 "Equipment Set-up" Screen (Universal) 178
7.2.3 Measuring Mode Screen (Universal) 180
7.2.4 System Screen (Universal) 181
7.2.5 Flow of Screens for Basic Operations (Universal) 183
7.3 Enclosure Leakage Current Measurement Mode (Universal) 184
7.3.1 Enclosure Leakage Current Measurement Mode 184
7.3.2 Leakage Current Measurement with the Universal
Measurement Network 185
7.3.3 Connecting Equipment for Leakage Current Measurement186
7.3.4 Zero Adjustment (Universal - Enclosure Leakage Current) 188
7.3.5 Basic Settings for Enclosure Leakage Current
Measurement (Universal) 189
7.3.6 Enclosure Leakage Current Measurement Screen
(Universal) 190
7.4 Earth Leakage Current Measurement Mode (Universal) 193
7.4.1 Earth Leakage Current Measurement Mode 193
7.4.2 Connecting Equipment for Earth Leakage Current
Measurement (Universal) 194
7.4.3 Zero Adjustment (Earth Leakage Current) 195
7.4.4 Basic Settings for Earth Leakage Current Measurement
(Universal) 196
7.4.5 Earth Leakage Current Measurement Screen (Universal) 197
7.5 Low Resistance Measurement Mode (Universal) 200
7.5.1 Low Resistance Measurement Mode 200
7.5.2 Connecting Equipment for Low Resistance Measurement
(Universal) 201
7.5.3 Basic Settings for Low Resistance Measurement 203
7.5.4 Low Resistance Measurement Screen 204
7.6 Condition Set-up Window Setting (Universal) 206
7.6.1 Allowable Value Setting (For Leakage Current
Measurement) 206
7.6.2 Allowable Value Setting (For Low Resistance
Measurement) 208

7.6.3 Automatic Measurement Setting (Universal) 210
7.6.4 Measurement Current Setting (Universal) 214
7.6.5 Printing out the Maximum Values (Universal) 215
7.6.6 Saving the Maximum Values (Universal) 216
7.6.7 Low Resistance Measurement with 3157 217
7.7 System Screen (Universal) 219
7.7.1 System Screen 219
7.7.2 Saved Data Reference Screen (Universal) 220
7.7.3 Initialization Screen 224
7.7.4 Allowable Value Judgment Set-up Screen 225
7.7.5 Beep Sound Set-up Screen 225
7.7.6 Communications Set-up Screen 226
7.7.7 Printer Set-up Screen 226
7.7.8 Time and Date Set-up Screen 227
7.7.9 Self-test Screen 227
7.7.10 Language Set-up Screen 228
Chapter 8 Command Reference 229
8.1 Overview 229
8.2 Specifications 229
8.3 Names of Parts 230
8.4 Connecting Method 231
8.5 Operation 233
8.5.1 Communication Conditions Setting 233
8.5.2 Communication Methods by the RS-232C 234
8.5.3 Message Format 235
8.5.4 Headers 236
8.5.5 Data Formats 237
8.5.6 Delimiters 238
8.5.7 Separators 238
8.5.8 Abbreviating Messages with Compound Headers 239
8.5.9 Output Queue 240
8.5.10 Input Buffer 240
8.5.11 Error Register 241
8.6 Command Summary 242
8.7 Initialization Items 244

8.8 Command Reference 245
8.8.1 Format of Command Explanations 245
8.9.2 Commands 246
8.9 Reading in All the Saved Data 285
8.10 Sample Programs 286
8.11 Troubleshooting 293
Chapter 9 Specifications 295
9.1 General Specifications 295
9.2 Measuring Mode Specifications 297
9.2.1 Leakage Current Measurement 297
9.2.2 Low Resistance Measurement 298
9.2.3 Monitor Function 298
9.3 Accuracy Tables 299
Chapter 10 Maintenance and Servicing 303
10.1 Maintenance and Inspection 303
10.2 Fuse Replacement 304
10.2.1 Replacement of the 3155 Power Source Fuse 304
10.2.2 Replacement of the Measurement Network Fuse 305
10.2.3 Replacement of the 9196 APPLY UNIT Power Source
Fuse 306
10.3 Troubleshooting 307
10.4 System Reset 308
10.4.1 Resetting the system 308
10.4.2 Default Settings 309
10.5 Ultimate Disposal 312
10.6 External Dimensions 314

Appendices 315
Appendix 1 Error Messages 316
Appendix 2 Leakage Current Measurement 317
Appendix 2.1 IEC 60601-1 (1988-12) + am1 (1991-11) +
am2 (1995-03) 317
2.1.1 Earth Leakage Current 317
2.1.2 Enclosure Leakage Current 318
2.1.3 Patient Leakage Current 319
2.1.4 Patient Leakage Current 320
2.1.5 Patient Leakage Current 321
2.1.6 Patient Auxiliary Current 322
Appendix 2.2 IEC 60950 (1991-10) + am4 (1996-07) 323
Appendix 3 Standards for Leakage Current and Current
Measurements 327
Appendix 3.1 When the 9497 NETWORK B is installed 327
3.1.1 Medical Electrical Equipment Part 1: General
Requirements of Safety (IEC 60601-1 (1988-12) + am1
(1991-11) + am2 (1995-03)) 327
Appendix 3.2 When the 9498 NETWORK C is Installed 328
3.2.1 Methods of Measurement of Touch-current and
Protective Conductor Current (IEC/TR 60990 (1990-06))
328
3.2.2 Safety of Information Technology Equipment (IEC 60950
(1991-10) + am4 (1996-07)) 330
3.2.3 IEC 61010-1 (1990-09) + am1 (1992-09) +
am2 (1995-07) 332
Appendix 4 Glossary (Extracted from IEC 60601-1(1988-12)
+ am1 (1991-11) + am2 (1995-03)) 333
Appendix 5 Assembling the Supplied Power Plug 336

i
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Introduction
────────────────────────────────────────────────────
NOTE
I
ntroduction
I
nspection
Thank you for purchasing this HIOKI "3155 LEAK CURRENT HiTESTER." To
get the maximum performance from the unit, please read this manual first,
and keep this at hand.
When the unit is delivered, check and make sure that it has not been
damaged in transit. If the unit is damaged, or fails to operate according to the
specifications, contact your dealer or HIOKI representative.
Checking the main unit and accessories
Main unit
"3155 LEAK CURRENT HiTESTER"
Accessories
Verify that the following standard accessories are complete.
(1) Grounded three-core power cord
(2) 9170 TEST LEADS
(3) Instruction Manual
(4) 9195 ENCLOSURE PROBE
(5) Spare fuse 3155 (120 V): 250 V T0.5 AL
3155 (200/240 V): 250 V T0.25 AL
3155-01: 250 V T0.2 AL
(6) 9233 RECORDING PAPER (1 roll)
(7) 9399 CARRYING CASE (for accessories)
(8) Alligator clips (red and black)
(9) Outlet power plug (3155 (200/240 V), 3155-01)
(10) Voltage selector key (3155-01 only) 2
The NETWORKS (9497 to 9499), 9461 PIN- TYPE LEADS, 9287 CLIP-TYPE
LEADS, and 9196 APPLY UNIT are not included. Please purchase separately
according to your needs.
Shipment of the unit
If reshipping the unit, preferably use the original packing.
Warranty
HIOKI cannot be responsible for losses caused either directly or indirectly by
the use of the 3155 with other equipment, or if ownership is transferred to a
third party.

ii
────────────────────────────────────────────────────
Safety Notes
────────────────────────────────────────────────────
DANGE
R
This equipment is designed according to IEC 61010-1 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. The manufacturer disclaims all responsibility for any acciden
t
or injury except that resulting due to defect in its product.
・This symbol is affixed to locations on the equipment where the
operator should consult corresponding topics in this manual
(which are also marked with the symbol) before using relevant
functions of the equipment.
・In the manual, this mark indicates explanations which it is
particularly important that the user read before using the
equipment.
Indicates a fuse.
Indicates a grounding terminal.
Indicates DC (Direct Current).
Indicates AC (Alternating 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.
DANGE
R
Indicates that incorrect operation presents extreme danger of accident
resulting in death or serious injury to the user.
WARNIN
G
Indicates that incorrect operation presents significant danger of acciden
t
resulting in death or serious injury to the user.
CAUTIO
N
Indicates that incorrect operation presents possibility of injury to the
user or damage to the equipment.
NOTE Denotes items of advice related to performance of the equipment or to
its correct operation.
S
afety Notes
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.
Safety symbols
The following symbols are used in this Instruction Manual to indicate the relative importance
of cautions and warnings.

iii
────────────────────────────────────────────────────
Notes on Use
────────────────────────────────────────────────────
WARNIN
G
Before turning on the power, make sure that the voltage of the power
supply being used matches the supply voltage indicated on the rear
panel of the unit. (3155: specified at order, 3155-01: set by the voltage
selector)
If an attempt is made to use an improper supply voltage, there is danger
of damage to this unit and of life-threatening risk to the operator.
The unit is constructed so as to be connected to a ground line via a
three-core power cord that is supplied with the unit. In order to avoid
electric shock, connect the unit to a properly grounded (3-pin) outlet
using the power cord provided.
Before using the unit, make sure that the sheathing on the leads /
probes is not damaged and that no bare wire is exposed. If there is
damage, using the unit could cause electric shock. Replace the lead /
probe with the specified 9195 or 9170, or optional 9461 or 9287.
To avoid the danger of electric shock, never operate the unit with a
measurement network removed.
Do not swithc the voltage selector when the power is turned on.
CAUTIO
N
Do not press hard upon the touch screen, or operate it using a hard object or
one with a sharp end. Doing so could scratch or damage the screen or the
soft keys.
NOTE
N
otes on Use
In order to ensure safe operation and to obtain maximum performance from
the unit, observe the cautions listed below.
Before measurement
・Of the three optional Measurement Networks (9497, 9498 and 9499), one
must be installed with the 3155 or no measurements can be made. If the
power to the 3155 is turned on without having installed one of the networks,
the message ’Measurement Network not installed.’ will appear on the LCD.
In which case, please install a measurement network as described in Section
4.1, "Installing the Measurement Network."
・Because the current consumption monitor is AC coupled, errors occur when
measuring an AC current which includes a DC offset. (Example: half-wave
rectified current)

iv
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Notes on Use
────────────────────────────────────────────────────
CAUTIO
N
・In order to avoid electric shock, turn off the power to all devices before
plugging in or unplugging the measurement network or RS-232C connector.
・When unplugging the power cord from the power receptacle or from the unit,
grasp the plug, not the cord, in order to avoid damaging the cable.
・To avoid damaging the leads or probes, do not bend or pull the leads or
probes.
・Use caution when taking measurements in circuits where the power line are
hot.
・For safety reasons, only use the 9195 or 9170 probe / test lead provided with
the unit, or the optional 9461 or 9287 for measurement.
・The changing of the function when replacing the test terminals requires
disconnection of the test leads from the equipment being measured and then
the disconnection of the test leads from the terminals.
・To avoid damage to the unit, do not short the output terminal and do not
input voltage to the output terminal.
・Use the unit near the power receptacle.
WARNIN
G
The 9196 APPLY UNIT used in the measurement of enclosure leakage
current, patient leakage current and patient leakage current
continuously outputs voltage while the voltage application button is
being pressed. Care is required to avoid accidents caused by electrical
shock.
The leakage current measurement terminals, the resistance
measurement terminals and the RS-232C connector are not insulated.
Handle these items carefully in order to avoid electric shock or a short
circuit accident.
If the end of a lead or a probe short-circuits lines with a voltage between
them, this is very dangerous and can lead to a serious accident.
Exercise great care when measuring voltages.
In the event that the equipment malfunctions in any manner during use,
turn off the power immediately, and contact your dealer or HIOKI
representative.
Connection
During measurement

v
────────────────────────────────────────────────────
Notes on Use
────────────────────────────────────────────────────
Monitor lamps
NOTE
DANGE
R
To avoid electric shock and damage to the unit, do not input a voltage
exceeding the permissible common mode voltage to the leakage current
measurement terminals. The permissible common mode voltage is 250 V
(DC+AC peak). (In the 50 μA range, 20 V (DC+AC peak))
CAUTIO
N
When the power is turned off, do not apply voltage or current to the leakage
current measurement terminals or resistance measurement terminals. Doing
so may damage the unit.
WARNIN
G
Only use fuses of the specified type that is rated for the specified
current and voltage. Using a fuse that does not meet the specifications
or shorting the fuse holder may cause an accident that might result in
injury or death.
(120 V: 250 V T0.5 AL, 200/240 V: 250 V T0.25 AL 20 mm ×5 mm dia.
(3155))
(110 to 120/200/240 V: 250 V T0.2 AL 20 mm ×5 mm dia. (3155-01))
When replacing the fuse and measurement network, always power off
the unit.
When the power to the 3155 is turned on, if the
MON2 and MON3 lamps are illuminated, an
accurate measurement can be obtained. (The unit
can also be wired so that MON1 and MON2
illuminate.)
For details, refer to Section 4.3, "Powering on and
off the Unit."
Input
Replacement

vi
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Notes on Use
────────────────────────────────────────────────────
WARNIN
G
To prevent electric shock, do not allow the unit to become wet and do
not use the unit when your hands are wet.
The interior of the 3155 contains some components which are subject to
high voltage, and therefore dangerous. Absolutely do not remove the
cover panel. In particular, be careful of the 9196 APPLY UNIT, which is
subject to high voltage.
To avoid damage to the unit, do not subject the equipment to vibrations
or shocks during transport or handling. Be especially careful to avoid
dropping the equipment.
The unit should always be operated indoors in a range from 5℃to 40℃
and 35% to 80% rh. Do not use the unit in direct sunlight, dusty
conditions, or in the presence of corrosive gases.
Do not use the unit near any device which generates strong
electromagnetic radiation or near a static electrical charge, as these may
cause errors.
NOTE
Operating environment
・Accurate measurement may be impossible in locations subject to strong
external magnetic fields, such as transformers and high-current conductors,
or in locations subject to strong external electric fields, such as radio
transmission equipment.
・Do not use the 3155 in operating rooms, ICUs, CCUs or other areas where
an isolated electrical supply is used. To do so will result in inaccurate
readings.

vii
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Notes on Use
────────────────────────────────────────────────────
Printer and recording paper
Printer
・Using the printer in a high-temperature or high-humidity environment
should be avoided at all costs. This can seriously reduce the printer life.
・Because the thermal printing head is subject to high temperatures during
printing, do not touch the head itself or its support sections either during or
directly after printing. Care is also necessary when replacing the paper or
during maintenance. For paper replacement, refer to Section 4.4, "Loading
Recording Paper."
・Because the motor is subject to high temperature during operation, do not
touch it either during or directly after printing.
・To prevent the motor from being overheated, do not press the feed switch
continuously for more than 3 minutes.
Recording paper
・This unit uses a thermal printer. The recording paper supplied has
characteristics finely tuned for use with the printer.
Using recording paper of a different specification may not only result in
impaired printing quality, but even prevent the printer from operating.
Always use the HIOKI specified product.
・If light reaches the paper over a long period, the paper will discolor. Do not
unwrap rolls of paper until you are ready to use them.
・The recording paper uses a thermochemical reaction. Note the following
points:
・To avoid discoloration, do not leave recording paper in direct sunlight.
Store at not more than 40℃and 90% rh.
・To keep definitive data, make photocopies of the recordings.
・If the thermal paper absorbs an organic solvent such as alcohols or
ketones it may no longer develop properly, and recorded information may
fade. Soft PVC film and transparent contact adhesive tape contain such
solvents, so avoid using them with recordings.
・Avoid interleaving the thermal recordings with damp diazo copies.

viii
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Contents of this Manual
────────────────────────────────────────────────────
C
ontents of this Manual
The operating methods of the 3155 LEAK CURRENT HiTESTER will vary
depending upon the type of measurement network used. The various
operating methods for each type of measurement network are shown in
Chapters 5 to 7. Although there is some repetition between chapters, to
ensure safe operation please read thoroughly the chapter pertaining to the
measurement network you use.
Chapter 1: Overview
Gives an overview and features of the unit.
Chapter 2: Names of Functions of Parts
Describes the names and functions of the parts of the unit.
Chapter 3: Options
Describes the options (measurement networks and application
units) of the unit.
Chapter 4: Preparations for Measurement
Describes the installation and preparatory work.
Chapter 5: Medical Electrical Equipment Measurement
(9497 NETWORK B installed)
Describes the medical electrical equipment measurement.
Chapter 6: Ordinary Electrical Equipment Measurement (for IEC/TR 60990)
(9498 NETWORK C installed)
Describes the ordinary electrical equipment measurement (for
IEC/TR 60990).
Chapter 7: Ordinary Electrical Equipment Measurement (Universal)
(9499 NETWORK D installed)
Describes the ordinary electrical equipment measurement
(universal).
Chapter 8: Command Reference
Describes the RS-232C communications and their operation
examples.
Chapter 9: Specifications
Contains the unit specifications such as the general specifications,
measurement ranges, accuracy, etc. of the unit.
Chapter 10: Maintenance and Servicing
Covers the maintenance and servicing.
Appendices: Covers the error messages, leakage current measurement,
standards and glossary.