
Introduction
Warranty
Warranty malfunctions occur ring unde r co nditions o f 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.
9010-50,9018-50
CLAMP ON PROBE
Instruction Manual
August 2015 Revised edition 4
Printed in Japan
9010F981-04 15-08H
Thank you for purchasing the HIOKI Model 9010-50, 9018-50
Clamp on Probe. To obtain maximum performance from the device, please read this manual first, and keep it handy for future
reference.
Overview
The 9010-50 and 9018-50 are voltage output type clamp on
probes, which are applicable to 500 A AC current measurements. These probes can be used to measure alternating current on a live power line without the need to cut the wire. Easy
operation and connection make them useful for measuring a lternating current and power in various fields.
Inspection and Maintenance
Initial Inspection
When you receive the device, 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.
1234
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 gasoline, as they can deform and discolor the case.
• Measurements are degraded by dirt on the mating surfaces
of the jaws, so keep the surfaces clean by gently wiping with
a soft cloth.
• If the device seems to be malfunctioning, contacting your
dealer or Hioki representative.
Pack the device so that it will not sustain damage during shipping, and include a description of existing damage. We do not
take any responsibility for damage incurred during shipping.
Safety
This manual contains information and warnings essential for
safe operation of the device and for maintaining it in safe operating condition. Before using it, be sure to carefu lly read the fo llowing safety precautions.
• This device is designed to comply with IEC
61010 Safety St andards, 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. Using the device in a way not
described in this manual may negate the
provided safety features.
Be certain that you understand the instructions and precautions in the manual before
use. We disclaim a ny re sponsibility for a
ccidents or injuries not resulting directly
from device defects.
• To avoid short circuits and potentially lifethreatening hazards, never attach the
device to a circuit that operates at more
than 600 V, or over bare conductors.
Safety Symbols
Indicates cautions and hazards. When the symbol is
printed on the device, refer to a corresponding topic in the
Instruction Manual.
Indicates that the device may be connected to or disconnected from a live circuit.
Indicates a double-insulated device.
Indicates AC (Alternating Current).
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 device.
Indicates advisory items related to performance or correct operation of the device.
Other Symbols
This symbol indicates that the product conforms to regulations set out by the EC Directive.
Indicates a prohibited action.
Measurement categories
To ensure safe operation of measuring instruments, IEC 61010
establishes safety standards for various electrical environments, categorized as CAT II to CAT IV, and called measurement categories.
• Using a measuring 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.
• Using a measuring device without categories in an
environment designated with the CAT II to CAT IV
category could result in a severe accident, and
must be carefully avoided.
This device complies with CAT III safety requirements.
CAT II :When directly measuring the electrical outlet recepta-
CAT III :When measuring the primary electrical circuits of
CAT IV: When measuring the circuit from the service drop to
cles of the primary electrical circuits in equipment connected to an AC electrical outlet by a power cord
(portable tools, household appliances, etc.)
heavy equipment (fixed installations) connected
directly to the distribution panel, and feeders from the
distribution panel to outlets
the service entrance, and to the power meter and primary overcurrent protection device (distribution panel)
Instrument Installation
Storage temperature and humidity
: -10 to 60°C (14 to 140°F), 80%RH or less (no condensation)
Operating temperature and humidity
: 0 to 50°C (32 to 122°F), 80%RH or less (no condensation)
Avoid the following locations that could cause an accident or damage to the device.
Exposed to direct
sunlight
Exposed to high temperature
Exposed to water, oil,
other chemicals, or
solvents
Exposed to high
humidity or condensation
Exposed to high
levels of particulate
dust
Subject to vibration
In the presence of
corrosive or
explosive gases
Exposed to strong
electromagnetic
fields
Near electromagnetic
radiators
Near induction
heating systems
(e.g., high-frequency
induction heating
systems and IH
cooking utensils)
Usage Notes
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
• Clamp-on probe 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.
• To avoid electric shock, do not touch the portion
beyond the protective barrier during use.
• Do not allow the device to get wet, and do not take
measurements with wet hands. This may cause an
electric shock.
• To avoid electric shock when measuring live lines,
wear appropriate protective gear, such as insulated rubber gloves, boots and a safety helmet.
• Avoid measuring at frequencies in excess of the
derating range, as this will generate heat in the
jaws and is dangerous.
• Note that the device may be damaged if current exceeding
the selected measurement range is applied for a long time.
• Be careful to avoid dropping the device or otherwise subjecting them to mechanical shock, which could damage the mating surfaces of the jaws and adversely affect measurement.
• Do not store or use the device where it could be exposed to
direct sunlight, high temperature or humidity, or condensation. Under such conditions, the device may be damaged
and insulation may deteriorate so that it no longer meets
specifications.
• Keep the jaws tip and core slits free from foreign objects,
which could interfere with clamping action.
• Measurements are degraded by dirt on the mating surfaces
of the jaws, so keep the surfaces clean by gently wipin g with
a soft cloth.
• To avoid breaking the cables, do not bend or pull them.
• Avoid stepping on or pinching cables, which could damage
the cable insulation.
• Keep the cables well away from heat sources, as bare conductors could be exposed if the insulation melts.
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 electromagnetic
fields such as near radio transmitters.

Names of Parts
Output connector
Jaws
Cable
Range switch
Protective barrier
1. Align the grooves in the BNC connector with the guide pins
on the connection equipment input connector, then turn
clockwise while pressing in to lock the connector.
To remove from the connection equipment, turn the BNC
connector counterclockwise to release the lock, then pull it.
2. When input the unknown amount of measuring current, set
the range to the largest one (500 A).
Groove of the BNC
Connector guide
3. Open the jaws and clamp the conductor so that the conduc-
tor is approximately centered between the jaws. When also
measuring waveform phase with a recorder or such pro duct,
use the 9018-50 and clamp in such a way that the direction
of current flow matches the direction of the clamp section's
current direction indicator arrow to ensure that the measur ed
current and output voltage are in phase with one another.
The 9010-50 is designed for level measurement and does
not have a current direction mark.
4. Confirm whether the jaws tip connection part is closed cer-
tainly.
5. Set the proper range of the clamp on probe according to the
measurement value.
LOAD
L
O
A
D
S
O
UR
CE
Electric
conductor
Current direction indicator
When using the 9018-50, position the
clamp with the current direction indicator pointing toward the load side.
(If installed in the opposite direction,
the phase deviates 180 degrees.)
Wiring example
SOURCE
I
Hi
Lo
10 100
1 k
10 k
100
200
300
0
400
500
600
700
5 k
40
3 k
Maximum input current (Arms)
Frequency (Hz)
Product
9010-50, 9018-50
Clamp on Probe
9704
Conversion
Adapter
Measurement Procedure
Preliminary Checks
Before using the device for the first time, verify that it operates
normally to ensure that no damage occurred during storage or
shipping. If you find any damage, contact your dealer or Hioki
representative.
Before using the device, make sure that the insulation on the probes is undamaged and that no bare
conductors are improperly exposed. Using the
device in such conditions could cause an electric
shock, so contact your dealer or Hioki representative for repair.
When disconnecting the BNC connector, be sure 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.
Set the product being connected to (such as a recorder or
tester) to a range which can measure 0.2 V AC.
5 678
• Attach the clamp around only one conductor. Single-phase (2wire) or three-phase (3-wire) cables clamped together will not
produce any reading.
• Note that a DC component will result in an erroneous reading.
• Ground-shielded conductors canno t be accurately measured.
• Ensure that the input resistanc e of the measuring instrument
being combined with is sufficiently high (1 M or greater is
recommended).
• Also read the instruction manual for whichever product you
connect to.
Specifications
f.s. :maximum display value or scale length (This is usually the
maximum value of the currently selected rang e. )
rdg. :reading value (The value currently being measured and in-
dicated on the measuring device.)
1. General Specifications
Operating
environment
Operating temperature and humidity
Storage temperature and humidity
Maximum rated
current
Maximum rated
voltage to earth
Dielectric strength 7060 V rms AC (Sensitive current 1 mA),
Applicable Standards
2. Specifications
Measuring range 10/20/50/100/200/500 A AC
Output voltage 0.2 Vf.s.
Maximum input
current
Conditions of
guaranteed
accuracy
9010-50 Basic accuracy
(45 Hz f 66 Hz)
Frequency characteristics
9018-50 Basic accuracy
(45 Hz f 66 Hz)
Frequency characteristics
Temperature coefficient
Effect of conductor
position
9010-50
9018-50
Effect of external
magnetic fields
9010-50
9018-50
Output connector BNC connector
Measurable con-
ductor diameter
Dimensions Approx. 78W×188H×35D mm
Mass Approx. 420 g (14.8 oz.)
Cable length Approx. 3 m
Accessories Instruction manual
Indoors, Up to 2000 m (6562ft) ASL
0 to 50°C (32 to 122°F), 80%RH max.
(no condensation)
-10 to 60°C (14 to 140°F), 80%RH max.
(no condensation)
500 A rms
600 V AC (50 Hz/60 Hz)
50 Hz/60 Hz, 1 minute, between the jaws and the
output connector
Safety EN61010
EMC EN61326
(50/60 Hz, continuous, Inside of derating range)
150 Arms (10/20/50 A range)
400 Arms (100/200 A range)
650 Arms (500 A range)
Guaranteed accuracy period: 1 year
Guaranteed accuracy period from adjustment
made by Hioki: 1 year
Opening and Closing of the jaws: Maximum 10000 times
Temperature and humidity for guaranteed accuracy
: 23°C±5
Within ±0.05% rdg./°C
(at 100 A/55 Hz input, using with the conductor 10
mm diameter)
Within ±2%
Within ±0.5%
(in an AC electromagnetic field of 400 A/m, 60 Hz)
1 A equivalent or less
100 mA equivalent or less
Less than 46 mm (1.81”)
(3.07”W×7.40”H×1.38”D)
(Without protrusions, cord)
Pollution degree 2
Measurement category III
(anticipated transient overvoltage 6000 V)
°C (73°F±9°F)
(sine wave current input; jaws center
position; common for all ranges;
Inside of derating range)
±2% rdg.±1%f.s.
(at 40 Hz f 1000 Hz, adds to the
basic accuracy)
±6% rdg. (10/20 A range)
±3% rdg. (50/100/200/500 A range)
(sine wave current input; jaws center
position; common for all ranges;
Inside of derating range)
±1.5% rdg.±0.1%f.s.
(at 40 Hz f 3000 Hz, adds to the
basic accuracy)
Amplitude ±1% rdg.
Phase ±2.5deg.
, 80%RH or less
3. Derating
Option
9704 Conversion Adapter
This adapter changes the 9010-50 or 9018-50 o utput connector
to a banana plug type. It is needed to connect to products with
DMM or banana plug inputs.
The banana plug has a safety cover att ached and may there fore
not be compatible with the shapes of the input connectors on
some products.