AC/DC CLAMP METER

CM4372

True RMS 600 A AC/DC Clamp Meter
with Bluetooth Wireless Technology
for Advanced Applications and the Toughest Situations

Hioki clamp on meters are best-in-class measuring devices incorporating Hioki’s expertise in current sensing technology. The CM4372 is a 600A True RMS clamp meter that features stronger jaws, broader -25℃ to 65℃ operating temperature range and IP54 dustproof and waterproof enclosure to enable professionals to work quickly in tough situations including the development, repair, and maintenance of equipment and devices such as electric vehicles. Additionally, the high-voltage DC measurement capability of up to 1700 V is ideal for the clamp maintenance inspections of electrical and solar power equipment. Measured values can be sent to a smartphone or tablet using Bluetooth® wireless technology and displayed as waveforms in real time. CAT IV 600 V, CAT III 1000 V Key Features • Send measured values to a smartphone or tablet using Bluetooth® wireless technology • Multiple measurement functions • Automatic AC/DC function helps boost work efficiency • Measure DC voltages of up to 1700 V • Simultaneously measure inrush current in RMS and crest values • Expanded -25 °C to 65 °C operating temperature range • IP54 dustproof and waterproof enclosure *Jaws (current sensor portion): IP50 Data can be downloaded to tablets and smartphones using Hioki’s dedicated apps available from the Google Play or Apple Store.  Search for “HIOKI” and download the “GENNECT Cross” app.



Model No. (Order Code)

CM4372 Built in Bluetooth® wireless technology

*For the latest information about countries and regions where wireless operation is currently supported, please visit the Hioki website. *The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by HIOKI E.E. CORPORATION is under license. *Android, Google Play and the Google Play logo are trademarks of Google Inc. *iOS is a registered trademark of Cisco Technology, Inc. and/or its affiliates in the United States and certain other countries. *iPhone, iPad, iPad mini, iPad Pro and iPod touch are trademarks of Apple Inc. *Apple and the Apple logo are trademarks of Apple Inc. App Store is a service mark of Apple Inc.

Guarantee3years
TrueRMS
Bluetooth
CE

Get it on Google Play

Germany iF Design Award CM4371 series


How to Use Hioki Clamp Meters: Using the Wireless Feature to Display Data on a Mobile Device

Measured values captured by the Hioki CM4372 and CM4374 AC/DC Clamp Meters can be displayed and saved onto a mobile device wirelessly. The results can also be used to create automatic reports. Simply install the free GENNECT Cross app onto your mobile device and connect to the Hioki clamp meters. Reports created on your mobile device can even be e-mailed to the office to further increase work efficiency. Bluetooth wireless technology is available in North America, the EU, Japan and other countries. For an updated list of supported countries, please go to www.hioki.com.


CM4370 Series Clamp Meters Product Video

Key Features • Send measured values to a smartphone or tablet using Bluetooth® wireless technology Search for "HIOKI" and download "GENNECT Cross"! • Multiple measurement functions such as current, voltage, resistance, frequency, and voltage detection • Simultaneously measure inrush current in RMS and crest values • Damage-resistant jaws (current sensor) provide even more years of reliable use. • Expanded -25 °C to 65 °C operating temperature range • IP54 dustproof and waterproof enclosure *Jaws (current sensor portion): IP50 • Automatic AC/DC function helps boost work efficiency • Remain alert to hazards with a red backlight and beeping tone • Measure DC voltages of up to 1700 V


How to Use the Hioki CM4370 Series Clamp Meters
Current Measurement Function:

Learn how to effectively use the current measurement function with this short video.


How to Use the Hioki CM4370 Series Clamp Meters
Auto Hold Function:

The Auto Hold feature is perfect in situations where the display is hard to read because the clamped wires are in hard to reach locations. With Auto Hold, measured results automatically freeze on the display until the next measurement starts, making testing and record taking a snap.


How to Use the Hioki CM4370 Series Clamp Meters
Max/Min/AVG/Peak Function:

Watch this video to learn how to capture the maximum, minimum, average and peak values of a current signal, available when the AUTO AC/DC mode is not in use.


How to Use the Hioki CM4370 Series Clamp Meters
Simultaneous Display of DC Current and DC Voltage:

The CM4370 Series can measure both DC current and DC voltage with a single device at the same time, making it ideal for automotive battery testing and inspection and maintenance of solar panels.


How to Use the Hioki CM4370 Series Clamp Meters
Inrush Measurement Function:

Accurately measure the startup or inrush current of motors and equipment. The CM4370 series is engineered to detect the full startup current period and then identify the RMS waveform as well as the highest waveform peak.


How to Use the Hioki CM4370 Series Clamp Meters
Voltage Measurement Function:

The DMM function of the AC/DC clamp meter is advanced enough to measure up to 1700V AC/DC. Watch this video to learn more.


How to Use the Hioki CM4370 Series Clamp Meters
Continuity Check Function:

The DMM function of the AC/DC clamp meter also provides a continuity check function. Easily detect short-circuits with the clear buzzer and red LED.


How to Use the Hioki CM4370 Series Clamp Meters
AC Voltage Detection Function:

The tip of the current sensor of the CM4370 Series can also detect live voltages, eliminating the need for you to use a separate voltage detector. Energized lines are identified with a loud buzzer and red LED on the clamp meter.


Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

DC Current20.00 A/600.0 A, Basic accuracy: ±1.3% rdg. ±0.08 A (20 A range)
AC Current20.00 A/600.0 A (10 Hz to 1 kHz, True RMS), Basic accuracy 45-66 Hz: ±1.3% rdg. ±0.08 A (at 20 A)
Crest factor20.00 A range: 7.5, 600.0A range: 3 or less
DC+AC Current20.00 A/600.0 A (10 Hz to 1 kHz, True RMS), Basic accuracy DC, 45-66 Hz: ±1.3% rdg. ±0.13 A (at 20 A)
DC Voltage600.0 mV to 1500 V, 5 ranges, Basic accuracy: ±0.5% rdg. ±0.5 mV (at 600 mV)
AC Voltage6.000 V to 1000 V, 4 ranges (15 Hz to 1 kHz, True RMS), Basic accuracy: ±0.9% rdg. ±3 dgt.
DC+AC Voltage6.000 V to 1000 V, 4 ranges, Basic accuracy: ±1.0% rdg. ±7 dgt.
Resistance600.0 Ω to 600.0 kΩ, 4 ranges, Basic accuracy: ±0.7% rdg. ±5 dgt.
Electrostatic capacity1.000 μF to 1000 μF, 4 ranges, Basic accuracy: ±1.9% rdg. ±5 dgt.
Frequency9.999 Hz to 999.9 Hz, Basic accuracy: ±0.1% rdg. ±1 dgt.
Temperature (K)-40.0 to 400.0 ˚C, add temperature probe accuracy to basic accuracy of ±0.5% rdg. ±3.0 ˚C
Voltage detectionHi: 40 V to 600 V AC, Lo: 80 V to 600 V AC, 50/60 Hz
Other functionsAutomatic AC/DC detection, Plus/Minus judgement function of DC A, DC V, Max/Min/Average/PEAK MAX/ PEAK MIN value display, Filter function, Display value hold, Auto hold, Back light, Auto-power save, Buzzer sounds, Zero-adjustment
Dustproof, waterproofGrip: IP54 (when measuring an insulated conductor only), Jaw (the current sensor portion of the instrument)/ barrier: IP50 *Risk of electric shock from the conductor being measured increases when wet.
InterfaceBluetooth® 4.0LE (Bluetooth® SMART), Supported devices: iOS 8 or later, Android™ 4.3 or later smartphone/tablet
GENNECT Cross (free downloadable app) : display measured values and waveforms, Simple logging function, Waveform monitor function, Hold save function
Power supplyLR03 Alkaline battery ×2, Continuous use: 24 hr (Backlight OFF, Bluetooth® ON), 45 hr (Backlight OFF, Bluetooth® OFF)
Core jaw diameter69 mm (2.72 in) W× 14 mm (0.55 in) D, φ33 mm (1.30 in)
Dimensions and mass65 mm (2.56 in) W × 215 mm (8.46 in) H × 35 mm (1.38 in) D mm, 340 g (12.0 oz)
AccessoriesTEST LEAD L9207-10, CARRYING CASE C0203, LR03 Alkaline battery ×2, Instruction Manual ×1, Precautions Concerning Use of Equipment that Emits Radio Waves ×1

Countries and regions where wireless operation is currently supported (CM4372, CM4374)Last up date: Nov. 10, 2017

Wireless certificationJapan, United States, Canada, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom, Thailand, Singapore, Korea, Australia, New Zealand, Chile, Serbia, and Mexico
Exempt from the wireless regulationsViet Nam, Hong Kong, Macao, India, Russian Federation, Colombia, Pakistan, Vanuatu, Peru, and Georgia

Log into your myHioki account to access more technical documents and information where available.

Seminar Videos On Demand

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Seminar Schedule

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Catalogs

Catalog: AC/DC CLAMP METER CM4370 series Download PDF  [5MB]
e-BOOK
English
Catalog: GENNECT Cross (free app) Download PDF  [2MB]
e-BOOK
English
Catalog: CLAMP ON HiTESTER Series Download PDF  [3MB] English

User Guides

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Manuals

Instruction Manual English
Ver.03
Instruction Manual Simplified Chinese  Ver.02
Instruction Manual Korean  Ver.01
Instruction Manual English
Spanish  German  French 
Ver.01
Instruction Manual Japanese
English
Ver.05

Outline Drawings


Ver.02
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Drivers, Firmware

GENNECT Cross for Windows  Freeware V1.01 

Others

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Options

Test leads

Options for the L9207-10 (L9207-10 is a bundled accessory)

TEST LEAD L9207-10

90 cm (2.95 ft) length

CONTACT PIN SET L4933

Attaches to the tip of the Test Lead L9207-10/DT4911, L9206, 70V DC/ 33V AC

SMALL ALLIGATOR CLIP SET L4934

Attaches to the tip of the L4932, L9207-10/DT4911, L9206, CAT III 300V, CAT II 600V

Options for Test leads

Options for the L4930, Test Pin Set L4932 is required when using the Small Alligator Clip Set L4934

CONNECTION CABLE SET L4930

1.2 m (3.94 ft) length

EXTENSION CABLE SET L4931

Expands the length of the cable with banana plug, 1.5 m (4.92 ft) length

TEST PIN SET L4932

Attaches to the tip of the banana plug cable, CAT IV 600V, CAT III 1000V

SMALL ALLIGATOR CLIP SET L4934

Attaches to the tip of the L4932, L9207-10/DT4911, L9206, CAT III 300V, CAT II 600V

ALLIGATOR CLIP SET L4935

Attaches to the tip of the banana plug cable, CAT IV 600V, CAT III 1000V

BUS BAR CLIP SET L4936

Attaches to the tip of the banana plug cable, CAT III 600V

MAGNETIC ADAPTER SET L4937

Attaches to the tip of the banana plug cable, CAT III 1000V

TEST PIN SET L4938

Attaches to the tip of the banana plug cable, CAT III 600V

GRABBER CLIP 9243

Attaches to the tip of the banana plug cable, Red/ Black: 1 each, 196 mm (7.72 in) length, CAT III 1000 V

BREAKER PIN SET L4939

Attaches to the tip of the banana plug cable, CAT III 600V

Temperature measurement

THERMOCOUPLES(K) DT4910

K type, tip exposed, 0.3 mm (0.01 in) diameter, 80 cm (2.62 ft) length, -40 to 260 °C (-40 to 500 °F), tolerance ±2.5 °C

Other options

Bundled accessory

CARRYING CASE C0203

Software

*For the CM4372, CM4374 only

GENNECT Cross (free app)

• Streamline tasks that require repeated measurement and recording of values • Available for Android and iOS

Learn more

Gallery

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