Product Mar. 14, 2019

HIOKI Launches Power Quality Analyzer PQ3198

Revamped Functionality and Specs Simplify Recording and Analysis of Power Supply Issues

New instrument eliminates the need for a dedicated sensor power supply while enabling power and efficiency measurement of two circuits

March 14, 2019 - Nagano, Japan

HIOKI is pleased to announce the launch of the Power Quality Analyzer PQ3198, a new instrument that revamps the functionality and specifications of its predecessor, the Power Quality Analyzer PW3198. The product makes it even easier to record and analyze power supply issues, including by eliminating the need for a dedicated sensor power supply and by enabling power and efficiency measurement of two circuits.

■ Development Background
As power circuits become more complex with increasing use of power electronics devices, large equipment, and geographically dispersed power supplies, power supply issues in the form of electronic device malfunctions and failures are becoming more common.

Power quality analyzers are measuring instruments that record and analyze power supply quality in order to investigate the causes of those and similar issues in the field. Since launching the Power Quality Analyzer 3196 in 2001, HIOKI has developed a series of increasingly sophisticated products for the product line to accommodate customer needs while helping them resolve numerous power supply issues around the world.
HIOKI’s line of power quality analyzers currently consists of the mid-range PQ3100, launched in October 2016, and the flagship PW3198, launched in April 2011. Those instruments are paired with voltage cords and current sensors that measure voltage and current, respectively, and some of the latter require a separate, dedicated power supply. After HIOKI added functionality for powering current sensors to the PQ3100, there was increasing demand from customers to do the same for the flagship PW3198, which led HIOKI to redesign the model.

■ Principal New Functionality
1. Ability to supply power to sensors, eliminating the need for a dedicated power supply
The PQ3198 can supply power to AC flexible sensors*1 and AC/DC sensors*2, eliminating the need to provide a separate, dedicated power supply for those devices as they have required in the past. In addition to making it possible to use the instrument in outdoor locations where power is not readily available, this capability makes it easier to work in confined locations by reducing the number of wires needed to make measurements.

2. Ability to measure power and efficiency on two circuits
The PQ3198 can simultaneously measure power and efficiency on two circuits, for example in the primary (input) side and secondary (output) side of an EV rapid charger’s AC/DC converter or a solar power system.
The instrument can also measure DC to AC inverters with a fundamental frequency of 40 to 70 Hz and a carrier frequency*3 of 20 kHz or less.

3. Remote measurement using FTP server functionality
The PQ3198 provides an FTP server function, making it easy to acquire data from the instrument remotely.

4. Extended recording without the need to worry about the number of events (power anomalies)
Whereas the previous model (the PW3198) was able to record a maximum of 1000 events, the PQ3198 boosts that number to 9999. Further, it can record continuously for up to 366 days based on repeat recording settings.

5. Standard support for analysis with PQ ONE analytical software
The PQ3198 ships with PQ ONE, a popular analytical software package that also comes with the Power Quality Analyzer PQ3100. Functionality includes display of event statistics (to display events by date or time of day), EN50160 judgment (for evaluation, analysis, and judgment capability that complies with the EN50160 standard), and report generation.

■ Principal Markets
Management of power quality and analysis of power supply issues by power companies, electricians, electrical maintenance engineers, building maintenance companies, electrical safety associations, and equipment end-users

*1 AC flexible sensor: A loop-shaped AC sensor that can be bent freely. Used to measure wires with a large diameter and large currents. In the context of the PQ3198, “AC flexible sensors” refers to the AC Flexible Current Sensor CT7044/CT7045/CT7046.
*2: AC/DC sensor: A sensor that can measure either alternating or direct current. In the context of the PQ3198, “AC/DC sensors” refers to the AC/DC Auto Zero Current Sensor CT7731/CT7736/CT7742.
*3: Carrier frequency: The frequency that determines the timing at which the power semiconductors in an inverter circuit switch on and off.


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

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