Hioki CM4371 Manual de usuario
EN
Aug. 2017 Revised edition 3
CM4371A961-03 17-08H
Instruction Manual
CM4371
CM4372
CM4373
CM4374
AC/DC CLAMP METER
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CM4371A961-03
Contents
Introduction................................................................................................................1
Options (sold separately)..........................................................................................3
Safety Notes ...............................................................................................................4
Usage Notes ...............................................................................................................8
Part Names ...............................................................................................................11
Insert/Replace Batteries..........................................................................................12
Inspection Before Measurement.............................................................................14
Current Measurement..............................................................................................15
Manual Hold / Auto Hold..........................................................................................16
Switching ranges .....................................................................................................19
Filter Function..........................................................................................................20
MAX/MIN/AVG/PEAK................................................................................................21
Simultaneous display of DC current/voltage peak values...................................22
Backlight / Auto Power Save (APS)........................................................................24
Rush current (INRUSH)............................................................................................25
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Contents
Other Measurement Functions...............................................................................26
Voltage .............................................................................................................26
Continuity Check ............................................................................................27
Resistance.......................................................................................................27
Diode................................................................................................................27
Capacitance.....................................................................................................28
Temperature ....................................................................................................28
Electric Charge Detection..............................................................................29
Simultaneous display of DC current and DC voltage..................................29
DC power.........................................................................................................29
Bluetooth
®
Communications (only for CM4372, CM4374) ..................................................30
Power-on Option Table............................................................................................35
Repairs, Inspections, and Cleaning .......................................................................37
6SHFL¿FDWLRQV...........................................................................................................40
Accuracy Table.........................................................................................................46
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1
Introduction
Introduction
Thank you for purchasing the Hioki CM4371, CM4372, CM4373, CM4374 AC/DC
Clamp Meter. To obtain maximum performance from the instrument, please read this
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This instrument is a clamp meter that can perform true RMS measurement of current
simply by clamping it around a circuit. In addition to current, it provides voltage
measurement, frequency measurement, rush current measurement, resistance
measurement, diode measurement, capacitance measurement, temperature
measurement, voltage detection, and DC power measurement.
The CM4372 and CM4374 also provide Bluetooth communications functionality,
allowing measurement data to be monitored and logged from a smartphone or tablet.
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Introduction
Package contents
AC/DC Clamp Meter L9207-10 Test lead
C0203 Carrying Case
LR03 Alkaline battery × 2
Instruction Manual*
Precautions Concerning Use of
Equipment That Emits Radio Waves
(only for CM4372, CM4374)
* Instruction manuals may also be available in other languages.
Trademark
Bluetooth®is a registered trademark of Bluetooth SIG, Inc.(USA). The trademark is used by HIOKI E.E.
CORPORATION under license.
Androidand Google Play are registered trademarks of Google, Inc.
IOS is a registered trademark of Cisco in the U.S. and other countries.
iPhone, iPad, iPad mini, iPad Pro, and iPod Touch are trademarks of Apple Inc.
The App Store is a service mark ofApple Inc.
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Options (sold separately)
Options (sold separately)
L4933 Contact Pin Set *6
L4934 Small Alligator Clip Set *5
L4935 Alligator Clip Set *2
9243 Grabber Clip
*3
L4936 Bus Bar Clip Set *4
L4937 Magnetic Adapter Set
*3
L4932 Test Pin Set *1
L9207-10 Test lead *1
L4930 Connection Cable Set *2
(Length: 1.2 m)
L4931 Extension Cable Set *2
(Length: 1.5 m, with the
coupling connector)
DT4910 Thermocouples (K)
L4938 Test Pin Set *7
L4939 Breaker Pin Set *4
*1: CAT IV 600 V/ CAT III 1000 V/ CAT II 1000 V *4: CAT III 600 V
*2: CAT IV 600 V/ CAT III 1000 V *5: CAT III 300 V/ CAT II 600 V
*3: CAT III 1000 V *6: 33 V AC/ 70 V DC
*7: CAT III 600 V/ CAT II 600 V
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Safety Notes
Safety Notes
This instrument is designed to conform to IEC 61010 Safety Standards, and has been
thoroughly tested for safety prior to shipment. However, using the instrument in a way not
described in this manual may negate the provided safety features.
Before using the instrument, be certain to carefully read the following safety notes.
DANGER
Mishandling during use could result in injury or death, as well as damage to the
instrument. Be certain that you understand the instructions and precautions in
the manual before use.
WARNING
With regard to the electricity supply, there are risks of electric shock, heat
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electricity measuring instruments are to use the instrument, another person
familiar with such instruments must supervise operations.
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Safety Notes
WARNING
Protective gear
This instrument is measured on a live line. To prevent electric shock, use
insulated protective wear such as rubber gloves and rubber boots designed for
electrical work as well as a safety helmet as required by occupational health
and safety regulations.
Notation
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DANGER Indicates an imminently
hazardous situation that will
result in death or serious injury
to the operator.
IMPORTANT
Indicates information related to
the operation of the instrument
or maintenance tasks with
which the operators must be
fully familiar.
WARNING Indicates a potentially hazardous
situation that may result in death
or serious injury to the operator. Indicates prohibited actions.
CAUTION
Indicates a potentially hazardous
situation that may result in
minor or moderate injury to
the operator or damage to the
instrument or malfunction.
Indicates the action which
must be performed.
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Safety Notes
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Indicates cautions and hazards.
When the symbol is printed on the
instrument, refer to a corresponding
topic in the Instruction Manual.
Indicates DC (Direct Current) or AC
(Alternating Current).
Indicates that dangerous voltage may
be present at this terminal. Indicates DC (Direct Current).
Indicates that the instrument may be
connected to or disconnected from a
live conductor. Indicates a grounding terminal.
Indicates a instrument that has been
protected throughout by double
insulation or reinforced insulation.
Indicates the Waste Electrical and
Electronic Equipment Directive (WEEE
Directive) in EU member states.
Indicates that the product incorporates
Bluetooth®wireless technology. Indicates that the product conforms to
regulations set out by the EU Directive.
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Safety Notes
Measurement categories
This instrument conforms to the safety requirements for CAT III 1000 V, CAT IV 600 V
measuring instruments.
T Outlet
Internal wiring
Distribution panel
Service entrance
Service drop
CAT IV
9
Power meter
CAT III
9
Fixed installation
CAT II
9
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