9657-10
CLAMP ON LEAK SENSOR
Instruction Manual
September 2015 Revised edition 8
Printed in Japan
9657B981-08 15-09H
Overview
Safety
Usage Notes
Warranty
Warranty m alfunctions oc curring under conditi ons of normal us e 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 9657-10 CLAMP ON
LEAK SENSOR.
product, please read this manual first, and keep it handy for
future reference.
To obtain maximum performance from the
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.
Preliminary Check
Before using the pro du ct th e fi rs t tim e , v eri fy that it op er ate s
normally to ensu re t hat t he n o da mage occur red d ur in g stor age or shipping. If you find any damage, contact your dealer
or Hioki representative.
• Before using the product, make sure that the insulation on
the cables 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.
Maintenance and Service
• To clean the product, wipe it gently with a soft cloth moistened with water or mild detergent. Never use solv ents such
as benzene, alcohol, acetone, ether, ketones, thinners or
gasoline, as they can deform and discolor the case.
• If the product seems to be malfunctioning, confirm that the
cables are not open circuited before contacting your
dealer or Hioki representative. When sending the product
for repair, pack the produc t carefully so th at it will not be
damaged du ring shipment, an d include a detail ed written
description of t he pro bl em. Hiok i ca nnot b e r esp ons ible f or
damage that occurs during shipment.
The 9657-10 is a voltage output type clamp on sensor
compatible to 10A AC measurements. The instrument
can be relied upon to measure subtle current with great
accuracy due to the high magnetic permeability material
used for the core and magnetic shield.
Specific ations
Accuracy is guaranteed for one year at 23±5°C (73±9°F)
and Max. 80% RH. (Opening and Closing of the Sensor:
Maximum 10000 times)
Guaranteed accuracy period after adjustment made by
Hioki: 1 year
Rated current 10 A AC
Output voltage 100 mV AC/A
Amplitude accuracy
Phase accuracy within ±3°(at 50 Hz, 60 Hz, MeaMaximum input current 30 A continuous at 45 to 66 Hz
Measurable conductor Insulated conductor
Effect of conductor
position
Effect of external
magnetic fields
Remaining electric
current character
Operating temperature
and humidity range
Storage temperature and
humidity range
Location for use Altitude up to 2000 m (6562 feet),
Standards applying
Safety
Diameter of measurable
conductor
Cable length Approx. 3 m (118.11")
External dimensions Approx. 74W x 145H x 42D mm
Mass Approx. 380 g (12.2 oz.)
Accessories Instruction manual
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 the full length of the
scale.
This is usuall y the maximum value of th e currently selected
range.
• rdg. (reading or displayed value)
The value currently being measured and indicated on the
measuring product.
±1.0% rdg.±0.05% f.s. (f.s.: 10 A)
(at the Jaw cen te r, 45 to 66 H z)
surement current: Min. 1 A)
(Ambient temperature: 50°C
±0.1%
within
(in any direction from sensor center)
400 A AC/m corresponds to 5 mA,
Max. 7.5 mA
Max. 5 mA
(in 100 A go and return electric wire)
0 to 50°C (32 to 122°F)
Max. 80%RH (no condensation)
-10 to 60°C (14 to 140°F)
Max. 80%RH (no condensation)
Indoors
EMC
EN 61326
EN 61010
Pollution Degree 2
Within φ 40 mm (1.57")
2.91"W x 5.71"H x 1.65"D
(excluding protrusions)
)
This manual contains information and warnings essential
for safe operation of the product and for maintaining it in
safe operating condition. Before using the product, be
sure to carefully read the following safety notes
This product is designed to conform to IEC 61010
Safety Standards, and has been thoro ughly tested
for safety prior to shipment. However, mishandling
during use coul d re sul t in injury or d eat h, 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.
Symbols affixe d to device
Indicates cautions and hazards. When the symbol is
printed on the device, refer to a corresponding topic
in the Instruction Manual.
Indicates AC (Alternating Current).
Indicates that only insulated conductors suited to the
voltage of the circuit under test can be measured.
Symbols for various standards
IThis symbol indicates that the product conforms to
regulations set out by the EC Directive.
Indicates the Waste Electrical and Electronic Equipment Directive (WEEE Directive) in EU member
states
The following symbols in this manual indicate the relative
importance of cautions and warnings.
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 product.
Advisory items related to performance or correct
operation of the product.
Follow these precautions to ensure safe operation and to
obtain the full benefits of the various functions
Do not measure around a bare conductor . Doing so
may result in short-circuit or electric shock. Take
measurements at a location on an insulated wire
where there is sufficient insulation for the circuit
voltage.
.
• To avoid electri c shock, do not allow th e product to
get wet, and do not use it when your hands are wet.
• To avoid electric shock when measuring live lines,
wear appropriate protective gear, such as insulated rubber gloves, boots and a safety helmet.
• To avoid electric shock when measuring the
ground conductor on a transformer Class 2 connection site, be careful not to approach high voltage devices or conductors. Also, if close to high
voltage charg ing de vices or if measu rement is oth erwise difficult, first change the route of the
grounding wire.
2. Leak Current Measurement
• Do not store or use the product where it could be ex-
OK
Line
SOURCE
LOAD
Current direction
arrow in the
direction of the load .
Single-phase 3-lead circuits
Clamp all three leads
of the circuit
b
b
a
Load
Device
lg
Transformer
E (PE)
lg: Leak Current
Three-phase 3-lead circuits
Clamp all three leads
of the circuit
lg
a
b
b
a
E (PE)
PE
Load
Device
Single-phase 3-lead circuits
bb’
a
c
c’
Load
Device
B
A
lg
Load
Device
E (PE)
Jaws
Barrier
Cable
Ferrite core
BNC
connector
core
posed 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 tran sport and handli ng, and be especially careful to avoid dropping.
• Be careful to avoid dropping the product or otherwise
subjecting them to mechanical shock, which could
damage the mating surfaces of the jaw and adversely
affect measurement.
• Keep the clamp jaws and jaws slits free from foreign
objects, which could interfere with clamping action.
• Keep the jaws closed when not in use, to avoid accumulating dust or dirt on the mating core surfaces,
which could interfere with clamp performance.
• Measurements ar e degraded by dirt on the mating surfaces of the clamp-on sensor, so keep the surfaces
clean by gently wiping with a soft cloth.
• 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°C to 50°C.
• This product should be installed and operated indoors
only, between 0 and 50°C and 80% RH or less
• 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.
• To avoid damaging the sensor cable, do not bend or
pull the cable.
• Note that the product may be damaged if current exceeding the selected measurement range is appli ed for
a long time
Measurement Procedure
• When disconnecting the BNC conne ctor , be sur e to release the lock before pulling off the connector. Forcibly
pulling the connector without releasing the lock, or pulling on the cable, can damage the connector.
• To prevent damage to the product and sensor, never
connect or disconnect a sensor while the power is on,
or while the sensor is clamped around a conductor.
1. Load Current Measurement
Attach the clamp around only one conductor. Single-phase (2-wire) or
three-phase (3-wire) cables clamped together will not produce any
reading.
When making the phases of the measurement current and
output voltage the same, clamp the jaws of the sensor
onto the conductor so that the current direction on the
clamp points in the direction of the load, and so that the
conductor is approximately centered between the jaws.
Make sure that the tips of jaws are fully cl osed.
Connections method
Clamp the tester on the conductor, so that the conductor
passes through the center of the jaw. For measurement of
grounded leads, clamp the tester on one l ead only (see a) .
For overall measurements, clamp the tester on the entire
circuit path (see 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.
Parts Names
• Align the BNC connector with the connector guide
notch on the current input connector. While pushing the
connector in, turn it to the right to lock it.
• Open the jaws, and clamp the sensor onto the conductor.
• Make sure that the tip s of jaws are fully closed.
• For measurem ent of singl e-phase 2-l ead circuits , clamp both le ads
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 strong 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 rated current.
Checking for insulation faults
Normally, for a 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'.
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