AC/DC CLAMP METER CM4373

True RMS 2000 A AC/DC Clamp Meter for the Toughest Situations

Hioki clamp meters are best-in-class measuring devices incorporating Hioki’s expertise in current sensing technology. The CM4373 is a 2000A True RMS clamp meter that features stronger jaws, broader -25°C to 65°C 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.

CAT IV 600 V, CAT III 1000 V

CM4370 Series Clamp Meters Product Video

Key Features

  • Multiple measurement functions
  • Automatic AC/DC function helps boost work efficiency
  • Measure DC voltages of up to 1700 V (*1) for open voltage inspections of solar panels
  • 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
  • *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.
  • e.g.: When measuring the no-load voltage of an ungrounded PV panel
  • Do not use the instrument with circuits whose terminal-to-ground voltage exceeds 1000V. Doing so may result in electric shock.

Model No. (Order Code)

CM4373

Germany iF Design Award CM4371 series

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

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

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

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.

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

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.

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

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.

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

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.

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

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.

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

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.

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

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: 1 year, Accuracy guarantee period after adjustment made by Hioki: 1 year
DC Current range 600.0 A/2000 A, Basic accuracy: ±1.3% rdg. ±0.3 A (600 A range)
AC Current range 600.0 A/2000 A (10 Hz to 1 kHz, True RMS), Basic accuracy: ±1.3% rdg. ±0.3 A (at 600 A)
Crest factor 600.0 A range: 3 or less,
2000 A range: 2.84 or less
DC+AC Current range 600.0 A/2000 A (10 Hz to 1 kHz, True RMS), Basic accuracy DC, 45-66 Hz: ±1.3% rdg. ±1.3 A (at 600 A)
DC Voltage range 600.0 mV to 1500 V (*1), 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 45 - 66 Hz: ±0.9% rdg. ±0.013 V (at 6 V)
DC+AC Voltage range 6.000 V to 1000 V, 4 ranges, Basic accuracy DC, 45 - 66 Hz: ±1.0% rdg. ±0.023 V (at 6 V)
Resistance range 600.0 Ω to 600.0 kΩ, 4 ranges, Basic accuracy: ±0.7% rdg. ±0.5 Ω (at 600 Ω)
Capacitance range 1.000 μF to 1000 μF, 4 ranges, Basic accuracy: ±1.9% rdg. ±0.005 μF (at 1 μF)
Frequency range 9.999 Hz to 999.9 Hz, 3 ranges, Basic accuracy: ±0.1% rdg. ±0.003 Hz (at 9.999 Hz)
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.
Power supply LR03 Alkaline battery ×2, Continuous use 45 hr (Backlight OFF)
Core jaw diameter φ55 mm (2.17 in), Jaw dimension: 92 mm (3.62 in) W×18 mm (0.71 in) D
Dimensions and mass 65 mm (2.56 in) W×250 mm (9.84 in) H×35 mm (1.38 in) D mm, 530 g (18.7 oz)
Accessories TEST LEAD L9207-10, CARRYING CASE C0203, LR03 Alkaline battery ×2, Instruction Manual×1
  • *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.
  • e.g.: When measuring the no-load voltage of an ungrounded PV panel
  • Do not use the instrument with circuits whose terminal-to-ground voltage exceeds 1000V. Doing so may result in electric shock.

Test leads (2)

L9207-10 is a bundled accessory

Options for Test leads (for the L9207-10) (2)

Options for Test leads (for the L4930) (10)

Test Pin Set L4932 is required when using the Small Alligator Clip Set L4934

Temperature measurement (1)

Other options (1)

Bundled accessory


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