HIOKI CM4371-50 AC/DC Clamp Meter
True RMS 600 A AC/DC Clamp Meter for the Toughest Situations
With DMM Functions that Deliver Top Safety

OVERVIEW

CM4371-50 Product Introduction | 600 A AC/DC Clamp Meter
Check out this 3-minute product introduction video for CM4371-50, CM4373-50

Key Features

*1:When using the optional DC High Voltage Probe P2000. The clamp meter itself is capable of measuring up to 1000 V DC.
*2:Wireless Adapter Z3210 is necessary.

Model No. (Order Code)

CM4371-50

AC/DC Clamp Meter, Wireless Adapter Z3210 not included

Data can be downloaded to tablets and smartphones using Hioki’s dedicated free app "GENNECT Cross," available from the Google Play or App Store.
 

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FEATURES

Safe inspection of solar installations with high voltage

DC High V Probe Mode

- Enables high voltage measurement up to CAT III 2000 V
- Safely measure solar installations like the mega-solar without interrupting the grid by simply connecting the DC High Voltage Probe P2000 to compatible Hioki clamp meters and digital multimeters (DMMs)

See details about DC High Voltage Probe P2000



Wireless communication capability for even greater convenience

Wireless support
When the Wireless Adapter Z3210 is installed, Bluetooth® wireless communication is enabled. It transfers measurements to your smartphone or tablet and allows you to quickly create reports with field photos and drawings.

See details about Wireless Adapter Z3210
 

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Excel® Direct Input Function (*1)
Boost work efficiency in the field by letting you directly transfer measurement data to (i.e., enter measured values directly into) templates created as Excel®.

*1:The optional Wireless Adapter Z3210 is required.

Helping personnel analyze issues in the field

Harmonic measurement
When combined with GENNECT Cross (*2), you can perform simple harmonic analysis. Applications include problem analysis of power supply systems.

See here for details about GENNECT Cross

Problems that can be caused by harmonics

• Equipment burn-out and destruction due to overheating
• Malfunctions of power control devices
• Increased loss along with reduced service life and efficiency for power devices

*2:GENNECT Cross is an free app that lets you connect field measuring instruments to smartphones and tablets using Bluetooth® communications. Wireless Adapter Z3210 (sold separately) is required in order to pair the instrument with GENNECT Cross.

Convenient for repeated measurement and recording tasks!

Automatic hold function
In addition to being convenient when the display cannot be seen during measurement, when the measurement value is stabilized, the display value is automatically held until the next measurement, which is very convenient for repeated measurement and recording tasks.



Assess transient currents at motor startup

The clamp meters can simultaneously measure inrush current in RMS as well as maximum crest values at motor startup and for welding currents.
The clamp meters automatically detect the duration of the inrush current (which can range from several dozen milliseconds to several hundred milliseconds) and measure the current during that interval, enabling them to yield more accurate
measurements than standard clamp-on meters whose measurement interval is fixed to 100 ms.



More recommended features

Stop worrying about losing test lead caps
Test Lead L9300 incorporate integrated caps for greater convenience and safety. The design lets you change the measurement category simply by sliding the test lead’s protective finger guard. You no longer have to worry about losing caps!
 

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SPECIFICATIONS

Basic specifications
Accuracy guaranteed: 1 year
 

DC Current range	20.00 A/600.0 A, Basic accuracy: ±1.3% rdg. ±0.08 A (20 A range)
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: 7.5 600.0 A 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 1000 V (When using P2000: 600.0 V to 2000 V)
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. ±0.003 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. ±0.013 V (at 6 V)
Resistance range	600.0 Ω to 6.000 MΩ, 5 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
Harmonic levels	[With Z3210 installed] Voltage/Current harmonic levels up to 30th, Content factor, Total harmonic distortion ratio *Harmonics can be displayed with our free app GENNECT Cross.
Other functions	DC power, Continuity check, Diode check, Automatic AC/DC detection, Pass/fail judgement function of DC A and DC V, Max/Min/Average/PEAK MAX/ PEAK MIN value display, Low-pass filter function, Display value hold, Auto hold, Back light, Auto-power save, Buzzer sounds, Zero-adjustment
Dustproof, waterproof	IP54 (While in storage, or when measuring the current an insulated conductor. Do not use when wet.)
Power supply	LR03 Alkaline battery ×2 Continuous use: 40 hr (without Z3210 installed), 20 hr. (with Z3210 installed and using wireless communications) Other conditions: 10 A AC measurement, backlight off, 23°C reference value
Core jaw diameter	φ33 mm (1.30 in), Jaw dimension: 69 mm (2.72 in) W× 14 mm (0.55 in) D
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)
Included accessories	Test Lead L9300, Carrying Case C0203, LR03 Alkaline battery ×2, Instruction Manual×2, Operating Precautions ×1