Hioki PW3337

The Hioki PW3337 Power Analyzer measures 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.

Measurement accuracy that remains unchanged for high-current measurement

Accuracy is guaranteed for currents of up to 65 A with direct input. The PW3337 can also measure high currents in excess of 65 A with optional current sensors. Direct-input power meters typically exhibit degraded accuracy when inputting high currents due to shunt resistor self-heating. However, the PW3337 reduces input resistance with a DCCT design that virtually eliminates this type of accuracy degradation.

Simultaneous processing of power data and all harmonic data

All data, including RMS values, mean values, DC components, AC components, fundamental wave components, harmonic measurement, and integration measurement, is processed in parallel internally. There is no need to switch modes depending on whether you wish to acquire power data or harmonic data - simply switch the display to obtain measured values with true simultaneity. Additionally, PC communications software can be used to capture measurement data, including from multiple synchronized instruments.

Wide frequency band of DC and 0.1 Hz to 100 kHz

Thanks to a wide-band capability extending from DC and 0.1 Hz to 100 kHz, the PW3337 can cover not only inverters' fundamental frequency band, but also the carrier frequency band.

Integrating fluctuating power values

The power consumption of equipment subject to a fluctuating load, for example refrigerators, heaters, and pumps, varies considerably between rated operation and no-load operation. Thanks to its broad dynamic range, the PW3337 can perform integrated power measurement with guaranteed accuracy using a single range, even if the power fluctuates dramatically during integration. Measurements can accommodate waveform peaks of up to 600% of the range rating.

The PW3337 Communicator connects with the power meters via the LAN or RS-232C interface, and is available for free download. Functionality includes configuring instruments, capturing interval data, performing numerical calculations based on measurement data, calculating efficiency values across multiple units, displaying 10 or more measurement parameters, and displaying waveforms.