Hioki CT6711 User manual

EN
EN
CT6711
CURRENT PROBE
CT6710
Instruction Manual
Aug. 2020 Revised edition 1
CT6710A961-01 20-08H
CT6711
CURRENT PROBE
CT6710
Instruction Manual
Aug. 2020 Revised edition 1
CT6710A961-01 20-08H
HIOKI CT6710A961-01

HIOKI CT6710A961-01

Measurement Procedure
Be sure to familiarize yourself with the “Usage Notes”
section (p. 8), each instruction of use, and safety notes
presented at the beginning of each instruction of use.
Inspecting the Device Before Use (p. 26)
Preparing for Measurement (p. 28)
• Provide power to the device.
• Connect the termination unit to your waveform
measuring instrument.
• Execute demagnetization and automatic zero-
adjustment.
Measuring Currents (p. 41)
• Clamp the sensor around a conductor to be
measured.
• Measure a current.
Finishing Measurement (p. 65)
CT6710A961-01
HIOKI CT6710A961-01

Connection Example
Waveform measuring instrument
Model 3269 Power Supply
HL
Power source
Load
See “Example of connection to the circuit to be measured”
(p. 49).
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Contents
Introduction.....................................................................................1
Notations.........................................................................................2
Checking Package Contents .........................................................5
Safety Notes....................................................................................7
Usage Notes....................................................................................8
1 Overview 13
1.1 Product Overview ...................................................13
1.2 Product Features ....................................................14
1.3 Name and Function of Each Part ..........................16
Termination unit .................................................................... 16
Junction box (keys, LEDs).................................................... 18
Sensor .................................................................................. 20
1.4 Specications of Lighting Up / Blinking LEDs.....22
2 Current Measurement 25
2.1 Inspecting the Device Before Use......................... 26
2.2 Preparing for Measurement ...................................28
Providing power to the CT6710/CT6711............................... 29
Executing demagnetization and automatic
zero-adjustment.................................................................... 33
2.3 Measuring Currents................................................41
How to measure a current .................................................... 50
To measure a low current ..................................................... 58
To measure a current accurately .......................................... 60
When the device has entered protection mode .................... 62
2.4 Finishing Measurement..........................................65
4
3
2
1
Index
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Contents
3 Specications 69
3.1 General Specications ...........................................69
3.2 Specications of Input, Output, and
Measurement...........................................................71
Basic specications .............................................................. 71
Specications of accuracy .................................................... 73
3.3 Specications of Functionality..............................75
3.4 Typical Characteristics........................................... 77
Frequency characteristics..................................................... 77
Frequency derating curve..................................................... 78
Input impedance ................................................................... 80
Consumption current ............................................................ 81
Inuence of common-mode voltage...................................... 82
4 Maintenance and Service 83
4.1 Troubleshooting...................................................... 84
Before sending back your device for repair .......................... 85
4.2 Errors .......................................................................88
Types of errors...................................................................... 89
4.3 Cleaning...................................................................96
4.4 Disposal...................................................................97
Index 99
Warranty
HIOKI CT6710A961-01

1
Introduction
Introduction
Thank you for choosing the Hioki CT6710, CT6710 Current
Probe. To ensure your ability to get the most out of this
device over the long term, please read this manual carefully
and keep it available for future reference.
Each model o󰀨ers a di󰀨erent frequency band listed below:
Model CT6710: DC to 50 MHz
Model CT6711: DC to 120 MHz
The following manuals are provided along with these
models. Refer to manuals relevant to your purpose.
• Current Sensor Operating Precautions
Information on the device for safe operation
• Instruction Manual (this document)
Basic instructions and specications of the device
Please review the separate “Current Sensor Operating
Precautions” before using the device.
Target audience
This manual has been written for use by individuals who use
the product in question or who teach others to do so.
It is assumed that the reader possesses basic electrical
knowledge (equivalent to that of someone who graduated
from the electrical program at a technical high school).
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Notations
Notations
Safety notations
This manual classies seriousness of risks and hazard
levels as described below.
DANGER
Indicates an imminently hazardous situation
that, if not avoided, will result in death or
serious injury.
WARNING
Indicates a potentially hazardous situation
that, if not avoided, could result in death or
serious injury.
CAUTION
Indicates a potentially hazardous situation
that, if not avoided, could result in minor or
moderate injury.
NOTICE Indicates potential risks of damage to the
supported product (or to other property).
IMPORTANT
Indicates information or content that is
particularly important from the standpoint of
operating or maintaining the device.
NOTE Indicates useful advice concerning device
performance and operation.
Indicates a high-voltage hazard.
Failure to verify safety or improper handling of the device
could lead to electric shock, burn injury, or death.
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Notations
Indicates an action that must not be performed.
Indicates an action that must be performed.
Symbols shown on the device
Indicates the presence of a potential hazard. For more
information about locations where this symbol appears
on device components, see the “Usage Notes” section
(p. 8), warning messages listed at the beginning of
operating instructions, and the accompanying document
entitled “Current Sensor Operating Precautions.”
Indicates that the device can only be used at a location
on an insulated wire with su󰀩cient insulation for the
circuit voltage.
Symbols for various standards
Indicates the Waste Electrical and Electronic Equipment
Directive (WEEE Directive) in EU member states.
Indicates that the product complies with standards
imposed by EU directives.
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Notations
Others
*Indicates additional information is described below.
Bold Indicates the names of the control keys.
Accuracy
Hioki denes tolerances for measured values in terms of
percentage of reading, as indicated below.
rdg.
Reading (Displayed value)
Indicates the value the measuring instrument
displays. Tolerances for reading errors are
expressed in percent of reading (% of reading,
% rdg).
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Checking Package Contents
Checking Package Contents
When you receive the device, inspect it to ensure that
no damage occurred during shipment. Pay particular
attention to keys and connectors. If you nd any damage
or discover that the device does not perform as indicated
in its specications, please contact your authorized Hioki
distributor or reseller.
Check that the package contents are correct.
The carrying case contains the current probe, Instruction
Manual, and Current Sensor Operating Precautions.
Carrying case
(Accessory)
Model CT6710/CT6711 Current Probe
Instruction Manual
(Accessory)
Current Sensor Operating Precautions
(0990A901)
(Accessory)
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Checking Package Contents
Option
The option below is available for the device. To order an
option, please contact your authorized Hioki distributor or
reseller.
Options are subject to change. Check Hioki’s website for the
latest information.

Model 3269 Power Supply
The 3269 Power Supply can provide the power to up to
two probes of the CT6710/CT6711.
(The 3272 Power Supply cannot be used as a power
supplying unit for the CT6710/CT6711.)
Precautions for transportation
• Store packaging materials for future use. You will need the
packaging materials when shipping the device.
• Transport the device in its carrying case.
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Safety Notes
Safety Notes
The device has been designed in accordance with the IEC
61010 safety standard, and its safety has been veried by
means of testing prior to shipment. However, failure to follow
the information in this manual could render safety-related
functionality provided by the device ine󰀨ective.
Please review the safety information below before using the
device.
DANGER
Read this manual carefully and ensure you
understand its contents before using the
device.
Improper use of the device could result in serious bodily
injury or damage to the device.
WARNING
If using an electrical measuring instrument
for the rst time, seek instruction from an
individual with electrical measurement
experience rst.
Failure to do so may lead to electric shock, overheating,
re, arcing due to a short-circuit, or other hazards.
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Usage Notes
Usage Notes
Be sure to follow the precautions listed below in order to use
the device safely and in a manner that allows it to function
e󰀨ectively.
Use of the device should conform not only to its
specications, but also to the specications of all
accessories, options, and other equipment in use.
DANGER
Do not use the device for measuring bare
conductors.
Take measurements at a location on an
insulated wire with su󰀩cient insulation for the
circuit voltage.
Doing so may result in electric shock or a short-circuit.
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Usage Notes
DANGER
Do not remove any covers of the sensor,
junction box, and termination unit.
The internal components of the device carry high
voltages and may become very hot during operation.
Touching them could cause electric shock or burns.
Do not connect the device to the primary side
of a distribution panel.
If a short-circuit occurs on the primary side, an
unrestricted current ow can damage the device
and facilities, resulting in serious bodily injury. Even
if a short-circuit occurs on the secondary side of the
distribution panel, the panel will interrupt the short-
circuit current.
Do not use the device in powerful magnetic
elds.
Doing so could cause the sensor to become abnormally
hot, resulting in bodily injury, damage to the device, or
re.
Follow all operating precautions for a
waveform measuring instrument or any other
measuring instruments to which this device is
connected.
Failure to observe this could cause serious bodily injury
or damage to these instruments.
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Usage Notes
WARNING
Do not use the device to measure circuits that
exceed the ratings or specications of the
device.
Doing so could cause damage to the device or
overheating, resulting in bodily injury.
Do not install the instrument in locations such
as the following:
• In locations where it would be subject to direct
sunlight
• In locations where it would be subject to high
temperatures
• In locations where it would be exposed to corrosive
or explosive gases
• In locations where it would be exposed to water, oil,
chemicals, or solvents
• In locations where it would be exposed to high
humidity or condensation
• In locations where it would be exposed to powerful
electromagnetic radiation
• Close to objects carrying an electric charge
• In locations with an excessive amount of dust
• Close to inductive heating devices (high-frequency
inductive heating devices, IH cooktops, etc.)
• In locations characterized by a large amount of
mechanical vibration
• Close to HF power supply units
Doing so could cause damage to the device or cause it
to malfucntion, resulting in bodily injury.
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Usage Notes
WARNING
Ensure that the insulation on the cords is
undamaged and that no bare conductors are
improperly exposed before using the device.
Any damage to the cords leads to electric shock.
Contact your authorized Hioki distributor or reseller for
repair.
CAUTION
Do not place the device on an unstable stand
or angled surface.
Doing so could cause the device to fall or overturn,
resulting in bodily injury or damage to the device.
Properly connect the device to a circuit to
be measured and your waveform measuring
instrument.
Improperly connecting them could cause electric shock
or damage to the circuit, device, or your instrument.
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Usage Notes
NOTICE
Do not store or use the device in locations
subject to abrupt temperature changes.
Doing so could damage the sensor heads.
Do not apply force in the directions shown in
the gure below while the upper jaw is locked
in place.
Opening lever position
when the upper jaw is
locked in place
Do not
apply force.
Doing so may damage the retracting/extending
mechanism.
Keep the upper jaw locked in place when the
device is not in use.
Leaving the upper jaw unlocked will cause dust or dirt to
settle on the facing core surfaces, resulting in damage
to the device.
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1
1Overview
1.1 Product Overview
Model CT6710/CT6711 is a clamp-on current probe that
features high current-detection sensitivity and broad
frequency band. The probe uses three current ranges to
detect current waveforms from 1 mA to 50 A.
You can directly connect the termination unit to a BNC input
terminal of your waveform measuring instrument such as
an oscilloscope and recorder, and then clamp the sensor
around a conductor to be measured to observe current
waveforms easily.
Sensor (p. 20)
Termination unit (p. 16)
Junction box (p. 18)
1 Overview
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Product Features
1.2 Product Features
Clamp-on sensor heads (p. 21)
The clamp-on sensor heads allow current measurement
without the need to make physical contact with a
conductor to be measured or to disconnect it. You can
observe current waveforms while maintaining the ow of
electric current.
Sliding jaw retracting/extending mechanism
(p. 21)
This feature lets you easily retract, extend, and lock the
upper jaw in place to clamp the sensor around a conductor
to be measured.
Easy-to-connect output terminal (p. 17, p. 38)
Insert the output terminal into a BNC input terminal on
your waveform measuring instrument to connect the
termination unit.
Warning LED lights (p. 18)
The warning LEDs alert you to an overload (indicating
that an input current value exceeds the rated current of
the device) or jaw-unlocked condition (indicating that the
upper jaw has not been locked in place).
HIOKI CT6710A961-01