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).
HIOKI CT6710A961-01

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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
HIOKI CT6710A961-01

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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).
HIOKI CT6710A961-01

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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.
HIOKI CT6710A961-01

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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.
HIOKI CT6710A961-01

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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).
HIOKI CT6710A961-01