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3-Channel AC/DC Power Meter for Single-Phase to 3P4W Equipment such as Motors, Inverters, Power Conditioners, and Power Supplies.

SKU: PW3337 Categories: ,


Hioki benchtop power meters and power analyzers are best in class power measuring instruments for measuring single to three-phase lines with a high degree of precision and accuracy. The PW3337 series measure power on the full range of electrical equipment, from single-phase devices such as battery-driven devices and household electronics to industrial use and three-phase electrical equipment over 3 input channels. The power meters provide coverage from DC to inverter frequencies with support for voltages up to 1000 V and direct-input currents of up to 65 A, and can also measure currents of up to 5000 A using an optional current sensor. POWER METER PW3337

Model No. (Order Code)



3ch model




3ch, GP-IB installed model




3ch, D/A output installed model





3ch, GP-IB, D/A output installed model

Product Video

• Compatible with the SPECpower® benchmark for server power consumption SPECpower® is a registered trademark of Standard Performance Evaluation Corporation

• Measure DC, and single-phase 2-wire to 3-phase 4-wire with 3-channel input

• For development and production of motors, inverters, power conditioners, power supplies, and other devices

• High-precision basic accuracy of ±0.1 % (*1) (*1) For complete details, please refer to the specifications

• Wide frequency bandwidth of 0.1 Hz to 100 kHz or DC

• High-current measurement up to 65 A of direct input

• Harmonic measurement up to the 50th order according to IEC 61000-4-7

• High-accuracy measurement, even with a low power factor for no-load testing of transformers and motors

• Built-in external sensor input terminals to measure up to 5000 A AC

• Synchronize up to 8 units for multi-unit measurement

■ Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 6 months)


Measurement lines


Single-phase 2-wires, single-phase 3-wires, 3-phase 3-wires, 3-phase 4-wires (voltage / current measurement range set for each wiring mode)


Measurement items


Voltage, Current, Active power, Apparent power, Reactive power, Power factor, Phase angle, Frequency, Efficiency, Current integration, Active power integration, Integrated time, Voltage waveform peak value, Current waveform peak value, Voltage crest factor, Current crest factor, Time average current, Time average active power, Voltage ripple factor, Current ripple factor POWER METER PW3337


Harmonic parameters


Synchronization frequency range: 10 Hz to 640 Hz, Analysis order up to 50th
Harmonic voltage RMS value, Harmonic current RMS value, Harmonic active power, Total harmonic voltage distortion, Total harmonic current distortion, Voltage fundamental waveform, Current fundamental waveform, Active power fundamental waveform, Apparent power fundamental waveform, Reactive power fundamental waveform, Power factor fundamental waveform (displacement power factor), Voltage current phase difference fundamental waveform, Interchannel voltage fundamental wave phase difference, Interchannel current fundamental wave phase difference, Harmonic voltage content % , Harmonic current content % , Harmonic active power content %
(The following parameters can be downloaded as data during PC communication but not displayed: Harmonic voltage phase angle, Harmonic current phase angle, Harmonic voltage current phase difference) POWER METER PW3337


Measurement range


Voltage range: AC/DC 15 V to 1000 V, 7 ranges
Current range: AC/DC 200 mA to 50 A, 8 ranges
Power range: 3.0000 W to 150.00 kW (Depends on combination of voltage and current range)


Integration measurement (Integration time up to 10,000 hours)


[Current] No.of displayed digits: 6 digits (from 0.00000 mAh, Polarity-independent integration and Sum value)
[Active power] No.of displayed digits: 6 digits (from 0.00000 mWh, Polarity-independent integration and Sum value)


Input resistance (50/60 Hz)


[Voltage] 2 MΩ, [Current] 1 mΩ or less (direct input)


Basic accuracy (Active power)


±0.1% rdg. ±0.1% f.s. (DC)
±0.1% rdg. ±0.05% f.s. (45 Hz to 66 Hz, at Input < 50% f.s.)
±0.15% rdg. (45 Hz to 66 Hz, at 50% f.s. ≤ Input)


Display refresh rate


5 times/s to 20 seconds (depends on average times settings)


Frequency characteristics


DC, 0.1 Hz to 100 kHz


D/A output (-02/-03 model only)


16 channels (selectable from following items), Level output DC ±2 V, Waveform output 1 V f.s.
Level output, instantaneous waveform output (voltage, current, active power)
Level output (apparent power, reactive power, power factor, or other)
High-speed active power level output




[Rectification method] AC+DC, AC+DC Umn, AC, DC, FND, Auto-range, Average, VT or CT ratio settings, Synchronized control, MAX/MIN, or other functions




RS-232C / LAN standard, (-01/-03 model also includes GP-IB)


Power supply


100 to 240 V AC, 50/60 Hz, 40 VA max.


Dimensions and mass


305 mm (12.01 in) W × 132 mm (5.20 in) H × 256 mm (10.08 in) D, 5.6 kg (197.5 oz)




Instruction manual × 1, Measurement guide × 1, Power cord × 1


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