Hioki 9555-10 User manual

Warranty
Warranty malfunctions occurring under conditions of normal use
in conformity with the Instruction Manual and Product Precau-
tionary Markings will be repaired free of charge. This warranty
is valid for a period of one (1) year from the date of purchase.
Please contact the distributor from which you purchased the
product for further information on warranty provisions.
Introduction
Thank you for purchasing the HIOKI Model 9555-10 SENSOR
UNIT. To obtain maximum performance from the device, please
read this manual first, and keep it handy for future reference.
With this device, you can use the Model 9270, 9271, 9272,
9277, 9278, 9279, 9709, 9272-10, CT6862, CT6863 current
sensors as separate units. It is equipped with a high-perfor-
mance sensor for easy current waveform measurement.
Use it as input unit for various current measurement applica-
tions combined with a recorder, oscilloscope, voltmeter, etc.
Initial Inspection
When you receive the device, inspect it carefully to ensure that
no damage occurred during shipping. In particular, check the
accessories, panel switches, and connectors. If damage is evi-
dent, or if it fails to operate according to the specifications, con-
tact your dealer or Hioki representative.
Maintenance and Service
• To clean the device, wipe it gently with a soft cloth moistened
with water or mild detergent. Never use solvents such as
benzene, alcohol, acetone, ether, ketones, thinners or gaso-
line, as they can deform and discolor the case.
• If the device seems to be malfunctioning, confirm that the
batteries are not discharged, and that the test leads, probes
and fuse are not open circuited before contacting your dealer
or Hioki representative.
This manual contains information and warnings essential for
safe operation of the device and for maintaining it in safe oper-
ating condition. Before using it, be sure to carefully read the fol-
lowing safety precautions.
Safety Symbols
The following symbols in this manual indicate the relative impor-
tance of cautions and warnings.
Other Symbol
Measurement categories
To ensure safe operation of measurement devices, IEC 61010
establishes safety standards for various electrical environ-
ments, categorized as CAT II to CAT IV, and called measure-
ment categories.
CAT II: Primary electrical circuits in equipment connected to an AC
electrical outlet by a power cord (portable tools, household
appliances, etc.)
CAT II covers directly measuring electrical outlet receptacles.
CAT III:Primary electrical circuits of heavy equipment (fixed installa-
tions) 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).
Using a measurement device in an environment designated
with a higher-numbered category than that for which the device
is rated could result in a severe accident, and must be carefully
avoided.
Use of a measurement instrument that is not CAT-rated in CAT
II to CAT IV measurement applications could result in a severe
accident, and must be carefully avoided.
Instrument Installation
Operating temperature and humidity: 0 to 40°C, 80%RH or less (non-condensation)
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
Overview
9555-10
SENSOR UNIT
Instruction Manual
September 2013 Revised edition 6
Printed in Japan
9555B981-06 13-09H
Inspection and Maintenance
Pack the device so that it will not sustain damage during ship-
ping, and include a description of existing damage. We cannot
accept responsibility for damage incurred during shipping.
Safety
This device 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 device. Be certain that you under-
stand the instructions and precautions in the man-
ual before use. We disclaim any responsibility for
accidents or injuries not resulting directly from
device defects.
In the manual, the symbol indicates particularly impor-
tant information that the user should read before using the
device.
The symbol printed on the device indicates that the
user should refer to a corresponding topic in the manual
(marked with the symbol) before using the relevant
function.
Indicates DC (Direct Current).
Indicates that incorrect operation presents an extreme
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a significant
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a possibility
of injury to the user or damage to the device.
Indicates advisory items related to performance or cor-
rect operation of the device.
Indicates a prohibited action.
Avoid the following locations that could cause an accident or dam-
age to the device.
Exposed to direct
sunlight
Exposed to high temper-
ature
In the presence of
corrosive or explosive
gases
Exposed to water, oil,
other chemicals, or
solvents
Exposed to high humid-
ity or condensation
Exposed to strong
electromagnetic fields
Near electromagnetic
radiators
Exposed to high levels
of particulate dust Subject to vibration
Usage Notes
• Be sure to observe all operating precautions for the
waveform monitoring instrument (oscilloscope or
recorder) and other measurement instruments to
which the CURRENT SENSOR (refer to Specifica-
tions) is connected using with this device.
• When using a measurement instrument that does not
provide isolation between its input terminals and chas-
sis or other input terminals, please pay attention to the
following points.
If a signal is applied to an input terminal other than that
to which the CURRENT SENSOR is connected, do not
connect the ground-side terminal to any non-ground
potential. Otherwise, short-circuit current will flow
through the CURRENT SENSOR or this device from
the ground terminal, which could cause an electrical
accident or damage.
• Before turning the device on, make sure the supply
voltage matches that indicated on the its power con-
nector. Connection to an improper supply voltage may
damage the device and present an electrical hazard.
• Use only the supplied Model 9418-15 AC ADAPTER.
AC adapter input voltage range is 100 to 240 VAC
(with ±10% stability) at 50/60 Hz. To avoid electrical
hazards and damage to the device, do not apply volt-
age outside of this range.
Never connect the tester as shown in the figure.

Warranty
Warranty malfunctions occurring under conditions of normal use
in conformity with the Instruction Manual and Product Precau-
tionary Markings will be repaired free of charge. This warranty
is valid for a period of one (1) year from the date of purchase.
Please contact the distributor from which you purchased the
product for further information on warranty provisions.
Introduction
Thank you for purchasing the HIOKI Model 9555-10 SENSOR
UNIT. To obtain maximum performance from the device, please
read this manual first, and keep it handy for future reference.
With this device, you can use the Model 9270, 9271, 9272,
9277, 9278, 9279, 9709, 9272-10, CT6862, CT6863 current
sensors as separate units. It is equipped with a high-perfor-
mance sensor for easy current waveform measurement.
Use it as input unit for various current measurement applica-
tions combined with a recorder, oscilloscope, voltmeter, etc.
Initial Inspection
When you receive the device, inspect it carefully to ensure that
no damage occurred during shipping. In particular, check the
accessories, panel switches, and connectors. If damage is evi-
dent, or if it fails to operate according to the specifications, con-
tact your dealer or Hioki representative.
Maintenance and Service
• To clean the device, wipe it gently with a soft cloth moistened
with water or mild detergent. Never use solvents such as
benzene, alcohol, acetone, ether, ketones, thinners or gaso-
line, as they can deform and discolor the case.
• If the device seems to be malfunctioning, confirm that the
batteries are not discharged, and that the test leads, probes
and fuse are not open circuited before contacting your dealer
or Hioki representative.
This manual contains information and warnings essential for
safe operation of the device and for maintaining it in safe oper-
ating condition. Before using it, be sure to carefully read the fol-
lowing safety precautions.
Safety Symbols
The following symbols in this manual indicate the relative impor-
tance of cautions and warnings.
Other Symbol
Measurement categories
To ensure safe operation of measurement devices, IEC 61010
establishes safety standards for various electrical environ-
ments, categorized as CAT II to CAT IV, and called measure-
ment categories.
CAT II: Primary electrical circuits in equipment connected to an AC
electrical outlet by a power cord (portable tools, household
appliances, etc.)
CAT II covers directly measuring electrical outlet receptacles.
CAT III:Primary electrical circuits of heavy equipment (fixed installa-
tions) 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).
Using a measurement device in an environment designated
with a higher-numbered category than that for which the device
is rated could result in a severe accident, and must be carefully
avoided.
Use of a measurement instrument that is not CAT-rated in CAT
II to CAT IV measurement applications could result in a severe
accident, and must be carefully avoided.
Instrument Installation
Operating temperature and humidity: 0 to 40°C, 80%RH or less (non-condensation)
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
Overview
9555-10
SENSOR UNIT
Instruction Manual
September 2013 Revised edition 6
Printed in Japan
9555B981-06 13-09H
Inspection and Maintenance
Pack the device so that it will not sustain damage during ship-
ping, and include a description of existing damage. We cannot
accept responsibility for damage incurred during shipping.
Safety
This device 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 device. Be certain that you under-
stand the instructions and precautions in the man-
ual before use. We disclaim any responsibility for
accidents or injuries not resulting directly from
device defects.
In the manual, the symbol indicates particularly impor-
tant information that the user should read before using the
device.
The symbol printed on the device indicates that the
user should refer to a corresponding topic in the manual
(marked with the symbol) before using the relevant
function.
Indicates DC (Direct Current).
Indicates that incorrect operation presents an extreme
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a significant
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a possibility
of injury to the user or damage to the device.
Indicates advisory items related to performance or cor-
rect operation of the device.
Indicates a prohibited action.
Avoid the following locations that could cause an accident or dam-
age to the device.
Exposed to direct
sunlight
Exposed to high temper-
ature
In the presence of
corrosive or explosive
gases
Exposed to water, oil,
other chemicals, or
solvents
Exposed to high humid-
ity or condensation
Exposed to strong
electromagnetic fields
Near electromagnetic
radiators
Exposed to high levels
of particulate dust Subject to vibration
Usage Notes
• Be sure to observe all operating precautions for the
waveform monitoring instrument (oscilloscope or
recorder) and other measurement instruments to
which the CURRENT SENSOR (refer to Specifica-
tions) is connected using with this device.
• When using a measurement instrument that does not
provide isolation between its input terminals and chas-
sis or other input terminals, please pay attention to the
following points.
If a signal is applied to an input terminal other than that
to which the CURRENT SENSOR is connected, do not
connect the ground-side terminal to any non-ground
potential. Otherwise, short-circuit current will flow
through the CURRENT SENSOR or this device from
the ground terminal, which could cause an electrical
accident or damage.
• Before turning the device on, make sure the supply
voltage matches that indicated on the its power con-
nector. Connection to an improper supply voltage may
damage the device and present an electrical hazard.
• Use only the supplied Model 9418-15 AC ADAPTER.
AC adapter input voltage range is 100 to 240 VAC
(with ±10% stability) at 50/60 Hz. To avoid electrical
hazards and damage to the device, do not apply volt-
age outside of this range.
Never connect the tester as shown in the figure.

Warranty
Warranty malfunctions occurringunder conditions of normal use
in conformity with the Instruction Manual and Product Precau-
tionary Markings will be repaired free of charge. This warranty
is valid for a period of one (1) year from the date of purchase.
Please contact the distributor from which you purchased the
product for further information on warranty provisions.
Introduction
Thank you for purchasing the HIOKI Model 9555-10 SENSOR
UNIT. To obtain maximum performance from the device, please
read this manual first, and keep it handy for future reference.
With this device, you can use the Model 9270, 9271, 9272,
9277, 9278, 9279, 9709, 9272-10, CT6862, CT6863 current
sensors as separate units. It is equipped with a high-perfor-
mance sensor for easy current waveform measurement.
Use it as input unit for various current measurement applica-
tions combined with a recorder, oscilloscope, voltmeter, etc.
Initial Inspection
When you receive the device, inspect it carefully to ensure that
no damage occurred during shipping. In particular, check the
accessories, panel switches, and connectors. If damage is evi-
dent, or if it fails to operate according to the specifications, con-
tact your dealer or Hioki representative.
Maintenance and Service
• To clean the device, wipe it gently with a soft cloth moistened
with water or mild detergent. Never use solvents such as
benzene, alcohol, acetone, ether, ketones, thinners or gaso-
line, as they can deform and discolor the case.
• If the device seems to be malfunctioning, confirm that the
batteries are not discharged, and that the test leads, probes
and fuse are not open circuited before contacting your dealer
or Hioki representative.
This manual contains information and warnings essential for
safe operation of the device and for maintaining it in safe oper-
ating condition. Before using it, be sure to carefully read the fol-
lowing safety precautions.
Safety Symbols
The following symbols in this manual indicate the relative impor-
tance of cautions and warnings.
Other Symbol
Measurement categories
To ensure safe operation of measurement devices, IEC 61010
establishes safety standards for various electrical environ-
ments, categorized as CAT II to CAT IV, and called measure-
ment categories.
CAT II: Primary electrical circuits in equipment connected to an AC
electrical outlet by a power cord (portable tools, household
appliances, etc.)
CAT II covers directly measuring electrical outlet receptacles.
CAT III:Primary electrical circuits of heavy equipment (fixed installa-
tions) 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).
Using a measurement device in an environment designated
with a higher-numbered category than that for which the device
is rated could result in a severe accident, and must be carefully
avoided.
Use of a measurement instrument that is not CAT-rated in CAT
II to CAT IV measurement applications could result in a severe
accident, and must be carefully avoided.
Instrument Installation
Operating temperature and humidity: 0 to 40°C, 80%RH or less (non-condensation)
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
Overview
9555-10
SENSOR UNIT
Instruction Manual
September 2013 Revised edition 6
Printed in Japan
9555B981-06 13-09H
Inspection and Maintenance
Pack the device so that it will not sustain damage during ship-
ping, and include a description of existing damage. We cannot
accept responsibility for damage incurred during shipping.
Safety
This device 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 device. Be certain that you under-
stand the instructions and precautions in the man-
ual before use. We disclaim any responsibility for
accidents or injuries not resulting directly from
device defects.
In the manual, the symbol indicates particularly impor-
tant information that the user should read before using the
device.
The symbol printed on the device indicates that the
user should refer to a corresponding topic in the manual
(marked with the symbol) before using the relevant
function.
Indicates DC (Direct Current).
Indicates that incorrect operation presents an extreme
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a significant
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a possibility
of injury to the user or damage to the device.
Indicates advisory items related to performance or cor-
rect operation of the device.
Indicates a prohibited action.
Avoid the following locations that could cause an accident or dam-
age to the device.
Exposed to direct
sunlight
Exposed to high temper-
ature
In the presence of
corrosive or explosive
gases
Exposed to water, oil,
other chemicals, or
solvents
Exposed to high humid-
ity or condensation
Exposed to strong
electromagnetic fields
Near electromagnetic
radiators
Exposed to high levels
of particulate dust Subject to vibration
Usage Notes
• Be sure to observe all operating precautions for the
waveform monitoring instrument (oscilloscope or
recorder) and other measurement instruments to
which the CURRENT SENSOR (refer to Specifica-
tions) is connected using with this device.
• When using a measurement instrument that does not
provide isolation between its input terminals and chas-
sis or other input terminals, please pay attention to the
following points.
If a signal is applied to an input terminal other than that
to which the CURRENT SENSOR is connected, do not
connect the ground-side terminal to any non-ground
potential. Otherwise, short-circuit current will flow
through the CURRENT SENSOR or this device from
the ground terminal, which could cause an electrical
accident or damage.
• Before turning the device on, make sure the supply
voltage matches that indicated on the its power con-
nector. Connection to an improper supply voltage may
damage the device and present an electrical hazard.
• Use only the supplied Model 9418-15 AC ADAPTER.
AC adapter input voltage range is 100 to 240 VAC
(with ±10% stability) at 50/60 Hz. To avoid electrical
hazards and damage to the device, do not apply volt-
age outside of this range.
Never connect the tester as shown in the figure.

Warranty
Warranty malfunctions occurringunder conditions of normal use
in conformity with the Instruction Manual and Product Precau-
tionary Markings will be repaired free of charge. This warranty
is valid for a period of one (1) year from the date of purchase.
Please contact the distributor from which you purchased the
product for further information on warranty provisions.
Introduction
Thank you for purchasing the HIOKI Model 9555-10 SENSOR
UNIT. To obtain maximum performance from the device, please
read this manual first, and keep it handy for future reference.
With this device, you can use the Model 9270, 9271, 9272,
9277, 9278, 9279, 9709, 9272-10, CT6862, CT6863 current
sensors as separate units. It is equipped with a high-perfor-
mance sensor for easy current waveform measurement.
Use it as input unit for various current measurement applica-
tions combined with a recorder, oscilloscope, voltmeter, etc.
Initial Inspection
When you receive the device, inspect it carefully to ensure that
no damage occurred during shipping. In particular, check the
accessories, panel switches, and connectors. If damage is evi-
dent, or if it fails to operate according to the specifications, con-
tact your dealer or Hioki representative.
Maintenance and Service
• To clean the device, wipe it gently with a soft cloth moistened
with water or mild detergent. Never use solvents such as
benzene, alcohol, acetone, ether, ketones, thinners or gaso-
line, as they can deform and discolor the case.
• If the device seems to be malfunctioning, confirm that the
batteries are not discharged, and that the test leads, probes
and fuse are not open circuited before contacting your dealer
or Hioki representative.
This manual contains information and warnings essential for
safe operation of the device and for maintaining it in safe oper-
ating condition. Before using it, be sure to carefully read the fol-
lowing safety precautions.
Safety Symbols
The following symbols in this manual indicate the relative impor-
tance of cautions and warnings.
Other Symbol
Measurement categories
To ensure safe operation of measurement devices, IEC 61010
establishes safety standards for various electrical environ-
ments, categorized as CAT II to CAT IV, and called measure-
ment categories.
CAT II: Primary electrical circuits in equipment connected to an AC
electrical outlet by a power cord (portable tools, household
appliances, etc.)
CAT II covers directly measuring electrical outlet receptacles.
CAT III:Primary electrical circuits of heavy equipment (fixed installa-
tions) 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).
Using a measurement device in an environment designated
with a higher-numbered category than that for which the device
is rated could result in a severe accident, and must be carefully
avoided.
Use of a measurement instrument that is not CAT-rated in CAT
II to CAT IV measurement applications could result in a severe
accident, and must be carefully avoided.
Instrument Installation
Operating temperature and humidity: 0 to 40°C, 80%RH or less (non-condensation)
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
Overview
9555-10
SENSOR UNIT
Instruction Manual
September 2013 Revised edition 6
Printed in Japan
9555B981-06 13-09H
Inspection and Maintenance
Pack the device so that it will not sustain damage during ship-
ping, and include a description of existing damage. We cannot
accept responsibility for damage incurred during shipping.
Safety
This device 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 device. Be certain that you under-
stand the instructions and precautions in the man-
ual before use. We disclaim any responsibility for
accidents or injuries not resulting directly from
device defects.
In the manual, the symbol indicates particularly impor-
tant information that the user should read before using the
device.
The symbol printed on the device indicates that the
user should refer to a corresponding topic in the manual
(marked with the symbol) before using the relevant
function.
Indicates DC (Direct Current).
Indicates that incorrect operation presents an extreme
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a significant
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a possibility
of injury to the user or damage to the device.
Indicates advisory items related to performance or cor-
rect operation of the device.
Indicates a prohibited action.
Avoid the following locations that could cause an accident or dam-
age to the device.
Exposed to direct
sunlight
Exposed to high temper-
ature
In the presence of
corrosive or explosive
gases
Exposed to water, oil,
other chemicals, or
solvents
Exposed to high humid-
ity or condensation
Exposed to strong
electromagnetic fields
Near electromagnetic
radiators
Exposed to high levels
of particulate dust Subject to vibration
Usage Notes
• Be sure to observe all operating precautions for the
waveform monitoring instrument (oscilloscope or
recorder) and other measurement instruments to
which the CURRENT SENSOR (refer to Specifica-
tions) is connected using with this device.
• When using a measurement instrument that does not
provide isolation between its input terminals and chas-
sis or other input terminals, please pay attention to the
following points.
If a signal is applied to an input terminal other than that
to which the CURRENT SENSOR is connected, do not
connect the ground-side terminal to any non-ground
potential. Otherwise, short-circuit current will flow
through the CURRENT SENSOR or this device from
the ground terminal, which could cause an electrical
accident or damage.
• Before turning the device on, make sure the supply
voltage matches that indicated on the its power con-
nector. Connection to an improper supply voltage may
damage the device and present an electrical hazard.
• Use only the supplied Model 9418-15 AC ADAPTER.
AC adapter input voltage range is 100 to 240 VAC
(with ±10% stability) at 50/60 Hz. To avoid electrical
hazards and damage to the device, do not apply volt-
age outside of this range.
Never connect the tester as shown in the figure.

Warranty
Warranty malfunctions occurringunder conditions of normal use
in conformity with the Instruction Manual and Product Precau-
tionary Markings will be repaired free of charge. This warranty
is valid for a period of one (1) year from the date of purchase.
Please contact the distributor from which you purchased the
product for further information on warranty provisions.
Introduction
Thank you for purchasing the HIOKI Model 9555-10 SENSOR
UNIT. To obtain maximum performance from the device, please
read this manual first, and keep it handy for future reference.
With this device, you can use the Model 9270, 9271, 9272,
9277, 9278, 9279, 9709, 9272-10, CT6862, CT6863 current
sensors as separate units. It is equipped with a high-perfor-
mance sensor for easy current waveform measurement.
Use it as input unit for various current measurement applica-
tions combined with a recorder, oscilloscope, voltmeter, etc.
Initial Inspection
When you receive the device, inspect it carefully to ensure that
no damage occurred during shipping. In particular, check the
accessories, panel switches, and connectors. If damage is evi-
dent, or if it fails to operate according to the specifications, con-
tact your dealer or Hioki representative.
Maintenance and Service
• To clean the device, wipe it gently with a soft cloth moistened
with water or mild detergent. Never use solvents such as
benzene, alcohol, acetone, ether, ketones, thinners or gaso-
line, as they can deform and discolor the case.
• If the device seems to be malfunctioning, confirm that the
batteries are not discharged, and that the test leads, probes
and fuse are not open circuited before contacting your dealer
or Hioki representative.
This manual contains information and warnings essential for
safe operation of the device and for maintaining it in safe oper-
ating condition. Before using it, be sure to carefully read the fol-
lowing safety precautions.
Safety Symbols
The following symbols in this manual indicate the relative impor-
tance of cautions and warnings.
Other Symbol
Measurement categories
To ensure safe operation of measurement devices, IEC 61010
establishes safety standards for various electrical environ-
ments, categorized as CAT II to CAT IV, and called measure-
ment categories.
CAT II: Primary electrical circuits in equipment connected to an AC
electrical outlet by a power cord (portable tools, household
appliances, etc.)
CAT II covers directly measuring electrical outlet receptacles.
CAT III:Primary electrical circuits of heavy equipment (fixed installa-
tions) 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).
Using a measurement device in an environment designated
with a higher-numbered category than that for which the device
is rated could result in a severe accident, and must be carefully
avoided.
Use of a measurement instrument that is not CAT-rated in CAT
II to CAT IV measurement applications could result in a severe
accident, and must be carefully avoided.
Instrument Installation
Operating temperature and humidity: 0 to 40°C, 80%RH or less (non-condensation)
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
Overview
9555-10
SENSOR UNIT
Instruction Manual
September 2013 Revised edition 6
Printed in Japan
9555B981-06 13-09H
Inspection and Maintenance
Pack the device so that it will not sustain damage during ship-
ping, and include a description of existing damage. We cannot
accept responsibility for damage incurred during shipping.
Safety
This device 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 device. Be certain that you under-
stand the instructions and precautions in the man-
ual before use. We disclaim any responsibility for
accidents or injuries not resulting directly from
device defects.
In the manual, the symbol indicates particularly impor-
tant information that the user should read before using the
device.
The symbol printed on the device indicates that the
user should refer to a corresponding topic in the manual
(marked with the symbol) before using the relevant
function.
Indicates DC (Direct Current).
Indicates that incorrect operation presents an extreme
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a significant
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a possibility
of injury to the user or damage to the device.
Indicates advisory items related to performance or cor-
rect operation of the device.
Indicates a prohibited action.
Avoid the following locations that could cause an accident or dam-
age to the device.
Exposed to direct
sunlight
Exposed to high temper-
ature
In the presence of
corrosive or explosive
gases
Exposed to water, oil,
other chemicals, or
solvents
Exposed to high humid-
ity or condensation
Exposed to strong
electromagnetic fields
Near electromagnetic
radiators
Exposed to high levels
of particulate dust Subject to vibration
Usage Notes
• Be sure to observe all operating precautions for the
waveform monitoring instrument (oscilloscope or
recorder) and other measurement instruments to
which the CURRENT SENSOR (refer to Specifica-
tions) is connected using with this device.
• When using a measurement instrument that does not
provide isolation between its input terminals and chas-
sis or other input terminals, please pay attention to the
following points.
If a signal is applied to an input terminal other than that
to which the CURRENT SENSOR is connected, do not
connect the ground-side terminal to any non-ground
potential. Otherwise, short-circuit current will flow
through the CURRENT SENSOR or this device from
the ground terminal, which could cause an electrical
accident or damage.
• Before turning the device on, make sure the supply
voltage matches that indicated on the its power con-
nector. Connection to an improper supply voltage may
damage the device and present an electrical hazard.
• Use only the supplied Model 9418-15 AC ADAPTER.
AC adapter input voltage range is 100 to 240 VAC
(with ±10% stability) at 50/60 Hz. To avoid electrical
hazards and damage to the device, do not apply volt-
age outside of this range.
Never connect the tester as shown in the figure.

Preliminary Checks
Before using the device the first time, verify that it operates nor-
mally to ensure that the no damage occurred during storage or
shipping. If you find any damage, contact your dealer or Hioki
representative.
1. General Specifications
2. Specifications
If the distance between the location of the current to be mea-
sured and the measuring instrument is greater than the length
of the CURRENT SENSOR cable, measurement is possible by
extending from the 9555-10 analog output. Note that there may
be effects such as noise.
• Be careful to avoid connecting voltage improperly, as the in-
ternal circuitry may be destroyed.
• Turn off the power before disconnecting the power cord.
• To avoid damage to the device, do not short the output ter-
minal and do not input voltage to the output terminal.
• Because ± 12 V is output from the connector on the equip-
ment to provide power to the sensor, do not plug anything
into this connector except for the sensor connector.
• To prevent damage to the connected instruments and the
sensor, never connect or disconnect a sensor while the pow-
er is on, or while the sensor is clamped around a conductor.
• To avoid damaging the power cord, grasp the plug, not the
cord, when unplugging it from the power outlet.
• When the power is turned off, do not apply voltage orcurrent
to the clamp sensor. Doing so may damage the device.
• Toavoid damageto thedevice, protectit from physical shock
when transporting and handling. Be especially careful to
avoid physical shock from dropping.
• Do not store or use the device where it could be exposed to
direct sunlight, high temperature or humidity, or condensa-
tion. Under such conditions, the device may be damaged
and insulation may deteriorate so that it no longer meets
specifications.
• Avoid stepping on or pinching cables, which could damage
the cable insulation.
• Keep the cables well away from heat sources, as bare con-
ductors could be exposed if the insulation melts.
• Use the 9217 CONNECTION CORD (resin) when connect-
ing to insulated BNC terminal, and the 9165 CONNECTION
CORD (metal) when connecting to metallic BNC terminal. If
you connect metal BNC cable to insulated BNC terminal, the
insulated BNC terminal can be damaged and the connection
equipment may be damaged.
• Correct measurement may be impossible in the presence of
strong magnetic fields, such as near transformers and high-
current conductors, or in the presence of strong electromag-
netic fields such as near radio transmitters.
• This device may cause interference if used in residential areas.
Such use must be avoided unless the user takes special mea-
sures to reduce electromagnetic emissions to prevent interfer-
ence to the reception of radio and television broadcasts.
Names of Parts
Locking clamp
(Prevents cord from disconnecting)
Front Panel Rear Panel
SENSOR
connector
Output terminal
(BNC terminal)
Power monitor
DEMAG SW
(Demagnetize
switch)
Power jack
Power switch
Measurement Procedure
• Use a measuring instrument with an input resistance of 1 M
or more.
• If the power monitor does not light when the power switch is
turned on, it is likely the device has damaged.
• Also refer to the clamp sensor instruction manual.
Specifications
Operating
environment Indoors, Up to 2000 m (6562ft) ASL
Operating
temperature and
humidity
0°C to 40°C (32 to 104°F), 80%RH max.
(no condensation)
Storage tempera-
ture and humidity -10°C to 50°C (14 to 122°F), 80%RH max. (no condensation)
1. Confirm that the power
switch is OFF, then con-
nect the AC ADAPTER
and the power cord.
Be sure to run the AC
ADAPTER cord through
the locking clamp as
shown in the diagram left
to prevent disconnection.
2. Connect the clamp sen-
sor to the sensor connec-
tor.
3. Turn the power switch
ON and confirm that the
power monitor lights.
When using 9277, 9278 or
9279, you can enact
demagnetization by pressing
DEMAG SW.
4. Clamp the subject con-
ductor and perform the
measurement.
Applicable Stan-
dards EN61010 Pollution degree 2
EN61326 Class A
EN61000-3-2
EN61000-3-3
Accessories Instruction manual
Model 9418-15 AC ADAPTER (with a power cord)
Rated supply voltage: AC100 to 240 V
(Voltage fluctuations of ±10% from the rated
supply voltage are taken into account.)
Rated supply frequency: 50/60 Hz
Rated output voltage: DC 12 V
Applicable cur-
rent sensors Model 9270, 9271,9272, 9277, 9278, 9279, 9709, 9272-10,CT6862,CT6862-10,CT6863,CT6863-10,
CT6865
Output terminal BNC terminal
Accuracy and other characteristics depend on the
connected sensor.
Output supply
voltage ±12 V ±0.5 V, 0.5 Amax
Rated supply
voltage +10 V to +30 V (The supplied AC ADAPTER supplies +12 V.)
Maximum rated
power 20 VA
Dimensions
(Not including
protrusions)
Approx. 42W×82H×132D mm
Approx. 1.65”W×3.24”H×5.20”D
Mass Approx. 600 g (21.2 oz.)
SENSOR
connector RM515ERB-10SD(HIROSE ELECTRIC CO., LTD.)
Connector Pin Configuration
1.GND
2.+12 Vout
3.-12 Vout
4.GND
5.Signal input
6.GND
7.DEMAG
8.NC
9.NC
10.GND
Compatible Connector
RM515EPA-10PC(HIROSE ELECTRIC CO., LTD.)
SW for DEMAG Pressing SW shorts the circuit from 7-10.
Application Example
1
2
3
45
6
7
8
9
10
9555-10
Power
source Load
CURRENT
SENSOR
9418-15
AC ADAPTER
CURRENT SENSOR side Measuring instru-
ment side
Memo

Preliminary Checks
Before using the device the first time, verify that it operates nor-
mally to ensure that the no damage occurred during storage or
shipping. If you find any damage, contact your dealer or Hioki
representative.
1. General Specifications
2. Specifications
If the distance between the location of the current to be mea-
sured and the measuring instrument is greater than the length
of the CURRENT SENSOR cable, measurement is possible by
extending from the 9555-10 analog output. Note that there may
be effects such as noise.
• Be careful to avoid connecting voltage improperly, as the in-
ternal circuitry may be destroyed.
• Turn off the power before disconnecting the power cord.
• To avoid damage to the device, do not short the output ter-
minal and do not input voltage to the output terminal.
• Because ± 12 V is output from the connector on the equip-
ment to provide power to the sensor, do not plug anything
into this connector except for the sensor connector.
• To prevent damage to the connected instruments and the
sensor, never connect or disconnect a sensor while thepow-
er is on, or while the sensor is clamped around a conductor.
• To avoid damaging the power cord, grasp the plug, not the
cord, when unplugging it from the power outlet.
• When the power is turned off, do not apply voltage or current
to the clamp sensor. Doing so may damage the device.
• Toavoiddamage tothe device,protectit from physicalshock
when transporting and handling. Be especially careful to
avoid physical shock from dropping.
• Do not store or use the device where it could be exposed to
direct sunlight, high temperature or humidity, or condensa-
tion. Under such conditions, the device may be damaged
and insulation may deteriorate so that it no longer meets
specifications.
• Avoid stepping on or pinching cables, which could damage
the cable insulation.
• Keep the cables well away from heat sources, as bare con-
ductors could be exposed if the insulation melts.
• Use the 9217 CONNECTION CORD (resin) when connect-
ing to insulated BNC terminal, and the 9165 CONNECTION
CORD (metal) when connecting to metallic BNC terminal. If
you connect metal BNC cable to insulated BNC terminal, the
insulated BNC terminal can be damaged and the connection
equipment may be damaged.
• Correct measurement may be impossible in the presence of
strong magnetic fields, such as near transformers and high-
current conductors, or in the presence of strong electromag-
netic fields such as near radio transmitters.
• This device may cause interference if used in residential areas.
Such use must be avoided unless the user takes special mea-
sures to reduce electromagnetic emissions to prevent interfer-
ence to the reception of radio and television broadcasts.
Names of Parts
Locking clamp
(Prevents cord from disconnecting)
Front Panel Rear Panel
SENSOR
connector
Output terminal
(BNC terminal)
Power monitor
DEMAG SW
(Demagnetize
switch)
Power jack
Power switch
Measurement Procedure
• Use a measuring instrument with an input resistance of 1 M
or more.
• If the power monitor does not light when the power switch is
turned on, it is likely the device has damaged.
• Also refer to the clamp sensor instruction manual.
Specifications
Operating
environment Indoors, Up to 2000 m (6562ft) ASL
Operating
temperature and
humidity
0°C to 40°C (32 to 104°F), 80%RH max.
(no condensation)
Storage tempera-
ture and humidity -10°C to 50°C (14 to 122°F), 80%RH max. (no condensation)
1. Confirm that the power
switch is OFF, then con-
nect the AC ADAPTER
and the power cord.
Be sure to run the AC
ADAPTER cord through
the locking clamp as
shown in the diagram left
to prevent disconnection.
2. Connect the clamp sen-
sor to the sensor connec-
tor.
3. Turn the power switch
ON and confirm that the
power monitor lights.
When using 9277, 9278 or
9279, you can enact
demagnetization by pressing
DEMAG SW.
4. Clamp the subject con-
ductor and perform the
measurement.
Applicable Stan-
dards EN61010 Pollution degree 2
EN61326 Class A
EN61000-3-2
EN61000-3-3
Accessories Instruction manual
Model 9418-15 AC ADAPTER (with a power cord)
Rated supply voltage: AC100 to 240 V
(Voltage fluctuations of ±10% from the rated
supply voltage are taken into account.)
Rated supply frequency: 50/60 Hz
Rated output voltage: DC 12 V
Applicable cur-
rent sensors Model 9270, 9271,9272, 9277, 9278, 9279, 9709, 9272-10,CT6862,CT6862-10,CT6863,CT6863-10,
CT6865
Output terminal BNC terminal
Accuracy and other characteristics depend on the
connected sensor.
Output supply
voltage ±12 V ±0.5 V, 0.5 Amax
Rated supply
voltage +10 V to +30 V (The supplied AC ADAPTER supplies +12 V.)
Maximum rated
power 20 VA
Dimensions
(Not including
protrusions)
Approx. 42W×82H×132D mm
Approx. 1.65”W×3.24”H×5.20”D
Mass Approx. 600 g (21.2 oz.)
SENSOR
connector RM515ERB-10SD(HIROSE ELECTRIC CO., LTD.)
Connector Pin Configuration
1.GND
2.+12 Vout
3.-12 Vout
4.GND
5.Signal input
6.GND
7.DEMAG
8.NC
9.NC
10.GND
Compatible Connector
RM515EPA-10PC(HIROSE ELECTRIC CO., LTD.)
SW for DEMAG Pressing SW shorts the circuit from 7-10.
Application Example
1
2
3
45
6
7
8
9
10
9555-10
Power
source Load
CURRENT
SENSOR
9418-15
AC ADAPTER
CURRENT SENSOR side Measuring instru-
ment side
Memo

Preliminary Checks
Before using the device the first time, verify that it operates nor-
mally to ensure that the no damage occurred during storage or
shipping. If you find any damage, contact your dealer or Hioki
representative.
1. General Specifications
2. Specifications
If the distance between the location of the current to be mea-
sured and the measuring instrument is greater than the length
of the CURRENT SENSOR cable, measurement is possible by
extending from the 9555-10 analog output. Note that there may
be effects such as noise.
• Be careful to avoid connecting voltage improperly, as the in-
ternal circuitry may be destroyed.
• Turn off the power before disconnecting the power cord.
• To avoid damage to the device, do not short the output ter-
minal and do not input voltage to the output terminal.
• Because ± 12 V is output from the connector on the equip-
ment to provide power to the sensor, do not plug anything
into this connector except for the sensor connector.
• To prevent damage to the connected instruments and the
sensor, never connect or disconnect a sensor while thepow-
er is on, or while the sensor is clamped around a conductor.
• To avoid damaging the power cord, grasp the plug, not the
cord, when unplugging it from the power outlet.
• When the power is turned off, do not apply voltage or current
to the clamp sensor. Doing so may damage the device.
• Toavoid damageto the device, protectit from physical shock
when transporting and handling. Be especially careful to
avoid physical shock from dropping.
• Do not store or use the device where it could be exposed to
direct sunlight, high temperature or humidity, or condensa-
tion. Under such conditions, the device may be damaged
and insulation may deteriorate so that it no longer meets
specifications.
• Avoid stepping on or pinching cables, which could damage
the cable insulation.
• Keep the cables well away from heat sources, as bare con-
ductors could be exposed if the insulation melts.
• Use the 9217 CONNECTION CORD (resin) when connect-
ing to insulated BNC terminal, and the 9165 CONNECTION
CORD (metal) when connecting to metallic BNC terminal. If
you connect metal BNC cable to insulated BNC terminal, the
insulated BNC terminal can be damaged and the connection
equipment may be damaged.
• Correct measurement may be impossible in the presence of
strong magnetic fields, such as near transformers and high-
current conductors, or in the presence of strong electromag-
netic fields such as near radio transmitters.
• This device may cause interference if used in residential areas.
Such use must be avoided unless the user takes special mea-
sures to reduce electromagnetic emissions to prevent interfer-
ence to the reception of radio and television broadcasts.
Names of Parts
Locking clamp
(Prevents cord from disconnecting)
Front Panel Rear Panel
SENSOR
connector
Output terminal
(BNC terminal)
Power monitor
DEMAG SW
(Demagnetize
switch)
Power jack
Power switch
Measurement Procedure
• Use a measuring instrument with an input resistance of 1 M
or more.
• If the power monitor does not light when the power switch is
turned on, it is likely the device has damaged.
• Also refer to the clamp sensor instruction manual.
Specifications
Operating
environment Indoors, Up to 2000 m (6562ft) ASL
Operating
temperature and
humidity
0°C to 40°C (32 to 104°F), 80%RH max.
(no condensation)
Storage tempera-
ture and humidity -10°C to 50°C (14 to 122°F), 80%RH max. (no condensation)
1. Confirm that the power
switch is OFF, then con-
nect the AC ADAPTER
and the power cord.
Be sure to run the AC
ADAPTER cord through
the locking clamp as
shown in the diagram left
to prevent disconnection.
2. Connect the clamp sen-
sor to the sensor connec-
tor.
3. Turn the power switch
ON and confirm that the
power monitor lights.
When using 9277, 9278 or
9279, you can enact
demagnetization by pressing
DEMAG SW.
4. Clamp the subject con-
ductor and perform the
measurement.
Applicable Stan-
dards EN61010 Pollution degree 2
EN61326 Class A
EN61000-3-2
EN61000-3-3
Accessories Instruction manual
Model 9418-15 AC ADAPTER (with a power cord)
Rated supply voltage: AC100 to 240 V
(Voltage fluctuations of ±10% from the rated
supply voltage are taken into account.)
Rated supply frequency: 50/60 Hz
Rated output voltage: DC 12 V
Applicable cur-
rent sensors Model 9270, 9271,9272, 9277, 9278, 9279, 9709, 9272-10,CT6862,CT6862-10,CT6863,CT6863-10,
CT6865
Output terminal BNC terminal
Accuracy and other characteristics depend on the
connected sensor.
Output supply
voltage ±12 V ±0.5 V, 0.5 Amax
Rated supply
voltage +10 V to +30 V (The supplied AC ADAPTER supplies +12 V.)
Maximum rated
power 20 VA
Dimensions
(Not including
protrusions)
Approx. 42W×82H×132D mm
Approx. 1.65”W×3.24”H×5.20”D
Mass Approx. 600 g (21.2 oz.)
SENSOR
connector RM515ERB-10SD(HIROSE ELECTRIC CO., LTD.)
Connector Pin Configuration
1.GND
2.+12 Vout
3.-12 Vout
4.GND
5.Signal input
6.GND
7.DEMAG
8.NC
9.NC
10.GND
Compatible Connector
RM515EPA-10PC(HIROSE ELECTRIC CO., LTD.)
SW for DEMAG Pressing SW shorts the circuit from 7-10.
Application Example
1
2
3
45
6
7
8
9
10
9555-10
Power
source Load
CURRENT
SENSOR
9418-15
AC ADAPTER
CURRENT SENSOR side Measuring instru-
ment side
Memo

Warranty
Warranty malfunctions occurring under conditions of normal use
in conformity with the Instruction Manual and Product Precau-
tionary Markings will be repaired free of charge. This warranty
is valid for a period of one (1) year from the date of purchase.
Please contact the distributor from which you purchased the
product for further information on warranty provisions.
Introduction
Thank you for purchasing the HIOKI Model 9555-10 SENSOR
UNIT. To obtain maximum performance from the device, please
read this manual first, and keep it handy for future reference.
With this device, you can use the Model 9270, 9271, 9272,
9277, 9278, 9279, 9709, 9272-10, CT6862, CT6863 current
sensors as separate units. It is equipped with a high-perfor-
mance sensor for easy current waveform measurement.
Use it as input unit for various current measurement applica-
tions combined with a recorder, oscilloscope, voltmeter, etc.
Initial Inspection
When you receive the device, inspect it carefully to ensure that
no damage occurred during shipping. In particular, check the
accessories, panel switches, and connectors. If damage is evi-
dent, or if it fails to operate according to the specifications, con-
tact your dealer or Hioki representative.
Maintenance and Service
• To clean the device, wipe it gently with a soft cloth moistened
with water or mild detergent. Never use solvents such as
benzene, alcohol, acetone, ether, ketones, thinners or gaso-
line, as they can deform and discolor the case.
• If the device seems to be malfunctioning, confirm that the
batteries are not discharged, and that the test leads, probes
and fuse are not open circuited before contacting your dealer
or Hioki representative.
This manual contains information and warnings essential for
safe operation of the device and for maintaining it in safe oper-
ating condition. Before using it, be sure to carefully read the fol-
lowing safety precautions.
Safety Symbols
The following symbols in this manual indicate the relative impor-
tance of cautions and warnings.
Other Symbol
Measurement categories
To ensure safe operation of measurement devices, IEC 61010
establishes safety standards for various electrical environ-
ments, categorized as CAT II to CAT IV, and called measure-
ment categories.
CAT II: Primary electrical circuits in equipment connected to an AC
electrical outlet by a power cord (portable tools, household
appliances, etc.)
CAT II covers directly measuring electrical outlet receptacles.
CAT III:Primary electrical circuits of heavy equipment (fixed installa-
tions) 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).
Using a measurement device in an environment designated
with a higher-numbered category than that for which the device
is rated could result in a severe accident, and must be carefully
avoided.
Use of a measurement instrument that is not CAT-rated in CAT
II to CAT IV measurement applications could result in a severe
accident, and must be carefully avoided.
Instrument Installation
Operating temperature and humidity: 0 to 40°C, 80%RH or less (non-condensation)
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
Overview
9555-10
SENSOR UNIT
Instruction Manual
September 2013 Revised edition 6
Printed in Japan
9555B981-06 13-09H
Inspection and Maintenance
Pack the device so that it will not sustain damage during ship-
ping, and include a description of existing damage. We cannot
accept responsibility for damage incurred during shipping.
Safety
This device 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 device. Be certain that you under-
stand the instructions and precautions in the man-
ual before use. We disclaim any responsibility for
accidents or injuries not resulting directly from
device defects.
In the manual, the symbol indicates particularly impor-
tant information that the user should read before using the
device.
The symbol printed on the device indicates that the
user should refer to a corresponding topic in the manual
(marked with the symbol) before using the relevant
function.
Indicates DC (Direct Current).
Indicates that incorrect operation presents an extreme
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a significant
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a possibility
of injury to the user or damage to the device.
Indicates advisory items related to performance or cor-
rect operation of the device.
Indicates a prohibited action.
Avoid the following locations that could cause an accident or dam-
age to the device.
Exposed to direct
sunlight
Exposed to high temper-
ature
In the presence of
corrosive or explosive
gases
Exposed to water, oil,
other chemicals, or
solvents
Exposed to high humid-
ity or condensation
Exposed to strong
electromagnetic fields
Near electromagnetic
radiators
Exposed to high levels
of particulate dust Subject to vibration
Usage Notes
• Be sure to observe all operating precautions for the
waveform monitoring instrument (oscilloscope or
recorder) and other measurement instruments to
which the CURRENT SENSOR (refer to Specifica-
tions) is connected using with this device.
• When using a measurement instrument that does not
provide isolation between its input terminals and chas-
sis or other input terminals, please pay attention to the
following points.
If a signal is applied to an input terminal other than that
to which the CURRENT SENSOR is connected, do not
connect the ground-side terminal to any non-ground
potential. Otherwise, short-circuit current will flow
through the CURRENT SENSOR or this device from
the ground terminal, which could cause an electrical
accident or damage.
• Before turning the device on, make sure the supply
voltage matches that indicated on the its power con-
nector. Connection to an improper supply voltage may
damage the device and present an electrical hazard.
• Use only the supplied Model 9418-15 AC ADAPTER.
AC adapter input voltage range is 100 to 240 VAC
(with ±10% stability) at 50/60 Hz. To avoid electrical
hazards and damage to the device, do not apply volt-
age outside of this range.
Never connect the tester as shown in the figure.