Hioki PW3335 Power Meter

Measure AC and DC Standby Power at a High Level of Precision

Nagano, Japan

Hioki is pleased to announce the launch of the Power Meter PW3335.

The need to further reduce power consumption has become a common issue in the development of household appliances, electronics such as audio and video equipment, machine tools, large air conditioners, and other electrical equipment. At the same time, manufacturers are working to reduce the standby power consumption of devices such as household electronic products while they are plugged in but not operating.

Hioki leapfrogged competitors in 1999 when it introduced the Power HiTester 3332, a power meter that quickly established a broad customer base thanks to its ability to measure both power consumption and standby power. Hioki’s new PW3335 is a redesigned upgrade of that pioneering product.

Development Background
IEC 62301, an international standard governing measurement of standby power, was enacted in 2005 and then revised in 2011 to create the second edition that is currently in force. Although it has become common today for companies to measure the standby power of industrial equipment based on this standard, standby power measurement had not yet become a widespread practice when Hioki launched the 3332 with that capability. As the importance of standby power measurement grew over time, so did the instrument’s user base.

The 3332 supported AC standby power measurement since that was the principal component measured at the time of its launch, but today there are also applications in which standby power measurement includes the DC component. Hioki’s development and introduction of the PW3335 was motivated by the company’s desire to accommodate this shift in standby power measurement and its customers’ needs in the area.

Principal Applications
* Measurement of standby power and operating power of household appliances and electronics (audio and video equipment, white goods, air conditioners, etc.)
* Measurement of standby power and operating power of industrial equipment (air conditioners, machine tools, information technology, etc.)

Power Meter PW3335 Features
1. AC and DC power measurement capability and IEC 62301-compliant standby power measurement capability
Whereas the legacy 3332 was limited to AC power measurement, the PW3335 can measure both AC and DC components. Consequently, it can also be used to measure the power consumption of battery-driven devices and devices powered by a DC power supply such as an AC adapter. In addition, the instrument can measure the standby power of devices powered by AC adapters, a capability that is in increasing demand today. The PW3335 complies with IEC 62301, an international standard governing standby power measurement.

2. High-precision, DC/low-frequency power measurement capability
Power meters, which are used to assess energy-saving performance, are generally required to operate at a high degree of precision. Whereas the 3332 offered basic precision of 0.2%, the PW3335 delivers basic precision of 0.15% - an improvement of 0.05%.

Further, while the 3332 offered a measurement frequency band of 1 Hz to 100 kHz, the PW3335 delivers a much wider measurement frequency band of DC and 0.1 Hz to 100 kHz, adding DC and low-frequency measurement to the capabilities inherited from the legacy product.

3. Broad selection of current measurement ranges to allow measurement of systems ranging from minuscule currents to high currents
The PW3335 ships with a broad range of current measurement ranges to provide coverage from 1 mA to 20 A and a current input range from 10 uA to 30 A for direct input and up to 5,000 A (AC) when using a current sensor.

Standby power measurement requires the ability to measure more minuscule currents, and only Hioki products provide current measurement ranges of 1 mA and 2 mA for this parameter.

4. Auto-range integration function: A proprietary Hioki function for ascertaining integrated power for individual ranges
Printers used in offices are a standard example of an industrial device whose standby power and power consumption are measured by manufacturers. Printers are designed so that they can resume operation from sleep mode quickly when called upon to print a document. When a printer does so, the measured current fluctuates to a significant degree. The PW3335’s auto-range function allows the instrument to automatically switch among appropriate measurement ranges to accommodate such fluctuations, and as a result users can ascertain integrated values for power consumption over a series of device operations.

Thanks to another function that is not available on competitors’ products, the instrument lets users ascertain an integrated power value for each range used in auto-range operation. As a result, integrated power values for the printer in sleep mode as well as at the resumption of operation and when printing can be acquired using the optimal measurement range for each.

5. Built-in harmonic analysis
The PW3335 ships standard with a harmonic analysis function. Harmonics are high-frequency components other than the commercial frequency (50 Hz or 60 Hz). These components cause distortion in voltage and current and can lead to device malfunctions as a result. Consequently, there is an extremely high level of need for harmonic analysis functionality in the development of electronic devices and other equipment.

6. GP-IB, LAN, and other interfaces
The PW3335 ships standard with a LAN interface and is available with GP-IB and RS-232C interfaces. Models with D/A output and external sensor input are also available, enabling users to choose the variant that best matches their needs.
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About HIOKI
Established in 1935, HIOKI E.E. CORPORATION (TSE: 6866) has grown to become a world leader in providing consistent delivery of test and measuring instruments through advanced design, manufacturing, and sales and services. By offering over 200 main products characterized by safety and quality while meeting an expansive range of applications, we aim to contribute to the efficiency and value of our customers' work in research and development, production and electrical maintenance. HIOKI products and services are available around the world through our extensive network of subsidiaries and distributors. Information about HIOKI is available at https://hiokiusa.com.