POWER METER PW3337

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

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.

Product Video

Key Features

  • Compatible with the SPECpower® (*1) benchmark for server power consumption
  • 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 % (*2)
  • 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
  • Create a 6-channel power meter by synchronizing two PW3337 units and using the free PC application
  • *1:SPECpower® is a registered trademark of Standard Performance Evaluation Corporation.
  • *2:For complete details, please refer to the specifications.

Model No. (Order Code)

PW3337 3ch
PW3337-01 3ch, built-in GP-IB
PW3337-02 3ch, built-in D/A output
PW3337-03 3ch, built-in GP-IB, D/A output

Basic specifications

Accuracy guaranteed: 1 year, Accuracy guarantee period after adjustment made by Hioki: 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
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)
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
Functions [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
Interfaces 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)
Accessories Instruction manual × 1, Measurement guide × 1, Power cord × 1

Up to 200 A (High precision) (5)

*To use a high precision current sensor (-05 model), requires Sensor Unit CT9555 and Connection Cord L9217.

*To use a high precision current sensor (without “-05” model), requires Conversion Cable CT9900 for PL23 (10 pin) to ME15W (12 pin) conversion, Sensor Unit CT9555 and Connection Cord L9217.
*1 sensor necessary for single-phase measurement, 2 or 3 sensors required for 3-phase measurements. The same number of power supply and connection cord as the sensor is necessary.

Up to 500 A (High precision) (4)

*To use a high precision current sensor (-05 model), requires Sensor Unit CT9555 and Connection Cord L9217.

*To use a high precision current sensor (without “-05” model), requires Conversion Cable CT9900 for PL23 (10 pin) to ME15W (12 pin) conversion, Sensor Unit CT9555 and Connection Cord L9217.
*1 sensor necessary for single-phase measurement, 2 or 3 sensors required for 3-phase measurements. The same number of power supply and connection cord as the sensor is necessary.

Up to 1000 A (High precision) (2)

*To use a high precision current sensor (-05 model), requires Sensor Unit CT9555 and Connection Cord L9217.

*To use a high precision current sensor (without “-05” model), requires Conversion Cable CT9900 for PL23 (10 pin) to ME15W (12 pin) conversion, Sensor Unit CT9555 and Connection Cord L9217.
*1 sensor necessary for single-phase measurement, 2 or 3 sensors required for 3-phase measurements. The same number of power supply and connection cord as the sensor is necessary.

PL23 (10 pin) - ME15W (12 pin) conversion (1)

*When using a PL23 terminal sensor without “-05” in the model number, Conversion Cable CT9900 must be used to connect to ME15W terminal.

*When using the CT6865 and CT6846 (without “-05”), connection via the CT9900 and manual settings are required on the main device.

Power supply for sensors (2)

PC communications (3)

Other options (1)

Synchronize multiple units