AC/DC CLAMP METER
CM4372
with Bluetooth Wireless Technology
for Advanced Applications and the Toughest Situations
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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 (*1) 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 Key Features **1 Your instrument can be used to measure voltages in excess of 1000 V DC if and only if both of the following conditions are satisfied: 1. The circuit under measurement is isolated from the commercial power grid. 2. The circuit under measurement is isolated from ground. 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)
*For the latest information about countries and regions where wireless operation is currently supported, please visit the Hioki website.       |
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Germany iF Design Award CM4371 series
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How to Use Hioki Clamp Meters: Using the Wireless Feature to Display Data on a Mobile Device TMeasured 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. |
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CM4370 Series Clamp Meters Product Video Key Features |
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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. |
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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. |
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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. |
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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. |
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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. |
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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. |
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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. |
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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 Current range | 20.00 A/600.0 A, Basic accuracy: ±1.3% rdg. ±0.08 A (20 A range) |
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| AC Current range | 20.00 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 factor | 20.00 A range: 7.5, 600.0A range: 3 or less |
| DC+AC Current range | 20.00 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 Voltage range | 600.0 mV to 1500 V, 5 ranges, Basic accuracy: ±0.5% rdg. ±0.5 mV (at 600 mV) |
| AC Voltage range | 6.000 V to 1000 V, 4 ranges (15 Hz to 1 kHz, True RMS), Basic accuracy: ±0.9% rdg. ±3 dgt. |
| DC+AC Voltage range | 6.000 V to 1000 V, 4 ranges, Basic accuracy: ±1.0% rdg. ±7 dgt. |
| Resistance range | 600.0 Ω to 600.0 kΩ, 4 ranges, Basic accuracy: ±0.7% rdg. ±5 dgt. |
| Capacitance range | 1.000 μF to 1000 μF, 4 ranges, Basic accuracy: ±1.9% rdg. ±5 dgt. |
| Frequency range | 9.999 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 detection | Hi: 40 V to 600 V AC, Lo: 80 V to 600 V AC, 50/60 Hz |
| Other functions | Automatic 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, waterproof | Grip: 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. |
| Interface | Bluetooth® 4.0LE, Supported devices: iOS, Android™ smartphone/tablet GENNECT Cross (free downloadable app) : display measured values and waveforms, Simple logging function, Waveform monitor function, Hold save function |
| Power supply | LR03 Alkaline battery ×2, Continuous use: 24 hr (Backlight OFF, Bluetooth® ON), 45 hr (Backlight OFF, Bluetooth® OFF) |
| Core jaw diameter | 69 mm (2.72 in) W× 14 mm (0.55 in) D, φ33 mm (1.30 in) |
| Dimensions and mass | 65 mm (2.56 in) W × 215 mm (8.46 in) H × 35 mm (1.38 in) D mm, 340 g (12.0 oz) |
| Accessories | TEST 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)
| Wireless certification | Japan, 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, China, Korea, Philippines, Australia, New Zealand, Chile, Serbia, Mexico, and Saudi Arabia |
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| Exempt from the wireless regulations | Viet Nam, Hong Kong, Macao, India, Russian Federation, Colombia, Pakistan, Peru, and Georgia |
| Catalog: GENNECT CROSS SF4071, SF4072 | Download PDF [2MB] | English |
| Catalog: CLAMP ON HiTESTER Series | Download PDF [3MB] | English |
| Catalog: AC/DC CLAMP METER AC CLAMP METER CM4000 series | Download PDF [6MB] | English |
| Catalog: AC/DC CLAMP METER series | Download PDF [6MB] | English |
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