Hioki 3273-50 User manual

Barcode(30×6ｍｍ)
600027354
EN
3276
CLAMP ON PROBE
3273-50
Instruction Manual
Apr. 2015 Revised edition 4
3276A981-04 15-04H

3276A981-04
Contents
Introduction i
Inspection i
Notes on Safety i
Notes on Use iii
Chapter 1 Overview 1
1.1 Product Overview 1
1.2 Features 1
1.3 Names of Parts 2
1.4 Parts of the Sensor 2
Chapter 2 Specifications 5
2.1 Product Specifications 5
2.2 Standards Applying 7
Chapter 3 Measurement Procedure 11
3.1 Notes on Use 11
3.2 Preparations for Measurement 11
3.3 Demagnetizing and Zero Adjustment 12
3.4 Measurement Procedure 16

i
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Introduction
――――――――――――――――――――――――
WARNING
This deviceis 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.
Introduction
Inspection
Notes on Safety
Thank you for purchasing the HIOKI 3273-50,3276
CLAMP ON PROBE. To obtain maximum
performance from the device, please read this
manual first, and keep it handy for future reference.
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.
Supplied accessories
Instruction manual 1
3273-50 Soft case 1
3276 Carrying case 1

ii
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Notes on Safety
――――――――――――――――――――――――
The symbol printed on the device
indicates that the user should refer to a
corresponding topic in the manual (marked
with the symbol) before using the
relevant function.
In the manual, the symbol indicates
particularly important information that the
user should read before using the device.
Indicates that only insulated conductors
suited to the voltage of the circuit under
test can be measured.
Safety Symbols
This manual contains information and warnings
essential for safe operation of the device and for
maintaining it in safe operating condition. Before
using the device, be sure to carefully read the
following safety notes.

iii
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Notes on Use
――――――――――――――――――――――――
DANGER
Indicates that incorrect operation
presents an extreme hazard that could
result in serious injury or death to the
user.
WARNING
Indicates that incorrect operation
presents a significant hazard that could
result in serious injury or death to the
user.
CAUTION Indicates that incorrect operation
presents a possibility of injury to the user
or damage to the device.
NOTE Indicates advisory items related to
performance or correct operation of the
device.
Notes on Use
The following symbols in this manual indicate the
relative importance of cautions and warnings.
Follow these precautions to ensure safe operation
and to obtain the full benefits of the various
functions.
Preliminary Check
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.

iv
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Notes on Use
――――――――――――――――――――――――
DANGER
・ 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.
・ Refer to the derating characteristics when
measuring current that includes a
highfrequency component and never measure
any current that exceeds the rated current.
・ Use with high frequencies or strong magnetic
fields may cause the device to become
abnormally hot, resulting in fire, equipment
damage, or burns. (See “ 3 Specifications ”
(p5.))
・ Observe the following to avoid electric shock
and short circuits.
・ Connect the device to the 3269 or the 3272
Power Supply and waveform measurement
instrument (oscilloscope or recorder) first, and
then to the active lines to be measured
・ When the sensor is opened, do not shortcircuit
the conductor being measured or other two
wires with the metal part of the tip.
Be careful to avoid damaging the insulation
surface while taking measurements.

v
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Notes on Use
――――――――――――――――――――――――
DANGER
・ Before clamping the conductor being
measured,make sure that the insulation on the
conductor isundamaged. Also, take care not to
damage theinsulation when clamping the
conductor. Any damageto the insulation could
cause an electric shock.
This instrument is made for use with the 3269
or 3272 POWER SUPPLY.
To prevent fire or damage of the measurement
target and device as well as burns, exercise
caution concerning the following when
measuring high-frequency currents or currents
that contain high-frequency components:
Eddy current loss may cause heating of the
sensor head.
Dielectric heating may cause heating of cord
insulation and other materials.
This device 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.

vi
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Notes on Use
――――――――――――――――――――――――
DANGER
Be sure to observe all operating precautions for
the waveform monitoring instrument
(oscilloscope or recorder) and other
measurement instruments to which this device
is connected.
When using a measurement instrument that
does not provide isolation between its input
terminals and chassis or other input terminals,
please pay attention to the following points.
If a signal is applied to an input terminal other
than that to which this device is connected, do
not connect the ground-side terminal to any
non-ground potential. Otherwise, short-circuit
current will flow through the 3269,3272 or this
device from the ground terminal, which could
cause an electrical accident or damage.