Quickly Check Current, Voltage, Power, and Power Factor
Detect Electricity Theft and Meter Tampering

Hioki clamp meters are best in class handheld current and voltage meters for safely and accurately measuring power lines. The CM3286 clamp on power meter can measure voltage, current, power, power factor, phase angle, reactive power or frequency, as well as detect phase sequence on live lines at any desired point of a single-phase circuit or three-phase circuit.

CAT IV 600 V, CAT III 1000 V

Key Features

  • Display four parameters simultaneously
  • A handheld power meter that measures from 5 W of power and 60 mA of current
    Measure power ranging from 5 W at a low current of 60 mA to 360 kW
  • In addition to current, voltage, and power, measure simple integral power consumption and phase sequence
  • Features and functions deliver fast and efficient testing
  • Harmonic analysis from 1st to 30th order with GENNECT Cross (Wireless Adapter Z3210 is necessary)
  • Easily transfer measurement data to your smartphone or tablet by using our free app GENNECT Cross or to an Excel® file (Wireless Adapter Z3210 is necessary)

Model No. (Order Code)

CM3286-01 Built in Bluetooth(R) wireless technology
Note: *The indicated value for three-phase power is based on the assumption of a balanced condition and sine wave without distortion at 50/60 Hz. Accurate measurement is not possible on an unbalanced or inverter controlled three-phase line. Also, if the phase (zero cross) cannot be detected due to significant waveform distortion, it cannot be measured nor displayed. *The power factor / phase angle are values obtained from the zero cross of the current and voltage. If the phase (zero cross) cannot be detected due to significant waveform distortion, it cannot be measured nor displayed.

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

Good Design Award 2017

Comment from the Good Design Award 2017

"The CM3286/CM3286-01 offers an extensive range of measurement functionality in a compact footprint, most notably the ability to check for electricity theft in emerging nations. The award recognizes how the product has carried on Hioki’s proven clamp meter design while offering the functionality and ease of use that customers have come to expect from such instruments, along with a highly socially significant design that demonstrates an understanding of how workers check for electricity theft in emerging nations and applies the results of observing how such products are used in the field in order to create a more useful instrument. One hopes that the product will serve to eliminate the problem of electricity theft.”

Broad measurement range

Delivering a broad range of measurements at sites from manufacturing plants to households
Accurately measure power from 5 W at a current as low as 60 mA to 360 kW at a maximum of 600 A (single-phase power measurement)

<Measurement line>
Measure power in single-phase to balanced three-phase circuits (with estimated values)
(1-phase/ 2-wire, 1-phase/ 3-wire, balanced 3-phase/ 3-wire, and balanced 3-phase/ 4-wire)

* The instrument generates estimated power values when measuring 3-phase circuits

Easy-to-see display

Related parameters and connection locations shown on the display at once (Main parameter×1, Sub-parameter×3)

Instantly create reports by a free app (GENNECT Cross) *CM3286-01 only

GENNECT Cross, a free app designed specifically for use with Hioki measuring instruments, lets you check and manage measurement results and create reports.
The software provides a range of functionality that helps manage data in the field, including photographing measurement sites, placing measurement results on photographs, and saving hand written memos.

Click here for details about GENNECT Cross

Simple wiring guide

Provides a simple on-screen guide indicating how to connect it to a 3-phase circuit.

Built-in AUTO HOLD function

The clamp meters beep when the measured value stabilizes and then automatically hold the display value.
This is useful when using the instrument in locations where it is difficult to see the display or press the hold button.

Double warnings with sound and light

When the clamp power meter detects excessively over current or voltage input during a continuity check, it alerts you with a red backlight and beeping tone in order to help prevent accidents.

Quickly check for unbalance

CM3286-50 can measure unbalanced power in a 3-phase/ 3-wire circuit by measuring the single-phase power twice and then automatically adding the results.
(The instrument can also measure 3-phase/4-wire circuits in three separate measurements.)

Easily check power supply fluctuations

Since it can display maximum (MAX), minimum (MIN), and average (AVG) values, the CM3286-50 is useful when you need to ascertain the magnitude of fluctuations.
And since it can also measure crest (PEAK) values, you can use it to check fluctuations at the crest value level.

Support for large-diameter, high-current measurement

CM3286-50 can be used with the optional Clamp On Adapter 9290-10 to measure busbars of up to 55 mm in diameter or 80 × 20 mm.
Measure high currents of up to 1000 A AC (or 1500 A for up to 5 min.).

Accurately detect electricity theft

The CM3286-50 is ideal for verifying electricity theft since it can measure both AC power and current.

- Meter tampering: Detect by comparing electric meter readings and measurements
Proper operation of electric meters can be confirmed by comparing meter readings and actual values.

- Direct theft: Detect by measuring current
Electricity theft can be detected by measuring current on the power supply side of the illegal connection.

The instrument's electricity theft detection-and-report function can be used to quickly and easily make measurements and generate graphical reports with GPS geo tags.
Getting telltale evidence of electricity theft involves more than just saving a record of measured values. Time and date, GPS data, measurement photographs, and measured values are captured as a series of photographs are taken and grouped together into a report.

Electricity theft detection-and-report function (CM3286-01 only)

The instrument’s electricity theft detection-and-report function can be used to quickly and easily make measurements and generate reports (CM3286-01 only).

Simply follow the measurement procedure to take measurements and photographs at four locations and the instrument will automatically generate a report, complete with photos.

Since the report is generated automatically in the field based on captured measurement data, it’s impossible for others to alter the data.

Basic specifications

Accuracy guaranteed: 1 year
Measurement line Single-phase, Three-phase (balanced with no distortion)
Measurement items Voltage, Current, Voltage/Current peak, Active/Reactive/Apparent power, Power factor, Phase angle (*1), Frequency, Simple Active Energy Consumption (Single-phase)

[With Z3210 installed (*2)] Voltage/Current harmonics
AC voltage range [Measurement range] 80.0 V to 600.0 V, Single range, Basic accuracy 45-66 Hz: ±0.7% rdg. ±3 dgt. (Frequency characteristics: 45 to 1 kHz, True RMS)
AC current range [Measurement range] 0.060 A to 600.0 A, 3 range, Basic accuracy 45-66 Hz: ±1.3% rdg. ±3 dgt. (Frequency characteristics: 45 to 1 kHz, True RMS)
Power range [Single phase] 0.005 kW to 360.0 kW
Basic accuracy: ±2.0% rdg. ±7 dgt. (50/ 60 Hz, Power factor=1)
[Balanced three-phase 3-wire] 0.020 kW to 623.5 kW
Basic accuracy: ±3.0% rdg. ±10 dgt. (50/ 60 Hz, Power factor=1)
[Balanced three-phase 4-wire] 0.040 kW to 1080 kW
Basic accuracy: ±2.0% rdg. ±3 dgt. (50/ 60 Hz, Power factor=1)
Harmonic levels [With Z3210 installed (*2)] Voltage/Current harmonic levels up to 30th, Content factor, Total harmonic distortion ratio
Other functions [Phase angle (*1)] lead -180.0° to lag 179.9°, [Power factor] -1.000 to 1.000
[Frequency] 45.0 Hz to 999.9 Hz, PEAK, Phase detection, MAX/MIN/AVG value display, Auto hold, electric meter comparison, unbalanced 3-phase power estimate display, etc.
Dustproof and waterproof IP50 (for measurement of current in insulated conductors or storage in completely dry conditions)
Power supply LR03 Alkaline battery ×2
Continuous use: approx. 25 hr (without Z3210 installed), approx. 18 hr. (with Z3210 installed and using wireless communications)
Other conditions: 100 A AC measurement, backlight off, 23°C reference value
Core jaw dia. φ 46 mm (1.81 in), Jaw dimensions: 92 mm (3.62 in) W x 18 mm (0.71 in) D mm
Dimensions and mass 65 mm (2.56in) W × 241 mm (9.49in) H × 35 mm (1.38in) D, 450 g (15.9 oz)
Included accessories Connection Cord L9257 ×1, LR03 Alkaline battery ×2, Carrying Case C0203 ×1, Instruction Manual ×2, Operating Precautions ×1
  • *1:Phase angle obtained from zero cross of current and voltage.
  • *2:Harmonics can be displayed with our free app GENNECT Cross.

Countries and regions where wireless operation is currently supported (CM3286-01)

Last update: November 2022
Countries and regions where wireless operation is currently supported Austria, Bangladesh, Belgium, Bulgaria, Canada, Chile, Colombia, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Georgia, Germany, Greece, Hong Kong, Hungary, Iceland, India, Indonesia, Ireland, Israel, Italy, Japan, Kenya, Korea, Latvia, Liechtenstein, Lithuania, Luxembourg, Macao, Malta, Myanmar, Netherlands, Norway, Peru, Philippines, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Thailand, Turkey, United Kingdom, United States, Vietnam
Note Use of devices that emit radio radiation requires approval in the country of use. Thus, use of the instrument in a country or region where they have not been approved may be subject to penalty as a violation of law.

Test leads (2)

Options for Test leads (for the L4930) (11)

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

Carrying case (2)

C0203 is an included accessory