Hioki 9272-10 Instruction Manual

°

9272-05
9272-10

CLAMP ON SENSOR

Instruction Manual

Feb. 2017 Revised edition 5

Printed in Japan

9272C981-05 17-02H

EN

Jaws

Cable

Range switch

Barrier

Output connector

9272-05

Output connector

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 Model 9272-05 and 9272­10 CLAMP ON SENSOR. To obtain maximum performance
from the device, please read this manual first, and keep it handy
for future reference.

Inspection and Maintenance

Initial Inspection

When you receive the device, inspect it carefully to ensure that
no damage occurred during shipping. In particular, check the
accessories, panel switches, and connectors. If damage is evi­dent, or if it fails to operate according to the specifications, con­tact 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 cannot
accept 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 carefully read the fol­lowing safety precautions.

• This device 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
device. 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
device defects.

• To avoid short circuits and potentially life­threatening hazards, never attach the device
to a circuit that operates at more than 600V.

Safety Symbols

Indicates cautions and hazards. When the symbol is
printed on the product 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 Symbol

Indicates a prohibited action.

Measurement categories

This device complies with CAT III safety requirements.
To ensure safe operation of measurement devices, IEC 61010 es­tablishes safety standards for various electrical environments, cat­egorized as CAT II to CAT IV, and called measurement categories.

CAT II: Primary electrical cir-

cuits in equipment
connected to an AC
electrical outlet by 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 installa-

tions) connected directly to the distribution panel, and feeders
from the distribution panel to outlets.

CAT IV:The circuit from the service drop to the service entrance, and

to the power meter and primary overcurrent protection device
(distribution panel).

Using a measurement 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.Use of a
measurement instrument that is not CAT-rated in CAT II to CAT IV
measurement applications could result in a severe accident, and must
be carefully avoided.

Instrument Installation

Operating temperature and humidity: 0 to 50°C, 80%RH or less (non-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 liquids
Exposed to high humid­ity or condensation

Exposed to high levels
of particulate dust

In the presence of
corrosive or explosive
gases

Exposed to strong
electromagnetic fields
Near electromagnetic
radiators

Subject to vibration

Usage Notes

Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.

• Clamp 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.

• To avoid electric shock, short circuits and damage to
the device, observe the following precautions:
Check the position of the range switch before taking
measurements.
Disconnect the conductor from the measurement
object before switching ranges.

• 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.

• 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.

• Note that the device may be damaged if current exceeding
the selected measurement range is applied for a long time.

•

When the digital power meter or the clamp unit’s power
is turned off, do not apply current to the clamp sensor.

Doing so may damage the device.

• When disconnecting the 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.

• To prevent damage to the connected instruments and the
sensor, never connect or disconnect a sensor while the pow­er is on, or while the sensor is clamped around a conductor.

• To avoid damage to the device, protect it from physical shock
when transporting and handling. Be especially careful to
avoid physical shock from dropping.

• 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.

• Measurements are degraded by dirt on the mating surfaces
of the jaws so keep the surfaces clean by gently wiping 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 high­current conductors, or in the presence of strong electromag­netic fields such as near radio transmitters.

• This device may cause interference if used in residential areas.
Such use must be avoided unless the user takes special mea­sures to reduce electromagnetic emissions to prevent interfer­ence to the reception of radio and television broadcasts.

Overview

The 9272-05 and 9272-10 was developed for to provide a 20 A,
200 A clamp sensor. Together with the power meter, the 9272­10 makes it possible to measure alternating current in live pow­er lines without cutting into the lines.
The sensor features excellent amplitude-frequency response
and phase-frequency response, and is easy to connect and use.
Its versatility will find application in a wide variety of fields deal­ing with current and power measurement.

Names of Parts

Options

9705 Conversion Cable
CT9900 Conversion Cable

The Conversion Cable makes it possible to connect to and use
with products that cannot be directly connected to the 9272-05
or 9272-10. (Refer to “Connection example”) (No figures are
added to the accuracy.)

CT9902 Extension Cable*2(5 m), CT9903 Extension Cable*1(5 m)

• Single sensor cable, 5 m extension (max. 10 m extension)

• Up to two extension cable is connectable. (If three or more­extension cables are connected to the device, its perfor­mance is not guaranteed)

• Add the following values to each of the accuracy per cable:
Amplitude accuracy: ±0.1% rdg. (DC

Phase accuracy: ±(0.1 × f

*1: For 9272-10, *2: For 9272-05, *3: frequency

*1

, 9318 Conversion Cable*1,

*1

, CT9901 Conversion Cable

*3

 f

 1 kHz)

±0.5% rdg. (1 kHz

*3

kHz)° (1 kHz < f*3)

< f

*3

*2

)

Connection Example

Host instrument

3390, 3390-10,
9555-10,
9602 (3193-10),
3334-10

8971 (MR8847,
MR8827, MR8740)

8940 (8860-50)

PW6001, PW3390,
CT9555, CT9556,
CT9557

CT9901

9705

9318

CT9900

9318

9272-05

9272-10

Cannot be directly connected to any parenthesized models. A module
is required.
Refer to “Combined accuracy and conditions” specified in the specifi­cations.

L

O

A

D

S

O

U

R

C

E

Electric
conductor

Current direc­tion indicator

Position the jaws with
the current direction indi­cator pointing toward the
load side.
(If installed in the oppo­site direction, the phase
deviates 180 degrees.)

Wiring example

SOURCE

LOAD

I

Hi

Lo

OK

Shielded

9272-10

CT9900

Conversion Cable

CT9903 Extension Cable

9318

Conversion Cable

9705

Conversion Cable

9272-05

CT9901

Conversion Cable

CT9902 Extension Cable

20 A

10 100 1 k 10 k 100 k

1

100

200

300

20 k

0

50

200 A range

20 A range

Frequency (Hz)

Maximum input current (Arms)

40 A

Preliminary Checks

Before using the device 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.

Measurement procedure

At the start of measurement

1. Attach the device to the host instrument that is powered

off.

2. Turn on the host instrument.

3. Set the panel range switch to the appropriate current

range.

4. 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 jaws of the clamp are
fully closed.

When measurement is complete

1. Remove the jaws from the conductor.

2. Turn off the host instrument.

3. Detach the device from the host instrument.

In case of applying exceeded 430 A input such as rush cur­rent (it may reach more than ten times of rated current) while
the power of the measured unit is on, release the jaws to be
stationary condition (300 A max.) and then clamp it or use
with the Model 9290-10 Clamp on Adapter.

• Note that a DC component will result in an erroneous reading.

• Also note that operation will not be correct if the power fre­quency is very low (less than about 1 Hz).

• Ground-shielded conductors cannot be accurately measured.

• The circuit is such that a DC voltage is output briefly after the
power is turned on. Stabilization of the output takes about 30
seconds.

• Also read the instruction manual for whichever device you
connect to.

• Attach the clamp around only one conductor. Single-phase (2­wire) or three-phase (3-wire) cables clamped together will not
produce any reading.

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 clamp-on sensor, so keep the surfaces clean by gently
wiping with a soft cloth.

• If the device seems to be malfunctioning, confirm that the
batteries are not discharged, and that the test leads, probes
and fuse are not open circuited before contacting your dealer
or Hioki representative.

Specifications

f.s. :maximum display value or scale lengt
rdg. :reading value (The value currently being measured and in-

dicated on the measuring device.)
The specs except the output connector and options are the
same as respectively those of the 9272-05 and 9272-10.

1. General Specifications

Operating
environment

Operating temper­ature and humidity

Storage tempera­ture and humidity

Maximum rated
current

Maximum rated
voltage to earth

Applicable
Standards

Product warranty
period

Indoors, Pollution degree 2, Up to 2000 m (6562ft)
ASL

0°C to 50°C (32 °Fto 122°F), 80%RH max.
(no condensation)

-10°C to 60°C (14°F to 140°F), 80%RH max.
(no condensation)

200 A rms AC

600 V rms AC (50 Hz/60 Hz)

Measurement category III
(anticipated transient overvoltage 6000 V)

Safety

EN61010

EMC EN61326 Class A

1 year

2. Specifications

-1. 20 A range Specificons

Rated current 20 A rms AC
Output voltage 2 V/20 A
Maximum input

current

-2. 200 A range Specifications

Rated current 200 A rms AC
Output voltage 2 V/200 A
Maximum input

current

-3. 20 A/200 A range Specifications

Output impedance
Accuracy guaran-

tee for tempera­ture and humidity

Period of guaran­teed accuracy

Guaranteed
accuracy period
from adjustment
made by Hioki

Warm-up time 1 minute
Accuracy Within rated current for each range and inside of derating range

(The following accuracy values are merely design values: amplitude
at under 5 Hz and phase at under 10 Hz)
Sine wave input, conductor at jaws center position, not including
each effect, a measurement instrument with an input resistance of
1 MΩ or more

Frequency Amplitude accuracy Phase accuracy
1 Hz f < 5 Hz

5 Hz  f < 10 Hz ±1.0% rdg.±0.05% f.s. ±1.0°
10 Hz  f < 45 Hz ±0.5% rdg.±0.02% f.s. ±0.5°
45 Hz  f  66 Hz ±0.3% rdg.±0.01% f.s. ±0.2°
66 Hz< f  500 Hz
500 Hz< f  1 kHz ±1.0°
1 kHz< f  5 kHz ±1.0% rdg.±0.05% f.s. ±2.0°
5 kHz< f  10 kHz ±2.5% rdg.±0.10% f.s. ±3.0°
10 kHz< f  20 kHz
20 kHz< f  50 kHz ±15.0°
50 kHz< f  100 kHz ±30% rdg.±0.1% f.s. Accuracy not provided

Temperature
coefficient

Effect of conductor
position

50 A rms (71 Apeak, continuous, 50 Hz/60 Hz,
within a derating)

300 A rms
(430 A peak, continuous, 50 Hz/60 Hz, within a
derating)

50

 (±5%)

°C±5°C (73°F±9°F)

23

1 year (Opening and Closing of the jaws:

Maximum 10000 times)

1 year (Opening and Closing of the jaws:

Maximum 10000 times)

±2.0% rdg.±0.10% f.s. Accuracy not provided

±0.5% rdg.±0.02% f.s.

±5% rdg.±0.1% f.s.

Amplitude sensitivity: Within ±0.03% rdg./°C

Within ±0.2% rdg. (at 100 A/55 Hz input, using with
the conductor 10 mm diameter)

h (Rated current)

, 80%RH or less

±0.5°

±5.0°

Effect of external
magnetic fields

Effect of radiated

100 mA equivalent or less
(in an AC electromagnetic field of 400 A/m, 60 Hz)

1% f.s. at 10 V/m
radio-frequency
electromagnetic
field

Measurable con-

46 mm (1.81”) or less
ductor diameter

Rated supply
voltage

Power supply
capacity

Rated power

±11 V to ±15 V (Tracking)

Within ±200 mA(200 A/55 Hz measurement, with

±12 V power supply)

5 VA or less (200 A/55 Hz measurement, with ±12

V power supply)
Output connector 9272-10: Hioki PL23 (Male)

9272-05: Hioki ME15W (Male)
Dimensions Approx. 78 W×188 H×35 D mm

Approx. 3.07” W×7.40 ”H×1.38 ”D

(Without protrusions, cord)
Mass Approx. 450 g (15.9 oz.)
Cable length Approx. 3 m
Accessories Model 9355 CARRYING CASE

Instruction manual

Mark bands (6)
Option

3. Derating

Measurement Procedure

Combined accuracy and conditions

Combined accuracy = Accuracy of 9272-05 (-10) + Accuracy of combined
product (Power factor: 1)

Combined product

CT9555,CT9556,CT9557

Sensor Unit

PW3390 Power Analyzer

PW6001 Power Analyzer

9602 AC/DC Clamp Input Unit

3334-10 AC/DC Power HiTester CT9901

8940 F/V Unit

8971 Current Unit

9555-10 Sensor Unit CT9901

3390,3390-10 Power Analyzer CT9901

＊ 1: Add the sensor unit output accuracy to the combined accuracy when one

of the addition functions, that is, RMS output or TOTAL OUTPUT, is used.

＊ 2: Add ±0.1% rdg. to the combined accuracy
＊ 3: The sensor recognition methods vary according to the Memory HiCorder

settings (refer to the manuals of Memory HiCorder to be connected).

*1

*2

*3

*3

CT9901+9705+9318

CT9901+9318 9318

Required option

9272-05 9272-10

ー

ー

ー

CT9901

CT9900

CT9900

CT9900

ー

ー

9705+9318

ー

ー