POWER METER PW3335

Measure AC/DC Standby Power Up to Large Power Loads

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 PW3335 delivers high measurement accuracy and handles currents with higher crest values in lower current ranges (i.e., high crest factors) while minimizing the effects of power factor to greatly help reduce power measurement uncertainty, especially critical when the measured standby power is at μA levels.

Key Features

  • Compatible with the SPECpower® (*1) benchmark for server power consumption
  • High-precision ±0.1% basic accuracy (*2)
  • Wide 1mA to 20A measurement range, max. continuous input of 30 A
  • Wide frequency bandwidth of 0.1 Hz to 100 kHz or DC
  • Measure harmonic and standby power consumption according to IEC62301
  • Achieve superior accuracy even with a low power factor for no-load testing of transformers and motors
  • Synchronized control using up to 8 instruments
  • Built-in external sensor input terminals to measure up to 5000 A AC (PW3335-03, PW3335-04 only)
  • Send measured values to Hioki data loggers using a Bluetooth® wireless technology compatible adapter (*3)
  • *1:SPECpower® is a registered trademark of Standard Performance Evaluation Corporation.
  • *2:For complete details, please refer to the specifications.
  • *3:LR8410 Link-compatible products, Ver. 1.1 and later. The PW3335-01 is not supported.

Model No. (Order Code)

PW3335 Buit-in LAN, RS-232C
PW3335-01 Buit-in LAN, GP-IB
PW3335-02 Buit-in LAN, RS-232C, D/A output
PW3335-03 Buit-in LAN, RS-232C, external sensor terminal
PW3335-04 Buit-in LAN, RS-232C, GP-IB, D/A output, external sensor terminal

Greater accuracy for standby power

The PW3335 Power Meter delivers a range configuration that lets you measure extremely low power levels with a margin to spare. Accuracy can be set from 10 μA and up for current, and 0 W and up for effective power. Perfect for measurements according to IEC62301 and other standards.

Support for CF6 (Crest Factor 6)

When an AC adapter or switching power supply operates with no load, the crest factor of the current waveform increases. The PW3335 can measure waveforms that exceed the range of watt meters that support crest factor 3.
In addition, although the power factor is low during no-load operation, the PW3335 is affected very little by power factor and can therefore achieve accurate measurements.

Power Factor Effect of 0.1% or Less, Even at Low Power Factors

A no-load loss test is one indicator for evaluating energy conservation for transformers and motors.
The PW3335 are affected very little by power factor, at ±0.1% f.s. or less, allowing active power to be measured with a high level of accuracy at low power factors.

Basic specifications

Accuracy guaranteed: 1 year, Accuracy guarantee period after adjustment made by Hioki: 6 months
Measurement lines Single-phase/ two-wires
Measurement items Voltage, current, active power, apparent power, reactive power, power factor, phase angle, frequency, maximum current ratio, current integration, active power integration, integration time, voltage waveform peak value, current waveform peak value, voltage crest factor, current crest factor, time average current, time average active power, voltage ripple rate, current ripple rate
Harmonic parameters Synchronization frequency range : 10 Hz to 640 Hz
Maximum analysis order : 50th
Harmonic voltage RMS value, harmonic current RMS value, harmonic active power, total harmonic voltage distortion, total harmonic current distortion, fundamental wave voltage, fundamental wave current, fundamental wave active power, fundamental wave apparent power, fundamental wave reactive power, fundamental wave power factor (displacement power factor), fundamental wave voltage current phase difference, harmonic voltage content percentage, harmonic current content percentage, harmonic active power content percentage
(The following parameters can be downloaded as data with only PC communications : Harmonic voltage phase angle, harmonic current phase angle, harmonic voltage current phase difference)
Measurement ranges [Voltage] AC/DC 6 V to 1000 V, 8 ranges
[Current] AC/DC 1 mA to 20 A, 14 ranges
[Power] 6.0000 mW to 20.000 kW (Depends on combination of voltage and current range)
Effect of power factor : ±0.1% f.s. or less (45 to 66 Hz, at power factor = 0)
Integration measurement
(Integration time up to 10,000 hours)
Switchable between fixed-range integration and auto-range integration.
[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 input terminal] 2 MΩ
[Current input terminal] 520 mΩ or less (at 1 mA to 100 mA range), 15 mΩ or less (at 200 mA to 20 A range)
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 (depend on average times settings)
Frequency characteristics DC, 0.1 Hz to 100 kHz
D/A output
(-02/-04 models only)
7 channels (selectable from the following items): level output DC ±2 V f.s. or 5 V f.s., 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 level output (voltage, current, active power)
Functions [Rectification method] AC+DC, AC+DC Umn, AC, DC, FND, Auto-range, Average, VT or CT ratio settings, Synchronized control, MAX/MIN, and more
Logger connectivity Sends measured values wirelessly to logger by using a Bluetooth® wireless technology serial conversion adapter. (Supported devices: Hioki LR8410 Link-compatible loggers), Ver. 1.1 and later, the PW3335-01 is not supported
Interfaces LAN (all models), RS-232C (except -01 model, for communication/LR8410 link), GP-IB (-01, -04 models only)
Power supply 100 V to 240 V AC, 50/60 Hz, 30 VA max.
Dimensions and mass 210 mm (8.27 in)W × 100 mm (3.94 in)H × 245 mm (9.65 in)D, 3 kg (105.8oz)
Accessories Instruction manual ×1, power cord ×1, voltage and current input terminal safety cover ×2, safety cover installation screws (M3 × 6 mm) ×4

Up to 200 A (High precision) (5)

*Current sensors are compatible only with versions of Model PW3335 that include the external current sensor terminal.

*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)

*Current sensors are compatible only with versions of Model PW3335 that include the external current sensor terminal.

*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)

*Current sensors are compatible only with versions of Model PW3335 that include the external current sensor terminal.

*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 communication (3)

Other options (1)

Synchronized control with the 9165