9658
(Extracted from EN 61010-2-032)
CLAMP ON LEAK SENSOR
Instruction Manual
September 2013 Revised edition 7
Printed in Japan
9658A981-07 13-09H
Warranty
Warranty malfunctions occurring under conditions of normal use
in conformity with the Instruction Manual and Product
Precautionary 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 9658 CLAMP ON LEAK
SENSOR. To obtain maximum performance from the product,
please read this manual first, and keep it handy for future
reference.
Inspection
When you receive the product, inspect it carefully to ensure that
no damage occurred during shipping. If damage is evident, or if it
fails to operate according to the specifications, contact your dealer
or Hioki representative.
Safety
DANGER
This product 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 product. Be certain that you
understand the instructions and precautions in the manual before
use. We disclaim any responsibility for accidents or injuries not
resulting directly from product defects.
Safety symbols
The symbol printed on the product indicates that
the user should refer to a corresponding topic in the
manual (marked with the
the relevant function.
In the manual, the symbol indicates particularly
important information that the user should read
before using the product.
Indicates AC (Alternating Current).
Wear appropriate protective insulation (insulating
rubber gloves and boots, helmet and etc.) when
connecting and disconnecting from live electric circuits.
The following symbols in this manual indicate the relative
importance of cautions and warnings.
Indicates that incorrect operation presents an
DANGER
WARNING
CAUTION
NOTE
We define measurement tolerances in terms of f.s. (full scale) and
rdg. (reading) values, with the following meanings:
f.s. (maximum display value or scale length)
The maximum displayable value or scale length. This is usually
the name of the currently selected range.
rdg. (reading or displayed value)
The value currently being measured and indicated on the
measuring product.
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
product.
Indicates advisory items related to performance
or correct operation of the product.
symbol) before using
Measurement categories
This product complies with CAT III safety requirements.
To ensure safe operation of measurement products, IEC 61010
establishes safety standards for various electrical environments,
categorized as CAT II to CAT IV, and called measurement
categories. These are defined as follows.
CAT II: Primary electrical circuits in equipment connected to a
wall outlet via 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
installations) connected directly to the distribution panel,
and feeders between the distribution panel and outlets.
CAT IV: The circuit from the service drop to the service entrance,
then to the power meter and to the primary overcurrent
protection device.
Using a measurement iproduct in an environment designated with
a higher-numbered category than that for which the product 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 C AT IV measurement applications could result in a severe
accident, and must be carefully avoided.
Notes on Use
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
DANGER
When conductors being measured carry in excess of the
safe voltage level (SELV-E)
prevent short circuits and electric shock while the clamp
core jaw is open, make sure that conductors to be
measured are insulated with material conforming to (1)
Overvoltage Category III
Basic Insulation Requirements for Working Voltages of 150
V.
Refer to the following standards regarding the meanings of
underlined terms.
IEC 61010-1
IEC 61010-2-031
IEC 61010-2-032
To avoid short circuits and potentially life-threatening
hazards, never attach the clamp to a circuit that operates
at more than the maximum rated voltage (voltage to
ground) / 150V, or over bare conductors.
Clamp on leak sensor should only be connected to the
secondary side of a breaker, so the breaker can prevent an
accident if a short circuit occurs. Connections should
never be made to the primary side of a breaker, because
unrestricted current flow could cause a serious accident if
a short circuit occurs.
Do not allow the product to get wet, and do not take
measurements with wet hands. This may cause an electric
shock.
To avoid electric shock w hen measuring live lines, wear
appropriate protective gear, such as insulated rubber
gloves, boots and a safety helmet.
Note that the product may be damaged if voltage
exceeding the selected measurement range is applied for a
long time.
Before using the product, make sure that the insulation on
the cable is undamaged and that no bare conductors are
improperly exposed. Using the product in such conditions
could cause an electric shock, so contact your dealer or
Hioki representative for repair.
To avoid electric shock w hen measuring the ground
conductor on an E (PE) transformer connection site, be
careful not to approach high voltage devices or
conductors. Also, if close to high voltage charging
devices or if measurement is otherwise difficult, first
change the route of the grounding wire.
Avoid stepping on or pinching the cable, which could damage
the cable insulation.
Keep the cables well away from heat sources, as bare
conductors could be exposed if the insulation melts.
Never plug in or unplug the sensor connector when the
measuring conductor is the core. The power meter or the
sensor may fail.
Do not store or use the product where it could be exposed to
direct sunlight, high temperature or humidity, or condensation.
Under such conditions, the product may be damaged and
insulation may deteriorate so that it no longer meets
specifications.
To avoid damage to the product, protect it from vibration or
shock during transport and handling, and be especially c areful
to avoid dropping. The product could be damaged or its
performance degraded.
This is a precision product: to avoid damage, do not clamp any
foreign objects in the end of the clamp core, or insert anything
in the core gap.
This product is not designed to be entirely water- or dust-proof.
To avoid damage, do not use it in a wet or dusty environment.
This product is designed for indoor use, and operates reliably
from 0 to 50 .
Adjustments and repairs should be made only by technically
qualified personnel.
and not more than 150 V, to
, (2) Pollution Degree 2, and (3)
WARNING
CAUTION
NOTE
Correct measurement may be impossible in the presence of
strong magnetic fields, such as near transformers and highcurrent conductors, or in the presence of strong
electromagnetic fields such as near radio transmitters.
Common Electric Circuits and Coordination of Insulation
The maximum rated voltage to earth for the Model 9658 is
voltage relative to ground. Correlation with the nominal voltage
of common electric circuits is defined by IEC 60664 according
to the maximum anticipated transient overvoltage (impulse
voltage) for the electric circuit being m easured.
Three-phase
Four-wire
120/208
120/240
Coordination of insulation: determination of the safe and
Voltage to ground: the voltage between a power line and earth
Three-phase
Three-wire
240 150 2500
ground in a grounding-dependent electric
circuit, or the voltage between one power line
and any other power line in a groundingindependent circuit.
Voltage to
Ground
appropriate characteristics of electrical
insulation of wiring and connected devices
according to the operating voltage.
Recommended Impulse
CATIII
Withstand Voltage
Part Names
Jaws
Output connector
Cable
Measurement Procedure
2
2
3
R
O
A
Maximum
Effect
p
Effect
m
R
c
D
Maximum
to
O
a
S
a
L
S
D
c
C
E
Mass
A
Pre-Operation Inspection
Before using the product the first time, verify that it operates
normally to ensure that the no damage occurred during storage or
shipping. If you find any damage, contact your dealer or Hioki
representative.
WARNING
Before using the product, make sure that the insulation on
the cable is undamaged and that no bare conductors are
improperly exposed. Using the product in such conditions
could cause an electric shock, so contact your dealer or
Hioki representative for repair.
Measurement Procedure
CAUTION
When unplugging the cable from the product, grasp the output
connector, not the cable, in order to avoid damaging the cable.
1. Connect the output connector to the clamp terminal of the
product.
2. Open the jaws, then clamp the conductor.
3. Make sure that the tips of jaws are fully closed.
Connections method
Clamp the tester on the conductor, so that the conductor passes
through the center of the clamp core. For measurement of
grounded leads, clamp the tester on one lead only (see a). For
overall measurements, clamp the tester on the entire circuit path
(see b).
single-phase 3-lead circuits
Transformer
Ig: leak Current
three-phase 3-lead
circuits
a
Ig
E
E (PE)
clamp all three leads of the circuit
b
Ig
a
E
E (PE)
NOTE
For measurement of single-phase 2-lead circuits, clamp both
leads of the circuit.
For measurement of three-phase 4-lead circuits, clamp all four
leads of the circuit. If this is not possible, the measurement
can also be carried out on the ground lead of the equipment.
If a s trong current (on the order of 100 A) is flowing in an
adjacent circuit, accurate measurement may not be possible.
Perform the measurement at a sufficient distance from other
current-carrying conductors.
The frequency of special waveforms such as at the secondary
side of an inverter may not be indicated correctly.
Do not input a current which exceeds the maximum permissible
input.
clamp all three leads
b
b
b
of the circuit
Load
device
Load
device
a
PE
Checking for insulation faults
Normally, for an E (PE) grounding installation of a transformer, the
measurement will first be made to check for overall circuit leak
current in the ground lead (a). Current changes can be used to
diagnose the leak current condition.
When leak current has been detected, the measurement should
proceed from the power source towards the load, using overall
measurement.
1. If an insulation fault in the wiring has occurred at position A in
the illustration, leak current will be detected at position b using
overall measurement, but not at position b'.
2. If an insulation fault in the load equipment has occurred at
position B in the illustration, leak current will be detected at
position c using overall measurement, but not at position c'.
3. For detection of intermittent leak current conditions (such as
only when a certain piece of equipment is operating), the use of
a level recorder will be helpful.
single-phase 3-lead
circuits
b′
b
Specifications
Accuracy is guaranteed at 23
one year, or opening and closing of the clamp sensor 10,000 times,
whichev er comes first.
ated current 1.0 AAC (f.s.)
utput voltage 25 mVAC/A
mplitude accuracy
input current 30 A continuous at 45 to 66 Hz
of conductor
osition
of external
agnetic fields
emaining electric
urrent character
5 (73 9 ) and 80% RH max for
3.5% rdg. 12μV (45 to 66 Hz)
(Regarding the accuracy: refer to the
specification of the each product that
you use with this clamp on sensor)
within 0.4% (in any direction from
sensor center)
400 AAC/m corresponds to 5 mA, max.
7.5 mA
1 mA max. (in 10 A go and return
electric wire)
ielectric strength 2224 VrmsAC for 15 seconds
cc′
a
Ig
E (PE)
A
Load
device
Load
device
B
earth
perating temperature
nd humidity
rated voltage
torage temperature
nd humidity
ocation for use
(between electric circuit and case)
Within 150 Vrms (Insulation conductor)
0to50 (32to122 ), within 80%RH (no
condensation)
-10to60 (14to140 ), within 80%RH
(no condensation)
Altitude up to 2000 m (6562 feet), Indoors
tandards applying
EMC
Safety
EN 61326
EN 61010
Measrement Category III, Pollution
Degree 2 (anticipated transient
overvoltage 2500 V)
iameter of measurable
Within 10 mm x 28 mm (0.39" x 1.10")
onductor
able length
Approx. 3 m (118.11")
xternal dimensions Approx. 65W x 52H x 18D m m
(2.56"W x 2.05"H x 0.71"D)
(excluding protrusions)
Approx. 100 g (3.5 oz.)
ccessories Instruction manual
Maintenance and Service
Cleaning the product
Gently wipe dirt from the surface of the product with a soft cloth
E
moistened with a small amount of water or mild detergent.
Do not try to clean the product using cleaners containing organic
solvents such as benzine, alcohol, acetone, ether, ketones,
thinners, or gasoline. They may cause discoloration or damage.
Service
If the product is not functioning properly, check the probe. If a
problem is found, contact your dealer or HIOKI representative.
Pack the product carefully so that it will not be damaged during
transport, and write a detailed description of the problem. HIOKI
cannot bear any responsibility for damage that occurs during
shipment.
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