CLAMP ON PROBE 3276

High S/N characteristics enable the measurement of 10 mA order current waveforms
Wideband Current Probe for Oscilloscopes

Hioki wide frequency current probes are best-in-class current sensors for use with Memory HiCorders and high performance oscilloscopes. The 3276 offers a wide DC to 100 MHz bandwidth and 30A of continuous input, and applications include capturing transient current signals from switching power supplies, inverters, and motor controllers.
The probe is designed with a high permeability magnetic shield with low insertion loss to reduce derating that may result from increased sensor head heating caused by eddy currents, making it ideal for measuring current of low impedance circuits and waveforms that include high frequency components.

Use with an instrument with a high input impedance of 1 MΩ or higher.

Key Features

  • Waveform observation across a wide band from DC to MHz
  • Connects directly to oscilloscope or Memory HiCorder BNC input terminal (*1)
  • High S/N characteristics enable the measurement of 10 mA order current waveforms
  • *1:Connecting the probe's metal BNC terminal to a Memory HiCorder’s plastic BNC terminal may distort or damage the plastic terminal. To avoid damage, please connect and disconnect the probe cable straight to the BNC terminal of the waveform monitoring equipment.

Model No. (Order Code)

3276 DC to 100 MHz, 30 Arms
Note: Use the Power Supply 3269/3272 for general measurements or when power is not available from the Memory Hicorder. When performing continuous measurements, be aware of offset voltage drift.

Wide Frequency Band

Current transformer (CT) operation is characterized by a frequency band that extends to a 100 MHz, allowing observation of current waveforms that include a broad range of frequency components.

Basic specifications

Accuracy guaranteed: 1 year, Accuracy guarantee period after adjustment made by Hioki: 6 months
Frequency bandwidth DC to 100 MHz (-3 dB)
Rise time 3.5 ns or shorter
Noise level 2.5 mA rms max. (bandwidth limited to 20 MHz)
Continuous allowable input 30 A rms (requires derating at frequency)
Max. allowable peak input 50 A peak (non continuous)
Amplitude accuracy
(30 min. after power-on, after degaussing and zero-adjustment)
±1.0 % rdg. ±1 mV f.s. (DC, 45 to 66 Hz, 0 to 30 A rms)
±2 % rdg. (DC, 45 to 66 Hz, 30 A rms to 50 A peak)
Output rate 0.1 V/A (The output of this probe is internally terminated)
Measurable conductors Insulated conductor
Core diameter φ 5 mm (0.20 in)
Power supply ±12 V ±0.5 V, 5.3 VA max.
Dimensions and mass 175 mm (6.89 in)W × 18 mm (0.71 in)H × 40 mm (1.57 in)D, 240 g (8.5 oz)
Sensor cable BNC terminal: 1.5 m (4.92 ft), Power cable: 1 m (3.28 ft)
Accessories Instruction manual ×1, Carrying case × 1

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