Hioki 3280-10F AC Clamp Meter

Hioki CT6280 AC Flexible Current Sensor

Instruments Deliver Improved Convenience with Available Flexible Current Sensor

January 19, 2016 - Nagano, Japan

Hioki is pleased to announce the launch of the AC Clamp Meter 3280-10F (with mean value rectification) and 3280-20F (with true RMS measurement) alongside the optional AC Flexible Current Sensor CT6280.

Maintenance and management of electrical equipment in buildings and at manufacturing plants necessitates current and voltage measurement, and Hioki has long supplied clamp-on meters for use in the field by electrical professionals.

The 3280-10F and 3280-20F enhance the previous 3280-10 and 3280-20 with a broader range of operating temperatures along with the addition of the CT6280 as an option, making measurement more convenient for customers.

3280-10F and 3280-20F FEATURES

1. Ability to make measurements in confined locations easily with a flexible current sensor
As distribution panels have become smaller in recent years, the density of the wiring they contain has increased. As a result, it is becoming difficult to make measurements even with the low-profile jaws (as the clamp-on sensor portion of the instrument is known) that have been a feature of previous products. Hioki developed the optional AC Flexible Current Sensor CT6280 to address this challenge. The CT6280’s flexible sensor can be applied in locations where rigid jaws are not practical. In addition, the sensor cable’s cross-sectional diameter of 5 mm, which is narrower than that of competing products, allows it to be applied more easily even in locations with complex or tangled wiring. Furthermore, the CT6280 can be used to measure large currents of up to 4199 A.

 2. Broader operating temperature range for use in more environments
The 3280-10F and 3280-20F both feature an expanded operating temperature range of -25°C to 65°C, compared to 0°C to 40°C for previous products. Since the instruments can be used in cold locations with subzero temperatures as well as in hot regions where the temperature exceeds 40°C, they have a broader, more global appeal.


*  3280-10F AC Clamp Meter(with mean value rectification)
*  3280-20F AC Clamp Meter(with true RMS measurement)
*  3280-70F AC Clamp Meter Set (3280-10F with AC Flexible Current Sensor CT6280)
*  3280-90F AC Clamp Meter Set (3280-20F with AC Flexible Current Sensor CT6280)
*  CT6280 AC Flexible Current Sensor CT6280

*Difference between mean value rectification and true RMS measurement

Both methods yield the same result when converting a current’s electrical signal to an RMS value if the signal is distortion-free. However, if the signal being measured is distorted, mean value rectification introduces an error component, whereas true RMS measurement yields an accurate RMS value.


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 andquality 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 www.hioki.com.